diff options
Diffstat (limited to 'regex.c')
| -rw-r--r-- | regex.c | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/regex.c b/regex.c deleted file mode 100644 index e12cf65..0000000 --- a/regex.c +++ /dev/null @@ -1,172 +0,0 @@ -/** regex - regular expression functions related to POSIX regex lib. */ - -/* This file is part of flex. */ - -/* 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. */ - -/* 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR */ -/* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */ -/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */ -/* PURPOSE. */ - -#include "flexdef.h" - - -static const char* REGEXP_LINEDIR = "^#line ([[:digit:]]+) \"(.*)\""; -static const char* REGEXP_BLANK_LINE = "^[[:space:]]*$"; - -regex_t regex_linedir; /**< matches line directives */ -regex_t regex_blank_line; /**< matches blank lines */ - - -/** Initialize the regular expressions. - * @return true upon success. - */ -bool flex_init_regex(void) -{ - flex_regcomp(®ex_linedir, REGEXP_LINEDIR, REG_EXTENDED); - flex_regcomp(®ex_blank_line, REGEXP_BLANK_LINE, REG_EXTENDED); - - return true; -} - -/** Compiles a regular expression or dies trying. - * @param preg Same as for regcomp(). - * @param regex Same as for regcomp(). - * @param cflags Same as for regcomp(). - */ -void flex_regcomp(regex_t *preg, const char *regex, int cflags) -{ - int err; - - memset (preg, 0, sizeof (regex_t)); - - if ((err = regcomp (preg, regex, cflags)) != 0) { - const int errbuf_sz = 200; - char *errbuf, *rxerr; - - errbuf = (char*)flex_alloc(errbuf_sz *sizeof(char)); - if (!errbuf) - flexfatal(_("Unable to allocate buffer to report regcomp")); - rxerr = (char*)flex_alloc(errbuf_sz *sizeof(char)); - if (!rxerr) - flexfatal(_("Unable to allocate buffer for regerror")); - regerror (err, preg, rxerr, errbuf_sz); - snprintf (errbuf, errbuf_sz, "regcomp for \"%s\" failed: %s", regex, rxerr); - - flexfatal (errbuf); - free(errbuf); - free(rxerr); - } -} - -/** Extract a copy of the match, or NULL if no match. - * @param m A match as returned by regexec(). - * @param src The source string that was passed to regexec(). - * @return The allocated string. - */ -char *regmatch_dup (regmatch_t * m, const char *src) -{ - char *str; - int len; - - if (m == NULL || m->rm_so < 0) - return NULL; - len = m->rm_eo - m->rm_so; - str = (char *) flex_alloc ((len + 1) * sizeof (char)); - if (!str) - flexfatal(_("Unable to allocate a copy of the match")); - strncpy (str, src + m->rm_so, len); - str[len] = 0; - return str; -} - -/** Copy the match. - * @param m A match as returned by regexec(). - * @param dest The destination buffer. - * @param src The source string that was passed to regexec(). - * @return dest - */ -char *regmatch_cpy (regmatch_t * m, char *dest, const char *src) -{ - if (m == NULL || m->rm_so < 0) { - if (dest) - dest[0] = '\0'; - return dest; - } - - snprintf (dest, regmatch_len(m), "%s", src + m->rm_so); - return dest; -} - -/** Get the length in characters of the match. - * @param m A match as returned by regexec(). - * @param src The source string that was passed to regexec(). - * @return The length of the match. - */ -int regmatch_len (regmatch_t * m) -{ - if (m == NULL || m->rm_so < 0) { - return 0; - } - - return m->rm_eo - m->rm_so; -} - - - -/** Convert a regmatch_t object to an integer using the strtol() function. - * @param m A match as returned by regexec(). - * @param src The source string that was passed to regexec(). - * @param endptr Same as the second argument to strtol(). - * @param base Same as the third argument to strtol(). - * @return The converted integer or error (Return value is the same as for strtol()). - */ -int regmatch_strtol (regmatch_t * m, const char *src, char **endptr, - int base) -{ - int n = 0; - -#define bufsz 20 - char buf[bufsz]; - char *s; - - if (m == NULL || m->rm_so < 0) - return 0; - - if (regmatch_len (m) < bufsz) - s = regmatch_cpy (m, buf, src); - else - s = regmatch_dup (m, src); - - n = strtol (s, endptr, base); - - if (s != buf) - free (s); - - return n; -} - -/** Check for empty or non-existent match. - * @param m A match as returned by regexec(). - * @return false if match length is non-zero. - * Note that reg_empty returns true even if match did not occur at all. - */ -bool regmatch_empty (regmatch_t * m) -{ - return (m == NULL || m->rm_so < 0 || m->rm_so == m->rm_eo); -} - -/* vim:set expandtab cindent tabstop=4 softtabstop=4 shiftwidth=4 textwidth=0: */ |