[Piglit] [PATCH] util: Validate extension string in piglit_is_extension_in_string()

[Chad Versace]

If the extension string is not prefixed with "GL_", then fail the test.
This should prevent accidental misuse of the function.

Signed-off-by: Chad Versace <chad.versace at linux.intel.com>
---
 tests/util/piglit-util.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tests/util/piglit-util.c b/tests/util/piglit-util.c
index 6bde4af..960ee70 100644
--- a/tests/util/piglit-util.c
+++ b/tests/util/piglit-util.c
@@ -145,6 +145,14 @@ bool piglit_is_extension_in_string(const char *haystack, const char *needle)
 	if (needle_len == 0)
 		return false;
 
+	/* Validate needle. */
+	if (strncmp(needle, "GL_", 3) != 0) {
+		fprintf(stderr,
+		        "error: extension string \"%s\" must be prefixed with "
+		        "\"GL_\"\n", needle);
+		piglit_report_result(PIGLIT_FAIL);
+	}
+
 	while (true) {
 		const char *const s = strstr(haystack, needle);
 
-- 
1.7.10