src/common/filter/filter-visitor-ir-check-binary-comparator.c

   1 /*
   2  * filter-visitor-ir-check-binary-comparator.c
   3  *
   4  * LTTng filter IR check binary comparator
   5  *
   6  * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * SPDX-License-Identifier: LGPL-2.1-only
   9  *
  10  */
  11
  12 #include <stdio.h>
  13 #include <unistd.h>
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <assert.h>
  17 #include <inttypes.h>
  18
  19 #include <common/compat/errno.h>
  20
  21 #include "filter-ast.h"
  22 #include "filter-parser.h"
  23 #include "filter-ir.h"
  24
  25 static
  26 int check_bin_comparator(struct ir_op *node)
  27 {
  28         switch (node->op) {
  29         case IR_OP_UNKNOWN:
  30         default:
  31                 fprintf(stderr, "[error] %s: unknown op type\n", __func__);
  32                 return -EINVAL;
  33
  34         case IR_OP_ROOT:
  35                 return check_bin_comparator(node->u.root.child);
  36         case IR_OP_LOAD:
  37                 return 0;
  38         case IR_OP_UNARY:
  39                 return check_bin_comparator(node->u.unary.child);
  40         case IR_OP_BINARY:
  41         {
  42                 int ret;
  43
  44                 if (node->u.binary.left->data_type == IR_DATA_STRING
  45                                 || node->u.binary.right->data_type
  46                                         == IR_DATA_STRING) {
  47                         if (node->u.binary.type != AST_OP_EQ
  48                                         && node->u.binary.type != AST_OP_NE) {
  49                                 fprintf(stderr, "[error] Only '==' and '!=' comparators are allowed for strings\n");
  50                                 return -EINVAL;
  51                         }
  52                 }
  53
  54                 ret = check_bin_comparator(node->u.binary.left);
  55                 if (ret)
  56                         return ret;
  57                 return check_bin_comparator(node->u.binary.right);
  58         }
  59         case IR_OP_LOGICAL:
  60         {
  61                 int ret;
  62
  63                 ret = check_bin_comparator(node->u.logical.left);
  64                 if (ret)
  65                         return ret;
  66                 return check_bin_comparator(node->u.logical.right);
  67         }
  68         }
  69 }
  70
  71 int filter_visitor_ir_check_binary_comparator(struct filter_parser_ctx *ctx)
  72 {
  73         return check_bin_comparator(ctx->ir_root);
  74 }