From c8220a2cd2178a4975f8dc6c09ab59098cf86a12 Mon Sep 17 00:00:00 2001
From: Bartosz Golaszewski <bartekgola@gmail.com>
Date: Thu, 8 Jun 2017 15:11:45 +0200
Subject: [PATCH] tests: add regex handling

Add a routine allowing to check if a string contains a substring
matching against given regex pattern.

Also: add a corresponding assertion.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
---
 tests/gpiod-test.c | 29 +++++++++++++++++++++++++++++
 tests/gpiod-test.h |  3 +++
 2 files changed, 32 insertions(+)

diff --git a/tests/gpiod-test.c b/tests/gpiod-test.c
index ae76dfb..49a8e7f 100644
--- a/tests/gpiod-test.c
+++ b/tests/gpiod-test.c
@@ -21,6 +21,7 @@
 #include <libkmod.h>
 #include <libudev.h>
 #include <pthread.h>
+#include <regex.h>
 #include <sys/time.h>
 #include <sys/utsname.h>
 #include <sys/types.h>
@@ -980,3 +981,31 @@ void test_set_event(unsigned int chip_index, unsigned int line_offset,
 
 	event_unlock();
 }
+
+bool test_regex_match(const char *str, const char *pattern)
+{
+	char errbuf[128];
+	regex_t regex;
+	bool ret;
+	int rv;
+
+	rv = regcomp(&regex, pattern, REG_EXTENDED | REG_NEWLINE);
+	if (rv) {
+		regerror(rv, &regex, errbuf, sizeof(errbuf));
+		die("unable to compile regex '%s': %s", pattern, errbuf);
+	}
+
+	rv = regexec(&regex, str, 0, 0, 0);
+	if (rv == REG_NOERROR) {
+		ret = true;
+	} else if (rv == REG_NOMATCH) {
+		ret = false;
+	} else {
+		regerror(rv, &regex, errbuf, sizeof(errbuf));
+		die("unable to run a regex match: %s", errbuf);
+	}
+
+	regfree(&regex);
+
+	return ret;
+}
diff --git a/tests/gpiod-test.h b/tests/gpiod-test.h
index 63ad26c..5c88ad0 100644
--- a/tests/gpiod-test.h
+++ b/tests/gpiod-test.h
@@ -127,6 +127,8 @@ void test_free_str(char **str);
 void test_free_chip_iter(struct gpiod_chip_iter **iter);
 void test_free_chip_iter_noclose(struct gpiod_chip_iter **iter);
 
+bool test_regex_match(const char *str, const char *pattern);
+
 #define TEST_ASSERT(statement)						\
 	do {								\
 		if (!(statement)) {					\
@@ -145,5 +147,6 @@ void test_free_chip_iter_noclose(struct gpiod_chip_iter **iter);
 #define TEST_ASSERT_NOTEQ(a1, a2)	TEST_ASSERT(a1 != a2)
 #define TEST_ASSERT_STR_EQ(s1, s2)	TEST_ASSERT(strcmp(s1, s2) == 0)
 #define TEST_ASSERT_STR_CONTAINS(s, p)	TEST_ASSERT(strstr(s, p) != NULL)
+#define TEST_ASSERT_REGEX_MATCH(s, p)	TEST_ASSERT(test_regex_match(s, p))
 
 #endif /* __GPIOD_TEST_H__ */
-- 
2.30.2