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.\" $Id: TIFFWarning.3tiff,v 1.2 2005/11/02 11:07:18 dron Exp $
.\"
.\" 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.
.\"
.if n .po 0
.TH TIFFWarning 3TIFF "October 15, 1995" "libtiff"
.SH NAME
TIFFWarning, TIFFSetWarningHandler \- library warning interface
.SH SYNOPSIS
.B "#include <tiffio.h>"
.sp
.BI "void TIFFWarning(const char *" module ", const char *" fmt ", " ... ")"
.sp
.B "#include <stdargh.h>"
.sp
.BI "typedef void (*TIFFWarningHandler)(const char *" module ", const char *" fmt ", va_list " ap ");"
.sp
.BI "TIFFWarningHandler TIFFSetWarningHandler(TIFFWarningHandler " handler ");"
.SH DESCRIPTION
.I TIFFWarning
invokes the library-wide warning handler function to (normally) write a
warning message to the
.BR stderr .
The
.I fmt
parameter is a
.IR printf (3S)
format string, and any number arguments can be supplied. The
.I module
parameter is interpreted as a string that, if non-zero, should be printed
before the message; it typically is used to identify the software module in
which a warning is detected.
.PP
Applications that desire to capture control in the event of a warning should
use
.IR TIFFSetWarningHandler
to override the default warning handler.
A
.SM NULL
(0) warning handler function may be installed to suppress error messages.
.SH "RETURN VALUES"
.IR TIFFSetWarningHandler
returns a reference to the previous error handling function.
.SH "SEE ALSO"
.BR TIFFError (3TIFF),
.BR libtiff (3TIFF),
.BR printf (3)
.PP
Libtiff library home page:
.BR http://www.remotesensing.org/libtiff/
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