Add ox_memcmp.

src/ox/std/CMakeLists.txt

@@ -15,3 +15,7 @@ install(
 	DESTINATION
 		include/ox/std
 )
+
+if(OX_BUILD_EXEC STREQUAL "ON")
+	add_subdirectory(test)
+endif()

src/ox/std/memops.cpp

@@ -7,6 +7,22 @@
  */
 #include "memops.hpp"
 
+int ox_memcmp(const void *ptr1, const void *ptr2, size_t size) {
+	int retval = 0;
+	auto block1 = ((uint8_t*) ptr1);
+	auto block2 = ((uint8_t*) ptr2);
+	for (size_t i = 0; i < size; i++) {
+		if (block1[i] < block2[i]) {
+			retval = -1;
+			break;
+		} else if (block1[i] > block2[i]) {
+			retval = 1;
+			break;
+		}
+	}
+	return retval;
+}
+
 void *ox_memcpy(void *dest, const void *src, int64_t size) {
 	char *srcBuf = (char*) src;
 	char *dstBuf = (char*) dest;

src/ox/std/memops.hpp

@@ -9,6 +9,8 @@
 
 #include "types.hpp"
 
+int ox_memcmp(const void *ptr1, const void *ptr2, size_t size);
+
 void *ox_memcpy(void *src, const void *dest, int64_t size);
 
 void *ox_memset(void *ptr, int val, int64_t size);

src/ox/std/test/CMakeLists.txt

@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 2.8)
+
+add_executable(
+	StdTest
+		tests.cpp
+)
+
+target_link_libraries(StdTest OxStd)
+
+add_test("Test\\ ox_memcmp" StdTest "ox_memcmp")

src/ox/std/test/tests.cpp

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2015 - 2016 gtalent2@gmail.com
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+#include <iostream>
+#include <map>
+#include <functional>
+#include <ox/std/std.hpp>
+
+::std::map<std::string, std::function<int()>> tests = {
+	{
+		"ox_memcmp",
+		[]() {
+			int success = 1;
+			const char *data1 = "ABCDEFG";
+			const char *data2 = "HIJKLMN";
+			success &= ox_memcmp(data1, data2, 7) < 0;
+			success &= ox_memcmp(data2, data1, 7) > 0;
+			success &= ox_memcmp(data1, data1, 7) == 0;
+			return !success;
+		}
+	}
+};
+
+int main(int argc, const char **args) {
+	if (argc > 1) {
+		auto testName = args[1];
+		if (tests.find(testName) != tests.end()) {
+			return tests[testName]();
+		}
+	}
+	return -1;
+}