trace: add trace_strbuf

diff --git a/tag.c b/tag.c
index 28641cf85a0d32357269129f0e8b92bb9e21f399..7d38cc0f4de1c16b5b52725ba7a6a361650a6b41 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)
@@ -53,7 +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];
@@ -94,7 +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);
@@ -103,7 +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;
@@ -133,3 +138,15 @@ 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;
+}