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2ec11c2b6e
<regexp.h> (not to be confused with <regex.h>) is an obsolete and frankly horrible regular expression-matching API. It was part of SVID but was withdrawn in Issue 5 (for reference, we're on Issue 7 now). It doesn't do anything you can't do with <regex.h>, and using it involves defining a bunch of macros before including the header. Moreover, the code in regexp.h that uses those macros has been buggy since its creation (in 1996) and no one has noticed, which indicates to me that there are no users. (Specifically, RETURN() is used in a whole bunch of cases where it should have been ERROR().) The header is given a warning and marked deprecated for 2.22. See: https://sourceware.org/ml/libc-alpha/2015-07/msg00862.html and https://sourceware.org/ml/libc-alpha/2015-07/msg00871.html.
78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/* Define function and variables for the obsolete <regexp.h> interface.
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Copyright (C) 1996-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* We don't include regexp.h here because of the macros it requires, and
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because it now contains an unconditional #warning. */
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#include <regex.h>
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/* Define the variables used for the interface. */
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char *loc1;
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char *loc2;
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/* Although we do not support the use we define this variable as well. */
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char *locs;
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/* Find the next match in STRING. The compiled regular expression is
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found in the buffer starting at EXPBUF. `loc1' will return the
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first character matched and `loc2' points to the next unmatched
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character. */
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int
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__step (const char *string, const char *expbuf)
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{
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regmatch_t match; /* We only need info about the full match. */
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expbuf += __alignof (regex_t *);
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expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);
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if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)
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== REG_NOMATCH)
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return 0;
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loc1 = (char *) string + match.rm_so;
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loc2 = (char *) string + match.rm_eo;
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return 1;
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}
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weak_alias (__step, step)
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/* Match the beginning of STRING with the compiled regular expression
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in EXPBUF. If the match is successful `loc2' will contain the
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position of the first unmatched character. */
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int
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__advance (const char *string, const char *expbuf)
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{
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regmatch_t match; /* We only need info about the full match. */
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expbuf += __alignof__ (regex_t *);
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expbuf -= (expbuf - ((const char *) 0)) % __alignof__ (regex_t *);
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if (__regexec ((const regex_t *) expbuf, string, 1, &match, REG_NOTEOL)
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== REG_NOMATCH
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/* We have to check whether the check is at the beginning of the
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buffer. */
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|| match.rm_so != 0)
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return 0;
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loc2 = (char *) string + match.rm_eo;
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return 1;
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}
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weak_alias (__advance, advance)
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