| 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 | * This library is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU Lesser General Public License, version 2.1 only, |
| 10 | * as published by the Free Software Foundation. |
| 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public License |
| 18 | * along with this library; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include <unistd.h> |
| 24 | #include <string.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <assert.h> |
| 27 | #include <errno.h> |
| 28 | #include <inttypes.h> |
| 29 | #include "filter-ast.h" |
| 30 | #include "filter-parser.h" |
| 31 | #include "filter-ir.h" |
| 32 | |
| 33 | static |
| 34 | int check_bin_comparator(struct ir_op *node) |
| 35 | { |
| 36 | switch (node->op) { |
| 37 | case IR_OP_UNKNOWN: |
| 38 | default: |
| 39 | fprintf(stderr, "[error] %s: unknown op type\n", __func__); |
| 40 | return -EINVAL; |
| 41 | |
| 42 | case IR_OP_ROOT: |
| 43 | return check_bin_comparator(node->u.root.child); |
| 44 | case IR_OP_LOAD: |
| 45 | return 0; |
| 46 | case IR_OP_UNARY: |
| 47 | return check_bin_comparator(node->u.unary.child); |
| 48 | case IR_OP_BINARY: |
| 49 | { |
| 50 | int ret; |
| 51 | |
| 52 | if (node->u.binary.left->data_type == IR_DATA_STRING |
| 53 | || node->u.binary.right->data_type |
| 54 | == IR_DATA_STRING) { |
| 55 | if (node->u.binary.type != AST_OP_EQ |
| 56 | && node->u.binary.type != AST_OP_NE) { |
| 57 | fprintf(stderr, "[error] Only '==' and '!=' comparators are allowed for strings\n"); |
| 58 | return -EINVAL; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | ret = check_bin_comparator(node->u.binary.left); |
| 63 | if (ret) |
| 64 | return ret; |
| 65 | return check_bin_comparator(node->u.binary.right); |
| 66 | } |
| 67 | case IR_OP_LOGICAL: |
| 68 | { |
| 69 | int ret; |
| 70 | |
| 71 | ret = check_bin_comparator(node->u.logical.left); |
| 72 | if (ret) |
| 73 | return ret; |
| 74 | return check_bin_comparator(node->u.logical.right); |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | int filter_visitor_ir_check_binary_comparator(struct filter_parser_ctx *ctx) |
| 80 | { |
| 81 | return check_bin_comparator(ctx->ir_root); |
| 82 | } |