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 <stdio.h>
  13 #include <unistd.h>
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <inttypes.h>
  17 #include "filter-ast.hpp"
  18 #include "filter-parser.hpp"
  19 #include "filter-ir.hpp"
  20
  21 #include <common/compat/errno.hpp>
  22 #include <common/macros.hpp>
  23
  24 static
  25 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,
  35                                 nesting);
  36         case IR_OP_LOAD:
  37                 return 0;
  38         case IR_OP_UNARY:
  39                 return check_bin_op_nesting_recursive(node->u.unary.child,
  40                                 nesting);
  41         case IR_OP_BINARY:
  42         {
  43                 int ret;
  44
  45                 ret = check_bin_op_nesting_recursive(node->u.binary.left,
  46                                 nesting + 1);
  47                 if (ret)
  48                         return ret;
  49                 return check_bin_op_nesting_recursive(node->u.binary.right,
  50                                 nesting + 1);
  51         }
  52         case IR_OP_LOGICAL:
  53         {
  54                 int ret;
  55
  56                 ret = check_bin_op_nesting_recursive(node->u.logical.left,
  57                                 nesting);
  58                 if (ret)
  59                         return ret;
  60                 return check_bin_op_nesting_recursive(node->u.logical.right,
  61                                 nesting);
  62         }
  63         }
  64 }
  65
  66 int filter_visitor_ir_check_binary_op_nesting(struct filter_parser_ctx *ctx)
  67 {
  68         return check_bin_op_nesting_recursive(ctx->ir_root, 0);
  69 }