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Diffstat (limited to 'src/include/regex/regex.h')
| -rw-r--r-- | src/include/regex/regex.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/include/regex/regex.h b/src/include/regex/regex.h new file mode 100644 index 0000000..2b48a19 --- /dev/null +++ b/src/include/regex/regex.h @@ -0,0 +1,186 @@ +#ifndef _REGEX_H_ +#define _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 + */ + +/* + * 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 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; +} regex_t; + +/* result reporting (may acquire more fields later) */ +typedef struct +{ + regoff_t rm_so; /* start of substring */ + regoff_t rm_eo; /* end of substring */ +} regmatch_t; + +/* supplementary control and reporting */ +typedef struct +{ + 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 /* don't care about subexpressions */ +#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 */ +#define REG_CANCEL 21 /* operation cancelled */ +/* 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 */ + + + +/* + * the prototypes for exported functions + */ + +/* regcomp.c */ +extern int pg_regcomp(regex_t *, const pg_wchar *, size_t, int, Oid); +extern int pg_regexec(regex_t *, const pg_wchar *, size_t, size_t, rm_detail_t *, size_t, regmatch_t[], int); +extern int pg_regprefix(regex_t *, pg_wchar **, size_t *); +extern void pg_regfree(regex_t *); +extern size_t pg_regerror(int, const regex_t *, char *, size_t); + +/* 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 /* _REGEX_H_ */ |