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100 lines
2.3 KiB
100 lines
2.3 KiB
#ifndef _SKIP_H
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#define _SKIP_H
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/*-------------------------------------------------------------------------
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| Purpose: These are the routines which interpret the low-level |
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| compressed data structures. |
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| Args: [qw, ql]: Pointer to storage for value of structure. |
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| Returns: Pointer to first byte after the structure. |
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-------------------------------------------------------------------------*/
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#define GETLONG(p) (*((DWORD *)p))
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#define GETWORD(p) (*((WORD *)p))
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#ifdef _X86_
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#define QVSkipQGA(qga, qw) (*((PBYTE)qga) & 1 ? \
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(void*) (*qw = *((WORD *)qga) >> 1, (((WORD *)qga) + 1)) \
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: (void*) (*qw = *((PBYTE)qga) >> 1, (((PBYTE)qga) + 1)))
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#define QVSkipQGB(qgb, ql) (*((PBYTE) qgb) & 1 ? \
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(void*) (*ql = *((DWORD *)qgb) >> 1, (((DWORD *)qgb) + 1)) \
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: (void*) (*ql = *((WORD *)qgb) >> 1, (((WORD *)qgb) + 1)))
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#else
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QV QVSkipQGA(QV,QW);
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QV QVSkipQGB(QV,QL);
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#endif // _X86_
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// REVIEW: GP fault?
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//#define QVSkipQGC(qgc, ql) (*ql = *((int *)qgc) & 0x00FFFFFFL, \ // REVIEW LYNN not used anymore?
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// (void*) (((PBYTE) qgc) + 3))
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/***************************************************************************
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FUNCTION: QVSkipQGD
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PURPOSE: Retrieve a SHORT packed value
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PARAMETERS:
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qge
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ql
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RETURNS:
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COMMENTS:
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MODIFICATION DATES:
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09-Jul-1994 [ralphw]
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***************************************************************************/
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__inline void* STDCALL QVSkipQGD(LPBYTE qge, INT16* ql) {
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if (*qge & 0x01) {
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UNALIGNED WORD * pd = (WORD *) qge;
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*ql = (*pd++ >> 1) - 0x4000;
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return (void*) pd;
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}
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else {
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*ql = (*qge++ >> 1) - 0x40;
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return (void*) qge;
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}
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};
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/***************************************************************************
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FUNCTION: QVSkipQGE
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PURPOSE: Retrieve a LONG packed value
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PARAMETERS:
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qge
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ql
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RETURNS:
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COMMENTS:
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MODIFICATION DATES:
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09-Jul-1994 [ralphw]
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***************************************************************************/
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__inline void* STDCALL QVSkipQGE(LPBYTE qge, LONG* ql) {
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if (*qge & 0x01) {
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DWORD * pd = (DWORD *) qge;
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*ql = (*pd++ >> 1) - 0x40000000L;
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return (void*) pd;
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}
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else {
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UNALIGNED WORD * pd = (WORD *) qge;
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*ql = (*pd++ >> 1) - 0x4000;
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return (void*) pd;
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}
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};
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#define QVSkipQGF(qgf, ql) (*ql = (*((int *)qgf) & 0x00FFFFFFL) - 0x400000L, \
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(void*) (((PBYTE)qgf) + 3))
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#endif // _SKIP_H
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