[Piglit] [PATCH 6/8] util: Add piglit_split_string_to_array()

[Chad Versace]

This splits a string into an array of strings, which is useful for
splitting the string returned by eglQueryString(EGL_EXTENSIONS).

Signed-off-by: Chad Versace <chad.versace at linux.intel.com>
---
 tests/util/piglit-util-gl-common.c | 23 +----------------------
 tests/util/piglit-util.c           | 30 ++++++++++++++++++++++++++++++
 tests/util/piglit-util.h           |  3 +++
 3 files changed, 34 insertions(+), 22 deletions(-)

diff --git a/tests/util/piglit-util-gl-common.c b/tests/util/piglit-util-gl-common.c
index f4b7f29..35d233d 100644
--- a/tests/util/piglit-util-gl-common.c
+++ b/tests/util/piglit-util-gl-common.c
@@ -64,32 +64,11 @@ int piglit_get_gl_version(void)
 	return 10*major+minor;
 }
 
-static const char** split_string(const char *string)
-{
-	char **strings, *string_copy;
-	int i, length, max_words;
-
-	length = strlen(string);
-	max_words = length / 2;
-	strings = malloc ((sizeof(char*) * (max_words + 1)) +
-	                  (sizeof(char) * (length + 1)));
-	assert (strings != NULL);
-
-	string_copy = (char*) &strings[max_words + 1];
-	strcpy(string_copy, string);
-
-	strings[0] = strtok(string_copy, " ");
-	for (i = 0; strings[i] != NULL; ++i)
-		strings[i + 1] = strtok(NULL, " ");
-
-	return (const char**) strings;
-}
-
 static const char** gl_extension_array_from_getstring()
 {
 	const char *gl_extensions_string;
 	gl_extensions_string = (const char *) glGetString(GL_EXTENSIONS);
-	return split_string(gl_extensions_string);
+	return piglit_split_string_to_array(gl_extensions_string, " ");
 }
 
 #if defined(PIGLIT_USE_OPENGL)
diff --git a/tests/util/piglit-util.c b/tests/util/piglit-util.c
index 71d55a7..7dd770e 100644
--- a/tests/util/piglit-util.c
+++ b/tests/util/piglit-util.c
@@ -101,6 +101,36 @@ int asprintf(char **strp, const char *fmt, ...)
 
 #endif /* _WIN32 */
 
+/**
+ * \brief Split \a string into an array of strings.
+ *
+ * The null-terminated string \a separators is a list of characters at
+ * which to perform the splits. For example, if separators is " ,", then
+ * the function will split the string at each occurence of ' ' and ','.
+ */
+const char**
+piglit_split_string_to_array(const char *string, const char *separators)
+{
+	char **strings, *string_copy;
+	int i, length, max_words;
+
+	length = strlen(string);
+	max_words = length / 2;
+	strings = malloc((sizeof(char*) * (max_words + 1)) +
+	                 (sizeof(char) * (length + 1)));
+	assert(strings != NULL);
+
+	string_copy = (char*) &strings[max_words + 1];
+	strcpy(string_copy, string);
+
+	strings[0] = strtok(string_copy, separators);
+	for (i = 0; strings[i] != NULL; ++i) {
+		strings[i + 1] = strtok(NULL, separators);
+	}
+
+	return (const char**) strings;
+}
+
 bool piglit_is_extension_in_array(const char **haystack, const char *needle)
 {
 	if (needle[0] == 0)
diff --git a/tests/util/piglit-util.h b/tests/util/piglit-util.h
index 52f053e..0aee833 100644
--- a/tests/util/piglit-util.h
+++ b/tests/util/piglit-util.h
@@ -174,6 +174,9 @@ piglit_source_dir(void);
 size_t
 piglit_join_paths(char buf[], size_t buf_size, int n, ...);
 
+const char**
+piglit_split_string_to_array(const char *string, const char *separators);
+
 #ifdef __cplusplus
 } /* end extern "C" */
 #endif
-- 
1.8.3.1