Add string utility functions for prefix and suffix compares

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/util.c b/src/util.c
index 64b5d4fbe..feb1bd8ab 100644
--- a/src/util.c
+++ b/src/util.c
@@ -24,3 +24,23 @@ char *git__strdup(const char *s)
 		return git_ptr_error(GIT_ENOMEM);
 	return r;
 }
+
+int git__prefixcmp(const char *str, const char *prefix)
+{
+	for (;;) {
+		char p = *(prefix++), s;
+		if (!p)
+			return 0;
+		if ((s = *(str++)) != p)
+			return s - p;
+	}
+}
+
+int git__suffixcmp(const char *str, const char *suffix)
+{
+	size_t a = strlen(str);
+	size_t b = strlen(suffix);
+	if (a < b)
+		return -1;
+	return strcmp(str + (a - b), suffix);
+}