mirror of
https://github.com/hrydgard/ppsspp.git
synced 2026-10-22 10:49:05 +02:00
Francisco José García García
d037ca1b7b
GetSubFile() reads a whole subfile, and refuses those over 256MB. ReadSubFile() reads a range of one, for the PSAR of a PS1 EBOOT, which holds its disc image.
82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
// Copyright (c) 2013- PPSSPP 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 or later versions.
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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 git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#pragma once
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#include <vector>
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#include "Common/Common.h"
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#include "Common/CommonTypes.h"
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#include "Common/Swap.h"
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enum PBPSubFile {
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PBP_PARAM_SFO,
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PBP_ICON0_PNG,
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PBP_ICON1_PMF,
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PBP_PIC0_PNG,
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PBP_PIC1_PNG,
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PBP_SND0_AT3,
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PBP_EXECUTABLE_PSP,
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PBP_UNKNOWN_PSAR,
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};
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struct PBPHeader {
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char magic[4];
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u32_le version;
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u32_le offsets[8];
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};
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class FileLoader;
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class PBPReader {
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public:
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PBPReader(FileLoader *fileLoader);
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~PBPReader();
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bool IsValid() const { return file_ != nullptr; }
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bool IsELF() const { return file_ == nullptr && isELF_; }
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bool GetSubFile(PBPSubFile file, std::vector<u8> *out) const;
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bool GetSubFileAsString(PBPSubFile file, std::string *out) const;
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// Part of a subfile, for the large ones. False if it doesn't lie within it.
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bool ReadSubFile(PBPSubFile file, u32 offset, size_t size, void *out) const;
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size_t GetSubFileSize(PBPSubFile file) const {
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const int num = (int)file;
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if (num < 0 || num >= (int)ARRAY_SIZE(header_.offsets))
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return 0;
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const u32 start = header_.offsets[num];
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// The last subfile runs to the end of the file, the rest to where the next one starts.
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const u32 stop = num + 1 < (int)ARRAY_SIZE(header_.offsets) ? header_.offsets[num + 1] : (u32)fileSize_;
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// These offsets come out of the file, so they aren't necessarily ordered or even inside it.
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// Subtracting them blind produced a huge size from an underflow.
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if (stop < start || stop > fileSize_)
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return 0;
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return stop - start;
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}
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private:
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FileLoader *file_ = nullptr;
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size_t fileSize_ = 0;
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// Not const: the constructor reads the file straight into this. It used to be, and was written
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// through a cast that stripped the const away - which compiles, but lets the compiler assume the
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// value never changes from the {} it was initialized with.
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PBPHeader header_{};
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bool isELF_ = false;
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};
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