Function eval_expr

tools/ippfind.c:1742–1851

 */

static int				/* O - Result of evaluation */
eval_expr(ippfind_srv_t  *service,	/* I - Service */
	  ippfind_expr_t *expressions)	/* I - Expressions */
{
  ippfind_op_t		logic;		/* Logical operation */
  int			result;		/* Result of current expression */
  ippfind_expr_t	*expression;	/* Current expression */
  const char		*val;		/* TXT value */

 /*
  * Loop through the expressions...
  */

  if (expressions && expressions->parent)
    logic = expressions->parent->op;
  else
    logic = IPPFIND_OP_AND;

  for (expression = expressions; expression; expression = expression->next)
  {
    switch (expression->op)
    {
      default :
      case IPPFIND_OP_AND :
      case IPPFIND_OP_OR :
          if (expression->child)
            result = eval_expr(service, expression->child);
          else
            result = expression->op == IPPFIND_OP_AND;
          break;
      case IPPFIND_OP_TRUE :
          result = 1;
          break;
      case IPPFIND_OP_FALSE :
          result = 0;
          break;
      case IPPFIND_OP_IS_LOCAL :
          result = service->is_local;
          break;
      case IPPFIND_OP_IS_REMOTE :
          result = !service->is_local;
          break;
      case IPPFIND_OP_DOMAIN_REGEX :
          result = !regexec(&(expression->re), service->domain, 0, NULL, 0);
          break;
      case IPPFIND_OP_NAME_REGEX :
          result = !regexec(&(expression->re), service->name, 0, NULL, 0);
          break;
      case IPPFIND_OP_NAME_LITERAL :
          result = !_cups_strcasecmp(expression->name, service->name);
          break;
      case IPPFIND_OP_HOST_REGEX :
          result = !regexec(&(expression->re), service->host, 0, NULL, 0);
          break;
      case IPPFIND_OP_PORT_RANGE :
          result = service->port >= expression->range[0] &&
                   service->port <= expression->range[1];
          break;