48 lines
1.8 KiB
C
48 lines
1.8 KiB
C
/*
|
|
* Boa, an http server
|
|
* Copyright (C) 1995 Paul Phillips <paulp@go2net.com>
|
|
* Copyright (C) 2001 Jon Nelson <jnelson@boa.org>
|
|
* Copyright (C) 2001 Larry Doolittle <ldoolitt@boa.org>
|
|
|
|
* 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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
/* $Id: escape.h,v 1.18 2002/01/31 03:12:21 jnelson Exp $ */
|
|
|
|
#include "config.h"
|
|
|
|
/* Highest character number that can possibly be passed through un-escaped */
|
|
#define NEEDS_ESCAPE_BITS 128
|
|
|
|
#ifndef NEEDS_ESCAPE_SHIFT
|
|
#define NEEDS_ESCAPE_SHIFT 5 /* 1 << 5 is 32 bits */
|
|
#endif
|
|
|
|
#define NEEDS_ESCAPE_WORD_LENGTH (1<<NEEDS_ESCAPE_SHIFT)
|
|
|
|
#define NEEDS_ESCAPE_INDEX(c) ((c)>>NEEDS_ESCAPE_SHIFT)
|
|
|
|
/* Assume variable shift is fast, otherwise this could be a table lookup */
|
|
#define NEEDS_ESCAPE_MASK(c) (1<<((c)&(NEEDS_ESCAPE_WORD_LENGTH - 1)))
|
|
|
|
/* Newer compilers could use an inline function.
|
|
* This macro works great, as long as you pass unsigned int or unsigned char.
|
|
*/
|
|
#define needs_escape(c) ((c)>=NEEDS_ESCAPE_BITS || _needs_escape[NEEDS_ESCAPE_INDEX(c)]&NEEDS_ESCAPE_MASK(c))
|
|
|
|
extern unsigned long _needs_escape[(NEEDS_ESCAPE_BITS+NEEDS_ESCAPE_WORD_LENGTH-1)/NEEDS_ESCAPE_WORD_LENGTH];
|
|
void build_needs_escape(void);
|