109 lines
2.2 KiB
C++
109 lines
2.2 KiB
C++
/*
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** rwmem.cpp
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**
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** This file is part of mkxp.
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**
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** Copyright (C) 2013 - 2021 Amaryllis Kulla <ancurio@mapleshrine.eu>
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**
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** mkxp 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, either version 2 of the License, or
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** (at your option) any later version.
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**
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** mkxp 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 for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with mkxp. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "rwmem.h"
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#include "util.h"
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#include <SDL_rwops.h>
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#include <vector>
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typedef std::vector<char> ByteVec;
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static inline ByteVec *
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getRWPrivate(SDL_RWops *ops)
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{
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return static_cast<ByteVec*>(ops->hidden.unknown.data1);
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}
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static Sint64 SDL_RWopsSize(SDL_RWops *ops)
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{
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ByteVec *v = getRWPrivate(ops);
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return v->size();
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}
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static Sint64 SDL_RWopsSeek(SDL_RWops *, Sint64, int)
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{
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/* No need for implementation */
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return -1;
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}
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static size_t SDL_RWopsRead(SDL_RWops *, void *, size_t, size_t)
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{
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/* No need for implementation */
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return 0;
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}
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static size_t SDL_RWopsWrite(SDL_RWops *ops, const void *buffer, size_t size, size_t num)
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{
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ByteVec *v = getRWPrivate(ops);
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size_t writeBytes = size * num;
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if (writeBytes == 1)
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{
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char byte = *static_cast<const char*>(buffer);
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v->push_back(byte);
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return 1;
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}
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size_t writeInd = v->size();
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v->resize(writeInd + writeBytes);
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memcpy(&(*v)[writeInd], buffer, writeBytes);
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return num;
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}
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static int SDL_RWopsClose(SDL_RWops *ops)
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{
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ByteVec *v = getRWPrivate(ops);
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delete v;
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return 0;
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}
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void RWMemOpen(SDL_RWops *ops)
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{
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ByteVec *v = new ByteVec;
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ops->hidden.unknown.data1 = v;
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ops->size = SDL_RWopsSize;
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ops->seek = SDL_RWopsSeek;
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ops->read = SDL_RWopsRead;
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ops->write = SDL_RWopsWrite;
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ops->close = SDL_RWopsClose;
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}
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int RWMemGetData(SDL_RWops *ops, void *buffer)
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{
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ByteVec *v = getRWPrivate(ops);
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if (buffer)
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memcpy(buffer, dataPtr(*v), v->size());
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return v->size();
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}
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