Large blob code cleanup. Compressed ISO ("gcz") support reactivated. Beginnings of raw drive reading code. Deprecate file mapping in an ugly way.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@566 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/DiscIO/Src/FileBlob.cpp

@@ -0,0 +1,121 @@
+// 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>
+
+namespace DiscIO
+{
+
+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 size, u8* out_ptr)
+{
+	LONG offset_high = (LONG)(offset >> 32);
+	SetFilePointer(hFile, (DWORD)(offset & 0xFFFFFFFF), &offset_high, FILE_BEGIN);
+
+	if (size >= 0x100000000ULL)
+		return false; // WTF, does windows really have this limitation?
+
+	DWORD unused;
+	if (!ReadFile(hFile, out_ptr, DWORD(size & 0xFFFFFFFF), &unused, NULL))
+		return false;
+	else
+		return true;
+}
+
+}  // namespace
+
+#else // linux, 64-bit. We do not yet care about linux32
+
+namespace DiscIO
+{
+
+class PlainFileReader : public IBlobReader
+{
+	FILE* file_;
+	s64 size;
+private:
+	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);
+	}
+
+public:
+	static PlainFileReader* Create(const char* filename)
+	{
+		FILE* file_ = fopen(filename, "rb");
+		if (file_)
+		{
+			return new PlainFileReader(file_);
+		}
+		return 0;
+	}
+
+	~PlainFileReader()
+	{
+		fclose(file_);
+	}
+
+	u64 GetDataSize() const	{ return(size); }
+	u64 GetRawSize()  const { return(size); }
+
+	bool Read(u64 offset, u64 nbytes, u8* out_ptr)
+	{
+		fseek(file_, offset, SEEK_SET);
+		fread(out_ptr, nbytes, 1, file_);
+		return true;
+	}
+};
+
+}  // namespace
+
+#endif