static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
{
+ int match_beginning, match_end;
char *buf = desc->buffer;
const char *patch = frag->patch;
int offset, size = frag->size;
newlines = new;
leading = frag->leading;
trailing = frag->trailing;
+
+ /*
+ * If we don't have any leading/trailing data in the patch,
+ * we want it to match at the beginning/end of the file.
+ */
+ match_beginning = !leading && (frag->oldpos == 1);
+ match_end = !trailing;
+
lines = 0;
pos = frag->newpos;
for (;;) {
offset = find_offset(buf, desc->size, oldlines, oldsize, pos, &lines);
+ if (match_end && offset + oldsize != desc->size)
+ offset = -1;
+ if (match_beginning && offset)
+ offset = -1;
if (offset >= 0) {
int diff = newsize - oldsize;
unsigned long size = desc->size + diff;
/* Am I at my context limits? */
if ((leading <= p_context) && (trailing <= p_context))
break;
+ if (match_beginning || match_end) {
+ match_beginning = match_end = 0;
+ continue;
+ }
/* Reduce the number of context lines
* Reduce both leading and trailing if they are equal
* otherwise just reduce the larger context.