added the module text/textFilter

git-svn-id: http://ltt.polymtl.ca/svn@865 04897980-b3bd-0310-b5e0-8ef037075253

diff --git a/ltt/branches/poly/lttv/modules/text/textFilter.c b/ltt/branches/poly/lttv/modules/text/textFilter.c
new file mode 100644 (file)
index 0000000..41d3ad1
--- /dev/null
+++ b/ltt/branches/poly/lttv/modules/text/textFilter.c
@@ -0,0 +1,173 @@
+/* This file is part of the Linux Trace Toolkit viewer
+ * Copyright (C) 2003-2004 Michel Dagenais
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License Version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, 
+ * MA 02111-1307, USA.
+ */
+
+/* The text filter facility will prompt for user filter option 
+ * and transmit them to the lttv core */
+
+#include <lttv/lttv.h>
+#include <lttv/option.h>
+#include <lttv/module.h>
+#include <lttv/hook.h>
+#include <lttv/attribute.h>
+#include <lttv/iattribute.h>
+#include <lttv/stats.h>
+#include <lttv/filter.h>
+#include <ltt/ltt.h>
+#include <ltt/event.h>
+#include <ltt/type.h>
+#include <ltt/trace.h>
+#include <ltt/facility.h>
+#include <stdio.h>
+
+/* Insert the hooks before and after each trace and tracefile, and for each
+   event. Print a global header. */
+
+static char
+  *a_file_name = NULL,
+  *a_filter_string = NULL;
+
+static LttvHooks
+  *before_traceset,
+  *event_hook;
+
+static FILE *a_file;
+
+/**
+ * analyses user filter options and issues the filter string
+ * to the core
+ * @param hook_data the hook data
+ * @param call_data the call data
+ */
+static void parse_filter_options(void *hook_data, void *call_data) {
+
+       char* parsed_string=NULL;       /* the string compiled from user's input */ 
+       
+       /* debug */
+       g_print("textFilter::parse_filter_options\n");  
+       
+       /* recovering hooks data */
+       LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
+
+       LttvTracefileState *tfs = (LttvTracefileState *)call_data;
+
+       LttvTrace* lt = tfc->t_context->vt;
+       
+       /* hook header */
+       g_info("TextFilter options parser");
+       
+       /*
+        *      User may specify filtering options through static file
+        *      and/or command line string.  From these sources, an 
+        *      option string is rebuilded and sent to the filter core
+        */
+       if(a_file_name != NULL) {       /* -f switch in use */
+               a_file = fopen(a_file_name, "r"); 
+               if(a_file == NULL) 
+                       g_error("textFilter::parse_filter_content() cannot open file %s", a_file_name);
+
+               fscanf(a_file,"%s",parsed_string);
+               
+               fclose(a_file);
+       }
+       if(a_filter_string != NULL)     /* -s switch in use */
+               parsed_string = a_filter_string;        
+
+       if(parsed_string==NULL) 
+               g_warning("textFilter::parser_filter_options() no filtering options specified !"); 
+
+       /*      send the filtering string to the core   */
+       lttv_filter_new(parsed_string,lt);      
+       
+}
+
+/**
+ * filter to current event depending on the 
+ * filter options tree
+ * @param hook_data the hook data
+ * @param call_data the call data
+ * @return success/error of operation
+ */
+static gboolean filter_event_content(void *hook_data, void *call_data) {
+
+       g_print("textFilter::filter_event_content\n");  /* debug */
+}
+
+/**
+ *     initialize the new module
+ */
+static void init() {
+  
+  g_print("textFilter::init()");       /* debug */
+       
+  LttvAttributeValue value;
+
+  LttvIAttribute *attributes = LTTV_IATTRIBUTE(lttv_global_attributes());
+
+  g_info("Init textFilter.c");
+  
+  a_filter_string = NULL;
+  lttv_option_add("string", 's', 
+      "filters a string issued by the user on the command line", 
+      "string", 
+      LTTV_OPT_STRING, &a_filter_string, NULL, NULL);
+
+  a_file_name = NULL;
+  lttv_option_add("filename", 'f', 
+      "browse the filter options contained in specified file", 
+      "file name", 
+      LTTV_OPT_STRING, &a_file_name, NULL, NULL);
+  
+  /*
+   *   Note to myself !
+   *   LttvAttributeValue::v_pointer is a gpointer* --> void**
+   *   see union LttvAttributeValue for more info 
+   */
+  g_assert(lttv_iattribute_find_by_path(attributes, "hooks/event",
+      LTTV_POINTER, &value));
+  g_assert((event_hook = *(value.v_pointer)) != NULL);
+  lttv_hooks_add(event_hook, filter_event_content, NULL, LTTV_PRIO_DEFAULT);
+
+  g_assert(lttv_iattribute_find_by_path(attributes,"hooks/trace/before",
+       LTTV_POINTER, &value));
+  g_assert((before_traceset = *(value.v_pointer)) != NULL);
+  lttv_hooks_add(before_traceset, parse_filter_options, NULL, LTTV_PRIO_DEFAULT);
+
+  
+}
+
+/**
+ *     Destroy the current module
+ */
+static void destroy() {
+  g_info("Destroy textFilter");
+
+  lttv_option_remove("string");
+
+  lttv_option_remove("filename");
+
+  lttv_hooks_remove_data(event_hook, filter_event_content, NULL);
+
+  lttv_hooks_remove_data(before_traceset, parse_filter_options, NULL);
+  
+}
+
+
+LTTV_MODULE("textFilter", "Filters traces", \
+           "Filter the trace following commands issued by user input", \
+           init, destroy, "batchAnalysis", "option")
+