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/****************************************************************************
* Copyright (C) from 2009 to Present EPAM Systems.
*
* This file is part of Indigo toolkit.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
***************************************************************************/
#ifndef __scanner_h__
#define __scanner_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"
#include <stdio.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(long long pos, int from) = 0;
virtual long long length() = 0;
virtual long long 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(long long pos, int from);
virtual long long length();
virtual long long tell();
virtual char readChar();
private:
FILE* _file;
long long _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(long long pos, int from);
virtual long long length();
virtual long long 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&);
};
} // namespace indigo
#endif
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