/*

 * Copyright (c) 1988-1997 Sam Leffler

 * Copyright (c) 1991-1997 Silicon Graphics, Inc.

 *

 * Permission to use, copy, modify, distribute, and sell this software and

 * its documentation for any purpose is hereby granted without fee, provided

 * that (i) the above copyright notices and this permission notice appear in

 * all copies of the software and related documentation, and (ii) the names of

 * Sam Leffler and Silicon Graphics may not be used in any advertising or

 * publicity relating to the software without the specific, prior written

 * permission of Sam Leffler and Silicon Graphics.

 *

 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY

 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

 *

 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR

 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,

 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF

 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE

 * OF THIS SOFTWARE.

 */

/*

 * TIFF Library.

 *

 * Scanline-oriented Write Support

 */

#include "tiffiop.h"

#include <assert.h>

#include <stdio.h>

#define NOSTRIP ((uint32_t)(-1)) /* undefined state */

#define WRITECHECKSTRIPS(tif, module)                                          \

    (((tif)->tif_flags & TIFF_BEENWRITING) || TIFFWriteCheck((tif), 0, module))

#define WRITECHECKTILES(tif, module)                                           \

    (((tif)->tif_flags & TIFF_BEENWRITING) || TIFFWriteCheck((tif), 1, module))

#define BUFFERCHECK(tif)                                                       \

    ((((tif)->tif_flags & TIFF_BUFFERSETUP) && tif->tif_rawdata) ||            \

     TIFFWriteBufferSetup((tif), NULL, (tmsize_t)(-1)))

static int TIFFGrowStrips(TIFF *tif, uint32_t delta, const char *module);

static int TIFFAppendToStrip(TIFF *tif, uint32_t strip, uint8_t *data,

                             tmsize_t cc);

int TIFFWriteScanline(TIFF *tif, void *buf, uint32_t row, uint16_t sample)

{

    static const char module[] = "TIFFWriteScanline";

    TIFFDirectory *td;

    int status, imagegrew = 0;

    uint32_t strip;

    if (!WRITECHECKSTRIPS(tif, module))

        return (-1);

    /*

     * Handle delayed allocation of data buffer.  This

     * permits it to be sized more intelligently (using

     * directory information).

     */

    if (!BUFFERCHECK(tif))

        return (-1);

    tif->tif_flags |= TIFF_BUF4WRITE; /* not strictly sure this is right*/

    td = &tif->tif_dir;

    /*

     * Extend image length if needed

     * (but only for PlanarConfig=1).

     */

    if (row >= td->td_imagelength)

    { /* extend image */

        if (td->td_planarconfig == PLANARCONFIG_SEPARATE)

        {

            TIFFErrorExtR(

                tif, module,

                "Can not change \"ImageLength\" when using separate planes");

            return (-1);

        }

        td->td_imagelength = row + 1;

        imagegrew = 1;

    }

    /*

     * Calculate strip and check for crossings.

     */

    if (td->td_rowsperstrip == 0)

    {

        TIFFErrorExtR(tif, module,

                      "Cannot compute strip: RowsPerStrip is zero");

        return (-1);

    }

    if (td->td_planarconfig == PLANARCONFIG_SEPARATE)

    {

        uint64_t sample_offset;

        uint64_t strip64;

        if (sample >= td->td_samplesperpixel)

        {

            TIFFErrorExtR(tif, module, "%lu: Sample out of range, max %lu",

                          (unsigned long)sample,

                          (unsigned long)td->td_samplesperpixel);

            return (-1);

        }

        sample_offset =

            _TIFFMultiply64(tif, sample, td->td_stripsperimage, module);

        if (sample_offset == 0 && sample != 0 && td->td_stripsperimage != 0)

            return (-1);

        strip64 =

            _TIFFAdd64(tif, sample_offset, row / td->td_rowsperstrip, module);

        if (strip64 == 0 &&

            (sample_offset != 0 || (row / td->td_rowsperstrip) != 0))

            return (-1);

        strip = _TIFFCastUInt64ToUInt32(tif, strip64, module);

        if (strip == 0 && strip64 != 0)

            return (-1);

    }

    else

        strip = row / td->td_rowsperstrip;

    /*

     * Check strip array to make sure there's space. We don't support

     * dynamically growing files that have data organized in separate

     * bitplanes because it's too painful.  In that case we require that

     * the imagelength be set properly before the first write (so that the

     * strips array will be fully allocated above).

     */

    if (strip >= td->td_nstrips && !TIFFGrowStrips(tif, 1, module))

        return (-1);

    if (strip != tif->tif_dir.td_curstrip)

    {

        /*

         * Changing strips -- flush any data present.

         */

        if (!TIFFFlushData(tif))

            return (-1);

        tif->tif_dir.td_curstrip = strip;

        /*

         * Watch out for a growing image.  The value of strips/image

         * will initially be 1 (since it can't be deduced until the

         * imagelength is known).

         */

        if (strip >= td->td_stripsperimage && imagegrew)

            td->td_stripsperimage =

                TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip);

        if (td->td_stripsperimage == 0)

        {

            TIFFErrorExtR(tif, module, "Zero strips per image");

            return (-1);

        }

        tif->tif_dir.td_row =

            (strip % td->td_stripsperimage) * td->td_rowsperstrip;

        if ((tif->tif_flags & TIFF_CODERSETUP) == 0)

        {

            if (!(*tif->tif_setupencode)(tif))

                return (-1);

            tif->tif_flags |= TIFF_CODERSETUP;

        }

        tif->tif_rawcc = 0;

        tif->tif_rawcp = tif->tif_rawdata;

        /* this informs TIFFAppendToStrip() we have changed strip */

        tif->tif_curoff = 0;

        if (!(*tif->tif_preencode)(tif, sample))

            return (-1);

        tif->tif_flags |= TIFF_POSTENCODE;

    }

    /*

     * Ensure the write is either sequential or at the

     * beginning of a strip (or that we can randomly

     * access the data -- i.e. no encoding).

     */

    if (row != tif->tif_dir.td_row)

    {

        if (row < tif->tif_dir.td_row)

        {

            /*

             * Moving backwards within the same strip:

             * backup to the start and then decode

             * forward (below).

             */

            /* Coverity Scan warns about a potential division by zero given

             * an above check against zero, but I believe this is a false

             * positive.

             */

            assert(td->td_stripsperimage != 0);

            tif->tif_dir.td_row =

                (strip % td->td_stripsperimage) * td->td_rowsperstrip;

            tif->tif_rawcp = tif->tif_rawdata;

        }

        /*

         * Seek forward to the desired row.

         */

        if (!(*tif->tif_seek)(tif, row - tif->tif_dir.td_row))

            return (-1);

        tif->tif_dir.td_row = row;

    }

    /* swab if needed - note that source buffer will be altered */

    tif->tif_postdecode(tif, (uint8_t *)buf, tif->tif_dir.td_scanlinesize);

    status = (*tif->tif_encoderow)(tif, (uint8_t *)buf,

                                   tif->tif_dir.td_scanlinesize, sample);

    /* we are now poised at the beginning of the next row */

    tif->tif_dir.td_row = row + 1;

    return (status);

}

/* Make sure that at the first attempt of rewriting a tile/strip, we will have

 */

/* more bytes available in the output buffer than the previous byte count, */

/* so that TIFFAppendToStrip() will detect the overflow when it is called the

 * first */

/* time if the new compressed tile is bigger than the older one. (GDAL #4771) */

static int _TIFFReserveLargeEnoughWriteBuffer(TIFF *tif, uint32_t strip_or_tile)

{

    static const char module[] = "_TIFFReserveLargeEnoughWriteBuffer";

    TIFFDirectory *td = &tif->tif_dir;

    if (td->td_stripbytecount_p == NULL)

    {

        TIFFErrorExtR(tif, module, "Strip bytecount array pointer is NULL");

        return 0;

    }

    if (strip_or_tile == NOSTRIP || strip_or_tile >= td->td_nstrips)

    {

        TIFFErrorExtR(tif, module, "Strip/tile number not valid");

        return 0;

    }

    if (td->td_stripbytecount_p[strip_or_tile] > 0)

    {

        /* The +1 is to ensure at least one extra bytes */

        /* The +4 is because the LZW encoder flushes 4 bytes before the limit */

        uint64_t safe_buffer_size =

            (uint64_t)(td->td_stripbytecount_p[strip_or_tile] + 1 + 4);

        if (tif->tif_rawdatasize <= (tmsize_t)safe_buffer_size)

        {

            if (!(TIFFWriteBufferSetup(

                    tif, NULL,

                    (tmsize_t)TIFFroundup_64(safe_buffer_size, 1024))))

                return 0;

        }

    }

    return 1;

}

/*

 * Encode the supplied data and write it to the

 * specified strip.

 *

 * NB: Image length must be setup before writing.

 */

tmsize_t TIFFWriteEncodedStrip(TIFF *tif, uint32_t strip, void *data,

                               tmsize_t cc)

{

    static const char module[] = "TIFFWriteEncodedStrip";

    TIFFDirectory *td = &tif->tif_dir;

    uint16_t sample;

    if (!WRITECHECKSTRIPS(tif, module))

        return ((tmsize_t)-1);

    /*

     * Check strip array to make sure there's space.

     * We don't support dynamically growing files that

     * have data organized in separate bitplanes because

     * it's too painful.  In that case we require that

     * the imagelength be set properly before the first

     * write (so that the strips array will be fully

     * allocated above).

     */

    if (strip >= td->td_nstrips)

    {

        if (td->td_planarconfig == PLANARCONFIG_SEPARATE)

        {

            TIFFErrorExtR(

                tif, module,

                "Can not grow image by strips when using separate planes");

            return ((tmsize_t)-1);

        }

        if (!TIFFGrowStrips(tif, 1, module))

            return ((tmsize_t)-1);

        td->td_stripsperimage =

            TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip);

    }

    /*

     * Handle delayed allocation of data buffer.  This

     * permits it to be sized according to the directory

     * info.

     */

    if (!BUFFERCHECK(tif))

        return ((tmsize_t)-1);

    tif->tif_flags |= TIFF_BUF4WRITE;

    tif->tif_dir.td_curstrip = strip;

    /* this informs TIFFAppendToStrip() we have changed or reset strip */

    tif->tif_curoff = 0;

    if (!_TIFFReserveLargeEnoughWriteBuffer(tif, strip))

    {

        return ((tmsize_t)(-1));

    }

    tif->tif_rawcc = 0;

    tif->tif_rawcp = tif->tif_rawdata;

    if (td->td_stripsperimage == 0)

    {

        TIFFErrorExtR(tif, module, "Zero strips per image");

        return ((tmsize_t)-1);

    }

    tif->tif_dir.td_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;

    if ((tif->tif_flags & TIFF_CODERSETUP) == 0)

    {

        if (!(*tif->tif_setupencode)(tif))

            return ((tmsize_t)-1);

        tif->tif_flags |= TIFF_CODERSETUP;

    }

    tif->tif_flags &= ~TIFF_POSTENCODE;

    /* shortcut to avoid an extra memcpy() */

    if (td->td_compression == COMPRESSION_NONE)

    {

        /* swab if needed - note that source buffer will be altered */

        tif->tif_postdecode(tif, (uint8_t *)data, cc);

        if (!isFillOrder(tif, td->td_fillorder) &&

            (tif->tif_flags & TIFF_NOBITREV) == 0)

            TIFFReverseBits((uint8_t *)data, cc);

        if (cc > 0 && !TIFFAppendToStrip(tif, strip, (uint8_t *)data, cc))

            return ((tmsize_t)-1);

        return (cc);

    }

    sample = (uint16_t)(strip / td->td_stripsperimage);

    if (!(*tif->tif_preencode)(tif, sample))

        return ((tmsize_t)-1);

    /* swab if needed - note that source buffer will be altered */

    tif->tif_postdecode(tif, (uint8_t *)data, cc);

    if (!(*tif->tif_encodestrip)(tif, (uint8_t *)data, cc, sample))

        return ((tmsize_t)-1);

    if (!(*tif->tif_postencode)(tif))

        return ((tmsize_t)-1);

    if (!isFillOrder(tif, td->td_fillorder) &&

        (tif->tif_flags & TIFF_NOBITREV) == 0)

        TIFFReverseBits(tif->tif_rawdata, tif->tif_rawcc);

    if (tif->tif_rawcc > 0 &&

        !TIFFAppendToStrip(tif, strip, tif->tif_rawdata, tif->tif_rawcc))

        return ((tmsize_t)-1);

    tif->tif_rawcc = 0;

    tif->tif_rawcp = tif->tif_rawdata;

    return (cc);

}

/*

 * Write the supplied data to the specified strip.

 *

 * NB: Image length must be setup before writing.

 */

tmsize_t TIFFWriteRawStrip(TIFF *tif, uint32_t strip, void *data, tmsize_t cc)

{

    static const char module[] = "TIFFWriteRawStrip";

    TIFFDirectory *td = &tif->tif_dir;

    if (!WRITECHECKSTRIPS(tif, module))

        return ((tmsize_t)-1);

    /*

     * Check strip array to make sure there's space.

     * We don't support dynamically growing files that

     * have data organized in separate bitplanes because

     * it's too painful.  In that case we require that

     * the imagelength be set properly before the first

     * write (so that the strips array will be fully

     * allocated above).

     */

    if (strip >= td->td_nstrips)

    {

        if (td->td_planarconfig == PLANARCONFIG_SEPARATE)

        {

            TIFFErrorExtR(

                tif, module,

                "Can not grow image by strips when using separate planes");

            return ((tmsize_t)-1);

        }

        /*

         * Watch out for a growing image.  The value of

         * strips/image will initially be 1 (since it

         * can't be deduced until the imagelength is known).

         */

        if (strip >= td->td_stripsperimage)

            td->td_stripsperimage =

                TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip);

        if (!TIFFGrowStrips(tif, 1, module))

            return ((tmsize_t)-1);

    }

    if (tif->tif_dir.td_curstrip != strip)

    {

        tif->tif_dir.td_curstrip = strip;

        /* this informs TIFFAppendToStrip() we have changed or reset strip */

        tif->tif_curoff = 0;

    }

    if (td->td_stripsperimage == 0)

    {

        TIFFErrorExtR(tif, module, "Zero strips per image");

        return ((tmsize_t)-1);

    }

    tif->tif_dir.td_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip;

    return (TIFFAppendToStrip(tif, strip, (uint8_t *)data, cc) ? cc

                                                               : (tmsize_t)-1);

}

/*

 * Write and compress a tile of data.  The

 * tile is selected by the (x,y,z,s) coordinates.

 */

tmsize_t TIFFWriteTile(TIFF *tif, void *buf, uint32_t x, uint32_t y, uint32_t z,

                       uint16_t s)

{

    if (!TIFFCheckTile(tif, x, y, z, s))

        return ((tmsize_t)(-1));

    /*

     * NB: A tile size of -1 is used instead of tif_tilesize knowing

     *     that TIFFWriteEncodedTile will clamp this to the tile size.

     *     This is done because the tile size may not be defined until

     *     after the output buffer is setup in TIFFWriteBufferSetup.

     */

    return (TIFFWriteEncodedTile(tif, TIFFComputeTile(tif, x, y, z, s), buf,

                                 (tmsize_t)(-1)));

}

/*

 * Encode the supplied data and write it to the

 * specified tile.  There must be space for the

 * data.  The function clamps individual writes

 * to a tile to the tile size, but does not (and

 * can not) check that multiple writes to the same

 * tile do not write more than tile size data.

 *

 * NB: Image length must be setup before writing; this

 *     interface does not support automatically growing

 *     the image on each write (as TIFFWriteScanline does).

 */

tmsize_t TIFFWriteEncodedTile(TIFF *tif, uint32_t tile, void *data, tmsize_t cc)

{

    static const char module[] = "TIFFWriteEncodedTile";

    TIFFDirectory *td;

    uint16_t sample;

    uint32_t howmany32;

    if (!WRITECHECKTILES(tif, module))

        return ((tmsize_t)(-1));

    td = &tif->tif_dir;

    if (tile >= td->td_nstrips)

    {

        TIFFErrorExtR(tif, module, "Tile %lu out of range, max %lu",

                      (unsigned long)tile, (unsigned long)td->td_nstrips);

        return ((tmsize_t)(-1));

    }

    /*

     * Handle delayed allocation of data buffer.  This

     * permits it to be sized more intelligently (using

     * directory information).

     */

    if (!BUFFERCHECK(tif))

        return ((tmsize_t)(-1));

    tif->tif_flags |= TIFF_BUF4WRITE;

    tif->tif_dir.td_curtile = tile;

    /* this informs TIFFAppendToStrip() we have changed or reset tile */

    tif->tif_curoff = 0;

    if (!_TIFFReserveLargeEnoughWriteBuffer(tif, tile))

    {

        return ((tmsize_t)(-1));

    }

    tif->tif_rawcc = 0;

    tif->tif_rawcp = tif->tif_rawdata;

    /*

     * Compute tiles per row & per column to compute

     * current row and column

     */

    howmany32 = TIFFhowmany_32(td->td_imagelength, td->td_tilelength);

    if (howmany32 == 0)

    {

        TIFFErrorExtR(tif, module, "Zero tiles");

        return ((tmsize_t)(-1));

    }

    tif->tif_dir.td_row = (tile % howmany32) * td->td_tilelength;

    howmany32 = TIFFhowmany_32(td->td_imagewidth, td->td_tilewidth);

    if (howmany32 == 0)

    {

        TIFFErrorExtR(tif, module, "Zero tiles");

        return ((tmsize_t)(-1));

    }

    tif->tif_dir.td_col = (tile % howmany32) * td->td_tilewidth;

    if ((tif->tif_flags & TIFF_CODERSETUP) == 0)

    {

        if (!(*tif->tif_setupencode)(tif))

            return ((tmsize_t)(-1));

        tif->tif_flags |= TIFF_CODERSETUP;

    }

    tif->tif_flags &= ~TIFF_POSTENCODE;

    /*

     * Clamp write amount to the tile size.  This is mostly

     * done so that callers can pass in some large number

     * (e.g. -1) and have the tile size used instead.

     */

    if (cc < 1 || cc > tif->tif_dir.td_tilesize)

        cc = tif->tif_dir.td_tilesize;

    /* shortcut to avoid an extra memcpy() */

    if (td->td_compression == COMPRESSION_NONE)

    {

        /* swab if needed - note that source buffer will be altered */

        tif->tif_postdecode(tif, (uint8_t *)data, cc);

        if (!isFillOrder(tif, td->td_fillorder) &&

            (tif->tif_flags & TIFF_NOBITREV) == 0)

            TIFFReverseBits((uint8_t *)data, cc);

        if (cc > 0 && !TIFFAppendToStrip(tif, tile, (uint8_t *)data, cc))

            return ((tmsize_t)-1);

        return (cc);

    }

    sample = (uint16_t)(tile / td->td_stripsperimage);

    if (!(*tif->tif_preencode)(tif, sample))

        return ((tmsize_t)(-1));

    /* swab if needed - note that source buffer will be altered */

    tif->tif_postdecode(tif, (uint8_t *)data, cc);

    if (!(*tif->tif_encodetile)(tif, (uint8_t *)data, cc, sample))

        return ((tmsize_t)-1);

    if (!(*tif->tif_postencode)(tif))

        return ((tmsize_t)(-1));

    if (!isFillOrder(tif, td->td_fillorder) &&

        (tif->tif_flags & TIFF_NOBITREV) == 0)

        TIFFReverseBits((uint8_t *)tif->tif_rawdata, tif->tif_rawcc);

    if (tif->tif_rawcc > 0 &&

        !TIFFAppendToStrip(tif, tile, tif->tif_rawdata, tif->tif_rawcc))

        return ((tmsize_t)(-1));

    tif->tif_rawcc = 0;

    tif->tif_rawcp = tif->tif_rawdata;

    return (cc);

}

/*

 * Write the supplied data to the specified strip.

 * There must be space for the data; we don't check

 * if strips overlap!

 *

 * NB: Image length must be setup before writing; this

 *     interface does not support automatically growing

 *     the image on each write (as TIFFWriteScanline does).

 */

tmsize_t TIFFWriteRawTile(TIFF *tif, uint32_t tile, void *data, tmsize_t cc)

{

    static const char module[] = "TIFFWriteRawTile";

    if (!WRITECHECKTILES(tif, module))

        return ((tmsize_t)(-1));

    if (tile >= tif->tif_dir.td_nstrips)

    {

        TIFFErrorExtR(tif, module, "Tile %lu out of range, max %lu",

                      (unsigned long)tile,

                      (unsigned long)tif->tif_dir.td_nstrips);

        return ((tmsize_t)(-1));

    }

    return (TIFFAppendToStrip(tif, tile, (uint8_t *)data, cc) ? cc

                                                              : (tmsize_t)(-1));

}

#define isUnspecified(tif, f)                                                  \

    (TIFFFieldSet(tif, f) && (tif)->tif_dir.td_imagelength == 0)

int TIFFSetupStrips(TIFF *tif)

{

    TIFFDirectory *td = &tif->tif_dir;

    if (isTiled(tif))

        td->td_stripsperimage = isUnspecified(tif, FIELD_TILEDIMENSIONS)

                                    ? td->td_samplesperpixel

                                    : TIFFNumberOfTiles(tif);

    else

        td->td_stripsperimage = isUnspecified(tif, FIELD_ROWSPERSTRIP)

                                    ? td->td_samplesperpixel

                                    : TIFFNumberOfStrips(tif);

    td->td_nstrips = td->td_stripsperimage;

    /* TIFFWriteDirectoryTagData has a limitation to 0x80000000U bytes */

    if (td->td_nstrips >=

        0x80000000U / ((tif->tif_flags & TIFF_BIGTIFF) ? 0x8U : 0x4U))

    {

        TIFFErrorExtR(tif, "TIFFSetupStrips",

                      "Too large Strip/Tile Offsets/ByteCounts arrays");

        return 0;

    }

    if (td->td_planarconfig == PLANARCONFIG_SEPARATE)

        td->td_stripsperimage /= td->td_samplesperpixel;

    if (td->td_stripoffset_p != NULL)

        _TIFFfreeExt(tif, td->td_stripoffset_p);

    td->td_stripoffset_p = (uint64_t *)_TIFFCheckMalloc(

        tif, td->td_nstrips, sizeof(uint64_t), "for \"StripOffsets\" array");

    if (td->td_stripbytecount_p != NULL)

        _TIFFfreeExt(tif, td->td_stripbytecount_p);

    td->td_stripbytecount_p = (uint64_t *)_TIFFCheckMalloc(

        tif, td->td_nstrips, sizeof(uint64_t), "for \"StripByteCounts\" array");

    if (td->td_stripoffset_p == NULL || td->td_stripbytecount_p == NULL)

        return (0);

    /*

     * Place data at the end-of-file

     * (by setting offsets to zero).

     */

    _TIFFmemset(td->td_stripoffset_p, 0,

                (tmsize_t)((size_t)td->td_nstrips * sizeof(uint64_t)));

    _TIFFmemset(td->td_stripbytecount_p, 0,

                (tmsize_t)((size_t)td->td_nstrips * sizeof(uint64_t)));

    TIFFSetFieldBit(tif, FIELD_STRIPOFFSETS);

    TIFFSetFieldBit(tif, FIELD_STRIPBYTECOUNTS);

    return (1);

}

#undef isUnspecified

/*

 * Verify file is writable and that the directory

 * information is setup properly.  In doing the latter

 * we also "freeze" the state of the directory so

 * that important information is not changed.

 */

int TIFFWriteCheck(TIFF *tif, int tiles, const char *module)

{

    if (tif->tif_mode == O_RDONLY)

    {

        TIFFErrorExtR(tif, module, "File not open for writing");

        return (0);

    }

    if (tiles ^ isTiled(tif))

    {

        TIFFErrorExtR(tif, module,

                      tiles ? "Can not write tiles to a striped image"

                            : "Can not write scanlines to a tiled image");

        return (0);

    }

    _TIFFFillStriles(tif);

    /*

     * On the first write verify all the required information

     * has been setup and initialize any data structures that

     * had to wait until directory information was set.

     * Note that a lot of our work is assumed to remain valid

     * because we disallow any of the important parameters

     * from changing after we start writing (i.e. once

     * TIFF_BEENWRITING is set, TIFFSetField will only allow

     * the image's length to be changed).

     */

    if (!TIFFFieldSet(tif, FIELD_IMAGEDIMENSIONS))

    {

        TIFFErrorExtR(tif, module,

                      "Must set \"ImageWidth\" before writing data");

        return (0);

    }

    if (tif->tif_dir.td_stripoffset_p == NULL && !TIFFSetupStrips(tif))

    {

        tif->tif_dir.td_nstrips = 0;

        TIFFErrorExtR(tif, module, "No space for %s arrays",

                      isTiled(tif) ? "tile" : "strip");

        return (0);

    }

    if (isTiled(tif))

    {

        tif->tif_dir.td_tilesize = TIFFTileSize(tif);

        if (tif->tif_dir.td_tilesize == 0)

            return (0);

    }

    else

        tif->tif_dir.td_tilesize = (tmsize_t)(-1);

    tif->tif_dir.td_scanlinesize = TIFFScanlineSize(tif);

    if (tif->tif_dir.td_scanlinesize == 0)

        return (0);

    tif->tif_flags |= TIFF_BEENWRITING;

    if (tif->tif_dir.td_stripoffset_entry.tdir_tag != 0 &&

        tif->tif_dir.td_stripoffset_entry.tdir_count == 0 &&

        tif->tif_dir.td_stripoffset_entry.tdir_type == 0 &&

        tif->tif_dir.td_stripoffset_entry.tdir_offset.toff_long8 == 0 &&

        tif->tif_dir.td_stripbytecount_entry.tdir_tag != 0 &&

        tif->tif_dir.td_stripbytecount_entry.tdir_count == 0 &&

        tif->tif_dir.td_stripbytecount_entry.tdir_type == 0 &&

        tif->tif_dir.td_stripbytecount_entry.tdir_offset.toff_long8 == 0 &&

        !(tif->tif_flags & TIFF_DIRTYDIRECT))

    {

        TIFFForceStrileArrayWriting(tif);

    }

    return (1);

}

/*

 * Setup the raw data buffer used for encoding.

 */

int TIFFWriteBufferSetup(TIFF *tif, void *bp, tmsize_t size)

{

    static const char module[] = "TIFFWriteBufferSetup";

    if (tif->tif_rawdata)

    {

        if (tif->tif_flags & TIFF_MYBUFFER)

        {

            _TIFFfreeExt(tif, tif->tif_rawdata);

            tif->tif_flags &= ~TIFF_MYBUFFER;

        }

        tif->tif_rawdata = NULL;

    }

    if (size == (tmsize_t)(-1))

    {

        size = (isTiled(tif) ? tif->tif_dir.td_tilesize : TIFFStripSize(tif));

        /* Adds 10% margin for cases where compression would expand a bit */

        if (size < TIFF_TMSIZE_T_MAX - size / 10)

            size += size / 10;

        /*

         * Make raw data buffer at least 8K

         */

        if (size < 8 * 1024)

            size = 8 * 1024;

        bp = NULL; /* NB: force malloc */

    }

    if (bp == NULL)

    {

        bp = _TIFFmallocExt(tif, size);

        if (bp == NULL)

        {

            TIFFErrorExtR(tif, module, "No space for output buffer");

            return (0);

        }

        tif->tif_flags |= TIFF_MYBUFFER;

    }

    else

        tif->tif_flags &= ~TIFF_MYBUFFER;

    tif->tif_rawdata = (uint8_t *)bp;

    tif->tif_rawdatasize = size;

    tif->tif_rawcc = 0;

    tif->tif_rawcp = tif->tif_rawdata;

    tif->tif_flags |= TIFF_BUFFERSETUP;

    return (1);

}

/*

 * Grow the strip data structures by delta strips.

 */

static int TIFFGrowStrips(TIFF *tif, uint32_t delta, const char *module)

{

    TIFFDirectory *td = &tif->tif_dir;

    uint64_t *new_stripoffset;

    uint64_t *new_stripbytecount;

    assert(td->td_planarconfig == PLANARCONFIG_CONTIG);

    new_stripoffset = (uint64_t *)_TIFFreallocExt(

        tif, td->td_stripoffset_p,

        (tmsize_t)(((size_t)td->td_nstrips + (size_t)delta) *

                   sizeof(uint64_t)));

    /*

     * Update td_stripoffset_p immediately so the old pointer is not left

     * dangling if the second realloc fails.

     */

    if (new_stripoffset)

        td->td_stripoffset_p = new_stripoffset;

    new_stripbytecount = (uint64_t *)_TIFFreallocExt(

        tif, td->td_stripbytecount_p,

        (tmsize_t)(((size_t)td->td_nstrips + (size_t)delta) *

                   sizeof(uint64_t)));

    if (new_stripbytecount)

        td->td_stripbytecount_p = new_stripbytecount;

    if (new_stripoffset == NULL || new_stripbytecount == NULL)

    {

        td->td_nstrips = 0;

        TIFFErrorExtR(tif, module, "No space to expand strip arrays");

        return (0);

    }

    _TIFFmemset(td->td_stripoffset_p + td->td_nstrips, 0,

                (tmsize_t)((size_t)delta * sizeof(uint64_t)));

    _TIFFmemset(td->td_stripbytecount_p + td->td_nstrips, 0,

                (tmsize_t)((size_t)delta * sizeof(uint64_t)));

    td->td_nstrips += delta;

    tif->tif_flags |= TIFF_DIRTYDIRECT;

    return (1);

}

/*

 * Append the data to the specified strip.

 */

static int TIFFAppendToStrip(TIFF *tif, uint32_t strip, uint8_t *data,

                             tmsize_t cc)

{

    static const char module[] = "TIFFAppendToStrip";

    TIFFDirectory *td = &tif->tif_dir;

    uint64_t m;

    int64_t old_byte_count = -1;

    /* Some security checks */

    if (td->td_stripoffset_p == NULL)

    {

        TIFFErrorExtR(tif, module, "Strip offset array pointer is NULL");

        return (0);

    }

    if (td->td_stripbytecount_p == NULL)

    {

        TIFFErrorExtR(tif, module, "Strip bytecount array pointer is NULL");

        return (0);

    }

    if (strip == NOSTRIP)

    {

        TIFFErrorExtR(tif, module, "Strip number not valid (NOSTRIP)");

        return (0);

    }

    if (tif->tif_curoff == 0)

        tif->tif_lastvalidoff = 0;

    if (td->td_stripoffset_p[strip] == 0 || tif->tif_curoff == 0)

    {

        assert(td->td_nstrips > 0);

        if (td->td_stripbytecount_p[strip] != 0 &&

            td->td_stripoffset_p[strip] != 0 &&

            td->td_stripbytecount_p[strip] >= (uint64_t)cc)

        {

            /*

             * There is already tile data on disk, and the new tile

             * data we have will fit in the same space.  The only

             * aspect of this that is risky is that there could be

             * more data to append to this strip before we are done

             * depending on how we are getting called.

             */

            if (!SeekOK(tif, td->td_stripoffset_p[strip]))

            {

                TIFFErrorExtR(tif, module, "Seek error at scanline %lu",

                              (unsigned long)tif->tif_dir.td_row);

                return (0);

            }

            tif->tif_lastvalidoff =

                td->td_stripoffset_p[strip] + td->td_stripbytecount_p[strip];

        }

        else

        {

            /*

             * Seek to end of file, and set that as our location to

             * write this strip.

             */

            td->td_stripoffset_p[strip] = TIFFSeekFile(tif, 0, SEEK_END);

            tif->tif_flags |= TIFF_DIRTYSTRIP;

        }

        tif->tif_curoff = td->td_stripoffset_p[strip];

        /*

         * We are starting a fresh strip/tile, so set the size to zero.

         */

        old_byte_count = (int64_t)td->td_stripbytecount_p[strip];

        td->td_stripbytecount_p[strip] = 0;

    }

    m = tif->tif_curoff + (uint64_t)cc;

    if (!(tif->tif_flags & TIFF_BIGTIFF))

        m = (uint32_t)m;

    if ((m < tif->tif_curoff) || (m < (uint64_t)cc))

    {

        TIFFErrorExtR(tif, module, "Maximum TIFF file size exceeded");

        return (0);

    }

    if (tif->tif_lastvalidoff != 0 && m > tif->tif_lastvalidoff &&

        td->td_stripbytecount_p[strip] > 0)

    {

        /* Ouch: we have detected that we are rewriting in place a strip/tile */

        /* with several calls to TIFFAppendToStrip(). The first call was with */

        /* a size smaller than the previous size of the strip/tile, so we */

        /* opted to rewrite in place, but a following call causes us to go */

        /* outsize of the strip/tile area, so we have to finally go for a */

        /* append-at-end-of-file strategy, and start by moving what we already

         */

        /* wrote. */

        tmsize_t tempSize;

        void *temp;

        uint64_t offsetRead;

        uint64_t offsetWrite;

        uint64_t toCopy = td->td_stripbytecount_p[strip];

        if (toCopy < 1024 * 1024)

            tempSize = (tmsize_t)toCopy;

        else

            tempSize = 1024 * 1024;

        offsetRead = td->td_stripoffset_p[strip];

        offsetWrite = TIFFSeekFile(tif, 0, SEEK_END);

        m = offsetWrite + (uint64_t)toCopy + (uint64_t)cc;

        if (!(tif->tif_flags & TIFF_BIGTIFF) && m != (uint32_t)m)

        {

            TIFFErrorExtR(tif, module, "Maximum TIFF file size exceeded");

            return (0);

        }

        temp = _TIFFmallocExt(tif, tempSize);

        if (temp == NULL)

        {

            TIFFErrorExtR(tif, module, "No space for output buffer");

            return (0);