IM_ERRORMSG(3)

NAME
im_error_buffer, im_verror, im_error, im_error_clear, im_warn, im_diag, error_exit - handle error messages from VIPS

SYNOPSIS
#include <vips/vips.h> const char *im_error_buffer( void ) void im_verror( const char *domain, const char *fmt, va_list ap ) void im_error( const char *domain, const char *fmt, ... ) void im_error_system( int errno, const char *domain, const char *fmt, ... ) void im_error_clear() void im_warn( const char *domain, const char *fmt, ... ) void im_diag( const char *domain, const char *fmt, ... ) void error_exit( const char *fmt, ... )

DESCRIPTION
im_error(3) formats its arguments as printf and appends the string, with a newline, to the error buffer. The domain argument indicates the error source and should not be marked for translation. For example, the call:
  im_error( "mystuff", _( "bad argument %d" ), a ); might appear in the error buffer as:
  mystuff: bad argument 12 im_verror(3) works exactly as im_error(3) but takes stdarg arguments. im_error_system(3) works exactly as im_error(3) but additionally will translate and append a system error code. im_error_buffer(3) returns a pointer to the start of the error buffer. im_error_clear(3) empties the error buffer. error_exit(3) formats its arguments as printf and sends the result to the error output, together with the contents of the error log, before terminating with an error status. im_warn(3) works as im_error(), but output is sent to the list of warnings. If an environment variable IM_WARNING exists, messages are suppressed. Warnings should be used for non-critical recoverable errors such as values being clipped. im_diag(3) works as im_error(), but output is sent to the list of diagnosic errors. If an environment variable IM_DIAGNOSTICS exists, messages are suppressed. Diagnostics should be used to give extra feedback about the result of the operation.

SEE ALSO
error_exit(3), im_intro(3).

COPYRIGHT
Birkbeck College

AUTHOR
N. Dessipris - 22/04/1991