ACIL FM

Nama	Ukuran	Aksi
rlfe	-	Open
CHANGES	74.58 MB	View DL Edit
excallback.c	5.67 MB	View DL Edit
fileman.c	11.38 MB	View DL Edit
histexamp.c	2.86 MB	View DL Edit
hist_erasedups.c	2.67 MB	View DL Edit
hist_purgecmd.c	3.29 MB	View DL Edit
manexamp.c	3.22 MB	View DL Edit
NEWS	18.27 MB	View DL Edit
readlinebuf.h	3.36 MB	View DL Edit
README	7.84 MB	View DL Edit
rl-callbacktest.c	2.49 MB	View DL Edit
rl-fgets.c	10.89 MB	View DL Edit
rl.c	3.12 MB	View DL Edit
rlbasic.c	459 B	View DL Edit
rlcat.c	3.22 MB	View DL Edit
rlevent.c	3.31 MB	View DL Edit
rlkeymaps.c	1.3 MB	View DL Edit
rlptytest.c	6.47 MB	View DL Edit
rltest.c	2.1 MB	View DL Edit
rlversion.c	1.26 MB	View DL Edit

Edit file: /usr/share/doc/readline-devel/readlinebuf.h

/*******************************************************************************
 * $Revision: 1.2 $
 * $Date: 2001/09/11 06:19:36 $
 * $Author: vyzo $
 *
 * Contents: A streambuf which uses the GNU readline library for line I/O
 * (c) 2001 by Dimitris Vyzovitis [vyzo@media.mit.edu]
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2  of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 ******************************************************************************/

#ifndef _READLINEBUF_H_
#define _READLINEBUF_H_

#include <iostream>
#include <cstring>
#include <cassert>
#include <cstdlib>
#include <cstdio>

#include <readline/readline.h>
#include <readline/history.h>

#if (defined __GNUC__) && (__GNUC__ < 3)
#include <streambuf.h>
#else
#include <streambuf>
using std::streamsize;
using std::streambuf;
#endif

class readlinebuf : public streambuf {
public:
#if (defined __GNUC__) && (__GNUC__ < 3)
	typedef char char_type;
	typedef int int_type;
	typedef streampos pos_type;
	typedef streamoff off_type;
#endif
	static const int_type eof = EOF; // this is -1
	static const int_type not_eof = 0;

private:
	const char* prompt_;
	bool history_;
	char* line_;
	int low_;
	int high_;

protected:
		
	virtual int_type showmanyc() const { return high_ - low_; }
		
	virtual streamsize xsgetn( char_type* buf, streamsize n ) {
		int rd = n > (high_ - low_)? (high_ - low_) : n;
		memcpy( buf, line_, rd );
		low_ += rd;
			
		if ( rd < n ) {
			low_ = high_ = 0;
			free( line_ ); // free( NULL ) is a noop
			line_ = readline( prompt_ );
			if ( line_ ) {
				high_ = strlen( line_ );
				if ( history_ && high_ ) add_history( line_ );
				rd += xsgetn( buf + rd, n - rd );
			}
		}
			
		return rd; 
	}
		
	virtual int_type underflow() {
		if ( high_ == low_ ) {
			low_ = high_ = 0;
			free( line_ ); // free( NULL ) is a noop
			line_ = readline( prompt_ );
			if ( line_ ) {
				high_ = strlen( line_ );
				if ( history_ && high_ ) add_history( line_ );
			}
		}
			
		if ( low_ < high_ ) return line_[low_];
		else return eof;
	}
		
	virtual int_type uflow() {
		int_type c = underflow();
		if ( c != eof ) ++low_;
		return c;
	}
		
	virtual int_type pbackfail( int_type c = eof ) {
		if ( low_ > 0 )	--low_;
		else if ( c != eof ) {
			if ( high_ > 0 ) {
				char* nl = (char*)realloc( line_, high_ + 1 );
				if ( nl ) {
					line_ = (char*)memcpy( nl + 1, line_, high_ );
					high_ += 1;
					line_[0] = char( c );
				} else return eof;
			} else {
				assert( !line_ );
				line_ = (char*)malloc( sizeof( char ) );
				*line_ = char( c );
				high_ = 1;
			}
		} else return eof;

return not_eof;
	}
 		
public:
	readlinebuf( const char* prompt = NULL, bool history = true ) 
		: prompt_( prompt ), history_( history ),
		  line_( NULL ), low_( 0 ), high_( 0 ) {
		setbuf( 0, 0 );
	}
		
		
};

#endif

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