trace.c: ensure NULL is not passed to printf

[thirdparty/git.git] / tag.c

diff --git a/tag.c b/tag.c
index 28641cf85a0d32357269129f0e8b92bb9e21f399..f789744ccaf5d5fb6f63ba0911a869492affc162 100644 (file)
--- a/tag.c
+++ b/tag.c
@@ -4,6 +4,9 @@
 #include "tree.h"
 #include "blob.h"
 
+#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"
+#define PGP_MESSAGE "-----BEGIN PGP MESSAGE-----"
+
 const char *tag_type = "tag";
 
 struct object *deref_tag(struct object *o, const char *warn, int warnlen)
@@ -133,3 +136,15 @@ int parse_tag(struct tag *item)
        free(data);
        return ret;
 }
+
+size_t parse_signature(const char *buf, unsigned long size)
+{
+       char *eol;
+       size_t len = 0;
+       while (len < size && prefixcmp(buf + len, PGP_SIGNATURE) &&
+                       prefixcmp(buf + len, PGP_MESSAGE)) {
+               eol = memchr(buf + len, '\n', size - len);
+               len += eol ? eol - (buf + len) + 1 : size - len;
+       }
+       return len;
+}