regex.h Go to the documentation of this file. #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. * * * Prototypes etc. marked with "^" within comments get gathered up (and * possibly edited) by the regfwd program and inserted near the bottom of this * file. * * We offer the option of declaring one wide-character version of the RE * functions as well as the char versions. To do that, define __REG_WIDE_T to * the type of wide characters (unfortunately, there is no consensus that * wchar_t is suitable) and __REG_WIDE_COMPILE and __REG_WIDE_EXEC to the * names to be used for the compile and execute functions (suggestion: * re_Xcomp and re_Xexec, where X is a letter suggestive of the wide type, * e.g. re_ucomp and re_uexec for Unicode). For cranky old compilers, it may * be necessary to do something like: * #define __REG_WIDE_COMPILE(a,b,c,d) re_Xcomp(a,b,c,d) * #define __REG_WIDE_EXEC(a,b,c,d,e,f,g) re_Xexec(a,b,c,d,e,f,g) * rather than just #defining the names as parameterless macros. * * For some specialized purposes, it may be desirable to suppress the * declarations of the "front end" functions, regcomp() and regexec(), or of * the char versions of the compile and execute functions. To suppress the * front-end functions, define __REG_NOFRONT. To suppress the char versions, * define __REG_NOCHAR. * * The right place to do those defines (and some others you may want, see * below) would be <sys/types.h>. If you don't have control of that file, the * right place to add your own defines to this file is marked below. This is * normally done automatically, by the makefile and regmkhdr, based on the * contents of regcustom.h. */ /* * voodoo for C++ */ #ifdef __cplusplus extern "C" { #endif /* * Add your own defines, if needed, here. */ /* * Location where a chunk of regcustom.h is automatically spliced into this * file (working from its prototype, regproto.h). */ /* --- begin --- */ /* ensure certain things don't sneak in from system headers */ #ifdef __REG_WIDE_T #undef __REG_WIDE_T #endif #ifdef __REG_WIDE_COMPILE #undef __REG_WIDE_COMPILE #endif #ifdef __REG_WIDE_EXEC #undef __REG_WIDE_EXEC #endif #ifdef __REG_REGOFF_T #undef __REG_REGOFF_T #endif #ifdef __REG_VOID_T #undef __REG_VOID_T #endif #ifdef __REG_CONST #undef __REG_CONST #endif #ifdef __REG_NOFRONT #undef __REG_NOFRONT #endif #ifdef __REG_NOCHAR #undef __REG_NOCHAR #endif /* interface types */ #define __REG_WIDE_T Tcl_UniChar #define __REG_REGOFF_T long /* not really right, but good enough... */ #define __REG_VOID_T VOID #define __REG_CONST CONST /* names and declarations */ #define __REG_WIDE_COMPILE TclReComp #define __REG_WIDE_EXEC TclReExec #define __REG_NOFRONT /* don't want regcomp() and regexec() */ #define __REG_NOCHAR /* or the char versions */ #define regfree TclReFree #define regerror TclReError /* --- end --- */ /* * 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, so we offer * <sys/types.h> an override. */ #ifdef __REG_REGOFF_T typedef __REG_REGOFF_T regoff_t; #else typedef long regoff_t; #endif /* * For benefit of old compilers, we offer <sys/types.h> the option of * overriding the `void' type used to declare nonexistent return types. */ #ifdef __REG_VOID_T typedef __REG_VOID_T re_void; #else typedef void re_void; #endif /* * Also for benefit of old compilers, <sys/types.h> can supply a macro which * expands to a substitute for `const'. */ #ifndef __REG_CONST #define __REG_CONST const #endif /* * 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; /* information about RE */ #define REG_UBACKREF 000001 #define REG_ULOOKAHEAD 000002 #define REG_UBOUNDS 000004 #define REG_UBRACES 000010 #define REG_UBSALNUM 000020 #define REG_UPBOTCH 000040 #define REG_UBBS 000100 #define REG_UNONPOSIX 000200 #define REG_UUNSPEC 000400 #define REG_UUNPORT 001000 #define REG_ULOCALE 002000 #define REG_UEMPTYMATCH 004000 #define REG_UIMPOSSIBLE 010000 #define REG_USHORTEST 020000 int re_csize; /* sizeof(character) */ char *re_endp; /* backward compatibility kludge */ /* 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; /* * compilation ^ #ifndef __REG_NOCHAR ^ int re_comp(regex_t *, __REG_CONST char *, size_t, int); ^ #endif ^ #ifndef __REG_NOFRONT ^ int regcomp(regex_t *, __REG_CONST char *, int); ^ #endif ^ #ifdef __REG_WIDE_T ^ int __REG_WIDE_COMPILE(regex_t *, __REG_CONST __REG_WIDE_T *, size_t, int); ^ #endif */ #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 :-) */ /* * execution ^ #ifndef __REG_NOCHAR ^ int re_exec(regex_t *, __REG_CONST char *, size_t, ^ rm_detail_t *, size_t, regmatch_t [], int); ^ #endif ^ #ifndef __REG_NOFRONT ^ int regexec(regex_t *, __REG_CONST char *, size_t, regmatch_t [], int); ^ #endif ^ #ifdef __REG_WIDE_T ^ int __REG_WIDE_EXEC(regex_t *, __REG_CONST __REG_WIDE_T *, size_t, ^ rm_detail_t *, size_t, regmatch_t [], int); ^ #endif */ #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 */ /* * misc generics (may be more functions here eventually) ^ re_void regfree(regex_t *); */ /* * error reporting * Be careful if modifying the list of error codes -- the table used by * regerror() is generated automatically from this file! * * Note that there is no wide-char variant of regerror at this time; what kind * of character is used for error reports is independent of what kind is used * in matching. * ^ extern size_t regerror(int, __REG_CONST regex_t *, char *, size_t); */ #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 /* nfa has too many states */ /* 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 */ /* * the prototypes, as possibly munched by regfwd */ /* =====^!^===== begin forwards =====^!^===== */ /* automatically gathered by fwd; do not hand-edit */ /* === regproto.h === */ #ifndef __REG_NOCHAR int re_comp(regex_t *, __REG_CONST char *, size_t, int); #endif #ifndef __REG_NOFRONT int regcomp(regex_t *, __REG_CONST char *, int); #endif #ifdef __REG_WIDE_T MODULE_SCOPE int __REG_WIDE_COMPILE(regex_t *, __REG_CONST __REG_WIDE_T *, size_t, int); #endif #ifndef __REG_NOCHAR int re_exec(regex_t *, __REG_CONST char *, size_t, rm_detail_t *, size_t, regmatch_t [], int); #endif #ifndef __REG_NOFRONT int regexec(regex_t *, __REG_CONST char *, size_t, regmatch_t [], int); #endif #ifdef __REG_WIDE_T MODULE_SCOPE int __REG_WIDE_EXEC(regex_t *, __REG_CONST __REG_WIDE_T *, size_t, rm_detail_t *, size_t, regmatch_t [], int); #endif MODULE_SCOPE re_void regfree(regex_t *); MODULE_SCOPE size_t regerror(int, __REG_CONST regex_t *, char *, size_t); /* automatically gathered by fwd; do not hand-edit */ /* =====^!^===== end forwards =====^!^===== */ /* * more C++ voodoo */ #ifdef __cplusplus } #endif #endif

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