Missing files.

src/mem.c

@@ -0,0 +1,67 @@
+#include "mem.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+size_t max_memory = 0;
+static size_t cur_memory = 0;
+
+#define HEADER_SIZE (sizeof(size_t))
+
+void *
+rmalloc(size_t size) {
+
+	void *ptr;
+
+	if(max_memory && cur_memory > max_memory) {
+		return NULL;
+	}
+
+	cur_memory += size;
+	ptr = malloc(size + HEADER_SIZE);
+	memcpy(ptr, &size, HEADER_SIZE);
+	return ptr + HEADER_SIZE;
+}
+
+void *
+rcalloc(size_t nmemb, size_t size) {
+
+	void *ptr;
+	size_t total = nmemb * size;
+
+	if(max_memory && cur_memory > max_memory) {
+		return NULL;
+	}
+
+	cur_memory += total;
+	ptr = calloc(1, total + HEADER_SIZE);
+	memcpy(ptr, &total, HEADER_SIZE);
+	return ptr + HEADER_SIZE;
+}
+
+char *
+rstrdup(const char *s) {
+
+	char *ret;
+	size_t sz = strlen(s);
+
+	ret = rcalloc(sz + 1, 1);
+	memcpy(ret, s, sz);
+
+	return ret;
+}
+
+void
+rfree(void *ptr) {
+
+	size_t sz;
+	if(!ptr) {
+		return;
+	}
+
+	memcpy(&sz, ptr - HEADER_SIZE, HEADER_SIZE);
+	cur_memory -= sz;
+
+	free(ptr-HEADER_SIZE);
+}
+

src/mem.h

@@ -0,0 +1,20 @@
+#ifndef MEM_H
+#define MEM_H
+
+#include <stdlib.h>
+
+extern size_t max_memory;
+
+void *
+rmalloc(size_t size);
+
+void *
+rcalloc(size_t nmemb, size_t size);
+
+char *
+rstrdup(const char *s);
+
+void
+rfree(void *ptr);
+
+#endif