/*
* Read the next TIFF directory from a file
* and convert it to the internal format.
* We read directories sequentially.
*/
static uint64
ReadDirectory(int fd, unsigned int ix, uint64 off)
{
uint16 dircount;
uint32 direntrysize;
void* dirmem = NULL;
uint64 nextdiroff = 0;
uint32 n;
uint8* dp;
if (off == 0) /* no more directories */
goto done;
if (_TIFF_lseek_f(fd, (_TIFF_off_t)off, SEEK_SET) != (_TIFF_off_t)off) {
Fatal("Seek error accessing TIFF directory");
goto done;
}
if (!bigtiff) {
if (read(fd, (char*) &dircount, sizeof (uint16)) != sizeof (uint16)) {
ReadError("directory count");
goto done;
}
if (swabflag)
TIFFSwabShort(&dircount);
direntrysize = 12;
} else {
uint64 dircount64 = 0;
if (read(fd, (char*) &dircount64, sizeof (uint64)) != sizeof (uint64)) {
ReadError("directory count");
goto done;
}
if (swabflag)
TIFFSwabLong8(&dircount64);
if (dircount64>0xFFFF) {
Error("Sanity check on directory count failed");
goto done;
}
dircount = (uint16)dircount64;
direntrysize = 20;
}
dirmem = _TIFFmalloc(TIFFSafeMultiply(tmsize_t,dircount,direntrysize));
if (dirmem == NULL) {
Fatal("No space for TIFF directory");
goto done;
}
n = read(fd, (char*) dirmem, dircount*direntrysize);
if (n != dircount*direntrysize) {
n /= direntrysize;
Error(
#if defined(__WIN32__) && defined(_MSC_VER)
"Could only read %lu of %u entries in directory at offset %#I64x",
(unsigned long)n, dircount, (unsigned __int64) off);
#else
"Could only read %lu of %u entries in directory at offset %#llx",
(unsigned long)n, dircount, (unsigned long long) off);
#endif
dircount = n;
nextdiroff = 0;
} else {
TIFF*
TIFFClientOpen(
const char* name, const char* mode,
thandle_t clientdata,
TIFFReadWriteProc readproc,
TIFFReadWriteProc writeproc,
TIFFSeekProc seekproc,
TIFFCloseProc closeproc,
TIFFSizeProc sizeproc,
TIFFMapFileProc mapproc,
TIFFUnmapFileProc unmapproc
)
{
static const char module[] = "TIFFClientOpen";
TIFF *tif;
int m;
const char* cp;
/* The following are configuration checks. They should be redundant, but should not
* compile to any actual code in an optimised release build anyway. If any of them
* fail, (makefile-based or other) configuration is not correct */
assert(sizeof(uint8)==1);
assert(sizeof(int8)==1);
assert(sizeof(uint16)==2);
assert(sizeof(int16)==2);
assert(sizeof(uint32)==4);
assert(sizeof(int32)==4);
assert(sizeof(uint64)==8);
assert(sizeof(int64)==8);
assert(sizeof(tmsize_t)==sizeof(void*));
{
union{
uint8 a8[2];
uint16 a16;
} n;
n.a8[0]=1;
n.a8[1]=0;
#ifdef WORDS_BIGENDIAN
assert(n.a16==256);
#else
assert(n.a16==1);
#endif
}
m = _TIFFgetMode(mode, module);
if (m == -1)
goto bad2;
tif = (TIFF *)_TIFFmalloc((tmsize_t)(sizeof (TIFF) + strlen(name) + 1));
if (tif == NULL) {
TIFFErrorExt(clientdata, module, "%s: Out of memory (TIFF structure)", name);
goto bad2;
}
_TIFFmemset(tif, 0, sizeof (*tif));
tif->tif_name = (char *)tif + sizeof (TIFF);
strcpy(tif->tif_name, name);
tif->tif_mode = m &~ (O_CREAT|O_TRUNC);
tif->tif_curdir = (uint16) -1; /* non-existent directory */
tif->tif_curoff = 0;
tif->tif_curstrip = (uint32) -1; /* invalid strip */
tif->tif_row = (uint32) -1; /* read/write pre-increment */
tif->tif_clientdata = clientdata;
if (!readproc || !writeproc || !seekproc || !closeproc || !sizeproc) {
TIFFErrorExt(clientdata, module,
"One of the client procedures is NULL pointer.");
goto bad2;
}
tif->tif_readproc = readproc;
tif->tif_writeproc = writeproc;
tif->tif_seekproc = seekproc;
tif->tif_closeproc = closeproc;
tif->tif_sizeproc = sizeproc;
if (mapproc)
tif->tif_mapproc = mapproc;
else
tif->tif_mapproc = _tiffDummyMapProc;
if (unmapproc)
tif->tif_unmapproc = unmapproc;
else
tif->tif_unmapproc = _tiffDummyUnmapProc;
_TIFFSetDefaultCompressionState(tif); /* setup default state */
/*
* Default is to return data MSB2LSB and enable the
* use of memory-mapped files and strip chopping when
* a file is opened read-only.
*/
tif->tif_flags = FILLORDER_MSB2LSB;
if (m == O_RDONLY )
tif->tif_flags |= TIFF_MAPPED;
#ifdef STRIPCHOP_DEFAULT
if (m == O_RDONLY || m == O_RDWR)
tif->tif_flags |= STRIPCHOP_DEFAULT;
#endif
/*
* Process library-specific flags in the open mode string.
* The following flags may be used to control intrinsic library
* behaviour that may or may not be desirable (usually for
* compatibility with some application that claims to support
* TIFF but only supports some braindead idea of what the
* vendor thinks TIFF is):
*
* 'l' use little-endian byte order for creating a file
* 'b' use big-endian byte order for creating a file
* 'L' read/write information using LSB2MSB bit order
* 'B' read/write information using MSB2LSB bit order
* 'H' read/write information using host bit order
* 'M' enable use of memory-mapped files when supported
* 'm' disable use of memory-mapped files
* 'C' enable strip chopping support when reading
* 'c' disable strip chopping support
* 'h' read TIFF header only, do not load the first IFD
* '4' ClassicTIFF for creating a file (default)
* '8' BigTIFF for creating a file
*
* The use of the 'l' and 'b' flags is strongly discouraged.
* These flags are provided solely because numerous vendors,
* typically on the PC, do not correctly support TIFF; they
* only support the Intel little-endian byte order. This
* support is not configured by default because it supports
* the violation of the TIFF spec that says that readers *MUST*
* support both byte orders. It is strongly recommended that
* you not use this feature except to deal with busted apps
* that write invalid TIFF. And even in those cases you should
* bang on the vendors to fix their software.
*
* The 'L', 'B', and 'H' flags are intended for applications
* that can optimize operations on data by using a particular
* bit order. By default the library returns data in MSB2LSB
* bit order for compatibiltiy with older versions of this
* library. Returning data in the bit order of the native cpu
* makes the most sense but also requires applications to check
* the value of the FillOrder tag; something they probably do
* not do right now.
*
* The 'M' and 'm' flags are provided because some virtual memory
* systems exhibit poor behaviour when large images are mapped.
* These options permit clients to control the use of memory-mapped
* files on a per-file basis.
*
* The 'C' and 'c' flags are provided because the library support
* for chopping up large strips into multiple smaller strips is not
* application-transparent and as such can cause problems. The 'c'
* option permits applications that only want to look at the tags,
* for example, to get the unadulterated TIFF tag information.
*/
for (cp = mode; *cp; cp++)
switch (*cp) {
case 'b':
#ifndef WORDS_BIGENDIAN
if (m&O_CREAT)
tif->tif_flags |= TIFF_SWAB;
#endif
break;
case 'l':
#ifdef WORDS_BIGENDIAN
if ((m&O_CREAT))
tif->tif_flags |= TIFF_SWAB;
#endif
break;
case 'B':
tif->tif_flags = (tif->tif_flags &~ TIFF_FILLORDER) |
FILLORDER_MSB2LSB;
break;
case 'L':
tif->tif_flags = (tif->tif_flags &~ TIFF_FILLORDER) |
FILLORDER_LSB2MSB;
break;
case 'H':
tif->tif_flags = (tif->tif_flags &~ TIFF_FILLORDER) |
HOST_FILLORDER;
break;
case 'M':
if (m == O_RDONLY)
tif->tif_flags |= TIFF_MAPPED;
break;
case 'm':
if (m == O_RDONLY)
tif->tif_flags &= ~TIFF_MAPPED;
break;
case 'C':
if (m == O_RDONLY)
tif->tif_flags |= TIFF_STRIPCHOP;
break;
case 'c':
if (m == O_RDONLY)
tif->tif_flags &= ~TIFF_STRIPCHOP;
break;
case 'h':
tif->tif_flags |= TIFF_HEADERONLY;
break;
case '8':
if (m&O_CREAT)
tif->tif_flags |= TIFF_BIGTIFF;
break;
}
/*
* Read in TIFF header.
*/
if ((m & O_TRUNC) ||
!ReadOK(tif, &tif->tif_header, sizeof (TIFFHeaderClassic))) {
if (tif->tif_mode == O_RDONLY) {
TIFFErrorExt(tif->tif_clientdata, name,
"Cannot read TIFF header");
goto bad;
}
/*
* Setup header and write.
*/
#ifdef WORDS_BIGENDIAN
tif->tif_header.common.tiff_magic = tif->tif_flags & TIFF_SWAB
? TIFF_LITTLEENDIAN : TIFF_BIGENDIAN;
#else
tif->tif_header.common.tiff_magic = tif->tif_flags & TIFF_SWAB
? TIFF_BIGENDIAN : TIFF_LITTLEENDIAN;
#endif
if (!(tif->tif_flags&TIFF_BIGTIFF))
{
tif->tif_header.common.tiff_version = TIFF_VERSION_CLASSIC;
tif->tif_header.classic.tiff_diroff = 0;
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabShort(&tif->tif_header.common.tiff_version);
tif->tif_header_size = sizeof(TIFFHeaderClassic);
}
else
{
tif->tif_header.common.tiff_version = TIFF_VERSION_BIG;
tif->tif_header.big.tiff_offsetsize = 8;
tif->tif_header.big.tiff_unused = 0;
tif->tif_header.big.tiff_diroff = 0;
if (tif->tif_flags & TIFF_SWAB)
{
TIFFSwabShort(&tif->tif_header.common.tiff_version);
TIFFSwabShort(&tif->tif_header.big.tiff_offsetsize);
}
tif->tif_header_size = sizeof (TIFFHeaderBig);
}
/*
* The doc for "fopen" for some STD_C_LIBs says that if you
* open a file for modify ("+"), then you must fseek (or
* fflush?) between any freads and fwrites. This is not
* necessary on most systems, but has been shown to be needed
* on Solaris.
*/
TIFFSeekFile( tif, 0, SEEK_SET );
if (!WriteOK(tif, &tif->tif_header, (tmsize_t)(tif->tif_header_size))) {
TIFFErrorExt(tif->tif_clientdata, name,
"Error writing TIFF header");
goto bad;
}
/*
* Setup the byte order handling.
*/
if (tif->tif_header.common.tiff_magic == TIFF_BIGENDIAN) {
#ifndef WORDS_BIGENDIAN
tif->tif_flags |= TIFF_SWAB;
#endif
} else {
#ifdef WORDS_BIGENDIAN
tif->tif_flags |= TIFF_SWAB;
#endif
}
/*
* Setup default directory.
*/
if (!TIFFDefaultDirectory(tif))
goto bad;
tif->tif_diroff = 0;
tif->tif_dirlist = NULL;
tif->tif_dirlistsize = 0;
tif->tif_dirnumber = 0;
return (tif);
}
/*
* Setup the byte order handling.
*/
if (tif->tif_header.common.tiff_magic != TIFF_BIGENDIAN &&
tif->tif_header.common.tiff_magic != TIFF_LITTLEENDIAN
#if MDI_SUPPORT
&&
#if HOST_BIGENDIAN
tif->tif_header.common.tiff_magic != MDI_BIGENDIAN
#else
tif->tif_header.common.tiff_magic != MDI_LITTLEENDIAN
#endif
) {
TIFFErrorExt(tif->tif_clientdata, name,
"Not a TIFF or MDI file, bad magic number %d (0x%x)",
#else
) {
TIFFErrorExt(tif->tif_clientdata, name,
"Not a TIFF file, bad magic number %d (0x%x)",
#endif
tif->tif_header.common.tiff_magic,
tif->tif_header.common.tiff_magic);
goto bad;
}
if (tif->tif_header.common.tiff_magic == TIFF_BIGENDIAN) {
#ifndef WORDS_BIGENDIAN
tif->tif_flags |= TIFF_SWAB;
#endif
} else {
#ifdef WORDS_BIGENDIAN
tif->tif_flags |= TIFF_SWAB;
#endif
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabShort(&tif->tif_header.common.tiff_version);
if ((tif->tif_header.common.tiff_version != TIFF_VERSION_CLASSIC)&&
(tif->tif_header.common.tiff_version != TIFF_VERSION_BIG)) {
TIFFErrorExt(tif->tif_clientdata, name,
"Not a TIFF file, bad version number %d (0x%x)",
tif->tif_header.common.tiff_version,
tif->tif_header.common.tiff_version);
goto bad;
}
if (tif->tif_header.common.tiff_version == TIFF_VERSION_CLASSIC)
{
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong(&tif->tif_header.classic.tiff_diroff);
tif->tif_header_size = sizeof(TIFFHeaderClassic);
}
else
{
if (!ReadOK(tif, ((uint8*)(&tif->tif_header) + sizeof(TIFFHeaderClassic)), (sizeof(TIFFHeaderBig)-sizeof(TIFFHeaderClassic))))
{
TIFFErrorExt(tif->tif_clientdata, name,
"Cannot read TIFF header");
goto bad;
}
if (tif->tif_flags & TIFF_SWAB)
{
TIFFSwabShort(&tif->tif_header.big.tiff_offsetsize);
TIFFSwabLong8(&tif->tif_header.big.tiff_diroff);
}
if (tif->tif_header.big.tiff_offsetsize != 8)
{
TIFFErrorExt(tif->tif_clientdata, name,
"Not a TIFF file, bad BigTIFF offsetsize %d (0x%x)",
tif->tif_header.big.tiff_offsetsize,
tif->tif_header.big.tiff_offsetsize);
goto bad;
}
if (tif->tif_header.big.tiff_unused != 0)
{
TIFFErrorExt(tif->tif_clientdata, name,
"Not a TIFF file, bad BigTIFF unused %d (0x%x)",
tif->tif_header.big.tiff_unused,
tif->tif_header.big.tiff_unused);
goto bad;
}
tif->tif_header_size = sizeof(TIFFHeaderBig);
tif->tif_flags |= TIFF_BIGTIFF;
}
tif->tif_flags |= TIFF_MYBUFFER;
tif->tif_rawcp = tif->tif_rawdata = 0;
tif->tif_rawdatasize = 0;
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = 0;
switch (mode[0]) {
case 'r':
if (!(tif->tif_flags&TIFF_BIGTIFF))
tif->tif_nextdiroff = tif->tif_header.classic.tiff_diroff;
else
tif->tif_nextdiroff = tif->tif_header.big.tiff_diroff;
/*
* Try to use a memory-mapped file if the client
* has not explicitly suppressed usage with the
* 'm' flag in the open mode (see above).
*/
if (tif->tif_flags & TIFF_MAPPED)
{
toff_t n;
if (TIFFMapFileContents(tif,(void**)(&tif->tif_base),&n))
{
tif->tif_size=(tmsize_t)n;
assert((toff_t)tif->tif_size==n);
}
else
tif->tif_flags &= ~TIFF_MAPPED;
}
/*
* Sometimes we do not want to read the first directory (for example,
* it may be broken) and want to proceed to other directories. I this
* case we use the TIFF_HEADERONLY flag to open file and return
* immediately after reading TIFF header.
*/
if (tif->tif_flags & TIFF_HEADERONLY)
return (tif);
/*
* Setup initial directory.
*/
if (TIFFReadDirectory(tif)) {
tif->tif_rawcc = (tmsize_t)-1;
tif->tif_flags |= TIFF_BUFFERSETUP;
return (tif);
}
break;
case 'a':
/*
* New directories are automatically append
* to the end of the directory chain when they
* are written out (see TIFFWriteDirectory).
*/
if (!TIFFDefaultDirectory(tif))
goto bad;
return (tif);
}
bad:
tif->tif_mode = O_RDONLY; /* XXX avoid flush */
TIFFCleanup(tif);
bad2:
return ((TIFF*)0);
}
static void
dump(int fd, uint64 diroff)
{
unsigned i;
lseek(fd, (off_t) 0, 0);
if (read(fd, (char*) &hdr, sizeof (TIFFHeaderCommon)) != sizeof (TIFFHeaderCommon))
ReadError("TIFF header");
if (hdr.common.tiff_magic != TIFF_BIGENDIAN
&& hdr.common.tiff_magic != TIFF_LITTLEENDIAN &&
#if HOST_BIGENDIAN
/* MDI is sensitive to the host byte order, unlike TIFF */
MDI_BIGENDIAN != hdr.common.tiff_magic
#else
MDI_LITTLEENDIAN != hdr.common.tiff_magic
#endif
) {
Fatal("Not a TIFF or MDI file, bad magic number %u (%#x)",
hdr.common.tiff_magic, hdr.common.tiff_magic);
}
if (hdr.common.tiff_magic == TIFF_BIGENDIAN
|| hdr.common.tiff_magic == MDI_BIGENDIAN)
swabflag = !bigendian;
else
swabflag = bigendian;
if (swabflag)
TIFFSwabShort(&hdr.common.tiff_version);
if (hdr.common.tiff_version==42)
{
if (read(fd, (char*) &hdr.classic.tiff_diroff, 4) != 4)
ReadError("TIFF header");
if (swabflag)
TIFFSwabLong(&hdr.classic.tiff_diroff);
printf("Magic: %#x <%s-endian> Version: %#x <%s>\n",
hdr.classic.tiff_magic,
hdr.classic.tiff_magic == TIFF_BIGENDIAN ? "big" : "little",
42,"ClassicTIFF");
if (diroff == 0)
diroff = hdr.classic.tiff_diroff;
}
else if (hdr.common.tiff_version==43)
{
if (read(fd, (char*) &hdr.big.tiff_offsetsize, 12) != 12)
ReadError("TIFF header");
if (swabflag)
{
TIFFSwabShort(&hdr.big.tiff_offsetsize);
TIFFSwabShort(&hdr.big.tiff_unused);
TIFFSwabLong8(&hdr.big.tiff_diroff);
}
printf("Magic: %#x <%s-endian> Version: %#x <%s>\n",
hdr.big.tiff_magic,
hdr.big.tiff_magic == TIFF_BIGENDIAN ? "big" : "little",
43,"BigTIFF");
printf("OffsetSize: %#x Unused: %#x\n",
hdr.big.tiff_offsetsize,hdr.big.tiff_unused);
if (diroff == 0)
diroff = hdr.big.tiff_diroff;
bigtiff = 1;
}
else
Fatal("Not a TIFF file, bad version number %u (%#x)",
hdr.common.tiff_version, hdr.common.tiff_version);
for (i = 0; diroff != 0; i++) {
if (i > 0)
putchar('\n');
diroff = ReadDirectory(fd, i, diroff);
}
}
static void
dump(int fd, uint64 diroff)
{
unsigned i, j;
uint64* visited_diroff = NULL;
unsigned int count_visited_dir = 0;
_TIFF_lseek_f(fd, (_TIFF_off_t) 0, 0);
if (read(fd, (char*) &hdr, sizeof (TIFFHeaderCommon)) != sizeof (TIFFHeaderCommon))
ReadError("TIFF header");
if (hdr.common.tiff_magic != TIFF_BIGENDIAN
&& hdr.common.tiff_magic != TIFF_LITTLEENDIAN &&
#if HOST_BIGENDIAN
/* MDI is sensitive to the host byte order, unlike TIFF */
MDI_BIGENDIAN != hdr.common.tiff_magic
#else
MDI_LITTLEENDIAN != hdr.common.tiff_magic
#endif
) {
Fatal("Not a TIFF or MDI file, bad magic number %u (%#x)",
hdr.common.tiff_magic, hdr.common.tiff_magic);
}
if (hdr.common.tiff_magic == TIFF_BIGENDIAN
|| hdr.common.tiff_magic == MDI_BIGENDIAN)
swabflag = !bigendian;
else
swabflag = bigendian;
if (swabflag)
TIFFSwabShort(&hdr.common.tiff_version);
if (hdr.common.tiff_version==42)
{
if (read(fd, (char*) &hdr.classic.tiff_diroff, 4) != 4)
ReadError("TIFF header");
if (swabflag)
TIFFSwabLong(&hdr.classic.tiff_diroff);
printf("Magic: %#x <%s-endian> Version: %#x <%s>\n",
hdr.classic.tiff_magic,
hdr.classic.tiff_magic == TIFF_BIGENDIAN ? "big" : "little",
42,"ClassicTIFF");
if (diroff == 0)
diroff = hdr.classic.tiff_diroff;
}
else if (hdr.common.tiff_version==43)
{
if (read(fd, (char*) &hdr.big.tiff_offsetsize, 12) != 12)
ReadError("TIFF header");
if (swabflag)
{
TIFFSwabShort(&hdr.big.tiff_offsetsize);
TIFFSwabShort(&hdr.big.tiff_unused);
TIFFSwabLong8(&hdr.big.tiff_diroff);
}
printf("Magic: %#x <%s-endian> Version: %#x <%s>\n",
hdr.big.tiff_magic,
hdr.big.tiff_magic == TIFF_BIGENDIAN ? "big" : "little",
43,"BigTIFF");
printf("OffsetSize: %#x Unused: %#x\n",
hdr.big.tiff_offsetsize,hdr.big.tiff_unused);
if (diroff == 0)
diroff = hdr.big.tiff_diroff;
bigtiff = 1;
}
else
Fatal("Not a TIFF file, bad version number %u (%#x)",
hdr.common.tiff_version, hdr.common.tiff_version);
for (i = 0; diroff != 0; i++) {
for(j=0; j<count_visited_dir; j++)
{
if( visited_diroff[j] == diroff )
{
free(visited_diroff);
Fatal("Cycle detected in chaining of TIFF directories!");
}
}
{
size_t alloc_size;
alloc_size=TIFFSafeMultiply(tmsize_t,(count_visited_dir + 1),
sizeof(uint64));
if (alloc_size == 0)
{
if (visited_diroff)
free(visited_diroff);
visited_diroff = 0;
}
else
{
visited_diroff = (uint64*) realloc(visited_diroff,alloc_size);
}
}
if( !visited_diroff )
Fatal("Out of memory");
visited_diroff[count_visited_dir] = diroff;
count_visited_dir ++;
if (i > 0)
putchar('\n');
diroff = ReadDirectory(fd, i, diroff);
}
if( visited_diroff )
free(visited_diroff);
}
/*
* Function to convert standard TIFF file to BigTIFF file. Loop through all directories in
* current file (including subdirectories linked via SubIFD arrays) and create corresponding
* new directories with 64-bit arrays. The old 32-bit directories are left in the file as
* dead space. The data for directory entries are reused by default. Some directory entries
* require new data with 64-bit offsets (e.g. stripe/tile offsets and SubIFD arrays).
*
* Returns 1 if successful, 0 if cannot convert to BigTIFF (TIFF_NOBIGTIFF set
* or 32-bit API called).
*/
static int
TIFFMakeBigTIFF(TIFF *tif)
{
uint32 dirlink = TIFF_HEADER_DIROFF_S,
diroff = tif->tif_header.s.tiff_diroff;
toff_t dirlinkB = TIFF_HEADER_DIROFF_B,
diroffB;
uint16 dircount, dirindex;
uint64 dircountB;
tsize_t dirsize, dirsizeB;
int issubifd = 0;
uint32 subifdcnt = 0;
uint32 subifdlink;
toff_t subifdlinkB;
char *data, *dataB;
TIFFDirEntry *dir, *dirB;
/*
* Update flags and file header
*/
if (noBigTIFF(tif)) {
TIFFErrorExt((tif)->tif_clientdata,
"TIFFCheckBigTIFF", "File > 2^32 and NO BigTIFF specified");
return (0);
}
tif->tif_flags |= TIFF_ISBIGTIFF;
tif->tif_header.b.tiff_version = TIFF_BIGTIFF_VERSION;
tif->tif_header.b.tiff_offsize = 8;
tif->tif_header.b.tiff_fill = 0;
tif->tif_header.b.tiff_diroff = 0;
if (tif->tif_flags & TIFF_SWAB) {
TIFFSwabShort(&tif->tif_header.b.tiff_version);
TIFFSwabShort(&tif->tif_header.b.tiff_offsize);
}
if (!SeekOK(tif, 0) ||
!WriteOK(tif, &tif->tif_header, sizeof(TIFFHeader))) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Error updating TIFF header (%d)", TIFFGetErrno(tif));
return (0);
}
if (tif->tif_flags & TIFF_SWAB) {
TIFFSwabShort(&tif->tif_header.b.tiff_version);
TIFFSwabShort(&tif->tif_header.b.tiff_offsize);
}
/*
* Loop through all directories and rewrite as BigTIFF with 64-bit offsets. This
* begins with main IFD chain but may divert to SubIFD arrays as needed.
*/
while (diroff != 0 && diroff != tif->tif_diroff) {
if (!SeekOK(tif, diroff) ||
!ReadOK(tif, &dircount, sizeof(dircount))) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Error reading TIFF directory (%d)", TIFFGetErrno(tif));
return (0);
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabShort(&dircount);
dircountB = dircount;
if (!(data = _TIFFmalloc(dirsize = dircount * TIFFDirEntryLenS)) ||
!(dataB = _TIFFmalloc(dirsizeB = dircount * TIFFDirEntryLenB))) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Error allocating space for directory");
return (0);
}
if (!SeekOK(tif, diroff + sizeof(dircount)) ||
!ReadOK(tif, data, dirsize)) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Error reading TIFF directory (%d)", TIFFGetErrno(tif));
goto error;
}
diroffB = tif->tif_dataoff;
tif->tif_dataoff += sizeof(dircountB) + dirsizeB + sizeof(toff_t);
for (dirindex = 0; dirindex < dircount; dirindex++) {
dir = (TIFFDirEntry*) (data + dirindex * TIFFDirEntryLenS);
dirB = (TIFFDirEntry*) (dataB + dirindex * TIFFDirEntryLenB);
if (tif->tif_flags & TIFF_SWAB) {
TIFFSwabShort(&dir->s.tdir_tag);
TIFFSwabShort(&dir->s.tdir_type);
TIFFSwabLong(&dir->s.tdir_count);
TIFFSwabLong(&dir->s.tdir_offset);
}
dirB->b.tdir_tag = dir->s.tdir_tag;
dirB->b.tdir_type = dir->s.tdir_type;
dirB->b.tdir_count = dir->s.tdir_count;
dirB->b.tdir_offset = 0;
/*
* If data are in directory entry itself, copy data, else (data are pointed
* to by directory entry) copy pointer. This is complicated by the fact that
* the old entry had 32-bits of space, and the new has 64-bits, so may have
* to read data pointed at by the old entry directly into the new entry.
*/
switch (dir->s.tdir_type) {
case TIFF_UNDEFINED:
case TIFF_BYTE:
case TIFF_SBYTE:
case TIFF_ASCII:
if (dir->s.tdir_count <= sizeof(dir->s.tdir_offset))
_TIFFmemcpy(&dirB->b.tdir_offset, &dir->s.tdir_offset, dir->s.tdir_count);
else if (dir->s.tdir_count <= sizeof(dirB->b.tdir_count)) {
TIFFSeekFile(tif, dir->s.tdir_offset, SEEK_SET);
TIFFReadFile(tif, &dirB->b.tdir_offset, dir->s.tdir_count);
} else
dirB->b.tdir_offset = dir->s.tdir_offset;
break;
case TIFF_SHORT:
case TIFF_SSHORT:
if (dir->s.tdir_count <= sizeof(dir->s.tdir_offset) / sizeof(uint16))
_TIFFmemcpy(&dirB->b.tdir_offset, &dir->s.tdir_offset, dir->s.tdir_count * sizeof(uint16));
else if (dir->s.tdir_count <= sizeof(dirB->b.tdir_count) / sizeof(uint16)) {
TIFFSeekFile(tif, dir->s.tdir_offset, SEEK_SET);
TIFFReadFile(tif, &dirB->b.tdir_offset, dir->s.tdir_count * sizeof(uint16));
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabArrayOfShort((uint16*) &dirB->b.tdir_offset, dir->s.tdir_count);
} else
dirB->b.tdir_offset = dir->s.tdir_offset;
break;
case TIFF_LONG:
case TIFF_FLOAT:
case TIFF_IFD:
if (dir->s.tdir_count <= sizeof(dir->s.tdir_offset) / sizeof(uint32))
_TIFFmemcpy(&dirB->b.tdir_offset, &dir->s.tdir_offset, dir->s.tdir_count * sizeof(uint32));
else if (dir->s.tdir_count <= sizeof(dirB->b.tdir_count) / sizeof(uint32)) {
TIFFSeekFile(tif, dir->s.tdir_offset, SEEK_SET);
TIFFReadFile(tif, &dirB->b.tdir_offset, dir->s.tdir_count * sizeof(uint32));
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabArrayOfLong((uint32*) &dirB->b.tdir_offset, dir->s.tdir_count);
} else
dirB->b.tdir_offset = dir->s.tdir_offset;
break;
case TIFF_RATIONAL:
case TIFF_SRATIONAL:
if (dir->s.tdir_count * 2 <= sizeof(dirB->b.tdir_offset) / sizeof(uint32)) {
TIFFSeekFile(tif, dir->s.tdir_offset, SEEK_SET);
TIFFReadFile(tif, &dirB->b.tdir_offset, dir->s.tdir_count * 2 * sizeof(uint32));
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabArrayOfLong((uint32*) &dirB->b.tdir_offset, dir->s.tdir_count * 2);
} else
dirB->b.tdir_offset = dir->s.tdir_offset;
break;
default:
dirB->b.tdir_offset = dir->s.tdir_offset;
break;
}
/*
* Process special case of SUBIFD; must change data from 32-bit to 64-bit in
* case new 64-bit directory offsets need to be added.
*/
switch (dirB->b.tdir_tag) {
case TIFFTAG_SUBIFD:
dirB->b.tdir_type = TIFF_IFD8;
subifdcnt = dir->s.tdir_count;
/*
* Set pointer to existing SubIFD array
*/
if (subifdcnt <= sizeof(dir->s.tdir_offset) / sizeof(uint32))
subifdlink = diroff + sizeof(dircount) +
(char*) &dir->s.tdir_offset - (char*) dir;
else
subifdlink = dir->s.tdir_offset;
/*
* Initialize new SubIFD array, set pointer to it
*/
if (subifdcnt <= sizeof(dir->b.tdir_offset) / sizeof(toff_t)) {
dir->b.tdir_offset = 0;
subifdlinkB = diroffB + sizeof(dircountB) +
(char*) &dir->b.tdir_offset - (char*) dirB;
} else {
toff_t *offB;
if (!(offB = _TIFFmalloc(subifdcnt * sizeof(toff_t)))) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Error allocating space for 64-bit SubIFDs");
goto error;
}
_TIFFmemset(offB, 0, subifdcnt * sizeof(toff_t));
TIFFWriteLong8Array(tif, dirB, offB);
_TIFFfree(offB);
subifdlinkB = dirB->b.tdir_offset;
}
break;
}
if (tif->tif_flags & TIFF_SWAB) {
TIFFSwabShort(&dirB->b.tdir_tag);
TIFFSwabShort(&dirB->b.tdir_type);
TIFFSwabLong8(&dirB->b.tdir_count);
TIFFSwabLong8(&dirB->b.tdir_offset);
}
}
/*
* Write out new directory and chain to previous
*/
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong8(&dircountB);
if (!SeekOK(tif, diroffB) ||
!WriteOK(tif, &dircountB, sizeof(dircountB)) ||
!SeekOK(tif, diroffB + sizeof(dircountB)) ||
!WriteOK(tif, dataB, dirsizeB)) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Error writing TIFF directory (%d)", TIFFGetErrno(tif));
goto error;
}
/*
* If directory is SubIFD update array in host directory, else add to
* main directory chain
*/
if (tif->tif_nsubifd &&
tif->tif_subifdoff == subifdlink)
tif->tif_subifdoff = subifdlinkB;
if (!issubifd &&
dirlinkB == TIFF_HEADER_DIROFF_B)
tif->tif_header.b.tiff_diroff = diroffB;
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong8(&diroffB);
if (!SeekOK(tif, (issubifd ? subifdlinkB++ : dirlinkB)) ||
!WriteOK(tif, &diroffB, sizeof(diroffB))) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Error writing directory link (%d)", TIFFGetErrno(tif));
goto error;
}
if (issubifd)
subifdcnt--;
else {
dirlink = diroff + sizeof(dircount) + dirsize;
dirlinkB = diroffB + sizeof(dircountB) + dirsizeB;
}
issubifd = (subifdcnt > 0);
if (!SeekOK(tif, (issubifd ? subifdlink++ : dirlink)) ||
!ReadOK(tif, &diroff, sizeof(diroff))) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Error reading directory link (%d)", TIFFGetErrno(tif));
goto error;
}
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong(&diroff);
_TIFFfree(dataB);
_TIFFfree(data);
}
/*
* Mark end of directory chain
*/
diroffB = 0;
if (dirlinkB == TIFF_HEADER_DIROFF_B)
tif->tif_header.b.tiff_diroff = diroffB;
if (tif->tif_flags & TIFF_SWAB)
TIFFSwabLong8(&diroffB);
if (!SeekOK(tif, dirlinkB) ||
!WriteOK(tif, &diroffB, sizeof(diroffB))) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"Error writing directory link (%d)", TIFFGetErrno(tif));
goto error;
}
return (1);
error:
_TIFFfree(dataB);
_TIFFfree(data);
return (0);
}
