55 lines
1.1 KiB
C++
55 lines
1.1 KiB
C++
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#include "myirc/linebuffer.hpp"
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namespace myirc {
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auto LineBuffer::next_line() -> char*
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{
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auto const nl = std::find(search_, end_, '\n');
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if (nl == end_) // no newline found, line incomplete
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{
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search_ = end_;
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return nullptr;
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}
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// Null-terminate the line. Support both \n and \r\n
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*(start_ < nl && *std::prev(nl) == '\r' ? std::prev(nl) : nl) = '\0';
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auto const result = start_;
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start_ = search_ = std::next(nl);
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return &*result;
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}
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// Get the next complete line skipping over empty lines
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auto LineBuffer::next_nonempty_line() -> char*
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{
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char* line;
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while ((line = next_line()))
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{
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while (*line == ' ')
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{
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line++;
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}
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if ('\0' != *line)
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{
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break;
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}
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}
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return line;
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}
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auto LineBuffer::shift() -> void
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{
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auto const first = std::begin(buffer_);
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auto const gap = std::distance(start_, first);
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if (gap != 0) // relocate incomplete line to front of buffer
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{
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end_ = std::move(start_, end_, first);
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start_ = first;
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std::advance(search_, gap);
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}
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}
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} // namespace myirc
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