mirror of https://github.com/jorio/Pomme.git
81 lines
1.4 KiB
C++
81 lines
1.4 KiB
C++
#include "memstream.h"
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//-----------------------------------------------------------------------------
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// membuf
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membuf::membuf(char* p, size_t n)
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{
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begin = p;
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end = p + n;
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setg(p, p, p + n);
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setp(p, p + n);
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}
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membuf::membuf(std::vector<char>& vector)
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: membuf(vector.data(), vector.size())
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{
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}
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std::streambuf::pos_type membuf::seekoff(off_type off, std::ios_base::seekdir dir, std::ios_base::openmode which)
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{
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pos_type ret = 0;
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if ((which & std::ios_base::in) > 0)
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{
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if (dir == std::ios_base::cur)
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{
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gbump((int32_t) off);
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}
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else if (dir == std::ios_base::end)
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{
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setg(begin, end + off, end);
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}
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else if (dir == std::ios_base::beg)
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{
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setg(begin, begin + off, end);
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}
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ret = gptr() - eback();
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}
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if ((which & std::ios_base::out) > 0)
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{
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if (dir == std::ios_base::cur)
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{
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pbump((int32_t) off);
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}
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else if (dir == std::ios_base::end)
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{
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setp(begin, end + off);
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}
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else if (dir == std::ios_base::beg)
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{
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setp(begin, begin + off);
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}
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ret = pptr() - pbase();
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}
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return ret;
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}
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std::streambuf::pos_type membuf::seekpos(std::streampos pos, std::ios_base::openmode mode)
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{
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return seekoff(pos - pos_type(off_type(0)), std::ios_base::beg, mode);
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}
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//-----------------------------------------------------------------------------
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// memstream
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memstream::memstream(char* p, size_t n)
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: membuf(p, n)
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, std::iostream(this)
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{
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}
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memstream::memstream(std::vector<char>& data)
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: membuf(data)
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, std::iostream(this)
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{
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}
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