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#ifndef XADMASTER_HOOK_DISKARC_C
#define XADMASTER_HOOK_DISKARC_C
/* $Id: hook_diskarc.c,v 1.8 2005/06/23 14:54:37 stoecker Exp $
diskarc input file IO hook
XAD library system for archive handling
Copyright (C) 1998 and later by Dirk Stcker <soft@dstoecker.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef AMIGA
#include <proto/xadmaster.h>
#include <proto/utility.h>
#endif
#include "include/functions.h"
#include "include/SDI_compiler.h"
/************************************************************************
* *
* InHookDiskArc private structure *
* *
************************************************************************/
struct DiskArcPrivate
{
struct xadArchiveInfo *ai;
struct xadDiskInfo *di;
xadSize insize;
xadUINT8 *buffer;
};
/********************** read-from-diskarc hook **************************/
FUNCHOOK(InHookDiskArc)
{
struct xadMasterBaseP * xadMasterBase;
struct DiskArcPrivate *dap;
xadERROR err = 0;
xadMasterBase = ai->xaip_MasterBase;
dap = (struct DiskArcPrivate *) param->xhp_PrivatePtr;
switch(param->xhp_Command)
{
case XADHC_READ:
if(param->xhp_DataPos + param->xhp_BufferSize > dap->insize)
err = XADERR_INPUT;
else if(!dap->buffer)
{
if(!(dap->buffer = (xadUINT8 *) xadAllocVec(XADM dap->insize,
XADMEMF_PUBLIC)))
{
err = XADERR_NOMEMORY;
}
else
{
err = xadDiskUnArc(XADM_PRIV XADM_AI(dap->ai), XAD_OUTSIZE,
dap->insize, XAD_OUTMEMORY, dap->buffer, XAD_ENTRYNUMBER,
dap->di->xdi_EntryNumber, TAG_DONE);
}
}
if(!err)
{
#ifdef DEBUG
DebugOther("InHookDiskArc: read %ld bytes from %ld",
param->xhp_BufferSize, param->xhp_DataPos);
#endif
xadCopyMem(XADM dap->buffer + param->xhp_DataPos, param->xhp_BufferPtr, param->xhp_BufferSize);
param->xhp_DataPos += param->xhp_BufferSize;
}
break;
case XADHC_SEEK:
if(param->xhp_DataPos + param->xhp_CommandData > dap->insize)
return XADERR_INPUT;
#ifdef DEBUG
DebugOther("InHookDiskArc: XADHC_SEEK, %ld from %ld", param->xhp_CommandData, param->xhp_DataPos);
#endif
param->xhp_DataPos += param->xhp_CommandData;
break;
case XADHC_FULLSIZE:
param->xhp_CommandData = dap->insize;
break;
case XADHC_INIT:
#ifdef DEBUG
DebugOther("InHookDiskArc: XADHC_INIT");
#endif
if((dap = xadAllocVec(XADM sizeof(struct DiskArcPrivate), XADMEMF_PUBLIC|XADMEMF_CLEAR)))
{
param->xhp_PrivatePtr = dap;
if((dap->ai = (struct xadArchiveInfo *) xadAllocObject(XADM XADOBJ_ARCHIVEINFO, 0)))
{
if(!(err = xadGetInfoA(XADM XADM_AI(dap->ai), ai->xaip_InDiskArc)))
{
xadTAGPTR ti;
xadUINT32 i = 0;
struct xadDiskInfo *di;
#ifdef AMIGA
struct UtilityBase *UtilityBase;
UtilityBase = xadMasterBase->xmb_UtilityBase;
#endif
if((ti = FindTagItem(XAD_ENTRYNUMBER, ai->xaip_InDiskArc)))
i = ti->ti_Data;
if(!(di = dap->ai->xai_DiskInfo))
err = XADERR_ILLEGALDATA;
else
{
while(di && di->xdi_EntryNumber < i)
di = di->xdi_Next;
if(!di)
err = XADERR_BADPARAMS;
else
{
dap->di = di;
dap->insize = di->xdi_TotalSectors;
if(!(di->xdi_Flags & (XADDIF_NOCYLINDERS|XADDIF_NOCYLSECTORS)))
dap->insize = (di->xdi_HighCyl-di->xdi_LowCyl+1)*di->xdi_CylSectors;
dap->insize *= di->xdi_SectorSize;
}
}
}
}
else
err = XADERR_NOMEMORY;
}
else
err = XADERR_NOMEMORY;
break;
case XADHC_FREE:
if(dap)
{
if(dap->buffer)
xadFreeObjectA(XADM dap->buffer, 0);
if(dap->ai)
{
xadFreeInfo(XADM_PRIV XADM_AI(dap->ai));
xadFreeObjectA(XADM_PRIV XADM_AI(dap->ai), 0);
}
xadFreeObjectA(XADM_PRIV dap, 0);
param->xhp_PrivatePtr = 0;
}
case XADHC_ABORT: /* use break of XADHC_FREE */
break;
case XADHC_IMAGEINFO:
{
struct xadImageInfo *ii;
ii = (struct xadImageInfo *)(uintptr_t) param->xhp_CommandData;
ii->xii_SectorSize = dap->di->xdi_SectorSize;
ii->xii_TotalSectors = dap->di->xdi_TotalSectors;
if(dap->di->xdi_Flags & (XADDIF_NOCYLINDERS|XADDIF_NOCYLSECTORS))
{
ii->xii_NumSectors = dap->di->xdi_TotalSectors;
ii->xii_FirstSector = 0;
}
else
{
ii->xii_NumSectors = (dap->di->xdi_HighCyl-dap->di->xdi_LowCyl+1)*dap->di->xdi_CylSectors;
ii->xii_FirstSector = dap->di->xdi_LowCyl*dap->di->xdi_CylSectors;
}
}
break;
default: err = XADERR_NOTSUPPORTED;
}
#ifdef DEBUG
if(err)
DebugError("InHookDiskArc returns \"%s\" (%ld)", xadGetErrorText(XADM err), err);
#endif
return err;
}
ENDFUNC
#endif /* XADMASTER_HOOK_DISKARC_C */
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