projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 953192ba MD |
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 | * 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> | |
| 953192ba | 29 | #include "filter-ast.h" |
| 95b9bd90 | 30 | #include "filter-parser.h" |
| 953192ba MD |
31 | #include "filter-ir.h" |
| 32 | ||
| 33 | static | |
| 34 | int check_bin_op_nesting_recursive(struct ir_op *node, int nesting) | |
| 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_op_nesting_recursive(node->u.root.child, | |
| 44 | nesting); | |
| 45 | case IR_OP_LOAD: | |
| 46 | return 0; | |
| 47 | case IR_OP_UNARY: | |
| 48 | return check_bin_op_nesting_recursive(node->u.unary.child, | |
| 49 | nesting); | |
| 50 | case IR_OP_BINARY: | |
| 51 | { | |
| 52 | int ret; | |
| 53 | ||
| 54 | if (nesting > 0) { | |
| 55 | fprintf(stderr, "[error] Nesting of binary operators is not allowed, except for logical operators.\n"); | |
| 56 | return -EINVAL; | |
| 57 | } | |
| 58 | ret = check_bin_op_nesting_recursive(node->u.binary.left, | |
| 59 | nesting++); | |
| 60 | if (ret) | |
| 61 | return ret; | |
| 62 | return check_bin_op_nesting_recursive(node->u.binary.right, | |
| 63 | nesting++); | |
| 64 | } | |
| 65 | case IR_OP_LOGICAL: | |
| 66 | { | |
| 67 | int ret; | |
| 68 | ||
| 69 | ret = check_bin_op_nesting_recursive(node->u.logical.left, | |
| 70 | nesting); | |
| 71 | if (ret) | |
| 72 | return ret; | |
| 73 | return check_bin_op_nesting_recursive(node->u.logical.right, | |
| 74 | nesting); | |
| 75 | } | |
| 76 | } | |
| 77 | } | |
| 78 | ||
| d00c599e | 79 | __attribute__((visibility("hidden"))) |
| 953192ba MD |
80 | int filter_visitor_ir_check_binary_op_nesting(struct filter_parser_ctx *ctx) |
| 81 | { | |
| 82 | return check_bin_op_nesting_recursive(ctx->ir_root, 0); | |
| 83 | } |