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1 | /* This file is part of the Linux Trace Toolkit viewer |
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2 | * Copyright (C) 2005 Simon Bouvier-Zappa |
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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 | |
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19 | /*! \file lttv/modules/text/textFilter.c |
20 | * \brief Textual prompt for user filtering expression. |
21 | * |
22 | * The text filter facility will prompt for user filter option |
23 | * and transmit them to the lttv core. User can either specify |
24 | * a filtering string with the command line or/and specify a |
25 | * file containing filtering expressions. |
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26 | */ |
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27 | |
28 | #include <lttv/lttv.h> |
29 | #include <lttv/option.h> |
30 | #include <lttv/module.h> |
31 | #include <lttv/hook.h> |
32 | #include <lttv/attribute.h> |
33 | #include <lttv/iattribute.h> |
34 | #include <lttv/stats.h> |
35 | #include <lttv/filter.h> |
36 | #include <ltt/ltt.h> |
37 | #include <ltt/event.h> |
38 | #include <ltt/type.h> |
39 | #include <ltt/trace.h> |
40 | #include <ltt/facility.h> |
41 | #include <stdio.h> |
42 | |
43 | /* Insert the hooks before and after each trace and tracefile, and for each |
44 | event. Print a global header. */ |
45 | |
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46 | /* |
47 | * YET TO BE ANSWERED ! |
48 | * - why does this module need dependency with batchAnalysis ? |
49 | */ |
50 | |
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51 | /* |
52 | * TODO |
53 | * - specify wich hook function will be used to call the core filter |
54 | */ |
55 | |
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56 | static char |
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57 | *a_file_name = NULL, |
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58 | *a_string = NULL; |
59 | |
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60 | static LttvHooks |
61 | *before_traceset, |
62 | *event_hook; |
63 | |
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64 | /** |
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65 | * filters the file input from user |
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66 | * @param hook_data the hook data |
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67 | * @return success/failure of operation |
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68 | */ |
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69 | void filter_analyze_file(void *hook_data) { |
70 | |
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71 | LttvAttributeValue value; |
72 | |
73 | LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes()); |
74 | |
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75 | /* |
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76 | * User may specify filtering options through static file |
77 | * and/or command line string. From these sources, an |
78 | * option string is rebuilded and sent to the filter core |
79 | */ |
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80 | if(!g_file_test(a_file_name,G_FILE_TEST_EXISTS)) { |
81 | g_warning("file %s does not exist", a_file_name); |
82 | return; |
83 | } |
84 | |
85 | char* a_file_content = NULL; |
86 | |
87 | g_file_get_contents(a_file_name,&a_file_content,NULL,NULL); |
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88 | |
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89 | g_assert(lttv_iattribute_find_by_path(attributes, "filter/expression", |
90 | LTTV_POINTER, &value)); |
91 | |
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92 | if(((GString*)*(value.v_pointer))->len != 0) g_string_append_c((GString*)*(value.v_pointer),'&'); |
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93 | g_string_append_c((GString*)*(value.v_pointer),'('); |
94 | g_string_append((GString*)*(value.v_pointer),a_file_content); |
95 | g_string_append_c((GString*)*(value.v_pointer),')'); |
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96 | |
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97 | } |
98 | |
99 | /** |
100 | * filters the string input from user |
101 | * @param hook_data the hook data |
102 | * @return success/failure of operation |
103 | */ |
104 | void filter_analyze_string(void *hook_data) { |
105 | |
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106 | LttvAttributeValue value; |
107 | |
108 | LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes()); |
109 | |
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110 | /* |
111 | * User may specify filtering options through static file |
112 | * and/or command line string. From these sources, an |
113 | * option string is rebuilded and sent to the filter core |
114 | */ |
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115 | g_assert(lttv_iattribute_find_by_path(attributes, "filter/expression", |
116 | LTTV_POINTER, &value)); |
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117 | |
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118 | if(((GString*)*(value.v_pointer))->len != 0) g_string_append_c((GString*)*(value.v_pointer),'&'); |
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119 | g_string_append_c((GString*)*(value.v_pointer),'('); |
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120 | g_string_append((GString*)*(value.v_pointer),a_string); |
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121 | g_string_append_c((GString*)*(value.v_pointer),')'); |
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122 | |
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123 | } |
124 | |
125 | /** |
126 | * initialize the new module |
127 | */ |
128 | static void init() { |
129 | |
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130 | LttvAttributeValue value; |
131 | |
132 | LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes()); |
133 | |
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134 | g_assert(lttv_iattribute_find_by_path(attributes, "filter/expression", |
135 | LTTV_POINTER, &value)); |
136 | |
137 | *(value.v_pointer) = g_string_new(""); |
138 | |
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139 | g_info("Init textFilter.c"); |
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140 | |
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141 | a_string = NULL; |
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142 | lttv_option_add("expression", 'e', |
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143 | "filters a string issued by the user on the command line", |
144 | "string", |
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145 | LTTV_OPT_STRING, &a_string, filter_analyze_string, NULL); |
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146 | // add function to call for option |
147 | |
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148 | a_file_name = NULL; |
149 | lttv_option_add("filename", 'f', |
150 | "browse the filter options contained in specified file", |
151 | "file name", |
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152 | LTTV_OPT_STRING, &a_file_name, filter_analyze_file, NULL); |
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153 | |
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154 | } |
155 | |
156 | /** |
157 | * Destroy the current module |
158 | */ |
159 | static void destroy() { |
160 | g_info("Destroy textFilter"); |
161 | |
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162 | lttv_option_remove("expression"); |
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163 | |
164 | lttv_option_remove("filename"); |
165 | |
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166 | LttvAttributeValue value; |
167 | |
168 | LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes()); |
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169 | |
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170 | g_assert(lttv_iattribute_find_by_path(attributes, "filter/expression", |
171 | LTTV_POINTER, &value)); |
172 | |
173 | g_string_free((GString*)*(value.v_pointer),TRUE); |
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174 | |
175 | } |
176 | |
177 | |
178 | LTTV_MODULE("textFilter", "Filters traces", \ |
179 | "Filter the trace following commands issued by user input", \ |
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180 | init, destroy, "option") |
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181 | |