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authorTavian Barnes <tavianator@tavianator.com>2022-02-04 11:23:27 -0500
committerTavian Barnes <tavianator@tavianator.com>2022-02-04 11:28:22 -0500
commit2d4d6787c4bc62042be4a58a4791074ab2c6a89e (patch)
tree0753c783533afc2bc3362f73ba3e8c2e45f1e65b /regex.c
parentd83ffb41c7f5d42bfb43a19e38ab3d1331f0d86e (diff)
downloadbfs-2d4d6787c4bc62042be4a58a4791074ab2c6a89e.tar.xz
regex: Add support for emacs and grep types
Diffstat (limited to 'regex.c')
-rw-r--r--regex.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/regex.c b/regex.c
new file mode 100644
index 0000000..f8bd833
--- /dev/null
+++ b/regex.c
@@ -0,0 +1,62 @@
+/****************************************************************************
+ * bfs *
+ * Copyright (C) 2022 Tavian Barnes <tavianator@tavianator.com> *
+ * *
+ * Permission to use, copy, modify, and/or distribute this software for any *
+ * purpose with or without fee is hereby granted. *
+ * *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF *
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR *
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES *
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN *
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF *
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. *
+ ****************************************************************************/
+
+#include "regex.h"
+#include <stdlib.h>
+
+int bfs_regcomp(regex_t *preg, const char *regex, int cflags, enum bfs_regex_type type) {
+#if BFS_WITH_ONIGURUMA
+ // Oniguruma's POSIX wrapper uses the selected default syntax when REG_EXTENDED is set
+ cflags |= REG_EXTENDED;
+
+ switch (type) {
+ case BFS_REGEX_POSIX_BASIC:
+ onig_set_default_syntax(ONIG_SYNTAX_POSIX_BASIC);
+ break;
+ case BFS_REGEX_POSIX_EXTENDED:
+ onig_set_default_syntax(ONIG_SYNTAX_POSIX_EXTENDED);
+ break;
+ case BFS_REGEX_EMACS:
+ onig_set_default_syntax(ONIG_SYNTAX_EMACS);
+ break;
+ case BFS_REGEX_GREP:
+ onig_set_default_syntax(ONIG_SYNTAX_GREP);
+ break;
+ }
+#else
+ switch (type) {
+ case BFS_REGEX_POSIX_BASIC:
+ cflags &= ~REG_EXTENDED;
+ break;
+ case BFS_REGEX_POSIX_EXTENDED:
+ cflags |= REG_EXTENDED;
+ break;
+ default:
+ return REG_BADPAT;
+ }
+#endif
+
+ return regcomp(preg, regex, cflags);
+}
+
+char *bfs_regerror(int err, const regex_t *regex) {
+ size_t len = regerror(err, regex, NULL, 0);
+ char *str = malloc(len);
+ if (str) {
+ regerror(err, regex, str, len);
+ }
+ return str;
+}