patch 9.0.1418: the included xdiff code is a bit outdated
Problem: The included xdiff code is a bit outdated.
Solution: Sync with the latest git xdiff code. (Yee Cheng Chin,
closes #12181)
diff --git a/src/xdiff/xutils.c b/src/xdiff/xutils.c
index f13a854..a4370e6 100644
--- a/src/xdiff/xutils.c
+++ b/src/xdiff/xutils.c
@@ -122,7 +122,7 @@
long nl = 0, size, tsize = 0;
char const *data, *cur, *top;
- if ((cur = data = xdl_mmfile_first(mf, &size)) != NULL) {
+ if ((cur = data = xdl_mmfile_first(mf, &size))) {
for (top = data + size; nl < sample && cur < top; ) {
nl++;
if (!(cur = memchr(cur, '\n', top - cur)))
@@ -432,3 +432,20 @@
return 0;
}
+
+void* xdl_alloc_grow_helper(void *p, long nr, long *alloc, size_t size)
+{
+ void *tmp = NULL;
+ size_t n = ((LONG_MAX - 16) / 2 >= *alloc) ? 2 * *alloc + 16 : LONG_MAX;
+ if (nr > (long)n)
+ n = nr;
+ if (SIZE_MAX / size >= n)
+ tmp = xdl_realloc(p, n * size);
+ if (tmp) {
+ *alloc = n;
+ } else {
+ xdl_free(p);
+ *alloc = 0;
+ }
+ return tmp;
+}