src/tiff/man/TIFFWarning.3tiff

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  25 .if n .po 0
  26 .TH TIFFWarning 3TIFF "October 15, 1995" "libtiff"
  27 .SH NAME
  28 TIFFWarning, TIFFSetWarningHandler \- library warning interface
  29 .SH SYNOPSIS
  30 .B "#include <tiffio.h>"
  31 .sp
  32 .BI "void TIFFWarning(const char *" module ", const char *" fmt ", " ... ")"
  33 .sp
  34 .B "#include <stdarg.h>"
  35 .sp
  36 .BI "typedef void (*TIFFWarningHandler)(const char *" module ", const char *" fmt ", va_list " ap ");"
  37 .sp
  38 .BI "TIFFWarningHandler TIFFSetWarningHandler(TIFFWarningHandler " handler ");"
  39 .SH DESCRIPTION
  40 .I TIFFWarning
  41 invokes the library-wide warning handler function to (normally) write a
  42 warning message to the
  43 .BR stderr .
  44 The
  45 .I fmt
  46 parameter is a
  47 .IR printf (3S)
  48 format string, and any number arguments can be supplied. The
  49 .I module
  50 parameter is interpreted as a string that, if non-zero, should be printed
  51 before the message; it typically is used to identify the software module in
  52 which a warning is detected.
  53 .PP
  54 Applications that desire to capture control in the event of a warning should
  55 use
  56 .IR TIFFSetWarningHandler
  57 to override the default warning handler.
  58 A
  59 .SM NULL
  60 (0) warning handler function may be installed to suppress error messages.
  61 .SH "RETURN VALUES"
  62 .IR TIFFSetWarningHandler
  63 returns a reference to the previous error handling function.
  64 .SH "SEE ALSO"
  65 .BR TIFFError (3TIFF),
  66 .BR libtiff (3TIFF),
  67 .BR printf (3)
  68 .PP
  69 Libtiff library home page:
  70 .BR http://www.remotesensing.org/libtiff/