Edit
IABSD.fr/src/lib/libform/fty_regex.c
krw
- lib/libform/fty_regex.c
-
/* $OpenBSD: fty_regex.c,v 1.9 2015/01/23 22:48:51 krw Exp $ */ /**************************************************************************** * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ****************************************************************************/ /*************************************************************************** * * * Author : Juergen Pfeifer * * * ***************************************************************************/ #include "form.priv.h" MODULE_ID("$Id: fty_regex.c,v 1.9 2015/01/23 22:48:51 krw Exp $") #if HAVE_REGEX_H_FUNCS /* We prefer POSIX regex */ #include <regex.h> typedef struct { regex_t *pRegExp; unsigned long *refCount; } RegExp_Arg; #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS #undef RETURN static int reg_errno; static char * RegEx_Init(char *instring) { reg_errno = 0; return instring; } static char * RegEx_Error(int code) { reg_errno = code; return 0; } #define INIT register char *sp = RegEx_Init(instring); #define GETC() (*sp++) #define PEEKC() (*sp) #define UNGETC(c) (--sp) #define RETURN(c) return(c) #define ERROR(c) return RegEx_Error(c) #if HAVE_REGEXP_H_FUNCS #include <regexp.h> #else #include <regexpr.h> #endif typedef struct { char *compiled_expression; unsigned long *refCount; } RegExp_Arg; /* Maximum Length we allow for a compiled regular expression */ #define MAX_RX_LEN (2048) #define RX_INCREMENT (256) #endif /*--------------------------------------------------------------------------- | Facility : libnform | Function : static void *Make_RegularExpression_Type(va_list * ap) | | Description : Allocate structure for regex type argument. | | Return Values : Pointer to argument structure or NULL on error +--------------------------------------------------------------------------*/ static void * Make_RegularExpression_Type(va_list *ap) { #if HAVE_REGEX_H_FUNCS char *rx = va_arg(*ap, char *); RegExp_Arg *preg; preg = typeMalloc(RegExp_Arg, 1); if (preg) { T((T_CREATE("RegExp_Arg %p"), preg)); if (((preg->pRegExp = typeMalloc(regex_t, 1)) != 0) && !regcomp(preg->pRegExp, rx, (REG_EXTENDED | REG_NOSUB | REG_NEWLINE))) { T((T_CREATE("regex_t %p"), preg->pRegExp)); preg->refCount = typeMalloc(unsigned long, 1); *(preg->refCount) = 1; } else { if (preg->pRegExp) free(preg->pRegExp); free(preg); preg = (RegExp_Arg *)0; } } return ((void *)preg); #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS char *rx = va_arg(*ap, char *); RegExp_Arg *pArg; pArg = typeMalloc(RegExp_Arg, 1); if (pArg) { int blen = RX_INCREMENT; T((T_CREATE("RegExp_Arg %p"), pArg)); pArg->compiled_expression = NULL; pArg->refCount = typeMalloc(unsigned long, 1); *(pArg->refCount) = 1; do { char *buf = typeMalloc(char, blen); if (buf) { #if HAVE_REGEXP_H_FUNCS char *last_pos = compile(rx, buf, &buf[blen], '\0'); #else /* HAVE_REGEXPR_H_FUNCS */ char *last_pos = compile(rx, buf, &buf[blen]); #endif if (reg_errno) { free(buf); if (reg_errno == 50) blen += RX_INCREMENT; else { free(pArg); pArg = NULL; break; } } else { pArg->compiled_expression = buf; break; } } } while (blen <= MAX_RX_LEN); } if (pArg && !pArg->compiled_expression) { free(pArg); pArg = NULL; } return (void *)pArg; #else return 0; #endif } /*--------------------------------------------------------------------------- | Facility : libnform | Function : static void *Copy_RegularExpression_Type( | const void * argp) | | Description : Copy structure for regex type argument. | | Return Values : Pointer to argument structure or NULL on error. +--------------------------------------------------------------------------*/ static void * Copy_RegularExpression_Type(const void *argp) { #if (HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS) const RegExp_Arg *ap = (const RegExp_Arg *)argp; const RegExp_Arg *result = (const RegExp_Arg *)0; if (ap) { *(ap->refCount) += 1; result = ap; } return (void *)result; #else return 0; #endif } /*--------------------------------------------------------------------------- | Facility : libnform | Function : static void Free_RegularExpression_Type(void * argp) | | Description : Free structure for regex type argument. | | Return Values : - +--------------------------------------------------------------------------*/ static void Free_RegularExpression_Type(void *argp) { #if HAVE_REGEX_H_FUNCS | HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS RegExp_Arg *ap = (RegExp_Arg *)argp; if (ap) { if (--(*(ap->refCount)) == 0) { #if HAVE_REGEX_H_FUNCS if (ap->pRegExp) { free(ap->refCount); regfree(ap->pRegExp); } #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS if (ap->compiled_expression) { free(ap->refCount); free(ap->compiled_expression); } #endif free(ap); } } #endif } /*--------------------------------------------------------------------------- | Facility : libnform | Function : static bool Check_RegularExpression_Field( | FIELD * field, | const void * argp) | | Description : Validate buffer content to be a valid regular expression | | Return Values : TRUE - field is valid | FALSE - field is invalid +--------------------------------------------------------------------------*/ static bool Check_RegularExpression_Field(FIELD *field, const void *argp) { bool match = FALSE; #if HAVE_REGEX_H_FUNCS const RegExp_Arg *ap = (const RegExp_Arg *)argp; if (ap && ap->pRegExp) match = (regexec(ap->pRegExp, field_buffer(field, 0), 0, NULL, 0) ? FALSE : TRUE); #elif HAVE_REGEXP_H_FUNCS | HAVE_REGEXPR_H_FUNCS RegExp_Arg *ap = (RegExp_Arg *)argp; if (ap && ap->compiled_expression) match = (step(field_buffer(field, 0), ap->compiled_expression) ? TRUE : FALSE); #endif return match; } static FIELDTYPE typeREGEXP = { _HAS_ARGS | _RESIDENT, 1, /* this is mutable, so we can't be const */ (FIELDTYPE *)0, (FIELDTYPE *)0, Make_RegularExpression_Type, Copy_RegularExpression_Type, Free_RegularExpression_Type, Check_RegularExpression_Field, NULL, NULL, NULL }; NCURSES_EXPORT_VAR(FIELDTYPE*) TYPE_REGEXP = &typeREGEXP; /* fty_regex.c ends here */