scx/c/xlib/error.c

#include "xlib.h"
#include <stdio.h>

s48_value internal_x_error_handler_binding = S48_FALSE;
s48_value internal_x_fatal_error_handler_binding = S48_FALSE;

/* Default error handlers of the Xlib */
extern int _XDefaultIOError();   
extern int _XDefaultError();

static X_Fatal_Error (Display* d) {
  //Reset_IO (0); //??

  // call the scheme-func internal-x-fatal-error-handler, which does the rest.
  s48_call_scheme(S48_SHARED_BINDING_REF(internal_x_fatal_error_handler_binding),
		  1, SCX_ENTER_DISPLAY(d));

  // In case the scheme error handler does not exit (or none exists):
  _XDefaultIOError (d);
  // And if event the default handler does not exit:
  exit (1);         
  /*NOTREACHED*/
}

static X_Error(Display* d, XErrorEvent* ep) {
  s48_value args = s48_make_vector(7, S48_FALSE);
  s48_value a = S48_FALSE, r = S48_FALSE;
  int max_s = 1024;
  char s[max_s];
  S48_DECLARE_GC_PROTECT(2);

  //Reset_IO (0); //??

  S48_GC_PROTECT_2(args, a);
  S48_VECTOR_SET(args, 0, SCX_ENTER_DISPLAY(d));
  S48_VECTOR_SET(args, 1, s48_enter_integer(ep->serial));
  S48_VECTOR_SET(args, 2, s48_enter_integer(ep->error_code));
  S48_VECTOR_SET(args, 3, s48_enter_integer(ep->request_code));
  S48_VECTOR_SET(args, 4, s48_enter_integer(ep->minor_code));
  S48_VECTOR_SET(args, 5, s48_enter_integer((unsigned long)ep->resourceid));
  XGetErrorText(d, ep->error_code, s, max_s);
  S48_VECTOR_SET(args, 6, s48_enter_string(s)); 

  r = s48_call_scheme(S48_SHARED_BINDING_REF(internal_x_error_handler_binding),
		      1, args);

  S48_GC_UNPROTECT();

  if S48_FALSE_P( r )
    _XDefaultError (d, ep);
}

void scx_init_error() {
  S48_GC_PROTECT_GLOBAL(internal_x_error_handler_binding);
  S48_GC_PROTECT_GLOBAL(internal_x_fatal_error_handler_binding);
  internal_x_error_handler_binding = 
    s48_get_imported_binding("internal-x-error-handler");
  internal_x_fatal_error_handler_binding =
    s48_get_imported_binding("internal-x-fatal-error-handler");

  (void)XSetIOErrorHandler (X_Fatal_Error);
  (void)XSetErrorHandler (X_Error);

}