CPlayerState imps

mpcksum/main.cpp

@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include "athena/MemoryReader.hpp"
+#include "athena/FileWriter.hpp"
+#include "athena/Checksums.hpp"
+
+#if __BYTE_ORDER__ == __BIG_ENDIAN
+#define SBIG(q) q
+#else
+#define SBIG(q) ( ( (q) & 0x000000FF ) << 24 | ( (q) & 0x0000FF00 ) <<  8 \
+                | ( (q) & 0x00FF0000 ) >>  8 | ( (q) & 0xFF000000 ) >> 24 )
+#endif
+
+int main(int argc, char* argv[])
+{
+    if (argc < 2)
+    {
+        printf("mpcksum <save> [output]\n");
+        return 1;
+    }
+
+    athena::io::MemoryCopyReader in(argv[1]);
+    std::unique_ptr<athena::io::FileWriter> out;
+    if (argc > 2)
+        out.reset(new athena::io::FileWriter(argv[2]));
+    else
+        out.reset(new athena::io::FileWriter(argv[1]));
+
+    atUint32 magic;
+    in.readUBytesToBuf(&magic, 4);
+    if (magic != SBIG('GM8E') && magic != SBIG('GM8P') && magic != SBIG('GM8J'))
+    {
+        printf("Unsupported file, MP .gci file expected\n");
+        return 1;
+    }
+
+    if (in.length() != 8256)
+    {
+        printf("File too small expected 8,256 bytes got %llu", in.length());
+        return 1;
+    }
+
+    atUint8* data = in.data();
+
+    atUint32 newCkSum = athena::Checksums::crc32(data + 68, 8188, 0);
+    *(atUint32*)(data + 64) = SBIG(newCkSum);
+    out->writeBytes(data, 8256);
+
+    delete data;
+
+    return 0;
+}