mirror of
https://github.com/neocturne/MinedMap.git
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68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
/*
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Copyright (c) 2015, Matthias Schiffer <mschiffer@universe-factory.net>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "GZip.hpp"
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#include <system_error>
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#include <stdexcept>
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#include <zlib.h>
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namespace MinedMap {
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std::vector<uint8_t> readGZip(const char *filename) {
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std::vector<uint8_t> buffer;
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size_t len = 0;
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gzFile f = gzopen(filename, "rb");
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if (!f)
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throw std::system_error(
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errno, std::generic_category(),
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(std::string("unable to open file ") + filename).c_str()
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);
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while (true) {
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if ((buffer.size() - len) < 4096)
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buffer.resize(buffer.size() + 4096);
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int r = gzread(f, buffer.data()+len, buffer.size()-len);
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if (r < 0)
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throw std::system_error(errno, std::generic_category(), "error reading GZip file");
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if (!r)
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break;
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len += r;
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}
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gzclose_r(f);
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buffer.resize(len);
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return buffer;
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}
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}
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