130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
/* $NetBSD: type_regex.c,v 1.7 2004/11/24 11:57:09 blymn Exp $ */
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/*-
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* Copyright (c) 1998-1999 Brett Lymn
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* (blymn@baea.com.au, brett_lymn@yahoo.com.au)
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* All rights reserved.
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*
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* This code has been donated to The NetBSD Foundation by the Author.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: type_regex.c,v 1.7 2004/11/24 11:57:09 blymn Exp $");
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#include <stdlib.h>
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#include <sys/types.h>
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#include <regex.h>
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#include "form.h"
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#include "internals.h"
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/*
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* The regex type handling.
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*/
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typedef struct
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{
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regex_t compiled;
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unsigned references;
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} regex_args;
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/*
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* Create the regex arguments structure from the given args. Return NULL
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* if the call fails, otherwise return a pointer to the structure allocated.
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*/
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static char *
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create_regex_args(va_list *args)
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{
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regex_args *new;
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char *expression;
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new = (regex_args *) malloc(sizeof(regex_args));
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if (new != NULL) {
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new->references = 1;
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expression = va_arg(*args, char *);
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if ((regcomp(&new->compiled, expression,
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(REG_EXTENDED | REG_NOSUB | REG_NEWLINE))) != 0) {
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free(new);
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return NULL;
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}
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}
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return (void *) new;
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}
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/*
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* Copy the regex argument structure.
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*/
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static char *
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copy_regex_args(char *args)
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{
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((regex_args *) (void *) args)->references++;
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return (void *) args;
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}
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/*
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* Free the allocated storage associated with the type arguments.
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*/
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static void
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free_regex_args(char *args)
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{
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if (args != NULL) {
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((regex_args *) (void *) args)->references--;
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if (((regex_args *) (void *) args)->references == 0)
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free(args);
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}
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}
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/*
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* Check the contents of the field buffer match the regex.
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*/
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static int
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regex_check_field(FIELD *field, char *args)
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{
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if ((args != NULL) &&
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(regexec(&((regex_args *) (void *) field->args)->compiled,
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args, (size_t) 0, NULL, 0) == 0))
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return TRUE;
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return FALSE;
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}
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static FIELDTYPE builtin_regex = {
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_TYPE_HAS_ARGS | _TYPE_IS_BUILTIN, /* flags */
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0, /* refcount */
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NULL, /* link */
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create_regex_args, /* make_args */
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copy_regex_args, /* copy_args */
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free_regex_args, /* free_args */
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regex_check_field, /* field_check */
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NULL, /* char_check */
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NULL, /* next_choice */
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NULL /* prev_choice */
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};
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FIELDTYPE *TYPE_REGEXP = &builtin_regex;
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