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#pragma once
#include "Stream.h"
#include "TextFile.h"
//////////////////////////////////////////////////////////////////////////
// Supports Utf8 and Utf16, little and big endian.
//////////////////////////////////////////////////////////////////////////
class TextReader {
public:
virtual ~TextReader();
virtual textfile::Format format() = 0;
virtual wchar_t get() = 0;
virtual void seek(nat position) { stream->seek(position); };
inline nat position() const { return nat(stream->pos()); };
inline bool atEnd() const { return !stream->more(); };
inline bool more() const { return stream->more(); };
String getLine();
String getAll();
inline Stream *getStream() const { return stream; };
// Takes ownership of 'stream'.
static TextReader *create(Stream *stream);
protected:
TextReader(Stream *stream);
Stream *stream;
};
namespace textfile {
class Utf8Reader : public TextReader {
public:
Utf8Reader(Stream *stream, bool bom);
virtual ~Utf8Reader();
virtual textfile::Format format() { return bom ? textfile::utf8 : textfile::utf8noBom; };
virtual void seek(nat position);
virtual wchar_t get();
private:
bool bom;
bool nextValid;
wchar_t nextCh;
byte read();
byte peek();
wchar_t readChar();
wchar_t encodeUtf16(nat utf32);
nat readChar(byte first, nat numToRead);
nat decodeUtf8();
};
class Utf16Reader : public TextReader {
public:
Utf16Reader(Stream *stream, bool reverseEndian);
virtual ~Utf16Reader();
virtual textfile::Format format() { return (reverseEndian ? textfile::utf16rev : textfile::utf16); };
virtual wchar_t get();
private:
bool reverseEndian;
};
}
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