1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2003-2004 Michel Dagenais
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;
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.
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,
20 * The text filter facility will prompt for user filter option
21 * and transmit them to the lttv core
24 #include <lttv/lttv.h>
25 #include <lttv/option.h>
26 #include <lttv/module.h>
27 #include <lttv/hook.h>
28 #include <lttv/attribute.h>
29 #include <lttv/iattribute.h>
30 #include <lttv/stats.h>
31 #include <lttv/filter.h>
33 #include <ltt/event.h>
35 #include <ltt/trace.h>
36 #include <ltt/facility.h>
39 /* Insert the hooks before and after each trace and tracefile, and for each
40 event. Print a global header. */
43 * YET TO BE ANSWERED !
44 * - why does this module need dependency with batchAnalysis ?
52 *a_filter_string
= NULL
;
63 * filters the file input from user
64 * @param hook_data the hook data
65 * @return success/failure of operation
67 void filter_analyze_file(void *hook_data
) {
69 g_print("textFilter::filter_analyze_file\n");
72 * User may specify filtering options through static file
73 * and/or command line string. From these sources, an
74 * option string is rebuilded and sent to the filter core
76 a_file
= fopen(a_file_name
, "r");
78 g_warning("file %s does not exist", a_file_name
);
83 fscanf(a_file
,"%s",tmp
);
85 if(!a_filter_string
->len
) {
86 g_string_append(a_filter_string
,tmp
);
89 g_string_append(a_filter_string
,"&"); /*conjonction between expression*/
90 g_string_append(a_filter_string
,tmp
);
97 * filters the string input from user
98 * @param hook_data the hook data
99 * @return success/failure of operation
101 void filter_analyze_string(void *hook_data
) {
103 g_print("textFilter::filter_analyze_string\n");
106 * User may specify filtering options through static file
107 * and/or command line string. From these sources, an
108 * option string is rebuilded and sent to the filter core
110 if(!a_filter_string
->len
) {
111 g_string_append(a_filter_string
,a_string
);
112 lttv_filter_new(a_filter_string
,NULL
);
115 g_string_append(a_filter_string
,"&"); /*conjonction between expression*/
116 g_string_append(a_filter_string
,a_string
);
122 * filter to current event depending on the
123 * filter options tree
124 * @param hook_data the hook data
125 * @param call_data the call data
126 * @return success/error of operation
128 static gboolean
filter_event_content(void *hook_data
, void *call_data
) {
130 g_print("textFilter::filter_event_content\n"); /* debug */
134 * initialize the new module
138 g_print("textFilter::init()\n"); /* debug */
140 a_filter_string
= g_string_new("");
142 LttvAttributeValue value
;
144 LttvIAttribute
*attributes
= LTTV_IATTRIBUTE(lttv_global_attributes());
146 g_info("Init textFilter.c");
149 lttv_option_add("string", 's',
150 "filters a string issued by the user on the command line",
152 LTTV_OPT_STRING
, &a_string
, filter_analyze_string
, NULL
);
153 // add function to call for option
156 lttv_option_add("filename", 'f',
157 "browse the filter options contained in specified file",
159 LTTV_OPT_STRING
, &a_file_name
, filter_analyze_file
, NULL
);
163 * LttvAttributeValue::v_pointer is a gpointer* --> void**
164 * see union LttvAttributeValue for more info
166 g_assert(lttv_iattribute_find_by_path(attributes
, "hooks/event",
167 LTTV_POINTER
, &value
));
168 g_assert((event_hook
= *(value
.v_pointer
)) != NULL
);
169 lttv_hooks_add(event_hook
, filter_event_content
, NULL
, LTTV_PRIO_DEFAULT
);
171 // g_assert(lttv_iattribute_find_by_path(attributes,"hooks/trace/before",
172 // LTTV_POINTER, &value));
173 // g_assert((before_traceset = *(value.v_pointer)) != NULL);
174 // lttv_hooks_add(before_traceset, parse_filter_options, NULL, LTTV_PRIO_DEFAULT);
180 * Destroy the current module
182 static void destroy() {
183 g_info("Destroy textFilter");
185 lttv_option_remove("string");
187 lttv_option_remove("filename");
189 lttv_hooks_remove_data(event_hook
, filter_event_content
, NULL
);
191 // lttv_hooks_remove_data(before_traceset, parse_filter_options, NULL);
196 LTTV_MODULE("textFilter", "Filters traces", \
197 "Filter the trace following commands issued by user input", \
198 init
, destroy
, "batchAnalysis", "option")
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