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/* Shared utility routines for GDB to interact with agent.
Copyright (C) 2009-2015 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "common-defs.h"
#include "gdb_regex.h"
/* A cleanup function that calls regfree. */
static void
do_regfree_cleanup (void *r)
{
regfree (r);
}
/* Create a new cleanup that frees the compiled regular expression R. */
struct cleanup *
make_regfree_cleanup (regex_t *r)
{
return make_cleanup (do_regfree_cleanup, r);
}
/* Return an xmalloc'd error message resulting from a regular
expression compilation failure. */
char *
get_regcomp_error (int code, regex_t *rx)
{
size_t length = regerror (code, rx, NULL, 0);
char *result = xmalloc (length);
regerror (code, rx, result, length);
return result;
}
/* Compile a regexp and throw an exception on error. This returns a
cleanup to free the resulting pattern on success. RX must not be
NULL. */
struct cleanup *
compile_rx_or_error (regex_t *pattern, const char *rx, const char *message)
{
int code;
gdb_assert (rx != NULL);
code = regcomp (pattern, rx, REG_NOSUB);
if (code != 0)
{
char *err = get_regcomp_error (code, pattern);
make_cleanup (xfree, err);
error (("%s: %s"), message, err);
}
return make_regfree_cleanup (pattern);
}
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