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opencv/3rdparty/libtiff/tif_open.c
Michael Klatis 52f3f5a3f6
libtiff upgrade to version 4.6.0 (#25096) 
* libtiff upgrade to version 4.6.0

* fix tiffvers.h cmake generation

* temp: force build 3rd party deps from source

* remove libport.h and spintf.c

* cmake fixes

* don't use tiff_dummy_namespace on windows

* introduce numeric_types namespace alias

* include cstdint

* uint16_t is not a numeric_types type

* fix uint16 and uint32 type defs

* use standard c++ types

* remove unused files

* remove more unused files

* revert build 3rd party code from source

---------

Co-authored-by: Misha Klatis <misha.klatis@autodesk.com>
2024-03-22 04:08:16 +03:00

809 lines
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/*
* 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.
*/
#include "tiffiop.h"
#include <limits.h>
/*
* Dummy functions to fill the omitted client procedures.
*/
static int _tiffDummyMapProc(thandle_t fd, void **pbase, toff_t *psize)
{
(void)fd;
(void)pbase;
(void)psize;
return (0);
}
static void _tiffDummyUnmapProc(thandle_t fd, void *base, toff_t size)
{
(void)fd;
(void)base;
(void)size;
}
int _TIFFgetMode(TIFFOpenOptions *opts, thandle_t clientdata, const char *mode,
const char *module)
{
int m = -1;
switch (mode[0])
{
case 'r':
m = O_RDONLY;
if (mode[1] == '+')
m = O_RDWR;
break;
case 'w':
case 'a':
m = O_RDWR | O_CREAT;
if (mode[0] == 'w')
m |= O_TRUNC;
break;
default:
_TIFFErrorEarly(opts, clientdata, module, "\"%s\": Bad mode", mode);
break;
}
return (m);
}
TIFFOpenOptions *TIFFOpenOptionsAlloc()
{
TIFFOpenOptions *opts =
(TIFFOpenOptions *)_TIFFcalloc(1, sizeof(TIFFOpenOptions));
return opts;
}
void TIFFOpenOptionsFree(TIFFOpenOptions *opts) { _TIFFfree(opts); }
/** Define a limit in bytes for a single memory allocation done by libtiff.
* If max_single_mem_alloc is set to 0, no other limit that the underlying
* _TIFFmalloc() will be applied, which is the default.
*/
void TIFFOpenOptionsSetMaxSingleMemAlloc(TIFFOpenOptions *opts,
tmsize_t max_single_mem_alloc)
{
opts->max_single_mem_alloc = max_single_mem_alloc;
}
void TIFFOpenOptionsSetErrorHandlerExtR(TIFFOpenOptions *opts,
TIFFErrorHandlerExtR handler,
void *errorhandler_user_data)
{
opts->errorhandler = handler;
opts->errorhandler_user_data = errorhandler_user_data;
}
void TIFFOpenOptionsSetWarningHandlerExtR(TIFFOpenOptions *opts,
TIFFErrorHandlerExtR handler,
void *warnhandler_user_data)
{
opts->warnhandler = handler;
opts->warnhandler_user_data = warnhandler_user_data;
}
static void _TIFFEmitErrorAboveMaxSingleMemAlloc(TIFF *tif,
const char *pszFunction,
tmsize_t s)
{
TIFFErrorExtR(tif, pszFunction,
"Memory allocation of %" PRIu64
" bytes is beyond the %" PRIu64
" byte limit defined in open options",
(uint64_t)s, (uint64_t)tif->tif_max_single_mem_alloc);
}
/** malloc() version that takes into account memory-specific open options */
void *_TIFFmallocExt(TIFF *tif, tmsize_t s)
{
if (tif != NULL && tif->tif_max_single_mem_alloc > 0 &&
s > tif->tif_max_single_mem_alloc)
{
_TIFFEmitErrorAboveMaxSingleMemAlloc(tif, "_TIFFmallocExt", s);
return NULL;
}
return _TIFFmalloc(s);
}
/** calloc() version that takes into account memory-specific open options */
void *_TIFFcallocExt(TIFF *tif, tmsize_t nmemb, tmsize_t siz)
{
if (tif != NULL && tif->tif_max_single_mem_alloc > 0)
{
if (nmemb <= 0 || siz <= 0 || nmemb > TIFF_TMSIZE_T_MAX / siz)
return NULL;
if (nmemb * siz > tif->tif_max_single_mem_alloc)
{
_TIFFEmitErrorAboveMaxSingleMemAlloc(tif, "_TIFFcallocExt",
nmemb * siz);
return NULL;
}
}
return _TIFFcalloc(nmemb, siz);
}
/** realloc() version that takes into account memory-specific open options */
void *_TIFFreallocExt(TIFF *tif, void *p, tmsize_t s)
{
if (tif != NULL && tif->tif_max_single_mem_alloc > 0 &&
s > tif->tif_max_single_mem_alloc)
{
_TIFFEmitErrorAboveMaxSingleMemAlloc(tif, "_TIFFreallocExt", s);
return NULL;
}
return _TIFFrealloc(p, s);
}
/** free() version that takes into account memory-specific open options */
void _TIFFfreeExt(TIFF *tif, void *p)
{
(void)tif;
_TIFFfree(p);
}
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)
{
return TIFFClientOpenExt(name, mode, clientdata, readproc, writeproc,
seekproc, closeproc, sizeproc, mapproc, unmapproc,
NULL);
}
TIFF *TIFFClientOpenExt(const char *name, const char *mode,
thandle_t clientdata, TIFFReadWriteProc readproc,
TIFFReadWriteProc writeproc, TIFFSeekProc seekproc,
TIFFCloseProc closeproc, TIFFSizeProc sizeproc,
TIFFMapFileProc mapproc, TIFFUnmapFileProc unmapproc,
TIFFOpenOptions *opts)
{
static const char module[] = "TIFFClientOpenExt";
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_t) == 1);
assert(sizeof(int8_t) == 1);
assert(sizeof(uint16_t) == 2);
assert(sizeof(int16_t) == 2);
assert(sizeof(uint32_t) == 4);
assert(sizeof(int32_t) == 4);
assert(sizeof(uint64_t) == 8);
assert(sizeof(int64_t) == 8);
{
union
{
uint8_t a8[2];
uint16_t a16;
} n;
n.a8[0] = 1;
n.a8[1] = 0;
(void)n;
#ifdef WORDS_BIGENDIAN
assert(n.a16 == 256);
#else
assert(n.a16 == 1);
#endif
}
m = _TIFFgetMode(opts, clientdata, mode, module);
if (m == -1)
goto bad2;
tmsize_t size_to_alloc = (tmsize_t)(sizeof(TIFF) + strlen(name) + 1);
if (opts && opts->max_single_mem_alloc > 0 &&
size_to_alloc > opts->max_single_mem_alloc)
{
_TIFFErrorEarly(opts, clientdata, module,
"%s: Memory allocation of %" PRIu64
" bytes is beyond the %" PRIu64
" byte limit defined in open options",
name, (uint64_t)size_to_alloc,
(uint64_t)opts->max_single_mem_alloc);
goto bad2;
}
tif = (TIFF *)_TIFFmallocExt(NULL, size_to_alloc);
if (tif == NULL)
{
_TIFFErrorEarly(opts, 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 = TIFF_NON_EXISTENT_DIR_NUMBER; /* non-existent directory */
tif->tif_curoff = 0;
tif->tif_curstrip = (uint32_t)-1; /* invalid strip */
tif->tif_row = (uint32_t)-1; /* read/write pre-increment */
tif->tif_clientdata = clientdata;
tif->tif_readproc = readproc;
tif->tif_writeproc = writeproc;
tif->tif_seekproc = seekproc;
tif->tif_closeproc = closeproc;
tif->tif_sizeproc = sizeproc;
tif->tif_mapproc = mapproc ? mapproc : _tiffDummyMapProc;
tif->tif_unmapproc = unmapproc ? unmapproc : _tiffDummyUnmapProc;
if (opts)
{
tif->tif_errorhandler = opts->errorhandler;
tif->tif_errorhandler_user_data = opts->errorhandler_user_data;
tif->tif_warnhandler = opts->warnhandler;
tif->tif_warnhandler_user_data = opts->warnhandler_user_data;
tif->tif_max_single_mem_alloc = opts->max_single_mem_alloc;
}
if (!readproc || !writeproc || !seekproc || !closeproc || !sizeproc)
{
TIFFErrorExtR(tif, module,
"One of the client procedures is NULL pointer.");
_TIFFfreeExt(NULL, tif);
goto bad2;
}
_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
* behavior that may or may not be desirable (usually for
* compatibility with some application that claims to support
* TIFF but only supports some brain dead 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
* 'D' enable use of deferred strip/tile offset/bytecount array loading.
* 'O' on-demand loading of values instead of whole array loading (implies
* D)
*
* 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 compatibility 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 behavior 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':
TIFFWarningExtR(tif, name,
"H(ost) mode is deprecated. Since "
"libtiff 4.5.1, it is an alias of 'B' / "
"FILLORDER_MSB2LSB.");
tif->tif_flags =
(tif->tif_flags & ~TIFF_FILLORDER) | FILLORDER_MSB2LSB;
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;
case 'D':
tif->tif_flags |= TIFF_DEFERSTRILELOAD;
break;
case 'O':
if (m == O_RDONLY)
tif->tif_flags |=
(TIFF_LAZYSTRILELOAD | TIFF_DEFERSTRILELOAD);
break;
}
#ifdef DEFER_STRILE_LOAD
/* Compatibility with old DEFER_STRILE_LOAD compilation flag */
/* Probably unneeded, since to the best of my knowledge (E. Rouault) */
/* GDAL was the only user of this, and will now use the new 'D' flag */
tif->tif_flags |= TIFF_DEFERSTRILELOAD;
#endif
/*
* Read in TIFF header.
*/
if ((m & O_TRUNC) ||
!ReadOK(tif, &tif->tif_header, sizeof(TIFFHeaderClassic)))
{
if (tif->tif_mode == O_RDONLY)
{
TIFFErrorExtR(tif, 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)))
{
TIFFErrorExtR(tif, 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_lastdiroff = 0;
tif->tif_setdirectory_force_absolute = FALSE;
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
)
{
TIFFErrorExtR(tif, name,
"Not a TIFF or MDI file, bad magic number %" PRIu16
" (0x%" PRIx16 ")",
#else
)
{
TIFFErrorExtR(tif, name,
"Not a TIFF file, bad magic number %" PRIu16
" (0x%" PRIx16 ")",
#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))
{
TIFFErrorExtR(tif, name,
"Not a TIFF file, bad version number %" PRIu16
" (0x%" PRIx16 ")",
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_t *)(&tif->tif_header) + sizeof(TIFFHeaderClassic)),
(sizeof(TIFFHeaderBig) - sizeof(TIFFHeaderClassic))))
{
TIFFErrorExtR(tif, 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)
{
TIFFErrorExtR(tif, name,
"Not a TIFF file, bad BigTIFF offsetsize %" PRIu16
" (0x%" PRIx16 ")",
tif->tif_header.big.tiff_offsetsize,
tif->tif_header.big.tiff_offsetsize);
goto bad;
}
if (tif->tif_header.big.tiff_unused != 0)
{
TIFFErrorExtR(tif, name,
"Not a TIFF file, bad BigTIFF unused %" PRIu16
" (0x%" PRIx16 ")",
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))
{
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);
}
/*
* Query functions to access private data.
*/
/*
* Return open file's name.
*/
const char *TIFFFileName(TIFF *tif) { return (tif->tif_name); }
/*
* Set the file name.
*/
const char *TIFFSetFileName(TIFF *tif, const char *name)
{
const char *old_name = tif->tif_name;
tif->tif_name = (char *)name;
return (old_name);
}
/*
* Return open file's I/O descriptor.
*/
int TIFFFileno(TIFF *tif) { return (tif->tif_fd); }
/*
* Set open file's I/O descriptor, and return previous value.
*/
int TIFFSetFileno(TIFF *tif, int fd)
{
int old_fd = tif->tif_fd;
tif->tif_fd = fd;
return old_fd;
}
/*
* Return open file's clientdata.
*/
thandle_t TIFFClientdata(TIFF *tif) { return (tif->tif_clientdata); }
/*
* Set open file's clientdata, and return previous value.
*/
thandle_t TIFFSetClientdata(TIFF *tif, thandle_t newvalue)
{
thandle_t m = tif->tif_clientdata;
tif->tif_clientdata = newvalue;
return m;
}
/*
* Return read/write mode.
*/
int TIFFGetMode(TIFF *tif) { return (tif->tif_mode); }
/*
* Return read/write mode.
*/
int TIFFSetMode(TIFF *tif, int mode)
{
int old_mode = tif->tif_mode;
tif->tif_mode = mode;
return (old_mode);
}
/*
* Return nonzero if file is organized in
* tiles; zero if organized as strips.
*/
int TIFFIsTiled(TIFF *tif) { return (isTiled(tif)); }
/*
* Return current row being read/written.
*/
uint32_t TIFFCurrentRow(TIFF *tif) { return (tif->tif_row); }
/*
* Return index of the current directory.
*/
tdir_t TIFFCurrentDirectory(TIFF *tif) { return (tif->tif_curdir); }
/*
* Return current strip.
*/
uint32_t TIFFCurrentStrip(TIFF *tif) { return (tif->tif_curstrip); }
/*
* Return current tile.
*/
uint32_t TIFFCurrentTile(TIFF *tif) { return (tif->tif_curtile); }
/*
* Return nonzero if the file has byte-swapped data.
*/
int TIFFIsByteSwapped(TIFF *tif) { return ((tif->tif_flags & TIFF_SWAB) != 0); }
/*
* Return nonzero if the data is returned up-sampled.
*/
int TIFFIsUpSampled(TIFF *tif) { return (isUpSampled(tif)); }
/*
* Return nonzero if the data is returned in MSB-to-LSB bit order.
*/
int TIFFIsMSB2LSB(TIFF *tif) { return (isFillOrder(tif, FILLORDER_MSB2LSB)); }
/*
* Return nonzero if given file was written in big-endian order.
*/
int TIFFIsBigEndian(TIFF *tif)
{
return (tif->tif_header.common.tiff_magic == TIFF_BIGENDIAN);
}
/*
* Return nonzero if given file is BigTIFF style.
*/
int TIFFIsBigTIFF(TIFF *tif)
{
return (tif->tif_header.common.tiff_version == TIFF_VERSION_BIG);
}
/*
* Return pointer to file read method.
*/
TIFFReadWriteProc TIFFGetReadProc(TIFF *tif) { return (tif->tif_readproc); }
/*
* Return pointer to file write method.
*/
TIFFReadWriteProc TIFFGetWriteProc(TIFF *tif) { return (tif->tif_writeproc); }
/*
* Return pointer to file seek method.
*/
TIFFSeekProc TIFFGetSeekProc(TIFF *tif) { return (tif->tif_seekproc); }
/*
* Return pointer to file close method.
*/
TIFFCloseProc TIFFGetCloseProc(TIFF *tif) { return (tif->tif_closeproc); }
/*
* Return pointer to file size requesting method.
*/
TIFFSizeProc TIFFGetSizeProc(TIFF *tif) { return (tif->tif_sizeproc); }
/*
* Return pointer to memory mapping method.
*/
TIFFMapFileProc TIFFGetMapFileProc(TIFF *tif) { return (tif->tif_mapproc); }
/*
* Return pointer to memory unmapping method.
*/
TIFFUnmapFileProc TIFFGetUnmapFileProc(TIFF *tif)
{
return (tif->tif_unmapproc);
}
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