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-rw-r--r--t/helper/test-regex.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/t/helper/test-regex.c b/t/helper/test-regex.c
new file mode 100644
index 0000000000..b5ea8a97c5
--- /dev/null
+++ b/t/helper/test-regex.c
@@ -0,0 +1,75 @@
+#include "git-compat-util.h"
+#include "gettext.h"
+
+struct reg_flag {
+ const char *name;
+ int flag;
+};
+
+static struct reg_flag reg_flags[] = {
+ { "EXTENDED", REG_EXTENDED },
+ { "NEWLINE", REG_NEWLINE },
+ { "ICASE", REG_ICASE },
+ { "NOTBOL", REG_NOTBOL },
+#ifdef REG_STARTEND
+ { "STARTEND", REG_STARTEND },
+#endif
+ { NULL, 0 }
+};
+
+static int test_regex_bug(void)
+{
+ char *pat = "[^={} \t]+";
+ char *str = "={}\nfred";
+ regex_t r;
+ regmatch_t m[1];
+
+ if (regcomp(&r, pat, REG_EXTENDED | REG_NEWLINE))
+ die("failed regcomp() for pattern '%s'", pat);
+ if (regexec(&r, str, 1, m, 0))
+ die("no match of pattern '%s' to string '%s'", pat, str);
+
+ /* http://sourceware.org/bugzilla/show_bug.cgi?id=3957 */
+ if (m[0].rm_so == 3) /* matches '\n' when it should not */
+ die("regex bug confirmed: re-build git with NO_REGEX=1");
+
+ return 0;
+}
+
+int cmd_main(int argc, const char **argv)
+{
+ const char *pat;
+ const char *str;
+ int flags = 0;
+ regex_t r;
+ regmatch_t m[1];
+
+ if (argc == 2 && !strcmp(argv[1], "--bug"))
+ return test_regex_bug();
+ else if (argc < 3)
+ usage("test-regex --bug\n"
+ "test-regex <pattern> <string> [<options>]");
+
+ argv++;
+ pat = *argv++;
+ str = *argv++;
+ while (*argv) {
+ struct reg_flag *rf;
+ for (rf = reg_flags; rf->name; rf++)
+ if (!strcmp(*argv, rf->name)) {
+ flags |= rf->flag;
+ break;
+ }
+ if (!rf->name)
+ die("do not recognize %s", *argv);
+ argv++;
+ }
+ git_setup_gettext();
+
+ if (regcomp(&r, pat, flags))
+ die("failed regcomp() for pattern '%s'", pat);
+ if (regexec(&r, str, 1, m, 0))
+ return 1;
+
+ return 0;
+}