Files
json-c/bits.h
Michael Clark 7b899b6dc5 * fix pointer arithmetic bug for error pointer check in is_error() macro
* fix type passed to printbuf_memappend in json_tokener
  * update autotools bootstrap instructions in README
    Michael Clark <michael@metaparadigm.com>


git-svn-id: http://svn.metaparadigm.com/svn/json-c/trunk@6 327403b1-1117-474d-bef2-5cb71233fd97
2007-03-13 08:26:21 +00:00

58 lines
1.6 KiB
C

/*
* $Id: bits.h,v 1.7 2005/07/15 02:40:44 mclark Exp $
*
* Copyright Metaparadigm Pte. Ltd. 2004.
* Michael Clark <michael@metaparadigm.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public (LGPL)
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details: http://www.gnu.org/
*
*/
#ifndef _bits_h_
#define _bits_h_
#include "config.h"
#if STDC_HEADERS
# include <stddef.h>
#endif /* STDC_HEADERS */
/* CAW: wrapped in ifndef's to make win32 compliant
** this fails to take over GCC specifics, but this
** seems to be unimportant.
*/
#ifndef min
#define min(x,y) ({ \
typeof(x) _x = (x); \
typeof(y) _y = (y); \
(void) (&_x == &_y); \
_x < _y ? _x : _y; })
#endif
#ifndef max
#define max(x,y) ({ \
typeof(x) _x = (x); \
typeof(y) _y = (y); \
(void) (&_x == &_y); \
_x > _y ? _x : _y; })
#endif
#define hexdigit(x) (((x) <= '9') ? (x) - '0' : ((x) & 7) + 9)
#define error_ptr(error) ((void*)error)
#ifdef _MSC_VER
#define is_error(ptr) ((UINT_PTR)ptr > (UINT_PTR)-4000L)
#else
#define is_error(ptr) ((unsigned long)ptr > (unsigned long)-4000L)
#endif
#endif