1 files changed, 81 insertions, 0 deletions
diff --git a/rtrlib/lib/alloc_utils.c b/rtrlib/lib/alloc_utils.c
new file mode 100644
index 0000000..e3d6831
--- /dev/null
+++ b/rtrlib/lib/alloc_utils.c
@@ -0,0 +1,81 @@
+/*
+ * This file is part of RTRlib.
+ *
+ * This file is subject to the terms and conditions of the MIT license.
+ * See the file LICENSE in the top level directory for more details.
+ *
+ * Website: http://rtrlib.realmv6.org/
+ */
+
+#include "alloc_utils_private.h"
+
+#include "rtrlib/rtrlib_export_private.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void *(*MALLOC_PTR)(size_t size) = malloc;
+static void *(*REALLOC_PTR)(void *ptr, size_t size) = realloc;
+static void (*FREE_PTR)(void *ptr) = free;
+
+/* cppcheck-suppress unusedFunction */
+RTRLIB_EXPORT void lrtr_set_alloc_functions(void *(*malloc_function)(size_t size),
+					    void *(*realloc_function)(void *ptr, size_t size),
+					    void(free_function)(void *ptr))
+{
+	MALLOC_PTR = malloc_function;
+	REALLOC_PTR = realloc_function;
+	FREE_PTR = free_function;
+}
+
+inline void *lrtr_malloc(size_t size)
+{
+	return MALLOC_PTR(size);
+}
+
+/* cppcheck-suppress unusedFunction */
+void *lrtr_calloc(size_t nmemb, size_t size)
+{
+	int bytes = 0;
+
+#if __GNUC__ >= 5
+	if (__builtin_mul_overflow(nmemb, size, &bytes)) {
+		errno = ENOMEM;
+		return 0;
+	}
+#else
+	if (size && nmemb > (size_t)-1 / size) {
+		errno = ENOMEM;
+		return 0;
+	}
+	bytes = size * nmemb;
+#endif
+	void *p = lrtr_malloc(bytes);
+
+	if (!p)
+		return p;
+
+	return memset(p, 0, bytes);
+}
+
+inline void lrtr_free(void *ptr)
+{
+	return FREE_PTR(ptr);
+}
+
+inline void *lrtr_realloc(void *ptr, size_t size)
+{
+	return REALLOC_PTR(ptr, size);
+}
+
+char *lrtr_strdup(const char *string)
+{
+	assert(string);
+
+	size_t length = strlen(string) + 1;
+	char *new_string = lrtr_malloc(length);
+
+	return new_string ? memcpy(new_string, string, length) : NULL;
+}