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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:09:20 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:09:20 +0000
commit029f72b1a93430b24b88eb3a72c6114d9f149737 (patch)
tree765d5c2041967f9c6fef195fe343d9234a030e90 /src/regexp_bt.c
parentInitial commit. (diff)
downloadvim-029f72b1a93430b24b88eb3a72c6114d9f149737.tar.xz
vim-029f72b1a93430b24b88eb3a72c6114d9f149737.zip
Adding upstream version 2:9.1.0016.upstream/2%9.1.0016
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/regexp_bt.c')
-rw-r--r--src/regexp_bt.c5623
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diff --git a/src/regexp_bt.c b/src/regexp_bt.c
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+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * Backtracking regular expression implementation.
+ *
+ * This file is included in "regexp.c".
+ *
+ * NOTICE:
+ *
+ * This is NOT the original regular expression code as written by Henry
+ * Spencer. This code has been modified specifically for use with the VIM
+ * editor, and should not be used separately from Vim. If you want a good
+ * regular expression library, get the original code. The copyright notice
+ * that follows is from the original.
+ *
+ * END NOTICE
+ *
+ * Copyright (c) 1986 by University of Toronto.
+ * Written by Henry Spencer. Not derived from licensed software.
+ *
+ * Permission is granted to anyone to use this software for any
+ * purpose on any computer system, and to redistribute it freely,
+ * subject to the following restrictions:
+ *
+ * 1. The author is not responsible for the consequences of use of
+ * this software, no matter how awful, even if they arise
+ * from defects in it.
+ *
+ * 2. The origin of this software must not be misrepresented, either
+ * by explicit claim or by omission.
+ *
+ * 3. Altered versions must be plainly marked as such, and must not
+ * be misrepresented as being the original software.
+ *
+ * Beware that some of this code is subtly aware of the way operator
+ * precedence is structured in regular expressions. Serious changes in
+ * regular-expression syntax might require a total rethink.
+ *
+ * Changes have been made by Tony Andrews, Olaf 'Rhialto' Seibert, Robert
+ * Webb, Ciaran McCreesh and Bram Moolenaar.
+ * Named character class support added by Walter Briscoe (1998 Jul 01)
+ */
+
+/*
+ * The "internal use only" fields in regexp.h are present to pass info from
+ * compile to execute that permits the execute phase to run lots faster on
+ * simple cases. They are:
+ *
+ * regstart char that must begin a match; NUL if none obvious; Can be a
+ * multi-byte character.
+ * reganch is the match anchored (at beginning-of-line only)?
+ * regmust string (pointer into program) that match must include, or NULL
+ * regmlen length of regmust string
+ * regflags RF_ values or'ed together
+ *
+ * Regstart and reganch permit very fast decisions on suitable starting points
+ * for a match, cutting down the work a lot. Regmust permits fast rejection
+ * of lines that cannot possibly match. The regmust tests are costly enough
+ * that vim_regcomp() supplies a regmust only if the r.e. contains something
+ * potentially expensive (at present, the only such thing detected is * or +
+ * at the start of the r.e., which can involve a lot of backup). Regmlen is
+ * supplied because the test in vim_regexec() needs it and vim_regcomp() is
+ * computing it anyway.
+ */
+
+/*
+ * Structure for regexp "program". This is essentially a linear encoding
+ * of a nondeterministic finite-state machine (aka syntax charts or
+ * "railroad normal form" in parsing technology). Each node is an opcode
+ * plus a "next" pointer, possibly plus an operand. "Next" pointers of
+ * all nodes except BRANCH and BRACES_COMPLEX implement concatenation; a "next"
+ * pointer with a BRANCH on both ends of it is connecting two alternatives.
+ * (Here we have one of the subtle syntax dependencies: an individual BRANCH
+ * (as opposed to a collection of them) is never concatenated with anything
+ * because of operator precedence). The "next" pointer of a BRACES_COMPLEX
+ * node points to the node after the stuff to be repeated.
+ * The operand of some types of node is a literal string; for others, it is a
+ * node leading into a sub-FSM. In particular, the operand of a BRANCH node
+ * is the first node of the branch.
+ * (NB this is *not* a tree structure: the tail of the branch connects to the
+ * thing following the set of BRANCHes.)
+ *
+ * pattern is coded like:
+ *
+ * +-----------------+
+ * | V
+ * <aa>\|<bb> BRANCH <aa> BRANCH <bb> --> END
+ * | ^ | ^
+ * +------+ +----------+
+ *
+ *
+ * +------------------+
+ * V |
+ * <aa>* BRANCH BRANCH <aa> --> BACK BRANCH --> NOTHING --> END
+ * | | ^ ^
+ * | +---------------+ |
+ * +---------------------------------------------+
+ *
+ *
+ * +----------------------+
+ * V |
+ * <aa>\+ BRANCH <aa> --> BRANCH --> BACK BRANCH --> NOTHING --> END
+ * | | ^ ^
+ * | +-----------+ |
+ * +--------------------------------------------------+
+ *
+ *
+ * +-------------------------+
+ * V |
+ * <aa>\{} BRANCH BRACE_LIMITS --> BRACE_COMPLEX <aa> --> BACK END
+ * | | ^
+ * | +----------------+
+ * +-----------------------------------------------+
+ *
+ *
+ * <aa>\@!<bb> BRANCH NOMATCH <aa> --> END <bb> --> END
+ * | | ^ ^
+ * | +----------------+ |
+ * +--------------------------------+
+ *
+ * +---------+
+ * | V
+ * \z[abc] BRANCH BRANCH a BRANCH b BRANCH c BRANCH NOTHING --> END
+ * | | | | ^ ^
+ * | | | +-----+ |
+ * | | +----------------+ |
+ * | +---------------------------+ |
+ * +------------------------------------------------------+
+ *
+ * They all start with a BRANCH for "\|" alternatives, even when there is only
+ * one alternative.
+ */
+
+/*
+ * The opcodes are:
+ */
+
+// definition number opnd? meaning
+#define END 0 // End of program or NOMATCH operand.
+#define BOL 1 // Match "" at beginning of line.
+#define EOL 2 // Match "" at end of line.
+#define BRANCH 3 // node Match this alternative, or the
+ // next...
+#define BACK 4 // Match "", "next" ptr points backward.
+#define EXACTLY 5 // str Match this string.
+#define NOTHING 6 // Match empty string.
+#define STAR 7 // node Match this (simple) thing 0 or more
+ // times.
+#define PLUS 8 // node Match this (simple) thing 1 or more
+ // times.
+#define MATCH 9 // node match the operand zero-width
+#define NOMATCH 10 // node check for no match with operand
+#define BEHIND 11 // node look behind for a match with operand
+#define NOBEHIND 12 // node look behind for no match with operand
+#define SUBPAT 13 // node match the operand here
+#define BRACE_SIMPLE 14 // node Match this (simple) thing between m and
+ // n times (\{m,n\}).
+#define BOW 15 // Match "" after [^a-zA-Z0-9_]
+#define EOW 16 // Match "" at [^a-zA-Z0-9_]
+#define BRACE_LIMITS 17 // nr nr define the min & max for BRACE_SIMPLE
+ // and BRACE_COMPLEX.
+#define NEWL 18 // Match line-break
+#define BHPOS 19 // End position for BEHIND or NOBEHIND
+
+
+// character classes: 20-48 normal, 50-78 include a line-break
+#define ADD_NL 30
+#define FIRST_NL ANY + ADD_NL
+#define ANY 20 // Match any one character.
+#define ANYOF 21 // str Match any character in this string.
+#define ANYBUT 22 // str Match any character not in this
+ // string.
+#define IDENT 23 // Match identifier char
+#define SIDENT 24 // Match identifier char but no digit
+#define KWORD 25 // Match keyword char
+#define SKWORD 26 // Match word char but no digit
+#define FNAME 27 // Match file name char
+#define SFNAME 28 // Match file name char but no digit
+#define PRINT 29 // Match printable char
+#define SPRINT 30 // Match printable char but no digit
+#define WHITE 31 // Match whitespace char
+#define NWHITE 32 // Match non-whitespace char
+#define DIGIT 33 // Match digit char
+#define NDIGIT 34 // Match non-digit char
+#define HEX 35 // Match hex char
+#define NHEX 36 // Match non-hex char
+#define OCTAL 37 // Match octal char
+#define NOCTAL 38 // Match non-octal char
+#define WORD 39 // Match word char
+#define NWORD 40 // Match non-word char
+#define HEAD 41 // Match head char
+#define NHEAD 42 // Match non-head char
+#define ALPHA 43 // Match alpha char
+#define NALPHA 44 // Match non-alpha char
+#define LOWER 45 // Match lowercase char
+#define NLOWER 46 // Match non-lowercase char
+#define UPPER 47 // Match uppercase char
+#define NUPPER 48 // Match non-uppercase char
+#define LAST_NL NUPPER + ADD_NL
+#define WITH_NL(op) ((op) >= FIRST_NL && (op) <= LAST_NL)
+
+#define MOPEN 80 // -89 Mark this point in input as start of
+ // \( subexpr. MOPEN + 0 marks start of
+ // match.
+#define MCLOSE 90 // -99 Analogous to MOPEN. MCLOSE + 0 marks
+ // end of match.
+#define BACKREF 100 // -109 node Match same string again \1-\9
+
+#ifdef FEAT_SYN_HL
+# define ZOPEN 110 // -119 Mark this point in input as start of
+ // \z( subexpr.
+# define ZCLOSE 120 // -129 Analogous to ZOPEN.
+# define ZREF 130 // -139 node Match external submatch \z1-\z9
+#endif
+
+#define BRACE_COMPLEX 140 // -149 node Match nodes between m & n times
+
+#define NOPEN 150 // Mark this point in input as start of
+ // \%( subexpr.
+#define NCLOSE 151 // Analogous to NOPEN.
+
+#define MULTIBYTECODE 200 // mbc Match one multi-byte character
+#define RE_BOF 201 // Match "" at beginning of file.
+#define RE_EOF 202 // Match "" at end of file.
+#define CURSOR 203 // Match location of cursor.
+
+#define RE_LNUM 204 // nr cmp Match line number
+#define RE_COL 205 // nr cmp Match column number
+#define RE_VCOL 206 // nr cmp Match virtual column number
+
+#define RE_MARK 207 // mark cmp Match mark position
+#define RE_VISUAL 208 // Match Visual area
+#define RE_COMPOSING 209 // any composing characters
+
+/*
+ * Flags to be passed up and down.
+ */
+#define HASWIDTH 0x1 // Known never to match null string.
+#define SIMPLE 0x2 // Simple enough to be STAR/PLUS operand.
+#define SPSTART 0x4 // Starts with * or +.
+#define HASNL 0x8 // Contains some \n.
+#define HASLOOKBH 0x10 // Contains "\@<=" or "\@<!".
+#define WORST 0 // Worst case.
+
+static int num_complex_braces; // Complex \{...} count
+static char_u *regcode; // Code-emit pointer, or JUST_CALC_SIZE
+static long regsize; // Code size.
+static int reg_toolong; // TRUE when offset out of range
+static char_u had_endbrace[NSUBEXP]; // flags, TRUE if end of () found
+static long brace_min[10]; // Minimums for complex brace repeats
+static long brace_max[10]; // Maximums for complex brace repeats
+static int brace_count[10]; // Current counts for complex brace repeats
+static int one_exactly = FALSE; // only do one char for EXACTLY
+
+// When making changes to classchars also change nfa_classcodes.
+static char_u *classchars = (char_u *)".iIkKfFpPsSdDxXoOwWhHaAlLuU";
+static int classcodes[] = {
+ ANY, IDENT, SIDENT, KWORD, SKWORD,
+ FNAME, SFNAME, PRINT, SPRINT,
+ WHITE, NWHITE, DIGIT, NDIGIT,
+ HEX, NHEX, OCTAL, NOCTAL,
+ WORD, NWORD, HEAD, NHEAD,
+ ALPHA, NALPHA, LOWER, NLOWER,
+ UPPER, NUPPER
+};
+
+/*
+ * When regcode is set to this value, code is not emitted and size is computed
+ * instead.
+ */
+#define JUST_CALC_SIZE ((char_u *) -1)
+
+// Values for rs_state in regitem_T.
+typedef enum regstate_E
+{
+ RS_NOPEN = 0 // NOPEN and NCLOSE
+ , RS_MOPEN // MOPEN + [0-9]
+ , RS_MCLOSE // MCLOSE + [0-9]
+#ifdef FEAT_SYN_HL
+ , RS_ZOPEN // ZOPEN + [0-9]
+ , RS_ZCLOSE // ZCLOSE + [0-9]
+#endif
+ , RS_BRANCH // BRANCH
+ , RS_BRCPLX_MORE // BRACE_COMPLEX and trying one more match
+ , RS_BRCPLX_LONG // BRACE_COMPLEX and trying longest match
+ , RS_BRCPLX_SHORT // BRACE_COMPLEX and trying shortest match
+ , RS_NOMATCH // NOMATCH
+ , RS_BEHIND1 // BEHIND / NOBEHIND matching rest
+ , RS_BEHIND2 // BEHIND / NOBEHIND matching behind part
+ , RS_STAR_LONG // STAR/PLUS/BRACE_SIMPLE longest match
+ , RS_STAR_SHORT // STAR/PLUS/BRACE_SIMPLE shortest match
+} regstate_T;
+
+/*
+ * Structure used to save the current input state, when it needs to be
+ * restored after trying a match. Used by reg_save() and reg_restore().
+ * Also stores the length of "backpos".
+ */
+typedef struct
+{
+ union
+ {
+ char_u *ptr; // rex.input pointer, for single-line regexp
+ lpos_T pos; // rex.input pos, for multi-line regexp
+ } rs_u;
+ int rs_len;
+} regsave_T;
+
+// struct to save start/end pointer/position in for \(\)
+typedef struct
+{
+ union
+ {
+ char_u *ptr;
+ lpos_T pos;
+ } se_u;
+} save_se_T;
+
+// used for BEHIND and NOBEHIND matching
+typedef struct regbehind_S
+{
+ regsave_T save_after;
+ regsave_T save_behind;
+ int save_need_clear_subexpr;
+ save_se_T save_start[NSUBEXP];
+ save_se_T save_end[NSUBEXP];
+} regbehind_T;
+
+/*
+ * When there are alternatives a regstate_T is put on the regstack to remember
+ * what we are doing.
+ * Before it may be another type of item, depending on rs_state, to remember
+ * more things.
+ */
+typedef struct regitem_S
+{
+ regstate_T rs_state; // what we are doing, one of RS_ above
+ short rs_no; // submatch nr or BEHIND/NOBEHIND
+ char_u *rs_scan; // current node in program
+ union
+ {
+ save_se_T sesave;
+ regsave_T regsave;
+ } rs_un; // room for saving rex.input
+} regitem_T;
+
+
+// used for STAR, PLUS and BRACE_SIMPLE matching
+typedef struct regstar_S
+{
+ int nextb; // next byte
+ int nextb_ic; // next byte reverse case
+ long count;
+ long minval;
+ long maxval;
+} regstar_T;
+
+// used to store input position when a BACK was encountered, so that we now if
+// we made any progress since the last time.
+typedef struct backpos_S
+{
+ char_u *bp_scan; // "scan" where BACK was encountered
+ regsave_T bp_pos; // last input position
+} backpos_T;
+
+/*
+ * "regstack" and "backpos" are used by regmatch(). They are kept over calls
+ * to avoid invoking malloc() and free() often.
+ * "regstack" is a stack with regitem_T items, sometimes preceded by regstar_T
+ * or regbehind_T.
+ * "backpos_T" is a table with backpos_T for BACK
+ */
+static garray_T regstack = {0, 0, 0, 0, NULL};
+static garray_T backpos = {0, 0, 0, 0, NULL};
+
+static regsave_T behind_pos;
+
+/*
+ * Both for regstack and backpos tables we use the following strategy of
+ * allocation (to reduce malloc/free calls):
+ * - Initial size is fairly small.
+ * - When needed, the tables are grown bigger (8 times at first, double after
+ * that).
+ * - After executing the match we free the memory only if the array has grown.
+ * Thus the memory is kept allocated when it's at the initial size.
+ * This makes it fast while not keeping a lot of memory allocated.
+ * A three times speed increase was observed when using many simple patterns.
+ */
+#define REGSTACK_INITIAL 2048
+#define BACKPOS_INITIAL 64
+
+/*
+ * Opcode notes:
+ *
+ * BRANCH The set of branches constituting a single choice are hooked
+ * together with their "next" pointers, since precedence prevents
+ * anything being concatenated to any individual branch. The
+ * "next" pointer of the last BRANCH in a choice points to the
+ * thing following the whole choice. This is also where the
+ * final "next" pointer of each individual branch points; each
+ * branch starts with the operand node of a BRANCH node.
+ *
+ * BACK Normal "next" pointers all implicitly point forward; BACK
+ * exists to make loop structures possible.
+ *
+ * STAR,PLUS '=', and complex '*' and '+', are implemented as circular
+ * BRANCH structures using BACK. Simple cases (one character
+ * per match) are implemented with STAR and PLUS for speed
+ * and to minimize recursive plunges.
+ *
+ * BRACE_LIMITS This is always followed by a BRACE_SIMPLE or BRACE_COMPLEX
+ * node, and defines the min and max limits to be used for that
+ * node.
+ *
+ * MOPEN,MCLOSE ...are numbered at compile time.
+ * ZOPEN,ZCLOSE ...ditto
+ */
+
+/*
+ * A node is one char of opcode followed by two chars of "next" pointer.
+ * "Next" pointers are stored as two 8-bit bytes, high order first. The
+ * value is a positive offset from the opcode of the node containing it.
+ * An operand, if any, simply follows the node. (Note that much of the
+ * code generation knows about this implicit relationship.)
+ *
+ * Using two bytes for the "next" pointer is vast overkill for most things,
+ * but allows patterns to get big without disasters.
+ */
+#define OP(p) ((int)*(p))
+#define NEXT(p) (((*((p) + 1) & 0377) << 8) + (*((p) + 2) & 0377))
+#define OPERAND(p) ((p) + 3)
+// Obtain an operand that was stored as four bytes, MSB first.
+#define OPERAND_MIN(p) (((long)(p)[3] << 24) + ((long)(p)[4] << 16) \
+ + ((long)(p)[5] << 8) + (long)(p)[6])
+// Obtain a second operand stored as four bytes.
+#define OPERAND_MAX(p) OPERAND_MIN((p) + 4)
+// Obtain a second single-byte operand stored after a four bytes operand.
+#define OPERAND_CMP(p) (p)[7]
+
+static char_u *reg(int paren, int *flagp);
+
+#ifdef BT_REGEXP_DUMP
+static void regdump(char_u *, bt_regprog_T *);
+#endif
+
+static int re_num_cmp(long_u val, char_u *scan);
+
+#ifdef DEBUG
+static char_u *regprop(char_u *);
+
+static int regnarrate = 0;
+#endif
+
+
+/*
+ * Setup to parse the regexp. Used once to get the length and once to do it.
+ */
+ static void
+regcomp_start(
+ char_u *expr,
+ int re_flags) // see vim_regcomp()
+{
+ initchr(expr);
+ if (re_flags & RE_MAGIC)
+ reg_magic = MAGIC_ON;
+ else
+ reg_magic = MAGIC_OFF;
+ reg_string = (re_flags & RE_STRING);
+ reg_strict = (re_flags & RE_STRICT);
+ get_cpo_flags();
+
+ num_complex_braces = 0;
+ regnpar = 1;
+ CLEAR_FIELD(had_endbrace);
+#ifdef FEAT_SYN_HL
+ regnzpar = 1;
+ re_has_z = 0;
+#endif
+ regsize = 0L;
+ reg_toolong = FALSE;
+ regflags = 0;
+#if defined(FEAT_SYN_HL) || defined(PROTO)
+ had_eol = FALSE;
+#endif
+}
+
+/*
+ * Return TRUE if MULTIBYTECODE should be used instead of EXACTLY for
+ * character "c".
+ */
+ static int
+use_multibytecode(int c)
+{
+ return has_mbyte && (*mb_char2len)(c) > 1
+ && (re_multi_type(peekchr()) != NOT_MULTI
+ || (enc_utf8 && utf_iscomposing(c)));
+}
+
+/*
+ * Emit (if appropriate) a byte of code
+ */
+ static void
+regc(int b)
+{
+ if (regcode == JUST_CALC_SIZE)
+ regsize++;
+ else
+ *regcode++ = b;
+}
+
+/*
+ * Emit (if appropriate) a multi-byte character of code
+ */
+ static void
+regmbc(int c)
+{
+ if (!has_mbyte && c > 0xff)
+ return;
+ if (regcode == JUST_CALC_SIZE)
+ regsize += (*mb_char2len)(c);
+ else
+ regcode += (*mb_char2bytes)(c, regcode);
+}
+
+
+/*
+ * Produce the bytes for equivalence class "c".
+ * Currently only handles latin1, latin9 and utf-8.
+ * NOTE: When changing this function, also change nfa_emit_equi_class()
+ */
+ static void
+reg_equi_class(int c)
+{
+ if (enc_utf8 || STRCMP(p_enc, "latin1") == 0
+ || STRCMP(p_enc, "iso-8859-15") == 0)
+ {
+ switch (c)
+ {
+ // Do not use '\300' style, it results in a negative number.
+ case 'A': case 0xc0: case 0xc1: case 0xc2: case 0xc3: case 0xc4:
+ case 0xc5: case 0x100: case 0x102: case 0x104: case 0x1cd:
+ case 0x1de: case 0x1e0: case 0x1fa: case 0x202: case 0x226:
+ case 0x23a: case 0x1e00: case 0x1ea0: case 0x1ea2: case 0x1ea4:
+ case 0x1ea6: case 0x1ea8: case 0x1eaa: case 0x1eac: case 0x1eae:
+ case 0x1eb0: case 0x1eb2: case 0x1eb4: case 0x1eb6:
+ regmbc('A'); regmbc(0xc0); regmbc(0xc1); regmbc(0xc2);
+ regmbc(0xc3); regmbc(0xc4); regmbc(0xc5);
+ regmbc(0x100); regmbc(0x102); regmbc(0x104);
+ regmbc(0x1cd); regmbc(0x1de); regmbc(0x1e0);
+ regmbc(0x1fa); regmbc(0x202); regmbc(0x226);
+ regmbc(0x23a); regmbc(0x1e00); regmbc(0x1ea0);
+ regmbc(0x1ea2); regmbc(0x1ea4); regmbc(0x1ea6);
+ regmbc(0x1ea8); regmbc(0x1eaa); regmbc(0x1eac);
+ regmbc(0x1eae); regmbc(0x1eb0); regmbc(0x1eb2);
+ regmbc(0x1eb4); regmbc(0x1eb6);
+ return;
+ case 'B': case 0x181: case 0x243: case 0x1e02:
+ case 0x1e04: case 0x1e06:
+ regmbc('B');
+ regmbc(0x181); regmbc(0x243); regmbc(0x1e02);
+ regmbc(0x1e04); regmbc(0x1e06);
+ return;
+ case 'C': case 0xc7:
+ case 0x106: case 0x108: case 0x10a: case 0x10c: case 0x187:
+ case 0x23b: case 0x1e08: case 0xa792:
+ regmbc('C'); regmbc(0xc7);
+ regmbc(0x106); regmbc(0x108); regmbc(0x10a);
+ regmbc(0x10c); regmbc(0x187); regmbc(0x23b);
+ regmbc(0x1e08); regmbc(0xa792);
+ return;
+ case 'D': case 0x10e: case 0x110: case 0x18a:
+ case 0x1e0a: case 0x1e0c: case 0x1e0e: case 0x1e10:
+ case 0x1e12:
+ regmbc('D'); regmbc(0x10e); regmbc(0x110);
+ regmbc(0x18a); regmbc(0x1e0a); regmbc(0x1e0c);
+ regmbc(0x1e0e); regmbc(0x1e10); regmbc(0x1e12);
+ return;
+ case 'E': case 0xc8: case 0xc9: case 0xca: case 0xcb:
+ case 0x112: case 0x114: case 0x116: case 0x118: case 0x11a:
+ case 0x204: case 0x206: case 0x228: case 0x246: case 0x1e14:
+ case 0x1e16: case 0x1e18: case 0x1e1a: case 0x1e1c:
+ case 0x1eb8: case 0x1eba: case 0x1ebc: case 0x1ebe:
+ case 0x1ec0: case 0x1ec2: case 0x1ec4: case 0x1ec6:
+ regmbc('E'); regmbc(0xc8); regmbc(0xc9);
+ regmbc(0xca); regmbc(0xcb); regmbc(0x112);
+ regmbc(0x114); regmbc(0x116); regmbc(0x118);
+ regmbc(0x11a); regmbc(0x204); regmbc(0x206);
+ regmbc(0x228); regmbc(0x246); regmbc(0x1e14);
+ regmbc(0x1e16); regmbc(0x1e18); regmbc(0x1e1a);
+ regmbc(0x1e1c); regmbc(0x1eb8); regmbc(0x1eba);
+ regmbc(0x1ebc); regmbc(0x1ebe); regmbc(0x1ec0);
+ regmbc(0x1ec2); regmbc(0x1ec4); regmbc(0x1ec6);
+ return;
+ case 'F': case 0x191: case 0x1e1e: case 0xa798:
+ regmbc('F'); regmbc(0x191); regmbc(0x1e1e);
+ regmbc(0xa798);
+ return;
+ case 'G': case 0x11c: case 0x11e: case 0x120:
+ case 0x122: case 0x193: case 0x1e4: case 0x1e6:
+ case 0x1f4: case 0x1e20: case 0xa7a0:
+ regmbc('G'); regmbc(0x11c); regmbc(0x11e);
+ regmbc(0x120); regmbc(0x122); regmbc(0x193);
+ regmbc(0x1e4); regmbc(0x1e6); regmbc(0x1f4);
+ regmbc(0x1e20); regmbc(0xa7a0);
+ return;
+ case 'H': case 0x124: case 0x126: case 0x21e:
+ case 0x1e22: case 0x1e24: case 0x1e26:
+ case 0x1e28: case 0x1e2a: case 0x2c67:
+ regmbc('H'); regmbc(0x124); regmbc(0x126);
+ regmbc(0x21e); regmbc(0x1e22); regmbc(0x1e24);
+ regmbc(0x1e26); regmbc(0x1e28); regmbc(0x1e2a);
+ regmbc(0x2c67);
+ return;
+ case 'I': case 0xcc: case 0xcd: case 0xce: case 0xcf:
+ case 0x128: case 0x12a: case 0x12c: case 0x12e:
+ case 0x130: case 0x197: case 0x1cf: case 0x208:
+ case 0x20a: case 0x1e2c: case 0x1e2e: case 0x1ec8:
+ case 0x1eca:
+ regmbc('I'); regmbc(0xcc); regmbc(0xcd);
+ regmbc(0xce); regmbc(0xcf); regmbc(0x128);
+ regmbc(0x12a); regmbc(0x12c); regmbc(0x12e);
+ regmbc(0x130); regmbc(0x197); regmbc(0x1cf);
+ regmbc(0x208); regmbc(0x20a); regmbc(0x1e2c);
+ regmbc(0x1e2e); regmbc(0x1ec8); regmbc(0x1eca);
+ return;
+ case 'J': case 0x134: case 0x248:
+ regmbc('J'); regmbc(0x134); regmbc(0x248);
+ return;
+ case 'K': case 0x136: case 0x198: case 0x1e8: case 0x1e30:
+ case 0x1e32: case 0x1e34: case 0x2c69: case 0xa740:
+ regmbc('K'); regmbc(0x136); regmbc(0x198);
+ regmbc(0x1e8); regmbc(0x1e30); regmbc(0x1e32);
+ regmbc(0x1e34); regmbc(0x2c69); regmbc(0xa740);
+ return;
+ case 'L': case 0x139: case 0x13b: case 0x13d: case 0x13f:
+ case 0x141: case 0x23d: case 0x1e36: case 0x1e38:
+ case 0x1e3a: case 0x1e3c: case 0x2c60:
+ regmbc('L'); regmbc(0x139); regmbc(0x13b);
+ regmbc(0x13d); regmbc(0x13f); regmbc(0x141);
+ regmbc(0x23d); regmbc(0x1e36); regmbc(0x1e38);
+ regmbc(0x1e3a); regmbc(0x1e3c); regmbc(0x2c60);
+ return;
+ case 'M': case 0x1e3e: case 0x1e40: case 0x1e42:
+ regmbc('M'); regmbc(0x1e3e); regmbc(0x1e40);
+ regmbc(0x1e42);
+ return;
+ case 'N': case 0xd1:
+ case 0x143: case 0x145: case 0x147: case 0x1f8:
+ case 0x1e44: case 0x1e46: case 0x1e48: case 0x1e4a:
+ case 0xa7a4:
+ regmbc('N'); regmbc(0xd1);
+ regmbc(0x143); regmbc(0x145); regmbc(0x147);
+ regmbc(0x1f8); regmbc(0x1e44); regmbc(0x1e46);
+ regmbc(0x1e48); regmbc(0x1e4a); regmbc(0xa7a4);
+ return;
+ case 'O': case 0xd2: case 0xd3: case 0xd4: case 0xd5: case 0xd6:
+ case 0xd8: case 0x14c: case 0x14e: case 0x150: case 0x19f:
+ case 0x1a0: case 0x1d1: case 0x1ea: case 0x1ec: case 0x1fe:
+ case 0x20c: case 0x20e: case 0x22a: case 0x22c: case 0x22e:
+ case 0x230: case 0x1e4c: case 0x1e4e: case 0x1e50: case 0x1e52:
+ case 0x1ecc: case 0x1ece: case 0x1ed0: case 0x1ed2: case 0x1ed4:
+ case 0x1ed6: case 0x1ed8: case 0x1eda: case 0x1edc: case 0x1ede:
+ case 0x1ee0: case 0x1ee2:
+ regmbc('O'); regmbc(0xd2); regmbc(0xd3); regmbc(0xd4);
+ regmbc(0xd5); regmbc(0xd6); regmbc(0xd8);
+ regmbc(0x14c); regmbc(0x14e); regmbc(0x150);
+ regmbc(0x19f); regmbc(0x1a0); regmbc(0x1d1);
+ regmbc(0x1ea); regmbc(0x1ec); regmbc(0x1fe);
+ regmbc(0x20c); regmbc(0x20e); regmbc(0x22a);
+ regmbc(0x22c); regmbc(0x22e); regmbc(0x230);
+ regmbc(0x1e4c); regmbc(0x1e4e); regmbc(0x1e50);
+ regmbc(0x1e52); regmbc(0x1ecc); regmbc(0x1ece);
+ regmbc(0x1ed0); regmbc(0x1ed2); regmbc(0x1ed4);
+ regmbc(0x1ed6); regmbc(0x1ed8); regmbc(0x1eda);
+ regmbc(0x1edc); regmbc(0x1ede); regmbc(0x1ee0);
+ regmbc(0x1ee2);
+ return;
+ case 'P': case 0x1a4: case 0x1e54: case 0x1e56: case 0x2c63:
+ regmbc('P'); regmbc(0x1a4); regmbc(0x1e54);
+ regmbc(0x1e56); regmbc(0x2c63);
+ return;
+ case 'Q': case 0x24a:
+ regmbc('Q'); regmbc(0x24a);
+ return;
+ case 'R': case 0x154: case 0x156: case 0x158: case 0x210:
+ case 0x212: case 0x24c: case 0x1e58: case 0x1e5a:
+ case 0x1e5c: case 0x1e5e: case 0x2c64: case 0xa7a6:
+ regmbc('R'); regmbc(0x154); regmbc(0x156);
+ regmbc(0x210); regmbc(0x212); regmbc(0x158);
+ regmbc(0x24c); regmbc(0x1e58); regmbc(0x1e5a);
+ regmbc(0x1e5c); regmbc(0x1e5e); regmbc(0x2c64);
+ regmbc(0xa7a6);
+ return;
+ case 'S': case 0x15a: case 0x15c: case 0x15e: case 0x160:
+ case 0x218: case 0x1e60: case 0x1e62: case 0x1e64:
+ case 0x1e66: case 0x1e68: case 0x2c7e: case 0xa7a8:
+ regmbc('S'); regmbc(0x15a); regmbc(0x15c);
+ regmbc(0x15e); regmbc(0x160); regmbc(0x218);
+ regmbc(0x1e60); regmbc(0x1e62); regmbc(0x1e64);
+ regmbc(0x1e66); regmbc(0x1e68); regmbc(0x2c7e);
+ regmbc(0xa7a8);
+ return;
+ case 'T': case 0x162: case 0x164: case 0x166: case 0x1ac:
+ case 0x1ae: case 0x21a: case 0x23e: case 0x1e6a: case 0x1e6c:
+ case 0x1e6e: case 0x1e70:
+ regmbc('T'); regmbc(0x162); regmbc(0x164);
+ regmbc(0x166); regmbc(0x1ac); regmbc(0x23e);
+ regmbc(0x1ae); regmbc(0x21a); regmbc(0x1e6a);
+ regmbc(0x1e6c); regmbc(0x1e6e); regmbc(0x1e70);
+ return;
+ case 'U': case 0xd9: case 0xda: case 0xdb: case 0xdc:
+ case 0x168: case 0x16a: case 0x16c: case 0x16e:
+ case 0x170: case 0x172: case 0x1af: case 0x1d3:
+ case 0x1d5: case 0x1d7: case 0x1d9: case 0x1db:
+ case 0x214: case 0x216: case 0x244: case 0x1e72:
+ case 0x1e74: case 0x1e76: case 0x1e78: case 0x1e7a:
+ case 0x1ee4: case 0x1ee6: case 0x1ee8: case 0x1eea:
+ case 0x1eec: case 0x1eee: case 0x1ef0:
+ regmbc('U'); regmbc(0xd9); regmbc(0xda);
+ regmbc(0xdb); regmbc(0xdc); regmbc(0x168);
+ regmbc(0x16a); regmbc(0x16c); regmbc(0x16e);
+ regmbc(0x170); regmbc(0x172); regmbc(0x1af);
+ regmbc(0x1d3); regmbc(0x1d5); regmbc(0x1d7);
+ regmbc(0x1d9); regmbc(0x1db); regmbc(0x214);
+ regmbc(0x216); regmbc(0x244); regmbc(0x1e72);
+ regmbc(0x1e74); regmbc(0x1e76); regmbc(0x1e78);
+ regmbc(0x1e7a); regmbc(0x1ee4); regmbc(0x1ee6);
+ regmbc(0x1ee8); regmbc(0x1eea); regmbc(0x1eec);
+ regmbc(0x1eee); regmbc(0x1ef0);
+ return;
+ case 'V': case 0x1b2: case 0x1e7c: case 0x1e7e:
+ regmbc('V'); regmbc(0x1b2); regmbc(0x1e7c);
+ regmbc(0x1e7e);
+ return;
+ case 'W': case 0x174: case 0x1e80: case 0x1e82:
+ case 0x1e84: case 0x1e86: case 0x1e88:
+ regmbc('W'); regmbc(0x174); regmbc(0x1e80);
+ regmbc(0x1e82); regmbc(0x1e84); regmbc(0x1e86);
+ regmbc(0x1e88);
+ return;
+ case 'X': case 0x1e8a: case 0x1e8c:
+ regmbc('X'); regmbc(0x1e8a); regmbc(0x1e8c);
+ return;
+ case 'Y': case 0xdd:
+ case 0x176: case 0x178: case 0x1b3: case 0x232: case 0x24e:
+ case 0x1e8e: case 0x1ef2: case 0x1ef6: case 0x1ef4: case 0x1ef8:
+ regmbc('Y'); regmbc(0xdd); regmbc(0x176);
+ regmbc(0x178); regmbc(0x1b3); regmbc(0x232);
+ regmbc(0x24e); regmbc(0x1e8e); regmbc(0x1ef2);
+ regmbc(0x1ef4); regmbc(0x1ef6); regmbc(0x1ef8);
+ return;
+ case 'Z': case 0x179: case 0x17b: case 0x17d: case 0x1b5:
+ case 0x1e90: case 0x1e92: case 0x1e94: case 0x2c6b:
+ regmbc('Z'); regmbc(0x179); regmbc(0x17b);
+ regmbc(0x17d); regmbc(0x1b5); regmbc(0x1e90);
+ regmbc(0x1e92); regmbc(0x1e94); regmbc(0x2c6b);
+ return;
+ case 'a': case 0xe0: case 0xe1: case 0xe2:
+ case 0xe3: case 0xe4: case 0xe5: case 0x101: case 0x103:
+ case 0x105: case 0x1ce: case 0x1df: case 0x1e1: case 0x1fb:
+ case 0x201: case 0x203: case 0x227: case 0x1d8f: case 0x1e01:
+ case 0x1e9a: case 0x1ea1: case 0x1ea3: case 0x1ea5:
+ case 0x1ea7: case 0x1ea9: case 0x1eab: case 0x1ead:
+ case 0x1eaf: case 0x1eb1: case 0x1eb3: case 0x1eb5:
+ case 0x1eb7: case 0x2c65:
+ regmbc('a'); regmbc(0xe0); regmbc(0xe1);
+ regmbc(0xe2); regmbc(0xe3); regmbc(0xe4);
+ regmbc(0xe5); regmbc(0x101); regmbc(0x103);
+ regmbc(0x105); regmbc(0x1ce); regmbc(0x1df);
+ regmbc(0x1e1); regmbc(0x1fb); regmbc(0x201);
+ regmbc(0x203); regmbc(0x227); regmbc(0x1d8f);
+ regmbc(0x1e01); regmbc(0x1e9a); regmbc(0x1ea1);
+ regmbc(0x1ea3); regmbc(0x1ea5); regmbc(0x1ea7);
+ regmbc(0x1ea9); regmbc(0x1eab); regmbc(0x1ead);
+ regmbc(0x1eaf); regmbc(0x1eb1); regmbc(0x1eb3);
+ regmbc(0x1eb5); regmbc(0x1eb7); regmbc(0x2c65);
+ return;
+ case 'b': case 0x180: case 0x253: case 0x1d6c: case 0x1d80:
+ case 0x1e03: case 0x1e05: case 0x1e07:
+ regmbc('b');
+ regmbc(0x180); regmbc(0x253); regmbc(0x1d6c);
+ regmbc(0x1d80); regmbc(0x1e03); regmbc(0x1e05);
+ regmbc(0x1e07);
+ return;
+ case 'c': case 0xe7:
+ case 0x107: case 0x109: case 0x10b: case 0x10d: case 0x188:
+ case 0x23c: case 0x1e09: case 0xa793: case 0xa794:
+ regmbc('c'); regmbc(0xe7); regmbc(0x107);
+ regmbc(0x109); regmbc(0x10b); regmbc(0x10d);
+ regmbc(0x188); regmbc(0x23c); regmbc(0x1e09);
+ regmbc(0xa793); regmbc(0xa794);
+ return;
+ case 'd': case 0x10f: case 0x111: case 0x257: case 0x1d6d:
+ case 0x1d81: case 0x1d91: case 0x1e0b: case 0x1e0d:
+ case 0x1e0f: case 0x1e11: case 0x1e13:
+ regmbc('d'); regmbc(0x10f); regmbc(0x111);
+ regmbc(0x257); regmbc(0x1d6d); regmbc(0x1d81);
+ regmbc(0x1d91); regmbc(0x1e0b); regmbc(0x1e0d);
+ regmbc(0x1e0f); regmbc(0x1e11); regmbc(0x1e13);
+ return;
+ case 'e': case 0xe8: case 0xe9: case 0xea: case 0xeb:
+ case 0x113: case 0x115: case 0x117: case 0x119:
+ case 0x11b: case 0x205: case 0x207: case 0x229:
+ case 0x247: case 0x1d92: case 0x1e15: case 0x1e17:
+ case 0x1e19: case 0x1e1b: case 0x1eb9: case 0x1ebb:
+ case 0x1e1d: case 0x1ebd: case 0x1ebf: case 0x1ec1:
+ case 0x1ec3: case 0x1ec5: case 0x1ec7:
+ regmbc('e'); regmbc(0xe8); regmbc(0xe9);
+ regmbc(0xea); regmbc(0xeb); regmbc(0x113);
+ regmbc(0x115); regmbc(0x117); regmbc(0x119);
+ regmbc(0x11b); regmbc(0x205); regmbc(0x207);
+ regmbc(0x229); regmbc(0x247); regmbc(0x1d92);
+ regmbc(0x1e15); regmbc(0x1e17); regmbc(0x1e19);
+ regmbc(0x1e1b); regmbc(0x1e1d); regmbc(0x1eb9);
+ regmbc(0x1ebb); regmbc(0x1ebd); regmbc(0x1ebf);
+ regmbc(0x1ec1); regmbc(0x1ec3); regmbc(0x1ec5);
+ regmbc(0x1ec7);
+ return;
+ case 'f': case 0x192: case 0x1d6e: case 0x1d82:
+ case 0x1e1f: case 0xa799:
+ regmbc('f'); regmbc(0x192); regmbc(0x1d6e);
+ regmbc(0x1d82); regmbc(0x1e1f); regmbc(0xa799);
+ return;
+ case 'g': case 0x11d: case 0x11f: case 0x121: case 0x123:
+ case 0x1e5: case 0x1e7: case 0x260: case 0x1f5: case 0x1d83:
+ case 0x1e21: case 0xa7a1:
+ regmbc('g'); regmbc(0x11d); regmbc(0x11f);
+ regmbc(0x121); regmbc(0x123); regmbc(0x1e5);
+ regmbc(0x1e7); regmbc(0x1f5); regmbc(0x260);
+ regmbc(0x1d83); regmbc(0x1e21); regmbc(0xa7a1);
+ return;
+ case 'h': case 0x125: case 0x127: case 0x21f: case 0x1e23:
+ case 0x1e25: case 0x1e27: case 0x1e29: case 0x1e2b:
+ case 0x1e96: case 0x2c68: case 0xa795:
+ regmbc('h'); regmbc(0x125); regmbc(0x127);
+ regmbc(0x21f); regmbc(0x1e23); regmbc(0x1e25);
+ regmbc(0x1e27); regmbc(0x1e29); regmbc(0x1e2b);
+ regmbc(0x1e96); regmbc(0x2c68); regmbc(0xa795);
+ return;
+ case 'i': case 0xec: case 0xed: case 0xee: case 0xef:
+ case 0x129: case 0x12b: case 0x12d: case 0x12f:
+ case 0x1d0: case 0x209: case 0x20b: case 0x268:
+ case 0x1d96: case 0x1e2d: case 0x1e2f: case 0x1ec9:
+ case 0x1ecb:
+ regmbc('i'); regmbc(0xec); regmbc(0xed);
+ regmbc(0xee); regmbc(0xef); regmbc(0x129);
+ regmbc(0x12b); regmbc(0x12d); regmbc(0x12f);
+ regmbc(0x1d0); regmbc(0x209); regmbc(0x20b);
+ regmbc(0x268); regmbc(0x1d96); regmbc(0x1e2d);
+ regmbc(0x1e2f); regmbc(0x1ec9); regmbc(0x1ecb);
+ return;
+ case 'j': case 0x135: case 0x1f0: case 0x249:
+ regmbc('j'); regmbc(0x135); regmbc(0x1f0);
+ regmbc(0x249);
+ return;
+ case 'k': case 0x137: case 0x199: case 0x1e9:
+ case 0x1d84: case 0x1e31: case 0x1e33: case 0x1e35:
+ case 0x2c6a: case 0xa741:
+ regmbc('k'); regmbc(0x137); regmbc(0x199);
+ regmbc(0x1e9); regmbc(0x1d84); regmbc(0x1e31);
+ regmbc(0x1e33); regmbc(0x1e35); regmbc(0x2c6a);
+ regmbc(0xa741);
+ return;
+ case 'l': case 0x13a: case 0x13c: case 0x13e:
+ case 0x140: case 0x142: case 0x19a: case 0x1e37:
+ case 0x1e39: case 0x1e3b: case 0x1e3d: case 0x2c61:
+ regmbc('l'); regmbc(0x13a); regmbc(0x13c);
+ regmbc(0x13e); regmbc(0x140); regmbc(0x142);
+ regmbc(0x19a); regmbc(0x1e37); regmbc(0x1e39);
+ regmbc(0x1e3b); regmbc(0x1e3d); regmbc(0x2c61);
+ return;
+ case 'm': case 0x1d6f: case 0x1e3f: case 0x1e41: case 0x1e43:
+ regmbc('m'); regmbc(0x1d6f); regmbc(0x1e3f);
+ regmbc(0x1e41); regmbc(0x1e43);
+ return;
+ case 'n': case 0xf1: case 0x144: case 0x146: case 0x148:
+ case 0x149: case 0x1f9: case 0x1d70: case 0x1d87:
+ case 0x1e45: case 0x1e47: case 0x1e49: case 0x1e4b:
+ case 0xa7a5:
+ regmbc('n'); regmbc(0xf1); regmbc(0x144);
+ regmbc(0x146); regmbc(0x148); regmbc(0x149);
+ regmbc(0x1f9); regmbc(0x1d70); regmbc(0x1d87);
+ regmbc(0x1e45); regmbc(0x1e47); regmbc(0x1e49);
+ regmbc(0x1e4b); regmbc(0xa7a5);
+ return;
+ case 'o': case 0xf2: case 0xf3: case 0xf4: case 0xf5:
+ case 0xf6: case 0xf8: case 0x14d: case 0x14f: case 0x151:
+ case 0x1a1: case 0x1d2: case 0x1eb: case 0x1ed: case 0x1ff:
+ case 0x20d: case 0x20f: case 0x22b: case 0x22d: case 0x22f:
+ case 0x231: case 0x275: case 0x1e4d: case 0x1e4f:
+ case 0x1e51: case 0x1e53: case 0x1ecd: case 0x1ecf:
+ case 0x1ed1: case 0x1ed3: case 0x1ed5: case 0x1ed7:
+ case 0x1ed9: case 0x1edb: case 0x1edd: case 0x1edf:
+ case 0x1ee1: case 0x1ee3:
+ regmbc('o'); regmbc(0xf2); regmbc(0xf3);
+ regmbc(0xf4); regmbc(0xf5); regmbc(0xf6);
+ regmbc(0xf8); regmbc(0x14d); regmbc(0x14f);
+ regmbc(0x151); regmbc(0x1a1); regmbc(0x1d2);
+ regmbc(0x1eb); regmbc(0x1ed); regmbc(0x1ff);
+ regmbc(0x20d); regmbc(0x20f); regmbc(0x22b);
+ regmbc(0x22d); regmbc(0x22f); regmbc(0x231);
+ regmbc(0x275); regmbc(0x1e4d); regmbc(0x1e4f);
+ regmbc(0x1e51); regmbc(0x1e53); regmbc(0x1ecd);
+ regmbc(0x1ecf); regmbc(0x1ed1); regmbc(0x1ed3);
+ regmbc(0x1ed5); regmbc(0x1ed7); regmbc(0x1ed9);
+ regmbc(0x1edb); regmbc(0x1edd); regmbc(0x1edf);
+ regmbc(0x1ee1); regmbc(0x1ee3);
+ return;
+ case 'p': case 0x1a5: case 0x1d71: case 0x1d88: case 0x1d7d:
+ case 0x1e55: case 0x1e57:
+ regmbc('p'); regmbc(0x1a5); regmbc(0x1d71);
+ regmbc(0x1d7d); regmbc(0x1d88); regmbc(0x1e55);
+ regmbc(0x1e57);
+ return;
+ case 'q': case 0x24b: case 0x2a0:
+ regmbc('q'); regmbc(0x24b); regmbc(0x2a0);
+ return;
+ case 'r': case 0x155: case 0x157: case 0x159: case 0x211:
+ case 0x213: case 0x24d: case 0x27d: case 0x1d72: case 0x1d73:
+ case 0x1d89: case 0x1e59: case 0x1e5b: case 0x1e5d: case 0x1e5f:
+ case 0xa7a7:
+ regmbc('r'); regmbc(0x155); regmbc(0x157);
+ regmbc(0x159); regmbc(0x211); regmbc(0x213);
+ regmbc(0x24d); regmbc(0x1d72); regmbc(0x1d73);
+ regmbc(0x1d89); regmbc(0x1e59); regmbc(0x27d);
+ regmbc(0x1e5b); regmbc(0x1e5d); regmbc(0x1e5f);
+ regmbc(0xa7a7);
+ return;
+ case 's': case 0x15b: case 0x15d: case 0x15f: case 0x161:
+ case 0x1e61: case 0x219: case 0x23f: case 0x1d74: case 0x1d8a:
+ case 0x1e63: case 0x1e65: case 0x1e67: case 0x1e69: case 0xa7a9:
+ regmbc('s'); regmbc(0x15b); regmbc(0x15d);
+ regmbc(0x15f); regmbc(0x161); regmbc(0x23f);
+ regmbc(0x219); regmbc(0x1d74); regmbc(0x1d8a);
+ regmbc(0x1e61); regmbc(0x1e63); regmbc(0x1e65);
+ regmbc(0x1e67); regmbc(0x1e69); regmbc(0xa7a9);
+ return;
+ case 't': case 0x163: case 0x165: case 0x167: case 0x1ab:
+ case 0x1ad: case 0x21b: case 0x288: case 0x1d75: case 0x1e6b:
+ case 0x1e6d: case 0x1e6f: case 0x1e71: case 0x1e97: case 0x2c66:
+ regmbc('t'); regmbc(0x163); regmbc(0x165);
+ regmbc(0x167); regmbc(0x1ab); regmbc(0x21b);
+ regmbc(0x1ad); regmbc(0x288); regmbc(0x1d75);
+ regmbc(0x1e6b); regmbc(0x1e6d); regmbc(0x1e6f);
+ regmbc(0x1e71); regmbc(0x1e97); regmbc(0x2c66);
+ return;
+ case 'u': case 0xf9: case 0xfa: case 0xfb: case 0xfc:
+ case 0x169: case 0x16b: case 0x16d: case 0x16f:
+ case 0x171: case 0x173: case 0x1b0: case 0x1d4:
+ case 0x1d6: case 0x1d8: case 0x1da: case 0x1dc:
+ case 0x215: case 0x217: case 0x289: case 0x1e73:
+ case 0x1d7e: case 0x1d99: case 0x1e75: case 0x1e77:
+ case 0x1e79: case 0x1e7b: case 0x1ee5: case 0x1ee7:
+ case 0x1ee9: case 0x1eeb: case 0x1eed: case 0x1eef:
+ case 0x1ef1:
+ regmbc('u'); regmbc(0xf9); regmbc(0xfa);
+ regmbc(0xfb); regmbc(0xfc); regmbc(0x169);
+ regmbc(0x16b); regmbc(0x16d); regmbc(0x16f);
+ regmbc(0x171); regmbc(0x173); regmbc(0x1d6);
+ regmbc(0x1d8); regmbc(0x1da); regmbc(0x1dc);
+ regmbc(0x215); regmbc(0x217); regmbc(0x1b0);
+ regmbc(0x1d4); regmbc(0x289); regmbc(0x1d7e);
+ regmbc(0x1d99); regmbc(0x1e73); regmbc(0x1e75);
+ regmbc(0x1e77); regmbc(0x1e79); regmbc(0x1e7b);
+ regmbc(0x1ee5); regmbc(0x1ee7); regmbc(0x1ee9);
+ regmbc(0x1eeb); regmbc(0x1eed); regmbc(0x1eef);
+ regmbc(0x1ef1);
+ return;
+ case 'v': case 0x28b: case 0x1d8c: case 0x1e7d: case 0x1e7f:
+ regmbc('v'); regmbc(0x28b); regmbc(0x1d8c);
+ regmbc(0x1e7d); regmbc(0x1e7f);
+ return;
+ case 'w': case 0x175: case 0x1e81: case 0x1e83:
+ case 0x1e85: case 0x1e87: case 0x1e89: case 0x1e98:
+ regmbc('w'); regmbc(0x175); regmbc(0x1e81);
+ regmbc(0x1e83); regmbc(0x1e85); regmbc(0x1e87);
+ regmbc(0x1e89); regmbc(0x1e98);
+ return;
+ case 'x': case 0x1e8b: case 0x1e8d:
+ regmbc('x'); regmbc(0x1e8b); regmbc(0x1e8d);
+ return;
+ case 'y': case 0xfd: case 0xff: case 0x177: case 0x1b4:
+ case 0x233: case 0x24f: case 0x1e8f: case 0x1e99: case 0x1ef3:
+ case 0x1ef5: case 0x1ef7: case 0x1ef9:
+ regmbc('y'); regmbc(0xfd); regmbc(0xff);
+ regmbc(0x177); regmbc(0x1b4); regmbc(0x233);
+ regmbc(0x24f); regmbc(0x1e8f); regmbc(0x1e99);
+ regmbc(0x1ef3); regmbc(0x1ef5); regmbc(0x1ef7);
+ regmbc(0x1ef9);
+ return;
+ case 'z': case 0x17a: case 0x17c: case 0x17e: case 0x1b6:
+ case 0x1d76: case 0x1d8e: case 0x1e91: case 0x1e93:
+ case 0x1e95: case 0x2c6c:
+ regmbc('z'); regmbc(0x17a); regmbc(0x17c);
+ regmbc(0x17e); regmbc(0x1b6); regmbc(0x1d76);
+ regmbc(0x1d8e); regmbc(0x1e91); regmbc(0x1e93);
+ regmbc(0x1e95); regmbc(0x2c6c);
+ return;
+ }
+ }
+ regmbc(c);
+}
+
+/*
+ * Emit a node.
+ * Return pointer to generated code.
+ */
+ static char_u *
+regnode(int op)
+{
+ char_u *ret;
+
+ ret = regcode;
+ if (ret == JUST_CALC_SIZE)
+ regsize += 3;
+ else
+ {
+ *regcode++ = op;
+ *regcode++ = NUL; // Null "next" pointer.
+ *regcode++ = NUL;
+ }
+ return ret;
+}
+
+/*
+ * Write a long as four bytes at "p" and return pointer to the next char.
+ */
+ static char_u *
+re_put_long(char_u *p, long_u val)
+{
+ *p++ = (char_u) ((val >> 24) & 0377);
+ *p++ = (char_u) ((val >> 16) & 0377);
+ *p++ = (char_u) ((val >> 8) & 0377);
+ *p++ = (char_u) (val & 0377);
+ return p;
+}
+
+/*
+ * regnext - dig the "next" pointer out of a node
+ * Returns NULL when calculating size, when there is no next item and when
+ * there is an error.
+ */
+ static char_u *
+regnext(char_u *p)
+{
+ int offset;
+
+ if (p == JUST_CALC_SIZE || reg_toolong)
+ return NULL;
+
+ offset = NEXT(p);
+ if (offset == 0)
+ return NULL;
+
+ if (OP(p) == BACK)
+ return p - offset;
+ else
+ return p + offset;
+}
+
+/*
+ * Set the next-pointer at the end of a node chain.
+ */
+ static void
+regtail(char_u *p, char_u *val)
+{
+ char_u *scan;
+ char_u *temp;
+ int offset;
+
+ if (p == JUST_CALC_SIZE)
+ return;
+
+ // Find last node.
+ scan = p;
+ for (;;)
+ {
+ temp = regnext(scan);
+ if (temp == NULL)
+ break;
+ scan = temp;
+ }
+
+ if (OP(scan) == BACK)
+ offset = (int)(scan - val);
+ else
+ offset = (int)(val - scan);
+ // When the offset uses more than 16 bits it can no longer fit in the two
+ // bytes available. Use a global flag to avoid having to check return
+ // values in too many places.
+ if (offset > 0xffff)
+ reg_toolong = TRUE;
+ else
+ {
+ *(scan + 1) = (char_u) (((unsigned)offset >> 8) & 0377);
+ *(scan + 2) = (char_u) (offset & 0377);
+ }
+}
+
+/*
+ * Like regtail, on item after a BRANCH; nop if none.
+ */
+ static void
+regoptail(char_u *p, char_u *val)
+{
+ // When op is neither BRANCH nor BRACE_COMPLEX0-9, it is "operandless"
+ if (p == NULL || p == JUST_CALC_SIZE
+ || (OP(p) != BRANCH
+ && (OP(p) < BRACE_COMPLEX || OP(p) > BRACE_COMPLEX + 9)))
+ return;
+ regtail(OPERAND(p), val);
+}
+
+/*
+ * Insert an operator in front of already-emitted operand
+ *
+ * Means relocating the operand.
+ */
+ static void
+reginsert(int op, char_u *opnd)
+{
+ char_u *src;
+ char_u *dst;
+ char_u *place;
+
+ if (regcode == JUST_CALC_SIZE)
+ {
+ regsize += 3;
+ return;
+ }
+ src = regcode;
+ regcode += 3;
+ dst = regcode;
+ while (src > opnd)
+ *--dst = *--src;
+
+ place = opnd; // Op node, where operand used to be.
+ *place++ = op;
+ *place++ = NUL;
+ *place = NUL;
+}
+
+/*
+ * Insert an operator in front of already-emitted operand.
+ * Add a number to the operator.
+ */
+ static void
+reginsert_nr(int op, long val, char_u *opnd)
+{
+ char_u *src;
+ char_u *dst;
+ char_u *place;
+
+ if (regcode == JUST_CALC_SIZE)
+ {
+ regsize += 7;
+ return;
+ }
+ src = regcode;
+ regcode += 7;
+ dst = regcode;
+ while (src > opnd)
+ *--dst = *--src;
+
+ place = opnd; // Op node, where operand used to be.
+ *place++ = op;
+ *place++ = NUL;
+ *place++ = NUL;
+ re_put_long(place, (long_u)val);
+}
+
+/*
+ * Insert an operator in front of already-emitted operand.
+ * The operator has the given limit values as operands. Also set next pointer.
+ *
+ * Means relocating the operand.
+ */
+ static void
+reginsert_limits(
+ int op,
+ long minval,
+ long maxval,
+ char_u *opnd)
+{
+ char_u *src;
+ char_u *dst;
+ char_u *place;
+
+ if (regcode == JUST_CALC_SIZE)
+ {
+ regsize += 11;
+ return;
+ }
+ src = regcode;
+ regcode += 11;
+ dst = regcode;
+ while (src > opnd)
+ *--dst = *--src;
+
+ place = opnd; // Op node, where operand used to be.
+ *place++ = op;
+ *place++ = NUL;
+ *place++ = NUL;
+ place = re_put_long(place, (long_u)minval);
+ place = re_put_long(place, (long_u)maxval);
+ regtail(opnd, place);
+}
+
+/*
+ * Return TRUE if the back reference is legal. We must have seen the close
+ * brace.
+ * TODO: Should also check that we don't refer to something that is repeated
+ * (+*=): what instance of the repetition should we match?
+ */
+ static int
+seen_endbrace(int refnum)
+{
+ if (!had_endbrace[refnum])
+ {
+ char_u *p;
+
+ // Trick: check if "@<=" or "@<!" follows, in which case
+ // the \1 can appear before the referenced match.
+ for (p = regparse; *p != NUL; ++p)
+ if (p[0] == '@' && p[1] == '<' && (p[2] == '!' || p[2] == '='))
+ break;
+ if (*p == NUL)
+ {
+ emsg(_(e_illegal_back_reference));
+ rc_did_emsg = TRUE;
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+
+/*
+ * Parse the lowest level.
+ *
+ * Optimization: gobbles an entire sequence of ordinary characters so that
+ * it can turn them into a single node, which is smaller to store and
+ * faster to run. Don't do this when one_exactly is set.
+ */
+ static char_u *
+regatom(int *flagp)
+{
+ char_u *ret;
+ int flags;
+ int c;
+ char_u *p;
+ int extra = 0;
+ int save_prev_at_start = prev_at_start;
+
+ *flagp = WORST; // Tentatively.
+
+ c = getchr();
+ switch (c)
+ {
+ case Magic('^'):
+ ret = regnode(BOL);
+ break;
+
+ case Magic('$'):
+ ret = regnode(EOL);
+#if defined(FEAT_SYN_HL) || defined(PROTO)
+ had_eol = TRUE;
+#endif
+ break;
+
+ case Magic('<'):
+ ret = regnode(BOW);
+ break;
+
+ case Magic('>'):
+ ret = regnode(EOW);
+ break;
+
+ case Magic('_'):
+ c = no_Magic(getchr());
+ if (c == '^') // "\_^" is start-of-line
+ {
+ ret = regnode(BOL);
+ break;
+ }
+ if (c == '$') // "\_$" is end-of-line
+ {
+ ret = regnode(EOL);
+#if defined(FEAT_SYN_HL) || defined(PROTO)
+ had_eol = TRUE;
+#endif
+ break;
+ }
+
+ extra = ADD_NL;
+ *flagp |= HASNL;
+
+ // "\_[" is character range plus newline
+ if (c == '[')
+ goto collection;
+
+ // "\_x" is character class plus newline
+ // FALLTHROUGH
+
+ // Character classes.
+ case Magic('.'):
+ case Magic('i'):
+ case Magic('I'):
+ case Magic('k'):
+ case Magic('K'):
+ case Magic('f'):
+ case Magic('F'):
+ case Magic('p'):
+ case Magic('P'):
+ case Magic('s'):
+ case Magic('S'):
+ case Magic('d'):
+ case Magic('D'):
+ case Magic('x'):
+ case Magic('X'):
+ case Magic('o'):
+ case Magic('O'):
+ case Magic('w'):
+ case Magic('W'):
+ case Magic('h'):
+ case Magic('H'):
+ case Magic('a'):
+ case Magic('A'):
+ case Magic('l'):
+ case Magic('L'):
+ case Magic('u'):
+ case Magic('U'):
+ p = vim_strchr(classchars, no_Magic(c));
+ if (p == NULL)
+ EMSG_RET_NULL(_(e_invalid_use_of_underscore));
+
+ // When '.' is followed by a composing char ignore the dot, so that
+ // the composing char is matched here.
+ if (enc_utf8 && c == Magic('.') && utf_iscomposing(peekchr()))
+ {
+ c = getchr();
+ goto do_multibyte;
+ }
+ ret = regnode(classcodes[p - classchars] + extra);
+ *flagp |= HASWIDTH | SIMPLE;
+ break;
+
+ case Magic('n'):
+ if (reg_string)
+ {
+ // In a string "\n" matches a newline character.
+ ret = regnode(EXACTLY);
+ regc(NL);
+ regc(NUL);
+ *flagp |= HASWIDTH | SIMPLE;
+ }
+ else
+ {
+ // In buffer text "\n" matches the end of a line.
+ ret = regnode(NEWL);
+ *flagp |= HASWIDTH | HASNL;
+ }
+ break;
+
+ case Magic('('):
+ if (one_exactly)
+ EMSG_ONE_RET_NULL;
+ ret = reg(REG_PAREN, &flags);
+ if (ret == NULL)
+ return NULL;
+ *flagp |= flags & (HASWIDTH | SPSTART | HASNL | HASLOOKBH);
+ break;
+
+ case NUL:
+ case Magic('|'):
+ case Magic('&'):
+ case Magic(')'):
+ if (one_exactly)
+ EMSG_ONE_RET_NULL;
+ // Supposed to be caught earlier.
+ IEMSG_RET_NULL(e_internal_error_in_regexp);
+ // NOTREACHED
+
+ case Magic('='):
+ case Magic('?'):
+ case Magic('+'):
+ case Magic('@'):
+ case Magic('{'):
+ case Magic('*'):
+ c = no_Magic(c);
+ EMSG3_RET_NULL(_(e_str_chr_follows_nothing),
+ (c == '*' ? reg_magic >= MAGIC_ON : reg_magic == MAGIC_ALL), c);
+ // NOTREACHED
+
+ case Magic('~'): // previous substitute pattern
+ if (reg_prev_sub != NULL)
+ {
+ char_u *lp;
+
+ ret = regnode(EXACTLY);
+ lp = reg_prev_sub;
+ while (*lp != NUL)
+ regc(*lp++);
+ regc(NUL);
+ if (*reg_prev_sub != NUL)
+ {
+ *flagp |= HASWIDTH;
+ if ((lp - reg_prev_sub) == 1)
+ *flagp |= SIMPLE;
+ }
+ }
+ else
+ EMSG_RET_NULL(_(e_no_previous_substitute_regular_expression));
+ break;
+
+ case Magic('1'):
+ case Magic('2'):
+ case Magic('3'):
+ case Magic('4'):
+ case Magic('5'):
+ case Magic('6'):
+ case Magic('7'):
+ case Magic('8'):
+ case Magic('9'):
+ {
+ int refnum;
+
+ refnum = c - Magic('0');
+ if (!seen_endbrace(refnum))
+ return NULL;
+ ret = regnode(BACKREF + refnum);
+ }
+ break;
+
+ case Magic('z'):
+ {
+ c = no_Magic(getchr());
+ switch (c)
+ {
+#ifdef FEAT_SYN_HL
+ case '(': if ((reg_do_extmatch & REX_SET) == 0)
+ EMSG_RET_NULL(_(e_z_not_allowed_here));
+ if (one_exactly)
+ EMSG_ONE_RET_NULL;
+ ret = reg(REG_ZPAREN, &flags);
+ if (ret == NULL)
+ return NULL;
+ *flagp |= flags & (HASWIDTH|SPSTART|HASNL|HASLOOKBH);
+ re_has_z = REX_SET;
+ break;
+
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9': if ((reg_do_extmatch & REX_USE) == 0)
+ EMSG_RET_NULL(_(e_z1_z9_not_allowed_here));
+ ret = regnode(ZREF + c - '0');
+ re_has_z = REX_USE;
+ break;
+#endif
+
+ case 's': ret = regnode(MOPEN + 0);
+ if (re_mult_next("\\zs") == FAIL)
+ return NULL;
+ break;
+
+ case 'e': ret = regnode(MCLOSE + 0);
+ if (re_mult_next("\\ze") == FAIL)
+ return NULL;
+ break;
+
+ default: EMSG_RET_NULL(_(e_invalid_character_after_bsl_z));
+ }
+ }
+ break;
+
+ case Magic('%'):
+ {
+ c = no_Magic(getchr());
+ switch (c)
+ {
+ // () without a back reference
+ case '(':
+ if (one_exactly)
+ EMSG_ONE_RET_NULL;
+ ret = reg(REG_NPAREN, &flags);
+ if (ret == NULL)
+ return NULL;
+ *flagp |= flags & (HASWIDTH | SPSTART | HASNL | HASLOOKBH);
+ break;
+
+ // Catch \%^ and \%$ regardless of where they appear in the
+ // pattern -- regardless of whether or not it makes sense.
+ case '^':
+ ret = regnode(RE_BOF);
+ break;
+
+ case '$':
+ ret = regnode(RE_EOF);
+ break;
+
+ case '#':
+ if (regparse[0] == '=' && regparse[1] >= 48
+ && regparse[1] <= 50)
+ {
+ // misplaced \%#=1
+ semsg(_(e_atom_engine_must_be_at_start_of_pattern),
+ regparse[1]);
+ return FAIL;
+ }
+ ret = regnode(CURSOR);
+ break;
+
+ case 'V':
+ ret = regnode(RE_VISUAL);
+ break;
+
+ case 'C':
+ ret = regnode(RE_COMPOSING);
+ break;
+
+ // \%[abc]: Emit as a list of branches, all ending at the last
+ // branch which matches nothing.
+ case '[':
+ if (one_exactly) // doesn't nest
+ EMSG_ONE_RET_NULL;
+ {
+ char_u *lastbranch;
+ char_u *lastnode = NULL;
+ char_u *br;
+
+ ret = NULL;
+ while ((c = getchr()) != ']')
+ {
+ if (c == NUL)
+ EMSG2_RET_NULL(_(e_missing_sb_after_str),
+ reg_magic == MAGIC_ALL);
+ br = regnode(BRANCH);
+ if (ret == NULL)
+ ret = br;
+ else
+ {
+ regtail(lastnode, br);
+ if (reg_toolong)
+ return NULL;
+ }
+
+ ungetchr();
+ one_exactly = TRUE;
+ lastnode = regatom(flagp);
+ one_exactly = FALSE;
+ if (lastnode == NULL)
+ return NULL;
+ }
+ if (ret == NULL)
+ EMSG2_RET_NULL(_(e_empty_str_brackets),
+ reg_magic == MAGIC_ALL);
+ lastbranch = regnode(BRANCH);
+ br = regnode(NOTHING);
+ if (ret != JUST_CALC_SIZE)
+ {
+ regtail(lastnode, br);
+ regtail(lastbranch, br);
+ // connect all branches to the NOTHING
+ // branch at the end
+ for (br = ret; br != lastnode; )
+ {
+ if (OP(br) == BRANCH)
+ {
+ regtail(br, lastbranch);
+ if (reg_toolong)
+ return NULL;
+ br = OPERAND(br);
+ }
+ else
+ br = regnext(br);
+ }
+ }
+ *flagp &= ~(HASWIDTH | SIMPLE);
+ break;
+ }
+
+ case 'd': // %d123 decimal
+ case 'o': // %o123 octal
+ case 'x': // %xab hex 2
+ case 'u': // %uabcd hex 4
+ case 'U': // %U1234abcd hex 8
+ {
+ long i;
+
+ switch (c)
+ {
+ case 'd': i = getdecchrs(); break;
+ case 'o': i = getoctchrs(); break;
+ case 'x': i = gethexchrs(2); break;
+ case 'u': i = gethexchrs(4); break;
+ case 'U': i = gethexchrs(8); break;
+ default: i = -1; break;
+ }
+
+ if (i < 0 || i > INT_MAX)
+ EMSG2_RET_NULL(
+ _(e_invalid_character_after_str_2),
+ reg_magic == MAGIC_ALL);
+ if (use_multibytecode(i))
+ ret = regnode(MULTIBYTECODE);
+ else
+ ret = regnode(EXACTLY);
+ if (i == 0)
+ regc(0x0a);
+ else
+ regmbc(i);
+ regc(NUL);
+ *flagp |= HASWIDTH;
+ break;
+ }
+
+ default:
+ if (VIM_ISDIGIT(c) || c == '<' || c == '>'
+ || c == '\'' || c == '.')
+ {
+ long_u n = 0;
+ int cmp;
+ int cur = FALSE;
+ int got_digit = FALSE;
+
+ cmp = c;
+ if (cmp == '<' || cmp == '>')
+ c = getchr();
+ if (no_Magic(c) == '.')
+ {
+ cur = TRUE;
+ c = getchr();
+ }
+ while (VIM_ISDIGIT(c))
+ {
+ got_digit = TRUE;
+ n = n * 10 + (c - '0');
+ c = getchr();
+ }
+ if (c == '\'' && n == 0)
+ {
+ // "\%'m", "\%<'m" and "\%>'m": Mark
+ c = getchr();
+ ret = regnode(RE_MARK);
+ if (ret == JUST_CALC_SIZE)
+ regsize += 2;
+ else
+ {
+ *regcode++ = c;
+ *regcode++ = cmp;
+ }
+ break;
+ }
+ else if ((c == 'l' || c == 'c' || c == 'v')
+ && (cur || got_digit))
+ {
+ if (cur && n)
+ {
+ semsg(_(e_regexp_number_after_dot_pos_search_chr),
+ no_Magic(c));
+ rc_did_emsg = TRUE;
+ return NULL;
+ }
+ if (c == 'l')
+ {
+ if (cur)
+ n = curwin->w_cursor.lnum;
+ ret = regnode(RE_LNUM);
+ if (save_prev_at_start)
+ at_start = TRUE;
+ }
+ else if (c == 'c')
+ {
+ if (cur)
+ {
+ n = curwin->w_cursor.col;
+ n++;
+ }
+ ret = regnode(RE_COL);
+ }
+ else
+ {
+ if (cur)
+ {
+ colnr_T vcol = 0;
+
+ getvvcol(curwin, &curwin->w_cursor,
+ NULL, NULL, &vcol);
+ ++vcol;
+ n = vcol;
+ }
+ ret = regnode(RE_VCOL);
+ }
+ if (ret == JUST_CALC_SIZE)
+ regsize += 5;
+ else
+ {
+ // put the number and the optional
+ // comparator after the opcode
+ regcode = re_put_long(regcode, n);
+ *regcode++ = cmp;
+ }
+ break;
+ }
+ }
+
+ EMSG2_RET_NULL(_(e_invalid_character_after_str),
+ reg_magic == MAGIC_ALL);
+ }
+ }
+ break;
+
+ case Magic('['):
+collection:
+ {
+ char_u *lp;
+
+ // If there is no matching ']', we assume the '[' is a normal
+ // character. This makes 'incsearch' and ":help [" work.
+ lp = skip_anyof(regparse);
+ if (*lp == ']') // there is a matching ']'
+ {
+ int startc = -1; // > 0 when next '-' is a range
+ int endc;
+
+ // In a character class, different parsing rules apply.
+ // Not even \ is special anymore, nothing is.
+ if (*regparse == '^') // Complement of range.
+ {
+ ret = regnode(ANYBUT + extra);
+ regparse++;
+ }
+ else
+ ret = regnode(ANYOF + extra);
+
+ // At the start ']' and '-' mean the literal character.
+ if (*regparse == ']' || *regparse == '-')
+ {
+ startc = *regparse;
+ regc(*regparse++);
+ }
+
+ while (*regparse != NUL && *regparse != ']')
+ {
+ if (*regparse == '-')
+ {
+ ++regparse;
+ // The '-' is not used for a range at the end and
+ // after or before a '\n'.
+ if (*regparse == ']' || *regparse == NUL
+ || startc == -1
+ || (regparse[0] == '\\' && regparse[1] == 'n'))
+ {
+ regc('-');
+ startc = '-'; // [--x] is a range
+ }
+ else
+ {
+ // Also accept "a-[.z.]"
+ endc = 0;
+ if (*regparse == '[')
+ endc = get_coll_element(&regparse);
+ if (endc == 0)
+ {
+ if (has_mbyte)
+ endc = mb_ptr2char_adv(&regparse);
+ else
+ endc = *regparse++;
+ }
+
+ // Handle \o40, \x20 and \u20AC style sequences
+ if (endc == '\\' && !reg_cpo_lit && !reg_cpo_bsl)
+ endc = coll_get_char();
+
+ if (startc > endc)
+ EMSG_RET_NULL(_(e_reverse_range_in_character_class));
+ if (has_mbyte && ((*mb_char2len)(startc) > 1
+ || (*mb_char2len)(endc) > 1))
+ {
+ // Limit to a range of 256 chars.
+ if (endc > startc + 256)
+ EMSG_RET_NULL(_(e_range_too_large_in_character_class));
+ while (++startc <= endc)
+ regmbc(startc);
+ }
+ else
+ {
+ while (++startc <= endc)
+ regc(startc);
+ }
+ startc = -1;
+ }
+ }
+ // Only "\]", "\^", "\]" and "\\" are special in Vi. Vim
+ // accepts "\t", "\e", etc., but only when the 'l' flag in
+ // 'cpoptions' is not included.
+ // Posix doesn't recognize backslash at all.
+ else if (*regparse == '\\'
+ && !reg_cpo_bsl
+ && (vim_strchr(REGEXP_INRANGE, regparse[1]) != NULL
+ || (!reg_cpo_lit
+ && vim_strchr(REGEXP_ABBR,
+ regparse[1]) != NULL)))
+ {
+ regparse++;
+ if (*regparse == 'n')
+ {
+ // '\n' in range: also match NL
+ if (ret != JUST_CALC_SIZE)
+ {
+ // Using \n inside [^] does not change what
+ // matches. "[^\n]" is the same as ".".
+ if (*ret == ANYOF)
+ {
+ *ret = ANYOF + ADD_NL;
+ *flagp |= HASNL;
+ }
+ // else: must have had a \n already
+ }
+ regparse++;
+ startc = -1;
+ }
+ else if (*regparse == 'd'
+ || *regparse == 'o'
+ || *regparse == 'x'
+ || *regparse == 'u'
+ || *regparse == 'U')
+ {
+ startc = coll_get_char();
+ if (startc == 0)
+ regc(0x0a);
+ else
+ regmbc(startc);
+ }
+ else
+ {
+ startc = backslash_trans(*regparse++);
+ regc(startc);
+ }
+ }
+ else if (*regparse == '[')
+ {
+ int c_class;
+ int cu;
+
+ c_class = get_char_class(&regparse);
+ startc = -1;
+ // Characters assumed to be 8 bits!
+ switch (c_class)
+ {
+ case CLASS_NONE:
+ c_class = get_equi_class(&regparse);
+ if (c_class != 0)
+ {
+ // produce equivalence class
+ reg_equi_class(c_class);
+ }
+ else if ((c_class =
+ get_coll_element(&regparse)) != 0)
+ {
+ // produce a collating element
+ regmbc(c_class);
+ }
+ else
+ {
+ // literal '[', allow [[-x] as a range
+ startc = *regparse++;
+ regc(startc);
+ }
+ break;
+ case CLASS_ALNUM:
+ for (cu = 1; cu < 128; cu++)
+ if (isalnum(cu))
+ regmbc(cu);
+ break;
+ case CLASS_ALPHA:
+ for (cu = 1; cu < 128; cu++)
+ if (isalpha(cu))
+ regmbc(cu);
+ break;
+ case CLASS_BLANK:
+ regc(' ');
+ regc('\t');
+ break;
+ case CLASS_CNTRL:
+ for (cu = 1; cu <= 127; cu++)
+ if (iscntrl(cu))
+ regmbc(cu);
+ break;
+ case CLASS_DIGIT:
+ for (cu = 1; cu <= 127; cu++)
+ if (VIM_ISDIGIT(cu))
+ regmbc(cu);
+ break;
+ case CLASS_GRAPH:
+ for (cu = 1; cu <= 127; cu++)
+ if (isgraph(cu))
+ regmbc(cu);
+ break;
+ case CLASS_LOWER:
+ for (cu = 1; cu <= 255; cu++)
+ if (MB_ISLOWER(cu) && cu != 170
+ && cu != 186)
+ regmbc(cu);
+ break;
+ case CLASS_PRINT:
+ for (cu = 1; cu <= 255; cu++)
+ if (vim_isprintc(cu))
+ regmbc(cu);
+ break;
+ case CLASS_PUNCT:
+ for (cu = 1; cu < 128; cu++)
+ if (ispunct(cu))
+ regmbc(cu);
+ break;
+ case CLASS_SPACE:
+ for (cu = 9; cu <= 13; cu++)
+ regc(cu);
+ regc(' ');
+ break;
+ case CLASS_UPPER:
+ for (cu = 1; cu <= 255; cu++)
+ if (MB_ISUPPER(cu))
+ regmbc(cu);
+ break;
+ case CLASS_XDIGIT:
+ for (cu = 1; cu <= 255; cu++)
+ if (vim_isxdigit(cu))
+ regmbc(cu);
+ break;
+ case CLASS_TAB:
+ regc('\t');
+ break;
+ case CLASS_RETURN:
+ regc('\r');
+ break;
+ case CLASS_BACKSPACE:
+ regc('\b');
+ break;
+ case CLASS_ESCAPE:
+ regc('\033');
+ break;
+ case CLASS_IDENT:
+ for (cu = 1; cu <= 255; cu++)
+ if (vim_isIDc(cu))
+ regmbc(cu);
+ break;
+ case CLASS_KEYWORD:
+ for (cu = 1; cu <= 255; cu++)
+ if (reg_iswordc(cu))
+ regmbc(cu);
+ break;
+ case CLASS_FNAME:
+ for (cu = 1; cu <= 255; cu++)
+ if (vim_isfilec(cu))
+ regmbc(cu);
+ break;
+ }
+ }
+ else
+ {
+ if (has_mbyte)
+ {
+ int len;
+
+ // produce a multibyte character, including any
+ // following composing characters
+ startc = mb_ptr2char(regparse);
+ len = (*mb_ptr2len)(regparse);
+ if (enc_utf8 && utf_char2len(startc) != len)
+ startc = -1; // composing chars
+ while (--len >= 0)
+ regc(*regparse++);
+ }
+ else
+ {
+ startc = *regparse++;
+ regc(startc);
+ }
+ }
+ }
+ regc(NUL);
+ prevchr_len = 1; // last char was the ']'
+ if (*regparse != ']')
+ EMSG_RET_NULL(_(e_too_many_brackets)); // Cannot happen?
+ skipchr(); // let's be friends with the lexer again
+ *flagp |= HASWIDTH | SIMPLE;
+ break;
+ }
+ else if (reg_strict)
+ EMSG2_RET_NULL(_(e_missing_rsb_after_str_lsb),
+ reg_magic > MAGIC_OFF);
+ }
+ // FALLTHROUGH
+
+ default:
+ {
+ int len;
+
+ // A multi-byte character is handled as a separate atom if it's
+ // before a multi and when it's a composing char.
+ if (use_multibytecode(c))
+ {
+do_multibyte:
+ ret = regnode(MULTIBYTECODE);
+ regmbc(c);
+ *flagp |= HASWIDTH | SIMPLE;
+ break;
+ }
+
+ ret = regnode(EXACTLY);
+
+ // Append characters as long as:
+ // - there is no following multi, we then need the character in
+ // front of it as a single character operand
+ // - not running into a Magic character
+ // - "one_exactly" is not set
+ // But always emit at least one character. Might be a Multi,
+ // e.g., a "[" without matching "]".
+ for (len = 0; c != NUL && (len == 0
+ || (re_multi_type(peekchr()) == NOT_MULTI
+ && !one_exactly
+ && !is_Magic(c))); ++len)
+ {
+ c = no_Magic(c);
+ if (has_mbyte)
+ {
+ regmbc(c);
+ if (enc_utf8)
+ {
+ int l;
+
+ // Need to get composing character too.
+ for (;;)
+ {
+ l = utf_ptr2len(regparse);
+ if (!UTF_COMPOSINGLIKE(regparse, regparse + l))
+ break;
+ regmbc(utf_ptr2char(regparse));
+ skipchr();
+ }
+ }
+ }
+ else
+ regc(c);
+ c = getchr();
+ }
+ ungetchr();
+
+ regc(NUL);
+ *flagp |= HASWIDTH;
+ if (len == 1)
+ *flagp |= SIMPLE;
+ }
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * Parse something followed by possible [*+=].
+ *
+ * Note that the branching code sequences used for = and the general cases
+ * of * and + are somewhat optimized: they use the same NOTHING node as
+ * both the endmarker for their branch list and the body of the last branch.
+ * It might seem that this node could be dispensed with entirely, but the
+ * endmarker role is not redundant.
+ */
+ static char_u *
+regpiece(int *flagp)
+{
+ char_u *ret;
+ int op;
+ char_u *next;
+ int flags;
+ long minval;
+ long maxval;
+
+ ret = regatom(&flags);
+ if (ret == NULL)
+ return NULL;
+
+ op = peekchr();
+ if (re_multi_type(op) == NOT_MULTI)
+ {
+ *flagp = flags;
+ return ret;
+ }
+ // default flags
+ *flagp = (WORST | SPSTART | (flags & (HASNL | HASLOOKBH)));
+
+ skipchr();
+ switch (op)
+ {
+ case Magic('*'):
+ if (flags & SIMPLE)
+ reginsert(STAR, ret);
+ else
+ {
+ // Emit x* as (x&|), where & means "self".
+ reginsert(BRANCH, ret); // Either x
+ regoptail(ret, regnode(BACK)); // and loop
+ regoptail(ret, ret); // back
+ regtail(ret, regnode(BRANCH)); // or
+ regtail(ret, regnode(NOTHING)); // null.
+ }
+ break;
+
+ case Magic('+'):
+ if (flags & SIMPLE)
+ reginsert(PLUS, ret);
+ else
+ {
+ // Emit x+ as x(&|), where & means "self".
+ next = regnode(BRANCH); // Either
+ regtail(ret, next);
+ regtail(regnode(BACK), ret); // loop back
+ regtail(next, regnode(BRANCH)); // or
+ regtail(ret, regnode(NOTHING)); // null.
+ }
+ *flagp = (WORST | HASWIDTH | (flags & (HASNL | HASLOOKBH)));
+ break;
+
+ case Magic('@'):
+ {
+ int lop = END;
+ long nr;
+
+ nr = getdecchrs();
+ switch (no_Magic(getchr()))
+ {
+ case '=': lop = MATCH; break; // \@=
+ case '!': lop = NOMATCH; break; // \@!
+ case '>': lop = SUBPAT; break; // \@>
+ case '<': switch (no_Magic(getchr()))
+ {
+ case '=': lop = BEHIND; break; // \@<=
+ case '!': lop = NOBEHIND; break; // \@<!
+ }
+ }
+ if (lop == END)
+ EMSG2_RET_NULL(_(e_invalid_character_after_str_at),
+ reg_magic == MAGIC_ALL);
+ // Look behind must match with behind_pos.
+ if (lop == BEHIND || lop == NOBEHIND)
+ {
+ regtail(ret, regnode(BHPOS));
+ *flagp |= HASLOOKBH;
+ }
+ regtail(ret, regnode(END)); // operand ends
+ if (lop == BEHIND || lop == NOBEHIND)
+ {
+ if (nr < 0)
+ nr = 0; // no limit is same as zero limit
+ reginsert_nr(lop, nr, ret);
+ }
+ else
+ reginsert(lop, ret);
+ break;
+ }
+
+ case Magic('?'):
+ case Magic('='):
+ // Emit x= as (x|)
+ reginsert(BRANCH, ret); // Either x
+ regtail(ret, regnode(BRANCH)); // or
+ next = regnode(NOTHING); // null.
+ regtail(ret, next);
+ regoptail(ret, next);
+ break;
+
+ case Magic('{'):
+ if (!read_limits(&minval, &maxval))
+ return NULL;
+ if (flags & SIMPLE)
+ {
+ reginsert(BRACE_SIMPLE, ret);
+ reginsert_limits(BRACE_LIMITS, minval, maxval, ret);
+ }
+ else
+ {
+ if (num_complex_braces >= 10)
+ EMSG2_RET_NULL(_(e_too_many_complex_str_curly),
+ reg_magic == MAGIC_ALL);
+ reginsert(BRACE_COMPLEX + num_complex_braces, ret);
+ regoptail(ret, regnode(BACK));
+ regoptail(ret, ret);
+ reginsert_limits(BRACE_LIMITS, minval, maxval, ret);
+ ++num_complex_braces;
+ }
+ if (minval > 0 && maxval > 0)
+ *flagp = (HASWIDTH | (flags & (HASNL | HASLOOKBH)));
+ break;
+ }
+ if (re_multi_type(peekchr()) != NOT_MULTI)
+ {
+ // Can't have a multi follow a multi.
+ if (peekchr() == Magic('*'))
+ EMSG2_RET_NULL(_(e_nested_str), reg_magic >= MAGIC_ON);
+ EMSG3_RET_NULL(_(e_nested_str_chr), reg_magic == MAGIC_ALL,
+ no_Magic(peekchr()));
+ }
+
+ return ret;
+}
+
+/*
+ * Parse one alternative of an | or & operator.
+ * Implements the concatenation operator.
+ */
+ static char_u *
+regconcat(int *flagp)
+{
+ char_u *first = NULL;
+ char_u *chain = NULL;
+ char_u *latest;
+ int flags;
+ int cont = TRUE;
+
+ *flagp = WORST; // Tentatively.
+
+ while (cont)
+ {
+ switch (peekchr())
+ {
+ case NUL:
+ case Magic('|'):
+ case Magic('&'):
+ case Magic(')'):
+ cont = FALSE;
+ break;
+ case Magic('Z'):
+ regflags |= RF_ICOMBINE;
+ skipchr_keepstart();
+ break;
+ case Magic('c'):
+ regflags |= RF_ICASE;
+ skipchr_keepstart();
+ break;
+ case Magic('C'):
+ regflags |= RF_NOICASE;
+ skipchr_keepstart();
+ break;
+ case Magic('v'):
+ reg_magic = MAGIC_ALL;
+ skipchr_keepstart();
+ curchr = -1;
+ break;
+ case Magic('m'):
+ reg_magic = MAGIC_ON;
+ skipchr_keepstart();
+ curchr = -1;
+ break;
+ case Magic('M'):
+ reg_magic = MAGIC_OFF;
+ skipchr_keepstart();
+ curchr = -1;
+ break;
+ case Magic('V'):
+ reg_magic = MAGIC_NONE;
+ skipchr_keepstart();
+ curchr = -1;
+ break;
+ default:
+ latest = regpiece(&flags);
+ if (latest == NULL || reg_toolong)
+ return NULL;
+ *flagp |= flags & (HASWIDTH | HASNL | HASLOOKBH);
+ if (chain == NULL) // First piece.
+ *flagp |= flags & SPSTART;
+ else
+ regtail(chain, latest);
+ chain = latest;
+ if (first == NULL)
+ first = latest;
+ break;
+ }
+ }
+ if (first == NULL) // Loop ran zero times.
+ first = regnode(NOTHING);
+ return first;
+}
+
+/*
+ * Parse one alternative of an | operator.
+ * Implements the & operator.
+ */
+ static char_u *
+regbranch(int *flagp)
+{
+ char_u *ret;
+ char_u *chain = NULL;
+ char_u *latest;
+ int flags;
+
+ *flagp = WORST | HASNL; // Tentatively.
+
+ ret = regnode(BRANCH);
+ for (;;)
+ {
+ latest = regconcat(&flags);
+ if (latest == NULL)
+ return NULL;
+ // If one of the branches has width, the whole thing has. If one of
+ // the branches anchors at start-of-line, the whole thing does.
+ // If one of the branches uses look-behind, the whole thing does.
+ *flagp |= flags & (HASWIDTH | SPSTART | HASLOOKBH);
+ // If one of the branches doesn't match a line-break, the whole thing
+ // doesn't.
+ *flagp &= ~HASNL | (flags & HASNL);
+ if (chain != NULL)
+ regtail(chain, latest);
+ if (peekchr() != Magic('&'))
+ break;
+ skipchr();
+ regtail(latest, regnode(END)); // operand ends
+ if (reg_toolong)
+ break;
+ reginsert(MATCH, latest);
+ chain = latest;
+ }
+
+ return ret;
+}
+
+/*
+ * Parse regular expression, i.e. main body or parenthesized thing.
+ *
+ * Caller must absorb opening parenthesis.
+ *
+ * Combining parenthesis handling with the base level of regular expression
+ * is a trifle forced, but the need to tie the tails of the branches to what
+ * follows makes it hard to avoid.
+ */
+ static char_u *
+reg(
+ int paren, // REG_NOPAREN, REG_PAREN, REG_NPAREN or REG_ZPAREN
+ int *flagp)
+{
+ char_u *ret;
+ char_u *br;
+ char_u *ender;
+ int parno = 0;
+ int flags;
+
+ *flagp = HASWIDTH; // Tentatively.
+
+#ifdef FEAT_SYN_HL
+ if (paren == REG_ZPAREN)
+ {
+ // Make a ZOPEN node.
+ if (regnzpar >= NSUBEXP)
+ EMSG_RET_NULL(_(e_too_many_z));
+ parno = regnzpar;
+ regnzpar++;
+ ret = regnode(ZOPEN + parno);
+ }
+ else
+#endif
+ if (paren == REG_PAREN)
+ {
+ // Make a MOPEN node.
+ if (regnpar >= NSUBEXP)
+ EMSG2_RET_NULL(_(e_too_many_str_open), reg_magic == MAGIC_ALL);
+ parno = regnpar;
+ ++regnpar;
+ ret = regnode(MOPEN + parno);
+ }
+ else if (paren == REG_NPAREN)
+ {
+ // Make a NOPEN node.
+ ret = regnode(NOPEN);
+ }
+ else
+ ret = NULL;
+
+ // Pick up the branches, linking them together.
+ br = regbranch(&flags);
+ if (br == NULL)
+ return NULL;
+ if (ret != NULL)
+ regtail(ret, br); // [MZ]OPEN -> first.
+ else
+ ret = br;
+ // If one of the branches can be zero-width, the whole thing can.
+ // If one of the branches has * at start or matches a line-break, the
+ // whole thing can.
+ if (!(flags & HASWIDTH))
+ *flagp &= ~HASWIDTH;
+ *flagp |= flags & (SPSTART | HASNL | HASLOOKBH);
+ while (peekchr() == Magic('|'))
+ {
+ skipchr();
+ br = regbranch(&flags);
+ if (br == NULL || reg_toolong)
+ return NULL;
+ regtail(ret, br); // BRANCH -> BRANCH.
+ if (!(flags & HASWIDTH))
+ *flagp &= ~HASWIDTH;
+ *flagp |= flags & (SPSTART | HASNL | HASLOOKBH);
+ }
+
+ // Make a closing node, and hook it on the end.
+ ender = regnode(
+#ifdef FEAT_SYN_HL
+ paren == REG_ZPAREN ? ZCLOSE + parno :
+#endif
+ paren == REG_PAREN ? MCLOSE + parno :
+ paren == REG_NPAREN ? NCLOSE : END);
+ regtail(ret, ender);
+
+ // Hook the tails of the branches to the closing node.
+ for (br = ret; br != NULL; br = regnext(br))
+ regoptail(br, ender);
+
+ // Check for proper termination.
+ if (paren != REG_NOPAREN && getchr() != Magic(')'))
+ {
+#ifdef FEAT_SYN_HL
+ if (paren == REG_ZPAREN)
+ EMSG_RET_NULL(_(e_unmatched_z));
+ else
+#endif
+ if (paren == REG_NPAREN)
+ EMSG2_RET_NULL(_(e_unmatched_str_percent_open), reg_magic == MAGIC_ALL);
+ else
+ EMSG2_RET_NULL(_(e_unmatched_str_open), reg_magic == MAGIC_ALL);
+ }
+ else if (paren == REG_NOPAREN && peekchr() != NUL)
+ {
+ if (curchr == Magic(')'))
+ EMSG2_RET_NULL(_(e_unmatched_str_close), reg_magic == MAGIC_ALL);
+ else
+ EMSG_RET_NULL(_(e_trailing_characters)); // "Can't happen".
+ // NOTREACHED
+ }
+ // Here we set the flag allowing back references to this set of
+ // parentheses.
+ if (paren == REG_PAREN)
+ had_endbrace[parno] = TRUE; // have seen the close paren
+ return ret;
+}
+
+/*
+ * bt_regcomp() - compile a regular expression into internal code for the
+ * traditional back track matcher.
+ * Returns the program in allocated space. Returns NULL for an error.
+ *
+ * We can't allocate space until we know how big the compiled form will be,
+ * but we can't compile it (and thus know how big it is) until we've got a
+ * place to put the code. So we cheat: we compile it twice, once with code
+ * generation turned off and size counting turned on, and once "for real".
+ * This also means that we don't allocate space until we are sure that the
+ * thing really will compile successfully, and we never have to move the
+ * code and thus invalidate pointers into it. (Note that it has to be in
+ * one piece because vim_free() must be able to free it all.)
+ *
+ * Whether upper/lower case is to be ignored is decided when executing the
+ * program, it does not matter here.
+ *
+ * Beware that the optimization-preparation code in here knows about some
+ * of the structure of the compiled regexp.
+ * "re_flags": RE_MAGIC and/or RE_STRING.
+ */
+ static regprog_T *
+bt_regcomp(char_u *expr, int re_flags)
+{
+ bt_regprog_T *r;
+ char_u *scan;
+ char_u *longest;
+ int len;
+ int flags;
+
+ if (expr == NULL)
+ IEMSG_RET_NULL(e_null_argument);
+
+ init_class_tab();
+
+ // First pass: determine size, legality.
+ regcomp_start(expr, re_flags);
+ regcode = JUST_CALC_SIZE;
+ regc(REGMAGIC);
+ if (reg(REG_NOPAREN, &flags) == NULL)
+ return NULL;
+
+ // Allocate space.
+ r = alloc(offsetof(bt_regprog_T, program) + regsize);
+ if (r == NULL)
+ return NULL;
+ r->re_in_use = FALSE;
+
+ // Second pass: emit code.
+ regcomp_start(expr, re_flags);
+ regcode = r->program;
+ regc(REGMAGIC);
+ if (reg(REG_NOPAREN, &flags) == NULL || reg_toolong)
+ {
+ vim_free(r);
+ if (reg_toolong)
+ EMSG_RET_NULL(_(e_pattern_too_long));
+ return NULL;
+ }
+
+ // Dig out information for optimizations.
+ r->regstart = NUL; // Worst-case defaults.
+ r->reganch = 0;
+ r->regmust = NULL;
+ r->regmlen = 0;
+ r->regflags = regflags;
+ if (flags & HASNL)
+ r->regflags |= RF_HASNL;
+ if (flags & HASLOOKBH)
+ r->regflags |= RF_LOOKBH;
+#ifdef FEAT_SYN_HL
+ // Remember whether this pattern has any \z specials in it.
+ r->reghasz = re_has_z;
+#endif
+ scan = r->program + 1; // First BRANCH.
+ if (OP(regnext(scan)) == END) // Only one top-level choice.
+ {
+ scan = OPERAND(scan);
+
+ // Starting-point info.
+ if (OP(scan) == BOL || OP(scan) == RE_BOF)
+ {
+ r->reganch++;
+ scan = regnext(scan);
+ }
+
+ if (OP(scan) == EXACTLY)
+ {
+ if (has_mbyte)
+ r->regstart = (*mb_ptr2char)(OPERAND(scan));
+ else
+ r->regstart = *OPERAND(scan);
+ }
+ else if ((OP(scan) == BOW
+ || OP(scan) == EOW
+ || OP(scan) == NOTHING
+ || OP(scan) == MOPEN + 0 || OP(scan) == NOPEN
+ || OP(scan) == MCLOSE + 0 || OP(scan) == NCLOSE)
+ && OP(regnext(scan)) == EXACTLY)
+ {
+ if (has_mbyte)
+ r->regstart = (*mb_ptr2char)(OPERAND(regnext(scan)));
+ else
+ r->regstart = *OPERAND(regnext(scan));
+ }
+
+ // If there's something expensive in the r.e., find the longest
+ // literal string that must appear and make it the regmust. Resolve
+ // ties in favor of later strings, since the regstart check works
+ // with the beginning of the r.e. and avoiding duplication
+ // strengthens checking. Not a strong reason, but sufficient in the
+ // absence of others.
+
+ // When the r.e. starts with BOW, it is faster to look for a regmust
+ // first. Used a lot for "#" and "*" commands. (Added by mool).
+ if ((flags & SPSTART || OP(scan) == BOW || OP(scan) == EOW)
+ && !(flags & HASNL))
+ {
+ longest = NULL;
+ len = 0;
+ for (; scan != NULL; scan = regnext(scan))
+ if (OP(scan) == EXACTLY && STRLEN(OPERAND(scan)) >= (size_t)len)
+ {
+ longest = OPERAND(scan);
+ len = (int)STRLEN(OPERAND(scan));
+ }
+ r->regmust = longest;
+ r->regmlen = len;
+ }
+ }
+#ifdef BT_REGEXP_DUMP
+ regdump(expr, r);
+#endif
+ r->engine = &bt_regengine;
+ return (regprog_T *)r;
+}
+
+#if defined(FEAT_SYN_HL) || defined(PROTO)
+/*
+ * Check if during the previous call to vim_regcomp the EOL item "$" has been
+ * found. This is messy, but it works fine.
+ */
+ int
+vim_regcomp_had_eol(void)
+{
+ return had_eol;
+}
+#endif
+
+/*
+ * Get a number after a backslash that is inside [].
+ * When nothing is recognized return a backslash.
+ */
+ static int
+coll_get_char(void)
+{
+ long nr = -1;
+
+ switch (*regparse++)
+ {
+ case 'd': nr = getdecchrs(); break;
+ case 'o': nr = getoctchrs(); break;
+ case 'x': nr = gethexchrs(2); break;
+ case 'u': nr = gethexchrs(4); break;
+ case 'U': nr = gethexchrs(8); break;
+ }
+ if (nr < 0 || nr > INT_MAX)
+ {
+ // If getting the number fails be backwards compatible: the character
+ // is a backslash.
+ --regparse;
+ nr = '\\';
+ }
+ return nr;
+}
+
+/*
+ * Free a compiled regexp program, returned by bt_regcomp().
+ */
+ static void
+bt_regfree(regprog_T *prog)
+{
+ vim_free(prog);
+}
+
+#define ADVANCE_REGINPUT() MB_PTR_ADV(rex.input)
+
+/*
+ * The arguments from BRACE_LIMITS are stored here. They are actually local
+ * to regmatch(), but they are here to reduce the amount of stack space used
+ * (it can be called recursively many times).
+ */
+static long bl_minval;
+static long bl_maxval;
+
+/*
+ * Save the input line and position in a regsave_T.
+ */
+ static void
+reg_save(regsave_T *save, garray_T *gap)
+{
+ if (REG_MULTI)
+ {
+ save->rs_u.pos.col = (colnr_T)(rex.input - rex.line);
+ save->rs_u.pos.lnum = rex.lnum;
+ }
+ else
+ save->rs_u.ptr = rex.input;
+ save->rs_len = gap->ga_len;
+}
+
+/*
+ * Restore the input line and position from a regsave_T.
+ */
+ static void
+reg_restore(regsave_T *save, garray_T *gap)
+{
+ if (REG_MULTI)
+ {
+ if (rex.lnum != save->rs_u.pos.lnum)
+ {
+ // only call reg_getline() when the line number changed to save
+ // a bit of time
+ rex.lnum = save->rs_u.pos.lnum;
+ rex.line = reg_getline(rex.lnum);
+ }
+ rex.input = rex.line + save->rs_u.pos.col;
+ }
+ else
+ rex.input = save->rs_u.ptr;
+ gap->ga_len = save->rs_len;
+}
+
+/*
+ * Return TRUE if current position is equal to saved position.
+ */
+ static int
+reg_save_equal(regsave_T *save)
+{
+ if (REG_MULTI)
+ return rex.lnum == save->rs_u.pos.lnum
+ && rex.input == rex.line + save->rs_u.pos.col;
+ return rex.input == save->rs_u.ptr;
+}
+
+// Save the sub-expressions before attempting a match.
+#define save_se(savep, posp, pp) \
+ REG_MULTI ? save_se_multi((savep), (posp)) : save_se_one((savep), (pp))
+
+// After a failed match restore the sub-expressions.
+#define restore_se(savep, posp, pp) \
+{ \
+ if (REG_MULTI) \
+ *(posp) = (savep)->se_u.pos; \
+ else \
+ *(pp) = (savep)->se_u.ptr; \
+}
+
+/*
+ * Tentatively set the sub-expression start to the current position (after
+ * calling regmatch() they will have changed). Need to save the existing
+ * values for when there is no match.
+ * Use se_save() to use pointer (save_se_multi()) or position (save_se_one()),
+ * depending on REG_MULTI.
+ */
+ static void
+save_se_multi(save_se_T *savep, lpos_T *posp)
+{
+ savep->se_u.pos = *posp;
+ posp->lnum = rex.lnum;
+ posp->col = (colnr_T)(rex.input - rex.line);
+}
+
+ static void
+save_se_one(save_se_T *savep, char_u **pp)
+{
+ savep->se_u.ptr = *pp;
+ *pp = rex.input;
+}
+
+/*
+ * regrepeat - repeatedly match something simple, return how many.
+ * Advances rex.input (and rex.lnum) to just after the matched chars.
+ */
+ static int
+regrepeat(
+ char_u *p,
+ long maxcount) // maximum number of matches allowed
+{
+ long count = 0;
+ char_u *scan;
+ char_u *opnd;
+ int mask;
+ int testval = 0;
+
+ scan = rex.input; // Make local copy of rex.input for speed.
+ opnd = OPERAND(p);
+ switch (OP(p))
+ {
+ case ANY:
+ case ANY + ADD_NL:
+ while (count < maxcount)
+ {
+ // Matching anything means we continue until end-of-line (or
+ // end-of-file for ANY + ADD_NL), only limited by maxcount.
+ while (*scan != NUL && count < maxcount)
+ {
+ ++count;
+ MB_PTR_ADV(scan);
+ }
+ if (!REG_MULTI || !WITH_NL(OP(p)) || rex.lnum > rex.reg_maxline
+ || rex.reg_line_lbr || count == maxcount)
+ break;
+ ++count; // count the line-break
+ reg_nextline();
+ scan = rex.input;
+ if (got_int)
+ break;
+ }
+ break;
+
+ case IDENT:
+ case IDENT + ADD_NL:
+ testval = TRUE;
+ // FALLTHROUGH
+ case SIDENT:
+ case SIDENT + ADD_NL:
+ while (count < maxcount)
+ {
+ if (vim_isIDc(PTR2CHAR(scan)) && (testval || !VIM_ISDIGIT(*scan)))
+ {
+ MB_PTR_ADV(scan);
+ }
+ else if (*scan == NUL)
+ {
+ if (!REG_MULTI || !WITH_NL(OP(p)) || rex.lnum > rex.reg_maxline
+ || rex.reg_line_lbr)
+ break;
+ reg_nextline();
+ scan = rex.input;
+ if (got_int)
+ break;
+ }
+ else if (rex.reg_line_lbr && *scan == '\n' && WITH_NL(OP(p)))
+ ++scan;
+ else
+ break;
+ ++count;
+ }
+ break;
+
+ case KWORD:
+ case KWORD + ADD_NL:
+ testval = TRUE;
+ // FALLTHROUGH
+ case SKWORD:
+ case SKWORD + ADD_NL:
+ while (count < maxcount)
+ {
+ if (vim_iswordp_buf(scan, rex.reg_buf)
+ && (testval || !VIM_ISDIGIT(*scan)))
+ {
+ MB_PTR_ADV(scan);
+ }
+ else if (*scan == NUL)
+ {
+ if (!REG_MULTI || !WITH_NL(OP(p)) || rex.lnum > rex.reg_maxline
+ || rex.reg_line_lbr)
+ break;
+ reg_nextline();
+ scan = rex.input;
+ if (got_int)
+ break;
+ }
+ else if (rex.reg_line_lbr && *scan == '\n' && WITH_NL(OP(p)))
+ ++scan;
+ else
+ break;
+ ++count;
+ }
+ break;
+
+ case FNAME:
+ case FNAME + ADD_NL:
+ testval = TRUE;
+ // FALLTHROUGH
+ case SFNAME:
+ case SFNAME + ADD_NL:
+ while (count < maxcount)
+ {
+ if (vim_isfilec(PTR2CHAR(scan)) && (testval || !VIM_ISDIGIT(*scan)))
+ {
+ MB_PTR_ADV(scan);
+ }
+ else if (*scan == NUL)
+ {
+ if (!REG_MULTI || !WITH_NL(OP(p)) || rex.lnum > rex.reg_maxline
+ || rex.reg_line_lbr)
+ break;
+ reg_nextline();
+ scan = rex.input;
+ if (got_int)
+ break;
+ }
+ else if (rex.reg_line_lbr && *scan == '\n' && WITH_NL(OP(p)))
+ ++scan;
+ else
+ break;
+ ++count;
+ }
+ break;
+
+ case PRINT:
+ case PRINT + ADD_NL:
+ testval = TRUE;
+ // FALLTHROUGH
+ case SPRINT:
+ case SPRINT + ADD_NL:
+ while (count < maxcount)
+ {
+ if (*scan == NUL)
+ {
+ if (!REG_MULTI || !WITH_NL(OP(p)) || rex.lnum > rex.reg_maxline
+ || rex.reg_line_lbr)
+ break;
+ reg_nextline();
+ scan = rex.input;
+ if (got_int)
+ break;
+ }
+ else if (vim_isprintc(PTR2CHAR(scan)) == 1
+ && (testval || !VIM_ISDIGIT(*scan)))
+ {
+ MB_PTR_ADV(scan);
+ }
+ else if (rex.reg_line_lbr && *scan == '\n' && WITH_NL(OP(p)))
+ ++scan;
+ else
+ break;
+ ++count;
+ }
+ break;
+
+ case WHITE:
+ case WHITE + ADD_NL:
+ testval = mask = RI_WHITE;
+do_class:
+ while (count < maxcount)
+ {
+ int l;
+
+ if (*scan == NUL)
+ {
+ if (!REG_MULTI || !WITH_NL(OP(p)) || rex.lnum > rex.reg_maxline
+ || rex.reg_line_lbr)
+ break;
+ reg_nextline();
+ scan = rex.input;
+ if (got_int)
+ break;
+ }
+ else if (has_mbyte && (l = (*mb_ptr2len)(scan)) > 1)
+ {
+ if (testval != 0)
+ break;
+ scan += l;
+ }
+ else if ((class_tab[*scan] & mask) == testval)
+ ++scan;
+ else if (rex.reg_line_lbr && *scan == '\n' && WITH_NL(OP(p)))
+ ++scan;
+ else
+ break;
+ ++count;
+ }
+ break;
+
+ case NWHITE:
+ case NWHITE + ADD_NL:
+ mask = RI_WHITE;
+ goto do_class;
+ case DIGIT:
+ case DIGIT + ADD_NL:
+ testval = mask = RI_DIGIT;
+ goto do_class;
+ case NDIGIT:
+ case NDIGIT + ADD_NL:
+ mask = RI_DIGIT;
+ goto do_class;
+ case HEX:
+ case HEX + ADD_NL:
+ testval = mask = RI_HEX;
+ goto do_class;
+ case NHEX:
+ case NHEX + ADD_NL:
+ mask = RI_HEX;
+ goto do_class;
+ case OCTAL:
+ case OCTAL + ADD_NL:
+ testval = mask = RI_OCTAL;
+ goto do_class;
+ case NOCTAL:
+ case NOCTAL + ADD_NL:
+ mask = RI_OCTAL;
+ goto do_class;
+ case WORD:
+ case WORD + ADD_NL:
+ testval = mask = RI_WORD;
+ goto do_class;
+ case NWORD:
+ case NWORD + ADD_NL:
+ mask = RI_WORD;
+ goto do_class;
+ case HEAD:
+ case HEAD + ADD_NL:
+ testval = mask = RI_HEAD;
+ goto do_class;
+ case NHEAD:
+ case NHEAD + ADD_NL:
+ mask = RI_HEAD;
+ goto do_class;
+ case ALPHA:
+ case ALPHA + ADD_NL:
+ testval = mask = RI_ALPHA;
+ goto do_class;
+ case NALPHA:
+ case NALPHA + ADD_NL:
+ mask = RI_ALPHA;
+ goto do_class;
+ case LOWER:
+ case LOWER + ADD_NL:
+ testval = mask = RI_LOWER;
+ goto do_class;
+ case NLOWER:
+ case NLOWER + ADD_NL:
+ mask = RI_LOWER;
+ goto do_class;
+ case UPPER:
+ case UPPER + ADD_NL:
+ testval = mask = RI_UPPER;
+ goto do_class;
+ case NUPPER:
+ case NUPPER + ADD_NL:
+ mask = RI_UPPER;
+ goto do_class;
+
+ case EXACTLY:
+ {
+ int cu, cl;
+
+ // This doesn't do a multi-byte character, because a MULTIBYTECODE
+ // would have been used for it. It does handle single-byte
+ // characters, such as latin1.
+ if (rex.reg_ic)
+ {
+ cu = MB_TOUPPER(*opnd);
+ cl = MB_TOLOWER(*opnd);
+ while (count < maxcount && (*scan == cu || *scan == cl))
+ {
+ count++;
+ scan++;
+ }
+ }
+ else
+ {
+ cu = *opnd;
+ while (count < maxcount && *scan == cu)
+ {
+ count++;
+ scan++;
+ }
+ }
+ break;
+ }
+
+ case MULTIBYTECODE:
+ {
+ int i, len, cf = 0;
+
+ // Safety check (just in case 'encoding' was changed since
+ // compiling the program).
+ if ((len = (*mb_ptr2len)(opnd)) > 1)
+ {
+ if (rex.reg_ic && enc_utf8)
+ cf = utf_fold(utf_ptr2char(opnd));
+ while (count < maxcount && (*mb_ptr2len)(scan) >= len)
+ {
+ for (i = 0; i < len; ++i)
+ if (opnd[i] != scan[i])
+ break;
+ if (i < len && (!rex.reg_ic || !enc_utf8
+ || utf_fold(utf_ptr2char(scan)) != cf))
+ break;
+ scan += len;
+ ++count;
+ }
+ }
+ }
+ break;
+
+ case ANYOF:
+ case ANYOF + ADD_NL:
+ testval = TRUE;
+ // FALLTHROUGH
+
+ case ANYBUT:
+ case ANYBUT + ADD_NL:
+ while (count < maxcount)
+ {
+ int len;
+
+ if (*scan == NUL)
+ {
+ if (!REG_MULTI || !WITH_NL(OP(p)) || rex.lnum > rex.reg_maxline
+ || rex.reg_line_lbr)
+ break;
+ reg_nextline();
+ scan = rex.input;
+ if (got_int)
+ break;
+ }
+ else if (rex.reg_line_lbr && *scan == '\n' && WITH_NL(OP(p)))
+ ++scan;
+ else if (has_mbyte && (len = (*mb_ptr2len)(scan)) > 1)
+ {
+ if ((cstrchr(opnd, (*mb_ptr2char)(scan)) == NULL) == testval)
+ break;
+ scan += len;
+ }
+ else
+ {
+ if ((cstrchr(opnd, *scan) == NULL) == testval)
+ break;
+ ++scan;
+ }
+ ++count;
+ }
+ break;
+
+ case NEWL:
+ while (count < maxcount
+ && ((*scan == NUL && rex.lnum <= rex.reg_maxline
+ && !rex.reg_line_lbr && REG_MULTI)
+ || (*scan == '\n' && rex.reg_line_lbr)))
+ {
+ count++;
+ if (rex.reg_line_lbr)
+ ADVANCE_REGINPUT();
+ else
+ reg_nextline();
+ scan = rex.input;
+ if (got_int)
+ break;
+ }
+ break;
+
+ default: // Oh dear. Called inappropriately.
+ iemsg(e_corrupted_regexp_program);
+#ifdef DEBUG
+ printf("Called regrepeat with op code %d\n", OP(p));
+#endif
+ break;
+ }
+
+ rex.input = scan;
+
+ return (int)count;
+}
+
+/*
+ * Push an item onto the regstack.
+ * Returns pointer to new item. Returns NULL when out of memory.
+ */
+ static regitem_T *
+regstack_push(regstate_T state, char_u *scan)
+{
+ regitem_T *rp;
+
+ if ((long)((unsigned)regstack.ga_len >> 10) >= p_mmp)
+ {
+ emsg(_(e_pattern_uses_more_memory_than_maxmempattern));
+ return NULL;
+ }
+ if (ga_grow(&regstack, sizeof(regitem_T)) == FAIL)
+ return NULL;
+
+ rp = (regitem_T *)((char *)regstack.ga_data + regstack.ga_len);
+ rp->rs_state = state;
+ rp->rs_scan = scan;
+
+ regstack.ga_len += sizeof(regitem_T);
+ return rp;
+}
+
+/*
+ * Pop an item from the regstack.
+ */
+ static void
+regstack_pop(char_u **scan)
+{
+ regitem_T *rp;
+
+ rp = (regitem_T *)((char *)regstack.ga_data + regstack.ga_len) - 1;
+ *scan = rp->rs_scan;
+
+ regstack.ga_len -= sizeof(regitem_T);
+}
+
+#ifdef FEAT_RELTIME
+/*
+ * Check if the timer expired, return TRUE if so.
+ */
+ static int
+bt_did_time_out(int *timed_out)
+{
+ if (*timeout_flag)
+ {
+ if (timed_out != NULL)
+ {
+# ifdef FEAT_EVAL
+ if (!*timed_out)
+ ch_log(NULL, "BT regexp timed out");
+# endif
+ *timed_out = TRUE;
+ }
+ return TRUE;
+ }
+ return FALSE;
+}
+#endif
+
+/*
+ * Save the current subexpr to "bp", so that they can be restored
+ * later by restore_subexpr().
+ */
+ static void
+save_subexpr(regbehind_T *bp)
+{
+ int i;
+
+ // When "rex.need_clear_subexpr" is set we don't need to save the values,
+ // only remember that this flag needs to be set again when restoring.
+ bp->save_need_clear_subexpr = rex.need_clear_subexpr;
+ if (rex.need_clear_subexpr)
+ return;
+
+ for (i = 0; i < NSUBEXP; ++i)
+ {
+ if (REG_MULTI)
+ {
+ bp->save_start[i].se_u.pos = rex.reg_startpos[i];
+ bp->save_end[i].se_u.pos = rex.reg_endpos[i];
+ }
+ else
+ {
+ bp->save_start[i].se_u.ptr = rex.reg_startp[i];
+ bp->save_end[i].se_u.ptr = rex.reg_endp[i];
+ }
+ }
+}
+
+/*
+ * Restore the subexpr from "bp".
+ */
+ static void
+restore_subexpr(regbehind_T *bp)
+{
+ int i;
+
+ // Only need to restore saved values when they are not to be cleared.
+ rex.need_clear_subexpr = bp->save_need_clear_subexpr;
+ if (rex.need_clear_subexpr)
+ return;
+
+ for (i = 0; i < NSUBEXP; ++i)
+ {
+ if (REG_MULTI)
+ {
+ rex.reg_startpos[i] = bp->save_start[i].se_u.pos;
+ rex.reg_endpos[i] = bp->save_end[i].se_u.pos;
+ }
+ else
+ {
+ rex.reg_startp[i] = bp->save_start[i].se_u.ptr;
+ rex.reg_endp[i] = bp->save_end[i].se_u.ptr;
+ }
+ }
+}
+
+/*
+ * regmatch - main matching routine
+ *
+ * Conceptually the strategy is simple: Check to see whether the current node
+ * matches, push an item onto the regstack and loop to see whether the rest
+ * matches, and then act accordingly. In practice we make some effort to
+ * avoid using the regstack, in particular by going through "ordinary" nodes
+ * (that don't need to know whether the rest of the match failed) by a nested
+ * loop.
+ *
+ * Returns TRUE when there is a match. Leaves rex.input and rex.lnum just after
+ * the last matched character.
+ * Returns FALSE when there is no match. Leaves rex.input and rex.lnum in an
+ * undefined state!
+ */
+ static int
+regmatch(
+ char_u *scan, // Current node.
+ int *timed_out UNUSED) // flag set on timeout or NULL
+{
+ char_u *next; // Next node.
+ int op;
+ int c;
+ regitem_T *rp;
+ int no;
+ int status; // one of the RA_ values:
+
+ // Make "regstack" and "backpos" empty. They are allocated and freed in
+ // bt_regexec_both() to reduce malloc()/free() calls.
+ regstack.ga_len = 0;
+ backpos.ga_len = 0;
+
+ // Repeat until "regstack" is empty.
+ for (;;)
+ {
+ // Some patterns may take a long time to match, e.g., "\([a-z]\+\)\+Q".
+ // Allow interrupting them with CTRL-C.
+ fast_breakcheck();
+
+#ifdef DEBUG
+ if (scan != NULL && regnarrate)
+ {
+ mch_errmsg((char *)regprop(scan));
+ mch_errmsg("(\n");
+ }
+#endif
+
+ // Repeat for items that can be matched sequentially, without using the
+ // regstack.
+ for (;;)
+ {
+ if (got_int || scan == NULL)
+ {
+ status = RA_FAIL;
+ break;
+ }
+#ifdef FEAT_RELTIME
+ if (bt_did_time_out(timed_out))
+ {
+ status = RA_FAIL;
+ break;
+ }
+#endif
+ status = RA_CONT;
+
+#ifdef DEBUG
+ if (regnarrate)
+ {
+ mch_errmsg((char *)regprop(scan));
+ mch_errmsg("...\n");
+# ifdef FEAT_SYN_HL
+ if (re_extmatch_in != NULL)
+ {
+ int i;
+
+ mch_errmsg(_("External submatches:\n"));
+ for (i = 0; i < NSUBEXP; i++)
+ {
+ mch_errmsg(" \"");
+ if (re_extmatch_in->matches[i] != NULL)
+ mch_errmsg((char *)re_extmatch_in->matches[i]);
+ mch_errmsg("\"\n");
+ }
+ }
+# endif
+ }
+#endif
+ next = regnext(scan);
+
+ op = OP(scan);
+ // Check for character class with NL added.
+ if (!rex.reg_line_lbr && WITH_NL(op) && REG_MULTI
+ && *rex.input == NUL && rex.lnum <= rex.reg_maxline)
+ {
+ reg_nextline();
+ }
+ else if (rex.reg_line_lbr && WITH_NL(op) && *rex.input == '\n')
+ {
+ ADVANCE_REGINPUT();
+ }
+ else
+ {
+ if (WITH_NL(op))
+ op -= ADD_NL;
+ if (has_mbyte)
+ c = (*mb_ptr2char)(rex.input);
+ else
+ c = *rex.input;
+ switch (op)
+ {
+ case BOL:
+ if (rex.input != rex.line)
+ status = RA_NOMATCH;
+ break;
+
+ case EOL:
+ if (c != NUL)
+ status = RA_NOMATCH;
+ break;
+
+ case RE_BOF:
+ // We're not at the beginning of the file when below the first
+ // line where we started, not at the start of the line or we
+ // didn't start at the first line of the buffer.
+ if (rex.lnum != 0 || rex.input != rex.line
+ || (REG_MULTI && rex.reg_firstlnum > 1))
+ status = RA_NOMATCH;
+ break;
+
+ case RE_EOF:
+ if (rex.lnum != rex.reg_maxline || c != NUL)
+ status = RA_NOMATCH;
+ break;
+
+ case CURSOR:
+ // Check if the buffer is in a window and compare the
+ // rex.reg_win->w_cursor position to the match position.
+ if (rex.reg_win == NULL
+ || (rex.lnum + rex.reg_firstlnum
+ != rex.reg_win->w_cursor.lnum)
+ || ((colnr_T)(rex.input - rex.line)
+ != rex.reg_win->w_cursor.col))
+ status = RA_NOMATCH;
+ break;
+
+ case RE_MARK:
+ // Compare the mark position to the match position.
+ {
+ int mark = OPERAND(scan)[0];
+ int cmp = OPERAND(scan)[1];
+ pos_T *pos;
+ size_t col = REG_MULTI ? rex.input - rex.line : 0;
+
+ pos = getmark_buf(rex.reg_buf, mark, FALSE);
+
+ // Line may have been freed, get it again.
+ if (REG_MULTI)
+ {
+ rex.line = reg_getline(rex.lnum);
+ rex.input = rex.line + col;
+ }
+
+ if (pos == NULL // mark doesn't exist
+ || pos->lnum <= 0) // mark isn't set in reg_buf
+ {
+ status = RA_NOMATCH;
+ }
+ else
+ {
+ colnr_T pos_col = pos->lnum == rex.lnum + rex.reg_firstlnum
+ && pos->col == MAXCOL
+ ? (colnr_T)STRLEN(reg_getline(
+ pos->lnum - rex.reg_firstlnum))
+ : pos->col;
+
+ if ((pos->lnum == rex.lnum + rex.reg_firstlnum
+ ? (pos_col == (colnr_T)(rex.input - rex.line)
+ ? (cmp == '<' || cmp == '>')
+ : (pos_col < (colnr_T)(rex.input - rex.line)
+ ? cmp != '>'
+ : cmp != '<'))
+ : (pos->lnum < rex.lnum + rex.reg_firstlnum
+ ? cmp != '>'
+ : cmp != '<')))
+ status = RA_NOMATCH;
+ }
+ }
+ break;
+
+ case RE_VISUAL:
+ if (!reg_match_visual())
+ status = RA_NOMATCH;
+ break;
+
+ case RE_LNUM:
+ if (!REG_MULTI || !re_num_cmp((long_u)(rex.lnum + rex.reg_firstlnum),
+ scan))
+ status = RA_NOMATCH;
+ break;
+
+ case RE_COL:
+ if (!re_num_cmp((long_u)(rex.input - rex.line) + 1, scan))
+ status = RA_NOMATCH;
+ break;
+
+ case RE_VCOL:
+ {
+ win_T *wp = rex.reg_win == NULL ? curwin : rex.reg_win;
+ linenr_T lnum = REG_MULTI ? rex.reg_firstlnum + rex.lnum : 1;
+ long_u vcol;
+
+ if (REG_MULTI && (lnum <= 0
+ || lnum > wp->w_buffer->b_ml.ml_line_count))
+ lnum = 1;
+ vcol = (long_u)win_linetabsize(wp, lnum, rex.line,
+ (colnr_T)(rex.input - rex.line));
+ if (!re_num_cmp(vcol + 1, scan))
+ status = RA_NOMATCH;
+ }
+ break;
+
+ case BOW: // \<word; rex.input points to w
+ if (c == NUL) // Can't match at end of line
+ status = RA_NOMATCH;
+ else if (has_mbyte)
+ {
+ int this_class;
+
+ // Get class of current and previous char (if it exists).
+ this_class = mb_get_class_buf(rex.input, rex.reg_buf);
+ if (this_class <= 1)
+ status = RA_NOMATCH; // not on a word at all
+ else if (reg_prev_class() == this_class)
+ status = RA_NOMATCH; // previous char is in same word
+ }
+ else
+ {
+ if (!vim_iswordc_buf(c, rex.reg_buf) || (rex.input > rex.line
+ && vim_iswordc_buf(rex.input[-1], rex.reg_buf)))
+ status = RA_NOMATCH;
+ }
+ break;
+
+ case EOW: // word\>; rex.input points after d
+ if (rex.input == rex.line) // Can't match at start of line
+ status = RA_NOMATCH;
+ else if (has_mbyte)
+ {
+ int this_class, prev_class;
+
+ // Get class of current and previous char (if it exists).
+ this_class = mb_get_class_buf(rex.input, rex.reg_buf);
+ prev_class = reg_prev_class();
+ if (this_class == prev_class
+ || prev_class == 0 || prev_class == 1)
+ status = RA_NOMATCH;
+ }
+ else
+ {
+ if (!vim_iswordc_buf(rex.input[-1], rex.reg_buf)
+ || (rex.input[0] != NUL
+ && vim_iswordc_buf(c, rex.reg_buf)))
+ status = RA_NOMATCH;
+ }
+ break; // Matched with EOW
+
+ case ANY:
+ // ANY does not match new lines.
+ if (c == NUL)
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case IDENT:
+ if (!vim_isIDc(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case SIDENT:
+ if (VIM_ISDIGIT(*rex.input) || !vim_isIDc(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case KWORD:
+ if (!vim_iswordp_buf(rex.input, rex.reg_buf))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case SKWORD:
+ if (VIM_ISDIGIT(*rex.input)
+ || !vim_iswordp_buf(rex.input, rex.reg_buf))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case FNAME:
+ if (!vim_isfilec(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case SFNAME:
+ if (VIM_ISDIGIT(*rex.input) || !vim_isfilec(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case PRINT:
+ if (!vim_isprintc(PTR2CHAR(rex.input)))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case SPRINT:
+ if (VIM_ISDIGIT(*rex.input) || !vim_isprintc(PTR2CHAR(rex.input)))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case WHITE:
+ if (!VIM_ISWHITE(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case NWHITE:
+ if (c == NUL || VIM_ISWHITE(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case DIGIT:
+ if (!ri_digit(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case NDIGIT:
+ if (c == NUL || ri_digit(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case HEX:
+ if (!ri_hex(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case NHEX:
+ if (c == NUL || ri_hex(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case OCTAL:
+ if (!ri_octal(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case NOCTAL:
+ if (c == NUL || ri_octal(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case WORD:
+ if (!ri_word(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case NWORD:
+ if (c == NUL || ri_word(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case HEAD:
+ if (!ri_head(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case NHEAD:
+ if (c == NUL || ri_head(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case ALPHA:
+ if (!ri_alpha(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case NALPHA:
+ if (c == NUL || ri_alpha(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case LOWER:
+ if (!ri_lower(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case NLOWER:
+ if (c == NUL || ri_lower(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case UPPER:
+ if (!ri_upper(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case NUPPER:
+ if (c == NUL || ri_upper(c))
+ status = RA_NOMATCH;
+ else
+ ADVANCE_REGINPUT();
+ break;
+
+ case EXACTLY:
+ {
+ int len;
+ char_u *opnd;
+
+ opnd = OPERAND(scan);
+ // Inline the first byte, for speed.
+ if (*opnd != *rex.input
+ && (!rex.reg_ic
+ || (!enc_utf8
+ && MB_TOLOWER(*opnd) != MB_TOLOWER(*rex.input))))
+ status = RA_NOMATCH;
+ else if (*opnd == NUL)
+ {
+ // match empty string always works; happens when "~" is
+ // empty.
+ }
+ else
+ {
+ if (opnd[1] == NUL && !(enc_utf8 && rex.reg_ic))
+ {
+ len = 1; // matched a single byte above
+ }
+ else
+ {
+ // Need to match first byte again for multi-byte.
+ len = (int)STRLEN(opnd);
+ if (cstrncmp(opnd, rex.input, &len) != 0)
+ status = RA_NOMATCH;
+ }
+ // Check for following composing character, unless %C
+ // follows (skips over all composing chars).
+ if (status != RA_NOMATCH
+ && enc_utf8
+ && UTF_COMPOSINGLIKE(rex.input, rex.input + len)
+ && !rex.reg_icombine
+ && OP(next) != RE_COMPOSING)
+ {
+ // raaron: This code makes a composing character get
+ // ignored, which is the correct behavior (sometimes)
+ // for voweled Hebrew texts.
+ status = RA_NOMATCH;
+ }
+ if (status != RA_NOMATCH)
+ rex.input += len;
+ }
+ }
+ break;
+
+ case ANYOF:
+ case ANYBUT:
+ {
+ char_u *q = OPERAND(scan);
+
+ if (c == NUL)
+ status = RA_NOMATCH;
+ else if ((cstrchr(q, c) == NULL) == (op == ANYOF))
+ status = RA_NOMATCH;
+ else
+ {
+ // Check following combining characters
+ int len = 0;
+ int i;
+
+ if (enc_utf8)
+ len = utfc_ptr2len(q) - utf_ptr2len(q);
+
+ MB_CPTR_ADV(rex.input);
+ MB_CPTR_ADV(q);
+
+ if (!enc_utf8 || len == 0)
+ break;
+
+ for (i = 0; i < len; ++i)
+ if (q[i] != rex.input[i])
+ {
+ status = RA_NOMATCH;
+ break;
+ }
+ rex.input += len;
+ }
+ break;
+ }
+
+ case MULTIBYTECODE:
+ if (has_mbyte)
+ {
+ int i, len;
+ char_u *opnd;
+ int opndc = 0, inpc;
+
+ opnd = OPERAND(scan);
+ // Safety check (just in case 'encoding' was changed since
+ // compiling the program).
+ if ((len = (*mb_ptr2len)(opnd)) < 2)
+ {
+ status = RA_NOMATCH;
+ break;
+ }
+ if (enc_utf8)
+ opndc = utf_ptr2char(opnd);
+ if (enc_utf8 && utf_iscomposing(opndc))
+ {
+ // When only a composing char is given match at any
+ // position where that composing char appears.
+ status = RA_NOMATCH;
+ for (i = 0; rex.input[i] != NUL;
+ i += utf_ptr2len(rex.input + i))
+ {
+ inpc = utf_ptr2char(rex.input + i);
+ if (!utf_iscomposing(inpc))
+ {
+ if (i > 0)
+ break;
+ }
+ else if (opndc == inpc)
+ {
+ // Include all following composing chars.
+ len = i + utfc_ptr2len(rex.input + i);
+ status = RA_MATCH;
+ break;
+ }
+ }
+ }
+ else
+ for (i = 0; i < len; ++i)
+ if (opnd[i] != rex.input[i])
+ {
+ status = RA_NOMATCH;
+ break;
+ }
+ rex.input += len;
+ }
+ else
+ status = RA_NOMATCH;
+ break;
+ case RE_COMPOSING:
+ if (enc_utf8)
+ {
+ // Skip composing characters.
+ while (utf_iscomposing(utf_ptr2char(rex.input)))
+ MB_CPTR_ADV(rex.input);
+ }
+ break;
+
+ case NOTHING:
+ break;
+
+ case BACK:
+ {
+ int i;
+ backpos_T *bp;
+
+ // When we run into BACK we need to check if we don't keep
+ // looping without matching any input. The second and later
+ // times a BACK is encountered it fails if the input is still
+ // at the same position as the previous time.
+ // The positions are stored in "backpos" and found by the
+ // current value of "scan", the position in the RE program.
+ bp = (backpos_T *)backpos.ga_data;
+ for (i = 0; i < backpos.ga_len; ++i)
+ if (bp[i].bp_scan == scan)
+ break;
+ if (i == backpos.ga_len)
+ {
+ // First time at this BACK, make room to store the pos.
+ if (ga_grow(&backpos, 1) == FAIL)
+ status = RA_FAIL;
+ else
+ {
+ // get "ga_data" again, it may have changed
+ bp = (backpos_T *)backpos.ga_data;
+ bp[i].bp_scan = scan;
+ ++backpos.ga_len;
+ }
+ }
+ else if (reg_save_equal(&bp[i].bp_pos))
+ // Still at same position as last time, fail.
+ status = RA_NOMATCH;
+
+ if (status != RA_FAIL && status != RA_NOMATCH)
+ reg_save(&bp[i].bp_pos, &backpos);
+ }
+ break;
+
+ case MOPEN + 0: // Match start: \zs
+ case MOPEN + 1: // \(
+ case MOPEN + 2:
+ case MOPEN + 3:
+ case MOPEN + 4:
+ case MOPEN + 5:
+ case MOPEN + 6:
+ case MOPEN + 7:
+ case MOPEN + 8:
+ case MOPEN + 9:
+ {
+ no = op - MOPEN;
+ cleanup_subexpr();
+ rp = regstack_push(RS_MOPEN, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ rp->rs_no = no;
+ save_se(&rp->rs_un.sesave, &rex.reg_startpos[no],
+ &rex.reg_startp[no]);
+ // We simply continue and handle the result when done.
+ }
+ }
+ break;
+
+ case NOPEN: // \%(
+ case NCLOSE: // \) after \%(
+ if (regstack_push(RS_NOPEN, scan) == NULL)
+ status = RA_FAIL;
+ // We simply continue and handle the result when done.
+ break;
+
+#ifdef FEAT_SYN_HL
+ case ZOPEN + 1:
+ case ZOPEN + 2:
+ case ZOPEN + 3:
+ case ZOPEN + 4:
+ case ZOPEN + 5:
+ case ZOPEN + 6:
+ case ZOPEN + 7:
+ case ZOPEN + 8:
+ case ZOPEN + 9:
+ {
+ no = op - ZOPEN;
+ cleanup_zsubexpr();
+ rp = regstack_push(RS_ZOPEN, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ rp->rs_no = no;
+ save_se(&rp->rs_un.sesave, &reg_startzpos[no],
+ &reg_startzp[no]);
+ // We simply continue and handle the result when done.
+ }
+ }
+ break;
+#endif
+
+ case MCLOSE + 0: // Match end: \ze
+ case MCLOSE + 1: // \)
+ case MCLOSE + 2:
+ case MCLOSE + 3:
+ case MCLOSE + 4:
+ case MCLOSE + 5:
+ case MCLOSE + 6:
+ case MCLOSE + 7:
+ case MCLOSE + 8:
+ case MCLOSE + 9:
+ {
+ no = op - MCLOSE;
+ cleanup_subexpr();
+ rp = regstack_push(RS_MCLOSE, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ rp->rs_no = no;
+ save_se(&rp->rs_un.sesave, &rex.reg_endpos[no],
+ &rex.reg_endp[no]);
+ // We simply continue and handle the result when done.
+ }
+ }
+ break;
+
+#ifdef FEAT_SYN_HL
+ case ZCLOSE + 1: // \) after \z(
+ case ZCLOSE + 2:
+ case ZCLOSE + 3:
+ case ZCLOSE + 4:
+ case ZCLOSE + 5:
+ case ZCLOSE + 6:
+ case ZCLOSE + 7:
+ case ZCLOSE + 8:
+ case ZCLOSE + 9:
+ {
+ no = op - ZCLOSE;
+ cleanup_zsubexpr();
+ rp = regstack_push(RS_ZCLOSE, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ rp->rs_no = no;
+ save_se(&rp->rs_un.sesave, &reg_endzpos[no],
+ &reg_endzp[no]);
+ // We simply continue and handle the result when done.
+ }
+ }
+ break;
+#endif
+
+ case BACKREF + 1:
+ case BACKREF + 2:
+ case BACKREF + 3:
+ case BACKREF + 4:
+ case BACKREF + 5:
+ case BACKREF + 6:
+ case BACKREF + 7:
+ case BACKREF + 8:
+ case BACKREF + 9:
+ {
+ int len;
+
+ no = op - BACKREF;
+ cleanup_subexpr();
+ if (!REG_MULTI) // Single-line regexp
+ {
+ if (rex.reg_startp[no] == NULL || rex.reg_endp[no] == NULL)
+ {
+ // Backref was not set: Match an empty string.
+ len = 0;
+ }
+ else
+ {
+ // Compare current input with back-ref in the same
+ // line.
+ len = (int)(rex.reg_endp[no] - rex.reg_startp[no]);
+ if (cstrncmp(rex.reg_startp[no], rex.input, &len) != 0)
+ status = RA_NOMATCH;
+ }
+ }
+ else // Multi-line regexp
+ {
+ if (rex.reg_startpos[no].lnum < 0
+ || rex.reg_endpos[no].lnum < 0)
+ {
+ // Backref was not set: Match an empty string.
+ len = 0;
+ }
+ else
+ {
+ if (rex.reg_startpos[no].lnum == rex.lnum
+ && rex.reg_endpos[no].lnum == rex.lnum)
+ {
+ // Compare back-ref within the current line.
+ len = rex.reg_endpos[no].col
+ - rex.reg_startpos[no].col;
+ if (cstrncmp(rex.line + rex.reg_startpos[no].col,
+ rex.input, &len) != 0)
+ status = RA_NOMATCH;
+ }
+ else
+ {
+ // Messy situation: Need to compare between two
+ // lines.
+ int r = match_with_backref(
+ rex.reg_startpos[no].lnum,
+ rex.reg_startpos[no].col,
+ rex.reg_endpos[no].lnum,
+ rex.reg_endpos[no].col,
+ &len);
+
+ if (r != RA_MATCH)
+ status = r;
+ }
+ }
+ }
+
+ // Matched the backref, skip over it.
+ rex.input += len;
+ }
+ break;
+
+#ifdef FEAT_SYN_HL
+ case ZREF + 1:
+ case ZREF + 2:
+ case ZREF + 3:
+ case ZREF + 4:
+ case ZREF + 5:
+ case ZREF + 6:
+ case ZREF + 7:
+ case ZREF + 8:
+ case ZREF + 9:
+ {
+ int len;
+
+ cleanup_zsubexpr();
+ no = op - ZREF;
+ if (re_extmatch_in != NULL
+ && re_extmatch_in->matches[no] != NULL)
+ {
+ len = (int)STRLEN(re_extmatch_in->matches[no]);
+ if (cstrncmp(re_extmatch_in->matches[no],
+ rex.input, &len) != 0)
+ status = RA_NOMATCH;
+ else
+ rex.input += len;
+ }
+ else
+ {
+ // Backref was not set: Match an empty string.
+ }
+ }
+ break;
+#endif
+
+ case BRANCH:
+ {
+ if (OP(next) != BRANCH) // No choice.
+ next = OPERAND(scan); // Avoid recursion.
+ else
+ {
+ rp = regstack_push(RS_BRANCH, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ status = RA_BREAK; // rest is below
+ }
+ }
+ break;
+
+ case BRACE_LIMITS:
+ {
+ if (OP(next) == BRACE_SIMPLE)
+ {
+ bl_minval = OPERAND_MIN(scan);
+ bl_maxval = OPERAND_MAX(scan);
+ }
+ else if (OP(next) >= BRACE_COMPLEX
+ && OP(next) < BRACE_COMPLEX + 10)
+ {
+ no = OP(next) - BRACE_COMPLEX;
+ brace_min[no] = OPERAND_MIN(scan);
+ brace_max[no] = OPERAND_MAX(scan);
+ brace_count[no] = 0;
+ }
+ else
+ {
+ internal_error("BRACE_LIMITS");
+ status = RA_FAIL;
+ }
+ }
+ break;
+
+ case BRACE_COMPLEX + 0:
+ case BRACE_COMPLEX + 1:
+ case BRACE_COMPLEX + 2:
+ case BRACE_COMPLEX + 3:
+ case BRACE_COMPLEX + 4:
+ case BRACE_COMPLEX + 5:
+ case BRACE_COMPLEX + 6:
+ case BRACE_COMPLEX + 7:
+ case BRACE_COMPLEX + 8:
+ case BRACE_COMPLEX + 9:
+ {
+ no = op - BRACE_COMPLEX;
+ ++brace_count[no];
+
+ // If not matched enough times yet, try one more
+ if (brace_count[no] <= (brace_min[no] <= brace_max[no]
+ ? brace_min[no] : brace_max[no]))
+ {
+ rp = regstack_push(RS_BRCPLX_MORE, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ rp->rs_no = no;
+ reg_save(&rp->rs_un.regsave, &backpos);
+ next = OPERAND(scan);
+ // We continue and handle the result when done.
+ }
+ break;
+ }
+
+ // If matched enough times, may try matching some more
+ if (brace_min[no] <= brace_max[no])
+ {
+ // Range is the normal way around, use longest match
+ if (brace_count[no] <= brace_max[no])
+ {
+ rp = regstack_push(RS_BRCPLX_LONG, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ rp->rs_no = no;
+ reg_save(&rp->rs_un.regsave, &backpos);
+ next = OPERAND(scan);
+ // We continue and handle the result when done.
+ }
+ }
+ }
+ else
+ {
+ // Range is backwards, use shortest match first
+ if (brace_count[no] <= brace_min[no])
+ {
+ rp = regstack_push(RS_BRCPLX_SHORT, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ reg_save(&rp->rs_un.regsave, &backpos);
+ // We continue and handle the result when done.
+ }
+ }
+ }
+ }
+ break;
+
+ case BRACE_SIMPLE:
+ case STAR:
+ case PLUS:
+ {
+ regstar_T rst;
+
+ // Lookahead to avoid useless match attempts when we know
+ // what character comes next.
+ if (OP(next) == EXACTLY)
+ {
+ rst.nextb = *OPERAND(next);
+ if (rex.reg_ic)
+ {
+ if (MB_ISUPPER(rst.nextb))
+ rst.nextb_ic = MB_TOLOWER(rst.nextb);
+ else
+ rst.nextb_ic = MB_TOUPPER(rst.nextb);
+ }
+ else
+ rst.nextb_ic = rst.nextb;
+ }
+ else
+ {
+ rst.nextb = NUL;
+ rst.nextb_ic = NUL;
+ }
+ if (op != BRACE_SIMPLE)
+ {
+ rst.minval = (op == STAR) ? 0 : 1;
+ rst.maxval = MAX_LIMIT;
+ }
+ else
+ {
+ rst.minval = bl_minval;
+ rst.maxval = bl_maxval;
+ }
+
+ // When maxval > minval, try matching as much as possible, up
+ // to maxval. When maxval < minval, try matching at least the
+ // minimal number (since the range is backwards, that's also
+ // maxval!).
+ rst.count = regrepeat(OPERAND(scan), rst.maxval);
+ if (got_int)
+ {
+ status = RA_FAIL;
+ break;
+ }
+ if (rst.minval <= rst.maxval
+ ? rst.count >= rst.minval : rst.count >= rst.maxval)
+ {
+ // It could match. Prepare for trying to match what
+ // follows. The code is below. Parameters are stored in
+ // a regstar_T on the regstack.
+ if ((long)((unsigned)regstack.ga_len >> 10) >= p_mmp)
+ {
+ emsg(_(e_pattern_uses_more_memory_than_maxmempattern));
+ status = RA_FAIL;
+ }
+ else if (ga_grow(&regstack, sizeof(regstar_T)) == FAIL)
+ status = RA_FAIL;
+ else
+ {
+ regstack.ga_len += sizeof(regstar_T);
+ rp = regstack_push(rst.minval <= rst.maxval
+ ? RS_STAR_LONG : RS_STAR_SHORT, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ *(((regstar_T *)rp) - 1) = rst;
+ status = RA_BREAK; // skip the restore bits
+ }
+ }
+ }
+ else
+ status = RA_NOMATCH;
+
+ }
+ break;
+
+ case NOMATCH:
+ case MATCH:
+ case SUBPAT:
+ rp = regstack_push(RS_NOMATCH, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ rp->rs_no = op;
+ reg_save(&rp->rs_un.regsave, &backpos);
+ next = OPERAND(scan);
+ // We continue and handle the result when done.
+ }
+ break;
+
+ case BEHIND:
+ case NOBEHIND:
+ // Need a bit of room to store extra positions.
+ if ((long)((unsigned)regstack.ga_len >> 10) >= p_mmp)
+ {
+ emsg(_(e_pattern_uses_more_memory_than_maxmempattern));
+ status = RA_FAIL;
+ }
+ else if (ga_grow(&regstack, sizeof(regbehind_T)) == FAIL)
+ status = RA_FAIL;
+ else
+ {
+ regstack.ga_len += sizeof(regbehind_T);
+ rp = regstack_push(RS_BEHIND1, scan);
+ if (rp == NULL)
+ status = RA_FAIL;
+ else
+ {
+ // Need to save the subexpr to be able to restore them
+ // when there is a match but we don't use it.
+ save_subexpr(((regbehind_T *)rp) - 1);
+
+ rp->rs_no = op;
+ reg_save(&rp->rs_un.regsave, &backpos);
+ // First try if what follows matches. If it does then we
+ // check the behind match by looping.
+ }
+ }
+ break;
+
+ case BHPOS:
+ if (REG_MULTI)
+ {
+ if (behind_pos.rs_u.pos.col != (colnr_T)(rex.input - rex.line)
+ || behind_pos.rs_u.pos.lnum != rex.lnum)
+ status = RA_NOMATCH;
+ }
+ else if (behind_pos.rs_u.ptr != rex.input)
+ status = RA_NOMATCH;
+ break;
+
+ case NEWL:
+ if ((c != NUL || !REG_MULTI || rex.lnum > rex.reg_maxline
+ || rex.reg_line_lbr)
+ && (c != '\n' || !rex.reg_line_lbr))
+ status = RA_NOMATCH;
+ else if (rex.reg_line_lbr)
+ ADVANCE_REGINPUT();
+ else
+ reg_nextline();
+ break;
+
+ case END:
+ status = RA_MATCH; // Success!
+ break;
+
+ default:
+ iemsg(e_corrupted_regexp_program);
+#ifdef DEBUG
+ printf("Illegal op code %d\n", op);
+#endif
+ status = RA_FAIL;
+ break;
+ }
+ }
+
+ // If we can't continue sequentially, break the inner loop.
+ if (status != RA_CONT)
+ break;
+
+ // Continue in inner loop, advance to next item.
+ scan = next;
+
+ } // end of inner loop
+
+ // If there is something on the regstack execute the code for the state.
+ // If the state is popped then loop and use the older state.
+ while (regstack.ga_len > 0 && status != RA_FAIL)
+ {
+ rp = (regitem_T *)((char *)regstack.ga_data + regstack.ga_len) - 1;
+ switch (rp->rs_state)
+ {
+ case RS_NOPEN:
+ // Result is passed on as-is, simply pop the state.
+ regstack_pop(&scan);
+ break;
+
+ case RS_MOPEN:
+ // Pop the state. Restore pointers when there is no match.
+ if (status == RA_NOMATCH)
+ restore_se(&rp->rs_un.sesave, &rex.reg_startpos[rp->rs_no],
+ &rex.reg_startp[rp->rs_no]);
+ regstack_pop(&scan);
+ break;
+
+#ifdef FEAT_SYN_HL
+ case RS_ZOPEN:
+ // Pop the state. Restore pointers when there is no match.
+ if (status == RA_NOMATCH)
+ restore_se(&rp->rs_un.sesave, &reg_startzpos[rp->rs_no],
+ &reg_startzp[rp->rs_no]);
+ regstack_pop(&scan);
+ break;
+#endif
+
+ case RS_MCLOSE:
+ // Pop the state. Restore pointers when there is no match.
+ if (status == RA_NOMATCH)
+ restore_se(&rp->rs_un.sesave, &rex.reg_endpos[rp->rs_no],
+ &rex.reg_endp[rp->rs_no]);
+ regstack_pop(&scan);
+ break;
+
+#ifdef FEAT_SYN_HL
+ case RS_ZCLOSE:
+ // Pop the state. Restore pointers when there is no match.
+ if (status == RA_NOMATCH)
+ restore_se(&rp->rs_un.sesave, &reg_endzpos[rp->rs_no],
+ &reg_endzp[rp->rs_no]);
+ regstack_pop(&scan);
+ break;
+#endif
+
+ case RS_BRANCH:
+ if (status == RA_MATCH)
+ // this branch matched, use it
+ regstack_pop(&scan);
+ else
+ {
+ if (status != RA_BREAK)
+ {
+ // After a non-matching branch: try next one.
+ reg_restore(&rp->rs_un.regsave, &backpos);
+ scan = rp->rs_scan;
+ }
+ if (scan == NULL || OP(scan) != BRANCH)
+ {
+ // no more branches, didn't find a match
+ status = RA_NOMATCH;
+ regstack_pop(&scan);
+ }
+ else
+ {
+ // Prepare to try a branch.
+ rp->rs_scan = regnext(scan);
+ reg_save(&rp->rs_un.regsave, &backpos);
+ scan = OPERAND(scan);
+ }
+ }
+ break;
+
+ case RS_BRCPLX_MORE:
+ // Pop the state. Restore pointers when there is no match.
+ if (status == RA_NOMATCH)
+ {
+ reg_restore(&rp->rs_un.regsave, &backpos);
+ --brace_count[rp->rs_no]; // decrement match count
+ }
+ regstack_pop(&scan);
+ break;
+
+ case RS_BRCPLX_LONG:
+ // Pop the state. Restore pointers when there is no match.
+ if (status == RA_NOMATCH)
+ {
+ // There was no match, but we did find enough matches.
+ reg_restore(&rp->rs_un.regsave, &backpos);
+ --brace_count[rp->rs_no];
+ // continue with the items after "\{}"
+ status = RA_CONT;
+ }
+ regstack_pop(&scan);
+ if (status == RA_CONT)
+ scan = regnext(scan);
+ break;
+
+ case RS_BRCPLX_SHORT:
+ // Pop the state. Restore pointers when there is no match.
+ if (status == RA_NOMATCH)
+ // There was no match, try to match one more item.
+ reg_restore(&rp->rs_un.regsave, &backpos);
+ regstack_pop(&scan);
+ if (status == RA_NOMATCH)
+ {
+ scan = OPERAND(scan);
+ status = RA_CONT;
+ }
+ break;
+
+ case RS_NOMATCH:
+ // Pop the state. If the operand matches for NOMATCH or
+ // doesn't match for MATCH/SUBPAT, we fail. Otherwise backup,
+ // except for SUBPAT, and continue with the next item.
+ if (status == (rp->rs_no == NOMATCH ? RA_MATCH : RA_NOMATCH))
+ status = RA_NOMATCH;
+ else
+ {
+ status = RA_CONT;
+ if (rp->rs_no != SUBPAT) // zero-width
+ reg_restore(&rp->rs_un.regsave, &backpos);
+ }
+ regstack_pop(&scan);
+ if (status == RA_CONT)
+ scan = regnext(scan);
+ break;
+
+ case RS_BEHIND1:
+ if (status == RA_NOMATCH)
+ {
+ regstack_pop(&scan);
+ regstack.ga_len -= sizeof(regbehind_T);
+ }
+ else
+ {
+ // The stuff after BEHIND/NOBEHIND matches. Now try if
+ // the behind part does (not) match before the current
+ // position in the input. This must be done at every
+ // position in the input and checking if the match ends at
+ // the current position.
+
+ // save the position after the found match for next
+ reg_save(&(((regbehind_T *)rp) - 1)->save_after, &backpos);
+
+ // Start looking for a match with operand at the current
+ // position. Go back one character until we find the
+ // result, hitting the start of the line or the previous
+ // line (for multi-line matching).
+ // Set behind_pos to where the match should end, BHPOS
+ // will match it. Save the current value.
+ (((regbehind_T *)rp) - 1)->save_behind = behind_pos;
+ behind_pos = rp->rs_un.regsave;
+
+ rp->rs_state = RS_BEHIND2;
+
+ reg_restore(&rp->rs_un.regsave, &backpos);
+ scan = OPERAND(rp->rs_scan) + 4;
+ }
+ break;
+
+ case RS_BEHIND2:
+ // Looping for BEHIND / NOBEHIND match.
+ if (status == RA_MATCH && reg_save_equal(&behind_pos))
+ {
+ // found a match that ends where "next" started
+ behind_pos = (((regbehind_T *)rp) - 1)->save_behind;
+ if (rp->rs_no == BEHIND)
+ reg_restore(&(((regbehind_T *)rp) - 1)->save_after,
+ &backpos);
+ else
+ {
+ // But we didn't want a match. Need to restore the
+ // subexpr, because what follows matched, so they have
+ // been set.
+ status = RA_NOMATCH;
+ restore_subexpr(((regbehind_T *)rp) - 1);
+ }
+ regstack_pop(&scan);
+ regstack.ga_len -= sizeof(regbehind_T);
+ }
+ else
+ {
+ long limit;
+
+ // No match or a match that doesn't end where we want it: Go
+ // back one character. May go to previous line once.
+ no = OK;
+ limit = OPERAND_MIN(rp->rs_scan);
+ if (REG_MULTI)
+ {
+ if (limit > 0
+ && ((rp->rs_un.regsave.rs_u.pos.lnum
+ < behind_pos.rs_u.pos.lnum
+ ? (colnr_T)STRLEN(rex.line)
+ : behind_pos.rs_u.pos.col)
+ - rp->rs_un.regsave.rs_u.pos.col >= limit))
+ no = FAIL;
+ else if (rp->rs_un.regsave.rs_u.pos.col == 0)
+ {
+ if (rp->rs_un.regsave.rs_u.pos.lnum
+ < behind_pos.rs_u.pos.lnum
+ || reg_getline(
+ --rp->rs_un.regsave.rs_u.pos.lnum)
+ == NULL)
+ no = FAIL;
+ else
+ {
+ reg_restore(&rp->rs_un.regsave, &backpos);
+ rp->rs_un.regsave.rs_u.pos.col =
+ (colnr_T)STRLEN(rex.line);
+ }
+ }
+ else
+ {
+ if (has_mbyte)
+ {
+ char_u *line =
+ reg_getline(rp->rs_un.regsave.rs_u.pos.lnum);
+
+ rp->rs_un.regsave.rs_u.pos.col -=
+ (*mb_head_off)(line, line
+ + rp->rs_un.regsave.rs_u.pos.col - 1) + 1;
+ }
+ else
+ --rp->rs_un.regsave.rs_u.pos.col;
+ }
+ }
+ else
+ {
+ if (rp->rs_un.regsave.rs_u.ptr == rex.line)
+ no = FAIL;
+ else
+ {
+ MB_PTR_BACK(rex.line, rp->rs_un.regsave.rs_u.ptr);
+ if (limit > 0 && (long)(behind_pos.rs_u.ptr
+ - rp->rs_un.regsave.rs_u.ptr) > limit)
+ no = FAIL;
+ }
+ }
+ if (no == OK)
+ {
+ // Advanced, prepare for finding match again.
+ reg_restore(&rp->rs_un.regsave, &backpos);
+ scan = OPERAND(rp->rs_scan) + 4;
+ if (status == RA_MATCH)
+ {
+ // We did match, so subexpr may have been changed,
+ // need to restore them for the next try.
+ status = RA_NOMATCH;
+ restore_subexpr(((regbehind_T *)rp) - 1);
+ }
+ }
+ else
+ {
+ // Can't advance. For NOBEHIND that's a match.
+ behind_pos = (((regbehind_T *)rp) - 1)->save_behind;
+ if (rp->rs_no == NOBEHIND)
+ {
+ reg_restore(&(((regbehind_T *)rp) - 1)->save_after,
+ &backpos);
+ status = RA_MATCH;
+ }
+ else
+ {
+ // We do want a proper match. Need to restore the
+ // subexpr if we had a match, because they may have
+ // been set.
+ if (status == RA_MATCH)
+ {
+ status = RA_NOMATCH;
+ restore_subexpr(((regbehind_T *)rp) - 1);
+ }
+ }
+ regstack_pop(&scan);
+ regstack.ga_len -= sizeof(regbehind_T);
+ }
+ }
+ break;
+
+ case RS_STAR_LONG:
+ case RS_STAR_SHORT:
+ {
+ regstar_T *rst = ((regstar_T *)rp) - 1;
+
+ if (status == RA_MATCH)
+ {
+ regstack_pop(&scan);
+ regstack.ga_len -= sizeof(regstar_T);
+ break;
+ }
+
+ // Tried once already, restore input pointers.
+ if (status != RA_BREAK)
+ reg_restore(&rp->rs_un.regsave, &backpos);
+
+ // Repeat until we found a position where it could match.
+ for (;;)
+ {
+ if (status != RA_BREAK)
+ {
+ // Tried first position already, advance.
+ if (rp->rs_state == RS_STAR_LONG)
+ {
+ // Trying for longest match, but couldn't or
+ // didn't match -- back up one char.
+ if (--rst->count < rst->minval)
+ break;
+ if (rex.input == rex.line)
+ {
+ // backup to last char of previous line
+ if (rex.lnum == 0)
+ {
+ status = RA_NOMATCH;
+ break;
+ }
+ --rex.lnum;
+ rex.line = reg_getline(rex.lnum);
+ // Just in case regrepeat() didn't count
+ // right.
+ if (rex.line == NULL)
+ break;
+ rex.input = rex.line + STRLEN(rex.line);
+ fast_breakcheck();
+ }
+ else
+ MB_PTR_BACK(rex.line, rex.input);
+ }
+ else
+ {
+ // Range is backwards, use shortest match first.
+ // Careful: maxval and minval are exchanged!
+ // Couldn't or didn't match: try advancing one
+ // char.
+ if (rst->count == rst->minval
+ || regrepeat(OPERAND(rp->rs_scan), 1L) == 0)
+ break;
+ ++rst->count;
+ }
+ if (got_int)
+ break;
+ }
+ else
+ status = RA_NOMATCH;
+
+ // If it could match, try it.
+ if (rst->nextb == NUL || *rex.input == rst->nextb
+ || *rex.input == rst->nextb_ic)
+ {
+ reg_save(&rp->rs_un.regsave, &backpos);
+ scan = regnext(rp->rs_scan);
+ status = RA_CONT;
+ break;
+ }
+ }
+ if (status != RA_CONT)
+ {
+ // Failed.
+ regstack_pop(&scan);
+ regstack.ga_len -= sizeof(regstar_T);
+ status = RA_NOMATCH;
+ }
+ }
+ break;
+ }
+
+ // If we want to continue the inner loop or didn't pop a state
+ // continue matching loop
+ if (status == RA_CONT || rp == (regitem_T *)
+ ((char *)regstack.ga_data + regstack.ga_len) - 1)
+ break;
+
+#ifdef FEAT_RELTIME
+ if (bt_did_time_out(timed_out))
+ {
+ status = RA_FAIL;
+ break;
+ }
+#endif
+ }
+
+ // May need to continue with the inner loop, starting at "scan".
+ if (status == RA_CONT)
+ continue;
+
+ // If the regstack is empty or something failed we are done.
+ if (regstack.ga_len == 0 || status == RA_FAIL)
+ {
+ if (scan == NULL)
+ {
+ // We get here only if there's trouble -- normally "case END" is
+ // the terminating point.
+ iemsg(e_corrupted_regexp_program);
+#ifdef DEBUG
+ printf("Premature EOL\n");
+#endif
+ }
+ return (status == RA_MATCH);
+ }
+
+ } // End of loop until the regstack is empty.
+
+ // NOTREACHED
+}
+
+/*
+ * regtry - try match of "prog" with at rex.line["col"].
+ * Returns 0 for failure, number of lines contained in the match otherwise.
+ */
+ static long
+regtry(
+ bt_regprog_T *prog,
+ colnr_T col,
+ int *timed_out) // flag set on timeout or NULL
+{
+ rex.input = rex.line + col;
+ rex.need_clear_subexpr = TRUE;
+#ifdef FEAT_SYN_HL
+ // Clear the external match subpointers if necessary.
+ rex.need_clear_zsubexpr = (prog->reghasz == REX_SET);
+#endif
+
+ if (regmatch(prog->program + 1, timed_out) == 0)
+ return 0;
+
+ cleanup_subexpr();
+ if (REG_MULTI)
+ {
+ if (rex.reg_startpos[0].lnum < 0)
+ {
+ rex.reg_startpos[0].lnum = 0;
+ rex.reg_startpos[0].col = col;
+ }
+ if (rex.reg_endpos[0].lnum < 0)
+ {
+ rex.reg_endpos[0].lnum = rex.lnum;
+ rex.reg_endpos[0].col = (int)(rex.input - rex.line);
+ }
+ else
+ // Use line number of "\ze".
+ rex.lnum = rex.reg_endpos[0].lnum;
+ }
+ else
+ {
+ if (rex.reg_startp[0] == NULL)
+ rex.reg_startp[0] = rex.line + col;
+ if (rex.reg_endp[0] == NULL)
+ rex.reg_endp[0] = rex.input;
+ }
+#ifdef FEAT_SYN_HL
+ // Package any found \z(...\) matches for export. Default is none.
+ unref_extmatch(re_extmatch_out);
+ re_extmatch_out = NULL;
+
+ if (prog->reghasz == REX_SET)
+ {
+ int i;
+
+ cleanup_zsubexpr();
+ re_extmatch_out = make_extmatch();
+ if (re_extmatch_out == NULL)
+ return 0;
+ for (i = 0; i < NSUBEXP; i++)
+ {
+ if (REG_MULTI)
+ {
+ // Only accept single line matches.
+ if (reg_startzpos[i].lnum >= 0
+ && reg_endzpos[i].lnum == reg_startzpos[i].lnum
+ && reg_endzpos[i].col >= reg_startzpos[i].col)
+ re_extmatch_out->matches[i] =
+ vim_strnsave(reg_getline(reg_startzpos[i].lnum)
+ + reg_startzpos[i].col,
+ reg_endzpos[i].col - reg_startzpos[i].col);
+ }
+ else
+ {
+ if (reg_startzp[i] != NULL && reg_endzp[i] != NULL)
+ re_extmatch_out->matches[i] =
+ vim_strnsave(reg_startzp[i],
+ reg_endzp[i] - reg_startzp[i]);
+ }
+ }
+ }
+#endif
+ return 1 + rex.lnum;
+}
+
+/*
+ * Match a regexp against a string ("line" points to the string) or multiple
+ * lines (if "line" is NULL, use reg_getline()).
+ * Returns 0 for failure, number of lines contained in the match otherwise.
+ */
+ static long
+bt_regexec_both(
+ char_u *line,
+ colnr_T startcol, // column to start looking for match
+ int *timed_out) // flag set on timeout or NULL
+{
+ bt_regprog_T *prog;
+ char_u *s;
+ colnr_T col = startcol;
+ long retval = 0L;
+
+ // Create "regstack" and "backpos" if they are not allocated yet.
+ // We allocate *_INITIAL amount of bytes first and then set the grow size
+ // to much bigger value to avoid many malloc calls in case of deep regular
+ // expressions.
+ if (regstack.ga_data == NULL)
+ {
+ // Use an item size of 1 byte, since we push different things
+ // onto the regstack.
+ ga_init2(&regstack, 1, REGSTACK_INITIAL);
+ (void)ga_grow(&regstack, REGSTACK_INITIAL);
+ regstack.ga_growsize = REGSTACK_INITIAL * 8;
+ }
+
+ if (backpos.ga_data == NULL)
+ {
+ ga_init2(&backpos, sizeof(backpos_T), BACKPOS_INITIAL);
+ (void)ga_grow(&backpos, BACKPOS_INITIAL);
+ backpos.ga_growsize = BACKPOS_INITIAL * 8;
+ }
+
+ if (REG_MULTI)
+ {
+ prog = (bt_regprog_T *)rex.reg_mmatch->regprog;
+ line = reg_getline((linenr_T)0);
+ rex.reg_startpos = rex.reg_mmatch->startpos;
+ rex.reg_endpos = rex.reg_mmatch->endpos;
+ }
+ else
+ {
+ prog = (bt_regprog_T *)rex.reg_match->regprog;
+ rex.reg_startp = rex.reg_match->startp;
+ rex.reg_endp = rex.reg_match->endp;
+ }
+
+ // Be paranoid...
+ if (prog == NULL || line == NULL)
+ {
+ iemsg(e_null_argument);
+ goto theend;
+ }
+
+ // Check validity of program.
+ if (prog_magic_wrong())
+ goto theend;
+
+ // If the start column is past the maximum column: no need to try.
+ if (rex.reg_maxcol > 0 && col >= rex.reg_maxcol)
+ goto theend;
+
+ // If pattern contains "\c" or "\C": overrule value of rex.reg_ic
+ if (prog->regflags & RF_ICASE)
+ rex.reg_ic = TRUE;
+ else if (prog->regflags & RF_NOICASE)
+ rex.reg_ic = FALSE;
+
+ // If pattern contains "\Z" overrule value of rex.reg_icombine
+ if (prog->regflags & RF_ICOMBINE)
+ rex.reg_icombine = TRUE;
+
+ // If there is a "must appear" string, look for it.
+ if (prog->regmust != NULL)
+ {
+ int c;
+
+ if (has_mbyte)
+ c = (*mb_ptr2char)(prog->regmust);
+ else
+ c = *prog->regmust;
+ s = line + col;
+
+ // This is used very often, esp. for ":global". Use three versions of
+ // the loop to avoid overhead of conditions.
+ if (!rex.reg_ic && !has_mbyte)
+ while ((s = vim_strbyte(s, c)) != NULL)
+ {
+ if (cstrncmp(s, prog->regmust, &prog->regmlen) == 0)
+ break; // Found it.
+ ++s;
+ }
+ else if (!rex.reg_ic || (!enc_utf8 && mb_char2len(c) > 1))
+ while ((s = vim_strchr(s, c)) != NULL)
+ {
+ if (cstrncmp(s, prog->regmust, &prog->regmlen) == 0)
+ break; // Found it.
+ MB_PTR_ADV(s);
+ }
+ else
+ while ((s = cstrchr(s, c)) != NULL)
+ {
+ if (cstrncmp(s, prog->regmust, &prog->regmlen) == 0)
+ break; // Found it.
+ MB_PTR_ADV(s);
+ }
+ if (s == NULL) // Not present.
+ goto theend;
+ }
+
+ rex.line = line;
+ rex.lnum = 0;
+ reg_toolong = FALSE;
+
+ // Simplest case: Anchored match need be tried only once.
+ if (prog->reganch)
+ {
+ int c;
+
+ if (has_mbyte)
+ c = (*mb_ptr2char)(rex.line + col);
+ else
+ c = rex.line[col];
+ if (prog->regstart == NUL
+ || prog->regstart == c
+ || (rex.reg_ic
+ && (((enc_utf8 && utf_fold(prog->regstart) == utf_fold(c)))
+ || (c < 255 && prog->regstart < 255 &&
+ MB_TOLOWER(prog->regstart) == MB_TOLOWER(c)))))
+ retval = regtry(prog, col, timed_out);
+ else
+ retval = 0;
+ }
+ else
+ {
+ // Messy cases: unanchored match.
+ while (!got_int)
+ {
+ if (prog->regstart != NUL)
+ {
+ // Skip until the char we know it must start with.
+ // Used often, do some work to avoid call overhead.
+ if (!rex.reg_ic && !has_mbyte)
+ s = vim_strbyte(rex.line + col, prog->regstart);
+ else
+ s = cstrchr(rex.line + col, prog->regstart);
+ if (s == NULL)
+ {
+ retval = 0;
+ break;
+ }
+ col = (int)(s - rex.line);
+ }
+
+ // Check for maximum column to try.
+ if (rex.reg_maxcol > 0 && col >= rex.reg_maxcol)
+ {
+ retval = 0;
+ break;
+ }
+
+ retval = regtry(prog, col, timed_out);
+ if (retval > 0)
+ break;
+
+ // if not currently on the first line, get it again
+ if (rex.lnum != 0)
+ {
+ rex.lnum = 0;
+ rex.line = reg_getline((linenr_T)0);
+ }
+ if (rex.line[col] == NUL)
+ break;
+ if (has_mbyte)
+ col += (*mb_ptr2len)(rex.line + col);
+ else
+ ++col;
+#ifdef FEAT_RELTIME
+ if (bt_did_time_out(timed_out))
+ break;
+#endif
+ }
+ }
+
+theend:
+ // Free "reg_tofree" when it's a bit big.
+ // Free regstack and backpos if they are bigger than their initial size.
+ if (reg_tofreelen > 400)
+ VIM_CLEAR(reg_tofree);
+ if (regstack.ga_maxlen > REGSTACK_INITIAL)
+ ga_clear(&regstack);
+ if (backpos.ga_maxlen > BACKPOS_INITIAL)
+ ga_clear(&backpos);
+
+ if (retval > 0)
+ {
+ // Make sure the end is never before the start. Can happen when \zs
+ // and \ze are used.
+ if (REG_MULTI)
+ {
+ lpos_T *start = &rex.reg_mmatch->startpos[0];
+ lpos_T *end = &rex.reg_mmatch->endpos[0];
+
+ if (end->lnum < start->lnum
+ || (end->lnum == start->lnum && end->col < start->col))
+ rex.reg_mmatch->endpos[0] = rex.reg_mmatch->startpos[0];
+
+ // startpos[0] may be set by "\zs", also return the column where
+ // the whole pattern matched.
+ rex.reg_mmatch->rmm_matchcol = col;
+ }
+ else
+ {
+ if (rex.reg_match->endp[0] < rex.reg_match->startp[0])
+ rex.reg_match->endp[0] = rex.reg_match->startp[0];
+
+ // startpos[0] may be set by "\zs", also return the column where
+ // the whole pattern matched.
+ rex.reg_match->rm_matchcol = col;
+ }
+ }
+
+ return retval;
+}
+
+/*
+ * Match a regexp against a string.
+ * "rmp->regprog" is a compiled regexp as returned by vim_regcomp().
+ * Uses curbuf for line count and 'iskeyword'.
+ * if "line_lbr" is TRUE consider a "\n" in "line" to be a line break.
+ *
+ * Returns 0 for failure, number of lines contained in the match otherwise.
+ */
+ static int
+bt_regexec_nl(
+ regmatch_T *rmp,
+ char_u *line, // string to match against
+ colnr_T col, // column to start looking for match
+ int line_lbr)
+{
+ rex.reg_match = rmp;
+ rex.reg_mmatch = NULL;
+ rex.reg_maxline = 0;
+ rex.reg_line_lbr = line_lbr;
+ rex.reg_buf = curbuf;
+ rex.reg_win = NULL;
+ rex.reg_ic = rmp->rm_ic;
+ rex.reg_icombine = FALSE;
+ rex.reg_maxcol = 0;
+
+ return bt_regexec_both(line, col, NULL);
+}
+
+/*
+ * Match a regexp against multiple lines.
+ * "rmp->regprog" is a compiled regexp as returned by vim_regcomp().
+ * Uses curbuf for line count and 'iskeyword'.
+ *
+ * Return zero if there is no match. Return number of lines contained in the
+ * match otherwise.
+ */
+ static long
+bt_regexec_multi(
+ regmmatch_T *rmp,
+ win_T *win, // window in which to search or NULL
+ buf_T *buf, // buffer in which to search
+ linenr_T lnum, // nr of line to start looking for match
+ colnr_T col, // column to start looking for match
+ int *timed_out) // flag set on timeout or NULL
+{
+ init_regexec_multi(rmp, win, buf, lnum);
+ return bt_regexec_both(NULL, col, timed_out);
+}
+
+/*
+ * Compare a number with the operand of RE_LNUM, RE_COL or RE_VCOL.
+ */
+ static int
+re_num_cmp(long_u val, char_u *scan)
+{
+ long_u n = OPERAND_MIN(scan);
+
+ if (OPERAND_CMP(scan) == '>')
+ return val > n;
+ if (OPERAND_CMP(scan) == '<')
+ return val < n;
+ return val == n;
+}
+
+#ifdef BT_REGEXP_DUMP
+
+/*
+ * regdump - dump a regexp onto stdout in vaguely comprehensible form
+ */
+ static void
+regdump(char_u *pattern, bt_regprog_T *r)
+{
+ char_u *s;
+ int op = EXACTLY; // Arbitrary non-END op.
+ char_u *next;
+ char_u *end = NULL;
+ FILE *f;
+
+#ifdef BT_REGEXP_LOG
+ f = fopen("bt_regexp_log.log", "a");
+#else
+ f = stdout;
+#endif
+ if (f == NULL)
+ return;
+ fprintf(f, "-------------------------------------\n\r\nregcomp(%s):\r\n", pattern);
+
+ s = r->program + 1;
+ // Loop until we find the END that isn't before a referred next (an END
+ // can also appear in a NOMATCH operand).
+ while (op != END || s <= end)
+ {
+ op = OP(s);
+ fprintf(f, "%2d%s", (int)(s - r->program), regprop(s)); // Where, what.
+ next = regnext(s);
+ if (next == NULL) // Next ptr.
+ fprintf(f, "(0)");
+ else
+ fprintf(f, "(%d)", (int)((s - r->program) + (next - s)));
+ if (end < next)
+ end = next;
+ if (op == BRACE_LIMITS)
+ {
+ // Two ints
+ fprintf(f, " minval %ld, maxval %ld", OPERAND_MIN(s), OPERAND_MAX(s));
+ s += 8;
+ }
+ else if (op == BEHIND || op == NOBEHIND)
+ {
+ // one int
+ fprintf(f, " count %ld", OPERAND_MIN(s));
+ s += 4;
+ }
+ else if (op == RE_LNUM || op == RE_COL || op == RE_VCOL)
+ {
+ // one int plus comparator
+ fprintf(f, " count %ld", OPERAND_MIN(s));
+ s += 5;
+ }
+ s += 3;
+ if (op == ANYOF || op == ANYOF + ADD_NL
+ || op == ANYBUT || op == ANYBUT + ADD_NL
+ || op == EXACTLY)
+ {
+ // Literal string, where present.
+ fprintf(f, "\nxxxxxxxxx\n");
+ while (*s != NUL)
+ fprintf(f, "%c", *s++);
+ fprintf(f, "\nxxxxxxxxx\n");
+ s++;
+ }
+ fprintf(f, "\r\n");
+ }
+
+ // Header fields of interest.
+ if (r->regstart != NUL)
+ fprintf(f, "start `%s' 0x%x; ", r->regstart < 256
+ ? (char *)transchar(r->regstart)
+ : "multibyte", r->regstart);
+ if (r->reganch)
+ fprintf(f, "anchored; ");
+ if (r->regmust != NULL)
+ fprintf(f, "must have \"%s\"", r->regmust);
+ fprintf(f, "\r\n");
+
+#ifdef BT_REGEXP_LOG
+ fclose(f);
+#endif
+}
+#endif // BT_REGEXP_DUMP
+
+#ifdef DEBUG
+/*
+ * regprop - printable representation of opcode
+ */
+ static char_u *
+regprop(char_u *op)
+{
+ char *p;
+ static char buf[50];
+
+ STRCPY(buf, ":");
+
+ switch ((int) OP(op))
+ {
+ case BOL:
+ p = "BOL";
+ break;
+ case EOL:
+ p = "EOL";
+ break;
+ case RE_BOF:
+ p = "BOF";
+ break;
+ case RE_EOF:
+ p = "EOF";
+ break;
+ case CURSOR:
+ p = "CURSOR";
+ break;
+ case RE_VISUAL:
+ p = "RE_VISUAL";
+ break;
+ case RE_LNUM:
+ p = "RE_LNUM";
+ break;
+ case RE_MARK:
+ p = "RE_MARK";
+ break;
+ case RE_COL:
+ p = "RE_COL";
+ break;
+ case RE_VCOL:
+ p = "RE_VCOL";
+ break;
+ case BOW:
+ p = "BOW";
+ break;
+ case EOW:
+ p = "EOW";
+ break;
+ case ANY:
+ p = "ANY";
+ break;
+ case ANY + ADD_NL:
+ p = "ANY+NL";
+ break;
+ case ANYOF:
+ p = "ANYOF";
+ break;
+ case ANYOF + ADD_NL:
+ p = "ANYOF+NL";
+ break;
+ case ANYBUT:
+ p = "ANYBUT";
+ break;
+ case ANYBUT + ADD_NL:
+ p = "ANYBUT+NL";
+ break;
+ case IDENT:
+ p = "IDENT";
+ break;
+ case IDENT + ADD_NL:
+ p = "IDENT+NL";
+ break;
+ case SIDENT:
+ p = "SIDENT";
+ break;
+ case SIDENT + ADD_NL:
+ p = "SIDENT+NL";
+ break;
+ case KWORD:
+ p = "KWORD";
+ break;
+ case KWORD + ADD_NL:
+ p = "KWORD+NL";
+ break;
+ case SKWORD:
+ p = "SKWORD";
+ break;
+ case SKWORD + ADD_NL:
+ p = "SKWORD+NL";
+ break;
+ case FNAME:
+ p = "FNAME";
+ break;
+ case FNAME + ADD_NL:
+ p = "FNAME+NL";
+ break;
+ case SFNAME:
+ p = "SFNAME";
+ break;
+ case SFNAME + ADD_NL:
+ p = "SFNAME+NL";
+ break;
+ case PRINT:
+ p = "PRINT";
+ break;
+ case PRINT + ADD_NL:
+ p = "PRINT+NL";
+ break;
+ case SPRINT:
+ p = "SPRINT";
+ break;
+ case SPRINT + ADD_NL:
+ p = "SPRINT+NL";
+ break;
+ case WHITE:
+ p = "WHITE";
+ break;
+ case WHITE + ADD_NL:
+ p = "WHITE+NL";
+ break;
+ case NWHITE:
+ p = "NWHITE";
+ break;
+ case NWHITE + ADD_NL:
+ p = "NWHITE+NL";
+ break;
+ case DIGIT:
+ p = "DIGIT";
+ break;
+ case DIGIT + ADD_NL:
+ p = "DIGIT+NL";
+ break;
+ case NDIGIT:
+ p = "NDIGIT";
+ break;
+ case NDIGIT + ADD_NL:
+ p = "NDIGIT+NL";
+ break;
+ case HEX:
+ p = "HEX";
+ break;
+ case HEX + ADD_NL:
+ p = "HEX+NL";
+ break;
+ case NHEX:
+ p = "NHEX";
+ break;
+ case NHEX + ADD_NL:
+ p = "NHEX+NL";
+ break;
+ case OCTAL:
+ p = "OCTAL";
+ break;
+ case OCTAL + ADD_NL:
+ p = "OCTAL+NL";
+ break;
+ case NOCTAL:
+ p = "NOCTAL";
+ break;
+ case NOCTAL + ADD_NL:
+ p = "NOCTAL+NL";
+ break;
+ case WORD:
+ p = "WORD";
+ break;
+ case WORD + ADD_NL:
+ p = "WORD+NL";
+ break;
+ case NWORD:
+ p = "NWORD";
+ break;
+ case NWORD + ADD_NL:
+ p = "NWORD+NL";
+ break;
+ case HEAD:
+ p = "HEAD";
+ break;
+ case HEAD + ADD_NL:
+ p = "HEAD+NL";
+ break;
+ case NHEAD:
+ p = "NHEAD";
+ break;
+ case NHEAD + ADD_NL:
+ p = "NHEAD+NL";
+ break;
+ case ALPHA:
+ p = "ALPHA";
+ break;
+ case ALPHA + ADD_NL:
+ p = "ALPHA+NL";
+ break;
+ case NALPHA:
+ p = "NALPHA";
+ break;
+ case NALPHA + ADD_NL:
+ p = "NALPHA+NL";
+ break;
+ case LOWER:
+ p = "LOWER";
+ break;
+ case LOWER + ADD_NL:
+ p = "LOWER+NL";
+ break;
+ case NLOWER:
+ p = "NLOWER";
+ break;
+ case NLOWER + ADD_NL:
+ p = "NLOWER+NL";
+ break;
+ case UPPER:
+ p = "UPPER";
+ break;
+ case UPPER + ADD_NL:
+ p = "UPPER+NL";
+ break;
+ case NUPPER:
+ p = "NUPPER";
+ break;
+ case NUPPER + ADD_NL:
+ p = "NUPPER+NL";
+ break;
+ case BRANCH:
+ p = "BRANCH";
+ break;
+ case EXACTLY:
+ p = "EXACTLY";
+ break;
+ case NOTHING:
+ p = "NOTHING";
+ break;
+ case BACK:
+ p = "BACK";
+ break;
+ case END:
+ p = "END";
+ break;
+ case MOPEN + 0:
+ p = "MATCH START";
+ break;
+ case MOPEN + 1:
+ case MOPEN + 2:
+ case MOPEN + 3:
+ case MOPEN + 4:
+ case MOPEN + 5:
+ case MOPEN + 6:
+ case MOPEN + 7:
+ case MOPEN + 8:
+ case MOPEN + 9:
+ sprintf(buf + STRLEN(buf), "MOPEN%d", OP(op) - MOPEN);
+ p = NULL;
+ break;
+ case MCLOSE + 0:
+ p = "MATCH END";
+ break;
+ case MCLOSE + 1:
+ case MCLOSE + 2:
+ case MCLOSE + 3:
+ case MCLOSE + 4:
+ case MCLOSE + 5:
+ case MCLOSE + 6:
+ case MCLOSE + 7:
+ case MCLOSE + 8:
+ case MCLOSE + 9:
+ sprintf(buf + STRLEN(buf), "MCLOSE%d", OP(op) - MCLOSE);
+ p = NULL;
+ break;
+ case BACKREF + 1:
+ case BACKREF + 2:
+ case BACKREF + 3:
+ case BACKREF + 4:
+ case BACKREF + 5:
+ case BACKREF + 6:
+ case BACKREF + 7:
+ case BACKREF + 8:
+ case BACKREF + 9:
+ sprintf(buf + STRLEN(buf), "BACKREF%d", OP(op) - BACKREF);
+ p = NULL;
+ break;
+ case NOPEN:
+ p = "NOPEN";
+ break;
+ case NCLOSE:
+ p = "NCLOSE";
+ break;
+#ifdef FEAT_SYN_HL
+ case ZOPEN + 1:
+ case ZOPEN + 2:
+ case ZOPEN + 3:
+ case ZOPEN + 4:
+ case ZOPEN + 5:
+ case ZOPEN + 6:
+ case ZOPEN + 7:
+ case ZOPEN + 8:
+ case ZOPEN + 9:
+ sprintf(buf + STRLEN(buf), "ZOPEN%d", OP(op) - ZOPEN);
+ p = NULL;
+ break;
+ case ZCLOSE + 1:
+ case ZCLOSE + 2:
+ case ZCLOSE + 3:
+ case ZCLOSE + 4:
+ case ZCLOSE + 5:
+ case ZCLOSE + 6:
+ case ZCLOSE + 7:
+ case ZCLOSE + 8:
+ case ZCLOSE + 9:
+ sprintf(buf + STRLEN(buf), "ZCLOSE%d", OP(op) - ZCLOSE);
+ p = NULL;
+ break;
+ case ZREF + 1:
+ case ZREF + 2:
+ case ZREF + 3:
+ case ZREF + 4:
+ case ZREF + 5:
+ case ZREF + 6:
+ case ZREF + 7:
+ case ZREF + 8:
+ case ZREF + 9:
+ sprintf(buf + STRLEN(buf), "ZREF%d", OP(op) - ZREF);
+ p = NULL;
+ break;
+#endif
+ case STAR:
+ p = "STAR";
+ break;
+ case PLUS:
+ p = "PLUS";
+ break;
+ case NOMATCH:
+ p = "NOMATCH";
+ break;
+ case MATCH:
+ p = "MATCH";
+ break;
+ case BEHIND:
+ p = "BEHIND";
+ break;
+ case NOBEHIND:
+ p = "NOBEHIND";
+ break;
+ case SUBPAT:
+ p = "SUBPAT";
+ break;
+ case BRACE_LIMITS:
+ p = "BRACE_LIMITS";
+ break;
+ case BRACE_SIMPLE:
+ p = "BRACE_SIMPLE";
+ break;
+ case BRACE_COMPLEX + 0:
+ case BRACE_COMPLEX + 1:
+ case BRACE_COMPLEX + 2:
+ case BRACE_COMPLEX + 3:
+ case BRACE_COMPLEX + 4:
+ case BRACE_COMPLEX + 5:
+ case BRACE_COMPLEX + 6:
+ case BRACE_COMPLEX + 7:
+ case BRACE_COMPLEX + 8:
+ case BRACE_COMPLEX + 9:
+ sprintf(buf + STRLEN(buf), "BRACE_COMPLEX%d", OP(op) - BRACE_COMPLEX);
+ p = NULL;
+ break;
+ case MULTIBYTECODE:
+ p = "MULTIBYTECODE";
+ break;
+ case NEWL:
+ p = "NEWL";
+ break;
+ default:
+ sprintf(buf + STRLEN(buf), "corrupt %d", OP(op));
+ p = NULL;
+ break;
+ }
+ if (p != NULL)
+ STRCAT(buf, p);
+ return (char_u *)buf;
+}
+#endif // DEBUG
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-07 10:00:59 +0000