41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/*
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* Copyright 1988 by the Massachusetts Institute of Technology.
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* For copying and distribution information, please see the file
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* <Copyright.MIT>.
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*
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* Comparison macros to emulate LSBFIRST comparison results of network
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* byte-order quantities
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*
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* from: lsb_addr_comp.h,v 4.0 89/01/23 15:44:46 jtkohl Exp $
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* $Id: lsb_addr_comp.h,v 1.2 1994/07/19 19:23:21 g89r4222 Exp $
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*/
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#ifndef LSB_ADDR_COMP_DEFS
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#define LSB_ADDR_COMP_DEFS
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#include "osconf.h"
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#ifdef LSBFIRST
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#define lsb_net_ulong_less(x,y) ((x < y) ? -1 : ((x > y) ? 1 : 0))
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#define lsb_net_ushort_less(x,y) ((x < y) ? -1 : ((x > y) ? 1 : 0))
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#else
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/* MSBFIRST */
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#define u_char_comp(x,y) \
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(((x)>(y))?(1):(((x)==(y))?(0):(-1)))
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/* This is gross, but... */
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#define lsb_net_ulong_less(x, y) long_less_than((u_char *)&x, (u_char *)&y)
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#define lsb_net_ushort_less(x, y) short_less_than((u_char *)&x, (u_char *)&y)
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#define long_less_than(x,y) \
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(u_char_comp((x)[3],(y)[3])?u_char_comp((x)[3],(y)[3]): \
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(u_char_comp((x)[2],(y)[2])?u_char_comp((x)[2],(y)[2]): \
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(u_char_comp((x)[1],(y)[1])?u_char_comp((x)[1],(y)[1]): \
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(u_char_comp((x)[0],(y)[0])))))
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#define short_less_than(x,y) \
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(u_char_comp((x)[1],(y)[1])?u_char_comp((x)[1],(y)[1]): \
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(u_char_comp((x)[0],(y)[0])))
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#endif /* LSBFIRST */
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#endif /* LSB_ADDR_COMP_DEFS */
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