Imported Upstream version 2.10.2upstream/2.10.2

1 files changed, 14 insertions, 11 deletions

diff --git a/git-compat-util.h b/git-compat-util.h
index 2c949983..b4d9c2aa 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -798,6 +798,14 @@ extern FILE *fopen_for_writing(const char *path);
 #define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc)))
 #define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc)))
 
+#define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \
+	BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src))))
+static inline void copy_array(void *dst, const void *src, size_t n, size_t size)
+{
+	if (n)
+		memcpy(dst, src, st_mult(size, n));
+}
+
 /*
  * These functions help you allocate structs with flex arrays, and copy
  * the data directly into the array. For example, if you had:
@@ -840,11 +848,14 @@ extern FILE *fopen_for_writing(const char *path);
  * times, and it must be assignable as an lvalue.
  */
 #define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \
-	(x) = NULL; /* silence -Wuninitialized for offset calculation */ \
-	(x) = xalloc_flex(sizeof(*(x)), (char *)(&((x)->flexname)) - (char *)(x), (buf), (len)); \
+	size_t flex_array_len_ = (len); \
+	(x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \
+	memcpy((void *)(x)->flexname, (buf), flex_array_len_); \
 } while (0)
 #define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \
-	(x) = xalloc_flex(sizeof(*(x)), sizeof(*(x)), (buf), (len)); \
+	size_t flex_array_len_ = (len); \
+	(x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \
+	memcpy((x) + 1, (buf), flex_array_len_); \
 	(x)->ptrname = (void *)((x)+1); \
 } while(0)
 #define FLEX_ALLOC_STR(x, flexname, str) \
@@ -852,14 +863,6 @@ extern FILE *fopen_for_writing(const char *path);
 #define FLEXPTR_ALLOC_STR(x, ptrname, str) \
 	FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str))
 
-static inline void *xalloc_flex(size_t base_len, size_t offset,
-				const void *src, size_t src_len)
-{
-	unsigned char *ret = xcalloc(1, st_add3(base_len, src_len, 1));
-	memcpy(ret + offset, src, src_len);
-	return ret;
-}
-
 static inline char *xstrdup_or_null(const char *str)
 {
 	return str ? xstrdup(str) : NULL;