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 <inttypes.h>
  17
  18 #include <common/compat/errno.h>
  19
  20 #include "filter-ast.h"
  21 #include "filter-parser.h"
  22 #include "filter-ir.h"
  23
  24 static
  25 int check_bin_comparator(struct ir_op *node)
  26 {
  27         switch (node->op) {
  28         case IR_OP_UNKNOWN:
  29         default:
  30                 fprintf(stderr, "[error] %s: unknown op type\n", __func__);
  31                 return -EINVAL;
  32
  33         case IR_OP_ROOT:
  34                 return check_bin_comparator(node->u.root.child);
  35         case IR_OP_LOAD:
  36                 return 0;
  37         case IR_OP_UNARY:
  38                 return check_bin_comparator(node->u.unary.child);
  39         case IR_OP_BINARY:
  40         {
  41                 int ret;
  42
  43                 if (node->u.binary.left->data_type == IR_DATA_STRING
  44                                 || node->u.binary.right->data_type
  45                                         == IR_DATA_STRING) {
  46                         if (node->u.binary.type != AST_OP_EQ
  47                                         && node->u.binary.type != AST_OP_NE) {
  48                                 fprintf(stderr, "[error] Only '==' and '!=' comparators are allowed for strings\n");
  49                                 return -EINVAL;
  50                         }
  51                 }
  52
  53                 ret = check_bin_comparator(node->u.binary.left);
  54                 if (ret)
  55                         return ret;
  56                 return check_bin_comparator(node->u.binary.right);
  57         }
  58         case IR_OP_LOGICAL:
  59         {
  60                 int ret;
  61
  62                 ret = check_bin_comparator(node->u.logical.left);
  63                 if (ret)
  64                         return ret;
  65                 return check_bin_comparator(node->u.logical.right);
  66         }
  67         }
  68 }
  69
  70 int filter_visitor_ir_check_binary_comparator(struct filter_parser_ctx *ctx)
  71 {
  72         return check_bin_comparator(ctx->ir_root);
  73 }