mxutil.c

开放源码的编译器open watcom 1.6.0版的源代码

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
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*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include "trpimp.h"

unsigned_8      In_Mx_Num;
unsigned_8      Out_Mx_Num;
mx_entry        TRAPFAR *In_Mx_Ptr;
mx_entry        TRAPFAR *Out_Mx_Ptr;

void *GetInPtr( unsigned pos )  /* Absolute position */
{
    unsigned_8          entries_left;
    mx_entry            TRAPFAR *entry;

    entries_left = In_Mx_Num - 1;
    entry = In_Mx_Ptr;
    for( ;; ) {
        if( entries_left == 0 || pos < entry->len ) break;
        pos -= entry->len;
        ++entry;
        --entries_left;
    }
    return( (unsigned_8 *)entry->ptr + pos );
}

void *GetOutPtr( unsigned pos )  /* Absolute position */
{
    unsigned_8          entries_left;
    mx_entry            TRAPFAR *entry;

    entries_left = Out_Mx_Num - 1;
    entry = Out_Mx_Ptr;
    for( ;; ) {
        if( entries_left == 0 || pos < entry->len ) break;
        pos -= entry->len;
        ++entry;
        --entries_left;
    }
    return( (unsigned_8 *)entry->ptr + pos );
}

unsigned GetTotalSize()
{
    unsigned            i;
    unsigned            len = 0;

    for( i = 0; i < In_Mx_Num; i++ ) {
         len += In_Mx_Ptr[i].len;
    }
    return( len );
}