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/****************************************************************************
* Copyright (C) 2009-2015 EPAM Systems
*
* This file is part of Indigo toolkit.
*
* This file may be distributed and/or modified under the terms of the
* GNU General Public License version 3 as published by the Free Software
* Foundation and appearing in the file LICENSE.GPL included in the
* packaging of this file.
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
***************************************************************************/
#ifndef __scanner_h__
#define __scanner_h__
#include <stdio.h>
#include "base_cpp/array.h"
#include "base_cpp/io_base.h"
#include "base_cpp/obj_array.h"
#include "base_cpp/reusable_obj_array.h"
namespace indigo {
class DLLEXPORT Scanner
{
public:
DECL_ERROR;
virtual ~Scanner ();
virtual void read (int length, void *res) = 0;
virtual void skip (int n) = 0;
virtual bool isEOF () = 0;
virtual int lookNext () = 0;
virtual void seek (int pos, int from) = 0;
virtual int length () = 0;
virtual int tell () = 0;
virtual byte readByte ();
virtual void readAll (Array<char> &arr);
void read (int length, Array<char> &buf);
void readLine (Array<char> &out, bool append_zero);
void appendLine (Array<char> &out, bool append_zero);
bool skipLine ();
virtual char readChar ();
word readBinaryWord ();
int readBinaryInt ();
dword readBinaryDword ();
float readBinaryFloat ();
short readPackedShort ();
unsigned int readPackedUInt ();
void readCharsFix (int n, char *chars_out);
float readFloatFix (int digits);
int readIntFix (int digits);
void skipSpace ();
void skipUntil (const char *delimiters);
float readFloat (void);
bool tryReadFloat (float &value);
int readInt (void);
int readInt1 (void);
int readUnsigned ();
// when delimiters = 0, any isspace() character is considered delimiter
void readWord (Array<char> &word, const char *delimiters);
bool findWord (const char *word);
int findWord (ReusableObjArray< Array<char> > &words);
bool findWordIgnoreCase (const char *word);
int findWordIgnoreCase (ReusableObjArray< Array<char> > &words);
static bool isSingleLine (Scanner &scanner);
protected:
bool _readDouble (double &res, int max);
void _prefixFunction (Array<char> &str, Array<int> &prefix);
};
class DLLEXPORT FileScanner : public Scanner
{
public:
FileScanner (Encoding filename_encoding, const char *filename);
explicit FileScanner (const char *format, ...);
virtual ~FileScanner ();
virtual void read (int length, void *res);
virtual bool isEOF ();
virtual void skip (int n);
virtual int lookNext ();
virtual void seek (int pos, int from);
virtual int length ();
virtual int tell ();
virtual char readChar ();
private:
FILE *_file;
int _file_len;
unsigned char _cache[1024];
int _cache_pos, _max_cache;
void _validateCache ();
void _invalidateCache ();
void _init (Encoding filename_encoding, const char *filename);
// no implicit copy
FileScanner (const FileScanner &);
};
class DLLEXPORT BufferScanner : public Scanner
{
public:
explicit BufferScanner (const char *buffer, int buffer_size);
explicit BufferScanner (const byte *buffer, int buffer_size);
explicit BufferScanner (const char *str);
explicit BufferScanner (const Array<char> &arr);
virtual ~BufferScanner ();
virtual bool isEOF ();
virtual void read (int length, void *res);
virtual void skip (int n);
virtual int lookNext ();
virtual void seek (int pos, int from);
virtual int length ();
virtual int tell ();
virtual byte readByte ();
const void * curptr ();
private:
const char *_buffer;
int _size;
int _offset;
void _init (const char *buffer, int length);
// no implicit copy
BufferScanner (const BufferScanner &);
};
}
#endif
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