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.TH "TIFFFIELDREADCOUNT" "3tiff" "Jan 27, 2024" "4.5" "LibTIFF"
.SH NAME
TIFFFieldReadCount \- get number of values to be read from field
.SH SYNOPSIS
.INDENT 0.0
.INDENT 3.5
.sp
.EX
#include <tiffio.h>
.EE
.UNINDENT
.UNINDENT
.INDENT 0.0
.TP
.B int TIFFFieldReadCount(const TIFFField *fip) 
.UNINDENT
.SH DESCRIPTION
.sp
\fI\%TIFFFieldReadCount()\fP returns the number of values available to be read
from the specified TIFF field; that is, the number of arguments that should be
supplied to \fI\%TIFFGetField()\fP\&.  For most field types this is a small
positive integer, typically 1 or 2, but there are some special values:
.INDENT 0.0
.IP \(bu 2
\fBTIFF_VARIABLE\fP \fB= \-1\fP indicates that a variable number of
values is possible; then, a \fBuint16_t\fP \fIcount\fP argument and a
pointer \fIdata\fP argument must be supplied to \fI\%TIFFGetField()\fP\&.
.IP \(bu 2
\fBTIFF_VARIABLE2\fP \fB= \-3\fP is the same as \fBTIFF_VARIABLE\fP
except that the \fIcount\fP argument must have type \fBuint32_t\fP\&.
.IP \(bu 2
\fBTIFF_SPP\fP \fB= \-2\fP indicates that the number of arguments is
equal to the image\(aqs number of samples per pixel.
.UNINDENT
.sp
\fIfip\fP is a field information pointer previously returned by
\fI\%TIFFFindField()\fP, \fI\%TIFFFieldWithTag()\fP, or
\fI\%TIFFFieldWithName()\fP\&.
.SH RETURN VALUES
.sp
\fI\%TIFFFieldReadCount()\fP returns an integer.
.SH SEE ALSO
.sp
\fI\%libtiff\fP (3tiff)
.SH AUTHOR
LibTIFF contributors
.SH COPYRIGHT
1988-2024, LibTIFF contributors
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