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+/*
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+ approximate_regex - just an execution wrapper of libtre for
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+ fixok.ut.emphi.ru
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+
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+ Copyright (C) 2016 Dmitry Yu Okunev <dyokunev@ut.mephi.ru> 0x8E30679C
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+
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+ This program is free software: you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation, either version 3 of the License, or
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+ (at your option) any later version.
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+
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+ This program 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
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#include <tre/regex.h>
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+#include <stdio.h>
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+#include <string.h>
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+#include <errno.h>
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+
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+
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+int main ( int argc, char *argv[] )
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+{
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+ if ( argc != 3 ) {
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+ fprintf ( stderr, "syntax: %s key_list_file key\n", argv[0] );
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+ return EINVAL;
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+ }
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+
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+ const char *const key_list_path = argv[1];
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+ const char *const key = argv[2];
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+ FILE *key_list_file = fopen ( key_list_path, "r" );
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+
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+ if ( key_list_file == NULL ) {
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+ fprintf ( stderr, "Cannot open file \"%s\" for reading: %s\n", key_list_path, strerror ( errno ) );
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+ return errno;
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+ }
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+
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+ regex_t reg;
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+ int rc = tre_regcomp ( ®, key, REG_LITERAL );
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+
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+ if ( rc != 0 ) {
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+ fprintf ( stderr, "regcomp() error: %i\n", rc );
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+ return EINVAL;
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+ }
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+
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+ regamatch_t match;
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+ match.nmatch = 0;
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+ match.pmatch = NULL;
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+ regaparams_t params;
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+ params.cost_ins = 1;
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+ params.cost_del = 1;
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+ params.cost_subst = 1;
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+ params.max_cost = 4;
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+ params.max_ins = 4;
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+ params.max_del = 4;
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+ params.max_subst = 4;
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+ params.max_err = 4;
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+ char *line = NULL;
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+ size_t size = 0;
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+
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+ while ( getline ( &line, &size, key_list_file ) > 0 ) {
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+ switch ( tre_regaexec ( ®, line, &match, params, 0 ) ) {
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+ case REG_NOMATCH:
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+ break;
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+
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+ case 0: // found
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+ printf ( "%s", line );
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+ return 0;
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+
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+ case REG_ESPACE:
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+ fprintf ( stderr, "Cannot allocate memory\n" );
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+ return ENOMEM;
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+ }
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+ }
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+
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+ return 1;
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+}
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+
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