void
pic_print_backtrace(pic_state *pic, xFILE *file)
{
assert(! pic_invalid_p(pic->err));
if (! pic_error_p(pic->err)) {
xfprintf(file, "raise: ");
pic_fwrite(pic, pic->err, file);
} else {
struct pic_error *e;
e = pic_error_ptr(pic->err);
if (e->type != pic_intern_cstr(pic, "")) {
pic_fwrite(pic, pic_obj_value(e->type), file);
xfprintf(file, " ");
}
xfprintf(file, "error: ");
pic_fwrite(pic, pic_obj_value(e->msg), file);
xfprintf(file, "\n");
/* TODO: print error irritants */
xfputs(pic_str_cstr(pic, e->stack), file);
}
}
pic_value
pic_xvfformat(pic_state *pic, xFILE *file, const char *fmt, va_list ap)
{
char c;
pic_value irrs = pic_nil_value();
while ((c = *fmt++)) {
switch (c) {
default:
xfputc(pic, c, file);
break;
case '%':
c = *fmt++;
if (! c)
goto exit;
switch (c) {
default:
xfputc(pic, c, file);
break;
case '%':
xfputc(pic, '%', file);
break;
case 'c':
xfprintf(pic, file, "%c", va_arg(ap, int));
break;
case 's':
xfprintf(pic, file, "%s", va_arg(ap, const char *));
break;
case 'd':
xfprintf(pic, file, "%d", va_arg(ap, int));
break;
case 'p':
xfprintf(pic, file, "%p", va_arg(ap, void *));
break;
case 'f':
xfprintf(pic, file, "%f", va_arg(ap, double));
break;
}
break;
case '~':
c = *fmt++;
if (! c)
goto exit;
switch (c) {
default:
xfputc(pic, c, file);
break;
case '~':
xfputc(pic, '~', file);
break;
case '%':
xfputc(pic, '\n', file);
break;
case 'a':
irrs = pic_cons(pic, pic_fdisplay(pic, va_arg(ap, pic_value), file), irrs);
break;
case 's':
irrs = pic_cons(pic, pic_fwrite(pic, va_arg(ap, pic_value), file), irrs);
break;
}
break;
}
}
exit:
return pic_reverse(pic, irrs);
}