diff options
Diffstat (limited to 'lib/libcompat/4.3/re_comp.c')
-rw-r--r-- | lib/libcompat/4.3/re_comp.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/lib/libcompat/4.3/re_comp.c b/lib/libcompat/4.3/re_comp.c new file mode 100644 index 0000000..dbe57b1 --- /dev/null +++ b/lib/libcompat/4.3/re_comp.c @@ -0,0 +1,92 @@ +/*- + * Copyright (c) 1992 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * James da Silva at the University of Maryland at College Park. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * Compatibility routines that implement the old re_comp/re_exec interface in + * terms of the regcomp/regexec interface. It's possible that some programs + * rely on dark corners of re_comp/re_exec and won't work with this version, + * but most programs should be fine. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)regex.c 5.1 (Berkeley) 3/29/92"; +#endif /* LIBC_SCCS and not lint */ + +#include <regex.h> +#include <stddef.h> +#include <unistd.h> + +static regex_t re_regexp; +static int re_gotexp; +static char re_errstr[100]; + +char * +re_comp(const char *s) +{ + int rc; + + if (s == NULL || *s == '\0') { + if (!re_gotexp) + return __DECONST(char *, + "no previous regular expression"); + return (NULL); + } + + if (re_gotexp) { + regfree(&re_regexp); + re_gotexp = 0; + } + + rc = regcomp(&re_regexp, s, REG_EXTENDED); + if (rc == 0) { + re_gotexp = 1; + return (NULL); + } + + regerror(rc, &re_regexp, re_errstr, sizeof(re_errstr)); + re_errstr[sizeof(re_errstr) - 1] = '\0'; + return (re_errstr); +} + +int +re_exec(const char *s) +{ + int rc; + + if (!re_gotexp) + return (-1); + rc = regexec(&re_regexp, s, 0, NULL, 0); + return (rc == 0 ? 1 : 0); +} |