#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_ */