intcvt.h
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上传日期:2007-01-06
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- /* @(#)intcvt.h 1.1 99/10/18 Copyright 1986 J. Schilling */
- /*
- * Definitions for conversion to/from integer data types of various size.
- *
- * Copyright (c) 1986 J. Schilling
- */
- /*
- * 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 2, 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; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #ifndef _INTCVT_H
- #define _INTCVT_H
- #define i_to_2_byte(a, i) (((Uchar *)(a))[0] = ((i) >> 8) & 0xFF,
- ((Uchar *)(a))[1] = (i) & 0xFF)
- #define i_to_3_byte(a, i) (((Uchar *)(a))[0] = ((i) >> 16)& 0xFF,
- ((Uchar *)(a))[1] = ((i) >> 8) & 0xFF,
- ((Uchar *)(a))[2] = (i) & 0xFF)
- #define i_to_4_byte(a, i) (((Uchar *)(a))[0] = ((i) >> 24)& 0xFF,
- ((Uchar *)(a))[1] = ((i) >> 16)& 0xFF,
- ((Uchar *)(a))[2] = ((i) >> 8) & 0xFF,
- ((Uchar *)(a))[3] = (i) & 0xFF)
- #define a_to_byte(a) (((Int8_t*) a)[0])
- #define a_to_u_byte(a) ((UInt8_t)
- (((Uchar*) a)[0] & 0xFF))
- #define a_to_u_2_byte(a) ((UInt16_t)
- ((((Uchar*) a)[1] & 0xFF) |
- (((Uchar*) a)[0] << 8 & 0xFF00)))
- #define a_to_2_byte(a) (int)(Int16_t)a_to_u_2_byte(a)
- #define a_to_u_3_byte(a) ((Ulong)
- ((((Uchar*) a)[2] & 0xFF) |
- (((Uchar*) a)[1] << 8 & 0xFF00) |
- (((Uchar*) a)[0] << 16 & 0xFF0000)))
- #define a_to_3_byte(a) a_to_u_3_byte(a) /* XXX Is there a signed version ? */
- #ifdef __STDC__
- # define __TOP_4BYTE 0xFF000000UL
- #else
- # define __TOP_4BYTE 0xFF000000
- #endif
- #define a_to_u_4_byte(a) ((Ulong)
- ((((Uchar*) a)[3] & 0xFF) |
- (((Uchar*) a)[2] << 8 & 0xFF00) |
- (((Uchar*) a)[1] << 16 & 0xFF0000) |
- (((Uchar*) a)[0] << 24 & __TOP_4BYTE)))
- #define a_to_4_byte(a) (long)(Int32_t)a_to_u_4_byte(a)
- #define la_to_u_2_byte(a) ((UInt16_t)
- ((((Uchar*) a)[0] & 0xFF) |
- (((Uchar*) a)[1] << 8 & 0xFF00)))
- #define la_to_2_byte(a) (int)(Int16_t)la_to_u_2_byte(a)
- #define la_to_u_3_byte(a) ((Ulong)
- ((((Uchar*) a)[0] & 0xFF) |
- (((Uchar*) a)[1] << 8 & 0xFF00) |
- (((Uchar*) a)[2] << 16 & 0xFF0000)))
- #define la_to_3_byte(a) la_to_u_3_byte(a) /* XXX Is there a signed version ? */
- #define la_to_u_4_byte(a) ((Ulong)
- ((((Uchar*) a)[0] & 0xFF) |
- (((Uchar*) a)[1] << 8 & 0xFF00) |
- (((Uchar*) a)[2] << 16 & 0xFF0000) |
- (((Uchar*) a)[3] << 24 & __TOP_4BYTE)))
- #define la_to_4_byte(a) (long)(Int32_t)la_to_u_4_byte(a)
- #endif /* _INTCVT_H */