1 files changed, 75 insertions, 0 deletions

diff --git a/allocator.c b/allocator.c
new file mode 100644
index 0000000..c498bc7
--- /dev/null
+++ b/allocator.c
@@ -0,0 +1,75 @@
+#include <stdlib.h>
+#include "allocator.h"
+
+/* Interface Code */
+static void *
+default_allocate(struct its1_allocator *allocator, size_t n)
+{
+        (void) allocator;
+        return malloc(n);
+}
+
+static void
+default_deallocate(struct its1_allocator *allocator, void *ptr)
+{
+        (void) allocator;
+        free(ptr);
+}
+
+struct its1_allocator its1_default_allocator = {
+        .allocate = &default_allocate,
+        .deallocate = &default_deallocate
+};
+
+/* Libary Code */
+#include <string.h>
+
+void *
+its1_malloc(struct its1_allocator *allocator, size_t n)
+{
+        if (allocator == NULL) {
+                allocator = &its1_default_allocator;
+        }
+
+        return allocator->allocate(allocator, n);
+}
+
+void
+its1_free(struct its1_allocator *allocator, void *ptr)
+{
+        if (allocator == NULL) {
+                allocator = &its1_default_allocator;
+        }
+
+        allocator->deallocate(allocator, ptr);
+}
+
+char *
+its1_strdup(struct its1_allocator *allocator, const char *str)
+{
+        size_t n;
+        char *dest;
+
+        n = strlen(str) + 1;
+        dest = its1_malloc(allocator, n);
+        if (dest != NULL) {
+                memcpy(dest, str, n);
+        }
+
+        return dest;
+}
+
+void *
+its1_malloc_zero(struct its1_allocator *allocator, size_t n)
+{
+        void *ptr;
+
+        ptr = its1_malloc(allocator, n);
+        if (ptr != NULL) {
+                memset(ptr, 0, n);
+        }
+
+        return ptr;
+}
+
+int main() {}