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src/include/regex/regex.h
272 строки
9 KB
Thomas Munro
Cope with <regex.h> name clashes.
06 июл 2024, 01:27
06 июл 2024, 01:27
2a5ef09
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#ifndef _PG_REGEX_H_ #define _PG_REGEX_H_ /* never again */ /* * regular expressions * * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved. * * Development of this software was funded, in part, by Cray Research Inc., * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics * Corporation, none of whom are responsible for the results. The author * thanks all of them. * * Redistribution and use in source and binary forms -- with or without * modification -- are permitted for any purpose, provided that * redistributions in source form retain this entire copyright notice and * indicate the origin and nature of any modifications. * * I'd appreciate being given credit for this package in the documentation * of software which uses it, but that is not a requirement. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * HENRY SPENCER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * src/include/regex/regex.h */ /* * This is an implementation of POSIX regex_t, so it clashes with the * system-provided <regex.h> header. That header might be unintentionally * included already, so we force that to happen now on all systems to show that * we can cope and that we completely replace the system regex interfaces. * * Note that we avoided using _REGEX_H_ as an include guard, as that confuses * matters on BSD family systems including macOS that use the same include * guard. */ #ifndef _WIN32 #include <regex.h> #endif /* Avoid redefinition errors due to the system header. */ #undef REG_UBACKREF #undef REG_ULOOKAROUND #undef REG_UBOUNDS #undef REG_UBRACES #undef REG_UBSALNUM #undef REG_UPBOTCH #undef REG_UBBS #undef REG_UNONPOSIX #undef REG_UUNSPEC #undef REG_UUNPORT #undef REG_ULOCALE #undef REG_UEMPTYMATCH #undef REG_UIMPOSSIBLE #undef REG_USHORTEST #undef REG_BASIC #undef REG_EXTENDED #undef REG_ADVF #undef REG_ADVANCED #undef REG_QUOTE #undef REG_NOSPEC #undef REG_ICASE #undef REG_NOSUB #undef REG_EXPANDED #undef REG_NLSTOP #undef REG_NLANCH #undef REG_NEWLINE #undef REG_PEND #undef REG_EXPECT #undef REG_BOSONLY #undef REG_DUMP #undef REG_FAKE #undef REG_PROGRESS #undef REG_NOTBOL #undef REG_NOTEOL #undef REG_STARTEND #undef REG_FTRACE #undef REG_MTRACE #undef REG_SMALL #undef REG_OKAY #undef REG_NOMATCH #undef REG_BADPAT #undef REG_ECOLLATE #undef REG_ECTYPE #undef REG_EESCAPE #undef REG_ESUBREG #undef REG_EBRACK #undef REG_EPAREN #undef REG_EBRACE #undef REG_BADBR #undef REG_ERANGE #undef REG_ESPACE #undef REG_BADRPT #undef REG_ASSERT #undef REG_INVARG #undef REG_MIXED #undef REG_BADOPT #undef REG_ETOOBIG #undef REG_ECOLORS #undef REG_ATOI #undef REG_ITOA #undef REG_PREFIX #undef REG_EXACT /* * Add your own defines, if needed, here. */ #include "mb/pg_wchar.h" /* * interface types etc. */ /* * regoff_t has to be large enough to hold either off_t or ssize_t, * and must be signed; it's only a guess that long is suitable. */ typedef long pg_regoff_t; /* * other interface types */ /* the biggie, a compiled RE (or rather, a front end to same) */ typedef struct { int re_magic; /* magic number */ size_t re_nsub; /* number of subexpressions */ long re_info; /* bitmask of the following flags: */ #define REG_UBACKREF 000001 /* has back-reference (\n) */ #define REG_ULOOKAROUND 000002 /* has lookahead/lookbehind constraint */ #define REG_UBOUNDS 000004 /* has bounded quantifier ({m,n}) */ #define REG_UBRACES 000010 /* has { that doesn't begin a quantifier */ #define REG_UBSALNUM 000020 /* has backslash-alphanumeric in non-ARE */ #define REG_UPBOTCH 000040 /* has unmatched right paren in ERE (legal * per spec, but that was a mistake) */ #define REG_UBBS 000100 /* has backslash within bracket expr */ #define REG_UNONPOSIX 000200 /* has any construct that extends POSIX */ #define REG_UUNSPEC 000400 /* has any case disallowed by POSIX, e.g. * an empty branch */ #define REG_UUNPORT 001000 /* has numeric character code dependency */ #define REG_ULOCALE 002000 /* has locale dependency */ #define REG_UEMPTYMATCH 004000 /* can match a zero-length string */ #define REG_UIMPOSSIBLE 010000 /* provably cannot match anything */ #define REG_USHORTEST 020000 /* has non-greedy quantifier */ int re_csize; /* sizeof(character) */ char *re_endp; /* backward compatibility kludge */ Oid re_collation; /* Collation that defines LC_CTYPE behavior */ /* the rest is opaque pointers to hidden innards */ char *re_guts; /* `char *' is more portable than `void *' */ char *re_fns; } pg_regex_t; /* result reporting (may acquire more fields later) */ typedef struct { pg_regoff_t rm_so; /* start of substring */ pg_regoff_t rm_eo; /* end of substring */ } pg_regmatch_t; /* supplementary control and reporting */ typedef struct { pg_regmatch_t rm_extend; /* see REG_EXPECT */ } rm_detail_t; /* * regex compilation flags */ #define REG_BASIC 000000 /* BREs (convenience) */ #define REG_EXTENDED 000001 /* EREs */ #define REG_ADVF 000002 /* advanced features in EREs */ #define REG_ADVANCED 000003 /* AREs (which are also EREs) */ #define REG_QUOTE 000004 /* no special characters, none */ #define REG_NOSPEC REG_QUOTE /* historical synonym */ #define REG_ICASE 000010 /* ignore case */ #define REG_NOSUB 000020 /* caller doesn't need subexpr match data */ #define REG_EXPANDED 000040 /* expanded format, white space & comments */ #define REG_NLSTOP 000100 /* \n doesn't match . or [^ ] */ #define REG_NLANCH 000200 /* ^ matches after \n, $ before */ #define REG_NEWLINE 000300 /* newlines are line terminators */ #define REG_PEND 000400 /* ugh -- backward-compatibility hack */ #define REG_EXPECT 001000 /* report details on partial/limited matches */ #define REG_BOSONLY 002000 /* temporary kludge for BOS-only matches */ #define REG_DUMP 004000 /* none of your business :-) */ #define REG_FAKE 010000 /* none of your business :-) */ #define REG_PROGRESS 020000 /* none of your business :-) */ /* * regex execution flags */ #define REG_NOTBOL 0001 /* BOS is not BOL */ #define REG_NOTEOL 0002 /* EOS is not EOL */ #define REG_STARTEND 0004 /* backward compatibility kludge */ #define REG_FTRACE 0010 /* none of your business */ #define REG_MTRACE 0020 /* none of your business */ #define REG_SMALL 0040 /* none of your business */ /* * error reporting * Be careful if modifying the list of error codes -- the table used by * regerror() is generated automatically from this file! */ #define REG_OKAY 0 /* no errors detected */ #define REG_NOMATCH 1 /* failed to match */ #define REG_BADPAT 2 /* invalid regexp */ #define REG_ECOLLATE 3 /* invalid collating element */ #define REG_ECTYPE 4 /* invalid character class */ #define REG_EESCAPE 5 /* invalid escape \ sequence */ #define REG_ESUBREG 6 /* invalid backreference number */ #define REG_EBRACK 7 /* brackets [] not balanced */ #define REG_EPAREN 8 /* parentheses () not balanced */ #define REG_EBRACE 9 /* braces {} not balanced */ #define REG_BADBR 10 /* invalid repetition count(s) */ #define REG_ERANGE 11 /* invalid character range */ #define REG_ESPACE 12 /* out of memory */ #define REG_BADRPT 13 /* quantifier operand invalid */ #define REG_ASSERT 15 /* "can't happen" -- you found a bug */ #define REG_INVARG 16 /* invalid argument to regex function */ #define REG_MIXED 17 /* character widths of regex and string differ */ #define REG_BADOPT 18 /* invalid embedded option */ #define REG_ETOOBIG 19 /* regular expression is too complex */ #define REG_ECOLORS 20 /* too many colors */ /* two specials for debugging and testing */ #define REG_ATOI 101 /* convert error-code name to number */ #define REG_ITOA 102 /* convert error-code number to name */ /* non-error result codes for pg_regprefix */ #define REG_PREFIX (-1) /* identified a common prefix */ #define REG_EXACT (-2) /* identified an exact match */ /* Redirect the standard typenames to our typenames. */ #define regoff_t pg_regoff_t #define regex_t pg_regex_t #define regmatch_t pg_regmatch_t /* * the prototypes for exported functions */ /* regcomp.c */ extern int pg_regcomp(regex_t *re, const pg_wchar *string, size_t len, int flags, Oid collation); extern 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); extern int pg_regprefix(regex_t *re, pg_wchar **string, size_t *slength); extern void pg_regfree(regex_t *re); extern size_t pg_regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size); /* regexp.c */ extern regex_t *RE_compile_and_cache(text *text_re, int cflags, Oid collation); extern bool RE_compile_and_execute(text *text_re, char *dat, int dat_len, int cflags, Oid collation, int nmatch, regmatch_t *pmatch); #endif /* _PG_REGEX_H_ */