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/* This file contains the generic warning and error methods. They simply
write the specified message to the plotter error stream, if it has one.
There is provision for user-specifiable warning/error message handlers
(not yet documented). */
/* All libplot warnings and error messages go through these functions, with
the exception of libpng error messages produced by PNG Plotters (see
z_write.c; they're different because they need to be produced by
callbacks). */
#include "sys-defines.h"
#include "extern.h"
/* mutex for locking the warning/error message subsystem */
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
pthread_mutex_t _message_mutex = PTHREAD_MUTEX_INITIALIZER;
#endif
#endif
/* user-settable handlers, defined in g_defplot.c to be NULL */
extern int (*libplot_warning_handler) ____P((const char *msg));
extern int (*libplot_error_handler) ____P((const char *msg));
void
#ifdef _HAVE_PROTOS
_g_warning (R___(Plotter *_plotter) const char *msg)
#else
_g_warning (R___(_plotter) msg)
S___(Plotter *_plotter;)
const char *msg;
#endif
{
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
/* lock the message subsystem */
pthread_mutex_lock (&_message_mutex);
#endif
#endif
if (libplot_warning_handler != NULL)
(*libplot_warning_handler)(msg);
else if (_plotter->data->errfp)
fprintf (_plotter->data->errfp, "libplot: %s\n", msg);
#ifdef LIBPLOTTER
else if (_plotter->data->errstream)
(*(_plotter->data->errstream)) << "libplot: " << msg << '\n';
#endif
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
/* unlock the message subsystem */
pthread_mutex_unlock (&_message_mutex);
#endif
#endif
}
void
#ifdef _HAVE_PROTOS
_g_error (R___(Plotter *_plotter) const char *msg)
#else
_g_error (R___(_plotter) msg)
S___(Plotter *_plotter;)
const char *msg;
#endif
{
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
/* lock the message subsystem */
pthread_mutex_lock (&_message_mutex);
#endif
#endif
if (libplot_error_handler != NULL)
(*libplot_error_handler)(msg);
else if (_plotter->data->errfp)
fprintf (_plotter->data->errfp, "libplot error: %s\n", msg);
#ifdef LIBPLOTTER
else if (_plotter->data->errstream)
(*(_plotter->data->errstream)) << "libplot error: " << msg << '\n';
#endif
#ifdef PTHREAD_SUPPORT
#ifdef HAVE_PTHREAD_H
/* unlock the message subsystem */
pthread_mutex_unlock (&_message_mutex);
#endif
#endif
}
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