1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2005 Simon Bouvier-Zappa
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 ?
49 * - specify wich hook function will be used to call the core filter
61 * filters the file input from user
62 * @param hook_data the hook data
63 * @return success/failure of operation
65 void filter_analyze_file(void *hook_data
) {
67 // g_print("textFilter::filter_analyze_file\n");
69 LttvAttributeValue value
;
71 LttvIAttribute
*attributes
= LTTV_IATTRIBUTE(lttv_global_attributes());
74 * User may specify filtering options through static file
75 * and/or command line string. From these sources, an
76 * option string is rebuilded and sent to the filter core
78 if(!g_file_test(a_file_name
,G_FILE_TEST_EXISTS
)) {
79 g_warning("file %s does not exist", a_file_name
);
83 char* a_file_content
= NULL
;
85 g_file_get_contents(a_file_name
,&a_file_content
,NULL
,NULL
);
87 g_assert(lttv_iattribute_find_by_path(attributes
, "filter/expression",
88 LTTV_POINTER
, &value
));
90 if(((GString
*)*(value
.v_pointer
))->len
!= 0) g_string_append_c((GString
*)*(value
.v_pointer
),'&');
91 g_string_append_c((GString
*)*(value
.v_pointer
),'(');
92 g_string_append((GString
*)*(value
.v_pointer
),a_file_content
);
93 g_string_append_c((GString
*)*(value
.v_pointer
),')');
98 * filters the string input from user
99 * @param hook_data the hook data
100 * @return success/failure of operation
102 void filter_analyze_string(void *hook_data
) {
104 // g_print("textFilter::filter_analyze_string\n");
106 LttvAttributeValue value
;
108 LttvIAttribute
*attributes
= LTTV_IATTRIBUTE(lttv_global_attributes());
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
115 g_assert(lttv_iattribute_find_by_path(attributes
, "filter/expression",
116 LTTV_POINTER
, &value
));
118 if(((GString
*)*(value
.v_pointer
))->len
!= 0) g_string_append_c((GString
*)*(value
.v_pointer
),'&');
119 g_string_append_c((GString
*)*(value
.v_pointer
),'(');
120 g_string_append((GString
*)*(value
.v_pointer
),a_string
);
121 g_string_append_c((GString
*)*(value
.v_pointer
),')');
126 * initialize the new module
130 // g_print("textFilter::init()\n"); /* debug */
132 LttvAttributeValue value
;
134 LttvIAttribute
*attributes
= LTTV_IATTRIBUTE(lttv_global_attributes());
136 g_assert(lttv_iattribute_find_by_path(attributes
, "filter/expression",
137 LTTV_POINTER
, &value
));
139 *(value
.v_pointer
) = g_string_new("");
141 g_info("Init textFilter.c");
144 lttv_option_add("expression", 'e',
145 "filters a string issued by the user on the command line",
147 LTTV_OPT_STRING
, &a_string
, filter_analyze_string
, NULL
);
148 // add function to call for option
151 lttv_option_add("filename", 'f',
152 "browse the filter options contained in specified file",
154 LTTV_OPT_STRING
, &a_file_name
, filter_analyze_file
, NULL
);
159 * Destroy the current module
161 static void destroy() {
162 g_info("Destroy textFilter");
164 lttv_option_remove("expression");
166 lttv_option_remove("filename");
168 LttvAttributeValue value
;
170 LttvIAttribute
*attributes
= LTTV_IATTRIBUTE(lttv_global_attributes());
172 g_assert(lttv_iattribute_find_by_path(attributes
, "filter/expression",
173 LTTV_POINTER
, &value
));
175 g_string_free((GString
*)*(value
.v_pointer
),TRUE
);
180 LTTV_MODULE("textFilter", "Filters traces", \
181 "Filter the trace following commands issued by user input", \
182 init
, destroy
, "option")
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