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Diffstat (limited to 'common/buffer.h')
| -rw-r--r-- | common/buffer.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/common/buffer.h b/common/buffer.h new file mode 100644 index 0000000..99c4e82 --- /dev/null +++ b/common/buffer.h @@ -0,0 +1,55 @@ +/* + * Copyright 2003 Adrian Thurston <thurston@cs.queensu.ca> + */ + +/* 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 /* _BUFFER_H */ |