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test_IFD_enlargement.c
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/*
* TIFF Library
*
* The purpose of this test file is to test the correctness of
* TIFFWriteDirectory() when an already written IFD is extended with additional
* tags or the IFD data size is increased. The IFD must then be re-written to a
* different location in the file. On the other hand, the IFD should be
* overwritten if its size has not grown.
*/
#include "tif_config.h"
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tiffio.h"
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
#ifndef TIFFmin
#define TIFFmax(A, B) ((A) > (B) ? (A) : (B))
#define TIFFmin(A, B) ((A) < (B) ? (A) : (B))
#endif
/* Global settings -not save to change- */
#define SPP 3 /* samples per pixel */
#define BPS 8 /* bits per sample */
char *modeStrings[] = {"wl", "wb", "w8l", "w8b"};
/* Writes some pixel data as scanline or tiles to file.
*/
int write_image_data(TIFF *tif, uint16_t width, uint16_t length, bool tiled,
unsigned int pixval, unsigned char *plastlinedata,
unsigned int lastlinebytesmax)
{
size_t bufLen;
unsigned char *pbufLine = NULL;
unsigned int bpsmod = (1 << BPS);
int tlwidth;
int tllength;
tmsize_t tlsize;
assert(SPP == 3);
if (tiled)
{
int ret = TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tlwidth);
ret += TIFFGetField(tif, TIFFTAG_TILELENGTH, &tllength);
if (ret < 2)
{
fprintf(stderr,
"Can't get TIFFTAG_TILEWIDTH/_LENGTH tags. Testline %d\n",
__LINE__);
return 1;
}
/* For tiled mode get size of a tile in bytes */
tlsize = TIFFTileSize(tif);
bufLen = (size_t)tlsize;
}
else
{
/* For strip mode get size of a row in bytes */
bufLen = (((size_t)width * SPP * BPS) + 7) / 8;
}
pbufLine = _TIFFmalloc(bufLen);
if (pbufLine == NULL)
return 1;
/* Fill image buffer. */
pbufLine[0] = (unsigned char)((pixval * 100) % bpsmod);
pbufLine[1] = 127 % bpsmod;
pbufLine[2] = 255 % bpsmod;
for (size_t x = SPP; x < bufLen; x += SPP)
{
pbufLine[x] = 10 % bpsmod;
pbufLine[x + 1] = (unsigned char)((x * 40) % bpsmod);
pbufLine[x + 2] = (unsigned char)((x * 70) % bpsmod);
}
/* Write dummy pixel data. */
if (tiled)
{
uint32_t numtiles = TIFFNumberOfTiles(tif);
for (uint32_t i = 0; i < numtiles; i++)
{
if (TIFFWriteEncodedTile(tif, i, pbufLine, 0) == -1)
{
fprintf(stderr, "Can't write image data tile. Testline %d\n",
__LINE__);
return 1;
}
if ((plastlinedata != NULL) && (i == (numtiles - 1)))
{
memcpy(plastlinedata, pbufLine,
TIFFmin(bufLen, (size_t)lastlinebytesmax));
}
/* Change something for next row. */
pbufLine[0] = (pbufLine[0] + 35) % bpsmod;
}
}
else
{
for (int i = 0; i < length; i++)
{
if (TIFFWriteScanline(tif, pbufLine, i, 0) == -1)
{
fprintf(stderr,
"Can't write image data scanline. Testline %d\n",
__LINE__);
return 1;
}
if ((plastlinedata != NULL) && (i == (length - 1)))
{
memcpy(plastlinedata, pbufLine,
TIFFmin(bufLen, (size_t)lastlinebytesmax));
}
/* Change something for next row. */
pbufLine[0] = (pbufLine[0] + 30) % bpsmod;
}
}
_TIFFfree(pbufLine);
return 0;
} /*-- write_image_data() --*/
/* Fills the active IFD with some default values and writes
* an image with given number of lines as strips (scanlines) or tiles to file.
*/
int write_data_to_current_directory(TIFF *tif, uint16_t width, uint16_t length,
bool tiled, int ifd_page_num,
bool write_data,
unsigned char *plastlinedata,
unsigned int lastlinebytesmax)
{
const uint16_t photometric = PHOTOMETRIC_RGB;
const uint16_t rows_per_strip = 1;
const uint16_t planarconfig = PLANARCONFIG_CONTIG;
char auxString[128];
if (!tif)
{
fprintf(stderr, "Invalid TIFF handle.\n");
return 1;
}
if (!TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, width))
{
fprintf(stderr, "Can't set ImageWidth tag.\n");
return 1;
}
if (!TIFFSetField(tif, TIFFTAG_IMAGELENGTH, length))
{
fprintf(stderr, "Can't set ImageLength tag.\n");
return 1;
}
if (!TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, BPS))
{
fprintf(stderr, "Can't set BitsPerSample tag.\n");
return 1;
}
if (!TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, SPP))
{
fprintf(stderr, "Can't set SamplesPerPixel tag.\n");
return 1;
}
if (tiled)
{
/* Tilesizes must be multiple of 16. */
int ret = TIFFSetField(tif, TIFFTAG_TILEWIDTH, 16);
ret += TIFFSetField(tif, TIFFTAG_TILELENGTH, 16);
if (ret < 2)
{
fprintf(stderr, "Can't set TIFFTAG_TILEWIDTH/_LENGTH tags.\n");
return 1;
}
}
else
{
if (!TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, rows_per_strip))
{
fprintf(stderr, "Can't set SamplesPerPixel tag.\n");
return 1;
}
}
if (!TIFFSetField(tif, TIFFTAG_PLANARCONFIG, planarconfig))
{
fprintf(stderr, "Can't set PlanarConfiguration tag.\n");
return 1;
}
if (!TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, photometric))
{
fprintf(stderr, "Can't set PhotometricInterpretation tag.\n");
return 1;
}
/* Write IFD identification number to ASCII string of PageName tag. */
sprintf(auxString, "%d th. IFD", ifd_page_num);
if (!TIFFSetField(tif, TIFFTAG_PAGENAME, auxString))
{
fprintf(stderr, "Can't set TIFFTAG_PAGENAME tag.\n");
return 1;
}
/* Write dummy pixel data. */
if (write_data)
{
if (write_image_data(tif, width, length, tiled, ifd_page_num,
plastlinedata, lastlinebytesmax))
{
fprintf(stderr, "Can't write image data. Testline %d\n", __LINE__);
return 1;
}
}
return 0;
} /*-- write_data_to_current_directory() --*/
/* Adds an EXIF IFD with some default values to the active IFD.
*/
int write_EXIF_data_to_current_directory(TIFF *tif, int i,
uint64_t *dir_offset_EXIF)
{
char auxString[128];
if (!tif)
{
fprintf(stderr, "Invalid TIFF handle.\n");
return 1;
}
/*-- Now create an EXIF directory. */
if (TIFFCreateEXIFDirectory(tif) != 0)
{
fprintf(stderr, "TIFFCreateEXIFDirectory() failed.\n");
return 1;
}
if (!TIFFSetField(tif, EXIFTAG_EXIFVERSION, "0231"))
{
fprintf(stderr, "Can't write EXIFTAG_EXIFVERSION\n");
return 1;
}
/* Write IFD identification number to ASCII string of SUBSECTIMEORIGINAL
* tag. */
sprintf(auxString, "EXIF-%d-EXIF", i);
if (!TIFFSetField(tif, EXIFTAG_SUBSECTIMEORIGINAL, auxString))
{
fprintf(stderr, "Can't set EXIFTAG_SUBSECTIMEORIGINAL tag.\n");
return 1;
}
if (!TIFFWriteCustomDirectory(tif, dir_offset_EXIF))
{
fprintf(stderr, "TIFFWriteCustomDirectory() with EXIF failed.\n");
return 1;
}
return 0;
} /*-- write_EXIF_data_to_current_directory() --*/
/* Compare 'requested_dir_number' with number written in PageName tag
* into the IFD to identify that IFD. */
int is_requested_directory(TIFF *tif, int requested_dir_number,
const char *filename)
{
char *ptr = NULL;
char *auxStr = NULL;
if (!TIFFGetField(tif, TIFFTAG_PAGENAME, &ptr))
{
fprintf(stderr, "Can't get TIFFTAG_PAGENAME tag. Testline %d\n",
__LINE__);
return 0;
}
/* Check for reading errors */
if (ptr != NULL)
auxStr = strchr(ptr, ' ');
if (ptr == NULL || auxStr == NULL || strncmp(auxStr, " th.", 4))
{
ptr = ptr == NULL ? "(null)" : ptr;
fprintf(stderr,
"Error reading IFD directory number from PageName tag: %s. "
"Testline %d\n",
ptr, __LINE__);
return 0;
}
/* Retrieve IFD identification number from ASCII string */
const int nthIFD = atoi(ptr);
if (nthIFD == requested_dir_number)
{
return 1;
}
fprintf(
stderr,
"Expected directory %d from %s was not loaded but: %s. Testline %d\n",
requested_dir_number, filename, ptr, __LINE__);
return 0;
}
/* Checks that IFDs on file can be overwritten if they have not grown and
* were re-written to an other location if IFD size has been grown.
*/
int test_IFD_enlargement(const char *filename, unsigned int openMode,
bool is_strile_array_writing, int numIFDs,
uint16_t width, uint16_t length, bool tiled)
{
#define NUMIFDsMAX 4
uint64_t auxUint64;
TIFFErrorHandler errHandler = NULL;
uint64_t offsetBase[NUMIFDsMAX] = {0};
uint64_t offsetNew[NUMIFDsMAX];
unsigned char bufLine[NUMIFDsMAX + 1][1024];
assert(numIFDs <= NUMIFDsMAX);
assert(openMode < (sizeof(modeStrings) / sizeof(modeStrings[0])));
/*-- Create a file and write numIFDs IFDs directly to it --*/
TIFF *tif = TIFFOpen(filename, modeStrings[openMode]);
if (!tif)
{
fprintf(stderr, "Can't create %s. Testline %d\n", filename, __LINE__);
return 1;
}
for (int i = 0; i < numIFDs; i++)
{
/* Writing baseline images (IFDs) to file. */
if (write_data_to_current_directory(tif, width, length, tiled, i,
!is_strile_array_writing,
&bufLine[i][0], sizeof(bufLine[i])))
{
fprintf(
stderr,
"Can't write data to current directory in %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
/* xmldata need to be 9 bytes (17 bytes for BigTIFF, respectively) thus
* not to fit into the entry itself and have space to cover two
* strip-/tile-offsets when XMLPACKET tag contents is reduced. */
char xmldata[20];
if (TIFFIsBigTIFF(tif))
strcpy(xmldata, "XML-ABCDEABCDEFGH");
else
strcpy(xmldata, "XML-ABCDE");
uint32_t xmlpacketLength = (uint32_t)strlen(xmldata);
if (!TIFFSetField(tif, TIFFTAG_XMLPACKET, xmlpacketLength, xmldata))
{
fprintf(stderr, "Can't set TIFFTAG_XMLPACKET tag. Testline %d\n",
__LINE__);
goto failure;
}
if (is_strile_array_writing)
{
/* Set flag for deferred strile-array writing. */
if (!TIFFDeferStrileArrayWriting(tif))
{
fprintf(
stderr,
"TIFFDeferStrileArrayWriting failed for %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
/* Set flag, that image writing has started and freeze relevant IFD
* tags. */
if (!TIFFWriteCheck(tif, tiled, NULL))
{
fprintf(stderr, "TIFFWriteCheck failed for %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
}
/* Write IFD tags to file (and setup new empty IFD). */
if (!TIFFWriteDirectory(tif))
{
fprintf(stderr, "Can't write directory to %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
} /*-- for (numIFDs) --*/
/* Retrieve IFD offset values to read IFDs before image data has been
* written when is_strile_array_writing is true. */
for (int i = numIFDs - 1; i >= 0; i--)
{
TIFFSetDirectory(tif, i);
offsetBase[i] = TIFFCurrentDirOffset(tif);
}
/* For TIFFDeferStrileArrayWriting write now image data to file.*/
if (is_strile_array_writing)
{
for (int i = 0; i < numIFDs; i++)
{
/* Reset to written IFD to write strile arrays with dummy content to
* file and update StripOffset tag within IFD on file.
* First TIFFForceStrileArrayWriting() prepares internal flags and
* memory for next writing after switching back to the already
* written IFD. */
TIFFSetDirectory(tif, i);
if (!TIFFForceStrileArrayWriting(tif))
{
fprintf(
stderr,
"TIFFForceStrileArrayWriting failed for %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
/* Then write image pixels. */
if (write_image_data(tif, width, length, tiled, 5 * i,
&bufLine[i][0], sizeof(bufLine[i])))
{
fprintf(stderr, "Can't write image data. Testline %d\n",
__LINE__);
return 1;
}
/* Last image data need to be flushed to file. */
if (!TIFFFlushData(tif))
{
fprintf(stderr, "TIFFFlushData failed for %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
/* Fill (overwrite) strile array with final offsets after image data
* has been written. Would also be called by TIFFClose(). */
if (!TIFFForceStrileArrayWriting(tif))
{
fprintf(
stderr,
"TIFFForceStrileArrayWriting failed for %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
}
}
/* Retrieve IFD offset values for later checking. Should not be changed. */
for (int i = numIFDs - 1; i >= 0; i--)
{
TIFFSetDirectory(tif, i);
auxUint64 = TIFFCurrentDirOffset(tif);
if (offsetBase[i] != auxUint64)
{
fprintf(stderr, "Unexpected change of offset IFD %d. Testline %d\n",
i, __LINE__);
goto failure;
}
}
/* Test over-writing with less bytes.
* This leaves some bytes of the larger previous IFD at EOF or before the
* next IFD. */
TIFFSetDirectory(tif, 0);
char xmldata0[] = "XMLb";
uint32_t xmlpacketLength = (uint32_t)strlen(xmldata0);
if (!TIFFSetField(tif, TIFFTAG_XMLPACKET, xmlpacketLength, xmldata0))
{
fprintf(stderr, "Can't set TIFFTAG_XMLPACKET tag. Testline %d\n",
__LINE__);
goto failure;
}
if (!TIFFWriteDirectory(tif))
{
fprintf(stderr, "Can't overwrite directory to %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
/* Re-read IFD and check its offset, which should not have been changed at
* this point, except for strile_array_writing because then the stripoffsets
* are now written within IFD space. However, for only one IFD (numIFDs=1)
* the strile array data is written straight behind the IFD and thus can be
* overwritten.
* Furthermore, strile_array size of <= 9 (<=17 for BigTIFF) can also be
* written within the IFD space, because 9 (17 for BigTIFF) byte are gained
* by downsizing the XMLPACKET. */
TIFFSetDirectory(tif, 0);
auxUint64 = TIFFCurrentDirOffset(tif);
if (!is_strile_array_writing && offsetBase[0] != auxUint64)
{
fprintf(stderr,
"Failure: Directory 0 offset has changed from 0x%" PRIx64
" (%" PRIu64 ") to 0x %" PRIx64 " (%" PRIu64
"). Testline %d\n ",
offsetBase[0], offsetBase[0], auxUint64, auxUint64, __LINE__);
goto failure;
}
else if (is_strile_array_writing && !tiled)
{
if (numIFDs > 1 && TIFFNumberOfStrips(tif) > 2)
{
if (offsetBase[0] == auxUint64)
{
fprintf(stderr,
"Failure with strile array writing: Directory 0 offset "
"has now "
"NOT changed from 0x%" PRIx64 " (%" PRIu64
"). Testline %d\n ",
offsetBase[0], offsetBase[0], __LINE__);
goto failure;
}
}
else if (offsetBase[0] != auxUint64)
{
fprintf(stderr,
"Failure with strile array writing: Directory 0 offset has "
"changed from 0x%" PRIx64 " (%" PRIu64 ") to 0x %" PRIx64
" (%" PRIu64 "). Testline %d\n ",
offsetBase[0], offsetBase[0], auxUint64, auxUint64,
__LINE__);
goto failure;
}
}
else if (is_strile_array_writing && tiled)
{
if (numIFDs > 1 && TIFFNumberOfTiles(tif) > 2)
{
if (offsetBase[0] == auxUint64)
{
fprintf(stderr,
"Failure with tiled strile array writing: Directory 0 "
"offset has now NOT changed from 0x%" PRIx64
" (%" PRIu64 "). Testline %d\n ",
offsetBase[0], offsetBase[0], __LINE__);
goto failure;
}
}
else if (offsetBase[0] != auxUint64)
{
fprintf(stderr,
"Failure with tiled strile array writing: Directory 0 "
"offset has "
"changed from 0x%" PRIx64 " (%" PRIu64 ") to 0x %" PRIx64
" (%" PRIu64 "). Testline %d\n ",
offsetBase[0], offsetBase[0], auxUint64, auxUint64,
__LINE__);
goto failure;
}
}
/*-- Enlarge IFD 0 with enlarged tag data and write it again. --*/
char xmldata1[] = "XML data package";
xmlpacketLength = (uint32_t)strlen(xmldata1);
if (!TIFFSetField(tif, TIFFTAG_XMLPACKET, xmlpacketLength, xmldata1))
{
fprintf(stderr, "Can't set TIFFTAG_XMLPACKET tag. Testline %d\n",
__LINE__);
goto failure;
}
if (!TIFFWriteDirectory(tif))
{
fprintf(stderr, "Can't re-write directory 0 to %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
/* Check IFD 0 offset, which should have been changed.
* (Because of unused bytes before EOF generated by downsizing of XMLPACKET
* before enlarging IFD will be re-written even for numIFDs==1) */
if (!TIFFSetDirectory(tif, 0))
{
fprintf(stderr, "Can't set directory 0 of %s. Testline %d\n", filename,
__LINE__);
goto failure;
}
offsetNew[0] = TIFFCurrentDirOffset(tif);
if (offsetBase[0] == offsetNew[0])
{
fprintf(
stderr,
"Failure: Directory 0 offset has now NOT changed from 0x%" PRIx64
" (%" PRIu64 ").Testline %d\n ",
offsetNew[0], offsetNew[0], __LINE__);
goto failure;
}
if (numIFDs > 1)
{
/*-- Read next directory IFD=1 and re-write that. --*/
if (!TIFFReadDirectory(tif))
{
fprintf(stderr, "Can't read directory from %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
/* Enlarge IFD 1 by adding new tag. */
if (!TIFFSetField(tif, TIFFTAG_IMAGEDESCRIPTION,
"WGS 84 / UTM zone 1N|WGS 84|"))
{
fprintf(stderr,
"Can't set TIFFTAG_IMAGEDESCRIPTION tag. Testline %d\n",
__LINE__);
goto failure;
}
auxUint64 = TIFFCurrentDirOffset(tif);
if (!TIFFWriteDirectory(tif))
{
fprintf(stderr, "Can't re-write directory 1 to %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
TIFFSetDirectory(tif, 1);
offsetNew[1] = TIFFCurrentDirOffset(tif);
if (auxUint64 == offsetNew[1])
{
fprintf(stderr,
"Failure: Directory 1 offset has now NOT changed from "
"0x%" PRIx64 " (%" PRIu64 ").Testline %d\n ",
offsetNew[1], offsetNew[1], __LINE__);
goto failure;
}
}
/* Use TIFFSetSubDirectory() for old IFD 0 and just overwrite it.
* Just overwriting invalid directory works. For strile array writing it
* shall fail, because now the striles are tried to be written within the
* IFD space. However, for only one IFD (numIFDs=1) the strile array data is
* written straight behind the IFD and thus can be overwritten.
* The same is true for tiled images, however if the number of tiles
* is one (TIFFNumberOfTiles==1), the tile offset fits into the tag entry
* and thus can also be overwritten.
*/
if (!TIFFSetSubDirectory(tif, offsetBase[0]))
{
fprintf(stderr,
"Can't set sub-directory at offset 0x%" PRIx64 " (%" PRIu64
") within %s. Testline %d\n",
offsetBase[0], offsetBase[0], filename, __LINE__);
goto failure;
}
if (!tiled)
{
if (!is_strile_array_writing || numIFDs <= 1)
{
if (!TIFFWriteDirectory(
tif)) /* just overwriting invalid directory works!!*/
{
fprintf(stderr,
"Can't overwrite directory to %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
}
else
{
/* Because XMLPACKET is 9 byte reduced, small strilearrays can be
* overwritten. */
if (TIFFNumberOfStrips(tif) > 2)
/* Suppress error message from 'TIFFRewriteDirectory()' like
* 'Error fetching directory link' or 'Sanity check...'. */
errHandler = TIFFSetErrorHandler(NULL);
if (TIFFWriteDirectory(tif) && TIFFNumberOfStrips(tif) > 2)
{
fprintf(stderr,
"Was expected to fail but succeeded. %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
if (TIFFNumberOfStrips(tif) > 2)
TIFFSetErrorHandler(errHandler);
}
}
else
{
if (!is_strile_array_writing || numIFDs <= 1 ||
TIFFNumberOfTiles(tif) <= 1)
{
if (!TIFFWriteDirectory(
tif)) /* just overwriting invalid directory works!!*/
{
fprintf(stderr,
"Can't overwrite directory to %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
}
else
{
/* Because XMLPACKET is 9 byte reduced, small strilearrays can be
* overwritten. */
if (TIFFNumberOfTiles(tif) > 2)
/* Suppress error message from 'TIFFRewriteDirectory()' like
* 'Error fetching directory link' or 'Sanity check...'. */
errHandler = TIFFSetErrorHandler(NULL);
if (TIFFWriteDirectory(tif) && TIFFNumberOfTiles(tif) > 2)
{
fprintf(stderr,
"Was expected to fail but succeeded. %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
if (TIFFNumberOfTiles(tif) > 2)
TIFFSetErrorHandler(errHandler);
}
}
/* Re-read the already re-written and thus invalidated IFD 0 with
* TIFFSetSubDirectory() and try to re-write it.
* Re-writing an invalid IFD should fail. */
if (!TIFFSetSubDirectory(tif, offsetBase[0]))
{
fprintf(stderr,
"Can't set sub-directory at offset 0x%" PRIx64 " (%" PRIu64
") within %s. Testline %d\n",
offsetBase[0], offsetBase[0], filename, __LINE__);
goto failure;
}
if (!TIFFSetField(tif, TIFFTAG_XMLPACKET, (uint32_t)strlen(xmldata1),
xmldata1))
{
fprintf(stderr, "Can't set TIFFTAG_XMLPACKET tag. Testline %d\n",
__LINE__);
goto failure;
}
/* Suppress error message from 'TIFFRewriteDirectory()' like
* 'Error fetching directory link' or 'Sanity check...'. */
errHandler = TIFFSetErrorHandler(NULL);
if (TIFFWriteDirectory(tif))
{
fprintf(stderr, "Was expected to fail but succeeded. %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
TIFFSetErrorHandler(errHandler);
/*-- Now with a valid IFD: Re-read IFD with TIFFSetSubDirectory() and
* re-write it. If it is at the end of the file, it will be overwritten.
* This is the case for numIFD==1. */
if (!TIFFSetSubDirectory(tif, offsetNew[0]))
{
fprintf(stderr,
"Can't set sub-directory at offset 0x%" PRIx64 " (%" PRIu64
") within %s. Testline %d\n",
offsetNew[0], offsetNew[0], filename, __LINE__);
goto failure;
}
char xmldata2[] = "XML data package even longer";
if (!TIFFSetField(tif, TIFFTAG_XMLPACKET, (uint32_t)strlen(xmldata2),
xmldata2))
{
fprintf(stderr, "Can't set TIFFTAG_XMLPACKET tag.. Testline %d\n",
__LINE__);
goto failure;
}
auxUint64 = TIFFCurrentDirOffset(tif);
if (!TIFFWriteDirectory(tif))
{
fprintf(stderr, "Can't re-write directory 0 to %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
TIFFSetDirectory(tif, 0);
offsetNew[0] = TIFFCurrentDirOffset(tif);
if (numIFDs > 1 && auxUint64 == offsetNew[0])
{
fprintf(stderr,
"Failure: Directory %d offset has NOT changed from 0x%" PRIx64
" (%" PRIu64 ").Testline %d\n ",
0, offsetNew[0], offsetNew[0], __LINE__);
goto failure;
}
/*-- Make a little check. --*/
/* Reopen prepared testfile */
TIFFClose(tif);
tif = TIFFOpen(filename, "r+");
if (!tif)
{
fprintf(stderr, "Can't open %s\n", filename);
goto failure;
}
for (int i = 0; i < numIFDs; i++)
{
if (!TIFFSetDirectory(tif, i))
{
fprintf(stderr, "Can't set directory %d of %s. Testline %d\n", i,
filename, __LINE__);
goto failure;
}
if (i < 2)
{
auxUint64 = TIFFCurrentDirOffset(tif);
if (auxUint64 != offsetNew[i])
{
fprintf(
stderr,
"Failure: Directory 0 offset has changed from 0x%" PRIx64
" (%" PRIu64 ") to 0x %" PRIx64 " (%" PRIu64
").Testline %d\n ",
offsetNew[i], offsetNew[i], auxUint64, auxUint64, __LINE__);
goto failure;
}
}
if (!is_requested_directory(tif, i, filename))
{
goto failure;
}
/* Check last image line or last tile. */
tmsize_t bytesRead;
if (tiled)
{
uint32_t numtiles = TIFFNumberOfTiles(tif);
uint64_t tileSize = TIFFTileSize64(tif);
if (tileSize > sizeof(bufLine[NUMIFDsMAX]))
{
fprintf(
stderr,
"Failure: Read buffer for tile too small.Testline %d\n ",
__LINE__);
goto failure;
}
bytesRead = TIFFReadEncodedTile(
tif, numtiles - 1, &bufLine[NUMIFDsMAX][0], sizeof(bufLine[0]));
}
else
{
uint64_t scanlineSize = TIFFScanlineSize64(tif);
if (scanlineSize > sizeof(bufLine[NUMIFDsMAX]))
{
fprintf(stderr,
"Failure: Read buffer for scanline too small.Testline "
"%d\n ",
__LINE__);
goto failure;
}
bytesRead =
TIFFReadScanline(tif, &bufLine[NUMIFDsMAX][0], length - 1, 0);
}
if (bytesRead > 0)
{
for (int k = 0; k < bytesRead; k++)
{
if (bufLine[NUMIFDsMAX][k] != bufLine[i][k])
{
fprintf(
stderr,
"Failure: Read IFD %d last line pixel %d value %d is "
"different to written value %d .Testline %d\n ",
i, k, bufLine[i][k], bufLine[NUMIFDsMAX][k], __LINE__);
goto failure;
}
}
}
else
{
fprintf(stderr,
"Failure: Reading IFD %d last line %d .Testline %d\n ", i,
length - 1, __LINE__);
goto failure;
}
}
TIFFClose(tif);
unlink(filename);
return 0;
failure:
if (tif)
{
TIFFClose(tif);
}
return 1;
} /*-- test_IFD_enlargement --*/
/* Width and length for the next test functions can be adapted here. */
#define WIDTH 1
#define LENGTH 2
/* Checks that Custom-IFDs like EXIF-IFD in file can be overwritten if they have
* not grown and were re-written to an other location if IFD size has been
* grown.
*/
int test_EXIF_enlargement(const char *filename, bool is_big_tiff)
{
char auxString[128];
uint64_t offsetEXIFBase[2];
uint64_t offsetEXIFNew[2];
/*-- Create a file and write two EXIF-IFDs directly to it --*/
TIFF *tif = TIFFOpen(filename, is_big_tiff ? "w8" : "w");
if (!tif)
{
fprintf(stderr, "Can't create %s. Testline %d\n", filename, __LINE__);
return 1;
}
/* Write baseline test image. */
for (int i = 0; i < 2; i++)
{
/* Writing baseline images (IFDs) and EXIF-IFDs to file. */
if (write_data_to_current_directory(tif, WIDTH, LENGTH, FALSE, i, true,
NULL, 0))
{
fprintf(
stderr,
"Can't write data to current directory in %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
/* Set EXIFIFD tag with dummy value to reserve space in IFD. */
if (!TIFFSetField(tif, TIFFTAG_EXIFIFD, (uint64_t)0))
{
fprintf(stderr, "Can't set TIFFTAG_EXIFIFD tag. Testline %d\n",
__LINE__);
goto failure;
}
if (!TIFFWriteDirectory(tif))
{
fprintf(stderr, "Can't write directory to %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
if (write_EXIF_data_to_current_directory(tif, i, &offsetEXIFBase[i]))
{
fprintf(stderr,
"Can't write EXIF data to current directory in %s. "
"Testline %d\n",
filename, __LINE__);
goto failure;
}
/* Go back to current main-IFD and update EXIF-IFD offset. */
if (!TIFFSetDirectory(tif, i))
{
fprintf(stderr, "Can't set directory %d of %s. Testline %d\n", i,
filename, __LINE__);
goto failure;
}
if (!TIFFSetField(tif, TIFFTAG_EXIFIFD, offsetEXIFBase[i]))
{
fprintf(stderr, "Can't set TIFFTAG_EXIFIFD tag. Testline %d\n",
__LINE__);
goto failure;
}
if (!TIFFWriteDirectory(tif))
{
fprintf(stderr, "Can't write directory to %s. Testline %d\n",
filename, __LINE__);
goto failure;
}
}
/* Test over-writing the EXIF directory without change or with less bytes.
*/
int retCode;
char *pAscii0;
char *pAscii1;
if (!TIFFReadEXIFDirectory(tif, offsetEXIFBase[0]))
{
fprintf(stderr,
"Can't read EXIF directory at offset 0x%" PRIx64 " (%" PRIu64
") within %s. Testline %d\n",
offsetEXIFBase[0], offsetEXIFBase[0], filename, __LINE__);
goto failure;
}
retCode = TIFFGetField(tif, EXIFTAG_EXIFVERSION, &pAscii0);
retCode += TIFFGetField(tif, EXIFTAG_SUBSECTIMEORIGINAL, &pAscii1);
if (retCode != 2)
{
fprintf(stderr, "Can't read EXIF tags. Testline %d\n", __LINE__);
return 1;
}
/* Use shorter string thus EXIF-IFD should be overwritten. */
sprintf(auxString, "EXIF-%d-XX", 0);
if (!TIFFSetField(tif, EXIFTAG_SUBSECTIMEORIGINAL, auxString))
{
fprintf(stderr,
"Can't set EXIFTAG_SUBSECTIMEORIGINAL tag. Testline %d\n",
__LINE__);
return 1;
}
if (!TIFFWriteCustomDirectory(tif, &offsetEXIFNew[0]))
{
fprintf(stderr,
"TIFFWriteCustomDirectory() with EXIF failed. Testline %d\n",
__LINE__);
return 1;
}
/* Check for overwriting. */