83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
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/*
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MIT License
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Copyright (c) 2024 - 2025 René Amthor (tobid7)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#include <pd/core/io.hpp>
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namespace PD {
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namespace IO {
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PD_CORE_API std::vector<u8> LoadFile2Mem(const std::string& path) {
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std::ifstream iff(path, std::ios::binary);
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if (!iff) {
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return std::vector<u8>();
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}
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iff.seekg(0, std::ios::end);
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size_t szs = iff.tellg();
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iff.seekg(0, std::ios::beg);
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std::vector<u8> res(szs, 0);
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iff.read(reinterpret_cast<char*>(res.data()), res.size());
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iff.close();
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return res;
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}
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PD_CORE_API u32 HashMemory(const std::vector<u8>& data) {
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u32 hash = 4477;
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for (auto& it : data) {
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hash = (hash * 33) + it;
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}
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return hash;
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}
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PD_CORE_API void DecompressRLE(std::vector<u8>& data) {
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if ((data.size() % 2) != 0) {
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return;
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}
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std::vector<u8> cpy = data;
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data.clear();
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for (size_t i = 0; i < cpy.size(); i += 2) {
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data.insert(data.end(), cpy[i + 1], cpy[i]);
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}
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}
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PD_CORE_API void CompressRLE(std::vector<u8>& data) {
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if (data.empty()) {
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/** No exceptions enabled :( */
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return;
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}
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std::vector<u8> cpy = data;
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data.clear();
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/** 8-Bit RLE */
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data.push_back(0);
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size_t i = 0;
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while (i < cpy.size()) {
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u8 v = cpy[i];
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u8 c = 1;
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while (i + c < cpy.size() && cpy[i + c] == v && c < 255) {
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c++; // c++ ...
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}
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data.push_back(v);
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data.push_back(c);
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i += c;
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}
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}
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} // namespace IO
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} // namespace PD
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