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428
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1 /* Definitions for data structures and routines for the regular
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2 expression library, version 0.12.
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3
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4 Copyright (C) 1985, 89, 90, 91, 92, 93, 95 Free Software Foundation, Inc.
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826
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5 Copyright (C) 2002 Ben Wing.
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428
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6
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7 This program is free software; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 2, or (at your option)
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10 any later version.
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11
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12 This program is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with this program; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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22 /* Synched up with: FSF 19.29. */
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23
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440
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24 #ifndef INCLUDED_regex_h_
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25 #define INCLUDED_regex_h_
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428
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26
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446
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27 #ifdef emacs
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28 #define RE_TRANSLATE_TYPE Lisp_Object
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826
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29 #define RE_LISP_SHORT_CONTEXT_ARGS_DECL , Lisp_Object lispobj, struct buffer *lispbuf
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30 #define RE_LISP_SHORT_CONTEXT_ARGS , lispobj, lispbuf
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31 #define RE_LISP_CONTEXT_ARGS_DECL , Lisp_Object lispobj, struct buffer *lispbuf, struct syntax_cache *scache
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32 #define RE_LISP_CONTEXT_ARGS , lispobj, lispbuf, scache
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446
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33 #else
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34 #define RE_TRANSLATE_TYPE char *
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826
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35 #define RE_LISP_SHORT_CONTEXT_ARGS_DECL
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36 #define RE_LISP_SHORT_CONTEXT_ARGS
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37 #define RE_LISP_CONTEXT_ARGS_DECL
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38 #define RE_LISP_CONTEXT_ARGS
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665
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39 #define Elemcount ssize_t
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40 #define Bytecount ssize_t
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446
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41 #endif /* emacs */
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42
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428
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43 /* POSIX says that <sys/types.h> must be included (by the caller) before
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44 <regex.h>. */
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45
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46
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47 /* The following bits are used to determine the regexp syntax we
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48 recognize. The not-set meaning typically corresponds to the syntax
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49 used by Emacs (the exception is RE_INTERVAL, made for historical
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50 reasons). The bits are given in alphabetical order, and the
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51 definitions shifted by one from the previous bit; thus, when we add or
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52 remove a bit, only one other definition need change. */
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53 typedef unsigned reg_syntax_t;
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54
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55 /* If this bit is not set, then \ inside a bracket expression is literal.
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56 If set, then such a \ quotes the following character. */
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57 #define RE_BACKSLASH_ESCAPE_IN_LISTS (1)
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58
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59 /* If this bit is not set, then + and ? are operators, and \+ and \? are
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60 literals.
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61 If set, then \+ and \? are operators and + and ? are literals. */
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62 #define RE_BK_PLUS_QM (RE_BACKSLASH_ESCAPE_IN_LISTS << 1)
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63
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64 /* If this bit is set, then character classes are supported. They are:
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65 [:alpha:], [:upper:], [:lower:], [:digit:], [:alnum:], [:xdigit:],
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66 [:space:], [:print:], [:punct:], [:graph:], and [:cntrl:].
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67 If not set, then character classes are not supported. */
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68 #define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1)
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69
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70 /* If this bit is set, then ^ and $ are always anchors (outside bracket
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71 expressions, of course).
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72 If this bit is not set, then it depends:
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73 ^ is an anchor if it is at the beginning of a regular
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74 expression or after an open-group or an alternation operator;
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75 $ is an anchor if it is at the end of a regular expression, or
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76 before a close-group or an alternation operator.
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77
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78 This bit could be (re)combined with RE_CONTEXT_INDEP_OPS, because
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79 POSIX draft 11.2 says that * etc. in leading positions is undefined.
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80 We already implemented a previous draft which made those constructs
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81 invalid, though, so we haven't changed the code back. */
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82 #define RE_CONTEXT_INDEP_ANCHORS (RE_CHAR_CLASSES << 1)
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83
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84 /* If this bit is set, then special characters are always special
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85 regardless of where they are in the pattern.
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86 If this bit is not set, then special characters are special only in
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87 some contexts; otherwise they are ordinary. Specifically,
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88 * + ? and intervals are only special when not after the beginning,
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89 open-group, or alternation operator. */
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90 #define RE_CONTEXT_INDEP_OPS (RE_CONTEXT_INDEP_ANCHORS << 1)
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91
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92 /* If this bit is set, then *, +, ?, and { cannot be first in an re or
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93 immediately after an alternation or begin-group operator. */
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94 #define RE_CONTEXT_INVALID_OPS (RE_CONTEXT_INDEP_OPS << 1)
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95
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96 /* If this bit is set, then . matches newline.
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97 If not set, then it doesn't. */
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98 #define RE_DOT_NEWLINE (RE_CONTEXT_INVALID_OPS << 1)
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99
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100 /* If this bit is set, then . doesn't match NUL.
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101 If not set, then it does. */
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102 #define RE_DOT_NOT_NULL (RE_DOT_NEWLINE << 1)
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103
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104 /* If this bit is set, nonmatching lists [^...] do not match newline.
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105 If not set, they do. */
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106 #define RE_HAT_LISTS_NOT_NEWLINE (RE_DOT_NOT_NULL << 1)
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107
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108 /* If this bit is set, either \{...\} or {...} defines an
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109 interval, depending on RE_NO_BK_BRACES.
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110 If not set, \{, \}, {, and } are literals. */
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111 #define RE_INTERVALS (RE_HAT_LISTS_NOT_NEWLINE << 1)
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112
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113 /* If this bit is set, +, ? and | aren't recognized as operators.
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114 If not set, they are. */
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115 #define RE_LIMITED_OPS (RE_INTERVALS << 1)
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116
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117 /* If this bit is set, newline is an alternation operator.
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118 If not set, newline is literal. */
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119 #define RE_NEWLINE_ALT (RE_LIMITED_OPS << 1)
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120
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121 /* If this bit is set, then `{...}' defines an interval, and \{ and \}
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122 are literals.
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123 If not set, then `\{...\}' defines an interval. */
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124 #define RE_NO_BK_BRACES (RE_NEWLINE_ALT << 1)
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125
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126 /* If this bit is set, (...) defines a group, and \( and \) are literals.
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127 If not set, \(...\) defines a group, and ( and ) are literals. */
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128 #define RE_NO_BK_PARENS (RE_NO_BK_BRACES << 1)
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129
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130 /* If this bit is set, then \<digit> matches <digit>.
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131 If not set, then \<digit> is a back-reference. */
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132 #define RE_NO_BK_REFS (RE_NO_BK_PARENS << 1)
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133
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134 /* If this bit is set, then | is an alternation operator, and \| is literal.
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135 If not set, then \| is an alternation operator, and | is literal. */
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136 #define RE_NO_BK_VBAR (RE_NO_BK_REFS << 1)
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137
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138 /* If this bit is set, then an ending range point collating higher
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139 than the starting range point, as in [z-a], is invalid.
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140 If not set, then when ending range point collates higher than the
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141 starting range point, the range is ignored. */
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142 #define RE_NO_EMPTY_RANGES (RE_NO_BK_VBAR << 1)
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143
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144 /* If this bit is not set, allow minimal matching:
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145 - a*? and a+? and a?? perform shortest-possible matching (compare with a*
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146 and a+ and a?, respectively, which perform longest-possible matching)
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147 - other juxtaposing of * + and ? is rejected.
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148 If this bit is set, consecutive * + and ?'s are collapsed in a logical
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149 manner:
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150 - a*? and a+? are the same as a*
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151 - a?? is the same as a?
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152 */
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153 #define RE_NO_MINIMAL_MATCHING (RE_NO_EMPTY_RANGES << 1)
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154
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155 /* If this bit is set, succeed as soon as we match the whole pattern,
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156 without further backtracking. */
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157 #define RE_NO_POSIX_BACKTRACKING (RE_NO_MINIMAL_MATCHING << 1)
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158
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159 /* If this bit is not set, (?:re) behaves like (re) (or \(?:re\) behaves like
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160 \(re\)) except that the matched string is not registered. */
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161 #define RE_NO_SHY_GROUPS (RE_NO_POSIX_BACKTRACKING << 1)
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162
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163 /* If this bit is set, then an unmatched ) is ordinary.
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164 If not set, then an unmatched ) is invalid. */
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165 #define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_SHY_GROUPS << 1)
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166
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502
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167 /* If this bit is set, then \22 will read as a back reference,
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168 provided at least 22 non-shy groups have been seen so far. In all
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169 other cases (bit not set, not 22 non-shy groups seen so far), it
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170 reads as a back reference \2 followed by a digit 2. */
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171 #define RE_NO_MULTI_DIGIT_BK_REFS (RE_UNMATCHED_RIGHT_PAREN_ORD << 1)
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172
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428
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173 /* This global variable defines the particular regexp syntax to use (for
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174 some interfaces). When a regexp is compiled, the syntax used is
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175 stored in the pattern buffer, so changing this does not affect
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176 already-compiled regexps. */
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177 extern reg_syntax_t re_syntax_options;
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178
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179 /* Define combinations of the above bits for the standard possibilities.
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180 (The [[[ comments delimit what gets put into the Texinfo file, so
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181 don't delete them!) */
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182 /* [[[begin syntaxes]]] */
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183 #define RE_SYNTAX_EMACS RE_INTERVALS
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184
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185 #define RE_SYNTAX_AWK \
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186 (RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DOT_NOT_NULL \
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187 | RE_NO_BK_PARENS | RE_NO_BK_REFS \
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188 | RE_NO_BK_VBAR | RE_NO_EMPTY_RANGES \
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189 | RE_UNMATCHED_RIGHT_PAREN_ORD | RE_NO_SHY_GROUPS \
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502
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190 | RE_NO_MINIMAL_MATCHING | RE_NO_MULTI_DIGIT_BK_REFS)
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428
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191
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192 #define RE_SYNTAX_POSIX_AWK \
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193 (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS)
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194
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195 #define RE_SYNTAX_GREP \
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196 (RE_BK_PLUS_QM | RE_CHAR_CLASSES \
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197 | RE_HAT_LISTS_NOT_NEWLINE | RE_INTERVALS \
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198 | RE_NEWLINE_ALT | RE_NO_SHY_GROUPS \
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502
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199 | RE_NO_MINIMAL_MATCHING | RE_NO_MULTI_DIGIT_BK_REFS)
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428
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200
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201 #define RE_SYNTAX_EGREP \
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202 (RE_CHAR_CLASSES | RE_CONTEXT_INDEP_ANCHORS \
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203 | RE_CONTEXT_INDEP_OPS | RE_HAT_LISTS_NOT_NEWLINE \
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204 | RE_NEWLINE_ALT | RE_NO_BK_PARENS \
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205 | RE_NO_BK_VBAR | RE_NO_SHY_GROUPS \
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502
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206 | RE_NO_MINIMAL_MATCHING | RE_NO_MULTI_DIGIT_BK_REFS)
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428
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207
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208 #define RE_SYNTAX_POSIX_EGREP \
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502
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209 (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES | \
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210 RE_NO_MULTI_DIGIT_BK_REFS)
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428
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211
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212 /* P1003.2/D11.2, section 4.20.7.1, lines 5078ff. */
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213 #define RE_SYNTAX_ED RE_SYNTAX_POSIX_BASIC
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214
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215 #define RE_SYNTAX_SED RE_SYNTAX_POSIX_BASIC
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216
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217 /* Syntax bits common to both basic and extended POSIX regex syntax. */
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218 #define _RE_SYNTAX_POSIX_COMMON \
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219 (RE_CHAR_CLASSES | RE_DOT_NEWLINE | RE_DOT_NOT_NULL \
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220 | RE_INTERVALS | RE_NO_EMPTY_RANGES | RE_NO_SHY_GROUPS \
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502
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221 | RE_NO_MINIMAL_MATCHING | RE_NO_MULTI_DIGIT_BK_REFS)
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428
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222
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223 #define RE_SYNTAX_POSIX_BASIC \
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224 (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM)
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225
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226 /* Differs from ..._POSIX_BASIC only in that RE_BK_PLUS_QM becomes
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227 RE_LIMITED_OPS, i.e., \? \+ \| are not recognized. Actually, this
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228 isn't minimal, since other operators, such as \`, aren't disabled. */
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229 #define RE_SYNTAX_POSIX_MINIMAL_BASIC \
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230 (_RE_SYNTAX_POSIX_COMMON | RE_LIMITED_OPS)
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231
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232 #define RE_SYNTAX_POSIX_EXTENDED \
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233 (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \
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234 | RE_CONTEXT_INDEP_OPS | RE_NO_BK_BRACES \
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235 | RE_NO_BK_PARENS | RE_NO_BK_VBAR \
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236 | RE_UNMATCHED_RIGHT_PAREN_ORD)
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237
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238 /* Differs from ..._POSIX_EXTENDED in that RE_CONTEXT_INVALID_OPS
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239 replaces RE_CONTEXT_INDEP_OPS and RE_NO_BK_REFS is added. */
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240 #define RE_SYNTAX_POSIX_MINIMAL_EXTENDED \
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241 (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \
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242 | RE_CONTEXT_INVALID_OPS | RE_NO_BK_BRACES \
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243 | RE_NO_BK_PARENS | RE_NO_BK_REFS \
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244 | RE_NO_BK_VBAR | RE_UNMATCHED_RIGHT_PAREN_ORD)
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245 /* [[[end syntaxes]]] */
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246
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247 /* Maximum number of duplicates an interval can allow. Some systems
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248 (erroneously) define this in other header files, but we want our
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249 value, so remove any previous define. */
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250 #ifdef RE_DUP_MAX
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251 #undef RE_DUP_MAX
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252 #endif
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253 #define RE_DUP_MAX ((1 << 15) - 1)
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254
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255
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256 /* POSIX `cflags' bits (i.e., information for `regcomp'). */
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257
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258 /* If this bit is set, then use extended regular expression syntax.
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259 If not set, then use basic regular expression syntax. */
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260 #define REG_EXTENDED 1
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261
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262 /* If this bit is set, then ignore case when matching.
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263 If not set, then case is significant. */
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264 #define REG_ICASE (REG_EXTENDED << 1)
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265
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266 /* If this bit is set, then anchors do not match at newline
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267 characters in the string.
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268 If not set, then anchors do match at newlines. */
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269 #define REG_NEWLINE (REG_ICASE << 1)
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270
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271 /* If this bit is set, then report only success or fail in regexec.
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272 If not set, then returns differ between not matching and errors. */
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273 #define REG_NOSUB (REG_NEWLINE << 1)
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274
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275
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276 /* POSIX `eflags' bits (i.e., information for regexec). */
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277
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278 /* If this bit is set, then the beginning-of-line operator doesn't match
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279 the beginning of the string (presumably because it's not the
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280 beginning of a line).
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281 If not set, then the beginning-of-line operator does match the
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282 beginning of the string. */
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283 #define REG_NOTBOL 1
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284
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285 /* Like REG_NOTBOL, except for the end-of-line. */
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286 #define REG_NOTEOL (1 << 1)
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287
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288
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289 /* If any error codes are removed, changed, or added, update the
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290 `re_error_msg' table in regex.c. */
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291 typedef enum
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292 {
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293 REG_NOERROR = 0, /* Success. */
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294 REG_NOMATCH, /* Didn't find a match (for regexec). */
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295
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296 /* POSIX regcomp return error codes. (In the order listed in the
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297 standard.) */
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298 REG_BADPAT, /* Invalid pattern. */
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299 REG_ECOLLATE, /* Not implemented. */
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300 REG_ECTYPE, /* Invalid character class name. */
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301 REG_EESCAPE, /* Trailing backslash. */
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302 REG_ESUBREG, /* Invalid back reference. */
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303 REG_EBRACK, /* Unmatched left bracket. */
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304 REG_EPAREN, /* Parenthesis imbalance. */
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305 REG_EBRACE, /* Unmatched \{. */
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306 REG_BADBR, /* Invalid contents of \{\}. */
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307 REG_ERANGE, /* Invalid range end. */
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308 REG_ESPACE, /* Ran out of memory. */
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309 REG_BADRPT, /* No preceding re for repetition op. */
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310
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311 /* Error codes we've added. */
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312 REG_EEND, /* Premature end. */
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313 REG_ESIZE, /* Compiled pattern bigger than 2^16 bytes. */
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314 REG_ERPAREN /* Unmatched ) or \); not returned from regcomp. */
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315 #ifdef emacs
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316 ,REG_ESYNTAX /* Invalid syntax designator. */
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317 #endif
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318 #ifdef MULE
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319 ,REG_ERANGESPAN /* Ranges may not span charsets. */
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320 ,REG_ECATEGORY /* Invalid category designator */
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321 #endif
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322 } reg_errcode_t;
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323
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324 /* This data structure represents a compiled pattern. Before calling
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325 the pattern compiler, the fields `buffer', `allocated', `fastmap',
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326 `translate', and `no_sub' can be set. After the pattern has been
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327 compiled, the `re_nsub' field is available. All other fields are
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328 private to the regex routines. */
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329
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330 struct re_pattern_buffer
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331 {
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332 /* [[[begin pattern_buffer]]] */
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333 /* Space that holds the compiled pattern. It is declared as
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334 `unsigned char *' because its elements are
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335 sometimes used as array indexes. */
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336 unsigned char *buffer;
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337
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338 /* Number of bytes to which `buffer' points. */
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647
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339 long allocated;
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428
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340
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341 /* Number of bytes actually used in `buffer'. */
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647
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342 long used;
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428
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343
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344 /* Syntax setting with which the pattern was compiled. */
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345 reg_syntax_t syntax;
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346
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347 /* Pointer to a fastmap, if any, otherwise zero. re_search uses
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348 the fastmap, if there is one, to skip over impossible
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349 starting points for matches. */
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350 char *fastmap;
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351
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352 /* Either a translate table to apply to all characters before
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353 comparing them, or zero for no translation. The translation
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354 is applied to a pattern when it is compiled and to a string
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355 when it is matched. */
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446
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356 RE_TRANSLATE_TYPE translate;
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428
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357
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502
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358 /* Number of returnable groups found by the compiler. (This does
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359 not count shy groups.) */
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647
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360 int re_nsub;
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428
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361
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502
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362 /* Total number of groups found by the compiler. (Including
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363 shy ones.) */
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364 int re_ngroups;
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365
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428
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366 /* Zero if this pattern cannot match the empty string, one else.
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367 Well, in truth it's used only in `re_search_2', to see
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368 whether or not we should use the fastmap, so we don't set
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369 this absolutely perfectly; see `re_compile_fastmap' (the
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370 `duplicate' case). */
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647
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371 unsigned int can_be_null : 1;
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428
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372
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|
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373 /* If REGS_UNALLOCATED, allocate space in the `regs' structure
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374 for `max (RE_NREGS, re_nsub + 1)' groups.
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375 If REGS_REALLOCATE, reallocate space if necessary.
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376 If REGS_FIXED, use what's there. */
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377 #define REGS_UNALLOCATED 0
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378 #define REGS_REALLOCATE 1
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|
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379 #define REGS_FIXED 2
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647
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380 unsigned int regs_allocated : 2;
|
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428
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381
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|
|
382 /* Set to zero when `regex_compile' compiles a pattern; set to one
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383 by `re_compile_fastmap' if it updates the fastmap. */
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647
|
384 unsigned int fastmap_accurate : 1;
|
|
428
|
385
|
|
|
386 /* If set, `re_match_2' does not return information about
|
|
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387 subexpressions. */
|
|
647
|
388 unsigned int no_sub : 1;
|
|
428
|
389
|
|
|
390 /* If set, a beginning-of-line anchor doesn't match at the
|
|
|
391 beginning of the string. */
|
|
647
|
392 unsigned int not_bol : 1;
|
|
428
|
393
|
|
|
394 /* Similarly for an end-of-line anchor. */
|
|
647
|
395 unsigned int not_eol : 1;
|
|
428
|
396
|
|
|
397 /* If true, an anchor at a newline matches. */
|
|
647
|
398 unsigned int newline_anchor : 1;
|
|
428
|
399
|
|
647
|
400 unsigned int warned_about_incompatible_back_references : 1;
|
|
502
|
401
|
|
|
402 /* Mapping between back references and groups (may not be
|
|
|
403 equivalent with shy groups). */
|
|
|
404 int *external_to_internal_register;
|
|
|
405
|
|
|
406 int external_to_internal_register_size;
|
|
|
407
|
|
428
|
408 /* [[[end pattern_buffer]]] */
|
|
|
409 };
|
|
|
410
|
|
|
411 typedef struct re_pattern_buffer regex_t;
|
|
|
412
|
|
|
413 /* Type for byte offsets within the string. POSIX mandates this. */
|
|
|
414 typedef int regoff_t;
|
|
|
415
|
|
|
416
|
|
|
417 /* This is the structure we store register match data in. See
|
|
|
418 regex.texinfo for a full description of what registers match. */
|
|
|
419 struct re_registers
|
|
|
420 {
|
|
647
|
421 int num_regs;
|
|
428
|
422 regoff_t *start;
|
|
|
423 regoff_t *end;
|
|
|
424 };
|
|
|
425
|
|
|
426
|
|
|
427 /* If `regs_allocated' is REGS_UNALLOCATED in the pattern buffer,
|
|
|
428 `re_match_2' returns information about at least this many registers
|
|
|
429 the first time a `regs' structure is passed. */
|
|
|
430 #ifndef RE_NREGS
|
|
|
431 #define RE_NREGS 30
|
|
|
432 #endif
|
|
|
433
|
|
|
434
|
|
|
435 /* POSIX specification for registers. Aside from the different names than
|
|
|
436 `re_registers', POSIX uses an array of structures, instead of a
|
|
|
437 structure of arrays. */
|
|
|
438 typedef struct
|
|
|
439 {
|
|
|
440 regoff_t rm_so; /* Byte offset from string's start to substring's start. */
|
|
|
441 regoff_t rm_eo; /* Byte offset from string's start to substring's end. */
|
|
|
442 } regmatch_t;
|
|
|
443
|
|
|
444 /* Declarations for routines. */
|
|
|
445
|
|
|
446 /* Sets the current default syntax to SYNTAX, and return the old syntax.
|
|
|
447 You can also simply assign to the `re_syntax_options' variable. */
|
|
|
448 reg_syntax_t re_set_syntax (reg_syntax_t syntax);
|
|
|
449
|
|
|
450 /* Compile the regular expression PATTERN, with length LENGTH
|
|
|
451 and syntax given by the global `re_syntax_options', into the buffer
|
|
|
452 BUFFER. Return NULL if successful, and an error string if not. */
|
|
442
|
453 const char *re_compile_pattern (const char *pattern, int length,
|
|
428
|
454 struct re_pattern_buffer *buffer);
|
|
|
455
|
|
|
456
|
|
|
457 /* Compile a fastmap for the compiled pattern in BUFFER; used to
|
|
|
458 accelerate searches. Return 0 if successful and -2 if was an
|
|
|
459 internal error. */
|
|
826
|
460 int re_compile_fastmap (struct re_pattern_buffer *buffer
|
|
|
461 RE_LISP_SHORT_CONTEXT_ARGS_DECL);
|
|
428
|
462
|
|
|
463
|
|
|
464 /* Search in the string STRING (with length LENGTH) for the pattern
|
|
|
465 compiled into BUFFER. Start searching at position START, for RANGE
|
|
|
466 characters. Return the starting position of the match, -1 for no
|
|
|
467 match, or -2 for an internal error. Also return register
|
|
|
468 information in REGS (if REGS and BUFFER->no_sub are nonzero). */
|
|
442
|
469 int re_search (struct re_pattern_buffer *buffer, const char *string,
|
|
428
|
470 int length, int start, int range,
|
|
826
|
471 struct re_registers *regs RE_LISP_CONTEXT_ARGS_DECL);
|
|
428
|
472
|
|
|
473
|
|
|
474 /* Like `re_search', but search in the concatenation of STRING1 and
|
|
|
475 STRING2. Also, stop searching at index START + STOP. */
|
|
442
|
476 int re_search_2 (struct re_pattern_buffer *buffer, const char *string1,
|
|
|
477 int length1, const char *string2, int length2, int start,
|
|
826
|
478 int range, struct re_registers *regs, int stop
|
|
|
479 RE_LISP_CONTEXT_ARGS_DECL);
|
|
428
|
480
|
|
826
|
481 #ifndef emacs /* never used by XEmacs */
|
|
428
|
482
|
|
|
483 /* Like `re_search', but return how many characters in STRING the regexp
|
|
|
484 in BUFFER matched, starting at position START. */
|
|
442
|
485 int re_match (struct re_pattern_buffer *buffer, const char *string,
|
|
826
|
486 int length, int start, struct re_registers *regs
|
|
|
487 RE_LISP_CONTEXT_ARGS_DECL);
|
|
428
|
488
|
|
826
|
489 #endif /* not emacs */
|
|
428
|
490
|
|
|
491 /* Relates to `re_match' as `re_search_2' relates to `re_search'. */
|
|
442
|
492 int re_match_2 (struct re_pattern_buffer *buffer, const char *string1,
|
|
|
493 int length1, const char *string2, int length2,
|
|
826
|
494 int start, struct re_registers *regs, int stop
|
|
|
495 RE_LISP_CONTEXT_ARGS_DECL);
|
|
428
|
496
|
|
|
497 /* Set REGS to hold NUM_REGS registers, storing them in STARTS and
|
|
|
498 ENDS. Subsequent matches using BUFFER and REGS will use this memory
|
|
|
499 for recording register information. STARTS and ENDS must be
|
|
|
500 allocated with malloc, and must each be at least `NUM_REGS * sizeof
|
|
|
501 (regoff_t)' bytes long.
|
|
|
502
|
|
|
503 If NUM_REGS == 0, then subsequent matches should allocate their own
|
|
|
504 register data.
|
|
|
505
|
|
|
506 Unless this function is called, the first search or match using
|
|
|
507 PATTERN_BUFFER will allocate its own register data, without
|
|
|
508 freeing the old data. */
|
|
|
509 void re_set_registers (struct re_pattern_buffer *buffer,
|
|
647
|
510 struct re_registers *regs, int num_regs,
|
|
428
|
511 regoff_t *starts, regoff_t *ends);
|
|
|
512
|
|
|
513 #ifdef _REGEX_RE_COMP
|
|
|
514 /* 4.2 bsd compatibility. */
|
|
442
|
515 char *re_comp (const char *);
|
|
|
516 int re_exec (const char *);
|
|
428
|
517 #endif
|
|
|
518
|
|
|
519 /* POSIX compatibility. */
|
|
442
|
520 int regcomp (regex_t *preg, const char *pattern, int cflags);
|
|
|
521 int regexec (const regex_t *preg, const char *string, size_t nmatch,
|
|
428
|
522 regmatch_t pmatch[], int eflags);
|
|
442
|
523 size_t regerror (int errcode, const regex_t *preg, char *errbuf,
|
|
428
|
524 size_t errbuf_size);
|
|
|
525 void regfree (regex_t *preg);
|
|
|
526
|
|
440
|
527 #endif /* INCLUDED_regex_h_ */
|
