util: extract `stdalloc` allocator into its own module

Right now, the standard allocator is being declared as part of the
"util.h" header as a set of inline functions. As with the crtdbg
allocator functions, these inline functions make it hard to convert to
function pointers for our allocators.

Create a new "stdalloc" module containing our standard allocations
functions to split these out. Convert the existing allocators to macros
which make use of the stdalloc functions.

1 files changed, 40 insertions, 0 deletions

diff --git a/src/stdalloc.h b/src/stdalloc.h
new file mode 100644
index 000000000..17c207210
--- /dev/null
+++ b/src/stdalloc.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_stdalloc_h__
+#define INCLUDE_stdalloc_h__
+
+#include "common.h"
+
+/*
+ * Custom memory allocation wrappers
+ * that set error code and error message
+ * on allocation failure
+ */
+void *git__stdalloc__malloc(size_t len);
+void *git__stdalloc__calloc(size_t nelem, size_t elsize);
+char *git__stdalloc__strdup(const char *str);
+char *git__stdalloc__strndup(const char *str, size_t n);
+/* NOTE: This doesn't do null or '\0' checking.  Watch those boundaries! */
+char *git__stdalloc__substrdup(const char *start, size_t n);
+void *git__stdalloc__realloc(void *ptr, size_t size);
+
+/**
+ * Similar to `git__stdalloc__realloc`, except that it is suitable for reallocing an
+ * array to a new number of elements of `nelem`, each of size `elsize`.
+ * The total size calculation is checked for overflow.
+ */
+void *git__stdalloc__reallocarray(void *ptr, size_t nelem, size_t elsize);
+
+/**
+ * Similar to `git__stdalloc__calloc`, except that it does not zero memory.
+ */
+void *git__stdalloc__mallocarray(size_t nelem, size_t elsize);
+
+void git__stdalloc__free(void *ptr);
+
+#endif