tif_aux.c File Reference

#include <precomp.h>
#include "tif_predict.h"
#include <math.h>
#include <float.h>

Include dependency graph for tif_aux.c:

Go to the source code of this file.

Classes
struct	_Int64Parts
union	_Int64

Functions
uint32	_TIFFMultiply32 (TIFF *tif, uint32 first, uint32 second, const char *where)
uint64	_TIFFMultiply64 (TIFF *tif, uint64 first, uint64 second, const char *where)
tmsize_t	_TIFFMultiplySSize (TIFF *tif, tmsize_t first, tmsize_t second, const char *where)
tmsize_t	_TIFFCastUInt64ToSSize (TIFF *tif, uint64 val, const char *module)
void *	_TIFFCheckRealloc (TIFF *tif, void *buffer, tmsize_t nmemb, tmsize_t elem_size, const char *what)
void *	_TIFFCheckMalloc (TIFF *tif, tmsize_t nmemb, tmsize_t elem_size, const char *what)
static int	TIFFDefaultTransferFunction (TIFFDirectory *td)
static int	TIFFDefaultRefBlackWhite (TIFFDirectory *td)
int	TIFFVGetFieldDefaulted (TIFF *tif, uint32 tag, va_list ap)
int	TIFFGetFieldDefaulted (TIFF *tif, uint32 tag,...)
float	_TIFFUInt64ToFloat (uint64 ui64)
double	_TIFFUInt64ToDouble (uint64 ui64)
float	_TIFFClampDoubleToFloat (double val)
int	_TIFFSeekOK (TIFF *tif, toff_t off)

Function Documentation

_TIFFCastUInt64ToSSize()

tmsize_t _TIFFCastUInt64ToSSize	(	TIFF *	tif,
		uint64	val,
		const char *	module
	)

Definition at line 83 of file tif_aux.c.

{
    if( val > (uint64)TIFF_TMSIZE_T_MAX )
    {
        if( tif != NULL && module != NULL )
        {
            TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
        }
        return 0;
    }
    return (tmsize_t)val;
}

Referenced by TIFFRasterScanlineSize(), TIFFReadRawStrip(), TIFFReadRawTile(), TIFFScanlineSize(), TIFFStripSize(), TIFFTileRowSize(), TIFFTileSize(), TIFFVStripSize(), and TIFFVTileSize().

_TIFFCheckMalloc()

void * _TIFFCheckMalloc	(	TIFF *	tif,
		tmsize_t	nmemb,
		tmsize_t	elem_size,
		const char *	what
	)

Definition at line 121 of file tif_aux.c.

{
    return _TIFFCheckRealloc(tif, NULL, nmemb, elem_size, what);  
}

Referenced by _TIFFMergeFields(), _TIFFRewriteField(), _TIFFVSetField(), allocChoppedUpStripArrays(), EstimateStripByteCounts(), TIFFFetchDirectory(), TIFFFetchStripThing(), TIFFMergeFieldInfo(), TIFFReadDirEntryArrayWithLimit(), and TIFFSetupStrips().

_TIFFCheckRealloc()

void * _TIFFCheckRealloc	(	TIFF *	tif,
		void *	buffer,
		tmsize_t	nmemb,
		tmsize_t	elem_size,
		const char *	what
	)

Definition at line 97 of file tif_aux.c.

{
    void* cp = NULL;
        tmsize_t count = _TIFFMultiplySSize(tif, nmemb, elem_size, NULL);
    /*
     * Check for integer overflow.
     */
    if (count != 0)
    {
        cp = _TIFFrealloc(buffer, count);
    }
 
    if (cp == NULL) {
        TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
                 "Failed to allocate memory for %s "
                 "(%ld elements of %ld bytes each)",
                 what,(long) nmemb, (long) elem_size);
    }
 
    return cp;
}

Referenced by _TIFFCheckMalloc(), _TIFFMergeFields(), TIFFCheckDirOffset(), and TIFFMergeFieldInfo().

_TIFFClampDoubleToFloat()

float _TIFFClampDoubleToFloat

(

double

val

)

Definition at line 397 of file tif_aux.c.

{
    if( val > FLT_MAX )
        return FLT_MAX;
    if( val < -FLT_MAX )
        return -FLT_MAX;
    return (float)val;
}

Referenced by _TIFFVSetField(), and TIFFWriteDirectoryTagSampleformatArray().

_TIFFMultiply32()

uint32 _TIFFMultiply32	(	TIFF *	tif,
		uint32	first,
		uint32	second,
		const char *	where
	)

Definition at line 37 of file tif_aux.c.

{
    if (second && first > TIFF_UINT32_MAX / second) {
        TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
        return 0;
    }
 
    return first * second;
}

Referenced by TIFFNumberOfStrips(), and TIFFNumberOfTiles().

_TIFFMultiply64()

uint64 _TIFFMultiply64	(	TIFF *	tif,
		uint64	first,
		uint64	second,
		const char *	where
	)

Definition at line 48 of file tif_aux.c.

{
    if (second && first > TIFF_UINT64_MAX / second) {
        TIFFErrorExt(tif->tif_clientdata, where, "Integer overflow in %s", where);
        return 0;
    }
 
    return first * second;
}

Referenced by TIFFRasterScanlineSize64(), TIFFScanlineSize64(), TIFFTileRowSize64(), TIFFVStripSize64(), and TIFFVTileSize64().

_TIFFMultiplySSize()

tmsize_t _TIFFMultiplySSize	(	TIFF *	tif,
		tmsize_t	first,
		tmsize_t	second,
		const char *	where
	)

Definition at line 59 of file tif_aux.c.

{
    if( first <= 0 || second <= 0 )
    {
        if( tif != NULL && where != NULL )
        {
            TIFFErrorExt(tif->tif_clientdata, where,
                        "Invalid argument to _TIFFMultiplySSize() in %s", where);
        }
        return 0;
    }
 
    if( first > TIFF_TMSIZE_T_MAX / second )
    {
        if( tif != NULL && where != NULL )
        {
            TIFFErrorExt(tif->tif_clientdata, where,
                        "Integer overflow in %s", where);
        }
        return 0;
    }
    return first * second;
}

Referenced by _TIFFCheckRealloc(), gtStripSeparate(), gtTileSeparate(), and setByteArray().

_TIFFSeekOK()

int _TIFFSeekOK	(	TIFF *	tif,
		toff_t	off
	)

Definition at line 406 of file tif_aux.c.

{
    /* Huge offsets, especially -1 / UINT64_MAX, can cause issues */
    /* See http://bugzilla.maptools.org/show_bug.cgi?id=2726 */
    return off <= (~(uint64)0)/2 && TIFFSeekFile(tif,off,SEEK_SET)==off;
}

_TIFFUInt64ToDouble()

double _TIFFUInt64ToDouble

(

uint64

ui64

)

Definition at line 382 of file tif_aux.c.

{
    _Int64 i;
 
    i.value = ui64;
    if (i.part.high >= 0) {
        return (double)i.value;
    } else {
        long double df;
        df = (long double)i.value;
        df += 18446744073709551616.0; /* adding 2**64 */
        return (double)df;
    }
}

Referenced by TIFFReadDirEntryDouble(), and TIFFReadDirEntryDoubleArray().

_TIFFUInt64ToFloat()

float _TIFFUInt64ToFloat

(

uint64

ui64

)

Definition at line 366 of file tif_aux.c.

{
    _Int64 i;
 
    i.value = ui64;
    if (i.part.high >= 0) {
        return (float)i.value;
    } else {
        long double df;
        df = (long double)i.value;
        df += 18446744073709551616.0; /* adding 2**64 */
        return (float)df;
    }
}

Referenced by TIFFReadDirEntryFloat(), and TIFFReadDirEntryFloatArray().

TIFFDefaultRefBlackWhite()

static int TIFFDefaultRefBlackWhite ( TIFFDirectory *  td )

static

Definition at line 171 of file tif_aux.c.

{
    int i;
 
        td->td_refblackwhite = (float *)_TIFFmalloc(6*sizeof (float));
    if (td->td_refblackwhite == NULL)
        return 0;
        if (td->td_photometric == PHOTOMETRIC_YCBCR) {
        /*
         * YCbCr (Class Y) images must have the ReferenceBlackWhite
         * tag set. Fix the broken images, which lacks that tag.
         */
        td->td_refblackwhite[0] = 0.0F;
        td->td_refblackwhite[1] = td->td_refblackwhite[3] =
            td->td_refblackwhite[5] = 255.0F;
        td->td_refblackwhite[2] = td->td_refblackwhite[4] = 128.0F;
    } else {
        /*
         * Assume RGB (Class R)
         */
        for (i = 0; i < 3; i++) {
            td->td_refblackwhite[2*i+0] = 0;
            td->td_refblackwhite[2*i+1] =
                (float)((1L<<td->td_bitspersample)-1L);
        }
    }
    return 1;
}

Referenced by TIFFVGetFieldDefaulted().

TIFFDefaultTransferFunction()

static int TIFFDefaultTransferFunction ( TIFFDirectory *  td )

static

Definition at line 127 of file tif_aux.c.

{
    uint16 **tf = td->td_transferfunction;
    tmsize_t i, n, nbytes;
 
    tf[0] = tf[1] = tf[2] = 0;
    if (td->td_bitspersample >= sizeof(tmsize_t) * 8 - 2)
        return 0;
 
    n = ((tmsize_t)1)<<td->td_bitspersample;
    nbytes = n * sizeof (uint16);
        tf[0] = (uint16 *)_TIFFmalloc(nbytes);
    if (tf[0] == NULL)
        return 0;
    tf[0][0] = 0;
    for (i = 1; i < n; i++) {
        double t = (double)i/((double) n-1.);
        tf[0][i] = (uint16)floor(65535.*pow(t, 2.2) + .5);
    }
 
    if (td->td_samplesperpixel - td->td_extrasamples > 1) {
                tf[1] = (uint16 *)_TIFFmalloc(nbytes);
        if(tf[1] == NULL)
            goto bad;
        _TIFFmemcpy(tf[1], tf[0], nbytes);
                tf[2] = (uint16 *)_TIFFmalloc(nbytes);
        if (tf[2] == NULL)
            goto bad;
        _TIFFmemcpy(tf[2], tf[0], nbytes);
    }
    return 1;
 
bad:
    if (tf[0])
        _TIFFfree(tf[0]);
    if (tf[1])
        _TIFFfree(tf[1]);
    if (tf[2])
        _TIFFfree(tf[2]);
    tf[0] = tf[1] = tf[2] = 0;
    return 0;
}

Referenced by TIFFVGetFieldDefaulted().

TIFFGetFieldDefaulted()

int TIFFGetFieldDefaulted	(	TIFF *	tif,
		uint32	tag,
			...
	)

Definition at line 345 of file tif_aux.c.

{
    int ok;
    va_list ap;
 
    va_start(ap, tag);
    ok =  TIFFVGetFieldDefaulted(tif, tag, ap);
    va_end(ap);
    return (ok);
}

Referenced by gtStripContig(), gtStripSeparate(), initCIELabConversion(), initYCbCrConversion(), PickContigCase(), PickSeparateCase(), TIFFReadRGBAStripExt(), TIFFReadRGBATileExt(), TIFFRGBAImageBegin(), TIFFRGBAImageOK(), TIFFScanlineSize64(), TIFFVStripSize64(), TIFFVTileSize64(), and TIFFWriteDirectorySec().

TIFFVGetFieldDefaulted()

int TIFFVGetFieldDefaulted	(	TIFF *	tif,
		uint32	tag,
		va_list	ap
	)

Definition at line 209 of file tif_aux.c.

{
    TIFFDirectory *td = &tif->tif_dir;
 
    if (TIFFVGetField(tif, tag, ap))
        return (1);
    switch (tag) {
    case TIFFTAG_SUBFILETYPE:
        *va_arg(ap, uint32 *) = td->td_subfiletype;
        return (1);
    case TIFFTAG_BITSPERSAMPLE:
        *va_arg(ap, uint16 *) = td->td_bitspersample;
        return (1);
    case TIFFTAG_THRESHHOLDING:
        *va_arg(ap, uint16 *) = td->td_threshholding;
        return (1);
    case TIFFTAG_FILLORDER:
        *va_arg(ap, uint16 *) = td->td_fillorder;
        return (1);
    case TIFFTAG_ORIENTATION:
        *va_arg(ap, uint16 *) = td->td_orientation;
        return (1);
    case TIFFTAG_SAMPLESPERPIXEL:
        *va_arg(ap, uint16 *) = td->td_samplesperpixel;
        return (1);
    case TIFFTAG_ROWSPERSTRIP:
        *va_arg(ap, uint32 *) = td->td_rowsperstrip;
        return (1);
    case TIFFTAG_MINSAMPLEVALUE:
        *va_arg(ap, uint16 *) = td->td_minsamplevalue;
        return (1);
    case TIFFTAG_MAXSAMPLEVALUE:
        *va_arg(ap, uint16 *) = td->td_maxsamplevalue;
        return (1);
    case TIFFTAG_PLANARCONFIG:
        *va_arg(ap, uint16 *) = td->td_planarconfig;
        return (1);
    case TIFFTAG_RESOLUTIONUNIT:
        *va_arg(ap, uint16 *) = td->td_resolutionunit;
        return (1);
    case TIFFTAG_PREDICTOR:
    {
        TIFFPredictorState* sp = (TIFFPredictorState*) tif->tif_data;
        if( sp == NULL )
        {
            TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
                         "Cannot get \"Predictor\" tag as plugin is not configured");
            *va_arg(ap, uint16*) = 0;
            return 0;
        }
        *va_arg(ap, uint16*) = (uint16) sp->predictor;
        return 1;
    }
    case TIFFTAG_DOTRANGE:
        *va_arg(ap, uint16 *) = 0;
        *va_arg(ap, uint16 *) = (1<<td->td_bitspersample)-1;
        return (1);
    case TIFFTAG_INKSET:
        *va_arg(ap, uint16 *) = INKSET_CMYK;
        return 1;
    case TIFFTAG_NUMBEROFINKS:
        *va_arg(ap, uint16 *) = 4;
        return (1);
    case TIFFTAG_EXTRASAMPLES:
        *va_arg(ap, uint16 *) = td->td_extrasamples;
        *va_arg(ap, uint16 **) = td->td_sampleinfo;
        return (1);
    case TIFFTAG_MATTEING:
        *va_arg(ap, uint16 *) =
            (td->td_extrasamples == 1 &&
             td->td_sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA);
        return (1);
    case TIFFTAG_TILEDEPTH:
        *va_arg(ap, uint32 *) = td->td_tiledepth;
        return (1);
    case TIFFTAG_DATATYPE:
        *va_arg(ap, uint16 *) = td->td_sampleformat-1;
        return (1);
    case TIFFTAG_SAMPLEFORMAT:
        *va_arg(ap, uint16 *) = td->td_sampleformat;
                return(1);
    case TIFFTAG_IMAGEDEPTH:
        *va_arg(ap, uint32 *) = td->td_imagedepth;
        return (1);
    case TIFFTAG_YCBCRCOEFFICIENTS:
        {
            /* defaults are from CCIR Recommendation 601-1 */
            static float ycbcrcoeffs[] = { 0.299f, 0.587f, 0.114f };
            *va_arg(ap, float **) = ycbcrcoeffs;
            return 1;
        }
    case TIFFTAG_YCBCRSUBSAMPLING:
        *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[0];
        *va_arg(ap, uint16 *) = td->td_ycbcrsubsampling[1];
        return (1);
    case TIFFTAG_YCBCRPOSITIONING:
        *va_arg(ap, uint16 *) = td->td_ycbcrpositioning;
        return (1);
    case TIFFTAG_WHITEPOINT:
        {
            static float whitepoint[2];
 
            /* TIFF 6.0 specification tells that it is no default
               value for the WhitePoint, but AdobePhotoshop TIFF
               Technical Note tells that it should be CIE D50. */
            whitepoint[0] = D50_X0 / (D50_X0 + D50_Y0 + D50_Z0);
            whitepoint[1] = D50_Y0 / (D50_X0 + D50_Y0 + D50_Z0);
            *va_arg(ap, float **) = whitepoint;
            return 1;
        }
    case TIFFTAG_TRANSFERFUNCTION:
        if (!td->td_transferfunction[0] &&
            !TIFFDefaultTransferFunction(td)) {
            TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "No space for \"TransferFunction\" tag");
            return (0);
        }
        *va_arg(ap, uint16 **) = td->td_transferfunction[0];
        if (td->td_samplesperpixel - td->td_extrasamples > 1) {
            *va_arg(ap, uint16 **) = td->td_transferfunction[1];
            *va_arg(ap, uint16 **) = td->td_transferfunction[2];
        }
        return (1);
    case TIFFTAG_REFERENCEBLACKWHITE:
        if (!td->td_refblackwhite && !TIFFDefaultRefBlackWhite(td))
            return (0);
        *va_arg(ap, float **) = td->td_refblackwhite;
        return (1);
    }
    return 0;
}

Referenced by TIFFGetFieldDefaulted().