.\" $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
.\" that (i) the above copyright notices and this permission notice appear in
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.\" 
.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
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.\"
.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>"
.sp
.BI "void TIFFError(const char *" module ", const char *" fmt ", " ... ")"
.sp
.B "#include <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/