liblzma: Add the internal function lzma_alloc_zero().

1 files changed, 6 insertions, 0 deletions

diff --git a/src/liblzma/common/common.h b/src/liblzma/common/common.h
index 42d27d83..b10a72e2 100644
--- a/src/liblzma/common/common.h
+++ b/src/liblzma/common/common.h
@@ -234,6 +234,12 @@ struct lzma_internal_s {
 extern void *lzma_alloc(size_t size, const lzma_allocator *allocator)
 		lzma_attribute((__malloc__)) lzma_attr_alloc_size(1);
 
+/// Allocates memory and zeroes it (like calloc()). This can be faster
+/// than lzma_alloc() + memzero() while being backward compatible with
+/// custom allocators.
+extern void * lzma_attribute((__malloc__)) lzma_attr_alloc_size(1)
+		lzma_alloc_zero(size_t size, const lzma_allocator *allocator);
+
 /// Frees memory
 extern void lzma_free(void *ptr, const lzma_allocator *allocator);