.\" $Id: TIFFError.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

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.\" 

.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 

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.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  

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.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR

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.\" OF THIS SOFTWARE.

.\"

.if n .po 0

.TH TIFFError 3TIFF "October 15, 1995" "libtiff"

.SH NAME

TIFFError, TIFFSetErrorHandler \- library error handling interface

.SH SYNOPSIS

.B "#include <tiffio.h>"</tiffio.h>

.sp

.BI "void TIFFError(const char *" module ", const char *" fmt ", " ... ")"

.sp

.B "#include <stdarg.h>"</stdarg.h>

.sp

.BI "typedef void (*TIFFErrorHandler)(const char *" module ", const char *" fmt ", va_list " ap ");"

.br

.B "TIFFErrorHandler TIFFSetErrorHandler(TIFFErrorHandler handler);"

.SH DESCRIPTION

.I TIFFError

invokes the library-wide error handling function to (normally) write an error

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, if non-zero, is printed before the message; it typically is used to

identify the software module in which an error is detected.

.PP

Applications that desire to capture control in the event of an error should

use

.IR TIFFSetErrorHandler

to override the default error handler.

A

.SM NULL

(0) error handling function may be installed to suppress error messages.

.SH "RETURN VALUES"

.IR TIFFSetErrorHandler

returns a reference to the previous error handling function.

.SH "SEE ALSO"

.BR TIFFWarning (3TIFF),

.BR libtiff (3TIFF),

.BR printf (3)

.PP

Libtiff library home page:

.BR http://www.remotesensing.org/libtiff/