66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
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/* $Header$ */
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/*
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* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
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*
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* This product is part of the Amsterdam Compiler Kit.
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*
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* Permission to use, sell, duplicate or disclose this software must be
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* obtained in writing. Requests for such permissions may be sent to
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*
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* Dr. Andrew S. Tanenbaum
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* Wiskundig Seminarium
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* Vrije Universiteit
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* Postbox 7161
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* 1007 MC Amsterdam
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* The Netherlands
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*
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*/
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/* Author: J.W. Stevenson */
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#include <pc_err.h>
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extern _trp();
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#define assert(x) /* nothing */
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#ifndef EM_WSIZE
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#define EM_WSIZE _EM_WSIZE
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#endif
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struct descr {
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int low;
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int diff;
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int size;
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};
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_unp(ad,zd,i,ap,zp,noext) int i; struct descr *ad,*zd; char *ap,*zp; int noext; {
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if (zd->diff > ad->diff ||
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(i -= ad->low) < 0 ||
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(i+zd->diff) > ad->diff)
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_trp(EUNPACK);
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ap += (i * ad->size);
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i = (zd->diff + 1) * zd->size;
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if (zd->size == 1) {
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int *aptmp = (int *) ap;
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assert(ad->size == EM_WSIZE);
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while (--i >= 0)
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if (noext) *aptmp++ = *zp++ & 0377;
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else *aptmp++ = *zp++;
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#if EM_WSIZE > 2
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} else if (zd->size == 2) {
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int *aptmp = (int *) ap;
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short *zptmp = (short *) zp;
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assert(ad->size == EM_WSIZE);
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while (--i >= 0)
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if (noext) *aptmp++ = *zptmp++ & 0177777;
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else *aptmp++ = *zptmp++;
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#endif
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} else {
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assert(ad->size == zd->size);
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while (--i >= 0)
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*ap++ = *zp++;
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}
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}
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