diff options
Diffstat (limited to 'src/findfile.c')
| -rw-r--r-- | src/findfile.c | 2781 |
1 files changed, 2781 insertions, 0 deletions
diff --git a/src/findfile.c b/src/findfile.c new file mode 100644 index 0000000..e0d9d66 --- /dev/null +++ b/src/findfile.c @@ -0,0 +1,2781 @@ +/* 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. + */ + +/* + * findfile.c: Search for files in directories listed in 'path' + */ + +#include "vim.h" + +/* + * File searching functions for 'path', 'tags' and 'cdpath' options. + * External visible functions: + * vim_findfile_init() creates/initialises the search context + * vim_findfile_free_visited() free list of visited files/dirs of search + * context + * vim_findfile() find a file in the search context + * vim_findfile_cleanup() cleanup/free search context created by + * vim_findfile_init() + * + * All static functions and variables start with 'ff_' + * + * In general it works like this: + * First you create yourself a search context by calling vim_findfile_init(). + * It is possible to give a search context from a previous call to + * vim_findfile_init(), so it can be reused. After this you call vim_findfile() + * until you are satisfied with the result or it returns NULL. On every call it + * returns the next file which matches the conditions given to + * vim_findfile_init(). If it doesn't find a next file it returns NULL. + * + * It is possible to call vim_findfile_init() again to reinitialise your search + * with some new parameters. Don't forget to pass your old search context to + * it, so it can reuse it and especially reuse the list of already visited + * directories. If you want to delete the list of already visited directories + * simply call vim_findfile_free_visited(). + * + * When you are done call vim_findfile_cleanup() to free the search context. + * + * The function vim_findfile_init() has a long comment, which describes the + * needed parameters. + * + * + * + * ATTENTION: + * ========== + * Also we use an allocated search context here, this functions are NOT + * thread-safe!!!!! + * + * To minimize parameter passing (or because I'm to lazy), only the + * external visible functions get a search context as a parameter. This is + * then assigned to a static global, which is used throughout the local + * functions. + */ + +/* + * type for the directory search stack + */ +typedef struct ff_stack +{ + struct ff_stack *ffs_prev; + + // the fix part (no wildcards) and the part containing the wildcards + // of the search path + char_u *ffs_fix_path; + char_u *ffs_wc_path; + + // files/dirs found in the above directory, matched by the first wildcard + // of wc_part + char_u **ffs_filearray; + int ffs_filearray_size; + int ffs_filearray_cur; // needed for partly handled dirs + + // to store status of partly handled directories + // 0: we work on this directory for the first time + // 1: this directory was partly searched in an earlier step + int ffs_stage; + + // How deep are we in the directory tree? + // Counts backward from value of level parameter to vim_findfile_init + int ffs_level; + + // Did we already expand '**' to an empty string? + int ffs_star_star_empty; +} ff_stack_T; + +/* + * type for already visited directories or files. + */ +typedef struct ff_visited +{ + struct ff_visited *ffv_next; + + // Visited directories are different if the wildcard string are + // different. So we have to save it. + char_u *ffv_wc_path; + + // for unix use inode etc for comparison (needed because of links), else + // use filename. +#ifdef UNIX + int ffv_dev_valid; // ffv_dev and ffv_ino were set + dev_t ffv_dev; // device number + ino_t ffv_ino; // inode number +#endif + // The memory for this struct is allocated according to the length of + // ffv_fname. + char_u ffv_fname[1]; // actually longer +} ff_visited_T; + +/* + * We might have to manage several visited lists during a search. + * This is especially needed for the tags option. If tags is set to: + * "./++/tags,./++/TAGS,++/tags" (replace + with *) + * So we have to do 3 searches: + * 1) search from the current files directory downward for the file "tags" + * 2) search from the current files directory downward for the file "TAGS" + * 3) search from Vims current directory downwards for the file "tags" + * As you can see, the first and the third search are for the same file, so for + * the third search we can use the visited list of the first search. For the + * second search we must start from a empty visited list. + * The struct ff_visited_list_hdr is used to manage a linked list of already + * visited lists. + */ +typedef struct ff_visited_list_hdr +{ + struct ff_visited_list_hdr *ffvl_next; + + // the filename the attached visited list is for + char_u *ffvl_filename; + + ff_visited_T *ffvl_visited_list; + +} ff_visited_list_hdr_T; + + +/* + * '**' can be expanded to several directory levels. + * Set the default maximum depth. + */ +#define FF_MAX_STAR_STAR_EXPAND ((char_u)30) + +/* + * The search context: + * ffsc_stack_ptr: the stack for the dirs to search + * ffsc_visited_list: the currently active visited list + * ffsc_dir_visited_list: the currently active visited list for search dirs + * ffsc_visited_lists_list: the list of all visited lists + * ffsc_dir_visited_lists_list: the list of all visited lists for search dirs + * ffsc_file_to_search: the file to search for + * ffsc_start_dir: the starting directory, if search path was relative + * ffsc_fix_path: the fix part of the given path (without wildcards) + * Needed for upward search. + * ffsc_wc_path: the part of the given path containing wildcards + * ffsc_level: how many levels of dirs to search downwards + * ffsc_stopdirs_v: array of stop directories for upward search + * ffsc_find_what: FINDFILE_BOTH, FINDFILE_DIR or FINDFILE_FILE + * ffsc_tagfile: searching for tags file, don't use 'suffixesadd' + */ +typedef struct ff_search_ctx_T +{ + ff_stack_T *ffsc_stack_ptr; + ff_visited_list_hdr_T *ffsc_visited_list; + ff_visited_list_hdr_T *ffsc_dir_visited_list; + ff_visited_list_hdr_T *ffsc_visited_lists_list; + ff_visited_list_hdr_T *ffsc_dir_visited_lists_list; + char_u *ffsc_file_to_search; + char_u *ffsc_start_dir; + char_u *ffsc_fix_path; + char_u *ffsc_wc_path; + int ffsc_level; + char_u **ffsc_stopdirs_v; + int ffsc_find_what; + int ffsc_tagfile; +} ff_search_ctx_T; + +// locally needed functions +static int ff_check_visited(ff_visited_T **, char_u *, char_u *); +static void vim_findfile_free_visited(void *search_ctx_arg); +static void vim_findfile_free_visited_list(ff_visited_list_hdr_T **list_headp); +static void ff_free_visited_list(ff_visited_T *vl); +static ff_visited_list_hdr_T* ff_get_visited_list(char_u *, ff_visited_list_hdr_T **list_headp); + +static void ff_push(ff_search_ctx_T *search_ctx, ff_stack_T *stack_ptr); +static ff_stack_T *ff_pop(ff_search_ctx_T *search_ctx); +static void ff_clear(ff_search_ctx_T *search_ctx); +static void ff_free_stack_element(ff_stack_T *stack_ptr); +static ff_stack_T *ff_create_stack_element(char_u *, char_u *, int, int); +static int ff_path_in_stoplist(char_u *, int, char_u **); + +static char_u *ff_expand_buffer = NULL; // used for expanding filenames + +#if 0 +/* + * if someone likes findfirst/findnext, here are the functions + * NOT TESTED!! + */ + +static void *ff_fn_search_context = NULL; + + char_u * +vim_findfirst(char_u *path, char_u *filename, int level) +{ + ff_fn_search_context = + vim_findfile_init(path, filename, NULL, level, TRUE, FALSE, + ff_fn_search_context, rel_fname); + if (NULL == ff_fn_search_context) + return NULL; + else + return vim_findnext() +} + + char_u * +vim_findnext(void) +{ + char_u *ret = vim_findfile(ff_fn_search_context); + + if (NULL == ret) + { + vim_findfile_cleanup(ff_fn_search_context); + ff_fn_search_context = NULL; + } + return ret; +} +#endif + +/* + * Initialization routine for vim_findfile(). + * + * Returns the newly allocated search context or NULL if an error occurred. + * + * Don't forget to clean up by calling vim_findfile_cleanup() if you are done + * with the search context. + * + * Find the file 'filename' in the directory 'path'. + * The parameter 'path' may contain wildcards. If so only search 'level' + * directories deep. The parameter 'level' is the absolute maximum and is + * not related to restricts given to the '**' wildcard. If 'level' is 100 + * and you use '**200' vim_findfile() will stop after 100 levels. + * + * 'filename' cannot contain wildcards! It is used as-is, no backslashes to + * escape special characters. + * + * If 'stopdirs' is not NULL and nothing is found downward, the search is + * restarted on the next higher directory level. This is repeated until the + * start-directory of a search is contained in 'stopdirs'. 'stopdirs' has the + * format ";*<dirname>*\(;<dirname>\)*;\=$". + * + * If the 'path' is relative, the starting dir for the search is either VIM's + * current dir or if the path starts with "./" the current files dir. + * If the 'path' is absolute, the starting dir is that part of the path before + * the first wildcard. + * + * Upward search is only done on the starting dir. + * + * If 'free_visited' is TRUE the list of already visited files/directories is + * cleared. Set this to FALSE if you just want to search from another + * directory, but want to be sure that no directory from a previous search is + * searched again. This is useful if you search for a file at different places. + * The list of visited files/dirs can also be cleared with the function + * vim_findfile_free_visited(). + * + * Set the parameter 'find_what' to FINDFILE_DIR if you want to search for + * directories only, FINDFILE_FILE for files only, FINDFILE_BOTH for both. + * + * A search context returned by a previous call to vim_findfile_init() can be + * passed in the parameter "search_ctx_arg". This context is reused and + * reinitialized with the new parameters. The list of already visited + * directories from this context is only deleted if the parameter + * "free_visited" is true. Be aware that the passed "search_ctx_arg" is freed + * if the reinitialization fails. + * + * If you don't have a search context from a previous call "search_ctx_arg" + * must be NULL. + * + * This function silently ignores a few errors, vim_findfile() will have + * limited functionality then. + */ + void * +vim_findfile_init( + char_u *path, + char_u *filename, + char_u *stopdirs UNUSED, + int level, + int free_visited, + int find_what, + void *search_ctx_arg, + int tagfile, // expanding names of tags files + char_u *rel_fname) // file name to use for "." +{ + char_u *wc_part; + ff_stack_T *sptr; + ff_search_ctx_T *search_ctx; + + // If a search context is given by the caller, reuse it, else allocate a + // new one. + if (search_ctx_arg != NULL) + search_ctx = search_ctx_arg; + else + { + search_ctx = ALLOC_CLEAR_ONE(ff_search_ctx_T); + if (search_ctx == NULL) + goto error_return; + } + search_ctx->ffsc_find_what = find_what; + search_ctx->ffsc_tagfile = tagfile; + + // clear the search context, but NOT the visited lists + ff_clear(search_ctx); + + // clear visited list if wanted + if (free_visited == TRUE) + vim_findfile_free_visited(search_ctx); + else + { + // Reuse old visited lists. Get the visited list for the given + // filename. If no list for the current filename exists, creates a new + // one. + search_ctx->ffsc_visited_list = ff_get_visited_list(filename, + &search_ctx->ffsc_visited_lists_list); + if (search_ctx->ffsc_visited_list == NULL) + goto error_return; + search_ctx->ffsc_dir_visited_list = ff_get_visited_list(filename, + &search_ctx->ffsc_dir_visited_lists_list); + if (search_ctx->ffsc_dir_visited_list == NULL) + goto error_return; + } + + if (ff_expand_buffer == NULL) + { + ff_expand_buffer = alloc(MAXPATHL); + if (ff_expand_buffer == NULL) + goto error_return; + } + + // Store information on starting dir now if path is relative. + // If path is absolute, we do that later. + if (path[0] == '.' + && (vim_ispathsep(path[1]) || path[1] == NUL) + && (!tagfile || vim_strchr(p_cpo, CPO_DOTTAG) == NULL) + && rel_fname != NULL) + { + int len = (int)(gettail(rel_fname) - rel_fname); + + if (!vim_isAbsName(rel_fname) && len + 1 < MAXPATHL) + { + // Make the start dir an absolute path name. + vim_strncpy(ff_expand_buffer, rel_fname, len); + search_ctx->ffsc_start_dir = FullName_save(ff_expand_buffer, FALSE); + } + else + search_ctx->ffsc_start_dir = vim_strnsave(rel_fname, len); + if (search_ctx->ffsc_start_dir == NULL) + goto error_return; + if (*++path != NUL) + ++path; + } + else if (*path == NUL || !vim_isAbsName(path)) + { +#ifdef BACKSLASH_IN_FILENAME + // "c:dir" needs "c:" to be expanded, otherwise use current dir + if (*path != NUL && path[1] == ':') + { + char_u drive[3]; + + drive[0] = path[0]; + drive[1] = ':'; + drive[2] = NUL; + if (vim_FullName(drive, ff_expand_buffer, MAXPATHL, TRUE) == FAIL) + goto error_return; + path += 2; + } + else +#endif + if (mch_dirname(ff_expand_buffer, MAXPATHL) == FAIL) + goto error_return; + + search_ctx->ffsc_start_dir = vim_strsave(ff_expand_buffer); + if (search_ctx->ffsc_start_dir == NULL) + goto error_return; + +#ifdef BACKSLASH_IN_FILENAME + // A path that starts with "/dir" is relative to the drive, not to the + // directory (but not for "//machine/dir"). Only use the drive name. + if ((*path == '/' || *path == '\\') + && path[1] != path[0] + && search_ctx->ffsc_start_dir[1] == ':') + search_ctx->ffsc_start_dir[2] = NUL; +#endif + } + + /* + * If stopdirs are given, split them into an array of pointers. + * If this fails (mem allocation), there is no upward search at all or a + * stop directory is not recognized -> continue silently. + * If stopdirs just contains a ";" or is empty, + * search_ctx->ffsc_stopdirs_v will only contain a NULL pointer. This + * is handled as unlimited upward search. See function + * ff_path_in_stoplist() for details. + */ + if (stopdirs != NULL) + { + char_u *walker = stopdirs; + int dircount; + + while (*walker == ';') + walker++; + + dircount = 1; + search_ctx->ffsc_stopdirs_v = ALLOC_ONE(char_u *); + + if (search_ctx->ffsc_stopdirs_v != NULL) + { + do + { + char_u *helper; + void *ptr; + + helper = walker; + ptr = vim_realloc(search_ctx->ffsc_stopdirs_v, + (dircount + 1) * sizeof(char_u *)); + if (ptr) + search_ctx->ffsc_stopdirs_v = ptr; + else + // ignore, keep what we have and continue + break; + walker = vim_strchr(walker, ';'); + if (walker) + { + search_ctx->ffsc_stopdirs_v[dircount-1] = + vim_strnsave(helper, walker - helper); + walker++; + } + else + // this might be "", which means ascent till top + // of directory tree. + search_ctx->ffsc_stopdirs_v[dircount-1] = + vim_strsave(helper); + + dircount++; + + } while (walker != NULL); + search_ctx->ffsc_stopdirs_v[dircount-1] = NULL; + } + } + + search_ctx->ffsc_level = level; + + /* + * split into: + * -fix path + * -wildcard_stuff (might be NULL) + */ + wc_part = vim_strchr(path, '*'); + if (wc_part != NULL) + { + int llevel; + int len; + char *errpt; + + // save the fix part of the path + search_ctx->ffsc_fix_path = vim_strnsave(path, wc_part - path); + + /* + * copy wc_path and add restricts to the '**' wildcard. + * The octet after a '**' is used as a (binary) counter. + * So '**3' is transposed to '**^C' ('^C' is ASCII value 3) + * or '**76' is transposed to '**N'( 'N' is ASCII value 76). + * If no restrict is given after '**' the default is used. + * Due to this technique the path looks awful if you print it as a + * string. + */ + len = 0; + while (*wc_part != NUL) + { + if (len + 5 >= MAXPATHL) + { + emsg(_(e_path_too_long_for_completion)); + break; + } + if (STRNCMP(wc_part, "**", 2) == 0) + { + ff_expand_buffer[len++] = *wc_part++; + ff_expand_buffer[len++] = *wc_part++; + + llevel = strtol((char *)wc_part, &errpt, 10); + if ((char_u *)errpt != wc_part && llevel > 0 && llevel < 255) + ff_expand_buffer[len++] = llevel; + else if ((char_u *)errpt != wc_part && llevel == 0) + // restrict is 0 -> remove already added '**' + len -= 2; + else + ff_expand_buffer[len++] = FF_MAX_STAR_STAR_EXPAND; + wc_part = (char_u *)errpt; + if (*wc_part != NUL && !vim_ispathsep(*wc_part)) + { + semsg(_(e_invalid_path_number_must_be_at_end_of_path_or_be_followed_by_str), PATHSEPSTR); + goto error_return; + } + } + else + ff_expand_buffer[len++] = *wc_part++; + } + ff_expand_buffer[len] = NUL; + search_ctx->ffsc_wc_path = vim_strsave(ff_expand_buffer); + + if (search_ctx->ffsc_wc_path == NULL) + goto error_return; + } + else + search_ctx->ffsc_fix_path = vim_strsave(path); + + if (search_ctx->ffsc_start_dir == NULL) + { + // store the fix part as startdir. + // This is needed if the parameter path is fully qualified. + search_ctx->ffsc_start_dir = vim_strsave(search_ctx->ffsc_fix_path); + if (search_ctx->ffsc_start_dir == NULL) + goto error_return; + search_ctx->ffsc_fix_path[0] = NUL; + } + + // create an absolute path + if (STRLEN(search_ctx->ffsc_start_dir) + + STRLEN(search_ctx->ffsc_fix_path) + 3 >= MAXPATHL) + { + emsg(_(e_path_too_long_for_completion)); + goto error_return; + } + STRCPY(ff_expand_buffer, search_ctx->ffsc_start_dir); + add_pathsep(ff_expand_buffer); + { + int eb_len = (int)STRLEN(ff_expand_buffer); + char_u *buf = alloc(eb_len + + (int)STRLEN(search_ctx->ffsc_fix_path) + 1); + + STRCPY(buf, ff_expand_buffer); + STRCPY(buf + eb_len, search_ctx->ffsc_fix_path); + if (mch_isdir(buf)) + { + STRCAT(ff_expand_buffer, search_ctx->ffsc_fix_path); + add_pathsep(ff_expand_buffer); + } + else + { + char_u *p = gettail(search_ctx->ffsc_fix_path); + char_u *wc_path = NULL; + char_u *temp = NULL; + int len = 0; + + if (p > search_ctx->ffsc_fix_path) + { + // do not add '..' to the path and start upwards searching + len = (int)(p - search_ctx->ffsc_fix_path) - 1; + if ((len >= 2 + && STRNCMP(search_ctx->ffsc_fix_path, "..", 2) == 0) + && (len == 2 + || search_ctx->ffsc_fix_path[2] == PATHSEP)) + { + vim_free(buf); + goto error_return; + } + STRNCAT(ff_expand_buffer, search_ctx->ffsc_fix_path, len); + add_pathsep(ff_expand_buffer); + } + else + len = (int)STRLEN(search_ctx->ffsc_fix_path); + + if (search_ctx->ffsc_wc_path != NULL) + { + wc_path = vim_strsave(search_ctx->ffsc_wc_path); + temp = alloc(STRLEN(search_ctx->ffsc_wc_path) + + STRLEN(search_ctx->ffsc_fix_path + len) + + 1); + if (temp == NULL || wc_path == NULL) + { + vim_free(buf); + vim_free(temp); + vim_free(wc_path); + goto error_return; + } + + STRCPY(temp, search_ctx->ffsc_fix_path + len); + STRCAT(temp, search_ctx->ffsc_wc_path); + vim_free(search_ctx->ffsc_wc_path); + vim_free(wc_path); + search_ctx->ffsc_wc_path = temp; + } + } + vim_free(buf); + } + + sptr = ff_create_stack_element(ff_expand_buffer, + search_ctx->ffsc_wc_path, level, 0); + + if (sptr == NULL) + goto error_return; + + ff_push(search_ctx, sptr); + + search_ctx->ffsc_file_to_search = vim_strsave(filename); + if (search_ctx->ffsc_file_to_search == NULL) + goto error_return; + + return search_ctx; + +error_return: + /* + * We clear the search context now! + * Even when the caller gave us a (perhaps valid) context we free it here, + * as we might have already destroyed it. + */ + vim_findfile_cleanup(search_ctx); + return NULL; +} + +/* + * Get the stopdir string. Check that ';' is not escaped. + */ + char_u * +vim_findfile_stopdir(char_u *buf) +{ + char_u *r_ptr = buf; + + while (*r_ptr != NUL && *r_ptr != ';') + { + if (r_ptr[0] == '\\' && r_ptr[1] == ';') + { + // Overwrite the escape char, + // use STRLEN(r_ptr) to move the trailing '\0'. + STRMOVE(r_ptr, r_ptr + 1); + r_ptr++; + } + r_ptr++; + } + if (*r_ptr == ';') + { + *r_ptr = 0; + r_ptr++; + } + else if (*r_ptr == NUL) + r_ptr = NULL; + return r_ptr; +} + +/* + * Clean up the given search context. Can handle a NULL pointer. + */ + void +vim_findfile_cleanup(void *ctx) +{ + if (ctx == NULL) + return; + + vim_findfile_free_visited(ctx); + ff_clear(ctx); + vim_free(ctx); +} + +/* + * Find a file in a search context. + * The search context was created with vim_findfile_init() above. + * Return a pointer to an allocated file name or NULL if nothing found. + * To get all matching files call this function until you get NULL. + * + * If the passed search_context is NULL, NULL is returned. + * + * The search algorithm is depth first. To change this replace the + * stack with a list (don't forget to leave partly searched directories on the + * top of the list). + */ + char_u * +vim_findfile(void *search_ctx_arg) +{ + char_u *file_path; + char_u *rest_of_wildcards; + char_u *path_end = NULL; + ff_stack_T *stackp; + int len; + int i; + char_u *p; + char_u *suf; + ff_search_ctx_T *search_ctx; + + if (search_ctx_arg == NULL) + return NULL; + + search_ctx = (ff_search_ctx_T *)search_ctx_arg; + + /* + * filepath is used as buffer for various actions and as the storage to + * return a found filename. + */ + if ((file_path = alloc(MAXPATHL)) == NULL) + return NULL; + + // store the end of the start dir -- needed for upward search + if (search_ctx->ffsc_start_dir != NULL) + path_end = &search_ctx->ffsc_start_dir[ + STRLEN(search_ctx->ffsc_start_dir)]; + + // upward search loop + for (;;) + { + // downward search loop + for (;;) + { + // check if user wants to stop the search + ui_breakcheck(); + if (got_int) + break; + + // get directory to work on from stack + stackp = ff_pop(search_ctx); + if (stackp == NULL) + break; + + /* + * TODO: decide if we leave this test in + * + * GOOD: don't search a directory(-tree) twice. + * BAD: - check linked list for every new directory entered. + * - check for double files also done below + * + * Here we check if we already searched this directory. + * We already searched a directory if: + * 1) The directory is the same. + * 2) We would use the same wildcard string. + * + * Good if you have links on same directory via several ways + * or you have selfreferences in directories (e.g. SuSE Linux 6.3: + * /etc/rc.d/init.d is linked to /etc/rc.d -> endless loop) + * + * This check is only needed for directories we work on for the + * first time (hence stackp->ff_filearray == NULL) + */ + if (stackp->ffs_filearray == NULL + && ff_check_visited(&search_ctx->ffsc_dir_visited_list + ->ffvl_visited_list, + stackp->ffs_fix_path, stackp->ffs_wc_path) == FAIL) + { +#ifdef FF_VERBOSE + if (p_verbose >= 5) + { + verbose_enter_scroll(); + smsg("Already Searched: %s (%s)", + stackp->ffs_fix_path, stackp->ffs_wc_path); + // don't overwrite this either + msg_puts("\n"); + verbose_leave_scroll(); + } +#endif + ff_free_stack_element(stackp); + continue; + } +#ifdef FF_VERBOSE + else if (p_verbose >= 5) + { + verbose_enter_scroll(); + smsg("Searching: %s (%s)", + stackp->ffs_fix_path, stackp->ffs_wc_path); + // don't overwrite this either + msg_puts("\n"); + verbose_leave_scroll(); + } +#endif + + // check depth + if (stackp->ffs_level <= 0) + { + ff_free_stack_element(stackp); + continue; + } + + file_path[0] = NUL; + + /* + * If no filearray till now expand wildcards + * The function expand_wildcards() can handle an array of paths + * and all possible expands are returned in one array. We use this + * to handle the expansion of '**' into an empty string. + */ + if (stackp->ffs_filearray == NULL) + { + char_u *dirptrs[2]; + + // we use filepath to build the path expand_wildcards() should + // expand. + dirptrs[0] = file_path; + dirptrs[1] = NULL; + + // if we have a start dir copy it in + if (!vim_isAbsName(stackp->ffs_fix_path) + && search_ctx->ffsc_start_dir) + { + if (STRLEN(search_ctx->ffsc_start_dir) + 1 < MAXPATHL) + { + STRCPY(file_path, search_ctx->ffsc_start_dir); + add_pathsep(file_path); + } + else + { + ff_free_stack_element(stackp); + goto fail; + } + } + + // append the fix part of the search path + if (STRLEN(file_path) + STRLEN(stackp->ffs_fix_path) + 1 + < MAXPATHL) + { + STRCAT(file_path, stackp->ffs_fix_path); + add_pathsep(file_path); + } + else + { + ff_free_stack_element(stackp); + goto fail; + } + + rest_of_wildcards = stackp->ffs_wc_path; + if (*rest_of_wildcards != NUL) + { + len = (int)STRLEN(file_path); + if (STRNCMP(rest_of_wildcards, "**", 2) == 0) + { + // pointer to the restrict byte + // The restrict byte is not a character! + p = rest_of_wildcards + 2; + + if (*p > 0) + { + (*p)--; + if (len + 1 < MAXPATHL) + file_path[len++] = '*'; + else + { + ff_free_stack_element(stackp); + goto fail; + } + } + + if (*p == 0) + { + // remove '**<numb> from wildcards + STRMOVE(rest_of_wildcards, rest_of_wildcards + 3); + } + else + rest_of_wildcards += 3; + + if (stackp->ffs_star_star_empty == 0) + { + // if not done before, expand '**' to empty + stackp->ffs_star_star_empty = 1; + dirptrs[1] = stackp->ffs_fix_path; + } + } + + /* + * Here we copy until the next path separator or the end of + * the path. If we stop at a path separator, there is + * still something else left. This is handled below by + * pushing every directory returned from expand_wildcards() + * on the stack again for further search. + */ + while (*rest_of_wildcards + && !vim_ispathsep(*rest_of_wildcards)) + if (len + 1 < MAXPATHL) + file_path[len++] = *rest_of_wildcards++; + else + { + ff_free_stack_element(stackp); + goto fail; + } + + file_path[len] = NUL; + if (vim_ispathsep(*rest_of_wildcards)) + rest_of_wildcards++; + } + + /* + * Expand wildcards like "*" and "$VAR". + * If the path is a URL don't try this. + */ + if (path_with_url(dirptrs[0])) + { + stackp->ffs_filearray = ALLOC_ONE(char_u *); + if (stackp->ffs_filearray != NULL + && (stackp->ffs_filearray[0] + = vim_strsave(dirptrs[0])) != NULL) + stackp->ffs_filearray_size = 1; + else + stackp->ffs_filearray_size = 0; + } + else + // Add EW_NOTWILD because the expanded path may contain + // wildcard characters that are to be taken literally. + // This is a bit of a hack. + expand_wildcards((dirptrs[1] == NULL) ? 1 : 2, dirptrs, + &stackp->ffs_filearray_size, + &stackp->ffs_filearray, + EW_DIR|EW_ADDSLASH|EW_SILENT|EW_NOTWILD); + + stackp->ffs_filearray_cur = 0; + stackp->ffs_stage = 0; + } + else + rest_of_wildcards = &stackp->ffs_wc_path[ + STRLEN(stackp->ffs_wc_path)]; + + if (stackp->ffs_stage == 0) + { + // this is the first time we work on this directory + if (*rest_of_wildcards == NUL) + { + /* + * We don't have further wildcards to expand, so we have to + * check for the final file now. + */ + for (i = stackp->ffs_filearray_cur; + i < stackp->ffs_filearray_size; ++i) + { + if (!path_with_url(stackp->ffs_filearray[i]) + && !mch_isdir(stackp->ffs_filearray[i])) + continue; // not a directory + + // prepare the filename to be checked for existence + // below + if (STRLEN(stackp->ffs_filearray[i]) + 1 + + STRLEN(search_ctx->ffsc_file_to_search) + < MAXPATHL) + { + STRCPY(file_path, stackp->ffs_filearray[i]); + add_pathsep(file_path); + STRCAT(file_path, search_ctx->ffsc_file_to_search); + } + else + { + ff_free_stack_element(stackp); + goto fail; + } + + /* + * Try without extra suffix and then with suffixes + * from 'suffixesadd'. + */ + len = (int)STRLEN(file_path); + if (search_ctx->ffsc_tagfile) + suf = (char_u *)""; + else + suf = curbuf->b_p_sua; + for (;;) + { + // if file exists and we didn't already find it + if ((path_with_url(file_path) + || (mch_getperm(file_path) >= 0 + && (search_ctx->ffsc_find_what + == FINDFILE_BOTH + || ((search_ctx->ffsc_find_what + == FINDFILE_DIR) + == mch_isdir(file_path))))) +#ifndef FF_VERBOSE + && (ff_check_visited( + &search_ctx->ffsc_visited_list + ->ffvl_visited_list, + file_path, (char_u *)"") == OK) +#endif + ) + { +#ifdef FF_VERBOSE + if (ff_check_visited( + &search_ctx->ffsc_visited_list + ->ffvl_visited_list, + file_path, (char_u *)"") == FAIL) + { + if (p_verbose >= 5) + { + verbose_enter_scroll(); + smsg("Already: %s", + file_path); + // don't overwrite this either + msg_puts("\n"); + verbose_leave_scroll(); + } + continue; + } +#endif + + // push dir to examine rest of subdirs later + stackp->ffs_filearray_cur = i + 1; + ff_push(search_ctx, stackp); + + if (!path_with_url(file_path)) + simplify_filename(file_path); + if (mch_dirname(ff_expand_buffer, MAXPATHL) + == OK) + { + p = shorten_fname(file_path, + ff_expand_buffer); + if (p != NULL) + STRMOVE(file_path, p); + } +#ifdef FF_VERBOSE + if (p_verbose >= 5) + { + verbose_enter_scroll(); + smsg("HIT: %s", file_path); + // don't overwrite this either + msg_puts("\n"); + verbose_leave_scroll(); + } +#endif + return file_path; + } + + // Not found or found already, try next suffix. + if (*suf == NUL) + break; + copy_option_part(&suf, file_path + len, + MAXPATHL - len, ","); + } + } + } + else + { + /* + * still wildcards left, push the directories for further + * search + */ + for (i = stackp->ffs_filearray_cur; + i < stackp->ffs_filearray_size; ++i) + { + if (!mch_isdir(stackp->ffs_filearray[i])) + continue; // not a directory + + ff_push(search_ctx, + ff_create_stack_element( + stackp->ffs_filearray[i], + rest_of_wildcards, + stackp->ffs_level - 1, 0)); + } + } + stackp->ffs_filearray_cur = 0; + stackp->ffs_stage = 1; + } + + /* + * if wildcards contains '**' we have to descent till we reach the + * leaves of the directory tree. + */ + if (STRNCMP(stackp->ffs_wc_path, "**", 2) == 0) + { + for (i = stackp->ffs_filearray_cur; + i < stackp->ffs_filearray_size; ++i) + { + if (fnamecmp(stackp->ffs_filearray[i], + stackp->ffs_fix_path) == 0) + continue; // don't repush same directory + if (!mch_isdir(stackp->ffs_filearray[i])) + continue; // not a directory + ff_push(search_ctx, + ff_create_stack_element(stackp->ffs_filearray[i], + stackp->ffs_wc_path, stackp->ffs_level - 1, 1)); + } + } + + // we are done with the current directory + ff_free_stack_element(stackp); + + } + + // If we reached this, we didn't find anything downwards. + // Let's check if we should do an upward search. + if (search_ctx->ffsc_start_dir + && search_ctx->ffsc_stopdirs_v != NULL && !got_int) + { + ff_stack_T *sptr; + + // is the last starting directory in the stop list? + if (ff_path_in_stoplist(search_ctx->ffsc_start_dir, + (int)(path_end - search_ctx->ffsc_start_dir), + search_ctx->ffsc_stopdirs_v) == TRUE) + break; + + // cut of last dir + while (path_end > search_ctx->ffsc_start_dir + && vim_ispathsep(*path_end)) + path_end--; + while (path_end > search_ctx->ffsc_start_dir + && !vim_ispathsep(path_end[-1])) + path_end--; + *path_end = 0; + path_end--; + + if (*search_ctx->ffsc_start_dir == 0) + break; + + if (STRLEN(search_ctx->ffsc_start_dir) + 1 + + STRLEN(search_ctx->ffsc_fix_path) < MAXPATHL) + { + STRCPY(file_path, search_ctx->ffsc_start_dir); + add_pathsep(file_path); + STRCAT(file_path, search_ctx->ffsc_fix_path); + } + else + goto fail; + + // create a new stack entry + sptr = ff_create_stack_element(file_path, + search_ctx->ffsc_wc_path, search_ctx->ffsc_level, 0); + if (sptr == NULL) + break; + ff_push(search_ctx, sptr); + } + else + break; + } + +fail: + vim_free(file_path); + return NULL; +} + +/* + * Free the list of lists of visited files and directories + * Can handle it if the passed search_context is NULL; + */ + static void +vim_findfile_free_visited(void *search_ctx_arg) +{ + ff_search_ctx_T *search_ctx; + + if (search_ctx_arg == NULL) + return; + + search_ctx = (ff_search_ctx_T *)search_ctx_arg; + vim_findfile_free_visited_list(&search_ctx->ffsc_visited_lists_list); + vim_findfile_free_visited_list(&search_ctx->ffsc_dir_visited_lists_list); +} + + static void +vim_findfile_free_visited_list(ff_visited_list_hdr_T **list_headp) +{ + ff_visited_list_hdr_T *vp; + + while (*list_headp != NULL) + { + vp = (*list_headp)->ffvl_next; + ff_free_visited_list((*list_headp)->ffvl_visited_list); + + vim_free((*list_headp)->ffvl_filename); + vim_free(*list_headp); + *list_headp = vp; + } + *list_headp = NULL; +} + + static void +ff_free_visited_list(ff_visited_T *vl) +{ + ff_visited_T *vp; + + while (vl != NULL) + { + vp = vl->ffv_next; + vim_free(vl->ffv_wc_path); + vim_free(vl); + vl = vp; + } + vl = NULL; +} + +/* + * Returns the already visited list for the given filename. If none is found it + * allocates a new one. + */ + static ff_visited_list_hdr_T* +ff_get_visited_list( + char_u *filename, + ff_visited_list_hdr_T **list_headp) +{ + ff_visited_list_hdr_T *retptr = NULL; + + // check if a visited list for the given filename exists + if (*list_headp != NULL) + { + retptr = *list_headp; + while (retptr != NULL) + { + if (fnamecmp(filename, retptr->ffvl_filename) == 0) + { +#ifdef FF_VERBOSE + if (p_verbose >= 5) + { + verbose_enter_scroll(); + smsg("ff_get_visited_list: FOUND list for %s", + filename); + // don't overwrite this either + msg_puts("\n"); + verbose_leave_scroll(); + } +#endif + return retptr; + } + retptr = retptr->ffvl_next; + } + } + +#ifdef FF_VERBOSE + if (p_verbose >= 5) + { + verbose_enter_scroll(); + smsg("ff_get_visited_list: new list for %s", filename); + // don't overwrite this either + msg_puts("\n"); + verbose_leave_scroll(); + } +#endif + + /* + * if we reach this we didn't find a list and we have to allocate new list + */ + retptr = ALLOC_ONE(ff_visited_list_hdr_T); + if (retptr == NULL) + return NULL; + + retptr->ffvl_visited_list = NULL; + retptr->ffvl_filename = vim_strsave(filename); + if (retptr->ffvl_filename == NULL) + { + vim_free(retptr); + return NULL; + } + retptr->ffvl_next = *list_headp; + *list_headp = retptr; + + return retptr; +} + +/* + * check if two wildcard paths are equal. Returns TRUE or FALSE. + * They are equal if: + * - both paths are NULL + * - they have the same length + * - char by char comparison is OK + * - the only differences are in the counters behind a '**', so + * '**\20' is equal to '**\24' + */ + static int +ff_wc_equal(char_u *s1, char_u *s2) +{ + int i, j; + int c1 = NUL; + int c2 = NUL; + int prev1 = NUL; + int prev2 = NUL; + + if (s1 == s2) + return TRUE; + + if (s1 == NULL || s2 == NULL) + return FALSE; + + for (i = 0, j = 0; s1[i] != NUL && s2[j] != NUL;) + { + c1 = PTR2CHAR(s1 + i); + c2 = PTR2CHAR(s2 + j); + + if ((p_fic ? MB_TOLOWER(c1) != MB_TOLOWER(c2) : c1 != c2) + && (prev1 != '*' || prev2 != '*')) + return FALSE; + prev2 = prev1; + prev1 = c1; + + i += mb_ptr2len(s1 + i); + j += mb_ptr2len(s2 + j); + } + return s1[i] == s2[j]; +} + +/* + * maintains the list of already visited files and dirs + * returns FAIL if the given file/dir is already in the list + * returns OK if it is newly added + * + * TODO: What to do on memory allocation problems? + * -> return TRUE - Better the file is found several times instead of + * never. + */ + static int +ff_check_visited( + ff_visited_T **visited_list, + char_u *fname, + char_u *wc_path) +{ + ff_visited_T *vp; +#ifdef UNIX + stat_T st; + int url = FALSE; +#endif + + // For a URL we only compare the name, otherwise we compare the + // device/inode (unix) or the full path name (not Unix). + if (path_with_url(fname)) + { + vim_strncpy(ff_expand_buffer, fname, MAXPATHL - 1); +#ifdef UNIX + url = TRUE; +#endif + } + else + { + ff_expand_buffer[0] = NUL; +#ifdef UNIX + if (mch_stat((char *)fname, &st) < 0) +#else + if (vim_FullName(fname, ff_expand_buffer, MAXPATHL, TRUE) == FAIL) +#endif + return FAIL; + } + + // check against list of already visited files + for (vp = *visited_list; vp != NULL; vp = vp->ffv_next) + { + if ( +#ifdef UNIX + !url ? (vp->ffv_dev_valid && vp->ffv_dev == st.st_dev + && vp->ffv_ino == st.st_ino) + : +#endif + fnamecmp(vp->ffv_fname, ff_expand_buffer) == 0 + ) + { + // are the wildcard parts equal + if (ff_wc_equal(vp->ffv_wc_path, wc_path) == TRUE) + // already visited + return FAIL; + } + } + + /* + * New file/dir. Add it to the list of visited files/dirs. + */ + vp = alloc( + offsetof(ff_visited_T, ffv_fname) + STRLEN(ff_expand_buffer) + 1); + if (vp == NULL) + return OK; + +#ifdef UNIX + if (!url) + { + vp->ffv_dev_valid = TRUE; + vp->ffv_ino = st.st_ino; + vp->ffv_dev = st.st_dev; + vp->ffv_fname[0] = NUL; + } + else + { + vp->ffv_dev_valid = FALSE; +#endif + STRCPY(vp->ffv_fname, ff_expand_buffer); +#ifdef UNIX + } +#endif + if (wc_path != NULL) + vp->ffv_wc_path = vim_strsave(wc_path); + else + vp->ffv_wc_path = NULL; + + vp->ffv_next = *visited_list; + *visited_list = vp; + + return OK; +} + +/* + * create stack element from given path pieces + */ + static ff_stack_T * +ff_create_stack_element( + char_u *fix_part, + char_u *wc_part, + int level, + int star_star_empty) +{ + ff_stack_T *new; + + new = ALLOC_ONE(ff_stack_T); + if (new == NULL) + return NULL; + + new->ffs_prev = NULL; + new->ffs_filearray = NULL; + new->ffs_filearray_size = 0; + new->ffs_filearray_cur = 0; + new->ffs_stage = 0; + new->ffs_level = level; + new->ffs_star_star_empty = star_star_empty; + + // the following saves NULL pointer checks in vim_findfile + if (fix_part == NULL) + fix_part = (char_u *)""; + new->ffs_fix_path = vim_strsave(fix_part); + + if (wc_part == NULL) + wc_part = (char_u *)""; + new->ffs_wc_path = vim_strsave(wc_part); + + if (new->ffs_fix_path == NULL || new->ffs_wc_path == NULL) + { + ff_free_stack_element(new); + new = NULL; + } + + return new; +} + +/* + * Push a dir on the directory stack. + */ + static void +ff_push(ff_search_ctx_T *search_ctx, ff_stack_T *stack_ptr) +{ + // check for NULL pointer, not to return an error to the user, but + // to prevent a crash + if (stack_ptr == NULL) + return; + + stack_ptr->ffs_prev = search_ctx->ffsc_stack_ptr; + search_ctx->ffsc_stack_ptr = stack_ptr; +} + +/* + * Pop a dir from the directory stack. + * Returns NULL if stack is empty. + */ + static ff_stack_T * +ff_pop(ff_search_ctx_T *search_ctx) +{ + ff_stack_T *sptr; + + sptr = search_ctx->ffsc_stack_ptr; + if (search_ctx->ffsc_stack_ptr != NULL) + search_ctx->ffsc_stack_ptr = search_ctx->ffsc_stack_ptr->ffs_prev; + + return sptr; +} + +/* + * free the given stack element + */ + static void +ff_free_stack_element(ff_stack_T *stack_ptr) +{ + // vim_free handles possible NULL pointers + vim_free(stack_ptr->ffs_fix_path); + vim_free(stack_ptr->ffs_wc_path); + + if (stack_ptr->ffs_filearray != NULL) + FreeWild(stack_ptr->ffs_filearray_size, stack_ptr->ffs_filearray); + + vim_free(stack_ptr); +} + +/* + * Clear the search context, but NOT the visited list. + */ + static void +ff_clear(ff_search_ctx_T *search_ctx) +{ + ff_stack_T *sptr; + + // clear up stack + while ((sptr = ff_pop(search_ctx)) != NULL) + ff_free_stack_element(sptr); + + vim_free(search_ctx->ffsc_file_to_search); + vim_free(search_ctx->ffsc_start_dir); + vim_free(search_ctx->ffsc_fix_path); + vim_free(search_ctx->ffsc_wc_path); + + if (search_ctx->ffsc_stopdirs_v != NULL) + { + int i = 0; + + while (search_ctx->ffsc_stopdirs_v[i] != NULL) + { + vim_free(search_ctx->ffsc_stopdirs_v[i]); + i++; + } + vim_free(search_ctx->ffsc_stopdirs_v); + } + search_ctx->ffsc_stopdirs_v = NULL; + + // reset everything + search_ctx->ffsc_file_to_search = NULL; + search_ctx->ffsc_start_dir = NULL; + search_ctx->ffsc_fix_path = NULL; + search_ctx->ffsc_wc_path = NULL; + search_ctx->ffsc_level = 0; +} + +/* + * check if the given path is in the stopdirs + * returns TRUE if yes else FALSE + */ + static int +ff_path_in_stoplist(char_u *path, int path_len, char_u **stopdirs_v) +{ + int i = 0; + + // eat up trailing path separators, except the first + while (path_len > 1 && vim_ispathsep(path[path_len - 1])) + path_len--; + + // if no path consider it as match + if (path_len == 0) + return TRUE; + + for (i = 0; stopdirs_v[i] != NULL; i++) + { + if ((int)STRLEN(stopdirs_v[i]) > path_len) + { + // match for parent directory. So '/home' also matches + // '/home/rks'. Check for PATHSEP in stopdirs_v[i], else + // '/home/r' would also match '/home/rks' + if (fnamencmp(stopdirs_v[i], path, path_len) == 0 + && vim_ispathsep(stopdirs_v[i][path_len])) + return TRUE; + } + else + { + if (fnamecmp(stopdirs_v[i], path) == 0) + return TRUE; + } + } + return FALSE; +} + +/* + * Find the file name "ptr[len]" in the path. Also finds directory names. + * + * On the first call set the parameter 'first' to TRUE to initialize + * the search. For repeating calls to FALSE. + * + * Repeating calls will return other files called 'ptr[len]' from the path. + * + * Only on the first call 'ptr' and 'len' are used. For repeating calls they + * don't need valid values. + * + * If nothing found on the first call the option FNAME_MESS will issue the + * message: + * 'Can't find file "<file>" in path' + * On repeating calls: + * 'No more file "<file>" found in path' + * + * options: + * FNAME_MESS give error message when not found + * + * Uses NameBuff[]! + * + * Returns an allocated string for the file name. NULL for error. + * + */ + char_u * +find_file_in_path( + char_u *ptr, // file name + int len, // length of file name + int options, + int first, // use count'th matching file name + char_u *rel_fname) // file name searching relative to +{ + return find_file_in_path_option(ptr, len, options, first, + *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path, + FINDFILE_BOTH, rel_fname, curbuf->b_p_sua); +} + +static char_u *ff_file_to_find = NULL; +static void *fdip_search_ctx = NULL; + +# if defined(EXITFREE) || defined(PROTO) + void +free_findfile(void) +{ + vim_free(ff_file_to_find); + vim_findfile_cleanup(fdip_search_ctx); + vim_free(ff_expand_buffer); +} +# endif + +/* + * Find the directory name "ptr[len]" in the path. + * + * options: + * FNAME_MESS give error message when not found + * FNAME_UNESC unescape backslashes. + * + * Uses NameBuff[]! + * + * Returns an allocated string for the file name. NULL for error. + */ + char_u * +find_directory_in_path( + char_u *ptr, // file name + int len, // length of file name + int options, + char_u *rel_fname) // file name searching relative to +{ + return find_file_in_path_option(ptr, len, options, TRUE, p_cdpath, + FINDFILE_DIR, rel_fname, (char_u *)""); +} + + char_u * +find_file_in_path_option( + char_u *ptr, // file name + int len, // length of file name + int options, + int first, // use count'th matching file name + char_u *path_option, // p_path or p_cdpath + int find_what, // FINDFILE_FILE, _DIR or _BOTH + char_u *rel_fname, // file name we are looking relative to. + char_u *suffixes) // list of suffixes, 'suffixesadd' option +{ + static char_u *dir; + static int did_findfile_init = FALSE; + char_u save_char; + char_u *file_name = NULL; + char_u *buf = NULL; + int rel_to_curdir; +# ifdef AMIGA + struct Process *proc = (struct Process *)FindTask(0L); + APTR save_winptr = proc->pr_WindowPtr; + + // Avoid a requester here for a volume that doesn't exist. + proc->pr_WindowPtr = (APTR)-1L; +# endif + + if (first == TRUE) + { + if (len == 0) + return NULL; + + // copy file name into NameBuff, expanding environment variables + save_char = ptr[len]; + ptr[len] = NUL; + expand_env_esc(ptr, NameBuff, MAXPATHL, FALSE, TRUE, NULL); + ptr[len] = save_char; + + vim_free(ff_file_to_find); + ff_file_to_find = vim_strsave(NameBuff); + if (ff_file_to_find == NULL) // out of memory + { + file_name = NULL; + goto theend; + } + if (options & FNAME_UNESC) + { + // Change all "\ " to " ". + for (ptr = ff_file_to_find; *ptr != NUL; ++ptr) + if (ptr[0] == '\\' && ptr[1] == ' ') + mch_memmove(ptr, ptr + 1, STRLEN(ptr)); + } + } + + rel_to_curdir = (ff_file_to_find[0] == '.' + && (ff_file_to_find[1] == NUL + || vim_ispathsep(ff_file_to_find[1]) + || (ff_file_to_find[1] == '.' + && (ff_file_to_find[2] == NUL + || vim_ispathsep(ff_file_to_find[2]))))); + if (vim_isAbsName(ff_file_to_find) + // "..", "../path", "." and "./path": don't use the path_option + || rel_to_curdir +# if defined(MSWIN) + // handle "\tmp" as absolute path + || vim_ispathsep(ff_file_to_find[0]) + // handle "c:name" as absolute path + || (ff_file_to_find[0] != NUL && ff_file_to_find[1] == ':') +# endif +# ifdef AMIGA + // handle ":tmp" as absolute path + || ff_file_to_find[0] == ':' +# endif + ) + { + /* + * Absolute path, no need to use "path_option". + * If this is not a first call, return NULL. We already returned a + * filename on the first call. + */ + if (first == TRUE) + { + int l; + int run; + + if (path_with_url(ff_file_to_find)) + { + file_name = vim_strsave(ff_file_to_find); + goto theend; + } + + // When FNAME_REL flag given first use the directory of the file. + // Otherwise or when this fails use the current directory. + for (run = 1; run <= 2; ++run) + { + l = (int)STRLEN(ff_file_to_find); + if (run == 1 + && rel_to_curdir + && (options & FNAME_REL) + && rel_fname != NULL + && STRLEN(rel_fname) + l < MAXPATHL) + { + STRCPY(NameBuff, rel_fname); + STRCPY(gettail(NameBuff), ff_file_to_find); + l = (int)STRLEN(NameBuff); + } + else + { + STRCPY(NameBuff, ff_file_to_find); + run = 2; + } + + // When the file doesn't exist, try adding parts of + // 'suffixesadd'. + buf = suffixes; + for (;;) + { + if (mch_getperm(NameBuff) >= 0 + && (find_what == FINDFILE_BOTH + || ((find_what == FINDFILE_DIR) + == mch_isdir(NameBuff)))) + { + file_name = vim_strsave(NameBuff); + goto theend; + } + if (*buf == NUL) + break; + copy_option_part(&buf, NameBuff + l, MAXPATHL - l, ","); + } + } + } + } + else + { + /* + * Loop over all paths in the 'path' or 'cdpath' option. + * When "first" is set, first setup to the start of the option. + * Otherwise continue to find the next match. + */ + if (first == TRUE) + { + // vim_findfile_free_visited can handle a possible NULL pointer + vim_findfile_free_visited(fdip_search_ctx); + dir = path_option; + did_findfile_init = FALSE; + } + + for (;;) + { + if (did_findfile_init) + { + file_name = vim_findfile(fdip_search_ctx); + if (file_name != NULL) + break; + + did_findfile_init = FALSE; + } + else + { + char_u *r_ptr; + + if (dir == NULL || *dir == NUL) + { + // We searched all paths of the option, now we can + // free the search context. + vim_findfile_cleanup(fdip_search_ctx); + fdip_search_ctx = NULL; + break; + } + + if ((buf = alloc(MAXPATHL)) == NULL) + break; + + // copy next path + buf[0] = 0; + copy_option_part(&dir, buf, MAXPATHL, " ,"); + + // get the stopdir string + r_ptr = vim_findfile_stopdir(buf); + fdip_search_ctx = vim_findfile_init(buf, ff_file_to_find, + r_ptr, 100, FALSE, find_what, + fdip_search_ctx, FALSE, rel_fname); + if (fdip_search_ctx != NULL) + did_findfile_init = TRUE; + vim_free(buf); + } + } + } + if (file_name == NULL && (options & FNAME_MESS)) + { + if (first == TRUE) + { + if (find_what == FINDFILE_DIR) + semsg(_(e_cant_find_directory_str_in_cdpath), + ff_file_to_find); + else + semsg(_(e_cant_find_file_str_in_path), + ff_file_to_find); + } + else + { + if (find_what == FINDFILE_DIR) + semsg(_(e_no_more_directory_str_found_in_cdpath), + ff_file_to_find); + else + semsg(_(e_no_more_file_str_found_in_path), + ff_file_to_find); + } + } + +theend: +# ifdef AMIGA + proc->pr_WindowPtr = save_winptr; +# endif + return file_name; +} + +/* + * Get the file name at the cursor. + * If Visual mode is active, use the selected text if it's in one line. + * Returns the name in allocated memory, NULL for failure. + */ + char_u * +grab_file_name(long count, linenr_T *file_lnum) +{ + int options = FNAME_MESS|FNAME_EXP|FNAME_REL|FNAME_UNESC; + + if (VIsual_active) + { + int len; + char_u *ptr; + + if (get_visual_text(NULL, &ptr, &len) == FAIL) + return NULL; + // Only recognize ":123" here + if (file_lnum != NULL && ptr[len] == ':' && isdigit(ptr[len + 1])) + { + char_u *p = ptr + len + 1; + + *file_lnum = getdigits(&p); + } + return find_file_name_in_path(ptr, len, options, + count, curbuf->b_ffname); + } + return file_name_at_cursor(options | FNAME_HYP, count, file_lnum); +} + +/* + * Return the file name under or after the cursor. + * + * The 'path' option is searched if the file name is not absolute. + * The string returned has been alloc'ed and should be freed by the caller. + * NULL is returned if the file name or file is not found. + * + * options: + * FNAME_MESS give error messages + * FNAME_EXP expand to path + * FNAME_HYP check for hypertext link + * FNAME_INCL apply "includeexpr" + */ + char_u * +file_name_at_cursor(int options, long count, linenr_T *file_lnum) +{ + return file_name_in_line(ml_get_curline(), + curwin->w_cursor.col, options, count, curbuf->b_ffname, + file_lnum); +} + +/* + * Return the name of the file under or after ptr[col]. + * Otherwise like file_name_at_cursor(). + */ + char_u * +file_name_in_line( + char_u *line, + int col, + int options, + long count, + char_u *rel_fname, // file we are searching relative to + linenr_T *file_lnum) // line number after the file name +{ + char_u *ptr; + int len; + int in_type = TRUE; + int is_url = FALSE; + + /* + * search forward for what could be the start of a file name + */ + ptr = line + col; + while (*ptr != NUL && !vim_isfilec(*ptr)) + MB_PTR_ADV(ptr); + if (*ptr == NUL) // nothing found + { + if (options & FNAME_MESS) + emsg(_(e_no_file_name_under_cursor)); + return NULL; + } + + /* + * Search backward for first char of the file name. + * Go one char back to ":" before "//" even when ':' is not in 'isfname'. + */ + while (ptr > line) + { + if (has_mbyte && (len = (*mb_head_off)(line, ptr - 1)) > 0) + ptr -= len + 1; + else if (vim_isfilec(ptr[-1]) + || ((options & FNAME_HYP) && path_is_url(ptr - 1))) + --ptr; + else + break; + } + + /* + * Search forward for the last char of the file name. + * Also allow "://" when ':' is not in 'isfname'. + */ + len = 0; + while (vim_isfilec(ptr[len]) || (ptr[len] == '\\' && ptr[len + 1] == ' ') + || ((options & FNAME_HYP) && path_is_url(ptr + len)) + || (is_url && vim_strchr((char_u *)":?&=", ptr[len]) != NULL)) + { + // After type:// we also include :, ?, & and = as valid characters, so + // that http://google.com:8080?q=this&that=ok works. + if ((ptr[len] >= 'A' && ptr[len] <= 'Z') + || (ptr[len] >= 'a' && ptr[len] <= 'z')) + { + if (in_type && path_is_url(ptr + len + 1)) + is_url = TRUE; + } + else + in_type = FALSE; + + if (ptr[len] == '\\') + // Skip over the "\" in "\ ". + ++len; + if (has_mbyte) + len += (*mb_ptr2len)(ptr + len); + else + ++len; + } + + /* + * If there is trailing punctuation, remove it. + * But don't remove "..", could be a directory name. + */ + if (len > 2 && vim_strchr((char_u *)".,:;!", ptr[len - 1]) != NULL + && ptr[len - 2] != '.') + --len; + + if (file_lnum != NULL) + { + char_u *p; + char *line_english = " line "; + char *line_transl = _(line_msg); + + // Get the number after the file name and a separator character. + // Also accept " line 999" with and without the same translation as + // used in last_set_msg(). + p = ptr + len; + if (STRNCMP(p, line_english, STRLEN(line_english)) == 0) + p += STRLEN(line_english); + else if (STRNCMP(p, line_transl, STRLEN(line_transl)) == 0) + p += STRLEN(line_transl); + else + p = skipwhite(p); + if (*p != NUL) + { + if (!isdigit(*p)) + ++p; // skip the separator + p = skipwhite(p); + if (isdigit(*p)) + *file_lnum = (int)getdigits(&p); + } + } + + return find_file_name_in_path(ptr, len, options, count, rel_fname); +} + +# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL) + static char_u * +eval_includeexpr(char_u *ptr, int len) +{ + char_u *res; + sctx_T save_sctx = current_sctx; + + set_vim_var_string(VV_FNAME, ptr, len); + current_sctx = curbuf->b_p_script_ctx[BV_INEX]; + + res = eval_to_string_safe(curbuf->b_p_inex, + was_set_insecurely((char_u *)"includeexpr", OPT_LOCAL), + TRUE, TRUE); + + set_vim_var_string(VV_FNAME, NULL, 0); + current_sctx = save_sctx; + return res; +} +# endif + +/* + * Return the name of the file ptr[len] in 'path'. + * Otherwise like file_name_at_cursor(). + */ + char_u * +find_file_name_in_path( + char_u *ptr, + int len, + int options, + long count, + char_u *rel_fname) // file we are searching relative to +{ + char_u *file_name; + int c; +# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL) + char_u *tofree = NULL; +# endif + + if (len == 0) + return NULL; + +# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL) + if ((options & FNAME_INCL) && *curbuf->b_p_inex != NUL) + { + tofree = eval_includeexpr(ptr, len); + if (tofree != NULL) + { + ptr = tofree; + len = (int)STRLEN(ptr); + } + } +# endif + + if (options & FNAME_EXP) + { + file_name = find_file_in_path(ptr, len, options & ~FNAME_MESS, + TRUE, rel_fname); + +# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL) + /* + * If the file could not be found in a normal way, try applying + * 'includeexpr' (unless done already). + */ + if (file_name == NULL + && !(options & FNAME_INCL) && *curbuf->b_p_inex != NUL) + { + tofree = eval_includeexpr(ptr, len); + if (tofree != NULL) + { + ptr = tofree; + len = (int)STRLEN(ptr); + file_name = find_file_in_path(ptr, len, options & ~FNAME_MESS, + TRUE, rel_fname); + } + } +# endif + if (file_name == NULL && (options & FNAME_MESS)) + { + c = ptr[len]; + ptr[len] = NUL; + semsg(_(e_cant_find_file_str_in_path_2), ptr); + ptr[len] = c; + } + + // Repeat finding the file "count" times. This matters when it + // appears several times in the path. + while (file_name != NULL && --count > 0) + { + vim_free(file_name); + file_name = find_file_in_path(ptr, len, options, FALSE, rel_fname); + } + } + else + file_name = vim_strnsave(ptr, len); + +# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL) + vim_free(tofree); +# endif + + return file_name; +} + +/* + * Return the end of the directory name, on the first path + * separator: + * "/path/file", "/path/dir/", "/path//dir", "/file" + * ^ ^ ^ ^ + */ + static char_u * +gettail_dir(char_u *fname) +{ + char_u *dir_end = fname; + char_u *next_dir_end = fname; + int look_for_sep = TRUE; + char_u *p; + + for (p = fname; *p != NUL; ) + { + if (vim_ispathsep(*p)) + { + if (look_for_sep) + { + next_dir_end = p; + look_for_sep = FALSE; + } + } + else + { + if (!look_for_sep) + dir_end = next_dir_end; + look_for_sep = TRUE; + } + MB_PTR_ADV(p); + } + return dir_end; +} + +/* + * return TRUE if 'c' is a path list separator. + */ + int +vim_ispathlistsep(int c) +{ +# ifdef UNIX + return (c == ':'); +# else + return (c == ';'); // might not be right for every system... +# endif +} + +/* + * Moves "*psep" back to the previous path separator in "path". + * Returns FAIL is "*psep" ends up at the beginning of "path". + */ + static int +find_previous_pathsep(char_u *path, char_u **psep) +{ + // skip the current separator + if (*psep > path && vim_ispathsep(**psep)) + --*psep; + + // find the previous separator + while (*psep > path) + { + if (vim_ispathsep(**psep)) + return OK; + MB_PTR_BACK(path, *psep); + } + + return FAIL; +} + +/* + * Returns TRUE if "maybe_unique" is unique wrt other_paths in "gap". + * "maybe_unique" is the end portion of "((char_u **)gap->ga_data)[i]". + */ + static int +is_unique(char_u *maybe_unique, garray_T *gap, int i) +{ + int j; + int candidate_len; + int other_path_len; + char_u **other_paths = (char_u **)gap->ga_data; + char_u *rival; + + for (j = 0; j < gap->ga_len; j++) + { + if (j == i) + continue; // don't compare it with itself + + candidate_len = (int)STRLEN(maybe_unique); + other_path_len = (int)STRLEN(other_paths[j]); + if (other_path_len < candidate_len) + continue; // it's different when it's shorter + + rival = other_paths[j] + other_path_len - candidate_len; + if (fnamecmp(maybe_unique, rival) == 0 + && (rival == other_paths[j] || vim_ispathsep(*(rival - 1)))) + return FALSE; // match + } + + return TRUE; // no match found +} + +/* + * Split the 'path' option into an array of strings in garray_T. Relative + * paths are expanded to their equivalent fullpath. This includes the "." + * (relative to current buffer directory) and empty path (relative to current + * directory) notations. + * + * TODO: handle upward search (;) and path limiter (**N) notations by + * expanding each into their equivalent path(s). + */ + static void +expand_path_option(char_u *curdir, garray_T *gap) +{ + char_u *path_option = *curbuf->b_p_path == NUL + ? p_path : curbuf->b_p_path; + char_u *buf; + char_u *p; + int len; + + if ((buf = alloc(MAXPATHL)) == NULL) + return; + + while (*path_option != NUL) + { + copy_option_part(&path_option, buf, MAXPATHL, " ,"); + + if (buf[0] == '.' && (buf[1] == NUL || vim_ispathsep(buf[1]))) + { + // Relative to current buffer: + // "/path/file" + "." -> "/path/" + // "/path/file" + "./subdir" -> "/path/subdir" + if (curbuf->b_ffname == NULL) + continue; + p = gettail(curbuf->b_ffname); + len = (int)(p - curbuf->b_ffname); + if (len + (int)STRLEN(buf) >= MAXPATHL) + continue; + if (buf[1] == NUL) + buf[len] = NUL; + else + STRMOVE(buf + len, buf + 2); + mch_memmove(buf, curbuf->b_ffname, len); + simplify_filename(buf); + } + else if (buf[0] == NUL) + // relative to current directory + STRCPY(buf, curdir); + else if (path_with_url(buf)) + // URL can't be used here + continue; + else if (!mch_isFullName(buf)) + { + // Expand relative path to their full path equivalent + len = (int)STRLEN(curdir); + if (len + (int)STRLEN(buf) + 3 > MAXPATHL) + continue; + STRMOVE(buf + len + 1, buf); + STRCPY(buf, curdir); + buf[len] = PATHSEP; + simplify_filename(buf); + } + + if (ga_grow(gap, 1) == FAIL) + break; + +# if defined(MSWIN) + // Avoid the path ending in a backslash, it fails when a comma is + // appended. + len = (int)STRLEN(buf); + if (buf[len - 1] == '\\') + buf[len - 1] = '/'; +# endif + + p = vim_strsave(buf); + if (p == NULL) + break; + ((char_u **)gap->ga_data)[gap->ga_len++] = p; + } + + vim_free(buf); +} + +/* + * Returns a pointer to the file or directory name in "fname" that matches the + * longest path in "ga"p, or NULL if there is no match. For example: + * + * path: /foo/bar/baz + * fname: /foo/bar/baz/quux.txt + * returns: ^this + */ + static char_u * +get_path_cutoff(char_u *fname, garray_T *gap) +{ + int i; + int maxlen = 0; + char_u **path_part = (char_u **)gap->ga_data; + char_u *cutoff = NULL; + + for (i = 0; i < gap->ga_len; i++) + { + int j = 0; + + while ((fname[j] == path_part[i][j] +# if defined(MSWIN) + || (vim_ispathsep(fname[j]) && vim_ispathsep(path_part[i][j])) +# endif + ) && fname[j] != NUL && path_part[i][j] != NUL) + j++; + if (j > maxlen) + { + maxlen = j; + cutoff = &fname[j]; + } + } + + // skip to the file or directory name + if (cutoff != NULL) + while (vim_ispathsep(*cutoff)) + MB_PTR_ADV(cutoff); + + return cutoff; +} + +/* + * Sorts, removes duplicates and modifies all the fullpath names in "gap" so + * that they are unique with respect to each other while conserving the part + * that matches the pattern. Beware, this is at least O(n^2) wrt "gap->ga_len". + */ + void +uniquefy_paths(garray_T *gap, char_u *pattern) +{ + int i; + int len; + char_u **fnames = (char_u **)gap->ga_data; + int sort_again = FALSE; + char_u *pat; + char_u *file_pattern; + char_u *curdir; + regmatch_T regmatch; + garray_T path_ga; + char_u **in_curdir = NULL; + char_u *short_name; + + remove_duplicates(gap); + ga_init2(&path_ga, sizeof(char_u *), 1); + + /* + * We need to prepend a '*' at the beginning of file_pattern so that the + * regex matches anywhere in the path. FIXME: is this valid for all + * possible patterns? + */ + len = (int)STRLEN(pattern); + file_pattern = alloc(len + 2); + if (file_pattern == NULL) + return; + file_pattern[0] = '*'; + file_pattern[1] = NUL; + STRCAT(file_pattern, pattern); + pat = file_pat_to_reg_pat(file_pattern, NULL, NULL, TRUE); + vim_free(file_pattern); + if (pat == NULL) + return; + + regmatch.rm_ic = TRUE; // always ignore case + regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING); + vim_free(pat); + if (regmatch.regprog == NULL) + return; + + if ((curdir = alloc(MAXPATHL)) == NULL) + goto theend; + mch_dirname(curdir, MAXPATHL); + expand_path_option(curdir, &path_ga); + + in_curdir = ALLOC_CLEAR_MULT(char_u *, gap->ga_len); + if (in_curdir == NULL) + goto theend; + + for (i = 0; i < gap->ga_len && !got_int; i++) + { + char_u *path = fnames[i]; + int is_in_curdir; + char_u *dir_end = gettail_dir(path); + char_u *pathsep_p; + char_u *path_cutoff; + + len = (int)STRLEN(path); + is_in_curdir = fnamencmp(curdir, path, dir_end - path) == 0 + && curdir[dir_end - path] == NUL; + if (is_in_curdir) + in_curdir[i] = vim_strsave(path); + + // Shorten the filename while maintaining its uniqueness + path_cutoff = get_path_cutoff(path, &path_ga); + + // Don't assume all files can be reached without path when search + // pattern starts with star star slash, so only remove path_cutoff + // when possible. + if (pattern[0] == '*' && pattern[1] == '*' + && vim_ispathsep_nocolon(pattern[2]) + && path_cutoff != NULL + && vim_regexec(®match, path_cutoff, (colnr_T)0) + && is_unique(path_cutoff, gap, i)) + { + sort_again = TRUE; + mch_memmove(path, path_cutoff, STRLEN(path_cutoff) + 1); + } + else + { + // Here all files can be reached without path, so get shortest + // unique path. We start at the end of the path. + pathsep_p = path + len - 1; + + while (find_previous_pathsep(path, &pathsep_p)) + if (vim_regexec(®match, pathsep_p + 1, (colnr_T)0) + && is_unique(pathsep_p + 1, gap, i) + && path_cutoff != NULL && pathsep_p + 1 >= path_cutoff) + { + sort_again = TRUE; + mch_memmove(path, pathsep_p + 1, STRLEN(pathsep_p)); + break; + } + } + + if (mch_isFullName(path)) + { + /* + * Last resort: shorten relative to curdir if possible. + * 'possible' means: + * 1. It is under the current directory. + * 2. The result is actually shorter than the original. + * + * Before curdir After + * /foo/bar/file.txt /foo/bar ./file.txt + * c:\foo\bar\file.txt c:\foo\bar .\file.txt + * /file.txt / /file.txt + * c:\file.txt c:\ .\file.txt + */ + short_name = shorten_fname(path, curdir); + if (short_name != NULL && short_name > path + 1 +# if defined(MSWIN) + // On windows, + // shorten_fname("c:\a\a.txt", "c:\a\b") + // returns "\a\a.txt", which is not really the short + // name, hence: + && !vim_ispathsep(*short_name) +# endif + ) + { + STRCPY(path, "."); + add_pathsep(path); + STRMOVE(path + STRLEN(path), short_name); + } + } + ui_breakcheck(); + } + + // Shorten filenames in /in/current/directory/{filename} + for (i = 0; i < gap->ga_len && !got_int; i++) + { + char_u *rel_path; + char_u *path = in_curdir[i]; + + if (path == NULL) + continue; + + // If the {filename} is not unique, change it to ./{filename}. + // Else reduce it to {filename} + short_name = shorten_fname(path, curdir); + if (short_name == NULL) + short_name = path; + if (is_unique(short_name, gap, i)) + { + STRCPY(fnames[i], short_name); + continue; + } + + rel_path = alloc(STRLEN(short_name) + STRLEN(PATHSEPSTR) + 2); + if (rel_path == NULL) + goto theend; + STRCPY(rel_path, "."); + add_pathsep(rel_path); + STRCAT(rel_path, short_name); + + vim_free(fnames[i]); + fnames[i] = rel_path; + sort_again = TRUE; + ui_breakcheck(); + } + +theend: + vim_free(curdir); + if (in_curdir != NULL) + { + for (i = 0; i < gap->ga_len; i++) + vim_free(in_curdir[i]); + vim_free(in_curdir); + } + ga_clear_strings(&path_ga); + vim_regfree(regmatch.regprog); + + if (sort_again) + remove_duplicates(gap); +} + +/* + * Calls globpath() with 'path' values for the given pattern and stores the + * result in "gap". + * Returns the total number of matches. + */ + int +expand_in_path( + garray_T *gap, + char_u *pattern, + int flags) // EW_* flags +{ + char_u *curdir; + garray_T path_ga; + char_u *paths = NULL; + int glob_flags = 0; + + if ((curdir = alloc(MAXPATHL)) == NULL) + return 0; + mch_dirname(curdir, MAXPATHL); + + ga_init2(&path_ga, sizeof(char_u *), 1); + expand_path_option(curdir, &path_ga); + vim_free(curdir); + if (path_ga.ga_len == 0) + return 0; + + paths = ga_concat_strings(&path_ga, ","); + ga_clear_strings(&path_ga); + if (paths == NULL) + return 0; + + if (flags & EW_ICASE) + glob_flags |= WILD_ICASE; + if (flags & EW_ADDSLASH) + glob_flags |= WILD_ADD_SLASH; + globpath(paths, pattern, gap, glob_flags, FALSE); + vim_free(paths); + + return gap->ga_len; +} + + +/* + * Converts a file name into a canonical form. It simplifies a file name into + * its simplest form by stripping out unneeded components, if any. The + * resulting file name is simplified in place and will either be the same + * length as that supplied, or shorter. + */ + void +simplify_filename(char_u *filename) +{ +#ifndef AMIGA // Amiga doesn't have "..", it uses "/" + int components = 0; + char_u *p, *tail, *start; + int stripping_disabled = FALSE; + int relative = TRUE; + + p = filename; +# ifdef BACKSLASH_IN_FILENAME + if (p[0] != NUL && p[1] == ':') // skip "x:" + p += 2; +# endif + + if (vim_ispathsep(*p)) + { + relative = FALSE; + do + ++p; + while (vim_ispathsep(*p)); + } + start = p; // remember start after "c:/" or "/" or "///" +#ifdef UNIX + // Posix says that "//path" is unchanged but "///path" is "/path". + if (start > filename + 2) + { + STRMOVE(filename + 1, p); + start = p = filename + 1; + } +#endif + + do + { + // At this point "p" is pointing to the char following a single "/" + // or "p" is at the "start" of the (absolute or relative) path name. +# ifdef VMS + // VMS allows device:[path] - don't strip the [ in directory + if ((*p == '[' || *p == '<') && p > filename && p[-1] == ':') + { + // :[ or :< composition: vms directory component + ++components; + p = getnextcomp(p + 1); + } + // allow remote calls as host"user passwd"::device:[path] + else if (p[0] == ':' && p[1] == ':' && p > filename && p[-1] == '"' ) + { + // ":: composition: vms host/passwd component + ++components; + p = getnextcomp(p + 2); + } + else +# endif + if (vim_ispathsep(*p)) + STRMOVE(p, p + 1); // remove duplicate "/" + else if (p[0] == '.' && (vim_ispathsep(p[1]) || p[1] == NUL)) + { + if (p == start && relative) + p += 1 + (p[1] != NUL); // keep single "." or leading "./" + else + { + // Strip "./" or ".///". If we are at the end of the file name + // and there is no trailing path separator, either strip "/." if + // we are after "start", or strip "." if we are at the beginning + // of an absolute path name . + tail = p + 1; + if (p[1] != NUL) + while (vim_ispathsep(*tail)) + MB_PTR_ADV(tail); + else if (p > start) + --p; // strip preceding path separator + STRMOVE(p, tail); + } + } + else if (p[0] == '.' && p[1] == '.' && + (vim_ispathsep(p[2]) || p[2] == NUL)) + { + // Skip to after ".." or "../" or "..///". + tail = p + 2; + while (vim_ispathsep(*tail)) + MB_PTR_ADV(tail); + + if (components > 0) // strip one preceding component + { + int do_strip = FALSE; + char_u saved_char; + stat_T st; + + // Don't strip for an erroneous file name. + if (!stripping_disabled) + { + // If the preceding component does not exist in the file + // system, we strip it. On Unix, we don't accept a symbolic + // link that refers to a non-existent file. + saved_char = p[-1]; + p[-1] = NUL; +# ifdef UNIX + if (mch_lstat((char *)filename, &st) < 0) +# else + if (mch_stat((char *)filename, &st) < 0) +# endif + do_strip = TRUE; + p[-1] = saved_char; + + --p; + // Skip back to after previous '/'. + while (p > start && !after_pathsep(start, p)) + MB_PTR_BACK(start, p); + + if (!do_strip) + { + // If the component exists in the file system, check + // that stripping it won't change the meaning of the + // file name. First get information about the + // unstripped file name. This may fail if the component + // to strip is not a searchable directory (but a regular + // file, for instance), since the trailing "/.." cannot + // be applied then. We don't strip it then since we + // don't want to replace an erroneous file name by + // a valid one, and we disable stripping of later + // components. + saved_char = *tail; + *tail = NUL; + if (mch_stat((char *)filename, &st) >= 0) + do_strip = TRUE; + else + stripping_disabled = TRUE; + *tail = saved_char; +# ifdef UNIX + if (do_strip) + { + stat_T new_st; + + // On Unix, the check for the unstripped file name + // above works also for a symbolic link pointing to + // a searchable directory. But then the parent of + // the directory pointed to by the link must be the + // same as the stripped file name. (The latter + // exists in the file system since it is the + // component's parent directory.) + if (p == start && relative) + (void)mch_stat(".", &new_st); + else + { + saved_char = *p; + *p = NUL; + (void)mch_stat((char *)filename, &new_st); + *p = saved_char; + } + + if (new_st.st_ino != st.st_ino || + new_st.st_dev != st.st_dev) + { + do_strip = FALSE; + // We don't disable stripping of later + // components since the unstripped path name is + // still valid. + } + } +# endif + } + } + + if (!do_strip) + { + // Skip the ".." or "../" and reset the counter for the + // components that might be stripped later on. + p = tail; + components = 0; + } + else + { + // Strip previous component. If the result would get empty + // and there is no trailing path separator, leave a single + // "." instead. If we are at the end of the file name and + // there is no trailing path separator and a preceding + // component is left after stripping, strip its trailing + // path separator as well. + if (p == start && relative && tail[-1] == '.') + { + *p++ = '.'; + *p = NUL; + } + else + { + if (p > start && tail[-1] == '.') + --p; + STRMOVE(p, tail); // strip previous component + } + + --components; + } + } + else if (p == start && !relative) // leading "/.." or "/../" + STRMOVE(p, tail); // strip ".." or "../" + else + { + if (p == start + 2 && p[-2] == '.') // leading "./../" + { + STRMOVE(p - 2, p); // strip leading "./" + tail -= 2; + } + p = tail; // skip to char after ".." or "../" + } + } + else + { + ++components; // simple path component + p = getnextcomp(p); + } + } while (*p != NUL); +#endif // !AMIGA +} + +#if defined(FEAT_EVAL) || defined(PROTO) +/* + * "simplify()" function + */ + void +f_simplify(typval_T *argvars, typval_T *rettv) +{ + char_u *p; + + if (in_vim9script() && check_for_string_arg(argvars, 0) == FAIL) + return; + + p = tv_get_string_strict(&argvars[0]); + rettv->vval.v_string = vim_strsave(p); + simplify_filename(rettv->vval.v_string); // simplify in place + rettv->v_type = VAR_STRING; +} +#endif // FEAT_EVAL |