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/* |
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* Boa, an http server |
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* Copyright (C) 1995 Paul Phillips <paulp@go2net.com> |
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* Copyright (C) 2001 Jon Nelson <jnelson@boa.org> |
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* Copyright (C) 2001 Larry Doolittle <ldoolitt@boa.org> |
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|
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 1, or (at your option) |
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* any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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*/ |
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|
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/* $Id: escape.h,v 1.18 2002/01/31 03:12:21 jnelson Exp $ */ |
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|
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#include "config.h" |
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|
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/* Highest character number that can possibly be passed through un-escaped */ |
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#define NEEDS_ESCAPE_BITS 128 |
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|
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#ifndef NEEDS_ESCAPE_SHIFT |
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#define NEEDS_ESCAPE_SHIFT 5 /* 1 << 5 is 32 bits */ |
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#endif |
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|
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#define NEEDS_ESCAPE_WORD_LENGTH (1<<NEEDS_ESCAPE_SHIFT) |
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|
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#define NEEDS_ESCAPE_INDEX(c) ((c)>>NEEDS_ESCAPE_SHIFT) |
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|
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/* Assume variable shift is fast, otherwise this could be a table lookup */ |
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#define NEEDS_ESCAPE_MASK(c) (1<<((c)&(NEEDS_ESCAPE_WORD_LENGTH - 1))) |
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|
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/* Newer compilers could use an inline function. |
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* This macro works great, as long as you pass unsigned int or unsigned char. |
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*/ |
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#define needs_escape(c) ((c)>=NEEDS_ESCAPE_BITS || _needs_escape[NEEDS_ESCAPE_INDEX(c)]&NEEDS_ESCAPE_MASK(c)) |
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|
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extern unsigned long _needs_escape[(NEEDS_ESCAPE_BITS+NEEDS_ESCAPE_WORD_LENGTH-1)/NEEDS_ESCAPE_WORD_LENGTH]; |
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void build_needs_escape(void); |