intdef.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 72 行

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*
*                            Open Watcom Project
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*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*    This file contains Original Code and/or Modifications of Original
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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/* order ints from host into 8086 format*/
unsigned short TargetInt( short int value )
  {
   union  { char b(:2:);
             short val;
           }in,out;
    in.val = value;
    out.b(:0:) = in.b(:1:);
    out.b(:1:) = in.b(:0:);
    return( out.val );
  }
int TargetOffset( int  value )
  {
    return( value );
  }
int TargetBigInt( int value )
  {
   union  { char b(:4:);
            int val;
           }in,out;
    in.val = value;
    out.b(:0:) = in.b(:3:);
    out.b(:1:) = in.b(:2:);
    out.b(:2:) = in.b(:1:);
    out.b(:3:) = in.b(:0:);
    return( out.val );
  }
int TargAddL( int *targetw, int value )
  {
    int out;
    out = TargetBigInt( *targetw ) + value;
    *targetw = TargetBigInt( out );
  }
int TargAddW( short *targetw, int value )
  {
    short out;
    out = TargetInt( *targetw ) + value;
    *targetw = TargetInt( out );
  }