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-rw-r--r--src/eval.c10837
1 files changed, 10837 insertions, 0 deletions
diff --git a/src/eval.c b/src/eval.c
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index 0000000..3f9db7d
--- /dev/null
+++ b/src/eval.c
@@ -0,0 +1,10837 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved by Bram Moolenaar
+ *
+ * Do ":help uganda" in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+/*
+ * eval.c: Expression evaluation.
+ */
+#define USING_FLOAT_STUFF
+
+#include "vim.h"
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+
+#ifdef VMS
+# include <float.h>
+#endif
+
+#define DICT_MAXNEST 100 /* maximum nesting of lists and dicts */
+
+static char *e_letunexp = N_("E18: Unexpected characters in :let");
+static char *e_undefvar = N_("E121: Undefined variable: %s");
+static char *e_missbrac = N_("E111: Missing ']'");
+static char *e_dictrange = N_("E719: Cannot use [:] with a Dictionary");
+static char *e_letwrong = N_("E734: Wrong variable type for %s=");
+static char *e_illvar = N_("E461: Illegal variable name: %s");
+#ifdef FEAT_FLOAT
+static char *e_float_as_string = N_("E806: using Float as a String");
+#endif
+
+#define NAMESPACE_CHAR (char_u *)"abglstvw"
+
+static dictitem_T globvars_var; /* variable used for g: */
+#define globvarht globvardict.dv_hashtab
+
+/*
+ * Old Vim variables such as "v:version" are also available without the "v:".
+ * Also in functions. We need a special hashtable for them.
+ */
+static hashtab_T compat_hashtab;
+
+/*
+ * When recursively copying lists and dicts we need to remember which ones we
+ * have done to avoid endless recursiveness. This unique ID is used for that.
+ * The last bit is used for previous_funccal, ignored when comparing.
+ */
+static int current_copyID = 0;
+
+/*
+ * Array to hold the hashtab with variables local to each sourced script.
+ * Each item holds a variable (nameless) that points to the dict_T.
+ */
+typedef struct
+{
+ dictitem_T sv_var;
+ dict_T sv_dict;
+} scriptvar_T;
+
+static garray_T ga_scripts = {0, 0, sizeof(scriptvar_T *), 4, NULL};
+#define SCRIPT_SV(id) (((scriptvar_T **)ga_scripts.ga_data)[(id) - 1])
+#define SCRIPT_VARS(id) (SCRIPT_SV(id)->sv_dict.dv_hashtab)
+
+static int echo_attr = 0; /* attributes used for ":echo" */
+
+/* The names of packages that once were loaded are remembered. */
+static garray_T ga_loaded = {0, 0, sizeof(char_u *), 4, NULL};
+
+/*
+ * Info used by a ":for" loop.
+ */
+typedef struct
+{
+ int fi_semicolon; /* TRUE if ending in '; var]' */
+ int fi_varcount; /* nr of variables in the list */
+ listwatch_T fi_lw; /* keep an eye on the item used. */
+ list_T *fi_list; /* list being used */
+ int fi_bi; /* index of blob */
+ blob_T *fi_blob; /* blob being used */
+} forinfo_T;
+
+
+/*
+ * Array to hold the value of v: variables.
+ * The value is in a dictitem, so that it can also be used in the v: scope.
+ * The reason to use this table anyway is for very quick access to the
+ * variables with the VV_ defines.
+ */
+
+/* values for vv_flags: */
+#define VV_COMPAT 1 /* compatible, also used without "v:" */
+#define VV_RO 2 /* read-only */
+#define VV_RO_SBX 4 /* read-only in the sandbox */
+
+#define VV_NAME(s, t) s, {{t, 0, {0}}, 0, {0}}
+
+static struct vimvar
+{
+ char *vv_name; /* name of variable, without v: */
+ dictitem16_T vv_di; /* value and name for key (max 16 chars!) */
+ char vv_flags; /* VV_COMPAT, VV_RO, VV_RO_SBX */
+} vimvars[VV_LEN] =
+{
+ /*
+ * The order here must match the VV_ defines in vim.h!
+ * Initializing a union does not work, leave tv.vval empty to get zero's.
+ */
+ {VV_NAME("count", VAR_NUMBER), VV_COMPAT+VV_RO},
+ {VV_NAME("count1", VAR_NUMBER), VV_RO},
+ {VV_NAME("prevcount", VAR_NUMBER), VV_RO},
+ {VV_NAME("errmsg", VAR_STRING), VV_COMPAT},
+ {VV_NAME("warningmsg", VAR_STRING), 0},
+ {VV_NAME("statusmsg", VAR_STRING), 0},
+ {VV_NAME("shell_error", VAR_NUMBER), VV_COMPAT+VV_RO},
+ {VV_NAME("this_session", VAR_STRING), VV_COMPAT},
+ {VV_NAME("version", VAR_NUMBER), VV_COMPAT+VV_RO},
+ {VV_NAME("lnum", VAR_NUMBER), VV_RO_SBX},
+ {VV_NAME("termresponse", VAR_STRING), VV_RO},
+ {VV_NAME("fname", VAR_STRING), VV_RO},
+ {VV_NAME("lang", VAR_STRING), VV_RO},
+ {VV_NAME("lc_time", VAR_STRING), VV_RO},
+ {VV_NAME("ctype", VAR_STRING), VV_RO},
+ {VV_NAME("charconvert_from", VAR_STRING), VV_RO},
+ {VV_NAME("charconvert_to", VAR_STRING), VV_RO},
+ {VV_NAME("fname_in", VAR_STRING), VV_RO},
+ {VV_NAME("fname_out", VAR_STRING), VV_RO},
+ {VV_NAME("fname_new", VAR_STRING), VV_RO},
+ {VV_NAME("fname_diff", VAR_STRING), VV_RO},
+ {VV_NAME("cmdarg", VAR_STRING), VV_RO},
+ {VV_NAME("foldstart", VAR_NUMBER), VV_RO_SBX},
+ {VV_NAME("foldend", VAR_NUMBER), VV_RO_SBX},
+ {VV_NAME("folddashes", VAR_STRING), VV_RO_SBX},
+ {VV_NAME("foldlevel", VAR_NUMBER), VV_RO_SBX},
+ {VV_NAME("progname", VAR_STRING), VV_RO},
+ {VV_NAME("servername", VAR_STRING), VV_RO},
+ {VV_NAME("dying", VAR_NUMBER), VV_RO},
+ {VV_NAME("exception", VAR_STRING), VV_RO},
+ {VV_NAME("throwpoint", VAR_STRING), VV_RO},
+ {VV_NAME("register", VAR_STRING), VV_RO},
+ {VV_NAME("cmdbang", VAR_NUMBER), VV_RO},
+ {VV_NAME("insertmode", VAR_STRING), VV_RO},
+ {VV_NAME("val", VAR_UNKNOWN), VV_RO},
+ {VV_NAME("key", VAR_UNKNOWN), VV_RO},
+ {VV_NAME("profiling", VAR_NUMBER), VV_RO},
+ {VV_NAME("fcs_reason", VAR_STRING), VV_RO},
+ {VV_NAME("fcs_choice", VAR_STRING), 0},
+ {VV_NAME("beval_bufnr", VAR_NUMBER), VV_RO},
+ {VV_NAME("beval_winnr", VAR_NUMBER), VV_RO},
+ {VV_NAME("beval_winid", VAR_NUMBER), VV_RO},
+ {VV_NAME("beval_lnum", VAR_NUMBER), VV_RO},
+ {VV_NAME("beval_col", VAR_NUMBER), VV_RO},
+ {VV_NAME("beval_text", VAR_STRING), VV_RO},
+ {VV_NAME("scrollstart", VAR_STRING), 0},
+ {VV_NAME("swapname", VAR_STRING), VV_RO},
+ {VV_NAME("swapchoice", VAR_STRING), 0},
+ {VV_NAME("swapcommand", VAR_STRING), VV_RO},
+ {VV_NAME("char", VAR_STRING), 0},
+ {VV_NAME("mouse_win", VAR_NUMBER), 0},
+ {VV_NAME("mouse_winid", VAR_NUMBER), 0},
+ {VV_NAME("mouse_lnum", VAR_NUMBER), 0},
+ {VV_NAME("mouse_col", VAR_NUMBER), 0},
+ {VV_NAME("operator", VAR_STRING), VV_RO},
+ {VV_NAME("searchforward", VAR_NUMBER), 0},
+ {VV_NAME("hlsearch", VAR_NUMBER), 0},
+ {VV_NAME("oldfiles", VAR_LIST), 0},
+ {VV_NAME("windowid", VAR_NUMBER), VV_RO},
+ {VV_NAME("progpath", VAR_STRING), VV_RO},
+ {VV_NAME("completed_item", VAR_DICT), VV_RO},
+ {VV_NAME("option_new", VAR_STRING), VV_RO},
+ {VV_NAME("option_old", VAR_STRING), VV_RO},
+ {VV_NAME("option_type", VAR_STRING), VV_RO},
+ {VV_NAME("errors", VAR_LIST), 0},
+ {VV_NAME("false", VAR_SPECIAL), VV_RO},
+ {VV_NAME("true", VAR_SPECIAL), VV_RO},
+ {VV_NAME("null", VAR_SPECIAL), VV_RO},
+ {VV_NAME("none", VAR_SPECIAL), VV_RO},
+ {VV_NAME("vim_did_enter", VAR_NUMBER), VV_RO},
+ {VV_NAME("testing", VAR_NUMBER), 0},
+ {VV_NAME("t_number", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_string", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_func", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_list", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_dict", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_float", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_bool", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_none", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_job", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_channel", VAR_NUMBER), VV_RO},
+ {VV_NAME("t_blob", VAR_NUMBER), VV_RO},
+ {VV_NAME("termrfgresp", VAR_STRING), VV_RO},
+ {VV_NAME("termrbgresp", VAR_STRING), VV_RO},
+ {VV_NAME("termu7resp", VAR_STRING), VV_RO},
+ {VV_NAME("termstyleresp", VAR_STRING), VV_RO},
+ {VV_NAME("termblinkresp", VAR_STRING), VV_RO},
+ {VV_NAME("event", VAR_DICT), VV_RO},
+};
+
+/* shorthand */
+#define vv_type vv_di.di_tv.v_type
+#define vv_nr vv_di.di_tv.vval.v_number
+#define vv_float vv_di.di_tv.vval.v_float
+#define vv_str vv_di.di_tv.vval.v_string
+#define vv_list vv_di.di_tv.vval.v_list
+#define vv_dict vv_di.di_tv.vval.v_dict
+#define vv_blob vv_di.di_tv.vval.v_blob
+#define vv_tv vv_di.di_tv
+
+static dictitem_T vimvars_var; /* variable used for v: */
+#define vimvarht vimvardict.dv_hashtab
+
+static int ex_let_vars(char_u *arg, typval_T *tv, int copy, int semicolon, int var_count, char_u *nextchars);
+static char_u *skip_var_list(char_u *arg, int *var_count, int *semicolon);
+static char_u *skip_var_one(char_u *arg);
+static void list_glob_vars(int *first);
+static void list_buf_vars(int *first);
+static void list_win_vars(int *first);
+static void list_tab_vars(int *first);
+static void list_vim_vars(int *first);
+static void list_script_vars(int *first);
+static char_u *list_arg_vars(exarg_T *eap, char_u *arg, int *first);
+static char_u *ex_let_one(char_u *arg, typval_T *tv, int copy, char_u *endchars, char_u *op);
+static void set_var_lval(lval_T *lp, char_u *endp, typval_T *rettv, int copy, char_u *op);
+static int tv_op(typval_T *tv1, typval_T *tv2, char_u *op);
+static void ex_unletlock(exarg_T *eap, char_u *argstart, int deep);
+static int do_unlet_var(lval_T *lp, char_u *name_end, int forceit);
+static int do_lock_var(lval_T *lp, char_u *name_end, int deep, int lock);
+static void item_lock(typval_T *tv, int deep, int lock);
+
+static int eval2(char_u **arg, typval_T *rettv, int evaluate);
+static int eval3(char_u **arg, typval_T *rettv, int evaluate);
+static int eval4(char_u **arg, typval_T *rettv, int evaluate);
+static int eval5(char_u **arg, typval_T *rettv, int evaluate);
+static int eval6(char_u **arg, typval_T *rettv, int evaluate, int want_string);
+static int eval7(char_u **arg, typval_T *rettv, int evaluate, int want_string);
+
+static int get_string_tv(char_u **arg, typval_T *rettv, int evaluate);
+static int get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate);
+static int free_unref_items(int copyID);
+static int get_env_tv(char_u **arg, typval_T *rettv, int evaluate);
+static int get_env_len(char_u **arg);
+static char_u * make_expanded_name(char_u *in_start, char_u *expr_start, char_u *expr_end, char_u *in_end);
+static void check_vars(char_u *name, int len);
+static typval_T *alloc_string_tv(char_u *string);
+static void delete_var(hashtab_T *ht, hashitem_T *hi);
+static void list_one_var(dictitem_T *v, char *prefix, int *first);
+static void list_one_var_a(char *prefix, char_u *name, int type, char_u *string, int *first);
+static char_u *find_option_end(char_u **arg, int *opt_flags);
+
+/* for VIM_VERSION_ defines */
+#include "version.h"
+
+
+#if defined(EBCDIC) || defined(PROTO)
+/*
+ * Compare struct fst by function name.
+ */
+ static int
+compare_func_name(const void *s1, const void *s2)
+{
+ struct fst *p1 = (struct fst *)s1;
+ struct fst *p2 = (struct fst *)s2;
+
+ return STRCMP(p1->f_name, p2->f_name);
+}
+
+/*
+ * Sort the function table by function name.
+ * The sorting of the table above is ASCII dependent.
+ * On machines using EBCDIC we have to sort it.
+ */
+ static void
+sortFunctions(void)
+{
+ int funcCnt = (int)(sizeof(functions) / sizeof(struct fst)) - 1;
+
+ qsort(functions, (size_t)funcCnt, sizeof(struct fst), compare_func_name);
+}
+#endif
+
+
+/*
+ * Initialize the global and v: variables.
+ */
+ void
+eval_init(void)
+{
+ int i;
+ struct vimvar *p;
+
+ init_var_dict(&globvardict, &globvars_var, VAR_DEF_SCOPE);
+ init_var_dict(&vimvardict, &vimvars_var, VAR_SCOPE);
+ vimvardict.dv_lock = VAR_FIXED;
+ hash_init(&compat_hashtab);
+ func_init();
+
+ for (i = 0; i < VV_LEN; ++i)
+ {
+ p = &vimvars[i];
+ if (STRLEN(p->vv_name) > 16)
+ {
+ iemsg("INTERNAL: name too long, increase size of dictitem16_T");
+ getout(1);
+ }
+ STRCPY(p->vv_di.di_key, p->vv_name);
+ if (p->vv_flags & VV_RO)
+ p->vv_di.di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
+ else if (p->vv_flags & VV_RO_SBX)
+ p->vv_di.di_flags = DI_FLAGS_RO_SBX | DI_FLAGS_FIX;
+ else
+ p->vv_di.di_flags = DI_FLAGS_FIX;
+
+ /* add to v: scope dict, unless the value is not always available */
+ if (p->vv_type != VAR_UNKNOWN)
+ hash_add(&vimvarht, p->vv_di.di_key);
+ if (p->vv_flags & VV_COMPAT)
+ /* add to compat scope dict */
+ hash_add(&compat_hashtab, p->vv_di.di_key);
+ }
+ vimvars[VV_VERSION].vv_nr = VIM_VERSION_100;
+
+ set_vim_var_nr(VV_SEARCHFORWARD, 1L);
+ set_vim_var_nr(VV_HLSEARCH, 1L);
+ set_vim_var_dict(VV_COMPLETED_ITEM, dict_alloc_lock(VAR_FIXED));
+ set_vim_var_list(VV_ERRORS, list_alloc());
+ set_vim_var_dict(VV_EVENT, dict_alloc_lock(VAR_FIXED));
+
+ set_vim_var_nr(VV_FALSE, VVAL_FALSE);
+ set_vim_var_nr(VV_TRUE, VVAL_TRUE);
+ set_vim_var_nr(VV_NONE, VVAL_NONE);
+ set_vim_var_nr(VV_NULL, VVAL_NULL);
+
+ set_vim_var_nr(VV_TYPE_NUMBER, VAR_TYPE_NUMBER);
+ set_vim_var_nr(VV_TYPE_STRING, VAR_TYPE_STRING);
+ set_vim_var_nr(VV_TYPE_FUNC, VAR_TYPE_FUNC);
+ set_vim_var_nr(VV_TYPE_LIST, VAR_TYPE_LIST);
+ set_vim_var_nr(VV_TYPE_DICT, VAR_TYPE_DICT);
+ set_vim_var_nr(VV_TYPE_FLOAT, VAR_TYPE_FLOAT);
+ set_vim_var_nr(VV_TYPE_BOOL, VAR_TYPE_BOOL);
+ set_vim_var_nr(VV_TYPE_NONE, VAR_TYPE_NONE);
+ set_vim_var_nr(VV_TYPE_JOB, VAR_TYPE_JOB);
+ set_vim_var_nr(VV_TYPE_CHANNEL, VAR_TYPE_CHANNEL);
+ set_vim_var_nr(VV_TYPE_BLOB, VAR_TYPE_BLOB);
+
+ set_reg_var(0); /* default for v:register is not 0 but '"' */
+
+#ifdef EBCDIC
+ /*
+ * Sort the function table, to enable binary search.
+ */
+ sortFunctions();
+#endif
+}
+
+#if defined(EXITFREE) || defined(PROTO)
+ void
+eval_clear(void)
+{
+ int i;
+ struct vimvar *p;
+
+ for (i = 0; i < VV_LEN; ++i)
+ {
+ p = &vimvars[i];
+ if (p->vv_di.di_tv.v_type == VAR_STRING)
+ VIM_CLEAR(p->vv_str);
+ else if (p->vv_di.di_tv.v_type == VAR_LIST)
+ {
+ list_unref(p->vv_list);
+ p->vv_list = NULL;
+ }
+ }
+ hash_clear(&vimvarht);
+ hash_init(&vimvarht); /* garbage_collect() will access it */
+ hash_clear(&compat_hashtab);
+
+ free_scriptnames();
+# if defined(FEAT_CMDL_COMPL)
+ free_locales();
+# endif
+
+ /* global variables */
+ vars_clear(&globvarht);
+
+ /* autoloaded script names */
+ ga_clear_strings(&ga_loaded);
+
+ /* Script-local variables. First clear all the variables and in a second
+ * loop free the scriptvar_T, because a variable in one script might hold
+ * a reference to the whole scope of another script. */
+ for (i = 1; i <= ga_scripts.ga_len; ++i)
+ vars_clear(&SCRIPT_VARS(i));
+ for (i = 1; i <= ga_scripts.ga_len; ++i)
+ vim_free(SCRIPT_SV(i));
+ ga_clear(&ga_scripts);
+
+ /* unreferenced lists and dicts */
+ (void)garbage_collect(FALSE);
+
+ /* functions */
+ free_all_functions();
+}
+#endif
+
+
+/*
+ * Set an internal variable to a string value. Creates the variable if it does
+ * not already exist.
+ */
+ void
+set_internal_string_var(char_u *name, char_u *value)
+{
+ char_u *val;
+ typval_T *tvp;
+
+ val = vim_strsave(value);
+ if (val != NULL)
+ {
+ tvp = alloc_string_tv(val);
+ if (tvp != NULL)
+ {
+ set_var(name, tvp, FALSE);
+ free_tv(tvp);
+ }
+ }
+}
+
+static lval_T *redir_lval = NULL;
+#define EVALCMD_BUSY (redir_lval == (lval_T *)&redir_lval)
+static garray_T redir_ga; /* only valid when redir_lval is not NULL */
+static char_u *redir_endp = NULL;
+static char_u *redir_varname = NULL;
+
+/*
+ * Start recording command output to a variable
+ * When "append" is TRUE append to an existing variable.
+ * Returns OK if successfully completed the setup. FAIL otherwise.
+ */
+ int
+var_redir_start(char_u *name, int append)
+{
+ int save_emsg;
+ int err;
+ typval_T tv;
+
+ /* Catch a bad name early. */
+ if (!eval_isnamec1(*name))
+ {
+ emsg(_(e_invarg));
+ return FAIL;
+ }
+
+ /* Make a copy of the name, it is used in redir_lval until redir ends. */
+ redir_varname = vim_strsave(name);
+ if (redir_varname == NULL)
+ return FAIL;
+
+ redir_lval = (lval_T *)alloc_clear((unsigned)sizeof(lval_T));
+ if (redir_lval == NULL)
+ {
+ var_redir_stop();
+ return FAIL;
+ }
+
+ /* The output is stored in growarray "redir_ga" until redirection ends. */
+ ga_init2(&redir_ga, (int)sizeof(char), 500);
+
+ /* Parse the variable name (can be a dict or list entry). */
+ redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, 0,
+ FNE_CHECK_START);
+ if (redir_endp == NULL || redir_lval->ll_name == NULL || *redir_endp != NUL)
+ {
+ clear_lval(redir_lval);
+ if (redir_endp != NULL && *redir_endp != NUL)
+ /* Trailing characters are present after the variable name */
+ emsg(_(e_trailing));
+ else
+ emsg(_(e_invarg));
+ redir_endp = NULL; /* don't store a value, only cleanup */
+ var_redir_stop();
+ return FAIL;
+ }
+
+ /* check if we can write to the variable: set it to or append an empty
+ * string */
+ save_emsg = did_emsg;
+ did_emsg = FALSE;
+ tv.v_type = VAR_STRING;
+ tv.vval.v_string = (char_u *)"";
+ if (append)
+ set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)".");
+ else
+ set_var_lval(redir_lval, redir_endp, &tv, TRUE, (char_u *)"=");
+ clear_lval(redir_lval);
+ err = did_emsg;
+ did_emsg |= save_emsg;
+ if (err)
+ {
+ redir_endp = NULL; /* don't store a value, only cleanup */
+ var_redir_stop();
+ return FAIL;
+ }
+
+ return OK;
+}
+
+/*
+ * Append "value[value_len]" to the variable set by var_redir_start().
+ * The actual appending is postponed until redirection ends, because the value
+ * appended may in fact be the string we write to, changing it may cause freed
+ * memory to be used:
+ * :redir => foo
+ * :let foo
+ * :redir END
+ */
+ void
+var_redir_str(char_u *value, int value_len)
+{
+ int len;
+
+ if (redir_lval == NULL)
+ return;
+
+ if (value_len == -1)
+ len = (int)STRLEN(value); /* Append the entire string */
+ else
+ len = value_len; /* Append only "value_len" characters */
+
+ if (ga_grow(&redir_ga, len) == OK)
+ {
+ mch_memmove((char *)redir_ga.ga_data + redir_ga.ga_len, value, len);
+ redir_ga.ga_len += len;
+ }
+ else
+ var_redir_stop();
+}
+
+/*
+ * Stop redirecting command output to a variable.
+ * Frees the allocated memory.
+ */
+ void
+var_redir_stop(void)
+{
+ typval_T tv;
+
+ if (EVALCMD_BUSY)
+ {
+ redir_lval = NULL;
+ return;
+ }
+
+ if (redir_lval != NULL)
+ {
+ /* If there was no error: assign the text to the variable. */
+ if (redir_endp != NULL)
+ {
+ ga_append(&redir_ga, NUL); /* Append the trailing NUL. */
+ tv.v_type = VAR_STRING;
+ tv.vval.v_string = redir_ga.ga_data;
+ /* Call get_lval() again, if it's inside a Dict or List it may
+ * have changed. */
+ redir_endp = get_lval(redir_varname, NULL, redir_lval,
+ FALSE, FALSE, 0, FNE_CHECK_START);
+ if (redir_endp != NULL && redir_lval->ll_name != NULL)
+ set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
+ clear_lval(redir_lval);
+ }
+
+ /* free the collected output */
+ VIM_CLEAR(redir_ga.ga_data);
+
+ VIM_CLEAR(redir_lval);
+ }
+ VIM_CLEAR(redir_varname);
+}
+
+ int
+eval_charconvert(
+ char_u *enc_from,
+ char_u *enc_to,
+ char_u *fname_from,
+ char_u *fname_to)
+{
+ int err = FALSE;
+
+ set_vim_var_string(VV_CC_FROM, enc_from, -1);
+ set_vim_var_string(VV_CC_TO, enc_to, -1);
+ set_vim_var_string(VV_FNAME_IN, fname_from, -1);
+ set_vim_var_string(VV_FNAME_OUT, fname_to, -1);
+ if (eval_to_bool(p_ccv, &err, NULL, FALSE))
+ err = TRUE;
+ set_vim_var_string(VV_CC_FROM, NULL, -1);
+ set_vim_var_string(VV_CC_TO, NULL, -1);
+ set_vim_var_string(VV_FNAME_IN, NULL, -1);
+ set_vim_var_string(VV_FNAME_OUT, NULL, -1);
+
+ if (err)
+ return FAIL;
+ return OK;
+}
+
+# if defined(FEAT_POSTSCRIPT) || defined(PROTO)
+ int
+eval_printexpr(char_u *fname, char_u *args)
+{
+ int err = FALSE;
+
+ set_vim_var_string(VV_FNAME_IN, fname, -1);
+ set_vim_var_string(VV_CMDARG, args, -1);
+ if (eval_to_bool(p_pexpr, &err, NULL, FALSE))
+ err = TRUE;
+ set_vim_var_string(VV_FNAME_IN, NULL, -1);
+ set_vim_var_string(VV_CMDARG, NULL, -1);
+
+ if (err)
+ {
+ mch_remove(fname);
+ return FAIL;
+ }
+ return OK;
+}
+# endif
+
+# if defined(FEAT_DIFF) || defined(PROTO)
+ void
+eval_diff(
+ char_u *origfile,
+ char_u *newfile,
+ char_u *outfile)
+{
+ int err = FALSE;
+
+ set_vim_var_string(VV_FNAME_IN, origfile, -1);
+ set_vim_var_string(VV_FNAME_NEW, newfile, -1);
+ set_vim_var_string(VV_FNAME_OUT, outfile, -1);
+ (void)eval_to_bool(p_dex, &err, NULL, FALSE);
+ set_vim_var_string(VV_FNAME_IN, NULL, -1);
+ set_vim_var_string(VV_FNAME_NEW, NULL, -1);
+ set_vim_var_string(VV_FNAME_OUT, NULL, -1);
+}
+
+ void
+eval_patch(
+ char_u *origfile,
+ char_u *difffile,
+ char_u *outfile)
+{
+ int err;
+
+ set_vim_var_string(VV_FNAME_IN, origfile, -1);
+ set_vim_var_string(VV_FNAME_DIFF, difffile, -1);
+ set_vim_var_string(VV_FNAME_OUT, outfile, -1);
+ (void)eval_to_bool(p_pex, &err, NULL, FALSE);
+ set_vim_var_string(VV_FNAME_IN, NULL, -1);
+ set_vim_var_string(VV_FNAME_DIFF, NULL, -1);
+ set_vim_var_string(VV_FNAME_OUT, NULL, -1);
+}
+# endif
+
+/*
+ * Top level evaluation function, returning a boolean.
+ * Sets "error" to TRUE if there was an error.
+ * Return TRUE or FALSE.
+ */
+ int
+eval_to_bool(
+ char_u *arg,
+ int *error,
+ char_u **nextcmd,
+ int skip) /* only parse, don't execute */
+{
+ typval_T tv;
+ varnumber_T retval = FALSE;
+
+ if (skip)
+ ++emsg_skip;
+ if (eval0(arg, &tv, nextcmd, !skip) == FAIL)
+ *error = TRUE;
+ else
+ {
+ *error = FALSE;
+ if (!skip)
+ {
+ retval = (tv_get_number_chk(&tv, error) != 0);
+ clear_tv(&tv);
+ }
+ }
+ if (skip)
+ --emsg_skip;
+
+ return (int)retval;
+}
+
+/*
+ * Call eval1() and give an error message if not done at a lower level.
+ */
+ static int
+eval1_emsg(char_u **arg, typval_T *rettv, int evaluate)
+{
+ char_u *start = *arg;
+ int ret;
+ int did_emsg_before = did_emsg;
+ int called_emsg_before = called_emsg;
+
+ ret = eval1(arg, rettv, evaluate);
+ if (ret == FAIL)
+ {
+ // Report the invalid expression unless the expression evaluation has
+ // been cancelled due to an aborting error, an interrupt, or an
+ // exception, or we already gave a more specific error.
+ // Also check called_emsg for when using assert_fails().
+ if (!aborting() && did_emsg == did_emsg_before
+ && called_emsg == called_emsg_before)
+ semsg(_(e_invexpr2), start);
+ }
+ return ret;
+}
+
+ static int
+eval_expr_typval(typval_T *expr, typval_T *argv, int argc, typval_T *rettv)
+{
+ char_u *s;
+ int dummy;
+ char_u buf[NUMBUFLEN];
+
+ if (expr->v_type == VAR_FUNC)
+ {
+ s = expr->vval.v_string;
+ if (s == NULL || *s == NUL)
+ return FAIL;
+ if (call_func(s, (int)STRLEN(s), rettv, argc, argv, NULL,
+ 0L, 0L, &dummy, TRUE, NULL, NULL) == FAIL)
+ return FAIL;
+ }
+ else if (expr->v_type == VAR_PARTIAL)
+ {
+ partial_T *partial = expr->vval.v_partial;
+
+ s = partial_name(partial);
+ if (s == NULL || *s == NUL)
+ return FAIL;
+ if (call_func(s, (int)STRLEN(s), rettv, argc, argv, NULL,
+ 0L, 0L, &dummy, TRUE, partial, NULL) == FAIL)
+ return FAIL;
+ }
+ else
+ {
+ s = tv_get_string_buf_chk(expr, buf);
+ if (s == NULL)
+ return FAIL;
+ s = skipwhite(s);
+ if (eval1_emsg(&s, rettv, TRUE) == FAIL)
+ return FAIL;
+ if (*s != NUL) /* check for trailing chars after expr */
+ {
+ clear_tv(rettv);
+ semsg(_(e_invexpr2), s);
+ return FAIL;
+ }
+ }
+ return OK;
+}
+
+/*
+ * Like eval_to_bool() but using a typval_T instead of a string.
+ * Works for string, funcref and partial.
+ */
+ int
+eval_expr_to_bool(typval_T *expr, int *error)
+{
+ typval_T rettv;
+ int res;
+
+ if (eval_expr_typval(expr, NULL, 0, &rettv) == FAIL)
+ {
+ *error = TRUE;
+ return FALSE;
+ }
+ res = (tv_get_number_chk(&rettv, error) != 0);
+ clear_tv(&rettv);
+ return res;
+}
+
+/*
+ * Top level evaluation function, returning a string. If "skip" is TRUE,
+ * only parsing to "nextcmd" is done, without reporting errors. Return
+ * pointer to allocated memory, or NULL for failure or when "skip" is TRUE.
+ */
+ char_u *
+eval_to_string_skip(
+ char_u *arg,
+ char_u **nextcmd,
+ int skip) /* only parse, don't execute */
+{
+ typval_T tv;
+ char_u *retval;
+
+ if (skip)
+ ++emsg_skip;
+ if (eval0(arg, &tv, nextcmd, !skip) == FAIL || skip)
+ retval = NULL;
+ else
+ {
+ retval = vim_strsave(tv_get_string(&tv));
+ clear_tv(&tv);
+ }
+ if (skip)
+ --emsg_skip;
+
+ return retval;
+}
+
+/*
+ * Skip over an expression at "*pp".
+ * Return FAIL for an error, OK otherwise.
+ */
+ int
+skip_expr(char_u **pp)
+{
+ typval_T rettv;
+
+ *pp = skipwhite(*pp);
+ return eval1(pp, &rettv, FALSE);
+}
+
+/*
+ * Top level evaluation function, returning a string.
+ * When "convert" is TRUE convert a List into a sequence of lines and convert
+ * a Float to a String.
+ * Return pointer to allocated memory, or NULL for failure.
+ */
+ char_u *
+eval_to_string(
+ char_u *arg,
+ char_u **nextcmd,
+ int convert)
+{
+ typval_T tv;
+ char_u *retval;
+ garray_T ga;
+#ifdef FEAT_FLOAT
+ char_u numbuf[NUMBUFLEN];
+#endif
+
+ if (eval0(arg, &tv, nextcmd, TRUE) == FAIL)
+ retval = NULL;
+ else
+ {
+ if (convert && tv.v_type == VAR_LIST)
+ {
+ ga_init2(&ga, (int)sizeof(char), 80);
+ if (tv.vval.v_list != NULL)
+ {
+ list_join(&ga, tv.vval.v_list, (char_u *)"\n", TRUE, FALSE, 0);
+ if (tv.vval.v_list->lv_len > 0)
+ ga_append(&ga, NL);
+ }
+ ga_append(&ga, NUL);
+ retval = (char_u *)ga.ga_data;
+ }
+#ifdef FEAT_FLOAT
+ else if (convert && tv.v_type == VAR_FLOAT)
+ {
+ vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv.vval.v_float);
+ retval = vim_strsave(numbuf);
+ }
+#endif
+ else
+ retval = vim_strsave(tv_get_string(&tv));
+ clear_tv(&tv);
+ }
+
+ return retval;
+}
+
+/*
+ * Call eval_to_string() without using current local variables and using
+ * textlock. When "use_sandbox" is TRUE use the sandbox.
+ */
+ char_u *
+eval_to_string_safe(
+ char_u *arg,
+ char_u **nextcmd,
+ int use_sandbox)
+{
+ char_u *retval;
+ funccal_entry_T funccal_entry;
+
+ save_funccal(&funccal_entry);
+ if (use_sandbox)
+ ++sandbox;
+ ++textlock;
+ retval = eval_to_string(arg, nextcmd, FALSE);
+ if (use_sandbox)
+ --sandbox;
+ --textlock;
+ restore_funccal();
+ return retval;
+}
+
+/*
+ * Top level evaluation function, returning a number.
+ * Evaluates "expr" silently.
+ * Returns -1 for an error.
+ */
+ varnumber_T
+eval_to_number(char_u *expr)
+{
+ typval_T rettv;
+ varnumber_T retval;
+ char_u *p = skipwhite(expr);
+
+ ++emsg_off;
+
+ if (eval1(&p, &rettv, TRUE) == FAIL)
+ retval = -1;
+ else
+ {
+ retval = tv_get_number_chk(&rettv, NULL);
+ clear_tv(&rettv);
+ }
+ --emsg_off;
+
+ return retval;
+}
+
+/*
+ * Prepare v: variable "idx" to be used.
+ * Save the current typeval in "save_tv".
+ * When not used yet add the variable to the v: hashtable.
+ */
+ static void
+prepare_vimvar(int idx, typval_T *save_tv)
+{
+ *save_tv = vimvars[idx].vv_tv;
+ if (vimvars[idx].vv_type == VAR_UNKNOWN)
+ hash_add(&vimvarht, vimvars[idx].vv_di.di_key);
+}
+
+/*
+ * Restore v: variable "idx" to typeval "save_tv".
+ * When no longer defined, remove the variable from the v: hashtable.
+ */
+ static void
+restore_vimvar(int idx, typval_T *save_tv)
+{
+ hashitem_T *hi;
+
+ vimvars[idx].vv_tv = *save_tv;
+ if (vimvars[idx].vv_type == VAR_UNKNOWN)
+ {
+ hi = hash_find(&vimvarht, vimvars[idx].vv_di.di_key);
+ if (HASHITEM_EMPTY(hi))
+ internal_error("restore_vimvar()");
+ else
+ hash_remove(&vimvarht, hi);
+ }
+}
+
+#if defined(FEAT_SPELL) || defined(PROTO)
+/*
+ * Evaluate an expression to a list with suggestions.
+ * For the "expr:" part of 'spellsuggest'.
+ * Returns NULL when there is an error.
+ */
+ list_T *
+eval_spell_expr(char_u *badword, char_u *expr)
+{
+ typval_T save_val;
+ typval_T rettv;
+ list_T *list = NULL;
+ char_u *p = skipwhite(expr);
+
+ /* Set "v:val" to the bad word. */
+ prepare_vimvar(VV_VAL, &save_val);
+ vimvars[VV_VAL].vv_type = VAR_STRING;
+ vimvars[VV_VAL].vv_str = badword;
+ if (p_verbose == 0)
+ ++emsg_off;
+
+ if (eval1(&p, &rettv, TRUE) == OK)
+ {
+ if (rettv.v_type != VAR_LIST)
+ clear_tv(&rettv);
+ else
+ list = rettv.vval.v_list;
+ }
+
+ if (p_verbose == 0)
+ --emsg_off;
+ restore_vimvar(VV_VAL, &save_val);
+
+ return list;
+}
+
+/*
+ * "list" is supposed to contain two items: a word and a number. Return the
+ * word in "pp" and the number as the return value.
+ * Return -1 if anything isn't right.
+ * Used to get the good word and score from the eval_spell_expr() result.
+ */
+ int
+get_spellword(list_T *list, char_u **pp)
+{
+ listitem_T *li;
+
+ li = list->lv_first;
+ if (li == NULL)
+ return -1;
+ *pp = tv_get_string(&li->li_tv);
+
+ li = li->li_next;
+ if (li == NULL)
+ return -1;
+ return (int)tv_get_number(&li->li_tv);
+}
+#endif
+
+/*
+ * Top level evaluation function.
+ * Returns an allocated typval_T with the result.
+ * Returns NULL when there is an error.
+ */
+ typval_T *
+eval_expr(char_u *arg, char_u **nextcmd)
+{
+ typval_T *tv;
+
+ tv = (typval_T *)alloc(sizeof(typval_T));
+ if (tv != NULL && eval0(arg, tv, nextcmd, TRUE) == FAIL)
+ VIM_CLEAR(tv);
+
+ return tv;
+}
+
+
+/*
+ * Call some Vim script function and return the result in "*rettv".
+ * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc]
+ * should have type VAR_UNKNOWN.
+ * Returns OK or FAIL.
+ */
+ int
+call_vim_function(
+ char_u *func,
+ int argc,
+ typval_T *argv,
+ typval_T *rettv)
+{
+ int doesrange;
+ int ret;
+
+ rettv->v_type = VAR_UNKNOWN; /* clear_tv() uses this */
+ ret = call_func(func, (int)STRLEN(func), rettv, argc, argv, NULL,
+ curwin->w_cursor.lnum, curwin->w_cursor.lnum,
+ &doesrange, TRUE, NULL, NULL);
+ if (ret == FAIL)
+ clear_tv(rettv);
+
+ return ret;
+}
+
+/*
+ * Call Vim script function "func" and return the result as a number.
+ * Returns -1 when calling the function fails.
+ * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should
+ * have type VAR_UNKNOWN.
+ */
+ varnumber_T
+call_func_retnr(
+ char_u *func,
+ int argc,
+ typval_T *argv)
+{
+ typval_T rettv;
+ varnumber_T retval;
+
+ if (call_vim_function(func, argc, argv, &rettv) == FAIL)
+ return -1;
+
+ retval = tv_get_number_chk(&rettv, NULL);
+ clear_tv(&rettv);
+ return retval;
+}
+
+#if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) \
+ || defined(FEAT_COMPL_FUNC) || defined(PROTO)
+
+# if (defined(FEAT_USR_CMDS) && defined(FEAT_CMDL_COMPL)) || defined(PROTO)
+/*
+ * Call Vim script function "func" and return the result as a string.
+ * Returns NULL when calling the function fails.
+ * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should
+ * have type VAR_UNKNOWN.
+ */
+ void *
+call_func_retstr(
+ char_u *func,
+ int argc,
+ typval_T *argv)
+{
+ typval_T rettv;
+ char_u *retval;
+
+ if (call_vim_function(func, argc, argv, &rettv) == FAIL)
+ return NULL;
+
+ retval = vim_strsave(tv_get_string(&rettv));
+ clear_tv(&rettv);
+ return retval;
+}
+# endif
+
+/*
+ * Call Vim script function "func" and return the result as a List.
+ * Uses argv[0] to argv[argc - 1] for the function arguments. argv[argc] should
+ * have type VAR_UNKNOWN.
+ * Returns NULL when there is something wrong.
+ */
+ void *
+call_func_retlist(
+ char_u *func,
+ int argc,
+ typval_T *argv)
+{
+ typval_T rettv;
+
+ if (call_vim_function(func, argc, argv, &rettv) == FAIL)
+ return NULL;
+
+ if (rettv.v_type != VAR_LIST)
+ {
+ clear_tv(&rettv);
+ return NULL;
+ }
+
+ return rettv.vval.v_list;
+}
+#endif
+
+
+#ifdef FEAT_FOLDING
+/*
+ * Evaluate 'foldexpr'. Returns the foldlevel, and any character preceding
+ * it in "*cp". Doesn't give error messages.
+ */
+ int
+eval_foldexpr(char_u *arg, int *cp)
+{
+ typval_T tv;
+ varnumber_T retval;
+ char_u *s;
+ int use_sandbox = was_set_insecurely((char_u *)"foldexpr",
+ OPT_LOCAL);
+
+ ++emsg_off;
+ if (use_sandbox)
+ ++sandbox;
+ ++textlock;
+ *cp = NUL;
+ if (eval0(arg, &tv, NULL, TRUE) == FAIL)
+ retval = 0;
+ else
+ {
+ /* If the result is a number, just return the number. */
+ if (tv.v_type == VAR_NUMBER)
+ retval = tv.vval.v_number;
+ else if (tv.v_type != VAR_STRING || tv.vval.v_string == NULL)
+ retval = 0;
+ else
+ {
+ /* If the result is a string, check if there is a non-digit before
+ * the number. */
+ s = tv.vval.v_string;
+ if (!VIM_ISDIGIT(*s) && *s != '-')
+ *cp = *s++;
+ retval = atol((char *)s);
+ }
+ clear_tv(&tv);
+ }
+ --emsg_off;
+ if (use_sandbox)
+ --sandbox;
+ --textlock;
+
+ return (int)retval;
+}
+#endif
+
+/*
+ * ":let" list all variable values
+ * ":let var1 var2" list variable values
+ * ":let var = expr" assignment command.
+ * ":let var += expr" assignment command.
+ * ":let var -= expr" assignment command.
+ * ":let var .= expr" assignment command.
+ * ":let [var1, var2] = expr" unpack list.
+ */
+ void
+ex_let(exarg_T *eap)
+{
+ char_u *arg = eap->arg;
+ char_u *expr = NULL;
+ typval_T rettv;
+ int i;
+ int var_count = 0;
+ int semicolon = 0;
+ char_u op[2];
+ char_u *argend;
+ int first = TRUE;
+
+ argend = skip_var_list(arg, &var_count, &semicolon);
+ if (argend == NULL)
+ return;
+ if (argend > arg && argend[-1] == '.') /* for var.='str' */
+ --argend;
+ expr = skipwhite(argend);
+ if (*expr != '=' && !(vim_strchr((char_u *)"+-.", *expr) != NULL
+ && expr[1] == '='))
+ {
+ /*
+ * ":let" without "=": list variables
+ */
+ if (*arg == '[')
+ emsg(_(e_invarg));
+ else if (!ends_excmd(*arg))
+ /* ":let var1 var2" */
+ arg = list_arg_vars(eap, arg, &first);
+ else if (!eap->skip)
+ {
+ /* ":let" */
+ list_glob_vars(&first);
+ list_buf_vars(&first);
+ list_win_vars(&first);
+ list_tab_vars(&first);
+ list_script_vars(&first);
+ list_func_vars(&first);
+ list_vim_vars(&first);
+ }
+ eap->nextcmd = check_nextcmd(arg);
+ }
+ else
+ {
+ op[0] = '=';
+ op[1] = NUL;
+ if (*expr != '=')
+ {
+ if (vim_strchr((char_u *)"+-.", *expr) != NULL)
+ op[0] = *expr; /* +=, -= or .= */
+ expr = skipwhite(expr + 2);
+ }
+ else
+ expr = skipwhite(expr + 1);
+
+ if (eap->skip)
+ ++emsg_skip;
+ i = eval0(expr, &rettv, &eap->nextcmd, !eap->skip);
+ if (eap->skip)
+ {
+ if (i != FAIL)
+ clear_tv(&rettv);
+ --emsg_skip;
+ }
+ else if (i != FAIL)
+ {
+ (void)ex_let_vars(eap->arg, &rettv, FALSE, semicolon, var_count,
+ op);
+ clear_tv(&rettv);
+ }
+ }
+}
+
+/*
+ * Assign the typevalue "tv" to the variable or variables at "arg_start".
+ * Handles both "var" with any type and "[var, var; var]" with a list type.
+ * When "nextchars" is not NULL it points to a string with characters that
+ * must appear after the variable(s). Use "+", "-" or "." for add, subtract
+ * or concatenate.
+ * Returns OK or FAIL;
+ */
+ static int
+ex_let_vars(
+ char_u *arg_start,
+ typval_T *tv,
+ int copy, /* copy values from "tv", don't move */
+ int semicolon, /* from skip_var_list() */
+ int var_count, /* from skip_var_list() */
+ char_u *nextchars)
+{
+ char_u *arg = arg_start;
+ list_T *l;
+ int i;
+ listitem_T *item;
+ typval_T ltv;
+
+ if (*arg != '[')
+ {
+ /*
+ * ":let var = expr" or ":for var in list"
+ */
+ if (ex_let_one(arg, tv, copy, nextchars, nextchars) == NULL)
+ return FAIL;
+ return OK;
+ }
+
+ /*
+ * ":let [v1, v2] = list" or ":for [v1, v2] in listlist"
+ */
+ if (tv->v_type != VAR_LIST || (l = tv->vval.v_list) == NULL)
+ {
+ emsg(_(e_listreq));
+ return FAIL;
+ }
+
+ i = list_len(l);
+ if (semicolon == 0 && var_count < i)
+ {
+ emsg(_("E687: Less targets than List items"));
+ return FAIL;
+ }
+ if (var_count - semicolon > i)
+ {
+ emsg(_("E688: More targets than List items"));
+ return FAIL;
+ }
+
+ item = l->lv_first;
+ while (*arg != ']')
+ {
+ arg = skipwhite(arg + 1);
+ arg = ex_let_one(arg, &item->li_tv, TRUE, (char_u *)",;]", nextchars);
+ item = item->li_next;
+ if (arg == NULL)
+ return FAIL;
+
+ arg = skipwhite(arg);
+ if (*arg == ';')
+ {
+ /* Put the rest of the list (may be empty) in the var after ';'.
+ * Create a new list for this. */
+ l = list_alloc();
+ if (l == NULL)
+ return FAIL;
+ while (item != NULL)
+ {
+ list_append_tv(l, &item->li_tv);
+ item = item->li_next;
+ }
+
+ ltv.v_type = VAR_LIST;
+ ltv.v_lock = 0;
+ ltv.vval.v_list = l;
+ l->lv_refcount = 1;
+
+ arg = ex_let_one(skipwhite(arg + 1), &ltv, FALSE,
+ (char_u *)"]", nextchars);
+ clear_tv(&ltv);
+ if (arg == NULL)
+ return FAIL;
+ break;
+ }
+ else if (*arg != ',' && *arg != ']')
+ {
+ internal_error("ex_let_vars()");
+ return FAIL;
+ }
+ }
+
+ return OK;
+}
+
+/*
+ * Skip over assignable variable "var" or list of variables "[var, var]".
+ * Used for ":let varvar = expr" and ":for varvar in expr".
+ * For "[var, var]" increment "*var_count" for each variable.
+ * for "[var, var; var]" set "semicolon".
+ * Return NULL for an error.
+ */
+ static char_u *
+skip_var_list(
+ char_u *arg,
+ int *var_count,
+ int *semicolon)
+{
+ char_u *p, *s;
+
+ if (*arg == '[')
+ {
+ /* "[var, var]": find the matching ']'. */
+ p = arg;
+ for (;;)
+ {
+ p = skipwhite(p + 1); /* skip whites after '[', ';' or ',' */
+ s = skip_var_one(p);
+ if (s == p)
+ {
+ semsg(_(e_invarg2), p);
+ return NULL;
+ }
+ ++*var_count;
+
+ p = skipwhite(s);
+ if (*p == ']')
+ break;
+ else if (*p == ';')
+ {
+ if (*semicolon == 1)
+ {
+ emsg(_("Double ; in list of variables"));
+ return NULL;
+ }
+ *semicolon = 1;
+ }
+ else if (*p != ',')
+ {
+ semsg(_(e_invarg2), p);
+ return NULL;
+ }
+ }
+ return p + 1;
+ }
+ else
+ return skip_var_one(arg);
+}
+
+/*
+ * Skip one (assignable) variable name, including @r, $VAR, &option, d.key,
+ * l[idx].
+ */
+ static char_u *
+skip_var_one(char_u *arg)
+{
+ if (*arg == '@' && arg[1] != NUL)
+ return arg + 2;
+ return find_name_end(*arg == '$' || *arg == '&' ? arg + 1 : arg,
+ NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
+}
+
+/*
+ * List variables for hashtab "ht" with prefix "prefix".
+ * If "empty" is TRUE also list NULL strings as empty strings.
+ */
+ void
+list_hashtable_vars(
+ hashtab_T *ht,
+ char *prefix,
+ int empty,
+ int *first)
+{
+ hashitem_T *hi;
+ dictitem_T *di;
+ int todo;
+ char_u buf[IOSIZE];
+
+ todo = (int)ht->ht_used;
+ for (hi = ht->ht_array; todo > 0 && !got_int; ++hi)
+ {
+ if (!HASHITEM_EMPTY(hi))
+ {
+ --todo;
+ di = HI2DI(hi);
+
+ // apply :filter /pat/ to variable name
+ vim_strncpy((char_u *)buf, (char_u *)prefix, IOSIZE - 1);
+ vim_strcat((char_u *)buf, di->di_key, IOSIZE);
+ if (message_filtered(buf))
+ continue;
+
+ if (empty || di->di_tv.v_type != VAR_STRING
+ || di->di_tv.vval.v_string != NULL)
+ list_one_var(di, prefix, first);
+ }
+ }
+}
+
+/*
+ * List global variables.
+ */
+ static void
+list_glob_vars(int *first)
+{
+ list_hashtable_vars(&globvarht, "", TRUE, first);
+}
+
+/*
+ * List buffer variables.
+ */
+ static void
+list_buf_vars(int *first)
+{
+ list_hashtable_vars(&curbuf->b_vars->dv_hashtab, "b:", TRUE, first);
+}
+
+/*
+ * List window variables.
+ */
+ static void
+list_win_vars(int *first)
+{
+ list_hashtable_vars(&curwin->w_vars->dv_hashtab, "w:", TRUE, first);
+}
+
+/*
+ * List tab page variables.
+ */
+ static void
+list_tab_vars(int *first)
+{
+ list_hashtable_vars(&curtab->tp_vars->dv_hashtab, "t:", TRUE, first);
+}
+
+/*
+ * List Vim variables.
+ */
+ static void
+list_vim_vars(int *first)
+{
+ list_hashtable_vars(&vimvarht, "v:", FALSE, first);
+}
+
+/*
+ * List script-local variables, if there is a script.
+ */
+ static void
+list_script_vars(int *first)
+{
+ if (current_sctx.sc_sid > 0 && current_sctx.sc_sid <= ga_scripts.ga_len)
+ list_hashtable_vars(&SCRIPT_VARS(current_sctx.sc_sid),
+ "s:", FALSE, first);
+}
+
+/*
+ * List variables in "arg".
+ */
+ static char_u *
+list_arg_vars(exarg_T *eap, char_u *arg, int *first)
+{
+ int error = FALSE;
+ int len;
+ char_u *name;
+ char_u *name_start;
+ char_u *arg_subsc;
+ char_u *tofree;
+ typval_T tv;
+
+ while (!ends_excmd(*arg) && !got_int)
+ {
+ if (error || eap->skip)
+ {
+ arg = find_name_end(arg, NULL, NULL, FNE_INCL_BR | FNE_CHECK_START);
+ if (!VIM_ISWHITE(*arg) && !ends_excmd(*arg))
+ {
+ emsg_severe = TRUE;
+ emsg(_(e_trailing));
+ break;
+ }
+ }
+ else
+ {
+ /* get_name_len() takes care of expanding curly braces */
+ name_start = name = arg;
+ len = get_name_len(&arg, &tofree, TRUE, TRUE);
+ if (len <= 0)
+ {
+ /* This is mainly to keep test 49 working: when expanding
+ * curly braces fails overrule the exception error message. */
+ if (len < 0 && !aborting())
+ {
+ emsg_severe = TRUE;
+ semsg(_(e_invarg2), arg);
+ break;
+ }
+ error = TRUE;
+ }
+ else
+ {
+ if (tofree != NULL)
+ name = tofree;
+ if (get_var_tv(name, len, &tv, NULL, TRUE, FALSE) == FAIL)
+ error = TRUE;
+ else
+ {
+ /* handle d.key, l[idx], f(expr) */
+ arg_subsc = arg;
+ if (handle_subscript(&arg, &tv, TRUE, TRUE) == FAIL)
+ error = TRUE;
+ else
+ {
+ if (arg == arg_subsc && len == 2 && name[1] == ':')
+ {
+ switch (*name)
+ {
+ case 'g': list_glob_vars(first); break;
+ case 'b': list_buf_vars(first); break;
+ case 'w': list_win_vars(first); break;
+ case 't': list_tab_vars(first); break;
+ case 'v': list_vim_vars(first); break;
+ case 's': list_script_vars(first); break;
+ case 'l': list_func_vars(first); break;
+ default:
+ semsg(_("E738: Can't list variables for %s"), name);
+ }
+ }
+ else
+ {
+ char_u numbuf[NUMBUFLEN];
+ char_u *tf;
+ int c;
+ char_u *s;
+
+ s = echo_string(&tv, &tf, numbuf, 0);
+ c = *arg;
+ *arg = NUL;
+ list_one_var_a("",
+ arg == arg_subsc ? name : name_start,
+ tv.v_type,
+ s == NULL ? (char_u *)"" : s,
+ first);
+ *arg = c;
+ vim_free(tf);
+ }
+ clear_tv(&tv);
+ }
+ }
+ }
+
+ vim_free(tofree);
+ }
+
+ arg = skipwhite(arg);
+ }
+
+ return arg;
+}
+
+/*
+ * Set one item of ":let var = expr" or ":let [v1, v2] = list" to its value.
+ * Returns a pointer to the char just after the var name.
+ * Returns NULL if there is an error.
+ */
+ static char_u *
+ex_let_one(
+ char_u *arg, /* points to variable name */
+ typval_T *tv, /* value to assign to variable */
+ int copy, /* copy value from "tv" */
+ char_u *endchars, /* valid chars after variable name or NULL */
+ char_u *op) /* "+", "-", "." or NULL*/
+{
+ int c1;
+ char_u *name;
+ char_u *p;
+ char_u *arg_end = NULL;
+ int len;
+ int opt_flags;
+ char_u *tofree = NULL;
+
+ /*
+ * ":let $VAR = expr": Set environment variable.
+ */
+ if (*arg == '$')
+ {
+ /* Find the end of the name. */
+ ++arg;
+ name = arg;
+ len = get_env_len(&arg);
+ if (len == 0)
+ semsg(_(e_invarg2), name - 1);
+ else
+ {
+ if (op != NULL && (*op == '+' || *op == '-'))
+ semsg(_(e_letwrong), op);
+ else if (endchars != NULL
+ && vim_strchr(endchars, *skipwhite(arg)) == NULL)
+ emsg(_(e_letunexp));
+ else if (!check_secure())
+ {
+ c1 = name[len];
+ name[len] = NUL;
+ p = tv_get_string_chk(tv);
+ if (p != NULL && op != NULL && *op == '.')
+ {
+ int mustfree = FALSE;
+ char_u *s = vim_getenv(name, &mustfree);
+
+ if (s != NULL)
+ {
+ p = tofree = concat_str(s, p);
+ if (mustfree)
+ vim_free(s);
+ }
+ }
+ if (p != NULL)
+ {
+ vim_setenv(name, p);
+ if (STRICMP(name, "HOME") == 0)
+ init_homedir();
+ else if (didset_vim && STRICMP(name, "VIM") == 0)
+ didset_vim = FALSE;
+ else if (didset_vimruntime
+ && STRICMP(name, "VIMRUNTIME") == 0)
+ didset_vimruntime = FALSE;
+ arg_end = arg;
+ }
+ name[len] = c1;
+ vim_free(tofree);
+ }
+ }
+ }
+
+ /*
+ * ":let &option = expr": Set option value.
+ * ":let &l:option = expr": Set local option value.
+ * ":let &g:option = expr": Set global option value.
+ */
+ else if (*arg == '&')
+ {
+ /* Find the end of the name. */
+ p = find_option_end(&arg, &opt_flags);
+ if (p == NULL || (endchars != NULL
+ && vim_strchr(endchars, *skipwhite(p)) == NULL))
+ emsg(_(e_letunexp));
+ else
+ {
+ long n;
+ int opt_type;
+ long numval;
+ char_u *stringval = NULL;
+ char_u *s;
+
+ c1 = *p;
+ *p = NUL;
+
+ n = (long)tv_get_number(tv);
+ s = tv_get_string_chk(tv); /* != NULL if number or string */
+ if (s != NULL && op != NULL && *op != '=')
+ {
+ opt_type = get_option_value(arg, &numval,
+ &stringval, opt_flags);
+ if ((opt_type == 1 && *op == '.')
+ || (opt_type == 0 && *op != '.'))
+ {
+ semsg(_(e_letwrong), op);
+ s = NULL; /* don't set the value */
+ }
+ else
+ {
+ if (opt_type == 1) /* number */
+ {
+ if (*op == '+')
+ n = numval + n;
+ else
+ n = numval - n;
+ }
+ else if (opt_type == 0 && stringval != NULL) /* string */
+ {
+ s = concat_str(stringval, s);
+ vim_free(stringval);
+ stringval = s;
+ }
+ }
+ }
+ if (s != NULL)
+ {
+ set_option_value(arg, n, s, opt_flags);
+ arg_end = p;
+ }
+ *p = c1;
+ vim_free(stringval);
+ }
+ }
+
+ /*
+ * ":let @r = expr": Set register contents.
+ */
+ else if (*arg == '@')
+ {
+ ++arg;
+ if (op != NULL && (*op == '+' || *op == '-'))
+ semsg(_(e_letwrong), op);
+ else if (endchars != NULL
+ && vim_strchr(endchars, *skipwhite(arg + 1)) == NULL)
+ emsg(_(e_letunexp));
+ else
+ {
+ char_u *ptofree = NULL;
+ char_u *s;
+
+ p = tv_get_string_chk(tv);
+ if (p != NULL && op != NULL && *op == '.')
+ {
+ s = get_reg_contents(*arg == '@' ? '"' : *arg, GREG_EXPR_SRC);
+ if (s != NULL)
+ {
+ p = ptofree = concat_str(s, p);
+ vim_free(s);
+ }
+ }
+ if (p != NULL)
+ {
+ write_reg_contents(*arg == '@' ? '"' : *arg, p, -1, FALSE);
+ arg_end = arg + 1;
+ }
+ vim_free(ptofree);
+ }
+ }
+
+ /*
+ * ":let var = expr": Set internal variable.
+ * ":let {expr} = expr": Idem, name made with curly braces
+ */
+ else if (eval_isnamec1(*arg) || *arg == '{')
+ {
+ lval_T lv;
+
+ p = get_lval(arg, tv, &lv, FALSE, FALSE, 0, FNE_CHECK_START);
+ if (p != NULL && lv.ll_name != NULL)
+ {
+ if (endchars != NULL && vim_strchr(endchars, *skipwhite(p)) == NULL)
+ emsg(_(e_letunexp));
+ else
+ {
+ set_var_lval(&lv, p, tv, copy, op);
+ arg_end = p;
+ }
+ }
+ clear_lval(&lv);
+ }
+
+ else
+ semsg(_(e_invarg2), arg);
+
+ return arg_end;
+}
+
+/*
+ * Get an lval: variable, Dict item or List item that can be assigned a value
+ * to: "name", "na{me}", "name[expr]", "name[expr:expr]", "name[expr][expr]",
+ * "name.key", "name.key[expr]" etc.
+ * Indexing only works if "name" is an existing List or Dictionary.
+ * "name" points to the start of the name.
+ * If "rettv" is not NULL it points to the value to be assigned.
+ * "unlet" is TRUE for ":unlet": slightly different behavior when something is
+ * wrong; must end in space or cmd separator.
+ *
+ * flags:
+ * GLV_QUIET: do not give error messages
+ * GLV_READ_ONLY: will not change the variable
+ * GLV_NO_AUTOLOAD: do not use script autoloading
+ *
+ * Returns a pointer to just after the name, including indexes.
+ * When an evaluation error occurs "lp->ll_name" is NULL;
+ * Returns NULL for a parsing error. Still need to free items in "lp"!
+ */
+ char_u *
+get_lval(
+ char_u *name,
+ typval_T *rettv,
+ lval_T *lp,
+ int unlet,
+ int skip,
+ int flags, /* GLV_ values */
+ int fne_flags) /* flags for find_name_end() */
+{
+ char_u *p;
+ char_u *expr_start, *expr_end;
+ int cc;
+ dictitem_T *v;
+ typval_T var1;
+ typval_T var2;
+ int empty1 = FALSE;
+ listitem_T *ni;
+ char_u *key = NULL;
+ int len;
+ hashtab_T *ht;
+ int quiet = flags & GLV_QUIET;
+
+ /* Clear everything in "lp". */
+ vim_memset(lp, 0, sizeof(lval_T));
+
+ if (skip)
+ {
+ /* When skipping just find the end of the name. */
+ lp->ll_name = name;
+ return find_name_end(name, NULL, NULL, FNE_INCL_BR | fne_flags);
+ }
+
+ /* Find the end of the name. */
+ p = find_name_end(name, &expr_start, &expr_end, fne_flags);
+ if (expr_start != NULL)
+ {
+ /* Don't expand the name when we already know there is an error. */
+ if (unlet && !VIM_ISWHITE(*p) && !ends_excmd(*p)
+ && *p != '[' && *p != '.')
+ {
+ emsg(_(e_trailing));
+ return NULL;
+ }
+
+ lp->ll_exp_name = make_expanded_name(name, expr_start, expr_end, p);
+ if (lp->ll_exp_name == NULL)
+ {
+ /* Report an invalid expression in braces, unless the
+ * expression evaluation has been cancelled due to an
+ * aborting error, an interrupt, or an exception. */
+ if (!aborting() && !quiet)
+ {
+ emsg_severe = TRUE;
+ semsg(_(e_invarg2), name);
+ return NULL;
+ }
+ }
+ lp->ll_name = lp->ll_exp_name;
+ }
+ else
+ lp->ll_name = name;
+
+ /* Without [idx] or .key we are done. */
+ if ((*p != '[' && *p != '.') || lp->ll_name == NULL)
+ return p;
+
+ cc = *p;
+ *p = NUL;
+ /* Only pass &ht when we would write to the variable, it prevents autoload
+ * as well. */
+ v = find_var(lp->ll_name, (flags & GLV_READ_ONLY) ? NULL : &ht,
+ flags & GLV_NO_AUTOLOAD);
+ if (v == NULL && !quiet)
+ semsg(_(e_undefvar), lp->ll_name);
+ *p = cc;
+ if (v == NULL)
+ return NULL;
+
+ /*
+ * Loop until no more [idx] or .key is following.
+ */
+ lp->ll_tv = &v->di_tv;
+ var1.v_type = VAR_UNKNOWN;
+ var2.v_type = VAR_UNKNOWN;
+ while (*p == '[' || (*p == '.' && lp->ll_tv->v_type == VAR_DICT))
+ {
+ if (!(lp->ll_tv->v_type == VAR_LIST && lp->ll_tv->vval.v_list != NULL)
+ && !(lp->ll_tv->v_type == VAR_DICT
+ && lp->ll_tv->vval.v_dict != NULL)
+ && !(lp->ll_tv->v_type == VAR_BLOB
+ && lp->ll_tv->vval.v_blob != NULL))
+ {
+ if (!quiet)
+ emsg(_("E689: Can only index a List, Dictionary or Blob"));
+ return NULL;
+ }
+ if (lp->ll_range)
+ {
+ if (!quiet)
+ emsg(_("E708: [:] must come last"));
+ return NULL;
+ }
+
+ len = -1;
+ if (*p == '.')
+ {
+ key = p + 1;
+ for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
+ ;
+ if (len == 0)
+ {
+ if (!quiet)
+ emsg(_(e_emptykey));
+ return NULL;
+ }
+ p = key + len;
+ }
+ else
+ {
+ /* Get the index [expr] or the first index [expr: ]. */
+ p = skipwhite(p + 1);
+ if (*p == ':')
+ empty1 = TRUE;
+ else
+ {
+ empty1 = FALSE;
+ if (eval1(&p, &var1, TRUE) == FAIL) /* recursive! */
+ return NULL;
+ if (tv_get_string_chk(&var1) == NULL)
+ {
+ /* not a number or string */
+ clear_tv(&var1);
+ return NULL;
+ }
+ }
+
+ /* Optionally get the second index [ :expr]. */
+ if (*p == ':')
+ {
+ if (lp->ll_tv->v_type == VAR_DICT)
+ {
+ if (!quiet)
+ emsg(_(e_dictrange));
+ clear_tv(&var1);
+ return NULL;
+ }
+ if (rettv != NULL
+ && !(rettv->v_type == VAR_LIST
+ && rettv->vval.v_list != NULL)
+ && !(rettv->v_type == VAR_BLOB
+ && rettv->vval.v_blob != NULL))
+ {
+ if (!quiet)
+ emsg(_("E709: [:] requires a List or Blob value"));
+ clear_tv(&var1);
+ return NULL;
+ }
+ p = skipwhite(p + 1);
+ if (*p == ']')
+ lp->ll_empty2 = TRUE;
+ else
+ {
+ lp->ll_empty2 = FALSE;
+ if (eval1(&p, &var2, TRUE) == FAIL) /* recursive! */
+ {
+ clear_tv(&var1);
+ return NULL;
+ }
+ if (tv_get_string_chk(&var2) == NULL)
+ {
+ /* not a number or string */
+ clear_tv(&var1);
+ clear_tv(&var2);
+ return NULL;
+ }
+ }
+ lp->ll_range = TRUE;
+ }
+ else
+ lp->ll_range = FALSE;
+
+ if (*p != ']')
+ {
+ if (!quiet)
+ emsg(_(e_missbrac));
+ clear_tv(&var1);
+ clear_tv(&var2);
+ return NULL;
+ }
+
+ /* Skip to past ']'. */
+ ++p;
+ }
+
+ if (lp->ll_tv->v_type == VAR_DICT)
+ {
+ if (len == -1)
+ {
+ /* "[key]": get key from "var1" */
+ key = tv_get_string_chk(&var1); /* is number or string */
+ if (key == NULL)
+ {
+ clear_tv(&var1);
+ return NULL;
+ }
+ }
+ lp->ll_list = NULL;
+ lp->ll_dict = lp->ll_tv->vval.v_dict;
+ lp->ll_di = dict_find(lp->ll_dict, key, len);
+
+ /* When assigning to a scope dictionary check that a function and
+ * variable name is valid (only variable name unless it is l: or
+ * g: dictionary). Disallow overwriting a builtin function. */
+ if (rettv != NULL && lp->ll_dict->dv_scope != 0)
+ {
+ int prevval;
+ int wrong;
+
+ if (len != -1)
+ {
+ prevval = key[len];
+ key[len] = NUL;
+ }
+ else
+ prevval = 0; /* avoid compiler warning */
+ wrong = (lp->ll_dict->dv_scope == VAR_DEF_SCOPE
+ && rettv->v_type == VAR_FUNC
+ && var_check_func_name(key, lp->ll_di == NULL))
+ || !valid_varname(key);
+ if (len != -1)
+ key[len] = prevval;
+ if (wrong)
+ return NULL;
+ }
+
+ if (lp->ll_di == NULL)
+ {
+ /* Can't add "v:" variable. */
+ if (lp->ll_dict == &vimvardict)
+ {
+ semsg(_(e_illvar), name);
+ return NULL;
+ }
+
+ /* Key does not exist in dict: may need to add it. */
+ if (*p == '[' || *p == '.' || unlet)
+ {
+ if (!quiet)
+ semsg(_(e_dictkey), key);
+ clear_tv(&var1);
+ return NULL;
+ }
+ if (len == -1)
+ lp->ll_newkey = vim_strsave(key);
+ else
+ lp->ll_newkey = vim_strnsave(key, len);
+ clear_tv(&var1);
+ if (lp->ll_newkey == NULL)
+ p = NULL;
+ break;
+ }
+ /* existing variable, need to check if it can be changed */
+ else if ((flags & GLV_READ_ONLY) == 0
+ && var_check_ro(lp->ll_di->di_flags, name, FALSE))
+ {
+ clear_tv(&var1);
+ return NULL;
+ }
+
+ clear_tv(&var1);
+ lp->ll_tv = &lp->ll_di->di_tv;
+ }
+ else if (lp->ll_tv->v_type == VAR_BLOB)
+ {
+ long bloblen = blob_len(lp->ll_tv->vval.v_blob);
+
+ /*
+ * Get the number and item for the only or first index of the List.
+ */
+ if (empty1)
+ lp->ll_n1 = 0;
+ else
+ // is number or string
+ lp->ll_n1 = (long)tv_get_number(&var1);
+ clear_tv(&var1);
+
+ if (lp->ll_n1 < 0
+ || lp->ll_n1 > bloblen
+ || (lp->ll_range && lp->ll_n1 == bloblen))
+ {
+ if (!quiet)
+ semsg(_(e_blobidx), lp->ll_n1);
+ clear_tv(&var2);
+ return NULL;
+ }
+ if (lp->ll_range && !lp->ll_empty2)
+ {
+ lp->ll_n2 = (long)tv_get_number(&var2);
+ clear_tv(&var2);
+ if (lp->ll_n2 < 0
+ || lp->ll_n2 >= bloblen
+ || lp->ll_n2 < lp->ll_n1)
+ {
+ if (!quiet)
+ semsg(_(e_blobidx), lp->ll_n2);
+ return NULL;
+ }
+ }
+ lp->ll_blob = lp->ll_tv->vval.v_blob;
+ lp->ll_tv = NULL;
+ }
+ else
+ {
+ /*
+ * Get the number and item for the only or first index of the List.
+ */
+ if (empty1)
+ lp->ll_n1 = 0;
+ else
+ /* is number or string */
+ lp->ll_n1 = (long)tv_get_number(&var1);
+ clear_tv(&var1);
+
+ lp->ll_dict = NULL;
+ lp->ll_list = lp->ll_tv->vval.v_list;
+ lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
+ if (lp->ll_li == NULL)
+ {
+ if (lp->ll_n1 < 0)
+ {
+ lp->ll_n1 = 0;
+ lp->ll_li = list_find(lp->ll_list, lp->ll_n1);
+ }
+ }
+ if (lp->ll_li == NULL)
+ {
+ clear_tv(&var2);
+ if (!quiet)
+ semsg(_(e_listidx), lp->ll_n1);
+ return NULL;
+ }
+
+ /*
+ * May need to find the item or absolute index for the second
+ * index of a range.
+ * When no index given: "lp->ll_empty2" is TRUE.
+ * Otherwise "lp->ll_n2" is set to the second index.
+ */
+ if (lp->ll_range && !lp->ll_empty2)
+ {
+ lp->ll_n2 = (long)tv_get_number(&var2);
+ /* is number or string */
+ clear_tv(&var2);
+ if (lp->ll_n2 < 0)
+ {
+ ni = list_find(lp->ll_list, lp->ll_n2);
+ if (ni == NULL)
+ {
+ if (!quiet)
+ semsg(_(e_listidx), lp->ll_n2);
+ return NULL;
+ }
+ lp->ll_n2 = list_idx_of_item(lp->ll_list, ni);
+ }
+
+ /* Check that lp->ll_n2 isn't before lp->ll_n1. */
+ if (lp->ll_n1 < 0)
+ lp->ll_n1 = list_idx_of_item(lp->ll_list, lp->ll_li);
+ if (lp->ll_n2 < lp->ll_n1)
+ {
+ if (!quiet)
+ semsg(_(e_listidx), lp->ll_n2);
+ return NULL;
+ }
+ }
+
+ lp->ll_tv = &lp->ll_li->li_tv;
+ }
+ }
+
+ clear_tv(&var1);
+ return p;
+}
+
+/*
+ * Clear lval "lp" that was filled by get_lval().
+ */
+ void
+clear_lval(lval_T *lp)
+{
+ vim_free(lp->ll_exp_name);
+ vim_free(lp->ll_newkey);
+}
+
+/*
+ * Set a variable that was parsed by get_lval() to "rettv".
+ * "endp" points to just after the parsed name.
+ * "op" is NULL, "+" for "+=", "-" for "-=", "." for ".=" or "=" for "=".
+ */
+ static void
+set_var_lval(
+ lval_T *lp,
+ char_u *endp,
+ typval_T *rettv,
+ int copy,
+ char_u *op)
+{
+ int cc;
+ listitem_T *ri;
+ dictitem_T *di;
+
+ if (lp->ll_tv == NULL)
+ {
+ cc = *endp;
+ *endp = NUL;
+ if (lp->ll_blob != NULL)
+ {
+ int error = FALSE, val;
+
+ if (op != NULL && *op != '=')
+ {
+ semsg(_(e_letwrong), op);
+ return;
+ }
+
+ if (lp->ll_range && rettv->v_type == VAR_BLOB)
+ {
+ int il, ir;
+
+ if (lp->ll_empty2)
+ lp->ll_n2 = blob_len(lp->ll_blob) - 1;
+
+ if (lp->ll_n2 - lp->ll_n1 + 1 != blob_len(rettv->vval.v_blob))
+ {
+ emsg(_("E972: Blob value does not have the right number of bytes"));
+ return;
+ }
+ if (lp->ll_empty2)
+ lp->ll_n2 = blob_len(lp->ll_blob);
+
+ ir = 0;
+ for (il = lp->ll_n1; il <= lp->ll_n2; il++)
+ blob_set(lp->ll_blob, il,
+ blob_get(rettv->vval.v_blob, ir++));
+ }
+ else
+ {
+ val = (int)tv_get_number_chk(rettv, &error);
+ if (!error)
+ {
+ garray_T *gap = &lp->ll_blob->bv_ga;
+
+ // Allow for appending a byte. Setting a byte beyond
+ // the end is an error otherwise.
+ if (lp->ll_n1 < gap->ga_len
+ || (lp->ll_n1 == gap->ga_len
+ && ga_grow(&lp->ll_blob->bv_ga, 1) == OK))
+ {
+ blob_set(lp->ll_blob, lp->ll_n1, val);
+ if (lp->ll_n1 == gap->ga_len)
+ ++gap->ga_len;
+ }
+ // error for invalid range was already given in get_lval()
+ }
+ }
+ }
+ else if (op != NULL && *op != '=')
+ {
+ typval_T tv;
+
+ /* handle +=, -= and .= */
+ di = NULL;
+ if (get_var_tv(lp->ll_name, (int)STRLEN(lp->ll_name),
+ &tv, &di, TRUE, FALSE) == OK)
+ {
+ if ((di == NULL
+ || (!var_check_ro(di->di_flags, lp->ll_name, FALSE)
+ && !tv_check_lock(di->di_tv.v_lock, lp->ll_name,
+ FALSE)))
+ && tv_op(&tv, rettv, op) == OK)
+ set_var(lp->ll_name, &tv, FALSE);
+ clear_tv(&tv);
+ }
+ }
+ else
+ set_var(lp->ll_name, rettv, copy);
+ *endp = cc;
+ }
+ else if (tv_check_lock(lp->ll_newkey == NULL
+ ? lp->ll_tv->v_lock
+ : lp->ll_tv->vval.v_dict->dv_lock, lp->ll_name, FALSE))
+ ;
+ else if (lp->ll_range)
+ {
+ listitem_T *ll_li = lp->ll_li;
+ int ll_n1 = lp->ll_n1;
+
+ /*
+ * Check whether any of the list items is locked
+ */
+ for (ri = rettv->vval.v_list->lv_first; ri != NULL && ll_li != NULL; )
+ {
+ if (tv_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE))
+ return;
+ ri = ri->li_next;
+ if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == ll_n1))
+ break;
+ ll_li = ll_li->li_next;
+ ++ll_n1;
+ }
+
+ /*
+ * Assign the List values to the list items.
+ */
+ for (ri = rettv->vval.v_list->lv_first; ri != NULL; )
+ {
+ if (op != NULL && *op != '=')
+ tv_op(&lp->ll_li->li_tv, &ri->li_tv, op);
+ else
+ {
+ clear_tv(&lp->ll_li->li_tv);
+ copy_tv(&ri->li_tv, &lp->ll_li->li_tv);
+ }
+ ri = ri->li_next;
+ if (ri == NULL || (!lp->ll_empty2 && lp->ll_n2 == lp->ll_n1))
+ break;
+ if (lp->ll_li->li_next == NULL)
+ {
+ /* Need to add an empty item. */
+ if (list_append_number(lp->ll_list, 0) == FAIL)
+ {
+ ri = NULL;
+ break;
+ }
+ }
+ lp->ll_li = lp->ll_li->li_next;
+ ++lp->ll_n1;
+ }
+ if (ri != NULL)
+ emsg(_("E710: List value has more items than target"));
+ else if (lp->ll_empty2
+ ? (lp->ll_li != NULL && lp->ll_li->li_next != NULL)
+ : lp->ll_n1 != lp->ll_n2)
+ emsg(_("E711: List value has not enough items"));
+ }
+ else
+ {
+ /*
+ * Assign to a List or Dictionary item.
+ */
+ if (lp->ll_newkey != NULL)
+ {
+ if (op != NULL && *op != '=')
+ {
+ semsg(_(e_letwrong), op);
+ return;
+ }
+
+ /* Need to add an item to the Dictionary. */
+ di = dictitem_alloc(lp->ll_newkey);
+ if (di == NULL)
+ return;
+ if (dict_add(lp->ll_tv->vval.v_dict, di) == FAIL)
+ {
+ vim_free(di);
+ return;
+ }
+ lp->ll_tv = &di->di_tv;
+ }
+ else if (op != NULL && *op != '=')
+ {
+ tv_op(lp->ll_tv, rettv, op);
+ return;
+ }
+ else
+ clear_tv(lp->ll_tv);
+
+ /*
+ * Assign the value to the variable or list item.
+ */
+ if (copy)
+ copy_tv(rettv, lp->ll_tv);
+ else
+ {
+ *lp->ll_tv = *rettv;
+ lp->ll_tv->v_lock = 0;
+ init_tv(rettv);
+ }
+ }
+}
+
+/*
+ * Handle "tv1 += tv2", "tv1 -= tv2" and "tv1 .= tv2"
+ * Returns OK or FAIL.
+ */
+ static int
+tv_op(typval_T *tv1, typval_T *tv2, char_u *op)
+{
+ varnumber_T n;
+ char_u numbuf[NUMBUFLEN];
+ char_u *s;
+
+ /* Can't do anything with a Funcref, Dict, v:true on the right. */
+ if (tv2->v_type != VAR_FUNC && tv2->v_type != VAR_DICT
+ && tv2->v_type != VAR_SPECIAL)
+ {
+ switch (tv1->v_type)
+ {
+ case VAR_UNKNOWN:
+ case VAR_DICT:
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ case VAR_SPECIAL:
+ case VAR_JOB:
+ case VAR_CHANNEL:
+ break;
+
+ case VAR_BLOB:
+ if (*op != '+' || tv2->v_type != VAR_BLOB)
+ break;
+ // BLOB += BLOB
+ if (tv1->vval.v_blob != NULL && tv2->vval.v_blob != NULL)
+ {
+ blob_T *b1 = tv1->vval.v_blob;
+ blob_T *b2 = tv2->vval.v_blob;
+ int i, len = blob_len(b2);
+ for (i = 0; i < len; i++)
+ ga_append(&b1->bv_ga, blob_get(b2, i));
+ }
+ return OK;
+
+ case VAR_LIST:
+ if (*op != '+' || tv2->v_type != VAR_LIST)
+ break;
+ /* List += List */
+ if (tv1->vval.v_list != NULL && tv2->vval.v_list != NULL)
+ list_extend(tv1->vval.v_list, tv2->vval.v_list, NULL);
+ return OK;
+
+ case VAR_NUMBER:
+ case VAR_STRING:
+ if (tv2->v_type == VAR_LIST)
+ break;
+ if (*op == '+' || *op == '-')
+ {
+ /* nr += nr or nr -= nr*/
+ n = tv_get_number(tv1);
+#ifdef FEAT_FLOAT
+ if (tv2->v_type == VAR_FLOAT)
+ {
+ float_T f = n;
+
+ if (*op == '+')
+ f += tv2->vval.v_float;
+ else
+ f -= tv2->vval.v_float;
+ clear_tv(tv1);
+ tv1->v_type = VAR_FLOAT;
+ tv1->vval.v_float = f;
+ }
+ else
+#endif
+ {
+ if (*op == '+')
+ n += tv_get_number(tv2);
+ else
+ n -= tv_get_number(tv2);
+ clear_tv(tv1);
+ tv1->v_type = VAR_NUMBER;
+ tv1->vval.v_number = n;
+ }
+ }
+ else
+ {
+ if (tv2->v_type == VAR_FLOAT)
+ break;
+
+ /* str .= str */
+ s = tv_get_string(tv1);
+ s = concat_str(s, tv_get_string_buf(tv2, numbuf));
+ clear_tv(tv1);
+ tv1->v_type = VAR_STRING;
+ tv1->vval.v_string = s;
+ }
+ return OK;
+
+ case VAR_FLOAT:
+#ifdef FEAT_FLOAT
+ {
+ float_T f;
+
+ if (*op == '.' || (tv2->v_type != VAR_FLOAT
+ && tv2->v_type != VAR_NUMBER
+ && tv2->v_type != VAR_STRING))
+ break;
+ if (tv2->v_type == VAR_FLOAT)
+ f = tv2->vval.v_float;
+ else
+ f = tv_get_number(tv2);
+ if (*op == '+')
+ tv1->vval.v_float += f;
+ else
+ tv1->vval.v_float -= f;
+ }
+#endif
+ return OK;
+ }
+ }
+
+ semsg(_(e_letwrong), op);
+ return FAIL;
+}
+
+/*
+ * Evaluate the expression used in a ":for var in expr" command.
+ * "arg" points to "var".
+ * Set "*errp" to TRUE for an error, FALSE otherwise;
+ * Return a pointer that holds the info. Null when there is an error.
+ */
+ void *
+eval_for_line(
+ char_u *arg,
+ int *errp,
+ char_u **nextcmdp,
+ int skip)
+{
+ forinfo_T *fi;
+ char_u *expr;
+ typval_T tv;
+ list_T *l;
+
+ *errp = TRUE; /* default: there is an error */
+
+ fi = (forinfo_T *)alloc_clear(sizeof(forinfo_T));
+ if (fi == NULL)
+ return NULL;
+
+ expr = skip_var_list(arg, &fi->fi_varcount, &fi->fi_semicolon);
+ if (expr == NULL)
+ return fi;
+
+ expr = skipwhite(expr);
+ if (expr[0] != 'i' || expr[1] != 'n' || !VIM_ISWHITE(expr[2]))
+ {
+ emsg(_("E690: Missing \"in\" after :for"));
+ return fi;
+ }
+
+ if (skip)
+ ++emsg_skip;
+ if (eval0(skipwhite(expr + 2), &tv, nextcmdp, !skip) == OK)
+ {
+ *errp = FALSE;
+ if (!skip)
+ {
+ if (tv.v_type == VAR_LIST)
+ {
+ l = tv.vval.v_list;
+ if (l == NULL)
+ {
+ // a null list is like an empty list: do nothing
+ clear_tv(&tv);
+ }
+ else
+ {
+ // No need to increment the refcount, it's already set for
+ // the list being used in "tv".
+ fi->fi_list = l;
+ list_add_watch(l, &fi->fi_lw);
+ fi->fi_lw.lw_item = l->lv_first;
+ }
+ }
+ else if (tv.v_type == VAR_BLOB)
+ {
+ fi->fi_bi = 0;
+ if (tv.vval.v_blob != NULL)
+ {
+ typval_T btv;
+
+ // Make a copy, so that the iteration still works when the
+ // blob is changed.
+ blob_copy(&tv, &btv);
+ fi->fi_blob = btv.vval.v_blob;
+ }
+ clear_tv(&tv);
+ }
+ else
+ {
+ emsg(_(e_listreq));
+ clear_tv(&tv);
+ }
+ }
+ }
+ if (skip)
+ --emsg_skip;
+
+ return fi;
+}
+
+/*
+ * Use the first item in a ":for" list. Advance to the next.
+ * Assign the values to the variable (list). "arg" points to the first one.
+ * Return TRUE when a valid item was found, FALSE when at end of list or
+ * something wrong.
+ */
+ int
+next_for_item(void *fi_void, char_u *arg)
+{
+ forinfo_T *fi = (forinfo_T *)fi_void;
+ int result;
+ listitem_T *item;
+
+ if (fi->fi_blob != NULL)
+ {
+ typval_T tv;
+
+ if (fi->fi_bi >= blob_len(fi->fi_blob))
+ return FALSE;
+ tv.v_type = VAR_NUMBER;
+ tv.v_lock = VAR_FIXED;
+ tv.vval.v_number = blob_get(fi->fi_blob, fi->fi_bi);
+ ++fi->fi_bi;
+ return ex_let_vars(arg, &tv, TRUE,
+ fi->fi_semicolon, fi->fi_varcount, NULL) == OK;
+ }
+
+ item = fi->fi_lw.lw_item;
+ if (item == NULL)
+ result = FALSE;
+ else
+ {
+ fi->fi_lw.lw_item = item->li_next;
+ result = (ex_let_vars(arg, &item->li_tv, TRUE,
+ fi->fi_semicolon, fi->fi_varcount, NULL) == OK);
+ }
+ return result;
+}
+
+/*
+ * Free the structure used to store info used by ":for".
+ */
+ void
+free_for_info(void *fi_void)
+{
+ forinfo_T *fi = (forinfo_T *)fi_void;
+
+ if (fi != NULL && fi->fi_list != NULL)
+ {
+ list_rem_watch(fi->fi_list, &fi->fi_lw);
+ list_unref(fi->fi_list);
+ }
+ if (fi != NULL && fi->fi_blob != NULL)
+ blob_unref(fi->fi_blob);
+ vim_free(fi);
+}
+
+#if defined(FEAT_CMDL_COMPL) || defined(PROTO)
+
+ void
+set_context_for_expression(
+ expand_T *xp,
+ char_u *arg,
+ cmdidx_T cmdidx)
+{
+ int got_eq = FALSE;
+ int c;
+ char_u *p;
+
+ if (cmdidx == CMD_let)
+ {
+ xp->xp_context = EXPAND_USER_VARS;
+ if (vim_strpbrk(arg, (char_u *)"\"'+-*/%.=!?~|&$([<>,#") == NULL)
+ {
+ /* ":let var1 var2 ...": find last space. */
+ for (p = arg + STRLEN(arg); p >= arg; )
+ {
+ xp->xp_pattern = p;
+ MB_PTR_BACK(arg, p);
+ if (VIM_ISWHITE(*p))
+ break;
+ }
+ return;
+ }
+ }
+ else
+ xp->xp_context = cmdidx == CMD_call ? EXPAND_FUNCTIONS
+ : EXPAND_EXPRESSION;
+ while ((xp->xp_pattern = vim_strpbrk(arg,
+ (char_u *)"\"'+-*/%.=!?~|&$([<>,#")) != NULL)
+ {
+ c = *xp->xp_pattern;
+ if (c == '&')
+ {
+ c = xp->xp_pattern[1];
+ if (c == '&')
+ {
+ ++xp->xp_pattern;
+ xp->xp_context = cmdidx != CMD_let || got_eq
+ ? EXPAND_EXPRESSION : EXPAND_NOTHING;
+ }
+ else if (c != ' ')
+ {
+ xp->xp_context = EXPAND_SETTINGS;
+ if ((c == 'l' || c == 'g') && xp->xp_pattern[2] == ':')
+ xp->xp_pattern += 2;
+
+ }
+ }
+ else if (c == '$')
+ {
+ /* environment variable */
+ xp->xp_context = EXPAND_ENV_VARS;
+ }
+ else if (c == '=')
+ {
+ got_eq = TRUE;
+ xp->xp_context = EXPAND_EXPRESSION;
+ }
+ else if (c == '#'
+ && xp->xp_context == EXPAND_EXPRESSION)
+ {
+ /* Autoload function/variable contains '#'. */
+ break;
+ }
+ else if ((c == '<' || c == '#')
+ && xp->xp_context == EXPAND_FUNCTIONS
+ && vim_strchr(xp->xp_pattern, '(') == NULL)
+ {
+ /* Function name can start with "<SNR>" and contain '#'. */
+ break;
+ }
+ else if (cmdidx != CMD_let || got_eq)
+ {
+ if (c == '"') /* string */
+ {
+ while ((c = *++xp->xp_pattern) != NUL && c != '"')
+ if (c == '\\' && xp->xp_pattern[1] != NUL)
+ ++xp->xp_pattern;
+ xp->xp_context = EXPAND_NOTHING;
+ }
+ else if (c == '\'') /* literal string */
+ {
+ /* Trick: '' is like stopping and starting a literal string. */
+ while ((c = *++xp->xp_pattern) != NUL && c != '\'')
+ /* skip */ ;
+ xp->xp_context = EXPAND_NOTHING;
+ }
+ else if (c == '|')
+ {
+ if (xp->xp_pattern[1] == '|')
+ {
+ ++xp->xp_pattern;
+ xp->xp_context = EXPAND_EXPRESSION;
+ }
+ else
+ xp->xp_context = EXPAND_COMMANDS;
+ }
+ else
+ xp->xp_context = EXPAND_EXPRESSION;
+ }
+ else
+ /* Doesn't look like something valid, expand as an expression
+ * anyway. */
+ xp->xp_context = EXPAND_EXPRESSION;
+ arg = xp->xp_pattern;
+ if (*arg != NUL)
+ while ((c = *++arg) != NUL && (c == ' ' || c == '\t'))
+ /* skip */ ;
+ }
+ xp->xp_pattern = arg;
+}
+
+#endif /* FEAT_CMDL_COMPL */
+
+/*
+ * ":unlet[!] var1 ... " command.
+ */
+ void
+ex_unlet(exarg_T *eap)
+{
+ ex_unletlock(eap, eap->arg, 0);
+}
+
+/*
+ * ":lockvar" and ":unlockvar" commands
+ */
+ void
+ex_lockvar(exarg_T *eap)
+{
+ char_u *arg = eap->arg;
+ int deep = 2;
+
+ if (eap->forceit)
+ deep = -1;
+ else if (vim_isdigit(*arg))
+ {
+ deep = getdigits(&arg);
+ arg = skipwhite(arg);
+ }
+
+ ex_unletlock(eap, arg, deep);
+}
+
+/*
+ * ":unlet", ":lockvar" and ":unlockvar" are quite similar.
+ */
+ static void
+ex_unletlock(
+ exarg_T *eap,
+ char_u *argstart,
+ int deep)
+{
+ char_u *arg = argstart;
+ char_u *name_end;
+ int error = FALSE;
+ lval_T lv;
+
+ do
+ {
+ if (*arg == '$')
+ {
+ char_u *name = ++arg;
+
+ if (get_env_len(&arg) == 0)
+ {
+ semsg(_(e_invarg2), name - 1);
+ return;
+ }
+ vim_unsetenv(name);
+ arg = skipwhite(arg);
+ continue;
+ }
+
+ /* Parse the name and find the end. */
+ name_end = get_lval(arg, NULL, &lv, TRUE, eap->skip || error, 0,
+ FNE_CHECK_START);
+ if (lv.ll_name == NULL)
+ error = TRUE; /* error but continue parsing */
+ if (name_end == NULL || (!VIM_ISWHITE(*name_end)
+ && !ends_excmd(*name_end)))
+ {
+ if (name_end != NULL)
+ {
+ emsg_severe = TRUE;
+ emsg(_(e_trailing));
+ }
+ if (!(eap->skip || error))
+ clear_lval(&lv);
+ break;
+ }
+
+ if (!error && !eap->skip)
+ {
+ if (eap->cmdidx == CMD_unlet)
+ {
+ if (do_unlet_var(&lv, name_end, eap->forceit) == FAIL)
+ error = TRUE;
+ }
+ else
+ {
+ if (do_lock_var(&lv, name_end, deep,
+ eap->cmdidx == CMD_lockvar) == FAIL)
+ error = TRUE;
+ }
+ }
+
+ if (!eap->skip)
+ clear_lval(&lv);
+
+ arg = skipwhite(name_end);
+ } while (!ends_excmd(*arg));
+
+ eap->nextcmd = check_nextcmd(arg);
+}
+
+ static int
+do_unlet_var(
+ lval_T *lp,
+ char_u *name_end,
+ int forceit)
+{
+ int ret = OK;
+ int cc;
+
+ if (lp->ll_tv == NULL)
+ {
+ cc = *name_end;
+ *name_end = NUL;
+
+ /* Normal name or expanded name. */
+ if (do_unlet(lp->ll_name, forceit) == FAIL)
+ ret = FAIL;
+ *name_end = cc;
+ }
+ else if ((lp->ll_list != NULL
+ && tv_check_lock(lp->ll_list->lv_lock, lp->ll_name, FALSE))
+ || (lp->ll_dict != NULL
+ && tv_check_lock(lp->ll_dict->dv_lock, lp->ll_name, FALSE)))
+ return FAIL;
+ else if (lp->ll_range)
+ {
+ listitem_T *li;
+ listitem_T *ll_li = lp->ll_li;
+ int ll_n1 = lp->ll_n1;
+
+ while (ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= ll_n1))
+ {
+ li = ll_li->li_next;
+ if (tv_check_lock(ll_li->li_tv.v_lock, lp->ll_name, FALSE))
+ return FAIL;
+ ll_li = li;
+ ++ll_n1;
+ }
+
+ /* Delete a range of List items. */
+ while (lp->ll_li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
+ {
+ li = lp->ll_li->li_next;
+ listitem_remove(lp->ll_list, lp->ll_li);
+ lp->ll_li = li;
+ ++lp->ll_n1;
+ }
+ }
+ else
+ {
+ if (lp->ll_list != NULL)
+ /* unlet a List item. */
+ listitem_remove(lp->ll_list, lp->ll_li);
+ else
+ /* unlet a Dictionary item. */
+ dictitem_remove(lp->ll_dict, lp->ll_di);
+ }
+
+ return ret;
+}
+
+/*
+ * "unlet" a variable. Return OK if it existed, FAIL if not.
+ * When "forceit" is TRUE don't complain if the variable doesn't exist.
+ */
+ int
+do_unlet(char_u *name, int forceit)
+{
+ hashtab_T *ht;
+ hashitem_T *hi;
+ char_u *varname;
+ dict_T *d;
+ dictitem_T *di;
+
+ ht = find_var_ht(name, &varname);
+ if (ht != NULL && *varname != NUL)
+ {
+ d = get_current_funccal_dict(ht);
+ if (d == NULL)
+ {
+ if (ht == &globvarht)
+ d = &globvardict;
+ else if (ht == &compat_hashtab)
+ d = &vimvardict;
+ else
+ {
+ di = find_var_in_ht(ht, *name, (char_u *)"", FALSE);
+ d = di == NULL ? NULL : di->di_tv.vval.v_dict;
+ }
+ if (d == NULL)
+ {
+ internal_error("do_unlet()");
+ return FAIL;
+ }
+ }
+ hi = hash_find(ht, varname);
+ if (HASHITEM_EMPTY(hi))
+ hi = find_hi_in_scoped_ht(name, &ht);
+ if (hi != NULL && !HASHITEM_EMPTY(hi))
+ {
+ di = HI2DI(hi);
+ if (var_check_fixed(di->di_flags, name, FALSE)
+ || var_check_ro(di->di_flags, name, FALSE)
+ || tv_check_lock(d->dv_lock, name, FALSE))
+ return FAIL;
+
+ delete_var(ht, hi);
+ return OK;
+ }
+ }
+ if (forceit)
+ return OK;
+ semsg(_("E108: No such variable: \"%s\""), name);
+ return FAIL;
+}
+
+/*
+ * Lock or unlock variable indicated by "lp".
+ * "deep" is the levels to go (-1 for unlimited);
+ * "lock" is TRUE for ":lockvar", FALSE for ":unlockvar".
+ */
+ static int
+do_lock_var(
+ lval_T *lp,
+ char_u *name_end,
+ int deep,
+ int lock)
+{
+ int ret = OK;
+ int cc;
+ dictitem_T *di;
+
+ if (deep == 0) /* nothing to do */
+ return OK;
+
+ if (lp->ll_tv == NULL)
+ {
+ cc = *name_end;
+ *name_end = NUL;
+
+ /* Normal name or expanded name. */
+ di = find_var(lp->ll_name, NULL, TRUE);
+ if (di == NULL)
+ ret = FAIL;
+ else if ((di->di_flags & DI_FLAGS_FIX)
+ && di->di_tv.v_type != VAR_DICT
+ && di->di_tv.v_type != VAR_LIST)
+ /* For historic reasons this error is not given for a list or dict.
+ * E.g., the b: dict could be locked/unlocked. */
+ semsg(_("E940: Cannot lock or unlock variable %s"), lp->ll_name);
+ else
+ {
+ if (lock)
+ di->di_flags |= DI_FLAGS_LOCK;
+ else
+ di->di_flags &= ~DI_FLAGS_LOCK;
+ item_lock(&di->di_tv, deep, lock);
+ }
+ *name_end = cc;
+ }
+ else if (lp->ll_range)
+ {
+ listitem_T *li = lp->ll_li;
+
+ /* (un)lock a range of List items. */
+ while (li != NULL && (lp->ll_empty2 || lp->ll_n2 >= lp->ll_n1))
+ {
+ item_lock(&li->li_tv, deep, lock);
+ li = li->li_next;
+ ++lp->ll_n1;
+ }
+ }
+ else if (lp->ll_list != NULL)
+ /* (un)lock a List item. */
+ item_lock(&lp->ll_li->li_tv, deep, lock);
+ else
+ /* (un)lock a Dictionary item. */
+ item_lock(&lp->ll_di->di_tv, deep, lock);
+
+ return ret;
+}
+
+/*
+ * Lock or unlock an item. "deep" is nr of levels to go.
+ */
+ static void
+item_lock(typval_T *tv, int deep, int lock)
+{
+ static int recurse = 0;
+ list_T *l;
+ listitem_T *li;
+ dict_T *d;
+ blob_T *b;
+ hashitem_T *hi;
+ int todo;
+
+ if (recurse >= DICT_MAXNEST)
+ {
+ emsg(_("E743: variable nested too deep for (un)lock"));
+ return;
+ }
+ if (deep == 0)
+ return;
+ ++recurse;
+
+ /* lock/unlock the item itself */
+ if (lock)
+ tv->v_lock |= VAR_LOCKED;
+ else
+ tv->v_lock &= ~VAR_LOCKED;
+
+ switch (tv->v_type)
+ {
+ case VAR_UNKNOWN:
+ case VAR_NUMBER:
+ case VAR_STRING:
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ case VAR_FLOAT:
+ case VAR_SPECIAL:
+ case VAR_JOB:
+ case VAR_CHANNEL:
+ break;
+
+ case VAR_BLOB:
+ if ((b = tv->vval.v_blob) != NULL)
+ {
+ if (lock)
+ b->bv_lock |= VAR_LOCKED;
+ else
+ b->bv_lock &= ~VAR_LOCKED;
+ }
+ break;
+ case VAR_LIST:
+ if ((l = tv->vval.v_list) != NULL)
+ {
+ if (lock)
+ l->lv_lock |= VAR_LOCKED;
+ else
+ l->lv_lock &= ~VAR_LOCKED;
+ if (deep < 0 || deep > 1)
+ /* recursive: lock/unlock the items the List contains */
+ for (li = l->lv_first; li != NULL; li = li->li_next)
+ item_lock(&li->li_tv, deep - 1, lock);
+ }
+ break;
+ case VAR_DICT:
+ if ((d = tv->vval.v_dict) != NULL)
+ {
+ if (lock)
+ d->dv_lock |= VAR_LOCKED;
+ else
+ d->dv_lock &= ~VAR_LOCKED;
+ if (deep < 0 || deep > 1)
+ {
+ /* recursive: lock/unlock the items the List contains */
+ todo = (int)d->dv_hashtab.ht_used;
+ for (hi = d->dv_hashtab.ht_array; todo > 0; ++hi)
+ {
+ if (!HASHITEM_EMPTY(hi))
+ {
+ --todo;
+ item_lock(&HI2DI(hi)->di_tv, deep - 1, lock);
+ }
+ }
+ }
+ }
+ }
+ --recurse;
+}
+
+#if (defined(FEAT_MENU) && defined(FEAT_MULTI_LANG)) || defined(PROTO)
+/*
+ * Delete all "menutrans_" variables.
+ */
+ void
+del_menutrans_vars(void)
+{
+ hashitem_T *hi;
+ int todo;
+
+ hash_lock(&globvarht);
+ todo = (int)globvarht.ht_used;
+ for (hi = globvarht.ht_array; todo > 0 && !got_int; ++hi)
+ {
+ if (!HASHITEM_EMPTY(hi))
+ {
+ --todo;
+ if (STRNCMP(HI2DI(hi)->di_key, "menutrans_", 10) == 0)
+ delete_var(&globvarht, hi);
+ }
+ }
+ hash_unlock(&globvarht);
+}
+#endif
+
+#if defined(FEAT_CMDL_COMPL) || defined(PROTO)
+
+/*
+ * Local string buffer for the next two functions to store a variable name
+ * with its prefix. Allocated in cat_prefix_varname(), freed later in
+ * get_user_var_name().
+ */
+
+static char_u *varnamebuf = NULL;
+static int varnamebuflen = 0;
+
+/*
+ * Function to concatenate a prefix and a variable name.
+ */
+ static char_u *
+cat_prefix_varname(int prefix, char_u *name)
+{
+ int len;
+
+ len = (int)STRLEN(name) + 3;
+ if (len > varnamebuflen)
+ {
+ vim_free(varnamebuf);
+ len += 10; /* some additional space */
+ varnamebuf = alloc(len);
+ if (varnamebuf == NULL)
+ {
+ varnamebuflen = 0;
+ return NULL;
+ }
+ varnamebuflen = len;
+ }
+ *varnamebuf = prefix;
+ varnamebuf[1] = ':';
+ STRCPY(varnamebuf + 2, name);
+ return varnamebuf;
+}
+
+/*
+ * Function given to ExpandGeneric() to obtain the list of user defined
+ * (global/buffer/window/built-in) variable names.
+ */
+ char_u *
+get_user_var_name(expand_T *xp, int idx)
+{
+ static long_u gdone;
+ static long_u bdone;
+ static long_u wdone;
+ static long_u tdone;
+ static int vidx;
+ static hashitem_T *hi;
+ hashtab_T *ht;
+
+ if (idx == 0)
+ {
+ gdone = bdone = wdone = vidx = 0;
+ tdone = 0;
+ }
+
+ /* Global variables */
+ if (gdone < globvarht.ht_used)
+ {
+ if (gdone++ == 0)
+ hi = globvarht.ht_array;
+ else
+ ++hi;
+ while (HASHITEM_EMPTY(hi))
+ ++hi;
+ if (STRNCMP("g:", xp->xp_pattern, 2) == 0)
+ return cat_prefix_varname('g', hi->hi_key);
+ return hi->hi_key;
+ }
+
+ /* b: variables */
+ ht = &curbuf->b_vars->dv_hashtab;
+ if (bdone < ht->ht_used)
+ {
+ if (bdone++ == 0)
+ hi = ht->ht_array;
+ else
+ ++hi;
+ while (HASHITEM_EMPTY(hi))
+ ++hi;
+ return cat_prefix_varname('b', hi->hi_key);
+ }
+
+ /* w: variables */
+ ht = &curwin->w_vars->dv_hashtab;
+ if (wdone < ht->ht_used)
+ {
+ if (wdone++ == 0)
+ hi = ht->ht_array;
+ else
+ ++hi;
+ while (HASHITEM_EMPTY(hi))
+ ++hi;
+ return cat_prefix_varname('w', hi->hi_key);
+ }
+
+ /* t: variables */
+ ht = &curtab->tp_vars->dv_hashtab;
+ if (tdone < ht->ht_used)
+ {
+ if (tdone++ == 0)
+ hi = ht->ht_array;
+ else
+ ++hi;
+ while (HASHITEM_EMPTY(hi))
+ ++hi;
+ return cat_prefix_varname('t', hi->hi_key);
+ }
+
+ /* v: variables */
+ if (vidx < VV_LEN)
+ return cat_prefix_varname('v', (char_u *)vimvars[vidx++].vv_name);
+
+ VIM_CLEAR(varnamebuf);
+ varnamebuflen = 0;
+ return NULL;
+}
+
+#endif /* FEAT_CMDL_COMPL */
+
+/*
+ * Return TRUE if "pat" matches "text".
+ * Does not use 'cpo' and always uses 'magic'.
+ */
+ static int
+pattern_match(char_u *pat, char_u *text, int ic)
+{
+ int matches = FALSE;
+ char_u *save_cpo;
+ regmatch_T regmatch;
+
+ /* avoid 'l' flag in 'cpoptions' */
+ save_cpo = p_cpo;
+ p_cpo = (char_u *)"";
+ regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
+ if (regmatch.regprog != NULL)
+ {
+ regmatch.rm_ic = ic;
+ matches = vim_regexec_nl(&regmatch, text, (colnr_T)0);
+ vim_regfree(regmatch.regprog);
+ }
+ p_cpo = save_cpo;
+ return matches;
+}
+
+/*
+ * The "evaluate" argument: When FALSE, the argument is only parsed but not
+ * executed. The function may return OK, but the rettv will be of type
+ * VAR_UNKNOWN. The function still returns FAIL for a syntax error.
+ */
+
+/*
+ * Handle zero level expression.
+ * This calls eval1() and handles error message and nextcmd.
+ * Put the result in "rettv" when returning OK and "evaluate" is TRUE.
+ * Note: "rettv.v_lock" is not set.
+ * Return OK or FAIL.
+ */
+ int
+eval0(
+ char_u *arg,
+ typval_T *rettv,
+ char_u **nextcmd,
+ int evaluate)
+{
+ int ret;
+ char_u *p;
+ int did_emsg_before = did_emsg;
+ int called_emsg_before = called_emsg;
+
+ p = skipwhite(arg);
+ ret = eval1(&p, rettv, evaluate);
+ if (ret == FAIL || !ends_excmd(*p))
+ {
+ if (ret != FAIL)
+ clear_tv(rettv);
+ /*
+ * Report the invalid expression unless the expression evaluation has
+ * been cancelled due to an aborting error, an interrupt, or an
+ * exception, or we already gave a more specific error.
+ * Also check called_emsg for when using assert_fails().
+ */
+ if (!aborting() && did_emsg == did_emsg_before
+ && called_emsg == called_emsg_before)
+ semsg(_(e_invexpr2), arg);
+ ret = FAIL;
+ }
+ if (nextcmd != NULL)
+ *nextcmd = check_nextcmd(p);
+
+ return ret;
+}
+
+/*
+ * Handle top level expression:
+ * expr2 ? expr1 : expr1
+ *
+ * "arg" must point to the first non-white of the expression.
+ * "arg" is advanced to the next non-white after the recognized expression.
+ *
+ * Note: "rettv.v_lock" is not set.
+ *
+ * Return OK or FAIL.
+ */
+ int
+eval1(char_u **arg, typval_T *rettv, int evaluate)
+{
+ int result;
+ typval_T var2;
+
+ /*
+ * Get the first variable.
+ */
+ if (eval2(arg, rettv, evaluate) == FAIL)
+ return FAIL;
+
+ if ((*arg)[0] == '?')
+ {
+ result = FALSE;
+ if (evaluate)
+ {
+ int error = FALSE;
+
+ if (tv_get_number_chk(rettv, &error) != 0)
+ result = TRUE;
+ clear_tv(rettv);
+ if (error)
+ return FAIL;
+ }
+
+ /*
+ * Get the second variable.
+ */
+ *arg = skipwhite(*arg + 1);
+ if (eval1(arg, rettv, evaluate && result) == FAIL) /* recursive! */
+ return FAIL;
+
+ /*
+ * Check for the ":".
+ */
+ if ((*arg)[0] != ':')
+ {
+ emsg(_("E109: Missing ':' after '?'"));
+ if (evaluate && result)
+ clear_tv(rettv);
+ return FAIL;
+ }
+
+ /*
+ * Get the third variable.
+ */
+ *arg = skipwhite(*arg + 1);
+ if (eval1(arg, &var2, evaluate && !result) == FAIL) /* recursive! */
+ {
+ if (evaluate && result)
+ clear_tv(rettv);
+ return FAIL;
+ }
+ if (evaluate && !result)
+ *rettv = var2;
+ }
+
+ return OK;
+}
+
+/*
+ * Handle first level expression:
+ * expr2 || expr2 || expr2 logical OR
+ *
+ * "arg" must point to the first non-white of the expression.
+ * "arg" is advanced to the next non-white after the recognized expression.
+ *
+ * Return OK or FAIL.
+ */
+ static int
+eval2(char_u **arg, typval_T *rettv, int evaluate)
+{
+ typval_T var2;
+ long result;
+ int first;
+ int error = FALSE;
+
+ /*
+ * Get the first variable.
+ */
+ if (eval3(arg, rettv, evaluate) == FAIL)
+ return FAIL;
+
+ /*
+ * Repeat until there is no following "||".
+ */
+ first = TRUE;
+ result = FALSE;
+ while ((*arg)[0] == '|' && (*arg)[1] == '|')
+ {
+ if (evaluate && first)
+ {
+ if (tv_get_number_chk(rettv, &error) != 0)
+ result = TRUE;
+ clear_tv(rettv);
+ if (error)
+ return FAIL;
+ first = FALSE;
+ }
+
+ /*
+ * Get the second variable.
+ */
+ *arg = skipwhite(*arg + 2);
+ if (eval3(arg, &var2, evaluate && !result) == FAIL)
+ return FAIL;
+
+ /*
+ * Compute the result.
+ */
+ if (evaluate && !result)
+ {
+ if (tv_get_number_chk(&var2, &error) != 0)
+ result = TRUE;
+ clear_tv(&var2);
+ if (error)
+ return FAIL;
+ }
+ if (evaluate)
+ {
+ rettv->v_type = VAR_NUMBER;
+ rettv->vval.v_number = result;
+ }
+ }
+
+ return OK;
+}
+
+/*
+ * Handle second level expression:
+ * expr3 && expr3 && expr3 logical AND
+ *
+ * "arg" must point to the first non-white of the expression.
+ * "arg" is advanced to the next non-white after the recognized expression.
+ *
+ * Return OK or FAIL.
+ */
+ static int
+eval3(char_u **arg, typval_T *rettv, int evaluate)
+{
+ typval_T var2;
+ long result;
+ int first;
+ int error = FALSE;
+
+ /*
+ * Get the first variable.
+ */
+ if (eval4(arg, rettv, evaluate) == FAIL)
+ return FAIL;
+
+ /*
+ * Repeat until there is no following "&&".
+ */
+ first = TRUE;
+ result = TRUE;
+ while ((*arg)[0] == '&' && (*arg)[1] == '&')
+ {
+ if (evaluate && first)
+ {
+ if (tv_get_number_chk(rettv, &error) == 0)
+ result = FALSE;
+ clear_tv(rettv);
+ if (error)
+ return FAIL;
+ first = FALSE;
+ }
+
+ /*
+ * Get the second variable.
+ */
+ *arg = skipwhite(*arg + 2);
+ if (eval4(arg, &var2, evaluate && result) == FAIL)
+ return FAIL;
+
+ /*
+ * Compute the result.
+ */
+ if (evaluate && result)
+ {
+ if (tv_get_number_chk(&var2, &error) == 0)
+ result = FALSE;
+ clear_tv(&var2);
+ if (error)
+ return FAIL;
+ }
+ if (evaluate)
+ {
+ rettv->v_type = VAR_NUMBER;
+ rettv->vval.v_number = result;
+ }
+ }
+
+ return OK;
+}
+
+/*
+ * Handle third level expression:
+ * var1 == var2
+ * var1 =~ var2
+ * var1 != var2
+ * var1 !~ var2
+ * var1 > var2
+ * var1 >= var2
+ * var1 < var2
+ * var1 <= var2
+ * var1 is var2
+ * var1 isnot var2
+ *
+ * "arg" must point to the first non-white of the expression.
+ * "arg" is advanced to the next non-white after the recognized expression.
+ *
+ * Return OK or FAIL.
+ */
+ static int
+eval4(char_u **arg, typval_T *rettv, int evaluate)
+{
+ typval_T var2;
+ char_u *p;
+ int i;
+ exptype_T type = TYPE_UNKNOWN;
+ int type_is = FALSE; /* TRUE for "is" and "isnot" */
+ int len = 2;
+ int ic;
+
+ /*
+ * Get the first variable.
+ */
+ if (eval5(arg, rettv, evaluate) == FAIL)
+ return FAIL;
+
+ p = *arg;
+ switch (p[0])
+ {
+ case '=': if (p[1] == '=')
+ type = TYPE_EQUAL;
+ else if (p[1] == '~')
+ type = TYPE_MATCH;
+ break;
+ case '!': if (p[1] == '=')
+ type = TYPE_NEQUAL;
+ else if (p[1] == '~')
+ type = TYPE_NOMATCH;
+ break;
+ case '>': if (p[1] != '=')
+ {
+ type = TYPE_GREATER;
+ len = 1;
+ }
+ else
+ type = TYPE_GEQUAL;
+ break;
+ case '<': if (p[1] != '=')
+ {
+ type = TYPE_SMALLER;
+ len = 1;
+ }
+ else
+ type = TYPE_SEQUAL;
+ break;
+ case 'i': if (p[1] == 's')
+ {
+ if (p[2] == 'n' && p[3] == 'o' && p[4] == 't')
+ len = 5;
+ i = p[len];
+ if (!isalnum(i) && i != '_')
+ {
+ type = len == 2 ? TYPE_EQUAL : TYPE_NEQUAL;
+ type_is = TRUE;
+ }
+ }
+ break;
+ }
+
+ /*
+ * If there is a comparative operator, use it.
+ */
+ if (type != TYPE_UNKNOWN)
+ {
+ /* extra question mark appended: ignore case */
+ if (p[len] == '?')
+ {
+ ic = TRUE;
+ ++len;
+ }
+ /* extra '#' appended: match case */
+ else if (p[len] == '#')
+ {
+ ic = FALSE;
+ ++len;
+ }
+ /* nothing appended: use 'ignorecase' */
+ else
+ ic = p_ic;
+
+ /*
+ * Get the second variable.
+ */
+ *arg = skipwhite(p + len);
+ if (eval5(arg, &var2, evaluate) == FAIL)
+ {
+ clear_tv(rettv);
+ return FAIL;
+ }
+ if (evaluate)
+ {
+ int ret = typval_compare(rettv, &var2, type, type_is, ic);
+
+ clear_tv(&var2);
+ return ret;
+ }
+ }
+
+ return OK;
+}
+
+/*
+ * Handle fourth level expression:
+ * + number addition
+ * - number subtraction
+ * . string concatenation
+ *
+ * "arg" must point to the first non-white of the expression.
+ * "arg" is advanced to the next non-white after the recognized expression.
+ *
+ * Return OK or FAIL.
+ */
+ static int
+eval5(char_u **arg, typval_T *rettv, int evaluate)
+{
+ typval_T var2;
+ typval_T var3;
+ int op;
+ varnumber_T n1, n2;
+#ifdef FEAT_FLOAT
+ float_T f1 = 0, f2 = 0;
+#endif
+ char_u *s1, *s2;
+ char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN];
+ char_u *p;
+
+ /*
+ * Get the first variable.
+ */
+ if (eval6(arg, rettv, evaluate, FALSE) == FAIL)
+ return FAIL;
+
+ /*
+ * Repeat computing, until no '+', '-' or '.' is following.
+ */
+ for (;;)
+ {
+ op = **arg;
+ if (op != '+' && op != '-' && op != '.')
+ break;
+
+ if ((op != '+' || (rettv->v_type != VAR_LIST
+ && rettv->v_type != VAR_BLOB))
+#ifdef FEAT_FLOAT
+ && (op == '.' || rettv->v_type != VAR_FLOAT)
+#endif
+ )
+ {
+ /* For "list + ...", an illegal use of the first operand as
+ * a number cannot be determined before evaluating the 2nd
+ * operand: if this is also a list, all is ok.
+ * For "something . ...", "something - ..." or "non-list + ...",
+ * we know that the first operand needs to be a string or number
+ * without evaluating the 2nd operand. So check before to avoid
+ * side effects after an error. */
+ if (evaluate && tv_get_string_chk(rettv) == NULL)
+ {
+ clear_tv(rettv);
+ return FAIL;
+ }
+ }
+
+ /*
+ * Get the second variable.
+ */
+ *arg = skipwhite(*arg + 1);
+ if (eval6(arg, &var2, evaluate, op == '.') == FAIL)
+ {
+ clear_tv(rettv);
+ return FAIL;
+ }
+
+ if (evaluate)
+ {
+ /*
+ * Compute the result.
+ */
+ if (op == '.')
+ {
+ s1 = tv_get_string_buf(rettv, buf1); /* already checked */
+ s2 = tv_get_string_buf_chk(&var2, buf2);
+ if (s2 == NULL) /* type error ? */
+ {
+ clear_tv(rettv);
+ clear_tv(&var2);
+ return FAIL;
+ }
+ p = concat_str(s1, s2);
+ clear_tv(rettv);
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = p;
+ }
+ else if (op == '+' && rettv->v_type == VAR_BLOB
+ && var2.v_type == VAR_BLOB)
+ {
+ blob_T *b1 = rettv->vval.v_blob;
+ blob_T *b2 = var2.vval.v_blob;
+ blob_T *b = blob_alloc();
+ int i;
+
+ if (b != NULL)
+ {
+ for (i = 0; i < blob_len(b1); i++)
+ ga_append(&b->bv_ga, blob_get(b1, i));
+ for (i = 0; i < blob_len(b2); i++)
+ ga_append(&b->bv_ga, blob_get(b2, i));
+
+ clear_tv(rettv);
+ rettv_blob_set(rettv, b);
+ }
+ }
+ else if (op == '+' && rettv->v_type == VAR_LIST
+ && var2.v_type == VAR_LIST)
+ {
+ /* concatenate Lists */
+ if (list_concat(rettv->vval.v_list, var2.vval.v_list,
+ &var3) == FAIL)
+ {
+ clear_tv(rettv);
+ clear_tv(&var2);
+ return FAIL;
+ }
+ clear_tv(rettv);
+ *rettv = var3;
+ }
+ else
+ {
+ int error = FALSE;
+
+#ifdef FEAT_FLOAT
+ if (rettv->v_type == VAR_FLOAT)
+ {
+ f1 = rettv->vval.v_float;
+ n1 = 0;
+ }
+ else
+#endif
+ {
+ n1 = tv_get_number_chk(rettv, &error);
+ if (error)
+ {
+ /* This can only happen for "list + non-list". For
+ * "non-list + ..." or "something - ...", we returned
+ * before evaluating the 2nd operand. */
+ clear_tv(rettv);
+ return FAIL;
+ }
+#ifdef FEAT_FLOAT
+ if (var2.v_type == VAR_FLOAT)
+ f1 = n1;
+#endif
+ }
+#ifdef FEAT_FLOAT
+ if (var2.v_type == VAR_FLOAT)
+ {
+ f2 = var2.vval.v_float;
+ n2 = 0;
+ }
+ else
+#endif
+ {
+ n2 = tv_get_number_chk(&var2, &error);
+ if (error)
+ {
+ clear_tv(rettv);
+ clear_tv(&var2);
+ return FAIL;
+ }
+#ifdef FEAT_FLOAT
+ if (rettv->v_type == VAR_FLOAT)
+ f2 = n2;
+#endif
+ }
+ clear_tv(rettv);
+
+#ifdef FEAT_FLOAT
+ /* If there is a float on either side the result is a float. */
+ if (rettv->v_type == VAR_FLOAT || var2.v_type == VAR_FLOAT)
+ {
+ if (op == '+')
+ f1 = f1 + f2;
+ else
+ f1 = f1 - f2;
+ rettv->v_type = VAR_FLOAT;
+ rettv->vval.v_float = f1;
+ }
+ else
+#endif
+ {
+ if (op == '+')
+ n1 = n1 + n2;
+ else
+ n1 = n1 - n2;
+ rettv->v_type = VAR_NUMBER;
+ rettv->vval.v_number = n1;
+ }
+ }
+ clear_tv(&var2);
+ }
+ }
+ return OK;
+}
+
+/*
+ * Handle fifth level expression:
+ * * number multiplication
+ * / number division
+ * % number modulo
+ *
+ * "arg" must point to the first non-white of the expression.
+ * "arg" is advanced to the next non-white after the recognized expression.
+ *
+ * Return OK or FAIL.
+ */
+ static int
+eval6(
+ char_u **arg,
+ typval_T *rettv,
+ int evaluate,
+ int want_string) /* after "." operator */
+{
+ typval_T var2;
+ int op;
+ varnumber_T n1, n2;
+#ifdef FEAT_FLOAT
+ int use_float = FALSE;
+ float_T f1 = 0, f2;
+#endif
+ int error = FALSE;
+
+ /*
+ * Get the first variable.
+ */
+ if (eval7(arg, rettv, evaluate, want_string) == FAIL)
+ return FAIL;
+
+ /*
+ * Repeat computing, until no '*', '/' or '%' is following.
+ */
+ for (;;)
+ {
+ op = **arg;
+ if (op != '*' && op != '/' && op != '%')
+ break;
+
+ if (evaluate)
+ {
+#ifdef FEAT_FLOAT
+ if (rettv->v_type == VAR_FLOAT)
+ {
+ f1 = rettv->vval.v_float;
+ use_float = TRUE;
+ n1 = 0;
+ }
+ else
+#endif
+ n1 = tv_get_number_chk(rettv, &error);
+ clear_tv(rettv);
+ if (error)
+ return FAIL;
+ }
+ else
+ n1 = 0;
+
+ /*
+ * Get the second variable.
+ */
+ *arg = skipwhite(*arg + 1);
+ if (eval7(arg, &var2, evaluate, FALSE) == FAIL)
+ return FAIL;
+
+ if (evaluate)
+ {
+#ifdef FEAT_FLOAT
+ if (var2.v_type == VAR_FLOAT)
+ {
+ if (!use_float)
+ {
+ f1 = n1;
+ use_float = TRUE;
+ }
+ f2 = var2.vval.v_float;
+ n2 = 0;
+ }
+ else
+#endif
+ {
+ n2 = tv_get_number_chk(&var2, &error);
+ clear_tv(&var2);
+ if (error)
+ return FAIL;
+#ifdef FEAT_FLOAT
+ if (use_float)
+ f2 = n2;
+#endif
+ }
+
+ /*
+ * Compute the result.
+ * When either side is a float the result is a float.
+ */
+#ifdef FEAT_FLOAT
+ if (use_float)
+ {
+ if (op == '*')
+ f1 = f1 * f2;
+ else if (op == '/')
+ {
+# ifdef VMS
+ /* VMS crashes on divide by zero, work around it */
+ if (f2 == 0.0)
+ {
+ if (f1 == 0)
+ f1 = -1 * __F_FLT_MAX - 1L; /* similar to NaN */
+ else if (f1 < 0)
+ f1 = -1 * __F_FLT_MAX;
+ else
+ f1 = __F_FLT_MAX;
+ }
+ else
+ f1 = f1 / f2;
+# else
+ /* We rely on the floating point library to handle divide
+ * by zero to result in "inf" and not a crash. */
+ f1 = f1 / f2;
+# endif
+ }
+ else
+ {
+ emsg(_("E804: Cannot use '%' with Float"));
+ return FAIL;
+ }
+ rettv->v_type = VAR_FLOAT;
+ rettv->vval.v_float = f1;
+ }
+ else
+#endif
+ {
+ if (op == '*')
+ n1 = n1 * n2;
+ else if (op == '/')
+ {
+ if (n2 == 0) /* give an error message? */
+ {
+ if (n1 == 0)
+ n1 = VARNUM_MIN; /* similar to NaN */
+ else if (n1 < 0)
+ n1 = -VARNUM_MAX;
+ else
+ n1 = VARNUM_MAX;
+ }
+ else
+ n1 = n1 / n2;
+ }
+ else
+ {
+ if (n2 == 0) /* give an error message? */
+ n1 = 0;
+ else
+ n1 = n1 % n2;
+ }
+ rettv->v_type = VAR_NUMBER;
+ rettv->vval.v_number = n1;
+ }
+ }
+ }
+
+ return OK;
+}
+
+/*
+ * Handle sixth level expression:
+ * number number constant
+ * 0zFFFFFFFF Blob constant
+ * "string" string constant
+ * 'string' literal string constant
+ * &option-name option value
+ * @r register contents
+ * identifier variable value
+ * function() function call
+ * $VAR environment variable
+ * (expression) nested expression
+ * [expr, expr] List
+ * {key: val, key: val} Dictionary
+ *
+ * Also handle:
+ * ! in front logical NOT
+ * - in front unary minus
+ * + in front unary plus (ignored)
+ * trailing [] subscript in String or List
+ * trailing .name entry in Dictionary
+ *
+ * "arg" must point to the first non-white of the expression.
+ * "arg" is advanced to the next non-white after the recognized expression.
+ *
+ * Return OK or FAIL.
+ */
+ static int
+eval7(
+ char_u **arg,
+ typval_T *rettv,
+ int evaluate,
+ int want_string UNUSED) /* after "." operator */
+{
+ varnumber_T n;
+ int len;
+ char_u *s;
+ char_u *start_leader, *end_leader;
+ int ret = OK;
+ char_u *alias;
+
+ /*
+ * Initialise variable so that clear_tv() can't mistake this for a
+ * string and free a string that isn't there.
+ */
+ rettv->v_type = VAR_UNKNOWN;
+
+ /*
+ * Skip '!', '-' and '+' characters. They are handled later.
+ */
+ start_leader = *arg;
+ while (**arg == '!' || **arg == '-' || **arg == '+')
+ *arg = skipwhite(*arg + 1);
+ end_leader = *arg;
+
+ switch (**arg)
+ {
+ /*
+ * Number constant.
+ */
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ {
+#ifdef FEAT_FLOAT
+ char_u *p = skipdigits(*arg + 1);
+ int get_float = FALSE;
+
+ /* We accept a float when the format matches
+ * "[0-9]\+\.[0-9]\+\([eE][+-]\?[0-9]\+\)\?". This is very
+ * strict to avoid backwards compatibility problems.
+ * Don't look for a float after the "." operator, so that
+ * ":let vers = 1.2.3" doesn't fail. */
+ if (!want_string && p[0] == '.' && vim_isdigit(p[1]))
+ {
+ get_float = TRUE;
+ p = skipdigits(p + 2);
+ if (*p == 'e' || *p == 'E')
+ {
+ ++p;
+ if (*p == '-' || *p == '+')
+ ++p;
+ if (!vim_isdigit(*p))
+ get_float = FALSE;
+ else
+ p = skipdigits(p + 1);
+ }
+ if (ASCII_ISALPHA(*p) || *p == '.')
+ get_float = FALSE;
+ }
+ if (get_float)
+ {
+ float_T f;
+
+ *arg += string2float(*arg, &f);
+ if (evaluate)
+ {
+ rettv->v_type = VAR_FLOAT;
+ rettv->vval.v_float = f;
+ }
+ }
+ else
+#endif
+ if (**arg == '0' && ((*arg)[1] == 'z' || (*arg)[1] == 'Z'))
+ {
+ char_u *bp;
+ blob_T *blob = NULL; // init for gcc
+
+ // Blob constant: 0z0123456789abcdef
+ if (evaluate)
+ blob = blob_alloc();
+ for (bp = *arg + 2; vim_isxdigit(bp[0]); bp += 2)
+ {
+ if (!vim_isxdigit(bp[1]))
+ {
+ if (blob != NULL)
+ {
+ emsg(_("E973: Blob literal should have an even number of hex characters"));
+ ga_clear(&blob->bv_ga);
+ VIM_CLEAR(blob);
+ }
+ ret = FAIL;
+ break;
+ }
+ if (blob != NULL)
+ ga_append(&blob->bv_ga,
+ (hex2nr(*bp) << 4) + hex2nr(*(bp+1)));
+ if (bp[2] == '.' && vim_isxdigit(bp[3]))
+ ++bp;
+ }
+ if (blob != NULL)
+ rettv_blob_set(rettv, blob);
+ *arg = bp;
+ }
+ else
+ {
+ // decimal, hex or octal number
+ vim_str2nr(*arg, NULL, &len, STR2NR_ALL, &n, NULL, 0);
+ *arg += len;
+ if (evaluate)
+ {
+ rettv->v_type = VAR_NUMBER;
+ rettv->vval.v_number = n;
+ }
+ }
+ break;
+ }
+
+ /*
+ * String constant: "string".
+ */
+ case '"': ret = get_string_tv(arg, rettv, evaluate);
+ break;
+
+ /*
+ * Literal string constant: 'str''ing'.
+ */
+ case '\'': ret = get_lit_string_tv(arg, rettv, evaluate);
+ break;
+
+ /*
+ * List: [expr, expr]
+ */
+ case '[': ret = get_list_tv(arg, rettv, evaluate);
+ break;
+
+ /*
+ * Lambda: {arg, arg -> expr}
+ * Dictionary: {key: val, key: val}
+ */
+ case '{': ret = get_lambda_tv(arg, rettv, evaluate);
+ if (ret == NOTDONE)
+ ret = dict_get_tv(arg, rettv, evaluate);
+ break;
+
+ /*
+ * Option value: &name
+ */
+ case '&': ret = get_option_tv(arg, rettv, evaluate);
+ break;
+
+ /*
+ * Environment variable: $VAR.
+ */
+ case '$': ret = get_env_tv(arg, rettv, evaluate);
+ break;
+
+ /*
+ * Register contents: @r.
+ */
+ case '@': ++*arg;
+ if (evaluate)
+ {
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = get_reg_contents(**arg,
+ GREG_EXPR_SRC);
+ }
+ if (**arg != NUL)
+ ++*arg;
+ break;
+
+ /*
+ * nested expression: (expression).
+ */
+ case '(': *arg = skipwhite(*arg + 1);
+ ret = eval1(arg, rettv, evaluate); /* recursive! */
+ if (**arg == ')')
+ ++*arg;
+ else if (ret == OK)
+ {
+ emsg(_("E110: Missing ')'"));
+ clear_tv(rettv);
+ ret = FAIL;
+ }
+ break;
+
+ default: ret = NOTDONE;
+ break;
+ }
+
+ if (ret == NOTDONE)
+ {
+ /*
+ * Must be a variable or function name.
+ * Can also be a curly-braces kind of name: {expr}.
+ */
+ s = *arg;
+ len = get_name_len(arg, &alias, evaluate, TRUE);
+ if (alias != NULL)
+ s = alias;
+
+ if (len <= 0)
+ ret = FAIL;
+ else
+ {
+ if (**arg == '(') /* recursive! */
+ {
+ partial_T *partial;
+
+ if (!evaluate)
+ check_vars(s, len);
+
+ /* If "s" is the name of a variable of type VAR_FUNC
+ * use its contents. */
+ s = deref_func_name(s, &len, &partial, !evaluate);
+
+ /* Need to make a copy, in case evaluating the arguments makes
+ * the name invalid. */
+ s = vim_strsave(s);
+ if (s == NULL)
+ ret = FAIL;
+ else
+ /* Invoke the function. */
+ ret = get_func_tv(s, len, rettv, arg,
+ curwin->w_cursor.lnum, curwin->w_cursor.lnum,
+ &len, evaluate, partial, NULL);
+ vim_free(s);
+
+ /* If evaluate is FALSE rettv->v_type was not set in
+ * get_func_tv, but it's needed in handle_subscript() to parse
+ * what follows. So set it here. */
+ if (rettv->v_type == VAR_UNKNOWN && !evaluate && **arg == '(')
+ {
+ rettv->vval.v_string = NULL;
+ rettv->v_type = VAR_FUNC;
+ }
+
+ /* Stop the expression evaluation when immediately
+ * aborting on error, or when an interrupt occurred or
+ * an exception was thrown but not caught. */
+ if (aborting())
+ {
+ if (ret == OK)
+ clear_tv(rettv);
+ ret = FAIL;
+ }
+ }
+ else if (evaluate)
+ ret = get_var_tv(s, len, rettv, NULL, TRUE, FALSE);
+ else
+ {
+ check_vars(s, len);
+ ret = OK;
+ }
+ }
+ vim_free(alias);
+ }
+
+ *arg = skipwhite(*arg);
+
+ /* Handle following '[', '(' and '.' for expr[expr], expr.name,
+ * expr(expr). */
+ if (ret == OK)
+ ret = handle_subscript(arg, rettv, evaluate, TRUE);
+
+ /*
+ * Apply logical NOT and unary '-', from right to left, ignore '+'.
+ */
+ if (ret == OK && evaluate && end_leader > start_leader)
+ {
+ int error = FALSE;
+ varnumber_T val = 0;
+#ifdef FEAT_FLOAT
+ float_T f = 0.0;
+
+ if (rettv->v_type == VAR_FLOAT)
+ f = rettv->vval.v_float;
+ else
+#endif
+ val = tv_get_number_chk(rettv, &error);
+ if (error)
+ {
+ clear_tv(rettv);
+ ret = FAIL;
+ }
+ else
+ {
+ while (end_leader > start_leader)
+ {
+ --end_leader;
+ if (*end_leader == '!')
+ {
+#ifdef FEAT_FLOAT
+ if (rettv->v_type == VAR_FLOAT)
+ f = !f;
+ else
+#endif
+ val = !val;
+ }
+ else if (*end_leader == '-')
+ {
+#ifdef FEAT_FLOAT
+ if (rettv->v_type == VAR_FLOAT)
+ f = -f;
+ else
+#endif
+ val = -val;
+ }
+ }
+#ifdef FEAT_FLOAT
+ if (rettv->v_type == VAR_FLOAT)
+ {
+ clear_tv(rettv);
+ rettv->vval.v_float = f;
+ }
+ else
+#endif
+ {
+ clear_tv(rettv);
+ rettv->v_type = VAR_NUMBER;
+ rettv->vval.v_number = val;
+ }
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * Evaluate an "[expr]" or "[expr:expr]" index. Also "dict.key".
+ * "*arg" points to the '[' or '.'.
+ * Returns FAIL or OK. "*arg" is advanced to after the ']'.
+ */
+ static int
+eval_index(
+ char_u **arg,
+ typval_T *rettv,
+ int evaluate,
+ int verbose) /* give error messages */
+{
+ int empty1 = FALSE, empty2 = FALSE;
+ typval_T var1, var2;
+ long i;
+ long n1, n2 = 0;
+ long len = -1;
+ int range = FALSE;
+ char_u *s;
+ char_u *key = NULL;
+
+ switch (rettv->v_type)
+ {
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ if (verbose)
+ emsg(_("E695: Cannot index a Funcref"));
+ return FAIL;
+ case VAR_FLOAT:
+#ifdef FEAT_FLOAT
+ if (verbose)
+ emsg(_(e_float_as_string));
+ return FAIL;
+#endif
+ case VAR_SPECIAL:
+ case VAR_JOB:
+ case VAR_CHANNEL:
+ if (verbose)
+ emsg(_("E909: Cannot index a special variable"));
+ return FAIL;
+ case VAR_UNKNOWN:
+ if (evaluate)
+ return FAIL;
+ /* FALLTHROUGH */
+
+ case VAR_STRING:
+ case VAR_NUMBER:
+ case VAR_LIST:
+ case VAR_DICT:
+ case VAR_BLOB:
+ break;
+ }
+
+ init_tv(&var1);
+ init_tv(&var2);
+ if (**arg == '.')
+ {
+ /*
+ * dict.name
+ */
+ key = *arg + 1;
+ for (len = 0; ASCII_ISALNUM(key[len]) || key[len] == '_'; ++len)
+ ;
+ if (len == 0)
+ return FAIL;
+ *arg = skipwhite(key + len);
+ }
+ else
+ {
+ /*
+ * something[idx]
+ *
+ * Get the (first) variable from inside the [].
+ */
+ *arg = skipwhite(*arg + 1);
+ if (**arg == ':')
+ empty1 = TRUE;
+ else if (eval1(arg, &var1, evaluate) == FAIL) /* recursive! */
+ return FAIL;
+ else if (evaluate && tv_get_string_chk(&var1) == NULL)
+ {
+ /* not a number or string */
+ clear_tv(&var1);
+ return FAIL;
+ }
+
+ /*
+ * Get the second variable from inside the [:].
+ */
+ if (**arg == ':')
+ {
+ range = TRUE;
+ *arg = skipwhite(*arg + 1);
+ if (**arg == ']')
+ empty2 = TRUE;
+ else if (eval1(arg, &var2, evaluate) == FAIL) /* recursive! */
+ {
+ if (!empty1)
+ clear_tv(&var1);
+ return FAIL;
+ }
+ else if (evaluate && tv_get_string_chk(&var2) == NULL)
+ {
+ /* not a number or string */
+ if (!empty1)
+ clear_tv(&var1);
+ clear_tv(&var2);
+ return FAIL;
+ }
+ }
+
+ /* Check for the ']'. */
+ if (**arg != ']')
+ {
+ if (verbose)
+ emsg(_(e_missbrac));
+ clear_tv(&var1);
+ if (range)
+ clear_tv(&var2);
+ return FAIL;
+ }
+ *arg = skipwhite(*arg + 1); /* skip the ']' */
+ }
+
+ if (evaluate)
+ {
+ n1 = 0;
+ if (!empty1 && rettv->v_type != VAR_DICT)
+ {
+ n1 = tv_get_number(&var1);
+ clear_tv(&var1);
+ }
+ if (range)
+ {
+ if (empty2)
+ n2 = -1;
+ else
+ {
+ n2 = tv_get_number(&var2);
+ clear_tv(&var2);
+ }
+ }
+
+ switch (rettv->v_type)
+ {
+ case VAR_UNKNOWN:
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ case VAR_FLOAT:
+ case VAR_SPECIAL:
+ case VAR_JOB:
+ case VAR_CHANNEL:
+ break; /* not evaluating, skipping over subscript */
+
+ case VAR_NUMBER:
+ case VAR_STRING:
+ s = tv_get_string(rettv);
+ len = (long)STRLEN(s);
+ if (range)
+ {
+ /* The resulting variable is a substring. If the indexes
+ * are out of range the result is empty. */
+ if (n1 < 0)
+ {
+ n1 = len + n1;
+ if (n1 < 0)
+ n1 = 0;
+ }
+ if (n2 < 0)
+ n2 = len + n2;
+ else if (n2 >= len)
+ n2 = len;
+ if (n1 >= len || n2 < 0 || n1 > n2)
+ s = NULL;
+ else
+ s = vim_strnsave(s + n1, (int)(n2 - n1 + 1));
+ }
+ else
+ {
+ /* The resulting variable is a string of a single
+ * character. If the index is too big or negative the
+ * result is empty. */
+ if (n1 >= len || n1 < 0)
+ s = NULL;
+ else
+ s = vim_strnsave(s + n1, 1);
+ }
+ clear_tv(rettv);
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = s;
+ break;
+
+ case VAR_BLOB:
+ len = blob_len(rettv->vval.v_blob);
+ if (range)
+ {
+ // The resulting variable is a sub-blob. If the indexes
+ // are out of range the result is empty.
+ if (n1 < 0)
+ {
+ n1 = len + n1;
+ if (n1 < 0)
+ n1 = 0;
+ }
+ if (n2 < 0)
+ n2 = len + n2;
+ else if (n2 >= len)
+ n2 = len - 1;
+ if (n1 >= len || n2 < 0 || n1 > n2)
+ {
+ clear_tv(rettv);
+ rettv->v_type = VAR_BLOB;
+ rettv->vval.v_blob = NULL;
+ }
+ else
+ {
+ blob_T *blob = blob_alloc();
+
+ if (blob != NULL)
+ {
+ if (ga_grow(&blob->bv_ga, n2 - n1 + 1) == FAIL)
+ {
+ blob_free(blob);
+ return FAIL;
+ }
+ blob->bv_ga.ga_len = n2 - n1 + 1;
+ for (i = n1; i <= n2; i++)
+ blob_set(blob, i - n1,
+ blob_get(rettv->vval.v_blob, i));
+
+ clear_tv(rettv);
+ rettv_blob_set(rettv, blob);
+ }
+ }
+ }
+ else
+ {
+ // The resulting variable is a byte value.
+ // If the index is too big or negative that is an error.
+ if (n1 < 0)
+ n1 = len + n1;
+ if (n1 < len && n1 >= 0)
+ {
+ int v = blob_get(rettv->vval.v_blob, n1);
+
+ clear_tv(rettv);
+ rettv->v_type = VAR_NUMBER;
+ rettv->vval.v_number = v;
+ }
+ else
+ semsg(_(e_blobidx), n1);
+ }
+ break;
+
+ case VAR_LIST:
+ len = list_len(rettv->vval.v_list);
+ if (n1 < 0)
+ n1 = len + n1;
+ if (!empty1 && (n1 < 0 || n1 >= len))
+ {
+ /* For a range we allow invalid values and return an empty
+ * list. A list index out of range is an error. */
+ if (!range)
+ {
+ if (verbose)
+ semsg(_(e_listidx), n1);
+ return FAIL;
+ }
+ n1 = len;
+ }
+ if (range)
+ {
+ list_T *l;
+ listitem_T *item;
+
+ if (n2 < 0)
+ n2 = len + n2;
+ else if (n2 >= len)
+ n2 = len - 1;
+ if (!empty2 && (n2 < 0 || n2 + 1 < n1))
+ n2 = -1;
+ l = list_alloc();
+ if (l == NULL)
+ return FAIL;
+ for (item = list_find(rettv->vval.v_list, n1);
+ n1 <= n2; ++n1)
+ {
+ if (list_append_tv(l, &item->li_tv) == FAIL)
+ {
+ list_free(l);
+ return FAIL;
+ }
+ item = item->li_next;
+ }
+ clear_tv(rettv);
+ rettv_list_set(rettv, l);
+ }
+ else
+ {
+ copy_tv(&list_find(rettv->vval.v_list, n1)->li_tv, &var1);
+ clear_tv(rettv);
+ *rettv = var1;
+ }
+ break;
+
+ case VAR_DICT:
+ if (range)
+ {
+ if (verbose)
+ emsg(_(e_dictrange));
+ if (len == -1)
+ clear_tv(&var1);
+ return FAIL;
+ }
+ {
+ dictitem_T *item;
+
+ if (len == -1)
+ {
+ key = tv_get_string_chk(&var1);
+ if (key == NULL)
+ {
+ clear_tv(&var1);
+ return FAIL;
+ }
+ }
+
+ item = dict_find(rettv->vval.v_dict, key, (int)len);
+
+ if (item == NULL && verbose)
+ semsg(_(e_dictkey), key);
+ if (len == -1)
+ clear_tv(&var1);
+ if (item == NULL)
+ return FAIL;
+
+ copy_tv(&item->di_tv, &var1);
+ clear_tv(rettv);
+ *rettv = var1;
+ }
+ break;
+ }
+ }
+
+ return OK;
+}
+
+/*
+ * Get an option value.
+ * "arg" points to the '&' or '+' before the option name.
+ * "arg" is advanced to character after the option name.
+ * Return OK or FAIL.
+ */
+ int
+get_option_tv(
+ char_u **arg,
+ typval_T *rettv, /* when NULL, only check if option exists */
+ int evaluate)
+{
+ char_u *option_end;
+ long numval;
+ char_u *stringval;
+ int opt_type;
+ int c;
+ int working = (**arg == '+'); /* has("+option") */
+ int ret = OK;
+ int opt_flags;
+
+ /*
+ * Isolate the option name and find its value.
+ */
+ option_end = find_option_end(arg, &opt_flags);
+ if (option_end == NULL)
+ {
+ if (rettv != NULL)
+ semsg(_("E112: Option name missing: %s"), *arg);
+ return FAIL;
+ }
+
+ if (!evaluate)
+ {
+ *arg = option_end;
+ return OK;
+ }
+
+ c = *option_end;
+ *option_end = NUL;
+ opt_type = get_option_value(*arg, &numval,
+ rettv == NULL ? NULL : &stringval, opt_flags);
+
+ if (opt_type == -3) /* invalid name */
+ {
+ if (rettv != NULL)
+ semsg(_("E113: Unknown option: %s"), *arg);
+ ret = FAIL;
+ }
+ else if (rettv != NULL)
+ {
+ if (opt_type == -2) /* hidden string option */
+ {
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = NULL;
+ }
+ else if (opt_type == -1) /* hidden number option */
+ {
+ rettv->v_type = VAR_NUMBER;
+ rettv->vval.v_number = 0;
+ }
+ else if (opt_type == 1) /* number option */
+ {
+ rettv->v_type = VAR_NUMBER;
+ rettv->vval.v_number = numval;
+ }
+ else /* string option */
+ {
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = stringval;
+ }
+ }
+ else if (working && (opt_type == -2 || opt_type == -1))
+ ret = FAIL;
+
+ *option_end = c; /* put back for error messages */
+ *arg = option_end;
+
+ return ret;
+}
+
+/*
+ * Allocate a variable for a string constant.
+ * Return OK or FAIL.
+ */
+ static int
+get_string_tv(char_u **arg, typval_T *rettv, int evaluate)
+{
+ char_u *p;
+ char_u *name;
+ int extra = 0;
+
+ /*
+ * Find the end of the string, skipping backslashed characters.
+ */
+ for (p = *arg + 1; *p != NUL && *p != '"'; MB_PTR_ADV(p))
+ {
+ if (*p == '\\' && p[1] != NUL)
+ {
+ ++p;
+ /* A "\<x>" form occupies at least 4 characters, and produces up
+ * to 6 characters: reserve space for 2 extra */
+ if (*p == '<')
+ extra += 2;
+ }
+ }
+
+ if (*p != '"')
+ {
+ semsg(_("E114: Missing quote: %s"), *arg);
+ return FAIL;
+ }
+
+ /* If only parsing, set *arg and return here */
+ if (!evaluate)
+ {
+ *arg = p + 1;
+ return OK;
+ }
+
+ /*
+ * Copy the string into allocated memory, handling backslashed
+ * characters.
+ */
+ name = alloc((unsigned)(p - *arg + extra));
+ if (name == NULL)
+ return FAIL;
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = name;
+
+ for (p = *arg + 1; *p != NUL && *p != '"'; )
+ {
+ if (*p == '\\')
+ {
+ switch (*++p)
+ {
+ case 'b': *name++ = BS; ++p; break;
+ case 'e': *name++ = ESC; ++p; break;
+ case 'f': *name++ = FF; ++p; break;
+ case 'n': *name++ = NL; ++p; break;
+ case 'r': *name++ = CAR; ++p; break;
+ case 't': *name++ = TAB; ++p; break;
+
+ case 'X': /* hex: "\x1", "\x12" */
+ case 'x':
+ case 'u': /* Unicode: "\u0023" */
+ case 'U':
+ if (vim_isxdigit(p[1]))
+ {
+ int n, nr;
+ int c = toupper(*p);
+
+ if (c == 'X')
+ n = 2;
+ else if (*p == 'u')
+ n = 4;
+ else
+ n = 8;
+ nr = 0;
+ while (--n >= 0 && vim_isxdigit(p[1]))
+ {
+ ++p;
+ nr = (nr << 4) + hex2nr(*p);
+ }
+ ++p;
+ /* For "\u" store the number according to
+ * 'encoding'. */
+ if (c != 'X')
+ name += (*mb_char2bytes)(nr, name);
+ else
+ *name++ = nr;
+ }
+ break;
+
+ /* octal: "\1", "\12", "\123" */
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7': *name = *p++ - '0';
+ if (*p >= '0' && *p <= '7')
+ {
+ *name = (*name << 3) + *p++ - '0';
+ if (*p >= '0' && *p <= '7')
+ *name = (*name << 3) + *p++ - '0';
+ }
+ ++name;
+ break;
+
+ /* Special key, e.g.: "\<C-W>" */
+ case '<': extra = trans_special(&p, name, TRUE, TRUE);
+ if (extra != 0)
+ {
+ name += extra;
+ break;
+ }
+ /* FALLTHROUGH */
+
+ default: MB_COPY_CHAR(p, name);
+ break;
+ }
+ }
+ else
+ MB_COPY_CHAR(p, name);
+
+ }
+ *name = NUL;
+ if (*p != NUL) /* just in case */
+ ++p;
+ *arg = p;
+
+ return OK;
+}
+
+/*
+ * Allocate a variable for a 'str''ing' constant.
+ * Return OK or FAIL.
+ */
+ static int
+get_lit_string_tv(char_u **arg, typval_T *rettv, int evaluate)
+{
+ char_u *p;
+ char_u *str;
+ int reduce = 0;
+
+ /*
+ * Find the end of the string, skipping ''.
+ */
+ for (p = *arg + 1; *p != NUL; MB_PTR_ADV(p))
+ {
+ if (*p == '\'')
+ {
+ if (p[1] != '\'')
+ break;
+ ++reduce;
+ ++p;
+ }
+ }
+
+ if (*p != '\'')
+ {
+ semsg(_("E115: Missing quote: %s"), *arg);
+ return FAIL;
+ }
+
+ /* If only parsing return after setting "*arg" */
+ if (!evaluate)
+ {
+ *arg = p + 1;
+ return OK;
+ }
+
+ /*
+ * Copy the string into allocated memory, handling '' to ' reduction.
+ */
+ str = alloc((unsigned)((p - *arg) - reduce));
+ if (str == NULL)
+ return FAIL;
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = str;
+
+ for (p = *arg + 1; *p != NUL; )
+ {
+ if (*p == '\'')
+ {
+ if (p[1] != '\'')
+ break;
+ ++p;
+ }
+ MB_COPY_CHAR(p, str);
+ }
+ *str = NUL;
+ *arg = p + 1;
+
+ return OK;
+}
+
+/*
+ * Return the function name of the partial.
+ */
+ char_u *
+partial_name(partial_T *pt)
+{
+ if (pt->pt_name != NULL)
+ return pt->pt_name;
+ return pt->pt_func->uf_name;
+}
+
+ static void
+partial_free(partial_T *pt)
+{
+ int i;
+
+ for (i = 0; i < pt->pt_argc; ++i)
+ clear_tv(&pt->pt_argv[i]);
+ vim_free(pt->pt_argv);
+ dict_unref(pt->pt_dict);
+ if (pt->pt_name != NULL)
+ {
+ func_unref(pt->pt_name);
+ vim_free(pt->pt_name);
+ }
+ else
+ func_ptr_unref(pt->pt_func);
+ vim_free(pt);
+}
+
+/*
+ * Unreference a closure: decrement the reference count and free it when it
+ * becomes zero.
+ */
+ void
+partial_unref(partial_T *pt)
+{
+ if (pt != NULL && --pt->pt_refcount <= 0)
+ partial_free(pt);
+}
+
+static int tv_equal_recurse_limit;
+
+ static int
+func_equal(
+ typval_T *tv1,
+ typval_T *tv2,
+ int ic) /* ignore case */
+{
+ char_u *s1, *s2;
+ dict_T *d1, *d2;
+ int a1, a2;
+ int i;
+
+ /* empty and NULL function name considered the same */
+ s1 = tv1->v_type == VAR_FUNC ? tv1->vval.v_string
+ : partial_name(tv1->vval.v_partial);
+ if (s1 != NULL && *s1 == NUL)
+ s1 = NULL;
+ s2 = tv2->v_type == VAR_FUNC ? tv2->vval.v_string
+ : partial_name(tv2->vval.v_partial);
+ if (s2 != NULL && *s2 == NUL)
+ s2 = NULL;
+ if (s1 == NULL || s2 == NULL)
+ {
+ if (s1 != s2)
+ return FALSE;
+ }
+ else if (STRCMP(s1, s2) != 0)
+ return FALSE;
+
+ /* empty dict and NULL dict is different */
+ d1 = tv1->v_type == VAR_FUNC ? NULL : tv1->vval.v_partial->pt_dict;
+ d2 = tv2->v_type == VAR_FUNC ? NULL : tv2->vval.v_partial->pt_dict;
+ if (d1 == NULL || d2 == NULL)
+ {
+ if (d1 != d2)
+ return FALSE;
+ }
+ else if (!dict_equal(d1, d2, ic, TRUE))
+ return FALSE;
+
+ /* empty list and no list considered the same */
+ a1 = tv1->v_type == VAR_FUNC ? 0 : tv1->vval.v_partial->pt_argc;
+ a2 = tv2->v_type == VAR_FUNC ? 0 : tv2->vval.v_partial->pt_argc;
+ if (a1 != a2)
+ return FALSE;
+ for (i = 0; i < a1; ++i)
+ if (!tv_equal(tv1->vval.v_partial->pt_argv + i,
+ tv2->vval.v_partial->pt_argv + i, ic, TRUE))
+ return FALSE;
+
+ return TRUE;
+}
+
+/*
+ * Return TRUE if "tv1" and "tv2" have the same value.
+ * Compares the items just like "==" would compare them, but strings and
+ * numbers are different. Floats and numbers are also different.
+ */
+ int
+tv_equal(
+ typval_T *tv1,
+ typval_T *tv2,
+ int ic, /* ignore case */
+ int recursive) /* TRUE when used recursively */
+{
+ char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN];
+ char_u *s1, *s2;
+ static int recursive_cnt = 0; /* catch recursive loops */
+ int r;
+
+ /* Catch lists and dicts that have an endless loop by limiting
+ * recursiveness to a limit. We guess they are equal then.
+ * A fixed limit has the problem of still taking an awful long time.
+ * Reduce the limit every time running into it. That should work fine for
+ * deeply linked structures that are not recursively linked and catch
+ * recursiveness quickly. */
+ if (!recursive)
+ tv_equal_recurse_limit = 1000;
+ if (recursive_cnt >= tv_equal_recurse_limit)
+ {
+ --tv_equal_recurse_limit;
+ return TRUE;
+ }
+
+ /* For VAR_FUNC and VAR_PARTIAL compare the function name, bound dict and
+ * arguments. */
+ if ((tv1->v_type == VAR_FUNC
+ || (tv1->v_type == VAR_PARTIAL && tv1->vval.v_partial != NULL))
+ && (tv2->v_type == VAR_FUNC
+ || (tv2->v_type == VAR_PARTIAL && tv2->vval.v_partial != NULL)))
+ {
+ ++recursive_cnt;
+ r = func_equal(tv1, tv2, ic);
+ --recursive_cnt;
+ return r;
+ }
+
+ if (tv1->v_type != tv2->v_type)
+ return FALSE;
+
+ switch (tv1->v_type)
+ {
+ case VAR_LIST:
+ ++recursive_cnt;
+ r = list_equal(tv1->vval.v_list, tv2->vval.v_list, ic, TRUE);
+ --recursive_cnt;
+ return r;
+
+ case VAR_DICT:
+ ++recursive_cnt;
+ r = dict_equal(tv1->vval.v_dict, tv2->vval.v_dict, ic, TRUE);
+ --recursive_cnt;
+ return r;
+
+ case VAR_BLOB:
+ return blob_equal(tv1->vval.v_blob, tv2->vval.v_blob);
+
+ case VAR_NUMBER:
+ return tv1->vval.v_number == tv2->vval.v_number;
+
+ case VAR_STRING:
+ s1 = tv_get_string_buf(tv1, buf1);
+ s2 = tv_get_string_buf(tv2, buf2);
+ return ((ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2)) == 0);
+
+ case VAR_SPECIAL:
+ return tv1->vval.v_number == tv2->vval.v_number;
+
+ case VAR_FLOAT:
+#ifdef FEAT_FLOAT
+ return tv1->vval.v_float == tv2->vval.v_float;
+#endif
+ case VAR_JOB:
+#ifdef FEAT_JOB_CHANNEL
+ return tv1->vval.v_job == tv2->vval.v_job;
+#endif
+ case VAR_CHANNEL:
+#ifdef FEAT_JOB_CHANNEL
+ return tv1->vval.v_channel == tv2->vval.v_channel;
+#endif
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ case VAR_UNKNOWN:
+ break;
+ }
+
+ /* VAR_UNKNOWN can be the result of a invalid expression, let's say it
+ * does not equal anything, not even itself. */
+ return FALSE;
+}
+
+/*
+ * Return the next (unique) copy ID.
+ * Used for serializing nested structures.
+ */
+ int
+get_copyID(void)
+{
+ current_copyID += COPYID_INC;
+ return current_copyID;
+}
+
+/*
+ * Garbage collection for lists and dictionaries.
+ *
+ * We use reference counts to be able to free most items right away when they
+ * are no longer used. But for composite items it's possible that it becomes
+ * unused while the reference count is > 0: When there is a recursive
+ * reference. Example:
+ * :let l = [1, 2, 3]
+ * :let d = {9: l}
+ * :let l[1] = d
+ *
+ * Since this is quite unusual we handle this with garbage collection: every
+ * once in a while find out which lists and dicts are not referenced from any
+ * variable.
+ *
+ * Here is a good reference text about garbage collection (refers to Python
+ * but it applies to all reference-counting mechanisms):
+ * http://python.ca/nas/python/gc/
+ */
+
+/*
+ * Do garbage collection for lists and dicts.
+ * When "testing" is TRUE this is called from test_garbagecollect_now().
+ * Return TRUE if some memory was freed.
+ */
+ int
+garbage_collect(int testing)
+{
+ int copyID;
+ int abort = FALSE;
+ buf_T *buf;
+ win_T *wp;
+ int i;
+ int did_free = FALSE;
+ tabpage_T *tp;
+
+ if (!testing)
+ {
+ /* Only do this once. */
+ want_garbage_collect = FALSE;
+ may_garbage_collect = FALSE;
+ garbage_collect_at_exit = FALSE;
+ }
+
+ /* We advance by two because we add one for items referenced through
+ * previous_funccal. */
+ copyID = get_copyID();
+
+ /*
+ * 1. Go through all accessible variables and mark all lists and dicts
+ * with copyID.
+ */
+
+ /* Don't free variables in the previous_funccal list unless they are only
+ * referenced through previous_funccal. This must be first, because if
+ * the item is referenced elsewhere the funccal must not be freed. */
+ abort = abort || set_ref_in_previous_funccal(copyID);
+
+ /* script-local variables */
+ for (i = 1; i <= ga_scripts.ga_len; ++i)
+ abort = abort || set_ref_in_ht(&SCRIPT_VARS(i), copyID, NULL);
+
+ /* buffer-local variables */
+ FOR_ALL_BUFFERS(buf)
+ abort = abort || set_ref_in_item(&buf->b_bufvar.di_tv, copyID,
+ NULL, NULL);
+
+ /* window-local variables */
+ FOR_ALL_TAB_WINDOWS(tp, wp)
+ abort = abort || set_ref_in_item(&wp->w_winvar.di_tv, copyID,
+ NULL, NULL);
+ if (aucmd_win != NULL)
+ abort = abort || set_ref_in_item(&aucmd_win->w_winvar.di_tv, copyID,
+ NULL, NULL);
+
+ /* tabpage-local variables */
+ FOR_ALL_TABPAGES(tp)
+ abort = abort || set_ref_in_item(&tp->tp_winvar.di_tv, copyID,
+ NULL, NULL);
+ /* global variables */
+ abort = abort || set_ref_in_ht(&globvarht, copyID, NULL);
+
+ /* function-local variables */
+ abort = abort || set_ref_in_call_stack(copyID);
+
+ /* named functions (matters for closures) */
+ abort = abort || set_ref_in_functions(copyID);
+
+ /* function call arguments, if v:testing is set. */
+ abort = abort || set_ref_in_func_args(copyID);
+
+ /* v: vars */
+ abort = abort || set_ref_in_ht(&vimvarht, copyID, NULL);
+
+#ifdef FEAT_LUA
+ abort = abort || set_ref_in_lua(copyID);
+#endif
+
+#ifdef FEAT_PYTHON
+ abort = abort || set_ref_in_python(copyID);
+#endif
+
+#ifdef FEAT_PYTHON3
+ abort = abort || set_ref_in_python3(copyID);
+#endif
+
+#ifdef FEAT_JOB_CHANNEL
+ abort = abort || set_ref_in_channel(copyID);
+ abort = abort || set_ref_in_job(copyID);
+#endif
+#ifdef FEAT_NETBEANS_INTG
+ abort = abort || set_ref_in_nb_channel(copyID);
+#endif
+
+#ifdef FEAT_TIMERS
+ abort = abort || set_ref_in_timer(copyID);
+#endif
+
+#ifdef FEAT_QUICKFIX
+ abort = abort || set_ref_in_quickfix(copyID);
+#endif
+
+#ifdef FEAT_TERMINAL
+ abort = abort || set_ref_in_term(copyID);
+#endif
+
+ if (!abort)
+ {
+ /*
+ * 2. Free lists and dictionaries that are not referenced.
+ */
+ did_free = free_unref_items(copyID);
+
+ /*
+ * 3. Check if any funccal can be freed now.
+ * This may call us back recursively.
+ */
+ free_unref_funccal(copyID, testing);
+ }
+ else if (p_verbose > 0)
+ {
+ verb_msg(_("Not enough memory to set references, garbage collection aborted!"));
+ }
+
+ return did_free;
+}
+
+/*
+ * Free lists, dictionaries, channels and jobs that are no longer referenced.
+ */
+ static int
+free_unref_items(int copyID)
+{
+ int did_free = FALSE;
+
+ /* Let all "free" functions know that we are here. This means no
+ * dictionaries, lists, channels or jobs are to be freed, because we will
+ * do that here. */
+ in_free_unref_items = TRUE;
+
+ /*
+ * PASS 1: free the contents of the items. We don't free the items
+ * themselves yet, so that it is possible to decrement refcount counters
+ */
+
+ /* Go through the list of dicts and free items without the copyID. */
+ did_free |= dict_free_nonref(copyID);
+
+ /* Go through the list of lists and free items without the copyID. */
+ did_free |= list_free_nonref(copyID);
+
+#ifdef FEAT_JOB_CHANNEL
+ /* Go through the list of jobs and free items without the copyID. This
+ * must happen before doing channels, because jobs refer to channels, but
+ * the reference from the channel to the job isn't tracked. */
+ did_free |= free_unused_jobs_contents(copyID, COPYID_MASK);
+
+ /* Go through the list of channels and free items without the copyID. */
+ did_free |= free_unused_channels_contents(copyID, COPYID_MASK);
+#endif
+
+ /*
+ * PASS 2: free the items themselves.
+ */
+ dict_free_items(copyID);
+ list_free_items(copyID);
+
+#ifdef FEAT_JOB_CHANNEL
+ /* Go through the list of jobs and free items without the copyID. This
+ * must happen before doing channels, because jobs refer to channels, but
+ * the reference from the channel to the job isn't tracked. */
+ free_unused_jobs(copyID, COPYID_MASK);
+
+ /* Go through the list of channels and free items without the copyID. */
+ free_unused_channels(copyID, COPYID_MASK);
+#endif
+
+ in_free_unref_items = FALSE;
+
+ return did_free;
+}
+
+/*
+ * Mark all lists and dicts referenced through hashtab "ht" with "copyID".
+ * "list_stack" is used to add lists to be marked. Can be NULL.
+ *
+ * Returns TRUE if setting references failed somehow.
+ */
+ int
+set_ref_in_ht(hashtab_T *ht, int copyID, list_stack_T **list_stack)
+{
+ int todo;
+ int abort = FALSE;
+ hashitem_T *hi;
+ hashtab_T *cur_ht;
+ ht_stack_T *ht_stack = NULL;
+ ht_stack_T *tempitem;
+
+ cur_ht = ht;
+ for (;;)
+ {
+ if (!abort)
+ {
+ /* Mark each item in the hashtab. If the item contains a hashtab
+ * it is added to ht_stack, if it contains a list it is added to
+ * list_stack. */
+ todo = (int)cur_ht->ht_used;
+ for (hi = cur_ht->ht_array; todo > 0; ++hi)
+ if (!HASHITEM_EMPTY(hi))
+ {
+ --todo;
+ abort = abort || set_ref_in_item(&HI2DI(hi)->di_tv, copyID,
+ &ht_stack, list_stack);
+ }
+ }
+
+ if (ht_stack == NULL)
+ break;
+
+ /* take an item from the stack */
+ cur_ht = ht_stack->ht;
+ tempitem = ht_stack;
+ ht_stack = ht_stack->prev;
+ free(tempitem);
+ }
+
+ return abort;
+}
+
+/*
+ * Mark all lists and dicts referenced through list "l" with "copyID".
+ * "ht_stack" is used to add hashtabs to be marked. Can be NULL.
+ *
+ * Returns TRUE if setting references failed somehow.
+ */
+ int
+set_ref_in_list(list_T *l, int copyID, ht_stack_T **ht_stack)
+{
+ listitem_T *li;
+ int abort = FALSE;
+ list_T *cur_l;
+ list_stack_T *list_stack = NULL;
+ list_stack_T *tempitem;
+
+ cur_l = l;
+ for (;;)
+ {
+ if (!abort)
+ /* Mark each item in the list. If the item contains a hashtab
+ * it is added to ht_stack, if it contains a list it is added to
+ * list_stack. */
+ for (li = cur_l->lv_first; !abort && li != NULL; li = li->li_next)
+ abort = abort || set_ref_in_item(&li->li_tv, copyID,
+ ht_stack, &list_stack);
+ if (list_stack == NULL)
+ break;
+
+ /* take an item from the stack */
+ cur_l = list_stack->list;
+ tempitem = list_stack;
+ list_stack = list_stack->prev;
+ free(tempitem);
+ }
+
+ return abort;
+}
+
+/*
+ * Mark all lists and dicts referenced through typval "tv" with "copyID".
+ * "list_stack" is used to add lists to be marked. Can be NULL.
+ * "ht_stack" is used to add hashtabs to be marked. Can be NULL.
+ *
+ * Returns TRUE if setting references failed somehow.
+ */
+ int
+set_ref_in_item(
+ typval_T *tv,
+ int copyID,
+ ht_stack_T **ht_stack,
+ list_stack_T **list_stack)
+{
+ int abort = FALSE;
+
+ if (tv->v_type == VAR_DICT)
+ {
+ dict_T *dd = tv->vval.v_dict;
+
+ if (dd != NULL && dd->dv_copyID != copyID)
+ {
+ /* Didn't see this dict yet. */
+ dd->dv_copyID = copyID;
+ if (ht_stack == NULL)
+ {
+ abort = set_ref_in_ht(&dd->dv_hashtab, copyID, list_stack);
+ }
+ else
+ {
+ ht_stack_T *newitem = (ht_stack_T*)malloc(sizeof(ht_stack_T));
+ if (newitem == NULL)
+ abort = TRUE;
+ else
+ {
+ newitem->ht = &dd->dv_hashtab;
+ newitem->prev = *ht_stack;
+ *ht_stack = newitem;
+ }
+ }
+ }
+ }
+ else if (tv->v_type == VAR_LIST)
+ {
+ list_T *ll = tv->vval.v_list;
+
+ if (ll != NULL && ll->lv_copyID != copyID)
+ {
+ /* Didn't see this list yet. */
+ ll->lv_copyID = copyID;
+ if (list_stack == NULL)
+ {
+ abort = set_ref_in_list(ll, copyID, ht_stack);
+ }
+ else
+ {
+ list_stack_T *newitem = (list_stack_T*)malloc(
+ sizeof(list_stack_T));
+ if (newitem == NULL)
+ abort = TRUE;
+ else
+ {
+ newitem->list = ll;
+ newitem->prev = *list_stack;
+ *list_stack = newitem;
+ }
+ }
+ }
+ }
+ else if (tv->v_type == VAR_FUNC)
+ {
+ abort = set_ref_in_func(tv->vval.v_string, NULL, copyID);
+ }
+ else if (tv->v_type == VAR_PARTIAL)
+ {
+ partial_T *pt = tv->vval.v_partial;
+ int i;
+
+ /* A partial does not have a copyID, because it cannot contain itself.
+ */
+ if (pt != NULL)
+ {
+ abort = set_ref_in_func(pt->pt_name, pt->pt_func, copyID);
+
+ if (pt->pt_dict != NULL)
+ {
+ typval_T dtv;
+
+ dtv.v_type = VAR_DICT;
+ dtv.vval.v_dict = pt->pt_dict;
+ set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
+ }
+
+ for (i = 0; i < pt->pt_argc; ++i)
+ abort = abort || set_ref_in_item(&pt->pt_argv[i], copyID,
+ ht_stack, list_stack);
+ }
+ }
+#ifdef FEAT_JOB_CHANNEL
+ else if (tv->v_type == VAR_JOB)
+ {
+ job_T *job = tv->vval.v_job;
+ typval_T dtv;
+
+ if (job != NULL && job->jv_copyID != copyID)
+ {
+ job->jv_copyID = copyID;
+ if (job->jv_channel != NULL)
+ {
+ dtv.v_type = VAR_CHANNEL;
+ dtv.vval.v_channel = job->jv_channel;
+ set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
+ }
+ if (job->jv_exit_partial != NULL)
+ {
+ dtv.v_type = VAR_PARTIAL;
+ dtv.vval.v_partial = job->jv_exit_partial;
+ set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
+ }
+ }
+ }
+ else if (tv->v_type == VAR_CHANNEL)
+ {
+ channel_T *ch =tv->vval.v_channel;
+ ch_part_T part;
+ typval_T dtv;
+ jsonq_T *jq;
+ cbq_T *cq;
+
+ if (ch != NULL && ch->ch_copyID != copyID)
+ {
+ ch->ch_copyID = copyID;
+ for (part = PART_SOCK; part < PART_COUNT; ++part)
+ {
+ for (jq = ch->ch_part[part].ch_json_head.jq_next; jq != NULL;
+ jq = jq->jq_next)
+ set_ref_in_item(jq->jq_value, copyID, ht_stack, list_stack);
+ for (cq = ch->ch_part[part].ch_cb_head.cq_next; cq != NULL;
+ cq = cq->cq_next)
+ if (cq->cq_partial != NULL)
+ {
+ dtv.v_type = VAR_PARTIAL;
+ dtv.vval.v_partial = cq->cq_partial;
+ set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
+ }
+ if (ch->ch_part[part].ch_partial != NULL)
+ {
+ dtv.v_type = VAR_PARTIAL;
+ dtv.vval.v_partial = ch->ch_part[part].ch_partial;
+ set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
+ }
+ }
+ if (ch->ch_partial != NULL)
+ {
+ dtv.v_type = VAR_PARTIAL;
+ dtv.vval.v_partial = ch->ch_partial;
+ set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
+ }
+ if (ch->ch_close_partial != NULL)
+ {
+ dtv.v_type = VAR_PARTIAL;
+ dtv.vval.v_partial = ch->ch_close_partial;
+ set_ref_in_item(&dtv, copyID, ht_stack, list_stack);
+ }
+ }
+ }
+#endif
+ return abort;
+}
+
+ static char *
+get_var_special_name(int nr)
+{
+ switch (nr)
+ {
+ case VVAL_FALSE: return "v:false";
+ case VVAL_TRUE: return "v:true";
+ case VVAL_NONE: return "v:none";
+ case VVAL_NULL: return "v:null";
+ }
+ internal_error("get_var_special_name()");
+ return "42";
+}
+
+/*
+ * Return a string with the string representation of a variable.
+ * If the memory is allocated "tofree" is set to it, otherwise NULL.
+ * "numbuf" is used for a number.
+ * When "copyID" is not NULL replace recursive lists and dicts with "...".
+ * When both "echo_style" and "composite_val" are FALSE, put quotes around
+ * stings as "string()", otherwise does not put quotes around strings, as
+ * ":echo" displays values.
+ * When "restore_copyID" is FALSE, repeated items in dictionaries and lists
+ * are replaced with "...".
+ * May return NULL.
+ */
+ char_u *
+echo_string_core(
+ typval_T *tv,
+ char_u **tofree,
+ char_u *numbuf,
+ int copyID,
+ int echo_style,
+ int restore_copyID,
+ int composite_val)
+{
+ static int recurse = 0;
+ char_u *r = NULL;
+
+ if (recurse >= DICT_MAXNEST)
+ {
+ if (!did_echo_string_emsg)
+ {
+ /* Only give this message once for a recursive call to avoid
+ * flooding the user with errors. And stop iterating over lists
+ * and dicts. */
+ did_echo_string_emsg = TRUE;
+ emsg(_("E724: variable nested too deep for displaying"));
+ }
+ *tofree = NULL;
+ return (char_u *)"{E724}";
+ }
+ ++recurse;
+
+ switch (tv->v_type)
+ {
+ case VAR_STRING:
+ if (echo_style && !composite_val)
+ {
+ *tofree = NULL;
+ r = tv->vval.v_string;
+ if (r == NULL)
+ r = (char_u *)"";
+ }
+ else
+ {
+ *tofree = string_quote(tv->vval.v_string, FALSE);
+ r = *tofree;
+ }
+ break;
+
+ case VAR_FUNC:
+ if (echo_style)
+ {
+ *tofree = NULL;
+ r = tv->vval.v_string;
+ }
+ else
+ {
+ *tofree = string_quote(tv->vval.v_string, TRUE);
+ r = *tofree;
+ }
+ break;
+
+ case VAR_PARTIAL:
+ {
+ partial_T *pt = tv->vval.v_partial;
+ char_u *fname = string_quote(pt == NULL ? NULL
+ : partial_name(pt), FALSE);
+ garray_T ga;
+ int i;
+ char_u *tf;
+
+ ga_init2(&ga, 1, 100);
+ ga_concat(&ga, (char_u *)"function(");
+ if (fname != NULL)
+ {
+ ga_concat(&ga, fname);
+ vim_free(fname);
+ }
+ if (pt != NULL && pt->pt_argc > 0)
+ {
+ ga_concat(&ga, (char_u *)", [");
+ for (i = 0; i < pt->pt_argc; ++i)
+ {
+ if (i > 0)
+ ga_concat(&ga, (char_u *)", ");
+ ga_concat(&ga,
+ tv2string(&pt->pt_argv[i], &tf, numbuf, copyID));
+ vim_free(tf);
+ }
+ ga_concat(&ga, (char_u *)"]");
+ }
+ if (pt != NULL && pt->pt_dict != NULL)
+ {
+ typval_T dtv;
+
+ ga_concat(&ga, (char_u *)", ");
+ dtv.v_type = VAR_DICT;
+ dtv.vval.v_dict = pt->pt_dict;
+ ga_concat(&ga, tv2string(&dtv, &tf, numbuf, copyID));
+ vim_free(tf);
+ }
+ ga_concat(&ga, (char_u *)")");
+
+ *tofree = ga.ga_data;
+ r = *tofree;
+ break;
+ }
+
+ case VAR_BLOB:
+ r = blob2string(tv->vval.v_blob, tofree, numbuf);
+ break;
+
+ case VAR_LIST:
+ if (tv->vval.v_list == NULL)
+ {
+ *tofree = NULL;
+ r = NULL;
+ }
+ else if (copyID != 0 && tv->vval.v_list->lv_copyID == copyID
+ && tv->vval.v_list->lv_len > 0)
+ {
+ *tofree = NULL;
+ r = (char_u *)"[...]";
+ }
+ else
+ {
+ int old_copyID = tv->vval.v_list->lv_copyID;
+
+ tv->vval.v_list->lv_copyID = copyID;
+ *tofree = list2string(tv, copyID, restore_copyID);
+ if (restore_copyID)
+ tv->vval.v_list->lv_copyID = old_copyID;
+ r = *tofree;
+ }
+ break;
+
+ case VAR_DICT:
+ if (tv->vval.v_dict == NULL)
+ {
+ *tofree = NULL;
+ r = NULL;
+ }
+ else if (copyID != 0 && tv->vval.v_dict->dv_copyID == copyID
+ && tv->vval.v_dict->dv_hashtab.ht_used != 0)
+ {
+ *tofree = NULL;
+ r = (char_u *)"{...}";
+ }
+ else
+ {
+ int old_copyID = tv->vval.v_dict->dv_copyID;
+ tv->vval.v_dict->dv_copyID = copyID;
+ *tofree = dict2string(tv, copyID, restore_copyID);
+ if (restore_copyID)
+ tv->vval.v_dict->dv_copyID = old_copyID;
+ r = *tofree;
+ }
+ break;
+
+ case VAR_NUMBER:
+ case VAR_UNKNOWN:
+ *tofree = NULL;
+ r = tv_get_string_buf(tv, numbuf);
+ break;
+
+ case VAR_JOB:
+ case VAR_CHANNEL:
+ *tofree = NULL;
+ r = tv_get_string_buf(tv, numbuf);
+ if (composite_val)
+ {
+ *tofree = string_quote(r, FALSE);
+ r = *tofree;
+ }
+ break;
+
+ case VAR_FLOAT:
+#ifdef FEAT_FLOAT
+ *tofree = NULL;
+ vim_snprintf((char *)numbuf, NUMBUFLEN, "%g", tv->vval.v_float);
+ r = numbuf;
+ break;
+#endif
+
+ case VAR_SPECIAL:
+ *tofree = NULL;
+ r = (char_u *)get_var_special_name(tv->vval.v_number);
+ break;
+ }
+
+ if (--recurse == 0)
+ did_echo_string_emsg = FALSE;
+ return r;
+}
+
+/*
+ * Return a string with the string representation of a variable.
+ * If the memory is allocated "tofree" is set to it, otherwise NULL.
+ * "numbuf" is used for a number.
+ * Does not put quotes around strings, as ":echo" displays values.
+ * When "copyID" is not NULL replace recursive lists and dicts with "...".
+ * May return NULL.
+ */
+ char_u *
+echo_string(
+ typval_T *tv,
+ char_u **tofree,
+ char_u *numbuf,
+ int copyID)
+{
+ return echo_string_core(tv, tofree, numbuf, copyID, TRUE, FALSE, FALSE);
+}
+
+/*
+ * Return a string with the string representation of a variable.
+ * If the memory is allocated "tofree" is set to it, otherwise NULL.
+ * "numbuf" is used for a number.
+ * Puts quotes around strings, so that they can be parsed back by eval().
+ * May return NULL.
+ */
+ char_u *
+tv2string(
+ typval_T *tv,
+ char_u **tofree,
+ char_u *numbuf,
+ int copyID)
+{
+ return echo_string_core(tv, tofree, numbuf, copyID, FALSE, TRUE, FALSE);
+}
+
+/*
+ * Return string "str" in ' quotes, doubling ' characters.
+ * If "str" is NULL an empty string is assumed.
+ * If "function" is TRUE make it function('string').
+ */
+ char_u *
+string_quote(char_u *str, int function)
+{
+ unsigned len;
+ char_u *p, *r, *s;
+
+ len = (function ? 13 : 3);
+ if (str != NULL)
+ {
+ len += (unsigned)STRLEN(str);
+ for (p = str; *p != NUL; MB_PTR_ADV(p))
+ if (*p == '\'')
+ ++len;
+ }
+ s = r = alloc(len);
+ if (r != NULL)
+ {
+ if (function)
+ {
+ STRCPY(r, "function('");
+ r += 10;
+ }
+ else
+ *r++ = '\'';
+ if (str != NULL)
+ for (p = str; *p != NUL; )
+ {
+ if (*p == '\'')
+ *r++ = '\'';
+ MB_COPY_CHAR(p, r);
+ }
+ *r++ = '\'';
+ if (function)
+ *r++ = ')';
+ *r++ = NUL;
+ }
+ return s;
+}
+
+#if defined(FEAT_FLOAT) || defined(PROTO)
+/*
+ * Convert the string "text" to a floating point number.
+ * This uses strtod(). setlocale(LC_NUMERIC, "C") has been used to make sure
+ * this always uses a decimal point.
+ * Returns the length of the text that was consumed.
+ */
+ int
+string2float(
+ char_u *text,
+ float_T *value) /* result stored here */
+{
+ char *s = (char *)text;
+ float_T f;
+
+ /* MS-Windows does not deal with "inf" and "nan" properly. */
+ if (STRNICMP(text, "inf", 3) == 0)
+ {
+ *value = INFINITY;
+ return 3;
+ }
+ if (STRNICMP(text, "-inf", 3) == 0)
+ {
+ *value = -INFINITY;
+ return 4;
+ }
+ if (STRNICMP(text, "nan", 3) == 0)
+ {
+ *value = NAN;
+ return 3;
+ }
+ f = strtod(s, &s);
+ *value = f;
+ return (int)((char_u *)s - text);
+}
+#endif
+
+/*
+ * Get the value of an environment variable.
+ * "arg" is pointing to the '$'. It is advanced to after the name.
+ * If the environment variable was not set, silently assume it is empty.
+ * Return FAIL if the name is invalid.
+ */
+ static int
+get_env_tv(char_u **arg, typval_T *rettv, int evaluate)
+{
+ char_u *string = NULL;
+ int len;
+ int cc;
+ char_u *name;
+ int mustfree = FALSE;
+
+ ++*arg;
+ name = *arg;
+ len = get_env_len(arg);
+ if (evaluate)
+ {
+ if (len == 0)
+ return FAIL; /* invalid empty name */
+
+ cc = name[len];
+ name[len] = NUL;
+ /* first try vim_getenv(), fast for normal environment vars */
+ string = vim_getenv(name, &mustfree);
+ if (string != NULL && *string != NUL)
+ {
+ if (!mustfree)
+ string = vim_strsave(string);
+ }
+ else
+ {
+ if (mustfree)
+ vim_free(string);
+
+ /* next try expanding things like $VIM and ${HOME} */
+ string = expand_env_save(name - 1);
+ if (string != NULL && *string == '$')
+ VIM_CLEAR(string);
+ }
+ name[len] = cc;
+
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = string;
+ }
+
+ return OK;
+}
+
+
+
+/*
+ * Translate a String variable into a position.
+ * Returns NULL when there is an error.
+ */
+ pos_T *
+var2fpos(
+ typval_T *varp,
+ int dollar_lnum, /* TRUE when $ is last line */
+ int *fnum) /* set to fnum for '0, 'A, etc. */
+{
+ char_u *name;
+ static pos_T pos;
+ pos_T *pp;
+
+ /* Argument can be [lnum, col, coladd]. */
+ if (varp->v_type == VAR_LIST)
+ {
+ list_T *l;
+ int len;
+ int error = FALSE;
+ listitem_T *li;
+
+ l = varp->vval.v_list;
+ if (l == NULL)
+ return NULL;
+
+ /* Get the line number */
+ pos.lnum = list_find_nr(l, 0L, &error);
+ if (error || pos.lnum <= 0 || pos.lnum > curbuf->b_ml.ml_line_count)
+ return NULL; /* invalid line number */
+
+ /* Get the column number */
+ pos.col = list_find_nr(l, 1L, &error);
+ if (error)
+ return NULL;
+ len = (long)STRLEN(ml_get(pos.lnum));
+
+ /* We accept "$" for the column number: last column. */
+ li = list_find(l, 1L);
+ if (li != NULL && li->li_tv.v_type == VAR_STRING
+ && li->li_tv.vval.v_string != NULL
+ && STRCMP(li->li_tv.vval.v_string, "$") == 0)
+ pos.col = len + 1;
+
+ /* Accept a position up to the NUL after the line. */
+ if (pos.col == 0 || (int)pos.col > len + 1)
+ return NULL; /* invalid column number */
+ --pos.col;
+
+ /* Get the virtual offset. Defaults to zero. */
+ pos.coladd = list_find_nr(l, 2L, &error);
+ if (error)
+ pos.coladd = 0;
+
+ return &pos;
+ }
+
+ name = tv_get_string_chk(varp);
+ if (name == NULL)
+ return NULL;
+ if (name[0] == '.') /* cursor */
+ return &curwin->w_cursor;
+ if (name[0] == 'v' && name[1] == NUL) /* Visual start */
+ {
+ if (VIsual_active)
+ return &VIsual;
+ return &curwin->w_cursor;
+ }
+ if (name[0] == '\'') /* mark */
+ {
+ pp = getmark_buf_fnum(curbuf, name[1], FALSE, fnum);
+ if (pp == NULL || pp == (pos_T *)-1 || pp->lnum <= 0)
+ return NULL;
+ return pp;
+ }
+
+ pos.coladd = 0;
+
+ if (name[0] == 'w' && dollar_lnum)
+ {
+ pos.col = 0;
+ if (name[1] == '0') /* "w0": first visible line */
+ {
+ update_topline();
+ /* In silent Ex mode topline is zero, but that's not a valid line
+ * number; use one instead. */
+ pos.lnum = curwin->w_topline > 0 ? curwin->w_topline : 1;
+ return &pos;
+ }
+ else if (name[1] == '$') /* "w$": last visible line */
+ {
+ validate_botline();
+ /* In silent Ex mode botline is zero, return zero then. */
+ pos.lnum = curwin->w_botline > 0 ? curwin->w_botline - 1 : 0;
+ return &pos;
+ }
+ }
+ else if (name[0] == '$') /* last column or line */
+ {
+ if (dollar_lnum)
+ {
+ pos.lnum = curbuf->b_ml.ml_line_count;
+ pos.col = 0;
+ }
+ else
+ {
+ pos.lnum = curwin->w_cursor.lnum;
+ pos.col = (colnr_T)STRLEN(ml_get_curline());
+ }
+ return &pos;
+ }
+ return NULL;
+}
+
+/*
+ * Convert list in "arg" into a position and optional file number.
+ * When "fnump" is NULL there is no file number, only 3 items.
+ * Note that the column is passed on as-is, the caller may want to decrement
+ * it to use 1 for the first column.
+ * Return FAIL when conversion is not possible, doesn't check the position for
+ * validity.
+ */
+ int
+list2fpos(
+ typval_T *arg,
+ pos_T *posp,
+ int *fnump,
+ colnr_T *curswantp)
+{
+ list_T *l = arg->vval.v_list;
+ long i = 0;
+ long n;
+
+ /* List must be: [fnum, lnum, col, coladd, curswant], where "fnum" is only
+ * there when "fnump" isn't NULL; "coladd" and "curswant" are optional. */
+ if (arg->v_type != VAR_LIST
+ || l == NULL
+ || l->lv_len < (fnump == NULL ? 2 : 3)
+ || l->lv_len > (fnump == NULL ? 4 : 5))
+ return FAIL;
+
+ if (fnump != NULL)
+ {
+ n = list_find_nr(l, i++, NULL); /* fnum */
+ if (n < 0)
+ return FAIL;
+ if (n == 0)
+ n = curbuf->b_fnum; /* current buffer */
+ *fnump = n;
+ }
+
+ n = list_find_nr(l, i++, NULL); /* lnum */
+ if (n < 0)
+ return FAIL;
+ posp->lnum = n;
+
+ n = list_find_nr(l, i++, NULL); /* col */
+ if (n < 0)
+ return FAIL;
+ posp->col = n;
+
+ n = list_find_nr(l, i, NULL); /* off */
+ if (n < 0)
+ posp->coladd = 0;
+ else
+ posp->coladd = n;
+
+ if (curswantp != NULL)
+ *curswantp = list_find_nr(l, i + 1, NULL); /* curswant */
+
+ return OK;
+}
+
+/*
+ * Get the length of an environment variable name.
+ * Advance "arg" to the first character after the name.
+ * Return 0 for error.
+ */
+ static int
+get_env_len(char_u **arg)
+{
+ char_u *p;
+ int len;
+
+ for (p = *arg; vim_isIDc(*p); ++p)
+ ;
+ if (p == *arg) /* no name found */
+ return 0;
+
+ len = (int)(p - *arg);
+ *arg = p;
+ return len;
+}
+
+/*
+ * Get the length of the name of a function or internal variable.
+ * "arg" is advanced to the first non-white character after the name.
+ * Return 0 if something is wrong.
+ */
+ int
+get_id_len(char_u **arg)
+{
+ char_u *p;
+ int len;
+
+ /* Find the end of the name. */
+ for (p = *arg; eval_isnamec(*p); ++p)
+ {
+ if (*p == ':')
+ {
+ /* "s:" is start of "s:var", but "n:" is not and can be used in
+ * slice "[n:]". Also "xx:" is not a namespace. */
+ len = (int)(p - *arg);
+ if ((len == 1 && vim_strchr(NAMESPACE_CHAR, **arg) == NULL)
+ || len > 1)
+ break;
+ }
+ }
+ if (p == *arg) /* no name found */
+ return 0;
+
+ len = (int)(p - *arg);
+ *arg = skipwhite(p);
+
+ return len;
+}
+
+/*
+ * Get the length of the name of a variable or function.
+ * Only the name is recognized, does not handle ".key" or "[idx]".
+ * "arg" is advanced to the first non-white character after the name.
+ * Return -1 if curly braces expansion failed.
+ * Return 0 if something else is wrong.
+ * If the name contains 'magic' {}'s, expand them and return the
+ * expanded name in an allocated string via 'alias' - caller must free.
+ */
+ int
+get_name_len(
+ char_u **arg,
+ char_u **alias,
+ int evaluate,
+ int verbose)
+{
+ int len;
+ char_u *p;
+ char_u *expr_start;
+ char_u *expr_end;
+
+ *alias = NULL; /* default to no alias */
+
+ if ((*arg)[0] == K_SPECIAL && (*arg)[1] == KS_EXTRA
+ && (*arg)[2] == (int)KE_SNR)
+ {
+ /* hard coded <SNR>, already translated */
+ *arg += 3;
+ return get_id_len(arg) + 3;
+ }
+ len = eval_fname_script(*arg);
+ if (len > 0)
+ {
+ /* literal "<SID>", "s:" or "<SNR>" */
+ *arg += len;
+ }
+
+ /*
+ * Find the end of the name; check for {} construction.
+ */
+ p = find_name_end(*arg, &expr_start, &expr_end,
+ len > 0 ? 0 : FNE_CHECK_START);
+ if (expr_start != NULL)
+ {
+ char_u *temp_string;
+
+ if (!evaluate)
+ {
+ len += (int)(p - *arg);
+ *arg = skipwhite(p);
+ return len;
+ }
+
+ /*
+ * Include any <SID> etc in the expanded string:
+ * Thus the -len here.
+ */
+ temp_string = make_expanded_name(*arg - len, expr_start, expr_end, p);
+ if (temp_string == NULL)
+ return -1;
+ *alias = temp_string;
+ *arg = skipwhite(p);
+ return (int)STRLEN(temp_string);
+ }
+
+ len += get_id_len(arg);
+ // Only give an error when there is something, otherwise it will be
+ // reported at a higher level.
+ if (len == 0 && verbose && **arg != NUL)
+ semsg(_(e_invexpr2), *arg);
+
+ return len;
+}
+
+/*
+ * Find the end of a variable or function name, taking care of magic braces.
+ * If "expr_start" is not NULL then "expr_start" and "expr_end" are set to the
+ * start and end of the first magic braces item.
+ * "flags" can have FNE_INCL_BR and FNE_CHECK_START.
+ * Return a pointer to just after the name. Equal to "arg" if there is no
+ * valid name.
+ */
+ char_u *
+find_name_end(
+ char_u *arg,
+ char_u **expr_start,
+ char_u **expr_end,
+ int flags)
+{
+ int mb_nest = 0;
+ int br_nest = 0;
+ char_u *p;
+ int len;
+
+ if (expr_start != NULL)
+ {
+ *expr_start = NULL;
+ *expr_end = NULL;
+ }
+
+ /* Quick check for valid starting character. */
+ if ((flags & FNE_CHECK_START) && !eval_isnamec1(*arg) && *arg != '{')
+ return arg;
+
+ for (p = arg; *p != NUL
+ && (eval_isnamec(*p)
+ || *p == '{'
+ || ((flags & FNE_INCL_BR) && (*p == '[' || *p == '.'))
+ || mb_nest != 0
+ || br_nest != 0); MB_PTR_ADV(p))
+ {
+ if (*p == '\'')
+ {
+ /* skip over 'string' to avoid counting [ and ] inside it. */
+ for (p = p + 1; *p != NUL && *p != '\''; MB_PTR_ADV(p))
+ ;
+ if (*p == NUL)
+ break;
+ }
+ else if (*p == '"')
+ {
+ /* skip over "str\"ing" to avoid counting [ and ] inside it. */
+ for (p = p + 1; *p != NUL && *p != '"'; MB_PTR_ADV(p))
+ if (*p == '\\' && p[1] != NUL)
+ ++p;
+ if (*p == NUL)
+ break;
+ }
+ else if (br_nest == 0 && mb_nest == 0 && *p == ':')
+ {
+ /* "s:" is start of "s:var", but "n:" is not and can be used in
+ * slice "[n:]". Also "xx:" is not a namespace. But {ns}: is. */
+ len = (int)(p - arg);
+ if ((len == 1 && vim_strchr(NAMESPACE_CHAR, *arg) == NULL)
+ || (len > 1 && p[-1] != '}'))
+ break;
+ }
+
+ if (mb_nest == 0)
+ {
+ if (*p == '[')
+ ++br_nest;
+ else if (*p == ']')
+ --br_nest;
+ }
+
+ if (br_nest == 0)
+ {
+ if (*p == '{')
+ {
+ mb_nest++;
+ if (expr_start != NULL && *expr_start == NULL)
+ *expr_start = p;
+ }
+ else if (*p == '}')
+ {
+ mb_nest--;
+ if (expr_start != NULL && mb_nest == 0 && *expr_end == NULL)
+ *expr_end = p;
+ }
+ }
+ }
+
+ return p;
+}
+
+/*
+ * Expands out the 'magic' {}'s in a variable/function name.
+ * Note that this can call itself recursively, to deal with
+ * constructs like foo{bar}{baz}{bam}
+ * The four pointer arguments point to "foo{expre}ss{ion}bar"
+ * "in_start" ^
+ * "expr_start" ^
+ * "expr_end" ^
+ * "in_end" ^
+ *
+ * Returns a new allocated string, which the caller must free.
+ * Returns NULL for failure.
+ */
+ static char_u *
+make_expanded_name(
+ char_u *in_start,
+ char_u *expr_start,
+ char_u *expr_end,
+ char_u *in_end)
+{
+ char_u c1;
+ char_u *retval = NULL;
+ char_u *temp_result;
+ char_u *nextcmd = NULL;
+
+ if (expr_end == NULL || in_end == NULL)
+ return NULL;
+ *expr_start = NUL;
+ *expr_end = NUL;
+ c1 = *in_end;
+ *in_end = NUL;
+
+ temp_result = eval_to_string(expr_start + 1, &nextcmd, FALSE);
+ if (temp_result != NULL && nextcmd == NULL)
+ {
+ retval = alloc((unsigned)(STRLEN(temp_result) + (expr_start - in_start)
+ + (in_end - expr_end) + 1));
+ if (retval != NULL)
+ {
+ STRCPY(retval, in_start);
+ STRCAT(retval, temp_result);
+ STRCAT(retval, expr_end + 1);
+ }
+ }
+ vim_free(temp_result);
+
+ *in_end = c1; /* put char back for error messages */
+ *expr_start = '{';
+ *expr_end = '}';
+
+ if (retval != NULL)
+ {
+ temp_result = find_name_end(retval, &expr_start, &expr_end, 0);
+ if (expr_start != NULL)
+ {
+ /* Further expansion! */
+ temp_result = make_expanded_name(retval, expr_start,
+ expr_end, temp_result);
+ vim_free(retval);
+ retval = temp_result;
+ }
+ }
+
+ return retval;
+}
+
+/*
+ * Return TRUE if character "c" can be used in a variable or function name.
+ * Does not include '{' or '}' for magic braces.
+ */
+ int
+eval_isnamec(int c)
+{
+ return (ASCII_ISALNUM(c) || c == '_' || c == ':' || c == AUTOLOAD_CHAR);
+}
+
+/*
+ * Return TRUE if character "c" can be used as the first character in a
+ * variable or function name (excluding '{' and '}').
+ */
+ int
+eval_isnamec1(int c)
+{
+ return (ASCII_ISALPHA(c) || c == '_');
+}
+
+/*
+ * Set number v: variable to "val".
+ */
+ void
+set_vim_var_nr(int idx, varnumber_T val)
+{
+ vimvars[idx].vv_nr = val;
+}
+
+/*
+ * Get number v: variable value.
+ */
+ varnumber_T
+get_vim_var_nr(int idx)
+{
+ return vimvars[idx].vv_nr;
+}
+
+/*
+ * Get string v: variable value. Uses a static buffer, can only be used once.
+ * If the String variable has never been set, return an empty string.
+ * Never returns NULL;
+ */
+ char_u *
+get_vim_var_str(int idx)
+{
+ return tv_get_string(&vimvars[idx].vv_tv);
+}
+
+/*
+ * Get List v: variable value. Caller must take care of reference count when
+ * needed.
+ */
+ list_T *
+get_vim_var_list(int idx)
+{
+ return vimvars[idx].vv_list;
+}
+
+/*
+ * Get Dict v: variable value. Caller must take care of reference count when
+ * needed.
+ */
+ dict_T *
+get_vim_var_dict(int idx)
+{
+ return vimvars[idx].vv_dict;
+}
+
+/*
+ * Set v:char to character "c".
+ */
+ void
+set_vim_var_char(int c)
+{
+ char_u buf[MB_MAXBYTES + 1];
+
+ if (has_mbyte)
+ buf[(*mb_char2bytes)(c, buf)] = NUL;
+ else
+ {
+ buf[0] = c;
+ buf[1] = NUL;
+ }
+ set_vim_var_string(VV_CHAR, buf, -1);
+}
+
+/*
+ * Set v:count to "count" and v:count1 to "count1".
+ * When "set_prevcount" is TRUE first set v:prevcount from v:count.
+ */
+ void
+set_vcount(
+ long count,
+ long count1,
+ int set_prevcount)
+{
+ if (set_prevcount)
+ vimvars[VV_PREVCOUNT].vv_nr = vimvars[VV_COUNT].vv_nr;
+ vimvars[VV_COUNT].vv_nr = count;
+ vimvars[VV_COUNT1].vv_nr = count1;
+}
+
+/*
+ * Save variables that might be changed as a side effect. Used when executing
+ * a timer callback.
+ */
+ void
+save_vimvars(vimvars_save_T *vvsave)
+{
+ vvsave->vv_prevcount = vimvars[VV_PREVCOUNT].vv_nr;
+ vvsave->vv_count = vimvars[VV_COUNT].vv_nr;
+ vvsave->vv_count1 = vimvars[VV_COUNT1].vv_nr;
+}
+
+/*
+ * Restore variables saved by save_vimvars().
+ */
+ void
+restore_vimvars(vimvars_save_T *vvsave)
+{
+ vimvars[VV_PREVCOUNT].vv_nr = vvsave->vv_prevcount;
+ vimvars[VV_COUNT].vv_nr = vvsave->vv_count;
+ vimvars[VV_COUNT1].vv_nr = vvsave->vv_count1;
+}
+
+/*
+ * Set string v: variable to a copy of "val".
+ */
+ void
+set_vim_var_string(
+ int idx,
+ char_u *val,
+ int len) /* length of "val" to use or -1 (whole string) */
+{
+ clear_tv(&vimvars[idx].vv_di.di_tv);
+ vimvars[idx].vv_type = VAR_STRING;
+ if (val == NULL)
+ vimvars[idx].vv_str = NULL;
+ else if (len == -1)
+ vimvars[idx].vv_str = vim_strsave(val);
+ else
+ vimvars[idx].vv_str = vim_strnsave(val, len);
+}
+
+/*
+ * Set List v: variable to "val".
+ */
+ void
+set_vim_var_list(int idx, list_T *val)
+{
+ clear_tv(&vimvars[idx].vv_di.di_tv);
+ vimvars[idx].vv_type = VAR_LIST;
+ vimvars[idx].vv_list = val;
+ if (val != NULL)
+ ++val->lv_refcount;
+}
+
+/*
+ * Set Dictionary v: variable to "val".
+ */
+ void
+set_vim_var_dict(int idx, dict_T *val)
+{
+ clear_tv(&vimvars[idx].vv_di.di_tv);
+ vimvars[idx].vv_type = VAR_DICT;
+ vimvars[idx].vv_dict = val;
+ if (val != NULL)
+ {
+ ++val->dv_refcount;
+ dict_set_items_ro(val);
+ }
+}
+
+/*
+ * Set v:register if needed.
+ */
+ void
+set_reg_var(int c)
+{
+ char_u regname;
+
+ if (c == 0 || c == ' ')
+ regname = '"';
+ else
+ regname = c;
+ /* Avoid free/alloc when the value is already right. */
+ if (vimvars[VV_REG].vv_str == NULL || vimvars[VV_REG].vv_str[0] != c)
+ set_vim_var_string(VV_REG, &regname, 1);
+}
+
+/*
+ * Get or set v:exception. If "oldval" == NULL, return the current value.
+ * Otherwise, restore the value to "oldval" and return NULL.
+ * Must always be called in pairs to save and restore v:exception! Does not
+ * take care of memory allocations.
+ */
+ char_u *
+v_exception(char_u *oldval)
+{
+ if (oldval == NULL)
+ return vimvars[VV_EXCEPTION].vv_str;
+
+ vimvars[VV_EXCEPTION].vv_str = oldval;
+ return NULL;
+}
+
+/*
+ * Get or set v:throwpoint. If "oldval" == NULL, return the current value.
+ * Otherwise, restore the value to "oldval" and return NULL.
+ * Must always be called in pairs to save and restore v:throwpoint! Does not
+ * take care of memory allocations.
+ */
+ char_u *
+v_throwpoint(char_u *oldval)
+{
+ if (oldval == NULL)
+ return vimvars[VV_THROWPOINT].vv_str;
+
+ vimvars[VV_THROWPOINT].vv_str = oldval;
+ return NULL;
+}
+
+/*
+ * Set v:cmdarg.
+ * If "eap" != NULL, use "eap" to generate the value and return the old value.
+ * If "oldarg" != NULL, restore the value to "oldarg" and return NULL.
+ * Must always be called in pairs!
+ */
+ char_u *
+set_cmdarg(exarg_T *eap, char_u *oldarg)
+{
+ char_u *oldval;
+ char_u *newval;
+ unsigned len;
+
+ oldval = vimvars[VV_CMDARG].vv_str;
+ if (eap == NULL)
+ {
+ vim_free(oldval);
+ vimvars[VV_CMDARG].vv_str = oldarg;
+ return NULL;
+ }
+
+ if (eap->force_bin == FORCE_BIN)
+ len = 6;
+ else if (eap->force_bin == FORCE_NOBIN)
+ len = 8;
+ else
+ len = 0;
+
+ if (eap->read_edit)
+ len += 7;
+
+ if (eap->force_ff != 0)
+ len += 10; /* " ++ff=unix" */
+ if (eap->force_enc != 0)
+ len += (unsigned)STRLEN(eap->cmd + eap->force_enc) + 7;
+ if (eap->bad_char != 0)
+ len += 7 + 4; /* " ++bad=" + "keep" or "drop" */
+
+ newval = alloc(len + 1);
+ if (newval == NULL)
+ return NULL;
+
+ if (eap->force_bin == FORCE_BIN)
+ sprintf((char *)newval, " ++bin");
+ else if (eap->force_bin == FORCE_NOBIN)
+ sprintf((char *)newval, " ++nobin");
+ else
+ *newval = NUL;
+
+ if (eap->read_edit)
+ STRCAT(newval, " ++edit");
+
+ if (eap->force_ff != 0)
+ sprintf((char *)newval + STRLEN(newval), " ++ff=%s",
+ eap->force_ff == 'u' ? "unix"
+ : eap->force_ff == 'd' ? "dos"
+ : "mac");
+ if (eap->force_enc != 0)
+ sprintf((char *)newval + STRLEN(newval), " ++enc=%s",
+ eap->cmd + eap->force_enc);
+ if (eap->bad_char == BAD_KEEP)
+ STRCPY(newval + STRLEN(newval), " ++bad=keep");
+ else if (eap->bad_char == BAD_DROP)
+ STRCPY(newval + STRLEN(newval), " ++bad=drop");
+ else if (eap->bad_char != 0)
+ sprintf((char *)newval + STRLEN(newval), " ++bad=%c", eap->bad_char);
+ vimvars[VV_CMDARG].vv_str = newval;
+ return oldval;
+}
+
+/*
+ * Get the value of internal variable "name".
+ * Return OK or FAIL. If OK is returned "rettv" must be cleared.
+ */
+ int
+get_var_tv(
+ char_u *name,
+ int len, /* length of "name" */
+ typval_T *rettv, /* NULL when only checking existence */
+ dictitem_T **dip, /* non-NULL when typval's dict item is needed */
+ int verbose, /* may give error message */
+ int no_autoload) /* do not use script autoloading */
+{
+ int ret = OK;
+ typval_T *tv = NULL;
+ dictitem_T *v;
+ int cc;
+
+ /* truncate the name, so that we can use strcmp() */
+ cc = name[len];
+ name[len] = NUL;
+
+ /*
+ * Check for user-defined variables.
+ */
+ v = find_var(name, NULL, no_autoload);
+ if (v != NULL)
+ {
+ tv = &v->di_tv;
+ if (dip != NULL)
+ *dip = v;
+ }
+
+ if (tv == NULL)
+ {
+ if (rettv != NULL && verbose)
+ semsg(_(e_undefvar), name);
+ ret = FAIL;
+ }
+ else if (rettv != NULL)
+ copy_tv(tv, rettv);
+
+ name[len] = cc;
+
+ return ret;
+}
+
+/*
+ * Check if variable "name[len]" is a local variable or an argument.
+ * If so, "*eval_lavars_used" is set to TRUE.
+ */
+ static void
+check_vars(char_u *name, int len)
+{
+ int cc;
+ char_u *varname;
+ hashtab_T *ht;
+
+ if (eval_lavars_used == NULL)
+ return;
+
+ /* truncate the name, so that we can use strcmp() */
+ cc = name[len];
+ name[len] = NUL;
+
+ ht = find_var_ht(name, &varname);
+ if (ht == get_funccal_local_ht() || ht == get_funccal_args_ht())
+ {
+ if (find_var(name, NULL, TRUE) != NULL)
+ *eval_lavars_used = TRUE;
+ }
+
+ name[len] = cc;
+}
+
+/*
+ * Handle expr[expr], expr[expr:expr] subscript and .name lookup.
+ * Also handle function call with Funcref variable: func(expr)
+ * Can all be combined: dict.func(expr)[idx]['func'](expr)
+ */
+ int
+handle_subscript(
+ char_u **arg,
+ typval_T *rettv,
+ int evaluate, /* do more than finding the end */
+ int verbose) /* give error messages */
+{
+ int ret = OK;
+ dict_T *selfdict = NULL;
+ char_u *s;
+ int len;
+ typval_T functv;
+
+ while (ret == OK
+ && (**arg == '['
+ || (**arg == '.' && rettv->v_type == VAR_DICT)
+ || (**arg == '(' && (!evaluate || rettv->v_type == VAR_FUNC
+ || rettv->v_type == VAR_PARTIAL)))
+ && !VIM_ISWHITE(*(*arg - 1)))
+ {
+ if (**arg == '(')
+ {
+ partial_T *pt = NULL;
+
+ /* need to copy the funcref so that we can clear rettv */
+ if (evaluate)
+ {
+ functv = *rettv;
+ rettv->v_type = VAR_UNKNOWN;
+
+ /* Invoke the function. Recursive! */
+ if (functv.v_type == VAR_PARTIAL)
+ {
+ pt = functv.vval.v_partial;
+ s = partial_name(pt);
+ }
+ else
+ s = functv.vval.v_string;
+ }
+ else
+ s = (char_u *)"";
+ ret = get_func_tv(s, (int)STRLEN(s), rettv, arg,
+ curwin->w_cursor.lnum, curwin->w_cursor.lnum,
+ &len, evaluate, pt, selfdict);
+
+ /* Clear the funcref afterwards, so that deleting it while
+ * evaluating the arguments is possible (see test55). */
+ if (evaluate)
+ clear_tv(&functv);
+
+ /* Stop the expression evaluation when immediately aborting on
+ * error, or when an interrupt occurred or an exception was thrown
+ * but not caught. */
+ if (aborting())
+ {
+ if (ret == OK)
+ clear_tv(rettv);
+ ret = FAIL;
+ }
+ dict_unref(selfdict);
+ selfdict = NULL;
+ }
+ else /* **arg == '[' || **arg == '.' */
+ {
+ dict_unref(selfdict);
+ if (rettv->v_type == VAR_DICT)
+ {
+ selfdict = rettv->vval.v_dict;
+ if (selfdict != NULL)
+ ++selfdict->dv_refcount;
+ }
+ else
+ selfdict = NULL;
+ if (eval_index(arg, rettv, evaluate, verbose) == FAIL)
+ {
+ clear_tv(rettv);
+ ret = FAIL;
+ }
+ }
+ }
+
+ /* Turn "dict.Func" into a partial for "Func" bound to "dict".
+ * Don't do this when "Func" is already a partial that was bound
+ * explicitly (pt_auto is FALSE). */
+ if (selfdict != NULL
+ && (rettv->v_type == VAR_FUNC
+ || (rettv->v_type == VAR_PARTIAL
+ && (rettv->vval.v_partial->pt_auto
+ || rettv->vval.v_partial->pt_dict == NULL))))
+ selfdict = make_partial(selfdict, rettv);
+
+ dict_unref(selfdict);
+ return ret;
+}
+
+/*
+ * Allocate memory for a variable type-value, and make it empty (0 or NULL
+ * value).
+ */
+ typval_T *
+alloc_tv(void)
+{
+ return (typval_T *)alloc_clear((unsigned)sizeof(typval_T));
+}
+
+/*
+ * Allocate memory for a variable type-value, and assign a string to it.
+ * The string "s" must have been allocated, it is consumed.
+ * Return NULL for out of memory, the variable otherwise.
+ */
+ static typval_T *
+alloc_string_tv(char_u *s)
+{
+ typval_T *rettv;
+
+ rettv = alloc_tv();
+ if (rettv != NULL)
+ {
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = s;
+ }
+ else
+ vim_free(s);
+ return rettv;
+}
+
+/*
+ * Free the memory for a variable type-value.
+ */
+ void
+free_tv(typval_T *varp)
+{
+ if (varp != NULL)
+ {
+ switch (varp->v_type)
+ {
+ case VAR_FUNC:
+ func_unref(varp->vval.v_string);
+ /* FALLTHROUGH */
+ case VAR_STRING:
+ vim_free(varp->vval.v_string);
+ break;
+ case VAR_PARTIAL:
+ partial_unref(varp->vval.v_partial);
+ break;
+ case VAR_BLOB:
+ blob_unref(varp->vval.v_blob);
+ break;
+ case VAR_LIST:
+ list_unref(varp->vval.v_list);
+ break;
+ case VAR_DICT:
+ dict_unref(varp->vval.v_dict);
+ break;
+ case VAR_JOB:
+#ifdef FEAT_JOB_CHANNEL
+ job_unref(varp->vval.v_job);
+ break;
+#endif
+ case VAR_CHANNEL:
+#ifdef FEAT_JOB_CHANNEL
+ channel_unref(varp->vval.v_channel);
+ break;
+#endif
+ case VAR_NUMBER:
+ case VAR_FLOAT:
+ case VAR_UNKNOWN:
+ case VAR_SPECIAL:
+ break;
+ }
+ vim_free(varp);
+ }
+}
+
+/*
+ * Free the memory for a variable value and set the value to NULL or 0.
+ */
+ void
+clear_tv(typval_T *varp)
+{
+ if (varp != NULL)
+ {
+ switch (varp->v_type)
+ {
+ case VAR_FUNC:
+ func_unref(varp->vval.v_string);
+ /* FALLTHROUGH */
+ case VAR_STRING:
+ VIM_CLEAR(varp->vval.v_string);
+ break;
+ case VAR_PARTIAL:
+ partial_unref(varp->vval.v_partial);
+ varp->vval.v_partial = NULL;
+ break;
+ case VAR_BLOB:
+ blob_unref(varp->vval.v_blob);
+ varp->vval.v_blob = NULL;
+ break;
+ case VAR_LIST:
+ list_unref(varp->vval.v_list);
+ varp->vval.v_list = NULL;
+ break;
+ case VAR_DICT:
+ dict_unref(varp->vval.v_dict);
+ varp->vval.v_dict = NULL;
+ break;
+ case VAR_NUMBER:
+ case VAR_SPECIAL:
+ varp->vval.v_number = 0;
+ break;
+ case VAR_FLOAT:
+#ifdef FEAT_FLOAT
+ varp->vval.v_float = 0.0;
+ break;
+#endif
+ case VAR_JOB:
+#ifdef FEAT_JOB_CHANNEL
+ job_unref(varp->vval.v_job);
+ varp->vval.v_job = NULL;
+#endif
+ break;
+ case VAR_CHANNEL:
+#ifdef FEAT_JOB_CHANNEL
+ channel_unref(varp->vval.v_channel);
+ varp->vval.v_channel = NULL;
+#endif
+ case VAR_UNKNOWN:
+ break;
+ }
+ varp->v_lock = 0;
+ }
+}
+
+/*
+ * Set the value of a variable to NULL without freeing items.
+ */
+ void
+init_tv(typval_T *varp)
+{
+ if (varp != NULL)
+ vim_memset(varp, 0, sizeof(typval_T));
+}
+
+/*
+ * Get the number value of a variable.
+ * If it is a String variable, uses vim_str2nr().
+ * For incompatible types, return 0.
+ * tv_get_number_chk() is similar to tv_get_number(), but informs the
+ * caller of incompatible types: it sets *denote to TRUE if "denote"
+ * is not NULL or returns -1 otherwise.
+ */
+ varnumber_T
+tv_get_number(typval_T *varp)
+{
+ int error = FALSE;
+
+ return tv_get_number_chk(varp, &error); /* return 0L on error */
+}
+
+ varnumber_T
+tv_get_number_chk(typval_T *varp, int *denote)
+{
+ varnumber_T n = 0L;
+
+ switch (varp->v_type)
+ {
+ case VAR_NUMBER:
+ return varp->vval.v_number;
+ case VAR_FLOAT:
+#ifdef FEAT_FLOAT
+ emsg(_("E805: Using a Float as a Number"));
+ break;
+#endif
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ emsg(_("E703: Using a Funcref as a Number"));
+ break;
+ case VAR_STRING:
+ if (varp->vval.v_string != NULL)
+ vim_str2nr(varp->vval.v_string, NULL, NULL,
+ STR2NR_ALL, &n, NULL, 0);
+ return n;
+ case VAR_LIST:
+ emsg(_("E745: Using a List as a Number"));
+ break;
+ case VAR_DICT:
+ emsg(_("E728: Using a Dictionary as a Number"));
+ break;
+ case VAR_SPECIAL:
+ return varp->vval.v_number == VVAL_TRUE ? 1 : 0;
+ break;
+ case VAR_JOB:
+#ifdef FEAT_JOB_CHANNEL
+ emsg(_("E910: Using a Job as a Number"));
+ break;
+#endif
+ case VAR_CHANNEL:
+#ifdef FEAT_JOB_CHANNEL
+ emsg(_("E913: Using a Channel as a Number"));
+ break;
+#endif
+ case VAR_BLOB:
+ emsg(_("E974: Using a Blob as a Number"));
+ break;
+ case VAR_UNKNOWN:
+ internal_error("tv_get_number(UNKNOWN)");
+ break;
+ }
+ if (denote == NULL) /* useful for values that must be unsigned */
+ n = -1;
+ else
+ *denote = TRUE;
+ return n;
+}
+
+#ifdef FEAT_FLOAT
+ float_T
+tv_get_float(typval_T *varp)
+{
+ switch (varp->v_type)
+ {
+ case VAR_NUMBER:
+ return (float_T)(varp->vval.v_number);
+ case VAR_FLOAT:
+ return varp->vval.v_float;
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ emsg(_("E891: Using a Funcref as a Float"));
+ break;
+ case VAR_STRING:
+ emsg(_("E892: Using a String as a Float"));
+ break;
+ case VAR_LIST:
+ emsg(_("E893: Using a List as a Float"));
+ break;
+ case VAR_DICT:
+ emsg(_("E894: Using a Dictionary as a Float"));
+ break;
+ case VAR_SPECIAL:
+ emsg(_("E907: Using a special value as a Float"));
+ break;
+ case VAR_JOB:
+# ifdef FEAT_JOB_CHANNEL
+ emsg(_("E911: Using a Job as a Float"));
+ break;
+# endif
+ case VAR_CHANNEL:
+# ifdef FEAT_JOB_CHANNEL
+ emsg(_("E914: Using a Channel as a Float"));
+ break;
+# endif
+ case VAR_BLOB:
+ emsg(_("E975: Using a Blob as a Float"));
+ break;
+ case VAR_UNKNOWN:
+ internal_error("tv_get_float(UNKNOWN)");
+ break;
+ }
+ return 0;
+}
+#endif
+
+/*
+ * Get the string value of a variable.
+ * If it is a Number variable, the number is converted into a string.
+ * tv_get_string() uses a single, static buffer. YOU CAN ONLY USE IT ONCE!
+ * tv_get_string_buf() uses a given buffer.
+ * If the String variable has never been set, return an empty string.
+ * Never returns NULL;
+ * tv_get_string_chk() and tv_get_string_buf_chk() are similar, but return
+ * NULL on error.
+ */
+ char_u *
+tv_get_string(typval_T *varp)
+{
+ static char_u mybuf[NUMBUFLEN];
+
+ return tv_get_string_buf(varp, mybuf);
+}
+
+ char_u *
+tv_get_string_buf(typval_T *varp, char_u *buf)
+{
+ char_u *res = tv_get_string_buf_chk(varp, buf);
+
+ return res != NULL ? res : (char_u *)"";
+}
+
+/*
+ * Careful: This uses a single, static buffer. YOU CAN ONLY USE IT ONCE!
+ */
+ char_u *
+tv_get_string_chk(typval_T *varp)
+{
+ static char_u mybuf[NUMBUFLEN];
+
+ return tv_get_string_buf_chk(varp, mybuf);
+}
+
+ char_u *
+tv_get_string_buf_chk(typval_T *varp, char_u *buf)
+{
+ switch (varp->v_type)
+ {
+ case VAR_NUMBER:
+ vim_snprintf((char *)buf, NUMBUFLEN, "%lld",
+ (long_long_T)varp->vval.v_number);
+ return buf;
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ emsg(_("E729: using Funcref as a String"));
+ break;
+ case VAR_LIST:
+ emsg(_("E730: using List as a String"));
+ break;
+ case VAR_DICT:
+ emsg(_("E731: using Dictionary as a String"));
+ break;
+ case VAR_FLOAT:
+#ifdef FEAT_FLOAT
+ emsg(_(e_float_as_string));
+ break;
+#endif
+ case VAR_STRING:
+ if (varp->vval.v_string != NULL)
+ return varp->vval.v_string;
+ return (char_u *)"";
+ case VAR_SPECIAL:
+ STRCPY(buf, get_var_special_name(varp->vval.v_number));
+ return buf;
+ case VAR_BLOB:
+ emsg(_("E976: using Blob as a String"));
+ break;
+ case VAR_JOB:
+#ifdef FEAT_JOB_CHANNEL
+ {
+ job_T *job = varp->vval.v_job;
+ char *status;
+
+ if (job == NULL)
+ return (char_u *)"no process";
+ status = job->jv_status == JOB_FAILED ? "fail"
+ : job->jv_status >= JOB_ENDED ? "dead"
+ : "run";
+# ifdef UNIX
+ vim_snprintf((char *)buf, NUMBUFLEN,
+ "process %ld %s", (long)job->jv_pid, status);
+# elif defined(WIN32)
+ vim_snprintf((char *)buf, NUMBUFLEN,
+ "process %ld %s",
+ (long)job->jv_proc_info.dwProcessId,
+ status);
+# else
+ /* fall-back */
+ vim_snprintf((char *)buf, NUMBUFLEN, "process ? %s", status);
+# endif
+ return buf;
+ }
+#endif
+ break;
+ case VAR_CHANNEL:
+#ifdef FEAT_JOB_CHANNEL
+ {
+ channel_T *channel = varp->vval.v_channel;
+ char *status = channel_status(channel, -1);
+
+ if (channel == NULL)
+ vim_snprintf((char *)buf, NUMBUFLEN, "channel %s", status);
+ else
+ vim_snprintf((char *)buf, NUMBUFLEN,
+ "channel %d %s", channel->ch_id, status);
+ return buf;
+ }
+#endif
+ break;
+ case VAR_UNKNOWN:
+ emsg(_("E908: using an invalid value as a String"));
+ break;
+ }
+ return NULL;
+}
+
+/*
+ * Turn a typeval into a string. Similar to tv_get_string_buf() but uses
+ * string() on Dict, List, etc.
+ */
+ char_u *
+tv_stringify(typval_T *varp, char_u *buf)
+{
+ if (varp->v_type == VAR_LIST
+ || varp->v_type == VAR_DICT
+ || varp->v_type == VAR_FUNC
+ || varp->v_type == VAR_PARTIAL
+ || varp->v_type == VAR_FLOAT)
+ {
+ typval_T tmp;
+
+ f_string(varp, &tmp);
+ tv_get_string_buf(&tmp, buf);
+ clear_tv(varp);
+ *varp = tmp;
+ return tmp.vval.v_string;
+ }
+ return tv_get_string_buf(varp, buf);
+}
+
+/*
+ * Find variable "name" in the list of variables.
+ * Return a pointer to it if found, NULL if not found.
+ * Careful: "a:0" variables don't have a name.
+ * When "htp" is not NULL we are writing to the variable, set "htp" to the
+ * hashtab_T used.
+ */
+ dictitem_T *
+find_var(char_u *name, hashtab_T **htp, int no_autoload)
+{
+ char_u *varname;
+ hashtab_T *ht;
+ dictitem_T *ret = NULL;
+
+ ht = find_var_ht(name, &varname);
+ if (htp != NULL)
+ *htp = ht;
+ if (ht == NULL)
+ return NULL;
+ ret = find_var_in_ht(ht, *name, varname, no_autoload || htp != NULL);
+ if (ret != NULL)
+ return ret;
+
+ /* Search in parent scope for lambda */
+ return find_var_in_scoped_ht(name, no_autoload || htp != NULL);
+}
+
+/*
+ * Find variable "varname" in hashtab "ht" with name "htname".
+ * Returns NULL if not found.
+ */
+ dictitem_T *
+find_var_in_ht(
+ hashtab_T *ht,
+ int htname,
+ char_u *varname,
+ int no_autoload)
+{
+ hashitem_T *hi;
+
+ if (*varname == NUL)
+ {
+ /* Must be something like "s:", otherwise "ht" would be NULL. */
+ switch (htname)
+ {
+ case 's': return &SCRIPT_SV(current_sctx.sc_sid)->sv_var;
+ case 'g': return &globvars_var;
+ case 'v': return &vimvars_var;
+ case 'b': return &curbuf->b_bufvar;
+ case 'w': return &curwin->w_winvar;
+ case 't': return &curtab->tp_winvar;
+ case 'l': return get_funccal_local_var();
+ case 'a': return get_funccal_args_var();
+ }
+ return NULL;
+ }
+
+ hi = hash_find(ht, varname);
+ if (HASHITEM_EMPTY(hi))
+ {
+ /* For global variables we may try auto-loading the script. If it
+ * worked find the variable again. Don't auto-load a script if it was
+ * loaded already, otherwise it would be loaded every time when
+ * checking if a function name is a Funcref variable. */
+ if (ht == &globvarht && !no_autoload)
+ {
+ /* Note: script_autoload() may make "hi" invalid. It must either
+ * be obtained again or not used. */
+ if (!script_autoload(varname, FALSE) || aborting())
+ return NULL;
+ hi = hash_find(ht, varname);
+ }
+ if (HASHITEM_EMPTY(hi))
+ return NULL;
+ }
+ return HI2DI(hi);
+}
+
+/*
+ * Find the hashtab used for a variable name.
+ * Return NULL if the name is not valid.
+ * Set "varname" to the start of name without ':'.
+ */
+ hashtab_T *
+find_var_ht(char_u *name, char_u **varname)
+{
+ hashitem_T *hi;
+ hashtab_T *ht;
+
+ if (name[0] == NUL)
+ return NULL;
+ if (name[1] != ':')
+ {
+ /* The name must not start with a colon or #. */
+ if (name[0] == ':' || name[0] == AUTOLOAD_CHAR)
+ return NULL;
+ *varname = name;
+
+ /* "version" is "v:version" in all scopes */
+ hi = hash_find(&compat_hashtab, name);
+ if (!HASHITEM_EMPTY(hi))
+ return &compat_hashtab;
+
+ ht = get_funccal_local_ht();
+ if (ht == NULL)
+ return &globvarht; /* global variable */
+ return ht; /* local variable */
+ }
+ *varname = name + 2;
+ if (*name == 'g') /* global variable */
+ return &globvarht;
+ /* There must be no ':' or '#' in the rest of the name, unless g: is used
+ */
+ if (vim_strchr(name + 2, ':') != NULL
+ || vim_strchr(name + 2, AUTOLOAD_CHAR) != NULL)
+ return NULL;
+ if (*name == 'b') /* buffer variable */
+ return &curbuf->b_vars->dv_hashtab;
+ if (*name == 'w') /* window variable */
+ return &curwin->w_vars->dv_hashtab;
+ if (*name == 't') /* tab page variable */
+ return &curtab->tp_vars->dv_hashtab;
+ if (*name == 'v') /* v: variable */
+ return &vimvarht;
+ if (*name == 'a') /* a: function argument */
+ return get_funccal_args_ht();
+ if (*name == 'l') /* l: local function variable */
+ return get_funccal_local_ht();
+ if (*name == 's' /* script variable */
+ && current_sctx.sc_sid > 0 && current_sctx.sc_sid <= ga_scripts.ga_len)
+ return &SCRIPT_VARS(current_sctx.sc_sid);
+ return NULL;
+}
+
+/*
+ * Get the string value of a (global/local) variable.
+ * Note: see tv_get_string() for how long the pointer remains valid.
+ * Returns NULL when it doesn't exist.
+ */
+ char_u *
+get_var_value(char_u *name)
+{
+ dictitem_T *v;
+
+ v = find_var(name, NULL, FALSE);
+ if (v == NULL)
+ return NULL;
+ return tv_get_string(&v->di_tv);
+}
+
+/*
+ * Allocate a new hashtab for a sourced script. It will be used while
+ * sourcing this script and when executing functions defined in the script.
+ */
+ void
+new_script_vars(scid_T id)
+{
+ int i;
+ hashtab_T *ht;
+ scriptvar_T *sv;
+
+ if (ga_grow(&ga_scripts, (int)(id - ga_scripts.ga_len)) == OK)
+ {
+ /* Re-allocating ga_data means that an ht_array pointing to
+ * ht_smallarray becomes invalid. We can recognize this: ht_mask is
+ * at its init value. Also reset "v_dict", it's always the same. */
+ for (i = 1; i <= ga_scripts.ga_len; ++i)
+ {
+ ht = &SCRIPT_VARS(i);
+ if (ht->ht_mask == HT_INIT_SIZE - 1)
+ ht->ht_array = ht->ht_smallarray;
+ sv = SCRIPT_SV(i);
+ sv->sv_var.di_tv.vval.v_dict = &sv->sv_dict;
+ }
+
+ while (ga_scripts.ga_len < id)
+ {
+ sv = SCRIPT_SV(ga_scripts.ga_len + 1) =
+ (scriptvar_T *)alloc_clear(sizeof(scriptvar_T));
+ init_var_dict(&sv->sv_dict, &sv->sv_var, VAR_SCOPE);
+ ++ga_scripts.ga_len;
+ }
+ }
+}
+
+/*
+ * Initialize dictionary "dict" as a scope and set variable "dict_var" to
+ * point to it.
+ */
+ void
+init_var_dict(dict_T *dict, dictitem_T *dict_var, int scope)
+{
+ hash_init(&dict->dv_hashtab);
+ dict->dv_lock = 0;
+ dict->dv_scope = scope;
+ dict->dv_refcount = DO_NOT_FREE_CNT;
+ dict->dv_copyID = 0;
+ dict_var->di_tv.vval.v_dict = dict;
+ dict_var->di_tv.v_type = VAR_DICT;
+ dict_var->di_tv.v_lock = VAR_FIXED;
+ dict_var->di_flags = DI_FLAGS_RO | DI_FLAGS_FIX;
+ dict_var->di_key[0] = NUL;
+}
+
+/*
+ * Unreference a dictionary initialized by init_var_dict().
+ */
+ void
+unref_var_dict(dict_T *dict)
+{
+ /* Now the dict needs to be freed if no one else is using it, go back to
+ * normal reference counting. */
+ dict->dv_refcount -= DO_NOT_FREE_CNT - 1;
+ dict_unref(dict);
+}
+
+/*
+ * Clean up a list of internal variables.
+ * Frees all allocated variables and the value they contain.
+ * Clears hashtab "ht", does not free it.
+ */
+ void
+vars_clear(hashtab_T *ht)
+{
+ vars_clear_ext(ht, TRUE);
+}
+
+/*
+ * Like vars_clear(), but only free the value if "free_val" is TRUE.
+ */
+ void
+vars_clear_ext(hashtab_T *ht, int free_val)
+{
+ int todo;
+ hashitem_T *hi;
+ dictitem_T *v;
+
+ hash_lock(ht);
+ todo = (int)ht->ht_used;
+ for (hi = ht->ht_array; todo > 0; ++hi)
+ {
+ if (!HASHITEM_EMPTY(hi))
+ {
+ --todo;
+
+ /* Free the variable. Don't remove it from the hashtab,
+ * ht_array might change then. hash_clear() takes care of it
+ * later. */
+ v = HI2DI(hi);
+ if (free_val)
+ clear_tv(&v->di_tv);
+ if (v->di_flags & DI_FLAGS_ALLOC)
+ vim_free(v);
+ }
+ }
+ hash_clear(ht);
+ ht->ht_used = 0;
+}
+
+/*
+ * Delete a variable from hashtab "ht" at item "hi".
+ * Clear the variable value and free the dictitem.
+ */
+ static void
+delete_var(hashtab_T *ht, hashitem_T *hi)
+{
+ dictitem_T *di = HI2DI(hi);
+
+ hash_remove(ht, hi);
+ clear_tv(&di->di_tv);
+ vim_free(di);
+}
+
+/*
+ * List the value of one internal variable.
+ */
+ static void
+list_one_var(dictitem_T *v, char *prefix, int *first)
+{
+ char_u *tofree;
+ char_u *s;
+ char_u numbuf[NUMBUFLEN];
+
+ s = echo_string(&v->di_tv, &tofree, numbuf, get_copyID());
+ list_one_var_a(prefix, v->di_key, v->di_tv.v_type,
+ s == NULL ? (char_u *)"" : s, first);
+ vim_free(tofree);
+}
+
+ static void
+list_one_var_a(
+ char *prefix,
+ char_u *name,
+ int type,
+ char_u *string,
+ int *first) /* when TRUE clear rest of screen and set to FALSE */
+{
+ /* don't use msg() or msg_attr() to avoid overwriting "v:statusmsg" */
+ msg_start();
+ msg_puts(prefix);
+ if (name != NULL) /* "a:" vars don't have a name stored */
+ msg_puts((char *)name);
+ msg_putchar(' ');
+ msg_advance(22);
+ if (type == VAR_NUMBER)
+ msg_putchar('#');
+ else if (type == VAR_FUNC || type == VAR_PARTIAL)
+ msg_putchar('*');
+ else if (type == VAR_LIST)
+ {
+ msg_putchar('[');
+ if (*string == '[')
+ ++string;
+ }
+ else if (type == VAR_DICT)
+ {
+ msg_putchar('{');
+ if (*string == '{')
+ ++string;
+ }
+ else
+ msg_putchar(' ');
+
+ msg_outtrans(string);
+
+ if (type == VAR_FUNC || type == VAR_PARTIAL)
+ msg_puts("()");
+ if (*first)
+ {
+ msg_clr_eos();
+ *first = FALSE;
+ }
+}
+
+/*
+ * Set variable "name" to value in "tv".
+ * If the variable already exists, the value is updated.
+ * Otherwise the variable is created.
+ */
+ void
+set_var(
+ char_u *name,
+ typval_T *tv,
+ int copy) /* make copy of value in "tv" */
+{
+ dictitem_T *v;
+ char_u *varname;
+ hashtab_T *ht;
+
+ ht = find_var_ht(name, &varname);
+ if (ht == NULL || *varname == NUL)
+ {
+ semsg(_(e_illvar), name);
+ return;
+ }
+ v = find_var_in_ht(ht, 0, varname, TRUE);
+
+ /* Search in parent scope which is possible to reference from lambda */
+ if (v == NULL)
+ v = find_var_in_scoped_ht(name, TRUE);
+
+ if ((tv->v_type == VAR_FUNC || tv->v_type == VAR_PARTIAL)
+ && var_check_func_name(name, v == NULL))
+ return;
+
+ if (v != NULL)
+ {
+ /* existing variable, need to clear the value */
+ if (var_check_ro(v->di_flags, name, FALSE)
+ || tv_check_lock(v->di_tv.v_lock, name, FALSE))
+ return;
+
+ /*
+ * Handle setting internal v: variables separately where needed to
+ * prevent changing the type.
+ */
+ if (ht == &vimvarht)
+ {
+ if (v->di_tv.v_type == VAR_STRING)
+ {
+ VIM_CLEAR(v->di_tv.vval.v_string);
+ if (copy || tv->v_type != VAR_STRING)
+ {
+ char_u *val = tv_get_string(tv);
+
+ // Careful: when assigning to v:errmsg and tv_get_string()
+ // causes an error message the variable will alrady be set.
+ if (v->di_tv.vval.v_string == NULL)
+ v->di_tv.vval.v_string = vim_strsave(val);
+ }
+ else
+ {
+ /* Take over the string to avoid an extra alloc/free. */
+ v->di_tv.vval.v_string = tv->vval.v_string;
+ tv->vval.v_string = NULL;
+ }
+ return;
+ }
+ else if (v->di_tv.v_type == VAR_NUMBER)
+ {
+ v->di_tv.vval.v_number = tv_get_number(tv);
+ if (STRCMP(varname, "searchforward") == 0)
+ set_search_direction(v->di_tv.vval.v_number ? '/' : '?');
+#ifdef FEAT_SEARCH_EXTRA
+ else if (STRCMP(varname, "hlsearch") == 0)
+ {
+ no_hlsearch = !v->di_tv.vval.v_number;
+ redraw_all_later(SOME_VALID);
+ }
+#endif
+ return;
+ }
+ else if (v->di_tv.v_type != tv->v_type)
+ {
+ semsg(_("E963: setting %s to value with wrong type"), name);
+ return;
+ }
+ }
+
+ clear_tv(&v->di_tv);
+ }
+ else /* add a new variable */
+ {
+ /* Can't add "v:" variable. */
+ if (ht == &vimvarht)
+ {
+ semsg(_(e_illvar), name);
+ return;
+ }
+
+ /* Make sure the variable name is valid. */
+ if (!valid_varname(varname))
+ return;
+
+ v = (dictitem_T *)alloc((unsigned)(sizeof(dictitem_T)
+ + STRLEN(varname)));
+ if (v == NULL)
+ return;
+ STRCPY(v->di_key, varname);
+ if (hash_add(ht, DI2HIKEY(v)) == FAIL)
+ {
+ vim_free(v);
+ return;
+ }
+ v->di_flags = DI_FLAGS_ALLOC;
+ }
+
+ if (copy || tv->v_type == VAR_NUMBER || tv->v_type == VAR_FLOAT)
+ copy_tv(tv, &v->di_tv);
+ else
+ {
+ v->di_tv = *tv;
+ v->di_tv.v_lock = 0;
+ init_tv(tv);
+ }
+}
+
+/*
+ * Return TRUE if di_flags "flags" indicates variable "name" is read-only.
+ * Also give an error message.
+ */
+ int
+var_check_ro(int flags, char_u *name, int use_gettext)
+{
+ if (flags & DI_FLAGS_RO)
+ {
+ semsg(_(e_readonlyvar), use_gettext ? (char_u *)_(name) : name);
+ return TRUE;
+ }
+ if ((flags & DI_FLAGS_RO_SBX) && sandbox)
+ {
+ semsg(_(e_readonlysbx), use_gettext ? (char_u *)_(name) : name);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*
+ * Return TRUE if di_flags "flags" indicates variable "name" is fixed.
+ * Also give an error message.
+ */
+ int
+var_check_fixed(int flags, char_u *name, int use_gettext)
+{
+ if (flags & DI_FLAGS_FIX)
+ {
+ semsg(_("E795: Cannot delete variable %s"),
+ use_gettext ? (char_u *)_(name) : name);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*
+ * Check if a funcref is assigned to a valid variable name.
+ * Return TRUE and give an error if not.
+ */
+ int
+var_check_func_name(
+ char_u *name, /* points to start of variable name */
+ int new_var) /* TRUE when creating the variable */
+{
+ /* Allow for w: b: s: and t:. */
+ if (!(vim_strchr((char_u *)"wbst", name[0]) != NULL && name[1] == ':')
+ && !ASCII_ISUPPER((name[0] != NUL && name[1] == ':')
+ ? name[2] : name[0]))
+ {
+ semsg(_("E704: Funcref variable name must start with a capital: %s"),
+ name);
+ return TRUE;
+ }
+ /* Don't allow hiding a function. When "v" is not NULL we might be
+ * assigning another function to the same var, the type is checked
+ * below. */
+ if (new_var && function_exists(name, FALSE))
+ {
+ semsg(_("E705: Variable name conflicts with existing function: %s"),
+ name);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*
+ * Check if a variable name is valid.
+ * Return FALSE and give an error if not.
+ */
+ int
+valid_varname(char_u *varname)
+{
+ char_u *p;
+
+ for (p = varname; *p != NUL; ++p)
+ if (!eval_isnamec1(*p) && (p == varname || !VIM_ISDIGIT(*p))
+ && *p != AUTOLOAD_CHAR)
+ {
+ semsg(_(e_illvar), varname);
+ return FALSE;
+ }
+ return TRUE;
+}
+
+/*
+ * Return TRUE if typeval "tv" is set to be locked (immutable).
+ * Also give an error message, using "name" or _("name") when use_gettext is
+ * TRUE.
+ */
+ int
+tv_check_lock(int lock, char_u *name, int use_gettext)
+{
+ if (lock & VAR_LOCKED)
+ {
+ semsg(_("E741: Value is locked: %s"),
+ name == NULL ? (char_u *)_("Unknown")
+ : use_gettext ? (char_u *)_(name)
+ : name);
+ return TRUE;
+ }
+ if (lock & VAR_FIXED)
+ {
+ semsg(_("E742: Cannot change value of %s"),
+ name == NULL ? (char_u *)_("Unknown")
+ : use_gettext ? (char_u *)_(name)
+ : name);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/*
+ * Copy the values from typval_T "from" to typval_T "to".
+ * When needed allocates string or increases reference count.
+ * Does not make a copy of a list, blob or dict but copies the reference!
+ * It is OK for "from" and "to" to point to the same item. This is used to
+ * make a copy later.
+ */
+ void
+copy_tv(typval_T *from, typval_T *to)
+{
+ to->v_type = from->v_type;
+ to->v_lock = 0;
+ switch (from->v_type)
+ {
+ case VAR_NUMBER:
+ case VAR_SPECIAL:
+ to->vval.v_number = from->vval.v_number;
+ break;
+ case VAR_FLOAT:
+#ifdef FEAT_FLOAT
+ to->vval.v_float = from->vval.v_float;
+ break;
+#endif
+ case VAR_JOB:
+#ifdef FEAT_JOB_CHANNEL
+ to->vval.v_job = from->vval.v_job;
+ if (to->vval.v_job != NULL)
+ ++to->vval.v_job->jv_refcount;
+ break;
+#endif
+ case VAR_CHANNEL:
+#ifdef FEAT_JOB_CHANNEL
+ to->vval.v_channel = from->vval.v_channel;
+ if (to->vval.v_channel != NULL)
+ ++to->vval.v_channel->ch_refcount;
+ break;
+#endif
+ case VAR_STRING:
+ case VAR_FUNC:
+ if (from->vval.v_string == NULL)
+ to->vval.v_string = NULL;
+ else
+ {
+ to->vval.v_string = vim_strsave(from->vval.v_string);
+ if (from->v_type == VAR_FUNC)
+ func_ref(to->vval.v_string);
+ }
+ break;
+ case VAR_PARTIAL:
+ if (from->vval.v_partial == NULL)
+ to->vval.v_partial = NULL;
+ else
+ {
+ to->vval.v_partial = from->vval.v_partial;
+ ++to->vval.v_partial->pt_refcount;
+ }
+ break;
+ case VAR_BLOB:
+ if (from->vval.v_blob == NULL)
+ to->vval.v_blob = NULL;
+ else
+ {
+ to->vval.v_blob = from->vval.v_blob;
+ ++to->vval.v_blob->bv_refcount;
+ }
+ break;
+ case VAR_LIST:
+ if (from->vval.v_list == NULL)
+ to->vval.v_list = NULL;
+ else
+ {
+ to->vval.v_list = from->vval.v_list;
+ ++to->vval.v_list->lv_refcount;
+ }
+ break;
+ case VAR_DICT:
+ if (from->vval.v_dict == NULL)
+ to->vval.v_dict = NULL;
+ else
+ {
+ to->vval.v_dict = from->vval.v_dict;
+ ++to->vval.v_dict->dv_refcount;
+ }
+ break;
+ case VAR_UNKNOWN:
+ internal_error("copy_tv(UNKNOWN)");
+ break;
+ }
+}
+
+/*
+ * Make a copy of an item.
+ * Lists and Dictionaries are also copied. A deep copy if "deep" is set.
+ * For deepcopy() "copyID" is zero for a full copy or the ID for when a
+ * reference to an already copied list/dict can be used.
+ * Returns FAIL or OK.
+ */
+ int
+item_copy(
+ typval_T *from,
+ typval_T *to,
+ int deep,
+ int copyID)
+{
+ static int recurse = 0;
+ int ret = OK;
+
+ if (recurse >= DICT_MAXNEST)
+ {
+ emsg(_("E698: variable nested too deep for making a copy"));
+ return FAIL;
+ }
+ ++recurse;
+
+ switch (from->v_type)
+ {
+ case VAR_NUMBER:
+ case VAR_FLOAT:
+ case VAR_STRING:
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ case VAR_SPECIAL:
+ case VAR_JOB:
+ case VAR_CHANNEL:
+ copy_tv(from, to);
+ break;
+ case VAR_LIST:
+ to->v_type = VAR_LIST;
+ to->v_lock = 0;
+ if (from->vval.v_list == NULL)
+ to->vval.v_list = NULL;
+ else if (copyID != 0 && from->vval.v_list->lv_copyID == copyID)
+ {
+ /* use the copy made earlier */
+ to->vval.v_list = from->vval.v_list->lv_copylist;
+ ++to->vval.v_list->lv_refcount;
+ }
+ else
+ to->vval.v_list = list_copy(from->vval.v_list, deep, copyID);
+ if (to->vval.v_list == NULL)
+ ret = FAIL;
+ break;
+ case VAR_BLOB:
+ ret = blob_copy(from, to);
+ break;
+ case VAR_DICT:
+ to->v_type = VAR_DICT;
+ to->v_lock = 0;
+ if (from->vval.v_dict == NULL)
+ to->vval.v_dict = NULL;
+ else if (copyID != 0 && from->vval.v_dict->dv_copyID == copyID)
+ {
+ /* use the copy made earlier */
+ to->vval.v_dict = from->vval.v_dict->dv_copydict;
+ ++to->vval.v_dict->dv_refcount;
+ }
+ else
+ to->vval.v_dict = dict_copy(from->vval.v_dict, deep, copyID);
+ if (to->vval.v_dict == NULL)
+ ret = FAIL;
+ break;
+ case VAR_UNKNOWN:
+ internal_error("item_copy(UNKNOWN)");
+ ret = FAIL;
+ }
+ --recurse;
+ return ret;
+}
+
+/*
+ * This function is used by f_input() and f_inputdialog() functions. The third
+ * argument to f_input() specifies the type of completion to use at the
+ * prompt. The third argument to f_inputdialog() specifies the value to return
+ * when the user cancels the prompt.
+ */
+ void
+get_user_input(
+ typval_T *argvars,
+ typval_T *rettv,
+ int inputdialog,
+ int secret)
+{
+ char_u *prompt = tv_get_string_chk(&argvars[0]);
+ char_u *p = NULL;
+ int c;
+ char_u buf[NUMBUFLEN];
+ int cmd_silent_save = cmd_silent;
+ char_u *defstr = (char_u *)"";
+ int xp_type = EXPAND_NOTHING;
+ char_u *xp_arg = NULL;
+
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = NULL;
+
+#ifdef NO_CONSOLE_INPUT
+ /* While starting up, there is no place to enter text. When running tests
+ * with --not-a-term we assume feedkeys() will be used. */
+ if (no_console_input() && !is_not_a_term())
+ return;
+#endif
+
+ cmd_silent = FALSE; /* Want to see the prompt. */
+ if (prompt != NULL)
+ {
+ /* Only the part of the message after the last NL is considered as
+ * prompt for the command line */
+ p = vim_strrchr(prompt, '\n');
+ if (p == NULL)
+ p = prompt;
+ else
+ {
+ ++p;
+ c = *p;
+ *p = NUL;
+ msg_start();
+ msg_clr_eos();
+ msg_puts_attr((char *)prompt, echo_attr);
+ msg_didout = FALSE;
+ msg_starthere();
+ *p = c;
+ }
+ cmdline_row = msg_row;
+
+ if (argvars[1].v_type != VAR_UNKNOWN)
+ {
+ defstr = tv_get_string_buf_chk(&argvars[1], buf);
+ if (defstr != NULL)
+ stuffReadbuffSpec(defstr);
+
+ if (!inputdialog && argvars[2].v_type != VAR_UNKNOWN)
+ {
+ char_u *xp_name;
+ int xp_namelen;
+ long argt;
+
+ /* input() with a third argument: completion */
+ rettv->vval.v_string = NULL;
+
+ xp_name = tv_get_string_buf_chk(&argvars[2], buf);
+ if (xp_name == NULL)
+ return;
+
+ xp_namelen = (int)STRLEN(xp_name);
+
+ if (parse_compl_arg(xp_name, xp_namelen, &xp_type, &argt,
+ &xp_arg) == FAIL)
+ return;
+ }
+ }
+
+ if (defstr != NULL)
+ {
+ int save_ex_normal_busy = ex_normal_busy;
+
+ ex_normal_busy = 0;
+ rettv->vval.v_string =
+ getcmdline_prompt(secret ? NUL : '@', p, echo_attr,
+ xp_type, xp_arg);
+ ex_normal_busy = save_ex_normal_busy;
+ }
+ if (inputdialog && rettv->vval.v_string == NULL
+ && argvars[1].v_type != VAR_UNKNOWN
+ && argvars[2].v_type != VAR_UNKNOWN)
+ rettv->vval.v_string = vim_strsave(tv_get_string_buf(
+ &argvars[2], buf));
+
+ vim_free(xp_arg);
+
+ /* since the user typed this, no need to wait for return */
+ need_wait_return = FALSE;
+ msg_didout = FALSE;
+ }
+ cmd_silent = cmd_silent_save;
+}
+
+/*
+ * ":echo expr1 ..." print each argument separated with a space, add a
+ * newline at the end.
+ * ":echon expr1 ..." print each argument plain.
+ */
+ void
+ex_echo(exarg_T *eap)
+{
+ char_u *arg = eap->arg;
+ typval_T rettv;
+ char_u *tofree;
+ char_u *p;
+ int needclr = TRUE;
+ int atstart = TRUE;
+ char_u numbuf[NUMBUFLEN];
+ int did_emsg_before = did_emsg;
+ int called_emsg_before = called_emsg;
+
+ if (eap->skip)
+ ++emsg_skip;
+ while (*arg != NUL && *arg != '|' && *arg != '\n' && !got_int)
+ {
+ /* If eval1() causes an error message the text from the command may
+ * still need to be cleared. E.g., "echo 22,44". */
+ need_clr_eos = needclr;
+
+ p = arg;
+ if (eval1(&arg, &rettv, !eap->skip) == FAIL)
+ {
+ /*
+ * Report the invalid expression unless the expression evaluation
+ * has been cancelled due to an aborting error, an interrupt, or an
+ * exception.
+ */
+ if (!aborting() && did_emsg == did_emsg_before
+ && called_emsg == called_emsg_before)
+ semsg(_(e_invexpr2), p);
+ need_clr_eos = FALSE;
+ break;
+ }
+ need_clr_eos = FALSE;
+
+ if (!eap->skip)
+ {
+ if (atstart)
+ {
+ atstart = FALSE;
+ /* Call msg_start() after eval1(), evaluating the expression
+ * may cause a message to appear. */
+ if (eap->cmdidx == CMD_echo)
+ {
+ /* Mark the saved text as finishing the line, so that what
+ * follows is displayed on a new line when scrolling back
+ * at the more prompt. */
+ msg_sb_eol();
+ msg_start();
+ }
+ }
+ else if (eap->cmdidx == CMD_echo)
+ msg_puts_attr(" ", echo_attr);
+ p = echo_string(&rettv, &tofree, numbuf, get_copyID());
+ if (p != NULL)
+ for ( ; *p != NUL && !got_int; ++p)
+ {
+ if (*p == '\n' || *p == '\r' || *p == TAB)
+ {
+ if (*p != TAB && needclr)
+ {
+ /* remove any text still there from the command */
+ msg_clr_eos();
+ needclr = FALSE;
+ }
+ msg_putchar_attr(*p, echo_attr);
+ }
+ else
+ {
+ if (has_mbyte)
+ {
+ int i = (*mb_ptr2len)(p);
+
+ (void)msg_outtrans_len_attr(p, i, echo_attr);
+ p += i - 1;
+ }
+ else
+ (void)msg_outtrans_len_attr(p, 1, echo_attr);
+ }
+ }
+ vim_free(tofree);
+ }
+ clear_tv(&rettv);
+ arg = skipwhite(arg);
+ }
+ eap->nextcmd = check_nextcmd(arg);
+
+ if (eap->skip)
+ --emsg_skip;
+ else
+ {
+ /* remove text that may still be there from the command */
+ if (needclr)
+ msg_clr_eos();
+ if (eap->cmdidx == CMD_echo)
+ msg_end();
+ }
+}
+
+/*
+ * ":echohl {name}".
+ */
+ void
+ex_echohl(exarg_T *eap)
+{
+ echo_attr = syn_name2attr(eap->arg);
+}
+
+/*
+ * ":execute expr1 ..." execute the result of an expression.
+ * ":echomsg expr1 ..." Print a message
+ * ":echoerr expr1 ..." Print an error
+ * Each gets spaces around each argument and a newline at the end for
+ * echo commands
+ */
+ void
+ex_execute(exarg_T *eap)
+{
+ char_u *arg = eap->arg;
+ typval_T rettv;
+ int ret = OK;
+ char_u *p;
+ garray_T ga;
+ int len;
+ int save_did_emsg = did_emsg;
+
+ ga_init2(&ga, 1, 80);
+
+ if (eap->skip)
+ ++emsg_skip;
+ while (*arg != NUL && *arg != '|' && *arg != '\n')
+ {
+ p = arg;
+ ret = eval1_emsg(&arg, &rettv, !eap->skip);
+ if (ret == FAIL)
+ break;
+
+ if (!eap->skip)
+ {
+ char_u buf[NUMBUFLEN];
+
+ if (eap->cmdidx == CMD_execute)
+ p = tv_get_string_buf(&rettv, buf);
+ else
+ p = tv_stringify(&rettv, buf);
+ len = (int)STRLEN(p);
+ if (ga_grow(&ga, len + 2) == FAIL)
+ {
+ clear_tv(&rettv);
+ ret = FAIL;
+ break;
+ }
+ if (ga.ga_len)
+ ((char_u *)(ga.ga_data))[ga.ga_len++] = ' ';
+ STRCPY((char_u *)(ga.ga_data) + ga.ga_len, p);
+ ga.ga_len += len;
+ }
+
+ clear_tv(&rettv);
+ arg = skipwhite(arg);
+ }
+
+ if (ret != FAIL && ga.ga_data != NULL)
+ {
+ if (eap->cmdidx == CMD_echomsg || eap->cmdidx == CMD_echoerr)
+ {
+ /* Mark the already saved text as finishing the line, so that what
+ * follows is displayed on a new line when scrolling back at the
+ * more prompt. */
+ msg_sb_eol();
+ }
+
+ if (eap->cmdidx == CMD_echomsg)
+ {
+ msg_attr(ga.ga_data, echo_attr);
+ out_flush();
+ }
+ else if (eap->cmdidx == CMD_echoerr)
+ {
+ /* We don't want to abort following commands, restore did_emsg. */
+ save_did_emsg = did_emsg;
+ emsg(ga.ga_data);
+ if (!force_abort)
+ did_emsg = save_did_emsg;
+ }
+ else if (eap->cmdidx == CMD_execute)
+ do_cmdline((char_u *)ga.ga_data,
+ eap->getline, eap->cookie, DOCMD_NOWAIT|DOCMD_VERBOSE);
+ }
+
+ ga_clear(&ga);
+
+ if (eap->skip)
+ --emsg_skip;
+
+ eap->nextcmd = check_nextcmd(arg);
+}
+
+/*
+ * Find window specified by "vp" in tabpage "tp".
+ */
+ win_T *
+find_win_by_nr(
+ typval_T *vp,
+ tabpage_T *tp) /* NULL for current tab page */
+{
+ win_T *wp;
+ int nr = (int)tv_get_number_chk(vp, NULL);
+
+ if (nr < 0)
+ return NULL;
+ if (nr == 0)
+ return curwin;
+
+ FOR_ALL_WINDOWS_IN_TAB(tp, wp)
+ {
+ if (nr >= LOWEST_WIN_ID)
+ {
+ if (wp->w_id == nr)
+ return wp;
+ }
+ else if (--nr <= 0)
+ break;
+ }
+ if (nr >= LOWEST_WIN_ID)
+ return NULL;
+ return wp;
+}
+
+/*
+ * Find a window: When using a Window ID in any tab page, when using a number
+ * in the current tab page.
+ */
+ win_T *
+find_win_by_nr_or_id(typval_T *vp)
+{
+ int nr = (int)tv_get_number_chk(vp, NULL);
+
+ if (nr >= LOWEST_WIN_ID)
+ return win_id2wp(vp);
+ return find_win_by_nr(vp, NULL);
+}
+
+/*
+ * Find window specified by "wvp" in tabpage "tvp".
+ */
+ win_T *
+find_tabwin(
+ typval_T *wvp, /* VAR_UNKNOWN for current window */
+ typval_T *tvp) /* VAR_UNKNOWN for current tab page */
+{
+ win_T *wp = NULL;
+ tabpage_T *tp = NULL;
+ long n;
+
+ if (wvp->v_type != VAR_UNKNOWN)
+ {
+ if (tvp->v_type != VAR_UNKNOWN)
+ {
+ n = (long)tv_get_number(tvp);
+ if (n >= 0)
+ tp = find_tabpage(n);
+ }
+ else
+ tp = curtab;
+
+ if (tp != NULL)
+ wp = find_win_by_nr(wvp, tp);
+ }
+ else
+ wp = curwin;
+
+ return wp;
+}
+
+/*
+ * getwinvar() and gettabwinvar()
+ */
+ void
+getwinvar(
+ typval_T *argvars,
+ typval_T *rettv,
+ int off) /* 1 for gettabwinvar() */
+{
+ win_T *win;
+ char_u *varname;
+ dictitem_T *v;
+ tabpage_T *tp = NULL;
+ int done = FALSE;
+ win_T *oldcurwin;
+ tabpage_T *oldtabpage;
+ int need_switch_win;
+
+ if (off == 1)
+ tp = find_tabpage((int)tv_get_number_chk(&argvars[0], NULL));
+ else
+ tp = curtab;
+ win = find_win_by_nr(&argvars[off], tp);
+ varname = tv_get_string_chk(&argvars[off + 1]);
+ ++emsg_off;
+
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = NULL;
+
+ if (win != NULL && varname != NULL)
+ {
+ /* Set curwin to be our win, temporarily. Also set the tabpage,
+ * otherwise the window is not valid. Only do this when needed,
+ * autocommands get blocked. */
+ need_switch_win = !(tp == curtab && win == curwin);
+ if (!need_switch_win
+ || switch_win(&oldcurwin, &oldtabpage, win, tp, TRUE) == OK)
+ {
+ if (*varname == '&')
+ {
+ if (varname[1] == NUL)
+ {
+ /* get all window-local options in a dict */
+ dict_T *opts = get_winbuf_options(FALSE);
+
+ if (opts != NULL)
+ {
+ rettv_dict_set(rettv, opts);
+ done = TRUE;
+ }
+ }
+ else if (get_option_tv(&varname, rettv, 1) == OK)
+ /* window-local-option */
+ done = TRUE;
+ }
+ else
+ {
+ /* Look up the variable. */
+ /* Let getwinvar({nr}, "") return the "w:" dictionary. */
+ v = find_var_in_ht(&win->w_vars->dv_hashtab, 'w',
+ varname, FALSE);
+ if (v != NULL)
+ {
+ copy_tv(&v->di_tv, rettv);
+ done = TRUE;
+ }
+ }
+ }
+
+ if (need_switch_win)
+ /* restore previous notion of curwin */
+ restore_win(oldcurwin, oldtabpage, TRUE);
+ }
+
+ if (!done && argvars[off + 2].v_type != VAR_UNKNOWN)
+ /* use the default return value */
+ copy_tv(&argvars[off + 2], rettv);
+
+ --emsg_off;
+}
+
+/*
+ * "setwinvar()" and "settabwinvar()" functions
+ */
+ void
+setwinvar(typval_T *argvars, typval_T *rettv UNUSED, int off)
+{
+ win_T *win;
+ win_T *save_curwin;
+ tabpage_T *save_curtab;
+ int need_switch_win;
+ char_u *varname, *winvarname;
+ typval_T *varp;
+ char_u nbuf[NUMBUFLEN];
+ tabpage_T *tp = NULL;
+
+ if (check_restricted() || check_secure())
+ return;
+
+ if (off == 1)
+ tp = find_tabpage((int)tv_get_number_chk(&argvars[0], NULL));
+ else
+ tp = curtab;
+ win = find_win_by_nr(&argvars[off], tp);
+ varname = tv_get_string_chk(&argvars[off + 1]);
+ varp = &argvars[off + 2];
+
+ if (win != NULL && varname != NULL && varp != NULL)
+ {
+ need_switch_win = !(tp == curtab && win == curwin);
+ if (!need_switch_win
+ || switch_win(&save_curwin, &save_curtab, win, tp, TRUE) == OK)
+ {
+ if (*varname == '&')
+ {
+ long numval;
+ char_u *strval;
+ int error = FALSE;
+
+ ++varname;
+ numval = (long)tv_get_number_chk(varp, &error);
+ strval = tv_get_string_buf_chk(varp, nbuf);
+ if (!error && strval != NULL)
+ set_option_value(varname, numval, strval, OPT_LOCAL);
+ }
+ else
+ {
+ winvarname = alloc((unsigned)STRLEN(varname) + 3);
+ if (winvarname != NULL)
+ {
+ STRCPY(winvarname, "w:");
+ STRCPY(winvarname + 2, varname);
+ set_var(winvarname, varp, TRUE);
+ vim_free(winvarname);
+ }
+ }
+ }
+ if (need_switch_win)
+ restore_win(save_curwin, save_curtab, TRUE);
+ }
+}
+
+/*
+ * Skip over the name of an option: "&option", "&g:option" or "&l:option".
+ * "arg" points to the "&" or '+' when called, to "option" when returning.
+ * Returns NULL when no option name found. Otherwise pointer to the char
+ * after the option name.
+ */
+ static char_u *
+find_option_end(char_u **arg, int *opt_flags)
+{
+ char_u *p = *arg;
+
+ ++p;
+ if (*p == 'g' && p[1] == ':')
+ {
+ *opt_flags = OPT_GLOBAL;
+ p += 2;
+ }
+ else if (*p == 'l' && p[1] == ':')
+ {
+ *opt_flags = OPT_LOCAL;
+ p += 2;
+ }
+ else
+ *opt_flags = 0;
+
+ if (!ASCII_ISALPHA(*p))
+ return NULL;
+ *arg = p;
+
+ if (p[0] == 't' && p[1] == '_' && p[2] != NUL && p[3] != NUL)
+ p += 4; /* termcap option */
+ else
+ while (ASCII_ISALPHA(*p))
+ ++p;
+ return p;
+}
+
+/*
+ * Return the autoload script name for a function or variable name.
+ * Returns NULL when out of memory.
+ */
+ char_u *
+autoload_name(char_u *name)
+{
+ char_u *p;
+ char_u *scriptname;
+
+ /* Get the script file name: replace '#' with '/', append ".vim". */
+ scriptname = alloc((unsigned)(STRLEN(name) + 14));
+ if (scriptname == NULL)
+ return FALSE;
+ STRCPY(scriptname, "autoload/");
+ STRCAT(scriptname, name);
+ *vim_strrchr(scriptname, AUTOLOAD_CHAR) = NUL;
+ STRCAT(scriptname, ".vim");
+ while ((p = vim_strchr(scriptname, AUTOLOAD_CHAR)) != NULL)
+ *p = '/';
+ return scriptname;
+}
+
+/*
+ * If "name" has a package name try autoloading the script for it.
+ * Return TRUE if a package was loaded.
+ */
+ int
+script_autoload(
+ char_u *name,
+ int reload) /* load script again when already loaded */
+{
+ char_u *p;
+ char_u *scriptname, *tofree;
+ int ret = FALSE;
+ int i;
+
+ /* If there is no '#' after name[0] there is no package name. */
+ p = vim_strchr(name, AUTOLOAD_CHAR);
+ if (p == NULL || p == name)
+ return FALSE;
+
+ tofree = scriptname = autoload_name(name);
+
+ /* Find the name in the list of previously loaded package names. Skip
+ * "autoload/", it's always the same. */
+ for (i = 0; i < ga_loaded.ga_len; ++i)
+ if (STRCMP(((char_u **)ga_loaded.ga_data)[i] + 9, scriptname + 9) == 0)
+ break;
+ if (!reload && i < ga_loaded.ga_len)
+ ret = FALSE; /* was loaded already */
+ else
+ {
+ /* Remember the name if it wasn't loaded already. */
+ if (i == ga_loaded.ga_len && ga_grow(&ga_loaded, 1) == OK)
+ {
+ ((char_u **)ga_loaded.ga_data)[ga_loaded.ga_len++] = scriptname;
+ tofree = NULL;
+ }
+
+ /* Try loading the package from $VIMRUNTIME/autoload/<name>.vim */
+ if (source_runtime(scriptname, 0) == OK)
+ ret = TRUE;
+ }
+
+ vim_free(tofree);
+ return ret;
+}
+
+#if defined(FEAT_VIMINFO) || defined(FEAT_SESSION)
+typedef enum
+{
+ VAR_FLAVOUR_DEFAULT, /* doesn't start with uppercase */
+ VAR_FLAVOUR_SESSION, /* starts with uppercase, some lower */
+ VAR_FLAVOUR_VIMINFO /* all uppercase */
+} var_flavour_T;
+
+ static var_flavour_T
+var_flavour(char_u *varname)
+{
+ char_u *p = varname;
+
+ if (ASCII_ISUPPER(*p))
+ {
+ while (*(++p))
+ if (ASCII_ISLOWER(*p))
+ return VAR_FLAVOUR_SESSION;
+ return VAR_FLAVOUR_VIMINFO;
+ }
+ else
+ return VAR_FLAVOUR_DEFAULT;
+}
+#endif
+
+#if defined(FEAT_VIMINFO) || defined(PROTO)
+/*
+ * Restore global vars that start with a capital from the viminfo file
+ */
+ int
+read_viminfo_varlist(vir_T *virp, int writing)
+{
+ char_u *tab;
+ int type = VAR_NUMBER;
+ typval_T tv;
+ funccal_entry_T funccal_entry;
+
+ if (!writing && (find_viminfo_parameter('!') != NULL))
+ {
+ tab = vim_strchr(virp->vir_line + 1, '\t');
+ if (tab != NULL)
+ {
+ *tab++ = '\0'; /* isolate the variable name */
+ switch (*tab)
+ {
+ case 'S': type = VAR_STRING; break;
+#ifdef FEAT_FLOAT
+ case 'F': type = VAR_FLOAT; break;
+#endif
+ case 'D': type = VAR_DICT; break;
+ case 'L': type = VAR_LIST; break;
+ case 'B': type = VAR_BLOB; break;
+ case 'X': type = VAR_SPECIAL; break;
+ }
+
+ tab = vim_strchr(tab, '\t');
+ if (tab != NULL)
+ {
+ tv.v_type = type;
+ if (type == VAR_STRING || type == VAR_DICT
+ || type == VAR_LIST || type == VAR_BLOB)
+ tv.vval.v_string = viminfo_readstring(virp,
+ (int)(tab - virp->vir_line + 1), TRUE);
+#ifdef FEAT_FLOAT
+ else if (type == VAR_FLOAT)
+ (void)string2float(tab + 1, &tv.vval.v_float);
+#endif
+ else
+ tv.vval.v_number = atol((char *)tab + 1);
+ if (type == VAR_DICT || type == VAR_LIST)
+ {
+ typval_T *etv = eval_expr(tv.vval.v_string, NULL);
+
+ if (etv == NULL)
+ /* Failed to parse back the dict or list, use it as a
+ * string. */
+ tv.v_type = VAR_STRING;
+ else
+ {
+ vim_free(tv.vval.v_string);
+ tv = *etv;
+ vim_free(etv);
+ }
+ }
+ else if (type == VAR_BLOB)
+ {
+ blob_T *blob = string2blob(tv.vval.v_string);
+
+ if (blob == NULL)
+ // Failed to parse back the blob, use it as a string.
+ tv.v_type = VAR_STRING;
+ else
+ {
+ vim_free(tv.vval.v_string);
+ tv.v_type = VAR_BLOB;
+ tv.vval.v_blob = blob;
+ }
+ }
+
+ /* when in a function use global variables */
+ save_funccal(&funccal_entry);
+ set_var(virp->vir_line + 1, &tv, FALSE);
+ restore_funccal();
+
+ if (tv.v_type == VAR_STRING)
+ vim_free(tv.vval.v_string);
+ else if (tv.v_type == VAR_DICT || tv.v_type == VAR_LIST ||
+ tv.v_type == VAR_BLOB)
+ clear_tv(&tv);
+ }
+ }
+ }
+
+ return viminfo_readline(virp);
+}
+
+/*
+ * Write global vars that start with a capital to the viminfo file
+ */
+ void
+write_viminfo_varlist(FILE *fp)
+{
+ hashitem_T *hi;
+ dictitem_T *this_var;
+ int todo;
+ char *s = "";
+ char_u *p;
+ char_u *tofree;
+ char_u numbuf[NUMBUFLEN];
+
+ if (find_viminfo_parameter('!') == NULL)
+ return;
+
+ fputs(_("\n# global variables:\n"), fp);
+
+ todo = (int)globvarht.ht_used;
+ for (hi = globvarht.ht_array; todo > 0; ++hi)
+ {
+ if (!HASHITEM_EMPTY(hi))
+ {
+ --todo;
+ this_var = HI2DI(hi);
+ if (var_flavour(this_var->di_key) == VAR_FLAVOUR_VIMINFO)
+ {
+ switch (this_var->di_tv.v_type)
+ {
+ case VAR_STRING: s = "STR"; break;
+ case VAR_NUMBER: s = "NUM"; break;
+ case VAR_FLOAT: s = "FLO"; break;
+ case VAR_DICT: s = "DIC"; break;
+ case VAR_LIST: s = "LIS"; break;
+ case VAR_BLOB: s = "BLO"; break;
+ case VAR_SPECIAL: s = "XPL"; break;
+
+ case VAR_UNKNOWN:
+ case VAR_FUNC:
+ case VAR_PARTIAL:
+ case VAR_JOB:
+ case VAR_CHANNEL:
+ continue;
+ }
+ fprintf(fp, "!%s\t%s\t", this_var->di_key, s);
+ if (this_var->di_tv.v_type == VAR_SPECIAL)
+ {
+ sprintf((char *)numbuf, "%ld",
+ (long)this_var->di_tv.vval.v_number);
+ p = numbuf;
+ tofree = NULL;
+ }
+ else
+ p = echo_string(&this_var->di_tv, &tofree, numbuf, 0);
+ if (p != NULL)
+ viminfo_writestring(fp, p);
+ vim_free(tofree);
+ }
+ }
+ }
+}
+#endif
+
+#if defined(FEAT_SESSION) || defined(PROTO)
+ int
+store_session_globals(FILE *fd)
+{
+ hashitem_T *hi;
+ dictitem_T *this_var;
+ int todo;
+ char_u *p, *t;
+
+ todo = (int)globvarht.ht_used;
+ for (hi = globvarht.ht_array; todo > 0; ++hi)
+ {
+ if (!HASHITEM_EMPTY(hi))
+ {
+ --todo;
+ this_var = HI2DI(hi);
+ if ((this_var->di_tv.v_type == VAR_NUMBER
+ || this_var->di_tv.v_type == VAR_STRING)
+ && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
+ {
+ /* Escape special characters with a backslash. Turn a LF and
+ * CR into \n and \r. */
+ p = vim_strsave_escaped(tv_get_string(&this_var->di_tv),
+ (char_u *)"\\\"\n\r");
+ if (p == NULL) /* out of memory */
+ break;
+ for (t = p; *t != NUL; ++t)
+ if (*t == '\n')
+ *t = 'n';
+ else if (*t == '\r')
+ *t = 'r';
+ if ((fprintf(fd, "let %s = %c%s%c",
+ this_var->di_key,
+ (this_var->di_tv.v_type == VAR_STRING) ? '"'
+ : ' ',
+ p,
+ (this_var->di_tv.v_type == VAR_STRING) ? '"'
+ : ' ') < 0)
+ || put_eol(fd) == FAIL)
+ {
+ vim_free(p);
+ return FAIL;
+ }
+ vim_free(p);
+ }
+#ifdef FEAT_FLOAT
+ else if (this_var->di_tv.v_type == VAR_FLOAT
+ && var_flavour(this_var->di_key) == VAR_FLAVOUR_SESSION)
+ {
+ float_T f = this_var->di_tv.vval.v_float;
+ int sign = ' ';
+
+ if (f < 0)
+ {
+ f = -f;
+ sign = '-';
+ }
+ if ((fprintf(fd, "let %s = %c%f",
+ this_var->di_key, sign, f) < 0)
+ || put_eol(fd) == FAIL)
+ return FAIL;
+ }
+#endif
+ }
+ }
+ return OK;
+}
+#endif
+
+/*
+ * Display script name where an item was last set.
+ * Should only be invoked when 'verbose' is non-zero.
+ */
+ void
+last_set_msg(sctx_T script_ctx)
+{
+ char_u *p;
+
+ if (script_ctx.sc_sid != 0)
+ {
+ p = home_replace_save(NULL, get_scriptname(script_ctx.sc_sid));
+ if (p != NULL)
+ {
+ verbose_enter();
+ msg_puts(_("\n\tLast set from "));
+ msg_puts((char *)p);
+ if (script_ctx.sc_lnum > 0)
+ {
+ msg_puts(_(" line "));
+ msg_outnum((long)script_ctx.sc_lnum);
+ }
+ verbose_leave();
+ vim_free(p);
+ }
+ }
+}
+
+/* reset v:option_new, v:option_old and v:option_type */
+ void
+reset_v_option_vars(void)
+{
+ set_vim_var_string(VV_OPTION_NEW, NULL, -1);
+ set_vim_var_string(VV_OPTION_OLD, NULL, -1);
+ set_vim_var_string(VV_OPTION_TYPE, NULL, -1);
+}
+
+/*
+ * Prepare "gap" for an assert error and add the sourcing position.
+ */
+ void
+prepare_assert_error(garray_T *gap)
+{
+ char buf[NUMBUFLEN];
+
+ ga_init2(gap, 1, 100);
+ if (sourcing_name != NULL)
+ {
+ ga_concat(gap, sourcing_name);
+ if (sourcing_lnum > 0)
+ ga_concat(gap, (char_u *)" ");
+ }
+ if (sourcing_lnum > 0)
+ {
+ sprintf(buf, "line %ld", (long)sourcing_lnum);
+ ga_concat(gap, (char_u *)buf);
+ }
+ if (sourcing_name != NULL || sourcing_lnum > 0)
+ ga_concat(gap, (char_u *)": ");
+}
+
+/*
+ * Add an assert error to v:errors.
+ */
+ void
+assert_error(garray_T *gap)
+{
+ struct vimvar *vp = &vimvars[VV_ERRORS];
+
+ if (vp->vv_type != VAR_LIST || vimvars[VV_ERRORS].vv_list == NULL)
+ /* Make sure v:errors is a list. */
+ set_vim_var_list(VV_ERRORS, list_alloc());
+ list_append_string(vimvars[VV_ERRORS].vv_list, gap->ga_data, gap->ga_len);
+}
+
+ int
+assert_equal_common(typval_T *argvars, assert_type_T atype)
+{
+ garray_T ga;
+
+ if (tv_equal(&argvars[0], &argvars[1], FALSE, FALSE)
+ != (atype == ASSERT_EQUAL))
+ {
+ prepare_assert_error(&ga);
+ fill_assert_error(&ga, &argvars[2], NULL, &argvars[0], &argvars[1],
+ atype);
+ assert_error(&ga);
+ ga_clear(&ga);
+ return 1;
+ }
+ return 0;
+}
+
+ int
+assert_equalfile(typval_T *argvars)
+{
+ char_u buf1[NUMBUFLEN];
+ char_u buf2[NUMBUFLEN];
+ char_u *fname1 = tv_get_string_buf_chk(&argvars[0], buf1);
+ char_u *fname2 = tv_get_string_buf_chk(&argvars[1], buf2);
+ garray_T ga;
+ FILE *fd1;
+ FILE *fd2;
+
+ if (fname1 == NULL || fname2 == NULL)
+ return 0;
+
+ IObuff[0] = NUL;
+ fd1 = mch_fopen((char *)fname1, READBIN);
+ if (fd1 == NULL)
+ {
+ vim_snprintf((char *)IObuff, IOSIZE, (char *)e_notread, fname1);
+ }
+ else
+ {
+ fd2 = mch_fopen((char *)fname2, READBIN);
+ if (fd2 == NULL)
+ {
+ fclose(fd1);
+ vim_snprintf((char *)IObuff, IOSIZE, (char *)e_notread, fname2);
+ }
+ else
+ {
+ int c1, c2;
+ long count = 0;
+
+ for (;;)
+ {
+ c1 = fgetc(fd1);
+ c2 = fgetc(fd2);
+ if (c1 == EOF)
+ {
+ if (c2 != EOF)
+ STRCPY(IObuff, "first file is shorter");
+ break;
+ }
+ else if (c2 == EOF)
+ {
+ STRCPY(IObuff, "second file is shorter");
+ break;
+ }
+ else if (c1 != c2)
+ {
+ vim_snprintf((char *)IObuff, IOSIZE,
+ "difference at byte %ld", count);
+ break;
+ }
+ ++count;
+ }
+ fclose(fd1);
+ fclose(fd2);
+ }
+ }
+ if (IObuff[0] != NUL)
+ {
+ prepare_assert_error(&ga);
+ ga_concat(&ga, IObuff);
+ assert_error(&ga);
+ ga_clear(&ga);
+ return 1;
+ }
+ return 0;
+}
+
+ int
+assert_match_common(typval_T *argvars, assert_type_T atype)
+{
+ garray_T ga;
+ char_u buf1[NUMBUFLEN];
+ char_u buf2[NUMBUFLEN];
+ char_u *pat = tv_get_string_buf_chk(&argvars[0], buf1);
+ char_u *text = tv_get_string_buf_chk(&argvars[1], buf2);
+
+ if (pat == NULL || text == NULL)
+ emsg(_(e_invarg));
+ else if (pattern_match(pat, text, FALSE) != (atype == ASSERT_MATCH))
+ {
+ prepare_assert_error(&ga);
+ fill_assert_error(&ga, &argvars[2], NULL, &argvars[0], &argvars[1],
+ atype);
+ assert_error(&ga);
+ ga_clear(&ga);
+ return 1;
+ }
+ return 0;
+}
+
+ int
+assert_inrange(typval_T *argvars)
+{
+ garray_T ga;
+ int error = FALSE;
+ varnumber_T lower = tv_get_number_chk(&argvars[0], &error);
+ varnumber_T upper = tv_get_number_chk(&argvars[1], &error);
+ varnumber_T actual = tv_get_number_chk(&argvars[2], &error);
+ char_u *tofree;
+ char msg[200];
+ char_u numbuf[NUMBUFLEN];
+
+ if (error)
+ return 0;
+ if (actual < lower || actual > upper)
+ {
+ prepare_assert_error(&ga);
+ if (argvars[3].v_type != VAR_UNKNOWN)
+ {
+ ga_concat(&ga, tv2string(&argvars[3], &tofree, numbuf, 0));
+ vim_free(tofree);
+ }
+ else
+ {
+ vim_snprintf(msg, 200, "Expected range %ld - %ld, but got %ld",
+ (long)lower, (long)upper, (long)actual);
+ ga_concat(&ga, (char_u *)msg);
+ }
+ assert_error(&ga);
+ ga_clear(&ga);
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Common for assert_true() and assert_false().
+ * Return non-zero for failure.
+ */
+ int
+assert_bool(typval_T *argvars, int isTrue)
+{
+ int error = FALSE;
+ garray_T ga;
+
+ if (argvars[0].v_type == VAR_SPECIAL
+ && argvars[0].vval.v_number == (isTrue ? VVAL_TRUE : VVAL_FALSE))
+ return 0;
+ if (argvars[0].v_type != VAR_NUMBER
+ || (tv_get_number_chk(&argvars[0], &error) == 0) == isTrue
+ || error)
+ {
+ prepare_assert_error(&ga);
+ fill_assert_error(&ga, &argvars[1],
+ (char_u *)(isTrue ? "True" : "False"),
+ NULL, &argvars[0], ASSERT_OTHER);
+ assert_error(&ga);
+ ga_clear(&ga);
+ return 1;
+ }
+ return 0;
+}
+
+ int
+assert_report(typval_T *argvars)
+{
+ garray_T ga;
+
+ prepare_assert_error(&ga);
+ ga_concat(&ga, tv_get_string(&argvars[0]));
+ assert_error(&ga);
+ ga_clear(&ga);
+ return 1;
+}
+
+ int
+assert_exception(typval_T *argvars)
+{
+ garray_T ga;
+ char_u *error = tv_get_string_chk(&argvars[0]);
+
+ if (vimvars[VV_EXCEPTION].vv_str == NULL)
+ {
+ prepare_assert_error(&ga);
+ ga_concat(&ga, (char_u *)"v:exception is not set");
+ assert_error(&ga);
+ ga_clear(&ga);
+ return 1;
+ }
+ else if (error != NULL
+ && strstr((char *)vimvars[VV_EXCEPTION].vv_str, (char *)error) == NULL)
+ {
+ prepare_assert_error(&ga);
+ fill_assert_error(&ga, &argvars[1], NULL, &argvars[0],
+ &vimvars[VV_EXCEPTION].vv_tv, ASSERT_OTHER);
+ assert_error(&ga);
+ ga_clear(&ga);
+ return 1;
+ }
+ return 0;
+}
+
+ int
+assert_beeps(typval_T *argvars)
+{
+ char_u *cmd = tv_get_string_chk(&argvars[0]);
+ garray_T ga;
+ int ret = 0;
+
+ called_vim_beep = FALSE;
+ suppress_errthrow = TRUE;
+ emsg_silent = FALSE;
+ do_cmdline_cmd(cmd);
+ if (!called_vim_beep)
+ {
+ prepare_assert_error(&ga);
+ ga_concat(&ga, (char_u *)"command did not beep: ");
+ ga_concat(&ga, cmd);
+ assert_error(&ga);
+ ga_clear(&ga);
+ ret = 1;
+ }
+
+ suppress_errthrow = FALSE;
+ emsg_on_display = FALSE;
+ return ret;
+}
+
+ int
+assert_fails(typval_T *argvars)
+{
+ char_u *cmd = tv_get_string_chk(&argvars[0]);
+ garray_T ga;
+ int ret = 0;
+ char_u numbuf[NUMBUFLEN];
+ char_u *tofree;
+
+ called_emsg = FALSE;
+ suppress_errthrow = TRUE;
+ emsg_silent = TRUE;
+ do_cmdline_cmd(cmd);
+ if (!called_emsg)
+ {
+ prepare_assert_error(&ga);
+ ga_concat(&ga, (char_u *)"command did not fail: ");
+ if (argvars[1].v_type != VAR_UNKNOWN
+ && argvars[2].v_type != VAR_UNKNOWN)
+ {
+ ga_concat(&ga, echo_string(&argvars[2], &tofree, numbuf, 0));
+ vim_free(tofree);
+ }
+ else
+ ga_concat(&ga, cmd);
+ assert_error(&ga);
+ ga_clear(&ga);
+ ret = 1;
+ }
+ else if (argvars[1].v_type != VAR_UNKNOWN)
+ {
+ char_u buf[NUMBUFLEN];
+ char *error = (char *)tv_get_string_buf_chk(&argvars[1], buf);
+
+ if (error == NULL
+ || strstr((char *)vimvars[VV_ERRMSG].vv_str, error) == NULL)
+ {
+ prepare_assert_error(&ga);
+ fill_assert_error(&ga, &argvars[2], NULL, &argvars[1],
+ &vimvars[VV_ERRMSG].vv_tv, ASSERT_OTHER);
+ assert_error(&ga);
+ ga_clear(&ga);
+ ret = 1;
+ }
+ }
+
+ called_emsg = FALSE;
+ suppress_errthrow = FALSE;
+ emsg_silent = FALSE;
+ emsg_on_display = FALSE;
+ set_vim_var_string(VV_ERRMSG, NULL, 0);
+ return ret;
+}
+
+/*
+ * Append "p[clen]" to "gap", escaping unprintable characters.
+ * Changes NL to \n, CR to \r, etc.
+ */
+ static void
+ga_concat_esc(garray_T *gap, char_u *p, int clen)
+{
+ char_u buf[NUMBUFLEN];
+
+ if (clen > 1)
+ {
+ mch_memmove(buf, p, clen);
+ buf[clen] = NUL;
+ ga_concat(gap, buf);
+ }
+ else switch (*p)
+ {
+ case BS: ga_concat(gap, (char_u *)"\\b"); break;
+ case ESC: ga_concat(gap, (char_u *)"\\e"); break;
+ case FF: ga_concat(gap, (char_u *)"\\f"); break;
+ case NL: ga_concat(gap, (char_u *)"\\n"); break;
+ case TAB: ga_concat(gap, (char_u *)"\\t"); break;
+ case CAR: ga_concat(gap, (char_u *)"\\r"); break;
+ case '\\': ga_concat(gap, (char_u *)"\\\\"); break;
+ default:
+ if (*p < ' ')
+ {
+ vim_snprintf((char *)buf, NUMBUFLEN, "\\x%02x", *p);
+ ga_concat(gap, buf);
+ }
+ else
+ ga_append(gap, *p);
+ break;
+ }
+}
+
+/*
+ * Append "str" to "gap", escaping unprintable characters.
+ * Changes NL to \n, CR to \r, etc.
+ */
+ static void
+ga_concat_shorten_esc(garray_T *gap, char_u *str)
+{
+ char_u *p;
+ char_u *s;
+ int c;
+ int clen;
+ char_u buf[NUMBUFLEN];
+ int same_len;
+
+ if (str == NULL)
+ {
+ ga_concat(gap, (char_u *)"NULL");
+ return;
+ }
+
+ for (p = str; *p != NUL; ++p)
+ {
+ same_len = 1;
+ s = p;
+ c = mb_ptr2char_adv(&s);
+ clen = s - p;
+ while (*s != NUL && c == mb_ptr2char(s))
+ {
+ ++same_len;
+ s += clen;
+ }
+ if (same_len > 20)
+ {
+ ga_concat(gap, (char_u *)"\\[");
+ ga_concat_esc(gap, p, clen);
+ ga_concat(gap, (char_u *)" occurs ");
+ vim_snprintf((char *)buf, NUMBUFLEN, "%d", same_len);
+ ga_concat(gap, buf);
+ ga_concat(gap, (char_u *)" times]");
+ p = s - 1;
+ }
+ else
+ ga_concat_esc(gap, p, clen);
+ }
+}
+
+/*
+ * Fill "gap" with information about an assert error.
+ */
+ void
+fill_assert_error(
+ garray_T *gap,
+ typval_T *opt_msg_tv,
+ char_u *exp_str,
+ typval_T *exp_tv,
+ typval_T *got_tv,
+ assert_type_T atype)
+{
+ char_u numbuf[NUMBUFLEN];
+ char_u *tofree;
+
+ if (opt_msg_tv->v_type != VAR_UNKNOWN)
+ {
+ ga_concat(gap, echo_string(opt_msg_tv, &tofree, numbuf, 0));
+ vim_free(tofree);
+ ga_concat(gap, (char_u *)": ");
+ }
+
+ if (atype == ASSERT_MATCH || atype == ASSERT_NOTMATCH)
+ ga_concat(gap, (char_u *)"Pattern ");
+ else if (atype == ASSERT_NOTEQUAL)
+ ga_concat(gap, (char_u *)"Expected not equal to ");
+ else
+ ga_concat(gap, (char_u *)"Expected ");
+ if (exp_str == NULL)
+ {
+ ga_concat_shorten_esc(gap, tv2string(exp_tv, &tofree, numbuf, 0));
+ vim_free(tofree);
+ }
+ else
+ ga_concat_shorten_esc(gap, exp_str);
+ if (atype != ASSERT_NOTEQUAL)
+ {
+ if (atype == ASSERT_MATCH)
+ ga_concat(gap, (char_u *)" does not match ");
+ else if (atype == ASSERT_NOTMATCH)
+ ga_concat(gap, (char_u *)" does match ");
+ else
+ ga_concat(gap, (char_u *)" but got ");
+ ga_concat_shorten_esc(gap, tv2string(got_tv, &tofree, numbuf, 0));
+ vim_free(tofree);
+ }
+}
+
+/*
+ * Compare "typ1" and "typ2". Put the result in "typ1".
+ */
+ int
+typval_compare(
+ typval_T *typ1, /* first operand */
+ typval_T *typ2, /* second operand */
+ exptype_T type, /* operator */
+ int type_is, /* TRUE for "is" and "isnot" */
+ int ic) /* ignore case */
+{
+ int i;
+ varnumber_T n1, n2;
+ char_u *s1, *s2;
+ char_u buf1[NUMBUFLEN], buf2[NUMBUFLEN];
+
+ if (type_is && typ1->v_type != typ2->v_type)
+ {
+ /* For "is" a different type always means FALSE, for "notis"
+ * it means TRUE. */
+ n1 = (type == TYPE_NEQUAL);
+ }
+ else if (typ1->v_type == VAR_BLOB || typ2->v_type == VAR_BLOB)
+ {
+ if (type_is)
+ {
+ n1 = (typ1->v_type == typ2->v_type
+ && typ1->vval.v_blob == typ2->vval.v_blob);
+ if (type == TYPE_NEQUAL)
+ n1 = !n1;
+ }
+ else if (typ1->v_type != typ2->v_type
+ || (type != TYPE_EQUAL && type != TYPE_NEQUAL))
+ {
+ if (typ1->v_type != typ2->v_type)
+ emsg(_("E977: Can only compare Blob with Blob"));
+ else
+ emsg(_(e_invalblob));
+ clear_tv(typ1);
+ return FAIL;
+ }
+ else
+ {
+ // Compare two Blobs for being equal or unequal.
+ n1 = blob_equal(typ1->vval.v_blob, typ2->vval.v_blob);
+ if (type == TYPE_NEQUAL)
+ n1 = !n1;
+ }
+ }
+ else if (typ1->v_type == VAR_LIST || typ2->v_type == VAR_LIST)
+ {
+ if (type_is)
+ {
+ n1 = (typ1->v_type == typ2->v_type
+ && typ1->vval.v_list == typ2->vval.v_list);
+ if (type == TYPE_NEQUAL)
+ n1 = !n1;
+ }
+ else if (typ1->v_type != typ2->v_type
+ || (type != TYPE_EQUAL && type != TYPE_NEQUAL))
+ {
+ if (typ1->v_type != typ2->v_type)
+ emsg(_("E691: Can only compare List with List"));
+ else
+ emsg(_("E692: Invalid operation for List"));
+ clear_tv(typ1);
+ return FAIL;
+ }
+ else
+ {
+ /* Compare two Lists for being equal or unequal. */
+ n1 = list_equal(typ1->vval.v_list, typ2->vval.v_list,
+ ic, FALSE);
+ if (type == TYPE_NEQUAL)
+ n1 = !n1;
+ }
+ }
+
+ else if (typ1->v_type == VAR_DICT || typ2->v_type == VAR_DICT)
+ {
+ if (type_is)
+ {
+ n1 = (typ1->v_type == typ2->v_type
+ && typ1->vval.v_dict == typ2->vval.v_dict);
+ if (type == TYPE_NEQUAL)
+ n1 = !n1;
+ }
+ else if (typ1->v_type != typ2->v_type
+ || (type != TYPE_EQUAL && type != TYPE_NEQUAL))
+ {
+ if (typ1->v_type != typ2->v_type)
+ emsg(_("E735: Can only compare Dictionary with Dictionary"));
+ else
+ emsg(_("E736: Invalid operation for Dictionary"));
+ clear_tv(typ1);
+ return FAIL;
+ }
+ else
+ {
+ /* Compare two Dictionaries for being equal or unequal. */
+ n1 = dict_equal(typ1->vval.v_dict, typ2->vval.v_dict,
+ ic, FALSE);
+ if (type == TYPE_NEQUAL)
+ n1 = !n1;
+ }
+ }
+
+ else if (typ1->v_type == VAR_FUNC || typ2->v_type == VAR_FUNC
+ || typ1->v_type == VAR_PARTIAL || typ2->v_type == VAR_PARTIAL)
+ {
+ if (type != TYPE_EQUAL && type != TYPE_NEQUAL)
+ {
+ emsg(_("E694: Invalid operation for Funcrefs"));
+ clear_tv(typ1);
+ return FAIL;
+ }
+ if ((typ1->v_type == VAR_PARTIAL
+ && typ1->vval.v_partial == NULL)
+ || (typ2->v_type == VAR_PARTIAL
+ && typ2->vval.v_partial == NULL))
+ /* when a partial is NULL assume not equal */
+ n1 = FALSE;
+ else if (type_is)
+ {
+ if (typ1->v_type == VAR_FUNC && typ2->v_type == VAR_FUNC)
+ /* strings are considered the same if their value is
+ * the same */
+ n1 = tv_equal(typ1, typ2, ic, FALSE);
+ else if (typ1->v_type == VAR_PARTIAL
+ && typ2->v_type == VAR_PARTIAL)
+ n1 = (typ1->vval.v_partial == typ2->vval.v_partial);
+ else
+ n1 = FALSE;
+ }
+ else
+ n1 = tv_equal(typ1, typ2, ic, FALSE);
+ if (type == TYPE_NEQUAL)
+ n1 = !n1;
+ }
+
+#ifdef FEAT_FLOAT
+ /*
+ * If one of the two variables is a float, compare as a float.
+ * When using "=~" or "!~", always compare as string.
+ */
+ else if ((typ1->v_type == VAR_FLOAT || typ2->v_type == VAR_FLOAT)
+ && type != TYPE_MATCH && type != TYPE_NOMATCH)
+ {
+ float_T f1, f2;
+
+ if (typ1->v_type == VAR_FLOAT)
+ f1 = typ1->vval.v_float;
+ else
+ f1 = tv_get_number(typ1);
+ if (typ2->v_type == VAR_FLOAT)
+ f2 = typ2->vval.v_float;
+ else
+ f2 = tv_get_number(typ2);
+ n1 = FALSE;
+ switch (type)
+ {
+ case TYPE_EQUAL: n1 = (f1 == f2); break;
+ case TYPE_NEQUAL: n1 = (f1 != f2); break;
+ case TYPE_GREATER: n1 = (f1 > f2); break;
+ case TYPE_GEQUAL: n1 = (f1 >= f2); break;
+ case TYPE_SMALLER: n1 = (f1 < f2); break;
+ case TYPE_SEQUAL: n1 = (f1 <= f2); break;
+ case TYPE_UNKNOWN:
+ case TYPE_MATCH:
+ case TYPE_NOMATCH: break; /* avoid gcc warning */
+ }
+ }
+#endif
+
+ /*
+ * If one of the two variables is a number, compare as a number.
+ * When using "=~" or "!~", always compare as string.
+ */
+ else if ((typ1->v_type == VAR_NUMBER || typ2->v_type == VAR_NUMBER)
+ && type != TYPE_MATCH && type != TYPE_NOMATCH)
+ {
+ n1 = tv_get_number(typ1);
+ n2 = tv_get_number(typ2);
+ switch (type)
+ {
+ case TYPE_EQUAL: n1 = (n1 == n2); break;
+ case TYPE_NEQUAL: n1 = (n1 != n2); break;
+ case TYPE_GREATER: n1 = (n1 > n2); break;
+ case TYPE_GEQUAL: n1 = (n1 >= n2); break;
+ case TYPE_SMALLER: n1 = (n1 < n2); break;
+ case TYPE_SEQUAL: n1 = (n1 <= n2); break;
+ case TYPE_UNKNOWN:
+ case TYPE_MATCH:
+ case TYPE_NOMATCH: break; /* avoid gcc warning */
+ }
+ }
+ else
+ {
+ s1 = tv_get_string_buf(typ1, buf1);
+ s2 = tv_get_string_buf(typ2, buf2);
+ if (type != TYPE_MATCH && type != TYPE_NOMATCH)
+ i = ic ? MB_STRICMP(s1, s2) : STRCMP(s1, s2);
+ else
+ i = 0;
+ n1 = FALSE;
+ switch (type)
+ {
+ case TYPE_EQUAL: n1 = (i == 0); break;
+ case TYPE_NEQUAL: n1 = (i != 0); break;
+ case TYPE_GREATER: n1 = (i > 0); break;
+ case TYPE_GEQUAL: n1 = (i >= 0); break;
+ case TYPE_SMALLER: n1 = (i < 0); break;
+ case TYPE_SEQUAL: n1 = (i <= 0); break;
+
+ case TYPE_MATCH:
+ case TYPE_NOMATCH:
+ n1 = pattern_match(s2, s1, ic);
+ if (type == TYPE_NOMATCH)
+ n1 = !n1;
+ break;
+
+ case TYPE_UNKNOWN: break; /* avoid gcc warning */
+ }
+ }
+ clear_tv(typ1);
+ typ1->v_type = VAR_NUMBER;
+ typ1->vval.v_number = n1;
+
+ return OK;
+}
+
+ char_u *
+typval_tostring(typval_T *arg)
+{
+ char_u *tofree;
+ char_u numbuf[NUMBUFLEN];
+ char_u *ret = NULL;
+
+ if (arg == NULL)
+ return vim_strsave((char_u *)"(does not exist)");
+ ret = tv2string(arg, &tofree, numbuf, 0);
+ /* Make a copy if we have a value but it's not in allocated memory. */
+ if (ret != NULL && tofree == NULL)
+ ret = vim_strsave(ret);
+ return ret;
+}
+
+ int
+var_exists(char_u *var)
+{
+ char_u *name;
+ char_u *tofree;
+ typval_T tv;
+ int len = 0;
+ int n = FALSE;
+
+ /* get_name_len() takes care of expanding curly braces */
+ name = var;
+ len = get_name_len(&var, &tofree, TRUE, FALSE);
+ if (len > 0)
+ {
+ if (tofree != NULL)
+ name = tofree;
+ n = (get_var_tv(name, len, &tv, NULL, FALSE, TRUE) == OK);
+ if (n)
+ {
+ /* handle d.key, l[idx], f(expr) */
+ n = (handle_subscript(&var, &tv, TRUE, FALSE) == OK);
+ if (n)
+ clear_tv(&tv);
+ }
+ }
+ if (*var != NUL)
+ n = FALSE;
+
+ vim_free(tofree);
+ return n;
+}
+
+#endif /* FEAT_EVAL */
+
+
+#if defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) || defined(PROTO)
+
+#ifdef WIN3264
+/*
+ * Functions for ":8" filename modifier: get 8.3 version of a filename.
+ */
+
+/*
+ * Get the short path (8.3) for the filename in "fnamep".
+ * Only works for a valid file name.
+ * When the path gets longer "fnamep" is changed and the allocated buffer
+ * is put in "bufp".
+ * *fnamelen is the length of "fnamep" and set to 0 for a nonexistent path.
+ * Returns OK on success, FAIL on failure.
+ */
+ static int
+get_short_pathname(char_u **fnamep, char_u **bufp, int *fnamelen)
+{
+ int l, len;
+ char_u *newbuf;
+
+ len = *fnamelen;
+ l = GetShortPathName((LPSTR)*fnamep, (LPSTR)*fnamep, len);
+ if (l > len - 1)
+ {
+ /* If that doesn't work (not enough space), then save the string
+ * and try again with a new buffer big enough. */
+ newbuf = vim_strnsave(*fnamep, l);
+ if (newbuf == NULL)
+ return FAIL;
+
+ vim_free(*bufp);
+ *fnamep = *bufp = newbuf;
+
+ /* Really should always succeed, as the buffer is big enough. */
+ l = GetShortPathName((LPSTR)*fnamep, (LPSTR)*fnamep, l+1);
+ }
+
+ *fnamelen = l;
+ return OK;
+}
+
+/*
+ * Get the short path (8.3) for the filename in "fname". The converted
+ * path is returned in "bufp".
+ *
+ * Some of the directories specified in "fname" may not exist. This function
+ * will shorten the existing directories at the beginning of the path and then
+ * append the remaining non-existing path.
+ *
+ * fname - Pointer to the filename to shorten. On return, contains the
+ * pointer to the shortened pathname
+ * bufp - Pointer to an allocated buffer for the filename.
+ * fnamelen - Length of the filename pointed to by fname
+ *
+ * Returns OK on success (or nothing done) and FAIL on failure (out of memory).
+ */
+ static int
+shortpath_for_invalid_fname(
+ char_u **fname,
+ char_u **bufp,
+ int *fnamelen)
+{
+ char_u *short_fname, *save_fname, *pbuf_unused;
+ char_u *endp, *save_endp;
+ char_u ch;
+ int old_len, len;
+ int new_len, sfx_len;
+ int retval = OK;
+
+ /* Make a copy */
+ old_len = *fnamelen;
+ save_fname = vim_strnsave(*fname, old_len);
+ pbuf_unused = NULL;
+ short_fname = NULL;
+
+ endp = save_fname + old_len - 1; /* Find the end of the copy */
+ save_endp = endp;
+
+ /*
+ * Try shortening the supplied path till it succeeds by removing one
+ * directory at a time from the tail of the path.
+ */
+ len = 0;
+ for (;;)
+ {
+ /* go back one path-separator */
+ while (endp > save_fname && !after_pathsep(save_fname, endp + 1))
+ --endp;
+ if (endp <= save_fname)
+ break; /* processed the complete path */
+
+ /*
+ * Replace the path separator with a NUL and try to shorten the
+ * resulting path.
+ */
+ ch = *endp;
+ *endp = 0;
+ short_fname = save_fname;
+ len = (int)STRLEN(short_fname) + 1;
+ if (get_short_pathname(&short_fname, &pbuf_unused, &len) == FAIL)
+ {
+ retval = FAIL;
+ goto theend;
+ }
+ *endp = ch; /* preserve the string */
+
+ if (len > 0)
+ break; /* successfully shortened the path */
+
+ /* failed to shorten the path. Skip the path separator */
+ --endp;
+ }
+
+ if (len > 0)
+ {
+ /*
+ * Succeeded in shortening the path. Now concatenate the shortened
+ * path with the remaining path at the tail.
+ */
+
+ /* Compute the length of the new path. */
+ sfx_len = (int)(save_endp - endp) + 1;
+ new_len = len + sfx_len;
+
+ *fnamelen = new_len;
+ vim_free(*bufp);
+ if (new_len > old_len)
+ {
+ /* There is not enough space in the currently allocated string,
+ * copy it to a buffer big enough. */
+ *fname = *bufp = vim_strnsave(short_fname, new_len);
+ if (*fname == NULL)
+ {
+ retval = FAIL;
+ goto theend;
+ }
+ }
+ else
+ {
+ /* Transfer short_fname to the main buffer (it's big enough),
+ * unless get_short_pathname() did its work in-place. */
+ *fname = *bufp = save_fname;
+ if (short_fname != save_fname)
+ vim_strncpy(save_fname, short_fname, len);
+ save_fname = NULL;
+ }
+
+ /* concat the not-shortened part of the path */
+ vim_strncpy(*fname + len, endp, sfx_len);
+ (*fname)[new_len] = NUL;
+ }
+
+theend:
+ vim_free(pbuf_unused);
+ vim_free(save_fname);
+
+ return retval;
+}
+
+/*
+ * Get a pathname for a partial path.
+ * Returns OK for success, FAIL for failure.
+ */
+ static int
+shortpath_for_partial(
+ char_u **fnamep,
+ char_u **bufp,
+ int *fnamelen)
+{
+ int sepcount, len, tflen;
+ char_u *p;
+ char_u *pbuf, *tfname;
+ int hasTilde;
+
+ /* Count up the path separators from the RHS.. so we know which part
+ * of the path to return. */
+ sepcount = 0;
+ for (p = *fnamep; p < *fnamep + *fnamelen; MB_PTR_ADV(p))
+ if (vim_ispathsep(*p))
+ ++sepcount;
+
+ /* Need full path first (use expand_env() to remove a "~/") */
+ hasTilde = (**fnamep == '~');
+ if (hasTilde)
+ pbuf = tfname = expand_env_save(*fnamep);
+ else
+ pbuf = tfname = FullName_save(*fnamep, FALSE);
+
+ len = tflen = (int)STRLEN(tfname);
+
+ if (get_short_pathname(&tfname, &pbuf, &len) == FAIL)
+ return FAIL;
+
+ if (len == 0)
+ {
+ /* Don't have a valid filename, so shorten the rest of the
+ * path if we can. This CAN give us invalid 8.3 filenames, but
+ * there's not a lot of point in guessing what it might be.
+ */
+ len = tflen;
+ if (shortpath_for_invalid_fname(&tfname, &pbuf, &len) == FAIL)
+ return FAIL;
+ }
+
+ /* Count the paths backward to find the beginning of the desired string. */
+ for (p = tfname + len - 1; p >= tfname; --p)
+ {
+ if (has_mbyte)
+ p -= mb_head_off(tfname, p);
+ if (vim_ispathsep(*p))
+ {
+ if (sepcount == 0 || (hasTilde && sepcount == 1))
+ break;
+ else
+ sepcount --;
+ }
+ }
+ if (hasTilde)
+ {
+ --p;
+ if (p >= tfname)
+ *p = '~';
+ else
+ return FAIL;
+ }
+ else
+ ++p;
+
+ /* Copy in the string - p indexes into tfname - allocated at pbuf */
+ vim_free(*bufp);
+ *fnamelen = (int)STRLEN(p);
+ *bufp = pbuf;
+ *fnamep = p;
+
+ return OK;
+}
+#endif /* WIN3264 */
+
+/*
+ * Adjust a filename, according to a string of modifiers.
+ * *fnamep must be NUL terminated when called. When returning, the length is
+ * determined by *fnamelen.
+ * Returns VALID_ flags or -1 for failure.
+ * When there is an error, *fnamep is set to NULL.
+ */
+ int
+modify_fname(
+ char_u *src, // string with modifiers
+ int tilde_file, // "~" is a file name, not $HOME
+ int *usedlen, // characters after src that are used
+ char_u **fnamep, // file name so far
+ char_u **bufp, // buffer for allocated file name or NULL
+ int *fnamelen) // length of fnamep
+{
+ int valid = 0;
+ char_u *tail;
+ char_u *s, *p, *pbuf;
+ char_u dirname[MAXPATHL];
+ int c;
+ int has_fullname = 0;
+#ifdef WIN3264
+ char_u *fname_start = *fnamep;
+ int has_shortname = 0;
+#endif
+
+repeat:
+ /* ":p" - full path/file_name */
+ if (src[*usedlen] == ':' && src[*usedlen + 1] == 'p')
+ {
+ has_fullname = 1;
+
+ valid |= VALID_PATH;
+ *usedlen += 2;
+
+ /* Expand "~/path" for all systems and "~user/path" for Unix and VMS */
+ if ((*fnamep)[0] == '~'
+#if !defined(UNIX) && !(defined(VMS) && defined(USER_HOME))
+ && ((*fnamep)[1] == '/'
+# ifdef BACKSLASH_IN_FILENAME
+ || (*fnamep)[1] == '\\'
+# endif
+ || (*fnamep)[1] == NUL)
+#endif
+ && !(tilde_file && (*fnamep)[1] == NUL)
+ )
+ {
+ *fnamep = expand_env_save(*fnamep);
+ vim_free(*bufp); /* free any allocated file name */
+ *bufp = *fnamep;
+ if (*fnamep == NULL)
+ return -1;
+ }
+
+ /* When "/." or "/.." is used: force expansion to get rid of it. */
+ for (p = *fnamep; *p != NUL; MB_PTR_ADV(p))
+ {
+ if (vim_ispathsep(*p)
+ && p[1] == '.'
+ && (p[2] == NUL
+ || vim_ispathsep(p[2])
+ || (p[2] == '.'
+ && (p[3] == NUL || vim_ispathsep(p[3])))))
+ break;
+ }
+
+ /* FullName_save() is slow, don't use it when not needed. */
+ if (*p != NUL || !vim_isAbsName(*fnamep))
+ {
+ *fnamep = FullName_save(*fnamep, *p != NUL);
+ vim_free(*bufp); /* free any allocated file name */
+ *bufp = *fnamep;
+ if (*fnamep == NULL)
+ return -1;
+ }
+
+#ifdef WIN3264
+# if _WIN32_WINNT >= 0x0500
+ if (vim_strchr(*fnamep, '~') != NULL)
+ {
+ /* Expand 8.3 filename to full path. Needed to make sure the same
+ * file does not have two different names.
+ * Note: problem does not occur if _WIN32_WINNT < 0x0500. */
+ p = alloc(_MAX_PATH + 1);
+ if (p != NULL)
+ {
+ if (GetLongPathName((LPSTR)*fnamep, (LPSTR)p, _MAX_PATH))
+ {
+ vim_free(*bufp);
+ *bufp = *fnamep = p;
+ }
+ else
+ vim_free(p);
+ }
+ }
+# endif
+#endif
+ /* Append a path separator to a directory. */
+ if (mch_isdir(*fnamep))
+ {
+ /* Make room for one or two extra characters. */
+ *fnamep = vim_strnsave(*fnamep, (int)STRLEN(*fnamep) + 2);
+ vim_free(*bufp); /* free any allocated file name */
+ *bufp = *fnamep;
+ if (*fnamep == NULL)
+ return -1;
+ add_pathsep(*fnamep);
+ }
+ }
+
+ /* ":." - path relative to the current directory */
+ /* ":~" - path relative to the home directory */
+ /* ":8" - shortname path - postponed till after */
+ while (src[*usedlen] == ':'
+ && ((c = src[*usedlen + 1]) == '.' || c == '~' || c == '8'))
+ {
+ *usedlen += 2;
+ if (c == '8')
+ {
+#ifdef WIN3264
+ has_shortname = 1; /* Postpone this. */
+#endif
+ continue;
+ }
+ pbuf = NULL;
+ /* Need full path first (use expand_env() to remove a "~/") */
+ if (!has_fullname)
+ {
+ if (c == '.' && **fnamep == '~')
+ p = pbuf = expand_env_save(*fnamep);
+ else
+ p = pbuf = FullName_save(*fnamep, FALSE);
+ }
+ else
+ p = *fnamep;
+
+ has_fullname = 0;
+
+ if (p != NULL)
+ {
+ if (c == '.')
+ {
+ mch_dirname(dirname, MAXPATHL);
+ s = shorten_fname(p, dirname);
+ if (s != NULL)
+ {
+ *fnamep = s;
+ if (pbuf != NULL)
+ {
+ vim_free(*bufp); /* free any allocated file name */
+ *bufp = pbuf;
+ pbuf = NULL;
+ }
+ }
+ }
+ else
+ {
+ home_replace(NULL, p, dirname, MAXPATHL, TRUE);
+ /* Only replace it when it starts with '~' */
+ if (*dirname == '~')
+ {
+ s = vim_strsave(dirname);
+ if (s != NULL)
+ {
+ *fnamep = s;
+ vim_free(*bufp);
+ *bufp = s;
+ }
+ }
+ }
+ vim_free(pbuf);
+ }
+ }
+
+ tail = gettail(*fnamep);
+ *fnamelen = (int)STRLEN(*fnamep);
+
+ /* ":h" - head, remove "/file_name", can be repeated */
+ /* Don't remove the first "/" or "c:\" */
+ while (src[*usedlen] == ':' && src[*usedlen + 1] == 'h')
+ {
+ valid |= VALID_HEAD;
+ *usedlen += 2;
+ s = get_past_head(*fnamep);
+ while (tail > s && after_pathsep(s, tail))
+ MB_PTR_BACK(*fnamep, tail);
+ *fnamelen = (int)(tail - *fnamep);
+#ifdef VMS
+ if (*fnamelen > 0)
+ *fnamelen += 1; /* the path separator is part of the path */
+#endif
+ if (*fnamelen == 0)
+ {
+ /* Result is empty. Turn it into "." to make ":cd %:h" work. */
+ p = vim_strsave((char_u *)".");
+ if (p == NULL)
+ return -1;
+ vim_free(*bufp);
+ *bufp = *fnamep = tail = p;
+ *fnamelen = 1;
+ }
+ else
+ {
+ while (tail > s && !after_pathsep(s, tail))
+ MB_PTR_BACK(*fnamep, tail);
+ }
+ }
+
+ /* ":8" - shortname */
+ if (src[*usedlen] == ':' && src[*usedlen + 1] == '8')
+ {
+ *usedlen += 2;
+#ifdef WIN3264
+ has_shortname = 1;
+#endif
+ }
+
+#ifdef WIN3264
+ /*
+ * Handle ":8" after we have done 'heads' and before we do 'tails'.
+ */
+ if (has_shortname)
+ {
+ /* Copy the string if it is shortened by :h and when it wasn't copied
+ * yet, because we are going to change it in place. Avoids changing
+ * the buffer name for "%:8". */
+ if (*fnamelen < (int)STRLEN(*fnamep) || *fnamep == fname_start)
+ {
+ p = vim_strnsave(*fnamep, *fnamelen);
+ if (p == NULL)
+ return -1;
+ vim_free(*bufp);
+ *bufp = *fnamep = p;
+ }
+
+ /* Split into two implementations - makes it easier. First is where
+ * there isn't a full name already, second is where there is. */
+ if (!has_fullname && !vim_isAbsName(*fnamep))
+ {
+ if (shortpath_for_partial(fnamep, bufp, fnamelen) == FAIL)
+ return -1;
+ }
+ else
+ {
+ int l = *fnamelen;
+
+ /* Simple case, already have the full-name.
+ * Nearly always shorter, so try first time. */
+ if (get_short_pathname(fnamep, bufp, &l) == FAIL)
+ return -1;
+
+ if (l == 0)
+ {
+ /* Couldn't find the filename, search the paths. */
+ l = *fnamelen;
+ if (shortpath_for_invalid_fname(fnamep, bufp, &l) == FAIL)
+ return -1;
+ }
+ *fnamelen = l;
+ }
+ }
+#endif /* WIN3264 */
+
+ /* ":t" - tail, just the basename */
+ if (src[*usedlen] == ':' && src[*usedlen + 1] == 't')
+ {
+ *usedlen += 2;
+ *fnamelen -= (int)(tail - *fnamep);
+ *fnamep = tail;
+ }
+
+ /* ":e" - extension, can be repeated */
+ /* ":r" - root, without extension, can be repeated */
+ while (src[*usedlen] == ':'
+ && (src[*usedlen + 1] == 'e' || src[*usedlen + 1] == 'r'))
+ {
+ /* find a '.' in the tail:
+ * - for second :e: before the current fname
+ * - otherwise: The last '.'
+ */
+ if (src[*usedlen + 1] == 'e' && *fnamep > tail)
+ s = *fnamep - 2;
+ else
+ s = *fnamep + *fnamelen - 1;
+ for ( ; s > tail; --s)
+ if (s[0] == '.')
+ break;
+ if (src[*usedlen + 1] == 'e') /* :e */
+ {
+ if (s > tail)
+ {
+ *fnamelen += (int)(*fnamep - (s + 1));
+ *fnamep = s + 1;
+#ifdef VMS
+ /* cut version from the extension */
+ s = *fnamep + *fnamelen - 1;
+ for ( ; s > *fnamep; --s)
+ if (s[0] == ';')
+ break;
+ if (s > *fnamep)
+ *fnamelen = s - *fnamep;
+#endif
+ }
+ else if (*fnamep <= tail)
+ *fnamelen = 0;
+ }
+ else /* :r */
+ {
+ if (s > tail) /* remove one extension */
+ *fnamelen = (int)(s - *fnamep);
+ }
+ *usedlen += 2;
+ }
+
+ /* ":s?pat?foo?" - substitute */
+ /* ":gs?pat?foo?" - global substitute */
+ if (src[*usedlen] == ':'
+ && (src[*usedlen + 1] == 's'
+ || (src[*usedlen + 1] == 'g' && src[*usedlen + 2] == 's')))
+ {
+ char_u *str;
+ char_u *pat;
+ char_u *sub;
+ int sep;
+ char_u *flags;
+ int didit = FALSE;
+
+ flags = (char_u *)"";
+ s = src + *usedlen + 2;
+ if (src[*usedlen + 1] == 'g')
+ {
+ flags = (char_u *)"g";
+ ++s;
+ }
+
+ sep = *s++;
+ if (sep)
+ {
+ /* find end of pattern */
+ p = vim_strchr(s, sep);
+ if (p != NULL)
+ {
+ pat = vim_strnsave(s, (int)(p - s));
+ if (pat != NULL)
+ {
+ s = p + 1;
+ /* find end of substitution */
+ p = vim_strchr(s, sep);
+ if (p != NULL)
+ {
+ sub = vim_strnsave(s, (int)(p - s));
+ str = vim_strnsave(*fnamep, *fnamelen);
+ if (sub != NULL && str != NULL)
+ {
+ *usedlen = (int)(p + 1 - src);
+ s = do_string_sub(str, pat, sub, NULL, flags);
+ if (s != NULL)
+ {
+ *fnamep = s;
+ *fnamelen = (int)STRLEN(s);
+ vim_free(*bufp);
+ *bufp = s;
+ didit = TRUE;
+ }
+ }
+ vim_free(sub);
+ vim_free(str);
+ }
+ vim_free(pat);
+ }
+ }
+ /* after using ":s", repeat all the modifiers */
+ if (didit)
+ goto repeat;
+ }
+ }
+
+ if (src[*usedlen] == ':' && src[*usedlen + 1] == 'S')
+ {
+ /* vim_strsave_shellescape() needs a NUL terminated string. */
+ c = (*fnamep)[*fnamelen];
+ if (c != NUL)
+ (*fnamep)[*fnamelen] = NUL;
+ p = vim_strsave_shellescape(*fnamep, FALSE, FALSE);
+ if (c != NUL)
+ (*fnamep)[*fnamelen] = c;
+ if (p == NULL)
+ return -1;
+ vim_free(*bufp);
+ *bufp = *fnamep = p;
+ *fnamelen = (int)STRLEN(p);
+ *usedlen += 2;
+ }
+
+ return valid;
+}
+
+/*
+ * Perform a substitution on "str" with pattern "pat" and substitute "sub".
+ * When "sub" is NULL "expr" is used, must be a VAR_FUNC or VAR_PARTIAL.
+ * "flags" can be "g" to do a global substitute.
+ * Returns an allocated string, NULL for error.
+ */
+ char_u *
+do_string_sub(
+ char_u *str,
+ char_u *pat,
+ char_u *sub,
+ typval_T *expr,
+ char_u *flags)
+{
+ int sublen;
+ regmatch_T regmatch;
+ int i;
+ int do_all;
+ char_u *tail;
+ char_u *end;
+ garray_T ga;
+ char_u *ret;
+ char_u *save_cpo;
+ char_u *zero_width = NULL;
+
+ /* Make 'cpoptions' empty, so that the 'l' flag doesn't work here */
+ save_cpo = p_cpo;
+ p_cpo = empty_option;
+
+ ga_init2(&ga, 1, 200);
+
+ do_all = (flags[0] == 'g');
+
+ regmatch.rm_ic = p_ic;
+ regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
+ if (regmatch.regprog != NULL)
+ {
+ tail = str;
+ end = str + STRLEN(str);
+ while (vim_regexec_nl(&regmatch, str, (colnr_T)(tail - str)))
+ {
+ /* Skip empty match except for first match. */
+ if (regmatch.startp[0] == regmatch.endp[0])
+ {
+ if (zero_width == regmatch.startp[0])
+ {
+ /* avoid getting stuck on a match with an empty string */
+ i = MB_PTR2LEN(tail);
+ mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail,
+ (size_t)i);
+ ga.ga_len += i;
+ tail += i;
+ continue;
+ }
+ zero_width = regmatch.startp[0];
+ }
+
+ /*
+ * Get some space for a temporary buffer to do the substitution
+ * into. It will contain:
+ * - The text up to where the match is.
+ * - The substituted text.
+ * - The text after the match.
+ */
+ sublen = vim_regsub(&regmatch, sub, expr, tail, FALSE, TRUE, FALSE);
+ if (ga_grow(&ga, (int)((end - tail) + sublen -
+ (regmatch.endp[0] - regmatch.startp[0]))) == FAIL)
+ {
+ ga_clear(&ga);
+ break;
+ }
+
+ /* copy the text up to where the match is */
+ i = (int)(regmatch.startp[0] - tail);
+ mch_memmove((char_u *)ga.ga_data + ga.ga_len, tail, (size_t)i);
+ /* add the substituted text */
+ (void)vim_regsub(&regmatch, sub, expr, (char_u *)ga.ga_data
+ + ga.ga_len + i, TRUE, TRUE, FALSE);
+ ga.ga_len += i + sublen - 1;
+ tail = regmatch.endp[0];
+ if (*tail == NUL)
+ break;
+ if (!do_all)
+ break;
+ }
+
+ if (ga.ga_data != NULL)
+ STRCPY((char *)ga.ga_data + ga.ga_len, tail);
+
+ vim_regfree(regmatch.regprog);
+ }
+
+ ret = vim_strsave(ga.ga_data == NULL ? str : (char_u *)ga.ga_data);
+ ga_clear(&ga);
+ if (p_cpo == empty_option)
+ p_cpo = save_cpo;
+ else
+ /* Darn, evaluating {sub} expression or {expr} changed the value. */
+ free_string_option(save_cpo);
+
+ return ret;
+}
+
+ static int
+filter_map_one(typval_T *tv, typval_T *expr, int map, int *remp)
+{
+ typval_T rettv;
+ typval_T argv[3];
+ int retval = FAIL;
+
+ copy_tv(tv, &vimvars[VV_VAL].vv_tv);
+ argv[0] = vimvars[VV_KEY].vv_tv;
+ argv[1] = vimvars[VV_VAL].vv_tv;
+ if (eval_expr_typval(expr, argv, 2, &rettv) == FAIL)
+ goto theend;
+ if (map)
+ {
+ /* map(): replace the list item value */
+ clear_tv(tv);
+ rettv.v_lock = 0;
+ *tv = rettv;
+ }
+ else
+ {
+ int error = FALSE;
+
+ /* filter(): when expr is zero remove the item */
+ *remp = (tv_get_number_chk(&rettv, &error) == 0);
+ clear_tv(&rettv);
+ /* On type error, nothing has been removed; return FAIL to stop the
+ * loop. The error message was given by tv_get_number_chk(). */
+ if (error)
+ goto theend;
+ }
+ retval = OK;
+theend:
+ clear_tv(&vimvars[VV_VAL].vv_tv);
+ return retval;
+}
+
+
+/*
+ * Implementation of map() and filter().
+ */
+ void
+filter_map(typval_T *argvars, typval_T *rettv, int map)
+{
+ typval_T *expr;
+ listitem_T *li, *nli;
+ list_T *l = NULL;
+ dictitem_T *di;
+ hashtab_T *ht;
+ hashitem_T *hi;
+ dict_T *d = NULL;
+ typval_T save_val;
+ typval_T save_key;
+ blob_T *b = NULL;
+ int rem;
+ int todo;
+ char_u *ermsg = (char_u *)(map ? "map()" : "filter()");
+ char_u *arg_errmsg = (char_u *)(map ? N_("map() argument")
+ : N_("filter() argument"));
+ int save_did_emsg;
+ int idx = 0;
+
+ if (argvars[0].v_type == VAR_BLOB)
+ {
+ if ((b = argvars[0].vval.v_blob) == NULL)
+ return;
+ }
+ else if (argvars[0].v_type == VAR_LIST)
+ {
+ if ((l = argvars[0].vval.v_list) == NULL
+ || (!map && tv_check_lock(l->lv_lock, arg_errmsg, TRUE)))
+ return;
+ }
+ else if (argvars[0].v_type == VAR_DICT)
+ {
+ if ((d = argvars[0].vval.v_dict) == NULL
+ || (!map && tv_check_lock(d->dv_lock, arg_errmsg, TRUE)))
+ return;
+ }
+ else
+ {
+ semsg(_(e_listdictarg), ermsg);
+ return;
+ }
+
+ expr = &argvars[1];
+ /* On type errors, the preceding call has already displayed an error
+ * message. Avoid a misleading error message for an empty string that
+ * was not passed as argument. */
+ if (expr->v_type != VAR_UNKNOWN)
+ {
+ prepare_vimvar(VV_VAL, &save_val);
+
+ /* We reset "did_emsg" to be able to detect whether an error
+ * occurred during evaluation of the expression. */
+ save_did_emsg = did_emsg;
+ did_emsg = FALSE;
+
+ prepare_vimvar(VV_KEY, &save_key);
+ if (argvars[0].v_type == VAR_DICT)
+ {
+ vimvars[VV_KEY].vv_type = VAR_STRING;
+
+ ht = &d->dv_hashtab;
+ hash_lock(ht);
+ todo = (int)ht->ht_used;
+ for (hi = ht->ht_array; todo > 0; ++hi)
+ {
+ if (!HASHITEM_EMPTY(hi))
+ {
+ int r;
+
+ --todo;
+ di = HI2DI(hi);
+ if (map &&
+ (tv_check_lock(di->di_tv.v_lock, arg_errmsg, TRUE)
+ || var_check_ro(di->di_flags, arg_errmsg, TRUE)))
+ break;
+ vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
+ r = filter_map_one(&di->di_tv, expr, map, &rem);
+ clear_tv(&vimvars[VV_KEY].vv_tv);
+ if (r == FAIL || did_emsg)
+ break;
+ if (!map && rem)
+ {
+ if (var_check_fixed(di->di_flags, arg_errmsg, TRUE)
+ || var_check_ro(di->di_flags, arg_errmsg, TRUE))
+ break;
+ dictitem_remove(d, di);
+ }
+ }
+ }
+ hash_unlock(ht);
+ }
+ else if (argvars[0].v_type == VAR_BLOB)
+ {
+ int i;
+ typval_T tv;
+
+ vimvars[VV_KEY].vv_type = VAR_NUMBER;
+ for (i = 0; i < b->bv_ga.ga_len; i++)
+ {
+ tv.v_type = VAR_NUMBER;
+ tv.vval.v_number = blob_get(b, i);
+ vimvars[VV_KEY].vv_nr = idx;
+ if (filter_map_one(&tv, expr, map, &rem) == FAIL || did_emsg)
+ break;
+ if (tv.v_type != VAR_NUMBER)
+ {
+ emsg(_(e_invalblob));
+ return;
+ }
+ tv.v_type = VAR_NUMBER;
+ blob_set(b, i, tv.vval.v_number);
+ if (!map && rem)
+ {
+ char_u *p = (char_u *)argvars[0].vval.v_blob->bv_ga.ga_data;
+
+ mch_memmove(p + idx, p + i + 1,
+ (size_t)b->bv_ga.ga_len - i - 1);
+ --b->bv_ga.ga_len;
+ --i;
+ }
+ }
+ }
+ else
+ {
+ // argvars[0].v_type == VAR_LIST
+ vimvars[VV_KEY].vv_type = VAR_NUMBER;
+
+ for (li = l->lv_first; li != NULL; li = nli)
+ {
+ if (map && tv_check_lock(li->li_tv.v_lock, arg_errmsg, TRUE))
+ break;
+ nli = li->li_next;
+ vimvars[VV_KEY].vv_nr = idx;
+ if (filter_map_one(&li->li_tv, expr, map, &rem) == FAIL
+ || did_emsg)
+ break;
+ if (!map && rem)
+ listitem_remove(l, li);
+ ++idx;
+ }
+ }
+
+ restore_vimvar(VV_KEY, &save_key);
+ restore_vimvar(VV_VAL, &save_val);
+
+ did_emsg |= save_did_emsg;
+ }
+
+ copy_tv(&argvars[0], rettv);
+}
+
+#endif /* defined(FEAT_MODIFY_FNAME) || defined(FEAT_EVAL) */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 00:05:05 +0000