A bit more refactoring

src/backend/RomHelpers.hpp

@@ -0,0 +1,71 @@
+#pragma once
+#include <log.hpp>
+#include <MemoryHelpers.hpp>
+
+namespace util {
+enum RomTypes {
+  Z64 = 0x80371240,
+  N64 = 0x40123780,
+  V64 = 0x37804012
+};
+
+inline void GetRomCRC(size_t size, u8 *rom, u32 &crc) {
+  RomTypes endianness;
+  memcpy(&endianness, rom, 4);
+  endianness = static_cast<RomTypes>(be32toh(endianness));
+
+  switch (endianness) {
+    case RomTypes::V64: {
+      SwapBuffer16(size, rom);
+      crc = crc32(0, rom, size);
+    }
+      break;
+    case RomTypes::N64: {
+      SwapBuffer32(size, rom);
+      crc = crc32(0, rom, size);
+    }
+      break;
+    case RomTypes::Z64:
+      crc = crc32(0, rom, size);
+      break;
+    default:
+      panic("Unrecognized rom format! Make sure this is a valid Nintendo 64 ROM dump!\n");
+  }
+}
+
+inline void SwapN64Rom(size_t size, u8 *rom, u32 &crc, u32 &cicChecksum) {
+  RomTypes endianness;
+  memcpy(&endianness, rom, 4);
+  endianness = static_cast<RomTypes>(be32toh(endianness));
+
+  switch (endianness) {
+    case RomTypes::V64: {
+      u8 *temp = (u8 *) calloc(size, 1);
+      memcpy(temp, rom, size);
+      SwapBuffer16(size, temp);
+      crc = crc32(0, temp, size);
+      cicChecksum = crc32(0, &temp[0x40], 0x9c0);
+      free(temp);
+      SwapBuffer32(size, rom);
+      SwapBuffer16(size, rom);
+    }
+      break;
+    case RomTypes::N64: {
+      u8 *temp = (u8 *) calloc(size, 1);
+      memcpy(temp, rom, size);
+      SwapBuffer32(size, temp);
+      crc = crc32(0, temp, size);
+      cicChecksum = crc32(0, &temp[0x40], 0x9c0);
+      free(temp);
+    }
+      break;
+    case RomTypes::Z64:
+      crc = crc32(0, rom, size);
+      cicChecksum = crc32(0, &rom[0x40], 0x9c0);
+      SwapBuffer32(size, rom);
+      break;
+    default:
+      panic("Unrecognized rom format! Make sure this is a valid Nintendo 64 ROM dump!\n");
+  }
+}
+}

src/backend/core/Mem.hpp

@@ -3,7 +3,7 @@
 #include <MemoryRegions.hpp>
 #include <core/MMIO.hpp>
 #include <vector>
-#include <MemoryHelpers.hpp>
+#include <RomHelpers.hpp>
 #include <log.hpp>
 
 namespace n64 {