dolphin/Source/Core/DiscIO/Src/FileBlob.cpp

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// Copyright (C) 2003-2008 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "stdafx.h"
#include "Blob.h"
#include "FileBlob.h"
#ifdef _WIN32
#include <windows.h>
#endif
namespace DiscIO
{
#ifdef _WIN32
PlainFileReader::PlainFileReader(HANDLE hFile_)
{
hFile = hFile_;
DWORD size_low, size_high;
size_low = GetFileSize(hFile, &size_high);
size = ((u64)size_low) | ((u64)size_high << 32);
}
PlainFileReader* PlainFileReader::Create(const char* filename)
{
HANDLE hFile = CreateFile(
filename, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL);
if (hFile != INVALID_HANDLE_VALUE)
return new PlainFileReader(hFile);
else
return 0;
}
PlainFileReader::~PlainFileReader()
{
CloseHandle(hFile);
}
bool PlainFileReader::Read(u64 offset, u64 nbytes, u8* out_ptr)
{
LONG offset_high = (LONG)(offset >> 32);
SetFilePointer(hFile, (DWORD)(offset & 0xFFFFFFFF), &offset_high, FILE_BEGIN);
if (nbytes >= 0x100000000ULL)
return false; // WTF, does windows really have this limitation?
DWORD unused;
if (!ReadFile(hFile, out_ptr, DWORD(nbytes & 0xFFFFFFFF), &unused, NULL))
return false;
else
return true;
}
#else // POSIX
PlainFileReader::PlainFileReader(FILE* file__)
{
file_ = file__;
#if 0
fseek64(file_, 0, SEEK_END);
#else
fseek(file_, 0, SEEK_END); // I don't have fseek64 with gcc 4.3
#endif
size = ftell(file_);
fseek(file_, 0, SEEK_SET);
}
PlainFileReader* PlainFileReader::Create(const char* filename)
{
FILE* file_ = fopen(filename, "rb");
if (file_)
return new PlainFileReader(file_);
else
return 0;
}
PlainFileReader::~PlainFileReader()
{
fclose(file_);
}
bool PlainFileReader::Read(u64 offset, u64 nbytes, u8* out_ptr)
{
int seekStatus = fseek(file_, offset, SEEK_SET);
if (seekStatus != 0)
return false;
size_t bytesRead = fread(out_ptr, 1, nbytes, file_);
return bytesRead == nbytes;
}
#endif
} // namespace