src/common/filter/filter-visitor-ir-check-binary-op-nesting.cpp

   1 /*
   2  * filter-visitor-ir-check-binary-op-nesting.c
   3  *
   4  * LTTng filter IR check binary op nesting
   5  *
   6  * Copyright 2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * SPDX-License-Identifier: LGPL-2.1-only
   9  *
  10  */
  11
  12 #include "filter-ast.hpp"
  13 #include "filter-ir.hpp"
  14 #include "filter-parser.hpp"
  15
  16 #include <common/compat/errno.hpp>
  17 #include <common/macros.hpp>
  18
  19 #include <inttypes.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25 static int check_bin_op_nesting_recursive(struct ir_op *node, int nesting)
  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_op_nesting_recursive(node->u.root.child, nesting);
  35         case IR_OP_LOAD:
  36                 return 0;
  37         case IR_OP_UNARY:
  38                 return check_bin_op_nesting_recursive(node->u.unary.child, nesting);
  39         case IR_OP_BINARY:
  40         {
  41                 int ret;
  42
  43                 ret = check_bin_op_nesting_recursive(node->u.binary.left, nesting + 1);
  44                 if (ret)
  45                         return ret;
  46                 return check_bin_op_nesting_recursive(node->u.binary.right, nesting + 1);
  47         }
  48         case IR_OP_LOGICAL:
  49         {
  50                 int ret;
  51
  52                 ret = check_bin_op_nesting_recursive(node->u.logical.left, nesting);
  53                 if (ret)
  54                         return ret;
  55                 return check_bin_op_nesting_recursive(node->u.logical.right, nesting);
  56         }
  57         }
  58 }
  59
  60 int filter_visitor_ir_check_binary_op_nesting(struct filter_parser_ctx *ctx)
  61 {
  62         return check_bin_op_nesting_recursive(ctx->ir_root, 0);
  63 }