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Diffstat (limited to 'tiff/libtiff/tif_read.c')
| -rwxr-xr-x | tiff/libtiff/tif_read.c | 1086 |
1 files changed, 1086 insertions, 0 deletions
diff --git a/tiff/libtiff/tif_read.c b/tiff/libtiff/tif_read.c new file mode 100755 index 0000000..b009519 --- /dev/null +++ b/tiff/libtiff/tif_read.c @@ -0,0 +1,1086 @@ +/* $Id: tif_read.c,v 1.44 2014-12-23 10:15:35 erouault Exp $ */ + +/* + * 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 Read Support + */ +#include "tiffiop.h" +#include <stdio.h> + +int TIFFFillStrip(TIFF* tif, uint32 strip); +int TIFFFillTile(TIFF* tif, uint32 tile); +static int TIFFStartStrip(TIFF* tif, uint32 strip); +static int TIFFStartTile(TIFF* tif, uint32 tile); +static int TIFFCheckRead(TIFF*, int); +static tmsize_t +TIFFReadRawStrip1(TIFF* tif, uint32 strip, void* buf, tmsize_t size,const char* module); + +#define NOSTRIP ((uint32)(-1)) /* undefined state */ +#define NOTILE ((uint32)(-1)) /* undefined state */ + +static int +TIFFFillStripPartial( TIFF *tif, int strip, tmsize_t read_ahead, int restart ) +{ + static const char module[] = "TIFFFillStripPartial"; + register TIFFDirectory *td = &tif->tif_dir; + tmsize_t unused_data; + uint64 read_offset; + tmsize_t cc, to_read; + /* tmsize_t bytecountm; */ + + if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount) + return 0; + + /* + * Expand raw data buffer, if needed, to hold data + * strip coming from file (perhaps should set upper + * bound on the size of a buffer we'll use?). + */ + + /* bytecountm=(tmsize_t) td->td_stripbytecount[strip]; */ + if (read_ahead*2 > tif->tif_rawdatasize) { + assert( restart ); + + tif->tif_curstrip = NOSTRIP; + if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { + TIFFErrorExt(tif->tif_clientdata, module, + "Data buffer too small to hold part of strip %lu", + (unsigned long) strip); + return (0); + } + if (!TIFFReadBufferSetup(tif, 0, read_ahead*2)) + return (0); + } + + if( restart ) + { + tif->tif_rawdataloaded = 0; + tif->tif_rawdataoff = 0; + } + + /* + ** If we are reading more data, move any unused data to the + ** start of the buffer. + */ + if( tif->tif_rawdataloaded > 0 ) + unused_data = tif->tif_rawdataloaded - (tif->tif_rawcp - tif->tif_rawdata); + else + unused_data = 0; + + if( unused_data > 0 ) + { + assert((tif->tif_flags&TIFF_BUFFERMMAP)==0); + memmove( tif->tif_rawdata, tif->tif_rawcp, unused_data ); + } + + /* + ** Seek to the point in the file where more data should be read. + */ + read_offset = td->td_stripoffset[strip] + + tif->tif_rawdataoff + tif->tif_rawdataloaded; + + if (!SeekOK(tif, read_offset)) { + TIFFErrorExt(tif->tif_clientdata, module, + "Seek error at scanline %lu, strip %lu", + (unsigned long) tif->tif_row, (unsigned long) strip); + return 0; + } + + /* + ** How much do we want to read? + */ + to_read = tif->tif_rawdatasize - unused_data; + if( (uint64) to_read > td->td_stripbytecount[strip] + - tif->tif_rawdataoff - tif->tif_rawdataloaded ) + { + to_read = (tmsize_t) td->td_stripbytecount[strip] + - tif->tif_rawdataoff - tif->tif_rawdataloaded; + } + + assert((tif->tif_flags&TIFF_BUFFERMMAP)==0); + cc = TIFFReadFile(tif, tif->tif_rawdata + unused_data, to_read); + + if (cc != to_read) { +#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, + "Read error at scanline %lu; got %I64u bytes, expected %I64u", + (unsigned long) tif->tif_row, + (unsigned __int64) cc, + (unsigned __int64) to_read); +#else + TIFFErrorExt(tif->tif_clientdata, module, + "Read error at scanline %lu; got %llu bytes, expected %llu", + (unsigned long) tif->tif_row, + (unsigned long long) cc, + (unsigned long long) to_read); +#endif + return 0; + } + + tif->tif_rawdataoff = tif->tif_rawdataoff + tif->tif_rawdataloaded - unused_data ; + tif->tif_rawdataloaded = unused_data + to_read; + + tif->tif_rawcp = tif->tif_rawdata; + + if (!isFillOrder(tif, td->td_fillorder) && + (tif->tif_flags & TIFF_NOBITREV) == 0) { + assert((tif->tif_flags&TIFF_BUFFERMMAP)==0); + TIFFReverseBits(tif->tif_rawdata + unused_data, to_read ); + } + + /* + ** When starting a strip from the beginning we need to + ** restart the decoder. + */ + if( restart ) + return TIFFStartStrip(tif, strip); + else + return 1; +} + +/* + * Seek to a random row+sample in a file. + * + * Only used by TIFFReadScanline, and is only used on + * strip organized files. We do some tricky stuff to try + * and avoid reading the whole compressed raw data for big + * strips. + */ +static int +TIFFSeek(TIFF* tif, uint32 row, uint16 sample ) +{ + register TIFFDirectory *td = &tif->tif_dir; + uint32 strip; + int whole_strip; + tmsize_t read_ahead = 0; + + /* + ** Establish what strip we are working from. + */ + if (row >= td->td_imagelength) { /* out of range */ + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "%lu: Row out of range, max %lu", + (unsigned long) row, + (unsigned long) td->td_imagelength); + return (0); + } + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) { + if (sample >= td->td_samplesperpixel) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, + "%lu: Sample out of range, max %lu", + (unsigned long) sample, (unsigned long) td->td_samplesperpixel); + return (0); + } + strip = (uint32)sample*td->td_stripsperimage + row/td->td_rowsperstrip; + } else + strip = row / td->td_rowsperstrip; + + /* + * Do we want to treat this strip as one whole chunk or + * read it a few lines at a time? + */ +#if defined(CHUNKY_STRIP_READ_SUPPORT) + if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount) + return 0; + whole_strip = tif->tif_dir.td_stripbytecount[strip] < 10 + || isMapped(tif); +#else + whole_strip = 1; +#endif + + if( !whole_strip ) + { + read_ahead = tif->tif_scanlinesize * 16 + 5000; + } + + /* + * If we haven't loaded this strip, do so now, possibly + * only reading the first part. + */ + if (strip != tif->tif_curstrip) { /* different strip, refill */ + + if( whole_strip ) + { + if (!TIFFFillStrip(tif, strip)) + return (0); + } + else + { + if( !TIFFFillStripPartial(tif,strip,read_ahead,1) ) + return 0; + } + } + + /* + ** If we already have some data loaded, do we need to read some more? + */ + else if( !whole_strip ) + { + if( ((tif->tif_rawdata + tif->tif_rawdataloaded) - tif->tif_rawcp) < read_ahead + && (uint64) tif->tif_rawdataoff+tif->tif_rawdataloaded < td->td_stripbytecount[strip] ) + { + if( !TIFFFillStripPartial(tif,strip,read_ahead,0) ) + return 0; + } + } + + if (row < tif->tif_row) { + /* + * Moving backwards within the same strip: backup + * to the start and then decode forward (below). + * + * NB: If you're planning on lots of random access within a + * strip, it's better to just read and decode the entire + * strip, and then access the decoded data in a random fashion. + */ + + if( tif->tif_rawdataoff != 0 ) + { + if( !TIFFFillStripPartial(tif,strip,read_ahead,1) ) + return 0; + } + else + { + if (!TIFFStartStrip(tif, strip)) + return (0); + } + } + + if (row != tif->tif_row) { + /* + * Seek forward to the desired row. + */ + + /* TODO: Will this really work with partial buffers? */ + + if (!(*tif->tif_seek)(tif, row - tif->tif_row)) + return (0); + tif->tif_row = row; + } + + return (1); +} + +int +TIFFReadScanline(TIFF* tif, void* buf, uint32 row, uint16 sample) +{ + int e; + + if (!TIFFCheckRead(tif, 0)) + return (-1); + if( (e = TIFFSeek(tif, row, sample)) != 0) { + /* + * Decompress desired row into user buffer. + */ + e = (*tif->tif_decoderow) + (tif, (uint8*) buf, tif->tif_scanlinesize, sample); + + /* we are now poised at the beginning of the next row */ + tif->tif_row = row + 1; + + if (e) + (*tif->tif_postdecode)(tif, (uint8*) buf, + tif->tif_scanlinesize); + } + return (e > 0 ? 1 : -1); +} + +/* + * Read a strip of data and decompress the specified + * amount into the user-supplied buffer. + */ +tmsize_t +TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) +{ + static const char module[] = "TIFFReadEncodedStrip"; + TIFFDirectory *td = &tif->tif_dir; + uint32 rowsperstrip; + uint32 stripsperplane; + uint32 stripinplane; + uint16 plane; + uint32 rows; + tmsize_t stripsize; + if (!TIFFCheckRead(tif,0)) + return((tmsize_t)(-1)); + if (strip>=td->td_nstrips) + { + TIFFErrorExt(tif->tif_clientdata,module, + "%lu: Strip out of range, max %lu",(unsigned long)strip, + (unsigned long)td->td_nstrips); + return((tmsize_t)(-1)); + } + /* + * Calculate the strip size according to the number of + * rows in the strip (check for truncated last strip on any + * of the separations). + */ + rowsperstrip=td->td_rowsperstrip; + if (rowsperstrip>td->td_imagelength) + rowsperstrip=td->td_imagelength; + stripsperplane=((td->td_imagelength+rowsperstrip-1)/rowsperstrip); + stripinplane=(strip%stripsperplane); + plane=(strip/stripsperplane); + rows=td->td_imagelength-stripinplane*rowsperstrip; + if (rows>rowsperstrip) + rows=rowsperstrip; + stripsize=TIFFVStripSize(tif,rows); + if (stripsize==0) + return((tmsize_t)(-1)); + if ((size!=(tmsize_t)(-1))&&(size<stripsize)) + stripsize=size; + if (!TIFFFillStrip(tif,strip)) + return((tmsize_t)(-1)); + if ((*tif->tif_decodestrip)(tif,buf,stripsize,plane)<=0) + return((tmsize_t)(-1)); + (*tif->tif_postdecode)(tif,buf,stripsize); + return(stripsize); +} + +static tmsize_t +TIFFReadRawStrip1(TIFF* tif, uint32 strip, void* buf, tmsize_t size, + const char* module) +{ + TIFFDirectory *td = &tif->tif_dir; + + if (!_TIFFFillStriles( tif )) + return ((tmsize_t)(-1)); + + assert((tif->tif_flags&TIFF_NOREADRAW)==0); + if (!isMapped(tif)) { + tmsize_t cc; + + if (!SeekOK(tif, td->td_stripoffset[strip])) { + TIFFErrorExt(tif->tif_clientdata, module, + "Seek error at scanline %lu, strip %lu", + (unsigned long) tif->tif_row, (unsigned long) strip); + return ((tmsize_t)(-1)); + } + cc = TIFFReadFile(tif, buf, size); + if (cc != size) { +#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, + "Read error at scanline %lu; got %I64u bytes, expected %I64u", + (unsigned long) tif->tif_row, + (unsigned __int64) cc, + (unsigned __int64) size); +#else + TIFFErrorExt(tif->tif_clientdata, module, + "Read error at scanline %lu; got %llu bytes, expected %llu", + (unsigned long) tif->tif_row, + (unsigned long long) cc, + (unsigned long long) size); +#endif + return ((tmsize_t)(-1)); + } + } else { + tmsize_t ma,mb; + tmsize_t n; + ma=(tmsize_t)td->td_stripoffset[strip]; + mb=ma+size; + if (((uint64)ma!=td->td_stripoffset[strip])||(ma>tif->tif_size)) + n=0; + else if ((mb<ma)||(mb<size)||(mb>tif->tif_size)) + n=tif->tif_size-ma; + else + n=size; + if (n!=size) { +#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, + "Read error at scanline %lu, strip %lu; got %I64u bytes, expected %I64u", + (unsigned long) tif->tif_row, + (unsigned long) strip, + (unsigned __int64) n, + (unsigned __int64) size); +#else + TIFFErrorExt(tif->tif_clientdata, module, + "Read error at scanline %lu, strip %lu; got %llu bytes, expected %llu", + (unsigned long) tif->tif_row, + (unsigned long) strip, + (unsigned long long) n, + (unsigned long long) size); +#endif + return ((tmsize_t)(-1)); + } + _TIFFmemcpy(buf, tif->tif_base + ma, + size); + } + return (size); +} + +/* + * Read a strip of data from the file. + */ +tmsize_t +TIFFReadRawStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) +{ + static const char module[] = "TIFFReadRawStrip"; + TIFFDirectory *td = &tif->tif_dir; + uint64 bytecount; + tmsize_t bytecountm; + + if (!TIFFCheckRead(tif, 0)) + return ((tmsize_t)(-1)); + if (strip >= td->td_nstrips) { + TIFFErrorExt(tif->tif_clientdata, module, + "%lu: Strip out of range, max %lu", + (unsigned long) strip, + (unsigned long) td->td_nstrips); + return ((tmsize_t)(-1)); + } + if (tif->tif_flags&TIFF_NOREADRAW) + { + TIFFErrorExt(tif->tif_clientdata, module, + "Compression scheme does not support access to raw uncompressed data"); + return ((tmsize_t)(-1)); + } + bytecount = td->td_stripbytecount[strip]; + if ((int64)bytecount <= 0) { +#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, + "%I64u: Invalid strip byte count, strip %lu", + (unsigned __int64) bytecount, + (unsigned long) strip); +#else + TIFFErrorExt(tif->tif_clientdata, module, + "%llu: Invalid strip byte count, strip %lu", + (unsigned long long) bytecount, + (unsigned long) strip); +#endif + return ((tmsize_t)(-1)); + } + bytecountm = (tmsize_t)bytecount; + if ((uint64)bytecountm!=bytecount) { + TIFFErrorExt(tif->tif_clientdata, module, "Integer overflow"); + return ((tmsize_t)(-1)); + } + if (size != (tmsize_t)(-1) && size < bytecountm) + bytecountm = size; + return (TIFFReadRawStrip1(tif, strip, buf, bytecountm, module)); +} + +/* + * Read the specified strip and setup for decoding. The data buffer is + * expanded, as necessary, to hold the strip's data. + */ +int +TIFFFillStrip(TIFF* tif, uint32 strip) +{ + static const char module[] = "TIFFFillStrip"; + TIFFDirectory *td = &tif->tif_dir; + + if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount) + return 0; + + if ((tif->tif_flags&TIFF_NOREADRAW)==0) + { + uint64 bytecount = td->td_stripbytecount[strip]; + if ((int64)bytecount <= 0) { +#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, + "Invalid strip byte count %I64u, strip %lu", + (unsigned __int64) bytecount, + (unsigned long) strip); +#else + TIFFErrorExt(tif->tif_clientdata, module, + "Invalid strip byte count %llu, strip %lu", + (unsigned long long) bytecount, + (unsigned long) strip); +#endif + return (0); + } + if (isMapped(tif) && + (isFillOrder(tif, td->td_fillorder) + || (tif->tif_flags & TIFF_NOBITREV))) { + /* + * The image is mapped into memory and we either don't + * need to flip bits or the compression routine is + * going to handle this operation itself. In this + * case, avoid copying the raw data and instead just + * reference the data from the memory mapped file + * image. This assumes that the decompression + * routines do not modify the contents of the raw data + * buffer (if they try to, the application will get a + * fault since the file is mapped read-only). + */ + if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) { + _TIFFfree(tif->tif_rawdata); + tif->tif_rawdata = NULL; + tif->tif_rawdatasize = 0; + } + tif->tif_flags &= ~TIFF_MYBUFFER; + /* + * We must check for overflow, potentially causing + * an OOB read. Instead of simple + * + * td->td_stripoffset[strip]+bytecount > tif->tif_size + * + * comparison (which can overflow) we do the following + * two comparisons: + */ + if (bytecount > (uint64)tif->tif_size || + td->td_stripoffset[strip] > (uint64)tif->tif_size - bytecount) { + /* + * This error message might seem strange, but + * it's what would happen if a read were done + * instead. + */ +#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, + + "Read error on strip %lu; " + "got %I64u bytes, expected %I64u", + (unsigned long) strip, + (unsigned __int64) tif->tif_size - td->td_stripoffset[strip], + (unsigned __int64) bytecount); +#else + TIFFErrorExt(tif->tif_clientdata, module, + + "Read error on strip %lu; " + "got %llu bytes, expected %llu", + (unsigned long) strip, + (unsigned long long) tif->tif_size - td->td_stripoffset[strip], + (unsigned long long) bytecount); +#endif + tif->tif_curstrip = NOSTRIP; + return (0); + } + tif->tif_rawdatasize = (tmsize_t)bytecount; + tif->tif_rawdata = tif->tif_base + (tmsize_t)td->td_stripoffset[strip]; + tif->tif_rawdataoff = 0; + tif->tif_rawdataloaded = (tmsize_t) bytecount; + + /* + * When we have tif_rawdata reference directly into the memory mapped file + * we need to be pretty careful about how we use the rawdata. It is not + * a general purpose working buffer as it normally otherwise is. So we + * keep track of this fact to avoid using it improperly. + */ + tif->tif_flags |= TIFF_BUFFERMMAP; + } else { + /* + * Expand raw data buffer, if needed, to hold data + * strip coming from file (perhaps should set upper + * bound on the size of a buffer we'll use?). + */ + tmsize_t bytecountm; + bytecountm=(tmsize_t)bytecount; + if ((uint64)bytecountm!=bytecount) + { + TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); + return(0); + } + if (bytecountm > tif->tif_rawdatasize) { + tif->tif_curstrip = NOSTRIP; + if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { + TIFFErrorExt(tif->tif_clientdata, module, + "Data buffer too small to hold strip %lu", + (unsigned long) strip); + return (0); + } + if (!TIFFReadBufferSetup(tif, 0, bytecountm)) + return (0); + } + if (tif->tif_flags&TIFF_BUFFERMMAP) { + tif->tif_curstrip = NOSTRIP; + if (!TIFFReadBufferSetup(tif, 0, bytecountm)) + return (0); + } + if (TIFFReadRawStrip1(tif, strip, tif->tif_rawdata, + bytecountm, module) != bytecountm) + return (0); + + tif->tif_rawdataoff = 0; + tif->tif_rawdataloaded = bytecountm; + + if (!isFillOrder(tif, td->td_fillorder) && + (tif->tif_flags & TIFF_NOBITREV) == 0) + TIFFReverseBits(tif->tif_rawdata, bytecountm); + } + } + return (TIFFStartStrip(tif, strip)); +} + +/* + * Tile-oriented Read Support + * Contributed by Nancy Cam (Silicon Graphics). + */ + +/* + * Read and decompress a tile of data. The + * tile is selected by the (x,y,z,s) coordinates. + */ +tmsize_t +TIFFReadTile(TIFF* tif, void* buf, uint32 x, uint32 y, uint32 z, uint16 s) +{ + if (!TIFFCheckRead(tif, 1) || !TIFFCheckTile(tif, x, y, z, s)) + return ((tmsize_t)(-1)); + return (TIFFReadEncodedTile(tif, + TIFFComputeTile(tif, x, y, z, s), buf, (tmsize_t)(-1))); +} + +/* + * Read a tile of data and decompress the specified + * amount into the user-supplied buffer. + */ +tmsize_t +TIFFReadEncodedTile(TIFF* tif, uint32 tile, void* buf, tmsize_t size) +{ + static const char module[] = "TIFFReadEncodedTile"; + TIFFDirectory *td = &tif->tif_dir; + tmsize_t tilesize = tif->tif_tilesize; + + if (!TIFFCheckRead(tif, 1)) + return ((tmsize_t)(-1)); + if (tile >= td->td_nstrips) { + TIFFErrorExt(tif->tif_clientdata, module, + "%lu: Tile out of range, max %lu", + (unsigned long) tile, (unsigned long) td->td_nstrips); + return ((tmsize_t)(-1)); + } + if (size == (tmsize_t)(-1)) + size = tilesize; + else if (size > tilesize) + size = tilesize; + if (TIFFFillTile(tif, tile) && (*tif->tif_decodetile)(tif, + (uint8*) buf, size, (uint16)(tile/td->td_stripsperimage))) { + (*tif->tif_postdecode)(tif, (uint8*) buf, size); + return (size); + } else + return ((tmsize_t)(-1)); +} + +static tmsize_t +TIFFReadRawTile1(TIFF* tif, uint32 tile, void* buf, tmsize_t size, const char* module) +{ + TIFFDirectory *td = &tif->tif_dir; + + if (!_TIFFFillStriles( tif )) + return ((tmsize_t)(-1)); + + assert((tif->tif_flags&TIFF_NOREADRAW)==0); + if (!isMapped(tif)) { + tmsize_t cc; + + if (!SeekOK(tif, td->td_stripoffset[tile])) { + TIFFErrorExt(tif->tif_clientdata, module, + "Seek error at row %lu, col %lu, tile %lu", + (unsigned long) tif->tif_row, + (unsigned long) tif->tif_col, + (unsigned long) tile); + return ((tmsize_t)(-1)); + } + cc = TIFFReadFile(tif, buf, size); + if (cc != size) { +#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, + "Read error at row %lu, col %lu; got %I64u bytes, expected %I64u", + (unsigned long) tif->tif_row, + (unsigned long) tif->tif_col, + (unsigned __int64) cc, + (unsigned __int64) size); +#else + TIFFErrorExt(tif->tif_clientdata, module, + "Read error at row %lu, col %lu; got %llu bytes, expected %llu", + (unsigned long) tif->tif_row, + (unsigned long) tif->tif_col, + (unsigned long long) cc, + (unsigned long long) size); +#endif + return ((tmsize_t)(-1)); + } + } else { + tmsize_t ma,mb; + tmsize_t n; + ma=(tmsize_t)td->td_stripoffset[tile]; + mb=ma+size; + if (((uint64)ma!=td->td_stripoffset[tile])||(ma>tif->tif_size)) + n=0; + else if ((mb<ma)||(mb<size)||(mb>tif->tif_size)) + n=tif->tif_size-ma; + else + n=size; + if (n!=size) { +#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, +"Read error at row %lu, col %lu, tile %lu; got %I64u bytes, expected %I64u", + (unsigned long) tif->tif_row, + (unsigned long) tif->tif_col, + (unsigned long) tile, + (unsigned __int64) n, + (unsigned __int64) size); +#else + TIFFErrorExt(tif->tif_clientdata, module, +"Read error at row %lu, col %lu, tile %lu; got %llu bytes, expected %llu", + (unsigned long) tif->tif_row, + (unsigned long) tif->tif_col, + (unsigned long) tile, + (unsigned long long) n, + (unsigned long long) size); +#endif + return ((tmsize_t)(-1)); + } + _TIFFmemcpy(buf, tif->tif_base + ma, size); + } + return (size); +} + +/* + * Read a tile of data from the file. + */ +tmsize_t +TIFFReadRawTile(TIFF* tif, uint32 tile, void* buf, tmsize_t size) +{ + static const char module[] = "TIFFReadRawTile"; + TIFFDirectory *td = &tif->tif_dir; + uint64 bytecount64; + tmsize_t bytecountm; + + if (!TIFFCheckRead(tif, 1)) + return ((tmsize_t)(-1)); + if (tile >= td->td_nstrips) { + TIFFErrorExt(tif->tif_clientdata, module, + "%lu: Tile out of range, max %lu", + (unsigned long) tile, (unsigned long) td->td_nstrips); + return ((tmsize_t)(-1)); + } + if (tif->tif_flags&TIFF_NOREADRAW) + { + TIFFErrorExt(tif->tif_clientdata, module, + "Compression scheme does not support access to raw uncompressed data"); + return ((tmsize_t)(-1)); + } + bytecount64 = td->td_stripbytecount[tile]; + if (size != (tmsize_t)(-1) && (uint64)size < bytecount64) + bytecount64 = (uint64)size; + bytecountm = (tmsize_t)bytecount64; + if ((uint64)bytecountm!=bytecount64) + { + TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); + return ((tmsize_t)(-1)); + } + return (TIFFReadRawTile1(tif, tile, buf, bytecountm, module)); +} + +/* + * Read the specified tile and setup for decoding. The data buffer is + * expanded, as necessary, to hold the tile's data. + */ +int +TIFFFillTile(TIFF* tif, uint32 tile) +{ + static const char module[] = "TIFFFillTile"; + TIFFDirectory *td = &tif->tif_dir; + + if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount) + return 0; + + if ((tif->tif_flags&TIFF_NOREADRAW)==0) + { + uint64 bytecount = td->td_stripbytecount[tile]; + if ((int64)bytecount <= 0) { +#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) + TIFFErrorExt(tif->tif_clientdata, module, + "%I64u: Invalid tile byte count, tile %lu", + (unsigned __int64) bytecount, + (unsigned long) tile); +#else + TIFFErrorExt(tif->tif_clientdata, module, + "%llu: Invalid tile byte count, tile %lu", + (unsigned long long) bytecount, + (unsigned long) tile); +#endif + return (0); + } + if (isMapped(tif) && + (isFillOrder(tif, td->td_fillorder) + || (tif->tif_flags & TIFF_NOBITREV))) { + /* + * The image is mapped into memory and we either don't + * need to flip bits or the compression routine is + * going to handle this operation itself. In this + * case, avoid copying the raw data and instead just + * reference the data from the memory mapped file + * image. This assumes that the decompression + * routines do not modify the contents of the raw data + * buffer (if they try to, the application will get a + * fault since the file is mapped read-only). + */ + if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) { + _TIFFfree(tif->tif_rawdata); + tif->tif_rawdata = NULL; + tif->tif_rawdatasize = 0; + } + tif->tif_flags &= ~TIFF_MYBUFFER; + /* + * We must check for overflow, potentially causing + * an OOB read. Instead of simple + * + * td->td_stripoffset[tile]+bytecount > tif->tif_size + * + * comparison (which can overflow) we do the following + * two comparisons: + */ + if (bytecount > (uint64)tif->tif_size || + td->td_stripoffset[tile] > (uint64)tif->tif_size - bytecount) { + tif->tif_curtile = NOTILE; + return (0); + } + tif->tif_rawdatasize = (tmsize_t)bytecount; + tif->tif_rawdata = + tif->tif_base + (tmsize_t)td->td_stripoffset[tile]; + tif->tif_rawdataoff = 0; + tif->tif_rawdataloaded = (tmsize_t) bytecount; + tif->tif_flags |= TIFF_BUFFERMMAP; + } else { + /* + * Expand raw data buffer, if needed, to hold data + * tile coming from file (perhaps should set upper + * bound on the size of a buffer we'll use?). + */ + tmsize_t bytecountm; + bytecountm=(tmsize_t)bytecount; + if ((uint64)bytecountm!=bytecount) + { + TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); + return(0); + } + if (bytecountm > tif->tif_rawdatasize) { + tif->tif_curtile = NOTILE; + if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { + TIFFErrorExt(tif->tif_clientdata, module, + "Data buffer too small to hold tile %lu", + (unsigned long) tile); + return (0); + } + if (!TIFFReadBufferSetup(tif, 0, bytecountm)) + return (0); + } + if (tif->tif_flags&TIFF_BUFFERMMAP) { + tif->tif_curtile = NOTILE; + if (!TIFFReadBufferSetup(tif, 0, bytecountm)) + return (0); + } + + if (TIFFReadRawTile1(tif, tile, tif->tif_rawdata, + bytecountm, module) != bytecountm) + return (0); + + tif->tif_rawdataoff = 0; + tif->tif_rawdataloaded = bytecountm; + + if (!isFillOrder(tif, td->td_fillorder) && + (tif->tif_flags & TIFF_NOBITREV) == 0) + TIFFReverseBits(tif->tif_rawdata, + tif->tif_rawdataloaded); + } + } + return (TIFFStartTile(tif, tile)); +} + +/* + * Setup the raw data buffer in preparation for + * reading a strip of raw data. If the buffer + * is specified as zero, then a buffer of appropriate + * size is allocated by the library. Otherwise, + * the client must guarantee that the buffer is + * large enough to hold any individual strip of + * raw data. + */ +int +TIFFReadBufferSetup(TIFF* tif, void* bp, tmsize_t size) +{ + static const char module[] = "TIFFReadBufferSetup"; + + assert((tif->tif_flags&TIFF_NOREADRAW)==0); + tif->tif_flags &= ~TIFF_BUFFERMMAP; + + if (tif->tif_rawdata) { + if (tif->tif_flags & TIFF_MYBUFFER) + _TIFFfree(tif->tif_rawdata); + tif->tif_rawdata = NULL; + tif->tif_rawdatasize = 0; + } + if (bp) { + tif->tif_rawdatasize = size; + tif->tif_rawdata = (uint8*) bp; + tif->tif_flags &= ~TIFF_MYBUFFER; + } else { + tif->tif_rawdatasize = (tmsize_t)TIFFroundup_64((uint64)size, 1024); + if (tif->tif_rawdatasize==0) { + TIFFErrorExt(tif->tif_clientdata, module, + "Invalid buffer size"); + return (0); + } + tif->tif_rawdata = (uint8*) _TIFFmalloc(tif->tif_rawdatasize); + tif->tif_flags |= TIFF_MYBUFFER; + } + if (tif->tif_rawdata == NULL) { + TIFFErrorExt(tif->tif_clientdata, module, + "No space for data buffer at scanline %lu", + (unsigned long) tif->tif_row); + tif->tif_rawdatasize = 0; + return (0); + } + return (1); +} + +/* + * Set state to appear as if a + * strip has just been read in. + */ +static int +TIFFStartStrip(TIFF* tif, uint32 strip) +{ + TIFFDirectory *td = &tif->tif_dir; + + if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount) + return 0; + + if ((tif->tif_flags & TIFF_CODERSETUP) == 0) { + if (!(*tif->tif_setupdecode)(tif)) + return (0); + tif->tif_flags |= TIFF_CODERSETUP; + } + tif->tif_curstrip = strip; + tif->tif_row = (strip % td->td_stripsperimage) * td->td_rowsperstrip; + tif->tif_flags &= ~TIFF_BUF4WRITE; + + if (tif->tif_flags&TIFF_NOREADRAW) + { + tif->tif_rawcp = NULL; + tif->tif_rawcc = 0; + } + else + { + tif->tif_rawcp = tif->tif_rawdata; + tif->tif_rawcc = (tmsize_t)td->td_stripbytecount[strip]; + } + return ((*tif->tif_predecode)(tif, + (uint16)(strip / td->td_stripsperimage))); +} + +/* + * Set state to appear as if a + * tile has just been read in. + */ +static int +TIFFStartTile(TIFF* tif, uint32 tile) +{ + TIFFDirectory *td = &tif->tif_dir; + + if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount) + return 0; + + if ((tif->tif_flags & TIFF_CODERSETUP) == 0) { + if (!(*tif->tif_setupdecode)(tif)) + return (0); + tif->tif_flags |= TIFF_CODERSETUP; + } + tif->tif_curtile = tile; + tif->tif_row = + (tile % TIFFhowmany_32(td->td_imagewidth, td->td_tilewidth)) * + td->td_tilelength; + tif->tif_col = + (tile % TIFFhowmany_32(td->td_imagelength, td->td_tilelength)) * + td->td_tilewidth; + tif->tif_flags &= ~TIFF_BUF4WRITE; + if (tif->tif_flags&TIFF_NOREADRAW) + { + tif->tif_rawcp = NULL; + tif->tif_rawcc = 0; + } + else + { + tif->tif_rawcp = tif->tif_rawdata; + tif->tif_rawcc = (tmsize_t)td->td_stripbytecount[tile]; + } + return ((*tif->tif_predecode)(tif, + (uint16)(tile/td->td_stripsperimage))); +} + +static int +TIFFCheckRead(TIFF* tif, int tiles) +{ + if (tif->tif_mode == O_WRONLY) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "File not open for reading"); + return (0); + } + if (tiles ^ isTiled(tif)) { + TIFFErrorExt(tif->tif_clientdata, tif->tif_name, tiles ? + "Can not read tiles from a stripped image" : + "Can not read scanlines from a tiled image"); + return (0); + } + return (1); +} + +void +_TIFFNoPostDecode(TIFF* tif, uint8* buf, tmsize_t cc) +{ + (void) tif; (void) buf; (void) cc; +} + +void +_TIFFSwab16BitData(TIFF* tif, uint8* buf, tmsize_t cc) +{ + (void) tif; + assert((cc & 1) == 0); + TIFFSwabArrayOfShort((uint16*) buf, cc/2); +} + +void +_TIFFSwab24BitData(TIFF* tif, uint8* buf, tmsize_t cc) +{ + (void) tif; + assert((cc % 3) == 0); + TIFFSwabArrayOfTriples((uint8*) buf, cc/3); +} + +void +_TIFFSwab32BitData(TIFF* tif, uint8* buf, tmsize_t cc) +{ + (void) tif; + assert((cc & 3) == 0); + TIFFSwabArrayOfLong((uint32*) buf, cc/4); +} + +void +_TIFFSwab64BitData(TIFF* tif, uint8* buf, tmsize_t cc) +{ + (void) tif; + assert((cc & 7) == 0); + TIFFSwabArrayOfDouble((double*) buf, cc/8); +} + +/* vim: set ts=8 sts=8 sw=8 noet: */ +/* + * Local Variables: + * mode: c + * c-basic-offset: 8 + * fill-column: 78 + * End: + */ |