t3700-add: add a POSIXPERM prerequisite to a new test

diff --git a/strbuf.c b/strbuf.c
index 6ed06840b856a91f6d215c9a862e064f521384f0..a88496030b7053a543173c299bd9f54b923db2ec 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "refs.h"
 
 int prefixcmp(const char *str, const char *prefix)
 {
@@ -139,14 +140,11 @@ void strbuf_list_free(struct strbuf **sbs)
 
 int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
 {
-       int cmp;
-       if (a->len < b->len) {
-               cmp = memcmp(a->buf, b->buf, a->len);
-               return cmp ? cmp : -1;
-       } else {
-               cmp = memcmp(a->buf, b->buf, b->len);
-               return cmp ? cmp : a->len != b->len;
-       }
+       int len = a->len < b->len ? a->len: b->len;
+       int cmp = memcmp(a->buf, b->buf, len);
+       if (cmp)
+               return cmp;
+       return a->len < b->len ? -1: a->len != b->len;
 }
 
 void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
@@ -360,3 +358,19 @@ int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
 
        return len;
 }
+
+int strbuf_branchname(struct strbuf *sb, const char *name)
+{
+       int len = strlen(name);
+       if (interpret_branch_name(name, sb) == len)
+               return 0;
+       strbuf_add(sb, name, len);
+       return len;
+}
+
+int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
+{
+       strbuf_branchname(sb, name);
+       strbuf_splice(sb, 0, 0, "refs/heads/", 11);
+       return check_ref_format(sb->buf);
+}