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/*
* Copyright 2003 Adrian Thurston <thurston@complang.org>
*/
/* This file is part of Ragel.
*
* Ragel 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.
*
* Ragel 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 Ragel; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _BUFFER_H
#define _BUFFER_H
#define BUFFER_INITIAL_SIZE 4096
/* An automatically grown buffer for collecting tokens. Always reuses space;
* never down resizes. */
struct Buffer
{
Buffer()
{
data = (char*) malloc( BUFFER_INITIAL_SIZE );
allocated = BUFFER_INITIAL_SIZE;
length = 0;
}
~Buffer() { free(data); }
void append( char p )
{
if ( length == allocated ) {
allocated *= 2;
data = (char*) realloc( data, allocated );
}
data[length++] = p;
}
void clear() { length = 0; }
char *data;
int allocated;
int length;
};
#endif
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