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