trace: add trace_strbuf

diff --git a/tag.c b/tag.c
index f789744ccaf5d5fb6f63ba0911a869492affc162..7d38cc0f4de1c16b5b52725ba7a6a361650a6b41 100644 (file)
--- a/tag.c
+++ b/tag.c
@@ -56,7 +56,7 @@ static unsigned long parse_tag_date(const char *buf, const char *tail)
        return strtoul(dateptr, NULL, 10);
 }
 
-int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
+int parse_tag_buffer(struct tag *item, const void *data, unsigned long size)
 {
        unsigned char sha1[20];
        char type[20];
@@ -97,7 +97,9 @@ int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
                item->tagged = NULL;
        }
 
-       if (prefixcmp(bufptr, "tag "))
+       if (bufptr + 4 < tail && !prefixcmp(bufptr, "tag "))
+               ;               /* good */
+       else
                return -1;
        bufptr += 4;
        nl = memchr(bufptr, '\n', tail - bufptr);
@@ -106,7 +108,7 @@ int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
        item->tag = xmemdupz(bufptr, nl - bufptr);
        bufptr = nl + 1;
 
-       if (!prefixcmp(bufptr, "tagger "))
+       if (bufptr + 7 < tail && !prefixcmp(bufptr, "tagger "))
                item->date = parse_tag_date(bufptr, tail);
        else
                item->date = 0;