gremlin/libs/yaml-cpp/src/stream.h
2011-01-24 23:52:12 +01:00

81 lines
1.8 KiB
C++

#pragma once
#ifndef STREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66
#define STREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66
#include "noncopyable.h"
#include "mark.h"
#include <deque>
#include <ios>
#include <string>
#include <iostream>
#include <set>
namespace YAML
{
static const size_t MAX_PARSER_PUSHBACK = 8;
class Stream: private noncopyable
{
public:
friend class StreamCharSource;
Stream(std::istream& input);
~Stream();
operator bool() const;
bool operator !() const { return !static_cast <bool>(*this); }
char peek() const;
char get();
std::string get(int n);
void eat(int n = 1);
static char eof() { return 0x04; }
const Mark mark() const { return m_mark; }
int pos() const { return m_mark.pos; }
int line() const { return m_mark.line; }
int column() const { return m_mark.column; }
void ResetColumn() { m_mark.column = 0; }
private:
enum CharacterSet {utf8, utf16le, utf16be, utf32le, utf32be};
std::istream& m_input;
Mark m_mark;
CharacterSet m_charSet;
unsigned char m_bufPushback[MAX_PARSER_PUSHBACK];
mutable size_t m_nPushedBack;
mutable std::deque<char> m_readahead;
unsigned char* const m_pPrefetched;
mutable size_t m_nPrefetchedAvailable;
mutable size_t m_nPrefetchedUsed;
void AdvanceCurrent();
char CharAt(size_t i) const;
bool ReadAheadTo(size_t i) const;
bool _ReadAheadTo(size_t i) const;
void StreamInUtf8() const;
void StreamInUtf16() const;
void StreamInUtf32() const;
unsigned char GetNextByte() const;
};
// CharAt
// . Unchecked access
inline char Stream::CharAt(size_t i) const {
return m_readahead[i];
}
inline bool Stream::ReadAheadTo(size_t i) const {
if(m_readahead.size() > i)
return true;
return _ReadAheadTo(i);
}
}
#endif // STREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66