umult16(3) Library Functions Manual umult16(3)NAME
umult16 - integer multiplication with overflow checking
SYNTAX
#include <safemult.h>
int umult16(uint16 a,uint16 b,uint16* c);
DESCRIPTION
umult16 does c=a*b and returns 1.
In case of an integer overflow, umult16 leaves c alone and returns 0.
SEE ALSO imult16(3), imult32(3), imult64(3)umult16(3)
Check Out this Related Man Page
TIFFGetField(3tiff) Introduction to Library Functions TIFFGetField(3tiff)NAME
TIFFGetField, TIFFVGetField, TIFFGetFieldDefaulted, TIFFVGetFieldDefaulted - get the value(s) of a tag in an open TIFF file
SYNOPSIS
#include <tiffio.h>
int TIFFGetField(TIFF* tif, ttag_t tag, ...)
#include <stdarg.h>
int TIFFVGetField(TIFF* tif, ttag_t tag, va_list ap)
int TIFFGetFieldDefaulted(TIFF* tif, ttag_t tag, ...)
int TIFFVGetFieldDefaulted(TIFF* tif, ttag_t tag, va_list
ap)
DESCRIPTION
TIFFGetField returns the value of a tag or pseudo-tag associated with the current directory of the open TIFF file. A pseudo-tag is a param-
eter that is used to control the operation of the TIFF library but whose value is not read or written to the underlying file. The file must
have been previously opened with TIFFOpen(3tiff). The tag is identified by tag, one of the values defined in the include file tiff.h (see
also the table below). The type and number of values returned is dependent on the tag being requested. The programming interface uses a
variable argument list as prescribed by the stdarg(3) interface. The returned values should only be interpreted if TIFFGetField returns 1.
EXTENDED DESCRIPTION
TIFFVGetField is functionally equivalent to TIFFGetField except that TIFFVGetField takes a pointer to a variable argument list. TIFFVGet-
Field is useful for layering interfaces on top of the functionality provided by TIFFGetField.
TIFFGetFieldDefaulted and TIFFVGetFieldDefaulted are identical to TIFFGetField and TIFFVGetField, except that if a tag is not defined in
the current directory and has a default value, then the default value is returned.
The tags understood by libtiff, the number of parameter values, and the types for the returned values are shown below. The data types are
specified as in C and correspond to the types used to specify tag values to TIFFSetField(3tiff). Remember that TIFFGetField returns parame-
ter values, so all of the listed data types are pointers to storage where values should be returned. Consult the TIFF specification for
information on the meaning of each tag and their possible values.
+-------------------------------+----------------+------------------+------------------------------+
|TAG NAME | COUNT | TYPES | NOTES |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_ARTIST | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_BADFAXLINES | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_BITSPERSAMPLE | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_CLEANFAXDATA | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_COLORMAP | 3 | uint16** | 1<<BitsPerSample arrays |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_COMPRESSION | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_CONSECUTIVEBADFAXLINES | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_DATATYPE | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_DATETIME | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_DOCUMENTNAME | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_DOTRANGE | 2 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_EXTRASAMPLES | 2 | uint16*,uint16** | count and types array |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_FAXMODE | 1 | int* | G3/G4 compression |
+-------------------------------+----------------+------------------+------------------------------+
|pseudo-tag | | | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_FAXFILLFUNC | 1 | TIFFFaxFillFunc* | G3/G4 compression pseudo-tag |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_FILLORDER | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_GROUP3OPTIONS | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_GROUP4OPTIONS | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_HALFTONEHINTS | 2 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_HOSTCOMPUTER | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_IMAGEDEPTH | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_IMAGEDESCRIPTION | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_IMAGELENGTH | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_IMAGEWIDTH | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_INKNAMES | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_INKSET | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_JPEGTABLES | 2 | u_short*,void** | count and tables |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_JPEGQUALITY | 1 | int* | JPEG pseudo-tag |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_JPEGCOLORMODE | 1 | int* | JPEG pseudo-tag |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_JPEGTABLESMODE | 1 | int* | JPEG pseudo-tag |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_MAKE | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_MATTEING | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_MAXSAMPLEVALUE | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_MINSAMPLEVALUE | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_MODEL | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_ORIENTATION | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_PAGENAME | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_PAGENUMBER | 2 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_PHOTOMETRIC | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_PLANARCONFIG | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_PREDICTOR | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_PRIMARYCHROMACITIES | 1 | float** | 6-entry array |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_REFERENCEBLACKWHITE | 1 | float** | 2*SamplesPerPixel array |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_RESOLUTIONUNIT | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_ROWSPERSTRIP | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_SAMPLEFORMAT | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_SAMPLESPERPIXEL | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_SMAXSAMPLEVALUE | 1 | double* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_SMINSAMPLEVALUE | 1 | double* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_SOFTWARE | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_STONITS | 1 | double** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_STRIPBYTECOUNTS | 1 | uint32** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_STRIPOFFSETS | 1 | uint32** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_SUBFILETYPE | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_SUBIFD | 2 | uint16*,uint32** | count and offsets array |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_TARGETPRINTER | 1 | char** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_THRESHOLDING | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_TILEBYTECOUNTS | 1 | uint32** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_TILEDEPTH | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_TILELENGTH | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_TILEOFFSETS | 1 | uint32** | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_TILEWIDTH | 1 | uint32* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_TRANSFERFUNCTION | 1 or 3- | uint16** | 1<<BitsPerSample entry |
| | | | arrays |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_WHITEPOINT | 1 | float** | 2-entry array |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_XPOSITION | 1 | float* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_XRESOLUTION | 1 | float* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_YCBCRCOEFFICIENTS | 1 | float** | 3-entry array |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_YCBCRPOSITIONING | 1 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_YCBCRSUBSAMPLING | 2 | uint16* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_YPOSITION | 1 | float* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_YRESOLUTION | 1 | float* | |
+-------------------------------+----------------+------------------+------------------------------+
|TIFFTAG_ICCPROFILE | 2 | uint32*,void** | count, profile data= |
+-------------------------------+----------------+------------------+------------------------------+
- If SamplesPerPixel is 1, then a single array is returned. Otherwise, three arrays are returned.
= The contents of this field are quite complex. See The ICC Profile Format Specification, Annex B "Embedding ICC Pro-
files in TIFF Files", available at http://www.color.org, for an explanation.
Diagnostics
All error messages are directed to the TIFFError(3tiff) routine.
Unknown field, tag 0x%x.An unknown tag was supplied.
RETURN VALUES
1 is returned if the tag is defined in the current directory. Otherwise, 0 is returned.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWTiff |
+-----------------------------+-----------------------------+
|Interface stability |External |
+-----------------------------+-----------------------------+
SEE ALSO libtiff(3), TIFFOpen(3tiff), TIFFSetField(3tiff), TIFFSetDirectory(3tiff), TIFFReadDirectory(3tiff), TIFFWriteDirectory(3tiff)NOTES
This man page was originally written by Sam Leffler. Updated by Breda McColgan, Sun Microsystems Inc., 2004.
SunOS 5.10 05 Apr 2004 TIFFGetField(3tiff)