add endian functions

engine/src/endian.c

@@ -0,0 +1,64 @@
+#include <GearBox/Endian.h>
+
+#ifdef GBEndianHostLittle
+static void swap(void* from, void* to, int size) {
+	unsigned char* f = from;
+	unsigned char* t = to;
+
+	int i;
+
+	for(i = 0; i < size; i++) {
+		t[size - 1 - i] = f[i];
+	}
+}
+
+#define SWAP(in, out) swap(&in, &out, sizeof(in))
+
+GBI16 GBEndianSwapI16BE(GBI16 in) {
+	GBI16 out;
+
+	SWAP(in, out);
+
+	return out;
+}
+
+GBI32 GBEndianSwapI32BE(GBI32 in) {
+	GBI32 out;
+
+	SWAP(in, out);
+
+	return out;
+}
+
+GBI64 GBEndianSwapI64BE(GBI64 in) {
+	GBI64 out;
+
+	SWAP(in, out);
+
+	return out;
+}
+
+GBU16 GBEndianSwapU16BE(GBU16 in) {
+	GBU16 out;
+
+	SWAP(in, out);
+
+	return out;
+}
+
+GBU32 GBEndianSwapU32BE(GBU32 in) {
+	GBU32 out;
+
+	SWAP(in, out);
+
+	return out;
+}
+
+GBU64 GBEndianSwapU64BE(GBU64 in) {
+	GBU64 out;
+
+	SWAP(in, out);
+
+	return out;
+}
+#endif