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support importing newer style ardsi duc files

This commit is contained in:
zeromus 2016-09-30 05:08:23 +00:00
parent 4af90cd902
commit 284119237e
1 changed files with 26 additions and 9 deletions
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35
desmume/src/mc.cpp
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@ -1504,26 +1504,43 @@ u32 BackupDevice::get_save_duc_size(const char* fname)
bool BackupDevice::import_duc(const char* filename, u32 force_size)
{
u32 size;
char id[16];
u8 id16[16] = {0}, id4[4] = {0}, id2[2] = {0};
FILE* file = fopen(filename, "rb");
if(!file) return false;
fseek(file, 0, SEEK_END);
size = (u32)ftell(file) - 500;
fseek(file, 0, SEEK_SET);
int version = 0;
// Make sure we really have the right file
fread((void *)id, sizeof(char), 16, file);
//ID version 1
fread(id16, 1, 16, file);
if(!memcmp(id16, "ARDS000000000001", 16)) version = 1;
if (memcmp(id, "ARDS000000000001", 16) != 0)
//ID version 2
fseek(file,0xA2,SEEK_SET);
fread(id2,1,2,file);
if(!memcmp(id16,"\0\0\0\0",4) && !memcmp(id2,"\x04\xC0",2)) version = 2;
if(version == 0)
{
printf("Not recognized as a valid DUC file\n");
fclose(file);
return false;
}
// Skip the rest of the header since we don't need it
fseek(file, 500, SEEK_SET);
fseek(file, 0, SEEK_END);
size = (u32)ftell(file);
//skip to raw data
if(version == 1)
{
size -= 500;
fseek(file, 500, SEEK_SET);
}
if(version == 2)
{
size -= 0xA4;
fseek(file, 0xA4, SEEK_SET);
}
u32 left = 0;
if (force_size > 0)