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 ?
49 * - specify wich hook function will be used to call the core filter
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");
71 LttvAttributeValue value
;
73 LttvIAttribute
*attributes
= LTTV_IATTRIBUTE(lttv_global_attributes());
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
80 GString
* a_file_content
= g_string_new("");
81 a_file
= fopen(a_file_name
, "r");
83 g_warning("file %s does not exist", a_file_name
);
90 while(!feof(a_file
)) {
91 len
= getline(&line
,&len
,a_file
);
92 g_string_append(a_file_content
,line
);
96 g_assert(lttv_iattribute_find_by_path(attributes
, "filter/expression",
97 LTTV_POINTER
, &value
));
99 if(((GString
*)*(value
.v_pointer
))->len
!= 0) g_string_append_c((GString
*)*(value
.v_pointer
),'&');
100 g_string_append((GString
*)*(value
.v_pointer
),a_file_content
->str
);
106 * filters the string input from user
107 * @param hook_data the hook data
108 * @return success/failure of operation
110 void filter_analyze_string(void *hook_data
) {
112 g_print("textFilter::filter_analyze_string\n");
114 LttvAttributeValue value
;
116 LttvIAttribute
*attributes
= LTTV_IATTRIBUTE(lttv_global_attributes());
119 * User may specify filtering options through static file
120 * and/or command line string. From these sources, an
121 * option string is rebuilded and sent to the filter core
123 /* if(a_filter_string==NULL) {
124 a_filter_string = g_string_new("");
125 g_string_append(a_filter_string,a_string);
128 g_string_append(a_filter_string,"&");
129 g_string_append(a_filter_string,a_string);
133 g_assert(lttv_iattribute_find_by_path(attributes
, "filter/expression",
134 LTTV_POINTER
, &value
));
136 if(((GString
*)*(value
.v_pointer
))->len
!= 0) g_string_append_c((GString
*)*(value
.v_pointer
),'&');
137 g_string_append((GString
*)*(value
.v_pointer
),a_string
);
139 LttvFilter
* filter
= lttv_filter_new();
140 lttv_filter_append_expression(filter
,a_string
);
144 * initialize the new module
148 g_print("textFilter::init()\n"); /* debug */
150 LttvAttributeValue value
;
152 LttvIAttribute
*attributes
= LTTV_IATTRIBUTE(lttv_global_attributes());
154 g_assert(lttv_iattribute_find_by_path(attributes
, "filter/expression",
155 LTTV_POINTER
, &value
));
157 *(value
.v_pointer
) = g_string_new("");
159 g_info("Init textFilter.c");
162 lttv_option_add("expression", 'e',
163 "filters a string issued by the user on the command line",
165 LTTV_OPT_STRING
, &a_string
, filter_analyze_string
, NULL
);
166 // add function to call for option
169 lttv_option_add("filename", 'f',
170 "browse the filter options contained in specified file",
172 LTTV_OPT_STRING
, &a_file_name
, filter_analyze_file
, NULL
);
177 * Destroy the current module
179 static void destroy() {
180 g_info("Destroy textFilter");
182 lttv_option_remove("expression");
184 lttv_option_remove("filename");
186 LttvAttributeValue value
;
188 LttvIAttribute
*attributes
= LTTV_IATTRIBUTE(lttv_global_attributes());
190 g_assert(lttv_iattribute_find_by_path(attributes
, "filter/expression",
191 LTTV_POINTER
, &value
));
193 g_string_free((GString
*)*(value
.v_pointer
),TRUE
);
198 LTTV_MODULE("textFilter", "Filters traces", \
199 "Filter the trace following commands issued by user input", \
200 init
, destroy
, "option")
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