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-rw-r--r--readline-4.3/examples/readlinebuf.h139
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diff --git a/readline-4.3/examples/readlinebuf.h b/readline-4.3/examples/readlinebuf.h
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-/*******************************************************************************
- * $Revision$
- * $Date$
- * $Author$
- *
- * 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