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84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/* Copyright (c) 2016, Pollard Banknote Limited
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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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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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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
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "current_path.h"
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#include <cerrno>
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#include <unistd.h>
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namespace cpp17
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{
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namespace filesystem
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{
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path
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current_path()
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{
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char buf[4096];
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if(::getcwd(buf, sizeof(buf)))
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{
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return buf;
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}
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// Dynamically allocate larger buffers until cwd fits
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std::size_t size = 2 * sizeof(buf);
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while(true)
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{
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char* q = new char[size];
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if(::getcwd(q, size))
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{
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path p = q;
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delete[] q;
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return p;
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}
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else
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{
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if(errno == ERANGE)
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{
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delete[] q;
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size *= 2;
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}
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else
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{
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delete[] q;
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break;
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}
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}
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}
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return path();
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}
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} // namespace filesystem
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} // namespace cpp17
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