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Support larger iso files (more than 2GB.)

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No actual PSP games are this big (a UMD can only go up to 1.8 GB), but it
can be convenient for combined multi-game discs.  Fixes #5169.
This commit is contained in:
Unknown W. Brackets 2014-01-23 22:00:15 -08:00
parent d69f02dea0
commit 6bdfa5a13a
2 changed files with 10 additions and 13 deletions
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21
Core/FileSystems/BlockDevices.cpp
View File

@ -47,9 +47,9 @@ BlockDevice *constructBlockDevice(const char *filename) {
FileBlockDevice::FileBlockDevice(FILE *file)
: f(file)
{
fseek(f,0,SEEK_END);
filesize = ftell(f);
fseek(f,0,SEEK_SET);
fseek(f, 0, SEEK_END);
filesize = ftello(f);
fseek(f, 0, SEEK_SET);
}
FileBlockDevice::~FileBlockDevice()
@ -59,9 +59,9 @@ FileBlockDevice::~FileBlockDevice()
bool FileBlockDevice::ReadBlock(int blockNumber, u8 *outPtr)
{
fseek(f, blockNumber * GetBlockSize(), SEEK_SET);
if(fread(outPtr, 1, 2048, f) != 2048)
DEBUG_LOG(LOADER, "Could not read 2048 bytes from block");
fseeko(f, (u64)blockNumber * (u64)GetBlockSize(), SEEK_SET);
if (fread(outPtr, 1, 2048, f) != 2048)
DEBUG_LOG(FILESYS, "Could not read 2048 bytes from block");
return true;
}
@ -172,13 +172,10 @@ bool CISOFileBlockDevice::ReadBlock(int blockNumber, u8 *outPtr)
int plain = idx & 0x80000000;
idx = (idx & 0x7FFFFFFF) << indexShift;
idx2 = (idx2 & 0x7FFFFFFF) << indexShift;
u64 compressedReadPos = (u64)(idx & 0x7FFFFFFF) << indexShift;
size_t compressedReadSize = (size_t)(((u64)(idx2 & 0x7FFFFFFF) << indexShift) - compressedReadPos);
u32 compressedReadPos = idx;
u32 compressedReadSize = idx2 - idx;
fseek(f, compressedReadPos, SEEK_SET);
fseeko(f, compressedReadPos, SEEK_SET);
u32 readSize = (u32)fread(inbuffer, 1, compressedReadSize, f);
if (plain)

2
Core/FileSystems/BlockDevices.h
View File

@ -63,7 +63,7 @@ public:
private:
FILE *f;
size_t filesize;
u64 filesize;
};