#include "xlib.h"

s48_value scx_List_Extensions (s48_value d) {
  s48_value ret;
  int n, i;
  char **p;
  S48_DECLARE_GC_PROTECT(1);
  
  //Disable_Interrupts;
  p = XListExtensions (SCX_EXTRACT_DISPLAY(d), &n);
  //Enable_Interrupts;
  ret = s48_make_vector (n, S48_FALSE);
  S48_GC_PROTECT_1 (ret);
  for (i = 0; i < n; i++) {
    S48_VECTOR_SET(ret, i, s48_enter_string(p[i]));
  }
  S48_GC_UNPROTECT();
  XFreeExtensionList (p);
  return ret;
}

s48_value scx_Query_Extension (s48_value d, s48_value name) {
  int opcode, event, error;
  s48_value ret;
  S48_DECLARE_GC_PROTECT(1);

  if (!XQueryExtension (SCX_EXTRACT_DISPLAY(d), 
			s48_extract_string(name), 
			&opcode, &event, &error))
    return S48_FALSE;

  ret = s48_make_vector(3, S48_FALSE);
  S48_GC_PROTECT_1(ret);

  S48_VECTOR_SET(ret, 0, opcode ? s48_enter_integer (opcode) : S48_FALSE);
  S48_VECTOR_SET(ret, 1, event ? s48_enter_integer (event) : S48_FALSE);
  S48_VECTOR_SET(ret, 2, error ? s48_enter_integer (error) : S48_FALSE);

  S48_GC_UNPROTECT();
  return ret;
}

scx_init_extension () {
  S48_EXPORT_FUNCTION(scx_List_Extensions);
  S48_EXPORT_FUNCTION(scx_Query_Extension);
}