XMP_Uns32 TagTree::digest32u(LFA_FileRef file,const std::string key /* ="" */, bool BigEndian /*=false*/,bool hexDisplay /*=false*/ )
{
XMP_Uns32 r;
if (4 != LFA_Read ( file, &r, 4, false)) // require all == false => leave the throwing to this routine
Log::error("could not read 4-byte value from file (end of file?)");
if ( ((kBigEndianHost==1) && !BigEndian ) || ((kBigEndianHost==0) && BigEndian )) // "XOR"
Flip4(&r);
if (!key.empty()) {
char out[19]; //longest unsigned int is "2147483648", 10 chars resp. 0xFFFFFFFF 10 chars
if (!hexDisplay)
snprintf(out,18,"%u",r); //unsigned, mind the trailing \0 on Mac btw
else
snprintf(out,18,"0x%.8X",r); //unsigned, mind the trailing \0 on Mac btw
setKeyValue(key,out);
}
return r;
}
XMP_Uns32 TIFF_MemoryReader::ProcessOneIFD ( XMP_Uns32 ifdOffset, XMP_Uns8 ifd )
{
TweakedIFDInfo& ifdInfo = this->containedIFDs[ifd];
if ( (ifdOffset < 8) || (ifdOffset > (this->tiffLength - kEmptyIFDLength)) ) {
XMP_Error error(kXMPErr_BadTIFF, "Bad IFD offset" );
this->NotifyClient ( kXMPErrSev_FileFatal, error );
}
XMP_Uns8* ifdPtr = this->tiffStream + ifdOffset;
XMP_Uns16 ifdCount = this->GetUns16 ( ifdPtr );
TweakedIFDEntry* ifdEntries = (TweakedIFDEntry*)(ifdPtr+2);
if ( ifdCount >= 0x8000 ) {
XMP_Error error(kXMPErr_BadTIFF, "Outrageous IFD count" );
this->NotifyClient ( kXMPErrSev_FileFatal, error );
}
if ( (XMP_Uns32)(2 + ifdCount*12 + 4) > (this->tiffLength - ifdOffset) ) {
XMP_Error error(kXMPErr_BadTIFF, "Out of bounds IFD" );
this->NotifyClient ( kXMPErrSev_FileFatal, error );
}
ifdInfo.count = ifdCount;
ifdInfo.entries = ifdEntries;
XMP_Int32 prevTag = -1; // ! The GPS IFD has a tag 0, so we need a signed initial value.
bool needsSorting = false;
for ( size_t i = 0; i < ifdCount; ++i ) {
TweakedIFDEntry* thisEntry = &ifdEntries[i]; // Tweak the IFD entry to be more useful.
if ( ! this->nativeEndian ) {
Flip2 ( &thisEntry->id );
Flip2 ( &thisEntry->type );
Flip4 ( &thisEntry->bytes );
}
if ( GetUns16AsIs(&thisEntry->id) <= prevTag ) needsSorting = true;
prevTag = GetUns16AsIs ( &thisEntry->id );
if ( (GetUns16AsIs(&thisEntry->type) < kTIFF_ByteType) || (GetUns16AsIs(&thisEntry->type) > kTIFF_LastType) ) continue; // Bad type, skip this tag.
#if ! SUNOS_SPARC
thisEntry->bytes *= (XMP_Uns32)kTIFF_TypeSizes[thisEntry->type];
if ( thisEntry->bytes > 4 ) {
if ( ! this->nativeEndian ) Flip4 ( &thisEntry->dataOrPos );
if ( (thisEntry->dataOrPos < 8) || (thisEntry->dataOrPos >= this->tiffLength) ) {
thisEntry->bytes = thisEntry->dataOrPos = 0; // Make this bad tag look empty.
}
if ( thisEntry->bytes > (this->tiffLength - thisEntry->dataOrPos) ) {
thisEntry->bytes = thisEntry->dataOrPos = 0; // Make this bad tag look empty.
}
}
#else
void *tempEntryByte = &thisEntry->bytes;
XMP_Uns32 temp = GetUns32AsIs(&thisEntry->bytes);
temp = temp * (XMP_Uns32)kTIFF_TypeSizes[GetUns16AsIs(&thisEntry->type)];
memcpy ( tempEntryByte, &temp, sizeof(thisEntry->bytes) );
// thisEntry->bytes *= (XMP_Uns32)kTIFF_TypeSizes[thisEntry->type];
if ( GetUns32AsIs(&thisEntry->bytes) > 4 ) {
void *tempEntryDataOrPos = &thisEntry->dataOrPos;
if ( ! this->nativeEndian ) Flip4 ( &thisEntry->dataOrPos );
if ( (GetUns32AsIs(&thisEntry->dataOrPos) < 8) || (GetUns32AsIs(&thisEntry->dataOrPos) >= this->tiffLength) ) {
// thisEntry->bytes = thisEntry->dataOrPos = 0; // Make this bad tag look empty.
memset ( tempEntryByte, 0, sizeof(XMP_Uns32) );
memset ( tempEntryDataOrPos, 0, sizeof(XMP_Uns32) );
}
if ( GetUns32AsIs(&thisEntry->bytes) > (this->tiffLength - GetUns32AsIs(&thisEntry->dataOrPos)) ) {
// thisEntry->bytes = thisEntry->dataOrPos = 0; // Make this bad tag look empty.
memset ( tempEntryByte, 0, sizeof(XMP_Uns32) );
memset ( tempEntryDataOrPos, 0, sizeof(XMP_Uns32) );
}
}
#endif
}
ifdPtr += (2 + ifdCount*12);
XMP_Uns32 nextIFDOffset = this->GetUns32 ( ifdPtr );
if ( needsSorting ) SortIFD ( &ifdInfo ); // ! Don't perturb the ifdCount used to find the next IFD offset.
return nextIFDOffset;
} // TIFF_MemoryReader::ProcessOneIFD
