add common fsck error printing function

Signed-off-by: Martin Koegler <mkoegler@auto.tuwien.ac.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/fsck.c b/fsck.c
index 06808621517fe7134893018dff66a4295716780e..6883d1bd68d158290acb18ae9b4e8baba7525201 100644 (file)
--- a/fsck.c
+++ b/fsck.c
@@ -304,3 +304,32 @@ int fsck_object(struct object *obj, int strict, fsck_error error_func)
        return error_func(obj, FSCK_ERROR, "unknown type '%d' (internal fsck error)",
                          obj->type);
 }
+
+int fsck_error_function(struct object *obj, int type, const char *fmt, ...)
+{
+       va_list ap;
+       int len;
+       struct strbuf sb;
+
+       strbuf_init(&sb, 0);
+       strbuf_addf(&sb, "object %s:", obj->sha1?sha1_to_hex(obj->sha1):"(null)");
+
+       va_start(ap, fmt);
+       len = vsnprintf(sb.buf + sb.len, strbuf_avail(&sb), fmt, ap);
+       va_end(ap);
+
+       if (len < 0)
+               len = 0;
+       if (len >= strbuf_avail(&sb)) {
+               strbuf_grow(&sb, len + 2);
+               va_start(ap, fmt);
+               len = vsnprintf(sb.buf + sb.len, strbuf_avail(&sb), fmt, ap);
+               va_end(ap);
+               if (len >= strbuf_avail(&sb))
+                       die("this should not happen, your snprintf is broken");
+       }
+
+       error(sb.buf);
+       strbuf_release(&sb);
+       return 1;
+}

diff --git a/fsck.h b/fsck.h
index 9bd37c9f1cabb0c9ffb404e1f0f846b5123638e5..990ee02335a2e2693e32baa82b259c23843f2aa0 100644 (file)
--- a/fsck.h
+++ b/fsck.h
@@ -17,6 +17,8 @@ typedef int (*fsck_walk_func)(struct object *obj, int type, void *data);
 /* callback for fsck_object, type is FSCK_ERROR or FSCK_WARN */
 typedef int (*fsck_error)(struct object *obj, int type, const char *err, ...);
 
+int fsck_error_function(struct object *obj, int type, const char *fmt, ...);
+
 /* descend in all linked child objects
  * the return value is:
  *    -1       error in processing the object