58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
#ifndef STREAMCHARSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
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#define STREAMCHARSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
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#if defined(_MSC_VER) || \
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(defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
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(__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
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#pragma once
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#endif
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#include "yaml-cpp/noncopyable.h"
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#include <cstddef>
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namespace YAML {
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class StreamCharSource {
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public:
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StreamCharSource(const Stream& stream) : m_offset(0), m_stream(stream) {
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if (m_stream.ReadAheadTo(0)){
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m_char = m_stream.peek();
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} else {
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m_char = Stream::eof();
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}
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}
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~StreamCharSource() {}
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inline operator bool() const { return m_char != Stream::eof(); }
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char operator[](std::size_t i) const { return m_stream.CharAt(m_offset + i); }
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char get() const { return m_char; }
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bool operator!() const { return !static_cast<bool>(*this); }
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const StreamCharSource operator+(int i) const {
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return StreamCharSource(
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*this, (static_cast<int>(m_offset) + i >= 0) ? m_offset + 1 : 0);
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}
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private:
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std::size_t m_offset;
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const Stream& m_stream;
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char m_char;
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StreamCharSource& operator=(const StreamCharSource&); // non-assignable
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StreamCharSource(const StreamCharSource& source, size_t offset)
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: m_offset(offset), m_stream(source.m_stream) {
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if (m_stream.ReadAheadTo(m_offset)) {
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m_char = m_stream.CharAt(m_offset);
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} else {
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m_char = Stream::eof();
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}
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}
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};
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}
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#endif // STREAMCHARSOURCE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
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