2 #define _PG_REGEX_H_ /* never again */
6 * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
8 * Development of this software was funded, in part, by Cray Research Inc.,
9 * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
10 * Corporation, none of whom are responsible for the results. The author
13 * Redistribution and use in source and binary forms -- with or without
14 * modification -- are permitted for any purpose, provided that
15 * redistributions in source form retain this entire copyright notice and
16 * indicate the origin and nature of any modifications.
18 * I'd appreciate being given credit for this package in the documentation
19 * of software which uses it, but that is not a requirement.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
22 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
23 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
24 * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
30 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * src/include/regex/regex.h
36 * This is an implementation of POSIX regex_t, so it clashes with the
37 * system-provided <regex.h> header. That header might be unintentionally
38 * included already, so we force that to happen now on all systems to show that
39 * we can cope and that we completely replace the system regex interfaces.
41 * Note that we avoided using _REGEX_H_ as an include guard, as that confuses
42 * matters on BSD family systems including macOS that use the same include
49/* Avoid redefinition errors due to the system header. */
114 * Add your own defines, if needed, here.
119 * interface types etc.
123 * regoff_t has to be large enough to hold either off_t or ssize_t,
124 * and must be signed; it's only a guess that long is suitable.
129 * other interface types
132/* the biggie, a compiled RE (or rather, a front end to same) */
136 size_t re_nsub;
/* number of subexpressions */
137 long re_info;
/* bitmask of the following flags: */
138 #define REG_UBACKREF 000001 /* has back-reference (\n) */
139 #define REG_ULOOKAROUND 000002 /* has lookahead/lookbehind constraint */
140 #define REG_UBOUNDS 000004 /* has bounded quantifier ({m,n}) */
141 #define REG_UBRACES 000010 /* has { that doesn't begin a quantifier */
142 #define REG_UBSALNUM 000020 /* has backslash-alphanumeric in non-ARE */
143 #define REG_UPBOTCH 000040 /* has unmatched right paren in ERE (legal
144 * per spec, but that was a mistake) */
145 #define REG_UBBS 000100 /* has backslash within bracket expr */
146 #define REG_UNONPOSIX 000200 /* has any construct that extends POSIX */
147 #define REG_UUNSPEC 000400 /* has any case disallowed by POSIX, e.g.
149 #define REG_UUNPORT 001000 /* has numeric character code dependency */
150 #define REG_ULOCALE 002000 /* has locale dependency */
151 #define REG_UEMPTYMATCH 004000 /* can match a zero-length string */
152 #define REG_UIMPOSSIBLE 010000 /* provably cannot match anything */
153 #define REG_USHORTEST 020000 /* has non-greedy quantifier */
154 int re_csize;
/* sizeof(character) */
155 char *re_endp;
/* backward compatibility kludge */
156 Oid re_collation;
/* Collation that defines LC_CTYPE behavior */
157 /* the rest is opaque pointers to hidden innards */
158 char *re_guts;
/* `char *' is more portable than `void *' */
162/* result reporting (may acquire more fields later) */
169/* supplementary control and reporting */
178 * regex compilation flags
180 #define REG_BASIC 000000 /* BREs (convenience) */
181 #define REG_EXTENDED 000001 /* EREs */
182 #define REG_ADVF 000002 /* advanced features in EREs */
183 #define REG_ADVANCED 000003 /* AREs (which are also EREs) */
184 #define REG_QUOTE 000004 /* no special characters, none */
185 #define REG_NOSPEC REG_QUOTE /* historical synonym */
186 #define REG_ICASE 000010 /* ignore case */
187 #define REG_NOSUB 000020 /* caller doesn't need subexpr match data */
188 #define REG_EXPANDED 000040 /* expanded format, white space & comments */
189 #define REG_NLSTOP 000100 /* \n doesn't match . or [^ ] */
190 #define REG_NLANCH 000200 /* ^ matches after \n, $ before */
191 #define REG_NEWLINE 000300 /* newlines are line terminators */
192 #define REG_PEND 000400 /* ugh -- backward-compatibility hack */
193 #define REG_EXPECT 001000 /* report details on partial/limited matches */
194 #define REG_BOSONLY 002000 /* temporary kludge for BOS-only matches */
195 #define REG_DUMP 004000 /* none of your business :-) */
196#define REG_FAKE 010000 /* none of your business :-) */
197#define REG_PROGRESS 020000 /* none of your business :-) */
202 * regex execution flags
204 #define REG_NOTBOL 0001 /* BOS is not BOL */
205 #define REG_NOTEOL 0002 /* EOS is not EOL */
206 #define REG_STARTEND 0004 /* backward compatibility kludge */
207 #define REG_FTRACE 0010 /* none of your business */
208#define REG_MTRACE 0020 /* none of your business */
209#define REG_SMALL 0040 /* none of your business */
214 * Be careful if modifying the list of error codes -- the table used by
215 * regerror() is generated automatically from this file!
217 #define REG_OKAY 0 /* no errors detected */
218 #define REG_NOMATCH 1 /* failed to match */
219 #define REG_BADPAT 2 /* invalid regexp */
220 #define REG_ECOLLATE 3 /* invalid collating element */
221 #define REG_ECTYPE 4 /* invalid character class */
222 #define REG_EESCAPE 5 /* invalid escape \ sequence */
223 #define REG_ESUBREG 6 /* invalid backreference number */
224 #define REG_EBRACK 7 /* brackets [] not balanced */
225 #define REG_EPAREN 8 /* parentheses () not balanced */
226 #define REG_EBRACE 9 /* braces {} not balanced */
227 #define REG_BADBR 10 /* invalid repetition count(s) */
228 #define REG_ERANGE 11 /* invalid character range */
229 #define REG_ESPACE 12 /* out of memory */
230 #define REG_BADRPT 13 /* quantifier operand invalid */
231 #define REG_ASSERT 15 /* "can't happen" -- you found a bug */
232 #define REG_INVARG 16 /* invalid argument to regex function */
233 #define REG_MIXED 17 /* character widths of regex and string differ */
234 #define REG_BADOPT 18 /* invalid embedded option */
235#define REG_ETOOBIG 19 /* regular expression is too complex */
236 #define REG_ECOLORS 20 /* too many colors */
237 /* two specials for debugging and testing */
238#define REG_ATOI 101 /* convert error-code name to number */
239 #define REG_ITOA 102 /* convert error-code number to name */
240 /* non-error result codes for pg_regprefix */
241#define REG_PREFIX (-1) /* identified a common prefix */
242#define REG_EXACT (-2) /* identified an exact match */
245 /* Redirect the standard typenames to our typenames. */
246 #define regoff_t pg_regoff_t
247#define regex_t pg_regex_t
248#define regmatch_t pg_regmatch_t
252 * the prototypes for exported functions
257 int flags,
Oid collation);
260 size_t nmatch,
regmatch_t pmatch[],
int flags);
269 int cflags,
Oid collation,
272#endif /* _PG_REGEX_H_ */
int errcode(int sqlerrcode)
regex_t * RE_compile_and_cache(text *text_re, int cflags, Oid collation)
bool RE_compile_and_execute(text *text_re, char *dat, int dat_len, int cflags, Oid collation, int nmatch, regmatch_t *pmatch)
size_t pg_regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size)
int pg_regprefix(regex_t *re, pg_wchar **string, size_t *slength)
int pg_regcomp(regex_t *re, const pg_wchar *string, size_t len, int flags, Oid collation)
int pg_regexec(regex_t *re, const pg_wchar *string, size_t len, size_t search_start, rm_detail_t *details, size_t nmatch, regmatch_t pmatch[], int flags)
void pg_regfree(regex_t *re)