| 1 | /* This file is part of the Linux Trace Toolkit viewer |
| 2 | * Copyright (C) 2003-2004 Michel Dagenais |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License Version 2 as |
| 6 | * published by the Free Software Foundation; |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 16 | * MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | /* |
| 20 | consist in AND, OR and NOT nested expressions, forming a tree with |
| 21 | simple relations as leaves. The simple relations test is a field |
| 22 | in an event is equal, not equal, smaller, smaller or equal, larger, or |
| 23 | larger or equal to a specified value. */ |
| 24 | |
| 25 | #include <lttv/filter.h> |
| 26 | |
| 27 | typedef enum _lttv_expression_op |
| 28 | { LTTV_FIELD_EQ, |
| 29 | LTTV_FIELD_NE, |
| 30 | LTTV_FIELD_LT, |
| 31 | LTTV_FIELD_LE, |
| 32 | LTTV_FIELD_GT, |
| 33 | LTTV_FIELD_GE |
| 34 | } lttv_expression_op; |
| 35 | |
| 36 | typedef enum _lttv_expression_type |
| 37 | { |
| 38 | LTTV_EXPRESSION, |
| 39 | LTTV_SIMPLE_EXPRESSION |
| 40 | } lttv_expression_type; |
| 41 | |
| 42 | typedef struct _lttv_simple_expression |
| 43 | { |
| 44 | lttv_expression_op op; |
| 45 | char *field_name; |
| 46 | char *value; |
| 47 | } lttv_simple_expression; |
| 48 | |
| 49 | typedef struct _lttv_expression |
| 50 | { |
| 51 | gboolean or; |
| 52 | gboolean not; |
| 53 | gboolean simple_expression; |
| 54 | // union e |
| 55 | // { |
| 56 | // lttv_expression *e; |
| 57 | // lttv_field_relation *se; |
| 58 | // }; |
| 59 | } lttv_expression; |
| 60 | |
| 61 | /* |
| 62 | read_token |
| 63 | |
| 64 | read_expression |
| 65 | ( read expr ) |
| 66 | simple expr [ op expr ] |
| 67 | |
| 68 | read_simple_expression |
| 69 | read_field_path [ rel value ] |
| 70 | |
| 71 | read_field_path |
| 72 | read_field_component [. field path] |
| 73 | |
| 74 | read_field_component |
| 75 | name [ \[ value \] ] |
| 76 | |
| 77 | data struct: |
| 78 | and/or(left/right) |
| 79 | not(child) |
| 80 | op(left/right) |
| 81 | path(component...) -> field |
| 82 | */ |
| 83 | |
| 84 | /** |
| 85 | * create a new lttv_filter |
| 86 | * @param expression filtering options string |
| 87 | * @param t pointer to the current LttvTrace |
| 88 | * @return the current lttv_filter |
| 89 | */ |
| 90 | lttv_filter* |
| 91 | lttv_filter_new(char *expression, LttvTrace *t) { |
| 92 | |
| 93 | g_print("filter::lttv_filter_new()\n"); /* debug */ |
| 94 | |
| 95 | /* |
| 96 | * 1. parse expression |
| 97 | * 2. construct binary tree |
| 98 | * 3. return corresponding filter |
| 99 | */ |
| 100 | |
| 101 | |
| 102 | } |
| 103 | |
| 104 | gboolean |
| 105 | lttv_filter_tracefile(lttv_filter *filter, void *tracefile) { |
| 106 | |
| 107 | } |
| 108 | |
| 109 | gboolean |
| 110 | lttv_filter_event(lttv_filter *filter, void *event) { |
| 111 | |
| 112 | } |