Add config.h support : will fix the LARGEFILE problem
[lttv.git] / ltt / branches / poly / ltt / tracefile.c
index 6cf54a089bc076c9d5184d9dd652fc456c2bc69c..a111e41fd3a706c323636ed24e366f833f2c6fb1 100644 (file)
@@ -1,5 +1,5 @@
 /* This file is part of the Linux Trace Toolkit viewer
- * Copyright (C) 2003-2004 Xiangxiu Yang
+ * Copyright (C) 2003-2004 Xiangxiu Yang, Mathieu Desnoyers
  *
  * 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
  * MA 02111-1307, USA.
  */
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include <stdio.h>
 #include <fcntl.h>
 #include <string.h>
@@ -24,6 +28,8 @@
 #include <sys/types.h>
 #include <errno.h>
 #include <unistd.h>
+#include <math.h>
+#include <glib.h>
 
 // For realpath
 #include <limits.h>
 #include <ltt/facility.h>
 #include <ltt/event.h>
 #include <ltt/type.h>
+#include <ltt/ltt-types.h>
+
+#ifndef g_open
+#define g_open open
+#endif
+
 
 #define DIR_NAME_SIZE 256
 #define __UNUSED__ __attribute__((__unused__))
@@ -44,6 +56,7 @@
 #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
 #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
 
+#define g_close close
 
 /* obtain the time of an event */
 
@@ -56,11 +69,12 @@ void setFieldsOffset(LttTracefile *tf,LttEventType *evT,void *evD,LttTrace *t);
 
 /* get the size of the field type according to the archtecture's
    size and endian type(info of the archecture) */
-int getFieldtypeSize(LttTracefile * tf, LttEventType * evT, int offsetRoot,
-                    int offsetParent, LttField *fld, void *evD, LttTrace* t);
+static inline gint getFieldtypeSize(LttTracefile * tf,
+         LttEventType * evT, gint offsetRoot,
+                    gint offsetParent, LttField *fld, void *evD, LttTrace* t);
 
 /* read a fixed size or a block information from the file (fd) */
-int readFile(int fd, void * buf, size_t size, char * mesg);
+int readFile(int fd, void * buf, size_t size, gchar * mesg);
 int readBlock(LttTracefile * tf, int whichBlock);
 
 /* calculate cycles per nsec for current block */
@@ -159,7 +173,7 @@ static void  parser_characters   (GMarkupParseContext __UNUSED__ *context,
  *                       : a pointer to a tracefile
  ****************************************************************************/ 
 
-LttTracefile* ltt_tracefile_open(LttTrace * t, char * fileName)
+LttTracefile* ltt_tracefile_open(LttTrace * t, gchar * fileName)
 {
   LttTracefile * tf;
   struct stat    lTDFStat;    /* Trace data file status */
@@ -169,7 +183,7 @@ LttTracefile* ltt_tracefile_open(LttTrace * t, char * fileName)
   //open the file
   tf->name = g_strdup(fileName);
   tf->trace = t;
-  tf->fd = open(fileName, O_RDONLY, 0);
+  tf->fd = g_open(fileName, O_RDONLY, 0);
   if(tf->fd < 0){
     g_warning("Unable to open input data file %s\n", fileName);
     g_free(tf->name);
@@ -181,7 +195,7 @@ LttTracefile* ltt_tracefile_open(LttTrace * t, char * fileName)
   if(fstat(tf->fd, &lTDFStat) < 0){
     g_warning("Unable to get the status of the input data file %s\n", fileName);
     g_free(tf->name);
-    close(tf->fd);
+    g_close(tf->fd);
     g_free(tf);
     return NULL;
   }
@@ -190,7 +204,7 @@ LttTracefile* ltt_tracefile_open(LttTrace * t, char * fileName)
   if(lTDFStat.st_size < (off_t)(sizeof(BlockStart) + EVENT_HEADER_SIZE)){
     g_print("The input data file %s does not contain a trace\n", fileName);
     g_free(tf->name);
-    close(tf->fd);
+    g_close(tf->fd);
     g_free(tf);
     return NULL;
   }
@@ -202,7 +216,7 @@ LttTracefile* ltt_tracefile_open(LttTrace * t, char * fileName)
   tf->which_block = 0;
 
   //allocate memory to contain the info of a block
-  tf->buffer = (void *) g_new(char, t->system_description->ltt_block_size);
+  tf->buffer = (void *) g_new(gchar, t->system_description->ltt_block_size);
 
   //read the first block
   if(readBlock(tf,1)) exit(1);
@@ -215,7 +229,7 @@ LttTracefile* ltt_tracefile_open(LttTrace * t, char * fileName)
  *Open control and per cpu tracefiles
  ****************************************************************************/
 
-void ltt_tracefile_open_cpu(LttTrace *t, char * tracefile_name)
+void ltt_tracefile_open_cpu(LttTrace *t, gchar * tracefile_name)
 {
   LttTracefile * tf;
   tf = ltt_tracefile_open(t,tracefile_name);
@@ -224,7 +238,7 @@ void ltt_tracefile_open_cpu(LttTrace *t, char * tracefile_name)
   g_ptr_array_add(t->per_cpu_tracefiles, tf);
 }
 
-gint ltt_tracefile_open_control(LttTrace *t, char * control_name)
+gint ltt_tracefile_open_control(LttTrace *t, gchar * control_name)
 {
   LttTracefile * tf;
   LttEvent ev;
@@ -248,7 +262,7 @@ gint ltt_tracefile_open_control(LttTrace *t, char * control_name)
 
       if(ev.event_id == TRACE_FACILITY_LOAD){
        pos = ev.data;
-       fLoad.name = (char*)pos;
+       fLoad.name = (gchar*)pos;
        fLoad.checksum = *(LttChecksum*)(pos + strlen(fLoad.name));
        fLoad.base_code = *(guint32 *)(pos + strlen(fLoad.name) + sizeof(LttChecksum));
 
@@ -296,10 +310,12 @@ void ltt_tracefile_close(LttTracefile *t)
 /*****************************************************************************
  *Get system information
  ****************************************************************************/
-gint getSystemInfo(LttSystemDescription* des, char * pathname)
+gint getSystemInfo(LttSystemDescription* des, gchar * pathname)
 {
-  FILE * fp;
-  char buf[DIR_NAME_SIZE];
+  int fd;
+  GIOChannel *iochan;
+  gchar *buf = NULL;
+  gsize length;
 
   GMarkupParseContext * context;
   GError * error = NULL;
@@ -312,27 +328,52 @@ gint getSystemInfo(LttSystemDescription* des, char * pathname)
       NULL   /*  error        */
     };
 
-  fp = fopen(pathname,"r");
-  if(!fp){
+  fd = g_open(pathname, O_RDONLY, 0);
+  if(fd == -1){
     g_warning("Can not open file : %s\n", pathname);
     return -1;
   }
   
+  iochan = g_io_channel_unix_new(fd);
+  
   context = g_markup_parse_context_new(&markup_parser, 0, des,NULL);
   
-  while(fgets(buf,DIR_NAME_SIZE, fp) != NULL){
-    if(!g_markup_parse_context_parse(context, buf, DIR_NAME_SIZE, &error)){
+  //while(fgets(buf,DIR_NAME_SIZE, fp) != NULL){
+  while(g_io_channel_read_line(iochan, &buf, &length, NULL, &error)
+      != G_IO_STATUS_EOF) {
+
+    if(error != NULL) {
+      g_warning("Can not read xml file: \n%s\n", error->message);
+      g_error_free(error);
+    }
+    if(!g_markup_parse_context_parse(context, buf, length, &error)){
       if(error != NULL) {
         g_warning("Can not parse xml file: \n%s\n", error->message);
         g_error_free(error);
       }
       g_markup_parse_context_free(context);
-      fclose(fp);
+
+      g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
+      if(error != NULL) {
+        g_warning("Can not close file: \n%s\n", error->message);
+        g_error_free(error);
+      }
+
+      close(fd);
       return -1;
     }
   }
   g_markup_parse_context_free(context);
-  fclose(fp);
+
+  g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
+  if(error != NULL) {
+    g_warning("Can not close file: \n%s\n", error->message);
+    g_error_free(error);
+  }
+
+  g_close(fd);
+
+  g_free(buf);
   return 0;
 }
 
@@ -340,30 +381,31 @@ gint getSystemInfo(LttSystemDescription* des, char * pathname)
  *The following functions get facility/tracefile information
  ****************************************************************************/
 
-gint getFacilityInfo(LttTrace *t, char* eventdefs)
+gint getFacilityInfo(LttTrace *t, gchar* eventdefs)
 {
-  DIR * dir;
-  struct dirent *entry;
-  char * ptr;
+  GDir * dir;
+  const gchar * name;
   unsigned int i,j;
   LttFacility * f;
   LttEventType * et;
-  char name[DIR_NAME_SIZE];
+  gchar fullname[DIR_NAME_SIZE];
+  GError * error = NULL;
 
-  dir = opendir(eventdefs);
-  if(!dir) {
-    g_warning("Can not open directory: %s\n", eventdefs);
+  dir = g_dir_open(eventdefs, 0, &error);
+
+  if(error != NULL) {
+    g_warning("Can not open directory: %s, %s\n", eventdefs, error->message);
+    g_error_free(error);
     return -1;
   }
 
-  while((entry = readdir(dir)) != NULL){
-    ptr = &entry->d_name[strlen(entry->d_name)-4];
-    if(strcmp(ptr,".xml") != 0) continue;
-    strcpy(name,eventdefs);
-    strcat(name,entry->d_name);
-    ltt_facility_open(t,name);
-  }  
-  closedir(dir);
+  while((name = g_dir_read_name(dir)) != NULL){
+    if(!g_pattern_match_simple("*.xml", name)) continue;
+    strcpy(fullname,eventdefs);
+    strcat(fullname,name);
+    ltt_facility_open(t,fullname);
+  }
+  g_dir_close(dir);
   
   for(j=0;j<t->facility_number;j++){
     f = (LttFacility*)g_ptr_array_index(t->facilities, j);
@@ -375,54 +417,60 @@ gint getFacilityInfo(LttTrace *t, char* eventdefs)
   return 0;
 }
 
-gint getControlFileInfo(LttTrace *t, char* control)
+gint getControlFileInfo(LttTrace *t, gchar* control)
 {
-  DIR * dir;
-  struct dirent *entry;
-  char name[DIR_NAME_SIZE];
+  GDir * dir;
+  const gchar *name;
+  gchar fullname[DIR_NAME_SIZE];
+  GError * error = NULL;
+
+  dir = g_dir_open(control, 0, &error);
 
-  dir = opendir(control);
-  if(!dir) {
-    g_warning("Can not open directory: %s\n", control);
+  if(error != NULL) {
+    g_warning("Can not open directory: %s, %s\n", control, error->message);
+    g_error_free(error);
     return -1;
   }
 
-  while((entry = readdir(dir)) != NULL){
-    if(strcmp(entry->d_name,"facilities") != 0 &&
-       strcmp(entry->d_name,"interrupts") != 0 &&
-       strcmp(entry->d_name,"processes") != 0) continue;
+  while((name = g_dir_read_name(dir)) != NULL){
+    if(strcmp(name,"facilities") != 0 &&
+       strcmp(name,"interrupts") != 0 &&
+       strcmp(name,"processes") != 0) continue;
     
-    strcpy(name,control);
-    strcat(name,entry->d_name);
-    if(ltt_tracefile_open_control(t,name))
+    strcpy(fullname,control);
+    strcat(fullname,name);
+    if(ltt_tracefile_open_control(t,fullname)) {
+      g_dir_close(dir);
       return -1;
+    }
   }  
-  closedir(dir);
+  g_dir_close(dir);
   return 0;
 }
 
 gint getCpuFileInfo(LttTrace *t, char* cpu)
 {
-  DIR * dir;
-  struct dirent *entry;
-  char name[DIR_NAME_SIZE];
+  GDir * dir;
+  const gchar * name;
+  gchar fullname[DIR_NAME_SIZE];
+  GError * error = NULL;
+
+  dir = g_dir_open(cpu, 0, &error);
 
-  dir = opendir(cpu);
-  if(!dir) {
-    g_warning("Can not open directory: %s\n", cpu);
+  if(error != NULL) {
+    g_warning("Can not open directory: %s, %s\n", cpu, error->message);
+    g_error_free(error);
     return -1;
   }
 
-  while((entry = readdir(dir)) != NULL){
-    if(strcmp(entry->d_name,".") != 0 &&
-       strcmp(entry->d_name,"..") != 0 &&
-       strcmp(entry->d_name,".svn") != 0){      
-      strcpy(name,cpu);
-      strcat(name,entry->d_name);
-      ltt_tracefile_open_cpu(t,name);
+  while((name = g_dir_read_name(dir)) != NULL){
+    if(strcmp(name,".svn") != 0){     /* . and .. already excluded */
+      strcpy(fullname,cpu);
+      strcat(fullname,name);
+      ltt_tracefile_open_cpu(t,fullname);
     }else continue;
   }  
-  closedir(dir);
+  g_dir_close(dir);
   return 0;
 }
 
@@ -445,7 +493,7 @@ gint getCpuFileInfo(LttTrace *t, char* cpu)
  * forgotten cases (.. were not used correctly before).
  *
  ****************************************************************************/
-void get_absolute_pathname(const char *pathname, char * abs_pathname)
+void get_absolute_pathname(const gchar *pathname, gchar * abs_pathname)
 {
   abs_pathname[0] = '\0';
 
@@ -460,16 +508,16 @@ void get_absolute_pathname(const char *pathname, char * abs_pathname)
   return;
 }
 
-LttTrace *ltt_trace_open(const char *pathname)
+LttTrace *ltt_trace_open(const gchar *pathname)
 {
   LttTrace  * t;
   LttSystemDescription * sys_description;
-  char eventdefs[DIR_NAME_SIZE];
-  char info[DIR_NAME_SIZE];
-  char control[DIR_NAME_SIZE];
-  char cpu[DIR_NAME_SIZE];
-  char tmp[DIR_NAME_SIZE];
-  char abs_path[DIR_NAME_SIZE];
+  gchar eventdefs[DIR_NAME_SIZE];
+  gchar info[DIR_NAME_SIZE];
+  gchar control[DIR_NAME_SIZE];
+  gchar cpu[DIR_NAME_SIZE];
+  gchar tmp[DIR_NAME_SIZE];
+  gchar abs_path[DIR_NAME_SIZE];
   gboolean has_slash = FALSE;
 
   get_absolute_pathname(pathname, abs_path);
@@ -502,8 +550,8 @@ LttTrace *ltt_trace_open(const char *pathname)
   t->control_tracefiles = g_ptr_array_new();
   t->per_cpu_tracefiles = g_ptr_array_new();
   t->facilities         = g_ptr_array_new();
-  getDataEndianType(&(t->my_arch_size), &(t->my_arch_endian));
-
+  //getDataEndianType(&(t->my_arch_size), &(t->my_arch_endian));
+  
   //get system description  
   strcpy(tmp,info);
   strcat(tmp,"system.xml");
@@ -516,8 +564,15 @@ LttTrace *ltt_trace_open(const char *pathname)
     g_free(t);
     return NULL;
   }
-
-
+  
+  /* Set the reverse byte order between trace and reader */
+  if(sys_description->endian == LTT_LITTLE_ENDIAN 
+          && G_BYTE_ORDER != G_LITTLE_ENDIAN) {
+    t->reverse_byte_order = 1;
+  } else if(sys_description->endian == LTT_BIG_ENDIAN
+          && G_BYTE_ORDER != G_BIG_ENDIAN) {
+    t->reverse_byte_order = 1;
+  } else t->reverse_byte_order = 0;
 
   //get facilities info
   if(getFacilityInfo(t,eventdefs)) {
@@ -680,8 +735,10 @@ unsigned ltt_trace_eventtype_number(LttTrace *t)
 {
   unsigned int i;
   unsigned count = 0;
+  unsigned int num = t->facility_number;
   LttFacility * f;
-  for(i=0;i<t->facility_number;i++){
+  
+  for(i=0;i<num;i++){
     f = (LttFacility*)g_ptr_array_index(t->facilities, i);
     count += f->event_number;
   }
@@ -689,31 +746,43 @@ unsigned ltt_trace_eventtype_number(LttTrace *t)
 }
 
 /* FIXME : performances could be improved with a better design for this
- * function */
+ * function : sequential search through a container has never been the
+ * best on the critical path. */
 LttFacility * ltt_trace_facility_by_id(LttTrace * trace, unsigned id)
 {
   LttFacility * facility = NULL;
   unsigned int i;
+  unsigned int num = trace->facility_number;
+  GPtrArray *facilities = trace->facilities;
 
-  for(i=0;i<trace->facility_number;i++){
+  for(i=0;unlikely(i<num);){
     LttFacility *iter_facility =
-                      (LttFacility*) g_ptr_array_index(trace->facilities,i);
-    if(unlikely(id >= iter_facility->base_id && 
-       id < iter_facility->base_id + iter_facility->event_number)) {
+                      (LttFacility*) g_ptr_array_index(facilities,i);
+    unsigned base_id = iter_facility->base_id;
+
+    if(likely(id >= base_id && 
+       id < base_id + iter_facility->event_number)) {
       facility = iter_facility;
       break;
+    } else {
+      i++;
     }
   }
-
+  
   return facility;
 }
 
 LttEventType *ltt_trace_eventtype_get(LttTrace *t, unsigned evId)
 {
+  LttEventType *event_type;
+  
   LttFacility * f;
   f = ltt_trace_facility_by_id(t,evId);
-  if(!f) return NULL;
-  return f->events[evId - f->base_id];
+
+  if(unlikely(!f)) event_type = NULL;
+  else event_type = f->events[evId - f->base_id];
+
+  return event_type;
 }
 
 /*****************************************************************************
@@ -792,9 +861,9 @@ void ltt_trace_time_span_get(LttTrace *t, LttTime *start, LttTime *end)
   for(i=0;i<t->control_tracefile_number;i++){
     tf = g_ptr_array_index(t->control_tracefiles, i);
     readBlock(tf,1);
-    startTmp = tf->a_block_start->time;    
+    startTmp = ltt_get_time(t->reverse_byte_order, &tf->a_block_start->time);
     readBlock(tf,tf->block_number);
-    endTmp = tf->a_block_end->time;
+    endTmp = ltt_get_time(t->reverse_byte_order, &tf->a_block_end->time);
     if(i==0){
       startSmall = startTmp;
       endBig     = endTmp;
@@ -808,9 +877,9 @@ void ltt_trace_time_span_get(LttTrace *t, LttTime *start, LttTime *end)
   for(i=0;i<t->per_cpu_tracefile_number;i++){
     tf = g_ptr_array_index(t->per_cpu_tracefiles, i);
     readBlock(tf,1);
-    startTmp = tf->a_block_start->time;    
+    startTmp = ltt_get_time(t->reverse_byte_order, &tf->a_block_start->time);
     readBlock(tf,tf->block_number);
-    endTmp = tf->a_block_end->time;
+    endTmp = ltt_get_time(t->reverse_byte_order, &tf->a_block_end->time);
     if(j == 0 && i==0){
       startSmall = startTmp;
       endBig     = endTmp;
@@ -862,22 +931,26 @@ void ltt_tracefile_find_time_block(LttTracefile *t, LttTime time,
   if(err) g_error("Can not read tracefile: %s\n", t->name); 
   if(start_block == end_block)return;
 
-  tailTime = ltt_time_compare(t->a_block_end->time, time);
+  tailTime = ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order,
+                                           &t->a_block_end->time), time);
   if(tailTime >= 0) return;
   
   err=readBlock(t,end_block);
   if(err) g_error("Can not read tracefile: %s\n", t->name); 
   if(start_block+1 == end_block)return;
   
-  headTime = ltt_time_compare(t->a_block_start->time, time);
+  headTime = ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order,
+                                           &t->a_block_start->time), time);
   if(headTime <= 0 ) return;
   
   tmp_block = (end_block + start_block)/2;
   err=readBlock(t,tmp_block);
   if(err) g_error("Can not read tracefile: %s\n", t->name); 
 
-  headTime = ltt_time_compare(t->a_block_start->time, time);
-  tailTime = ltt_time_compare(t->a_block_end->time, time);
+  headTime = ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order,
+                                           &t->a_block_start->time), time);
+  tailTime = ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order,
+                                           &t->a_block_end->time), time);
   if(headTime <= 0 && tailTime >= 0) return;
   
   if(headTime > 0){
@@ -902,14 +975,17 @@ void ltt_tracefile_backward_find_time_block(LttTracefile *t, LttTime time)
   int t_time, h_time, err;
   err=readBlock(t,t->which_block-1);
   if(err) g_error("Can not read tracefile: %s\n", t->name); 
-  h_time = ltt_time_compare(t->a_block_start->time, time);
-  t_time = ltt_time_compare(t->a_block_end->time, time);
+  h_time = ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order,
+                                         &t->a_block_start->time), time);
+  t_time = ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order,
+                                         &t->a_block_end->time), time);
   if(h_time == 0){
     int tmp;
     if(t->which_block == 1) return;
     err=readBlock(t,t->which_block-1);
     if(err) g_error("Can not read tracefile: %s\n", t->name); 
-    tmp = ltt_time_compare(t->a_block_end->time, time);
+    tmp = ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order,
+                                        &t->a_block_end->time), time);
     if(tmp == 0) return ltt_tracefile_seek_time(t, time);
     err=readBlock(t,t->which_block+1);
     if(err) g_error("Can not read tracefile: %s\n", t->name);     
@@ -927,12 +1003,16 @@ void ltt_tracefile_seek_time(LttTracefile *t, LttTime time)
 {
   int err;
   LttTime lttTime;
-  int headTime = ltt_time_compare(t->a_block_start->time, time);
-  int tailTime = ltt_time_compare(t->a_block_end->time, time);
+  int headTime = ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order,
+                                               &t->a_block_start->time), time);
+  int tailTime = ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order,
+                                               &t->a_block_end->time), time);
   LttEvent ev;
 
   if(headTime < 0 && tailTime > 0){
-    if(ltt_time_compare(t->a_block_end->time, t->current_event_time) !=0) {
+    if(ltt_time_compare(ltt_get_time(t->trace->reverse_byte_order, 
+                                     &t->a_block_end->time),
+                        t->current_event_time) !=0) {
       lttTime = getEventTime(t);
       err = ltt_time_compare(lttTime, time);
       if(err > 0){
@@ -1020,6 +1100,8 @@ void ltt_tracefile_seek_position(LttTracefile *t, const LttEventPosition *ep)
     t->prev_event_time = ep->prev_event_time;
     t->pre_cycle_count = ep->pre_cycle_count;
     t->count = ep->count;
+    t->overflow_nsec = ep->overflow_nsec;
+    t->last_heartbeat = ep->last_heartbeat;
     /* end of workaround */
 
     //update the fields of the current event and go to the next event
@@ -1060,19 +1142,19 @@ LttEvent *ltt_tracefile_read(LttTracefile *t, LttEvent *event)
     if(unlikely(err))g_error("Can not read tracefile");    
   }
 
-  event->event_id = (int)(*(guint16 *)(t->cur_event_pos));
+  event->event_id = ltt_get_uint16(t->trace->reverse_byte_order, t->cur_event_pos);
   if(unlikely(event->event_id == TRACE_TIME_HEARTBEAT))
     t->cur_heart_beat_number++;
 
   t->prev_event_time  = t->current_event_time;
   //  t->current_event_time = getEventTime(t);
 
-  event->time_delta = *(guint32 *)(t->cur_event_pos + EVENT_ID_SIZE);
+  event->time_delta = ltt_get_uint32(t->trace->reverse_byte_order, t->cur_event_pos + EVENT_ID_SIZE);
   event->event_time = t->current_event_time;
   event->event_cycle_count = t->cur_cycle_count;
 
   event->tracefile = t;
-  event->data = t->cur_event_pos + EVENT_HEADER_SIZE;  
+  event->data = t->cur_event_pos + EVENT_HEADER_SIZE;
   event->which_block = t->which_block;
   event->which_event = t->which_event;
 
@@ -1082,6 +1164,9 @@ LttEvent *ltt_tracefile_read(LttTracefile *t, LttEvent *event)
   event->prev_event_time = t->prev_event_time;
   event->pre_cycle_count = t->pre_cycle_count;
   event->count = t->count;
+  event->overflow_nsec = t->overflow_nsec;
+  event->last_heartbeat = t->last_heartbeat;
+  
   /* end of workaround */
 
 
@@ -1121,174 +1206,6 @@ int readFile(int fd, void * buf, size_t size, char * mesg)
    return 0;
 }
 
-/*****************************************************************************
- *Function name
- *    skipEvent_pre_read_cycles : go to the next event,
- *             update the necessary fields of the current event
- *             increment the cycle counter, save it at the end.
- *Input params 
- *    t         : tracefile
- *return value 
- *    0               : success
- *    ERANGE          : event id is out of range
- ****************************************************************************/
-
-int skipEvent_pre_read_cycles(LttTracefile * t)
-{
-  int evId;
-  void * evData;
-  LttEventType * evT;
-  LttField * rootFld;
-
-  evId   = (int)(*(guint16 *)(t->cur_event_pos));
-  evData = t->cur_event_pos + EVENT_HEADER_SIZE;
-
-  evT    = ltt_trace_eventtype_get(t->trace,(unsigned)evId);
-    
-  if(likely(evT)) rootFld = evT->root_field;
-  else return ERANGE;
-  
-  if(likely(rootFld)){
-    //event has string/sequence or the last event is not the same event
-    if(likely((evT->latest_block!=t->which_block || evT->latest_event!=t->which_event)
-       && rootFld->field_fixed == 0)){
-      setFieldsOffset(t, evT, evData, t->trace);
-    }
-    t->cur_event_pos += EVENT_HEADER_SIZE + rootFld->field_size;
-  }else t->cur_event_pos += EVENT_HEADER_SIZE;
-    
-  //evT->latest_block = t->which_block;
-  //evT->latest_event = t->which_event;
-  
-  //the next event is in the next block
-  //if(unlikely(evId == TRACE_BLOCK_END)){
-    // Specify end of buffer reached.
-  //  t->cur_event_pos = t->buffer + t->block_size;
-  //}else{
-    //g_critical("COUNT : %lu", t->cur_cycle_count);
-    //t->which_event++;
-   // t->current_event_time = getEventTime(t);
-  //}
-
-  return 0;
-}
-
-
-
-
-/*****************************************************************************
- *Function name
- *    ltt_tracefile_pre_read_cycles : 
- *          read the current event, increment the cycle counter
- *Input params
- *    t                  : tracefile
- *Return value
- * False : end of bloc reached
- ****************************************************************************/
-
-gboolean ltt_tracefile_pre_read_cycles(LttTracefile *tf)
-{
-  int err;
-  //LttEvent event;
-
- // if(unlikely(t->cur_event_pos == t->buffer + t->block_size)){
-    //if(unlikely(t->which_block == t->block_number)){
-    //  return FALSE;
-    //}
-   // return FALSE; // end of bloc reached
-    //err = readBlock(t, t->which_block + 1);
-    //if(unlikely(err))g_error("Can not read tracefile");    
-  //}
-
-  //event.event_id = (int)(*(guint16 *)(t->cur_event_pos));
-  //if(unlikely(event.event_id == TRACE_TIME_HEARTBEAT))
-  //  t->cur_heart_beat_number++;
-
-  //t->prev_event_time  = t->current_event_time;
-  //  t->current_event_time = getEventTime(t);
-
-  //event.time_delta = *(guint32 *)(t->cur_event_pos + EVENT_ID_SIZE);
-  //event.event_time = t->current_event_time;
-  //event.event_cycle_count = t->cur_cycle_count;
-
-  //event.tracefile = t;
-  //event.data = t->cur_event_pos + EVENT_HEADER_SIZE;  
-  //event.which_block = t->which_block;
-  //event.which_event = t->which_event;
-
-  /* This is a workaround for fast position seek */
-  //event.last_event_pos = t->last_event_pos;
-  //event.prev_block_end_time = t->prev_block_end_time;
-  //event.prev_event_time = t->prev_event_time;
-  //event.pre_cycle_count = t->pre_cycle_count;
-  //event.count = t->count;
-  /* end of workaround */
-
-
-  /* Increment the cycle counter for the bloc */
-  LttTime       time;
-  LttCycleCount cycle_count;      // cycle count for the current event
-  LttCycleCount lEventTotalCycle; // Total cycles from start for event
-  LttCycleCount lEventNSec;       // Total nsecs from start for event
-  LttTime       lTimeOffset;      // Time offset in struct LttTime
-  guint16       evId;
-
-  evId = *(guint16 *)tf->cur_event_pos;
-  // Calculate total time in cycles from start of buffer for this event
-  cycle_count = (LttCycleCount)*(guint32 *)(tf->cur_event_pos + EVENT_ID_SIZE);
-  //g_debug("event cycle count %llu", cycle_count);
-  //
-  //gint64 delta_count = (gint64)(cycle_count - tf->pre_cycle_count);
-  //LttCycleCount res_delta_count;
-  gboolean comp_count = cycle_count < tf->pre_cycle_count;
-  tf->pre_cycle_count = cycle_count;
-  
-  if(unlikely(comp_count)) {
-    /* Wrapped */
-    tf->count++; //increment wrap count
-  }
-  
-  //if(unlikely(cycle_count < tf->pre_cycle_count)) tf->count++;
-  //if(unlikely(delta_count < 0)) {
-  //  tf->count++; //increment wrap count
-    // keep in mind that delta_count is negative here.
-  //  res_delta_count = delta_count + 0x100000000ULL ;
-  //} else
-  //  res_delta_count = (LttCycleCount)delta_count;
-  
-  //cycle_count += (LttCycleCount)tf->count << 32;  
-  
-  //FIXME (MD)
-  //  if(tf->cur_heart_beat_number > tf->count)
-  //    cycle_count += (tf->cur_heart_beat_number - tf->count) << 32;  
-
-  //tf->cur_cycle_count = tf->cur_cycle_count + res_delta_count;
-  tf->cur_cycle_count = cycle_count | ((LttCycleCount)tf->count << 32);
-  g_debug("cur cycle count %llu", tf->cur_cycle_count);
-
-
-
-
-  if(unlikely(evId == TRACE_BLOCK_START)){
-    g_debug("BLOCK START");
-  }else if(unlikely(evId == TRACE_BLOCK_END)){
-    g_debug("BLOCK END");
-
-    /* The goal of all this pre reading */
-    tf->a_block_end->cycle_count = tf->cur_cycle_count;
-    g_debug("end of block cycle count : %llu", tf->cur_cycle_count);
-
-    return FALSE;
-  }
-
-  //update the fields of the current event and go to the next event
-  err = skipEvent_pre_read_cycles(tf);
-  if(unlikely(err == ERANGE)) g_error("event id is out of range\n");
-
-
-  return TRUE;
-}
 
 /****************************************************************************
  *Function name
@@ -1311,8 +1228,10 @@ int readBlock(LttTracefile * tf, int whichBlock)
   if((guint)whichBlock == tf->which_block) return 0;
   
   if(likely(whichBlock - tf->which_block == 1 && tf->which_block != 0)){
-    tf->prev_block_end_time = tf->a_block_end->time;
-    tf->prev_event_time     = tf->a_block_end->time;
+    tf->prev_block_end_time = ltt_get_time(tf->trace->reverse_byte_order,
+                                           &tf->a_block_end->time);
+    tf->prev_event_time     = ltt_get_time(tf->trace->reverse_byte_order,
+                                           &tf->a_block_end->time);
   }else{
     tf->prev_block_end_time.tv_sec = 0;
     tf->prev_block_end_time.tv_nsec = 0;
@@ -1328,45 +1247,31 @@ int readBlock(LttTracefile * tf, int whichBlock)
 
   tf->a_block_start=(BlockStart *) (tf->buffer + EVENT_HEADER_SIZE);
   lostSize = *(guint32 *)(tf->buffer + tf->block_size - sizeof(guint32));
-  tf->a_block_end=(BlockEnd *)(tf->buffer + tf->block_size - 
-                               lostSize + EVENT_HEADER_SIZE); 
-  tf->last_event_pos = tf->buffer + tf->block_size - lostSize;
+  tf->a_block_end=(BlockEnd *)(tf->buffer + tf->block_size
+                                       - sizeof(guint32) - lostSize - sizeof(BlockEnd)); 
+  tf->last_event_pos = tf->buffer + tf->block_size - 
+                              sizeof(guint32) - lostSize
+                              - sizeof(BlockEnd) - EVENT_HEADER_SIZE;
 
   tf->which_block = whichBlock;
   tf->which_event = 1;
   tf->cur_event_pos = tf->buffer;//the beginning of the block, block start ev
   tf->cur_heart_beat_number = 0;
+  tf->last_heartbeat = NULL;
   
   /* read the whole block to precalculate total of cycles in it */
   tf->count = 0;
   tf->pre_cycle_count = 0;
-  tf->cur_cycle_count = 0;
-  g_debug("precalculating cycles begin for block %i", whichBlock);
-  while(likely(ltt_tracefile_pre_read_cycles(tf)));
-  /* Rough approximation of cycles per usec to calculate
-   * the real block start and end time.
-   */
-  getCyclePerNsec(tf);
-  /* we are at end position, make end time more precise */
-  tf->a_block_end->time = getEventTime(tf);  
-  
-  g_debug("precalculating cycles end for block %i", whichBlock);
+  tf->cur_cycle_count = ltt_get_uint32(tf->trace->reverse_byte_order, tf->cur_event_pos + EVENT_ID_SIZE);
 
-  /* put back pointer at the beginning */
-  tf->count = 0;
-  tf->pre_cycle_count = 0;
-  tf->cur_cycle_count = 0;
-  tf->which_event = 1;
-  tf->cur_event_pos = tf->buffer;//the beginning of the block, block start ev
-  tf->cur_heart_beat_number = 0;
-
-  /* Make start time more precise */
-  tf->a_block_start->time = getEventTime(tf);
-
-  /* recalculate the cycles per nsec, with now more precise start and end time
-   */
   getCyclePerNsec(tf);
 
+  tf->overflow_nsec = 
+               (-((double)
+               (ltt_get_uint64(tf->trace->reverse_byte_order,
+                               &tf->a_block_start->cycle_count)&0xFFFFFFFF))
+                                        * tf->nsec_per_cycle);
+
   tf->current_event_time = getEventTime(tf);  
 
   return 0;  
@@ -1389,6 +1294,13 @@ void updateTracefile(LttTracefile * tf)
 
   tf->prev_event_time.tv_sec = 0;
   tf->prev_event_time.tv_nsec = 0;
+  tf->count = 0;
+
+  tf->overflow_nsec = 
+    (-((double)ltt_get_uint64(tf->trace->reverse_byte_order,
+                              &tf->a_block_start->cycle_count))
+                                        * tf->nsec_per_cycle);
+
 }
 
 /*****************************************************************************
@@ -1408,7 +1320,7 @@ int skipEvent(LttTracefile * t)
   LttEventType * evT;
   LttField * rootFld;
 
-  evId   = (int)(*(guint16 *)(t->cur_event_pos));
+  evId   = ltt_get_uint16(t->trace->reverse_byte_order, t->cur_event_pos);
   evData = t->cur_event_pos + EVENT_HEADER_SIZE;
 
   evT    = ltt_trace_eventtype_get(t->trace,(unsigned)evId);
@@ -1432,6 +1344,8 @@ int skipEvent(LttTracefile * t)
   if(unlikely(evId == TRACE_BLOCK_END)){
     t->cur_event_pos = t->buffer + t->block_size;
   }else{
+    t->cur_cycle_count = ltt_get_uint32(t->trace->reverse_byte_order,
+                                t->cur_event_pos + EVENT_ID_SIZE);
     t->which_event++;
     t->current_event_time = getEventTime(t);
   }
@@ -1453,27 +1367,26 @@ void getCyclePerNsec(LttTracefile * t)
 {
   LttTime           lBufTotalTime; /* Total time for this buffer */
   double            lBufTotalNSec; /* Total time for this buffer in nsecs */
-  double            lBufTotalCycle;/* Total cycles for this buffer */
+  LttCycleCount     lBufTotalCycle;/* Total cycles for this buffer */
 
   /* Calculate the total time for this buffer */
-  lBufTotalTime = ltt_time_sub(t->a_block_end->time, t->a_block_start->time);
+  lBufTotalTime = ltt_time_sub(
+       ltt_get_time(t->trace->reverse_byte_order, &t->a_block_end->time),
+       ltt_get_time(t->trace->reverse_byte_order, &t->a_block_start->time));
 
   /* Calculate the total cycles for this bufffer */
-  lBufTotalCycle  = t->a_block_end->cycle_count;
-  lBufTotalCycle -= t->a_block_start->cycle_count;
+  lBufTotalCycle  = ltt_get_uint64(t->trace->reverse_byte_order,
+                          &t->a_block_end->cycle_count);
+  lBufTotalCycle -= ltt_get_uint64(t->trace->reverse_byte_order,
+                          &t->a_block_start->cycle_count);
 
-  /* Convert the total time to nsecs */
+  /* Convert the total time to double */
   lBufTotalNSec  = ltt_time_to_double(lBufTotalTime);
   
   t->nsec_per_cycle = (double)lBufTotalNSec / (double)lBufTotalCycle;
-  /* See : http://www.azillionmonkeys.com/qed/adiv.html */
-  // precalculate the reciprocal, so divisions will be really fast.
-  // 2^32-1 == 0xFFFFFFFFULL
-  //{
-  //  double int_res = lBufTotalCycle/lBufTotalNSec;
-  //  t->cycles_per_nsec_reciprocal = 
-  //            ((0xFFFF+int_res)/int_res);
-  //}
+
+  /* Pre-multiply one overflow (2^32 cycles) by nsec_per_cycle */
+  t->one_overflow_nsec = t->nsec_per_cycle * (double)0x100000000ULL;
 
 }
 
@@ -1491,86 +1404,58 @@ static inline LttTime getEventTime(LttTracefile * tf)
 {
   LttTime       time;
   LttCycleCount cycle_count;      // cycle count for the current event
-  LttCycleCount lEventTotalCycle; // Total cycles from start for event
-  LttCycleCount lEventNSec;       // Total nsecs from start for event
+  //LttCycleCount lEventTotalCycle; // Total cycles from start for event
+  gint64       lEventNSec;       // Total nsecs from start for event
   LttTime       lTimeOffset;      // Time offset in struct LttTime
   guint16       evId;
 
-  evId = *(guint16 *)tf->cur_event_pos;
-  //if(unlikely(evId == TRACE_BLOCK_START)){
-  //  tf->count = 0;
-  //  tf->pre_cycle_count = 0;
-  //  tf->cur_cycle_count = tf->a_block_start->cycle_count;
-  //  return tf->a_block_start->time;
-  //}//else if(unlikely(evId == TRACE_BLOCK_END)){
-    //tf->count = 0;
-    //tf->pre_cycle_count = 0;
-    //tf->cur_cycle_count = tf->a_block_end->cycle_count;
-    //return tf->a_block_end->time;
-  //}
+  evId = ltt_get_uint16(tf->trace->reverse_byte_order,
+                          tf->cur_event_pos);
   
-  // Calculate total time in cycles from start of buffer for this event
-  cycle_count = (LttCycleCount)*(guint32 *)(tf->cur_event_pos + EVENT_ID_SIZE);
-  //g_debug("event cycle count %llu", cycle_count);
-  //
-  //gint64 delta_count = (gint64)(cycle_count - tf->pre_cycle_count);
-  //LttCycleCount res_delta_count;
+  cycle_count = ltt_get_uint32(tf->trace->reverse_byte_order,
+                          tf->cur_event_pos + EVENT_ID_SIZE);
+
   gboolean comp_count = cycle_count < tf->pre_cycle_count;
+
   tf->pre_cycle_count = cycle_count;
   
   if(unlikely(comp_count)) {
-    /* Wrapped */
-    tf->count++; //increment wrap count
+    /* Overflow */
+    tf->overflow_nsec += tf->one_overflow_nsec;
+    tf->count++; //increment overflow count
   }
-  
-  //if(unlikely(cycle_count < tf->pre_cycle_count)) tf->count++;
-  //if(unlikely(delta_count < 0)) {
-  //  tf->count++; //increment wrap count
-    // keep in mind that delta_count is negative here.
-  //  res_delta_count = delta_count + 0x100000000ULL ;
-  //} else
-  //  res_delta_count = (LttCycleCount)delta_count;
-  
-  //cycle_count += (LttCycleCount)tf->count << 32;  
-  
-  //FIXME (MD)
-  //  if(tf->cur_heart_beat_number > tf->count)
-  //    cycle_count += (tf->cur_heart_beat_number - tf->count) << 32;  
-
-  //tf->cur_cycle_count = tf->cur_cycle_count + res_delta_count;
-  tf->cur_cycle_count = cycle_count | ((LttCycleCount)tf->count << 32);
-  g_debug("cur cycle count %llu", tf->cur_cycle_count);
-
-
-  lEventTotalCycle = tf->cur_cycle_count;
-
-
 
+  if(unlikely(evId == TRACE_BLOCK_START)) {
+     lEventNSec = 0;
+  } else if(unlikely(evId == TRACE_BLOCK_END)) {
+    lEventNSec = ((double)
+          (ltt_get_uint64(tf->trace->reverse_byte_order,
+                            &tf->a_block_end->cycle_count) 
+           - ltt_get_uint64(tf->trace->reverse_byte_order,
+                            &tf->a_block_start->cycle_count))
+                           * tf->nsec_per_cycle);
+  }
 #if 0
-  // Calculate total time in cycles from start of buffer for this event
-  cycle_count = (LttCycleCount)*(guint32 *)(tf->cur_event_pos + EVENT_ID_SIZE);
-  
-  if(unlikely(cycle_count < tf->pre_cycle_count)) tf->count++;
-  tf->pre_cycle_count = cycle_count;
-  cycle_count += (LttCycleCount)tf->count << 32;  
-  
-  //FIXME (MD)
-  //  if(tf->cur_heart_beat_number > tf->count)
-  //    cycle_count += (tf->cur_heart_beat_number - tf->count) << 32;  
-
-  tf->cur_cycle_count = cycle_count;
+  /* If you want to make heart beat a special case and use their own 64 bits
+   * TSC, activate this.
+   */
+  else if(unlikely(evId == TRACE_TIME_HEARTBEAT)) {
 
-  lEventTotalCycle  = cycle_count;
-  lEventTotalCycle -= tf->a_block_start->cycle_count;
+    tf->last_heartbeat = (TimeHeartbeat*)(tf->cur_event_pos+EVENT_HEADER_SIZE);
+    lEventNSec = ((double)(tf->last_heartbeat->cycle_count 
+                           - tf->a_block_start->cycle_count)
+                  * tf->nsec_per_cycle);
+  }
 #endif //0
-  // Convert it to nsecs
-  lEventNSec = (double)lEventTotalCycle * (double)tf->nsec_per_cycle;
-  //lEventNSec = (tf->cycles_per_nsec_reciprocal * lEventTotalCycle) >> 16;
-  
-  // Determine offset in struct LttTime 
-  lTimeOffset = ltt_time_from_double(lEventNSec);
+  else {
+    lEventNSec = (gint64)((double)cycle_count * tf->nsec_per_cycle)
+                                +tf->overflow_nsec;
+  }
 
-  time = ltt_time_add(tf->a_block_start->time, lTimeOffset);  
+  lTimeOffset = ltt_time_from_uint64(lEventNSec);
+  
+  time = ltt_time_add(ltt_get_time(tf->trace->reverse_byte_order,
+                                   &tf->a_block_start->time), lTimeOffset);  
   
   return time;
 }
@@ -1607,221 +1492,159 @@ void setFieldsOffset(LttTracefile *tf,LttEventType *evT,void *evD,LttTrace* t)
  *    int             : size of the field
  ****************************************************************************/
 
-int getFieldtypeSize(LttTracefile * t, LttEventType * evT, int offsetRoot,
-            int offsetParent, LttField * fld, void *evD, LttTrace *trace)
+static inline gint getFieldtypeSize(LttTracefile * t,
+       LttEventType * evT, gint offsetRoot,
+            gint offsetParent, LttField * fld, void *evD, LttTrace *trace)
 {
-  int size, size1, element_number, i, offset1, offset2;
+  gint size, size1, element_number, i, offset1, offset2;
   LttType * type = fld->field_type;
 
-  if(likely(t)){
-    if(unlikely(evT->latest_block==t->which_block && evT->latest_event==t->which_event)){
-      return fld->field_size;
-    } 
-  }
-
-  if(likely(fld->field_fixed == 1)){
-    if(fld == evT->root_field) return fld->field_size;
-  }     
-
-  switch(type->type_class) {
-    case LTT_ARRAY:
-      element_number = (int) type->element_number;
-      if(fld->field_fixed == -1){
-        size = getFieldtypeSize(t, evT, offsetRoot,
-                                0,fld->child[0], NULL, trace);
-        if(size == 0){ //has string or sequence
-          fld->field_fixed = 0;
-        }else{
-          fld->field_fixed = 1;
-          size *= element_number; 
-        }
-      }else if(fld->field_fixed == 0){// has string or sequence
-        size = 0;
-        for(i=0;i<element_number;i++){
-          size += getFieldtypeSize(t, evT, offsetRoot+size,size, 
-          fld->child[0], evD+size, trace);
-        }
-      }else size = fld->field_size;
-      break;
+  if(unlikely(t && evT->latest_block==t->which_block &&
+                   evT->latest_event==t->which_event)){
+    size = fld->field_size;
+    goto end_getFieldtypeSize;
+  } else {
+    /* This likely has been tested with gcov : half of them.. */
+    if(unlikely(fld->field_fixed == 1)){
+      /* tested : none */
+      if(unlikely(fld == evT->root_field)) {
+        size = fld->field_size;
+        goto end_getFieldtypeSize;
+      }
+    }
 
-    case LTT_SEQUENCE:
-      size1 = (int) ltt_type_size(trace, type);
-      if(fld->field_fixed == -1){
-        fld->sequ_number_size = size1;
-        fld->field_fixed = 0;
-        size = getFieldtypeSize(t, evT, offsetRoot,
-                                0,fld->child[0], NULL, trace);      
-        fld->element_size = size;
-      }else{//0: sequence
-        element_number = getIntNumber(size1,evD);
-        type->element_number = element_number;
-        if(fld->element_size > 0){
-          size = element_number * fld->element_size;
-        }else{//sequence has string or sequence
+    /* From gcov profiling : half string, half struct, can we gain something
+     * from that ? (Mathieu) */
+    switch(type->type_class) {
+      case LTT_ARRAY:
+        element_number = (int) type->element_number;
+        if(fld->field_fixed == -1){
+          size = getFieldtypeSize(t, evT, offsetRoot,
+                                  0,fld->child[0], NULL, trace);
+          if(size == 0){ //has string or sequence
+            fld->field_fixed = 0;
+          }else{
+            fld->field_fixed = 1;
+            size *= element_number; 
+          }
+        }else if(fld->field_fixed == 0){// has string or sequence
           size = 0;
           for(i=0;i<element_number;i++){
-            size += getFieldtypeSize(t, evT, offsetRoot+size+size1,size+size1
-                                     fld->child[0], evD+size+size1, trace);
+            size += getFieldtypeSize(t, evT, offsetRoot+size,size
+            fld->child[0], evD+size, trace);
           }
+        }else size = fld->field_size;
+        if(unlikely(!evD)){
+          fld->fixed_root    = (offsetRoot==-1)   ? 0 : 1;
+          fld->fixed_parent  = (offsetParent==-1) ? 0 : 1;
         }
-        size += size1;
-      }
-      break;
-      
-    case LTT_STRING:
-      size = 0;
-      if(fld->field_fixed == -1){
-        fld->field_fixed = 0;
-      }else{//0: string
-        size = strlen((char*)evD) + 1; //include end : '\0'
-      }
-      break;
-      
-    case LTT_STRUCT:
-      element_number = (int) type->element_number;
-      size = 0;
-      if(fld->field_fixed == -1){
-        offset1 = offsetRoot;
-        offset2 = 0;
-        for(i=0;i<element_number;i++){
-          size1=getFieldtypeSize(t, evT,offset1,offset2,
-                                 fld->child[i], NULL, trace);
-          if(size1 > 0 && size >= 0){
-            size += size1;
-            if(offset1 >= 0) offset1 += size1;
-              offset2 += size1;
-          }else{
-            size = -1;
-            offset1 = -1;
-            offset2 = -1;
-          }
-        }
-        if(size == -1){
-           fld->field_fixed = 0;
-           size = 0;
-        }else fld->field_fixed = 1;
-      }else if(fld->field_fixed == 0){
-        offset1 = offsetRoot;
-        offset2 = 0;
-        for(i=0;i<element_number;i++){
-          size=getFieldtypeSize(t,evT,offset1,offset2,
-                                fld->child[i],evD+offset2, trace);
-          offset1 += size;
-          offset2 += size;
-        }      
-        size = offset2;
-      }else size = fld->field_size;
-      break;
-
-    default:
-      if(fld->field_fixed == -1){
-        size = (int) ltt_type_size(trace, type);
-        fld->field_fixed = 1;
-      }else size = fld->field_size;
-      break;
-  }
 
+        break;
 
+      case LTT_SEQUENCE:
+        size1 = (int) ltt_type_size(trace, type);
+        if(fld->field_fixed == -1){
+          fld->sequ_number_size = size1;
+          fld->field_fixed = 0;
+          size = getFieldtypeSize(t, evT, offsetRoot,
+                                  0,fld->child[0], NULL, trace);      
+          fld->element_size = size;
+        }else{//0: sequence
+          element_number = getIntNumber(t->trace->reverse_byte_order,size1,evD);
+          type->element_number = element_number;
+          if(fld->element_size > 0){
+            size = element_number * fld->element_size;
+          }else{//sequence has string or sequence
+            size = 0;
+            for(i=0;i<element_number;i++){
+              size += getFieldtypeSize(t, evT, offsetRoot+size+size1,size+size1, 
+                                       fld->child[0], evD+size+size1, trace);
+            }
+          }
+          size += size1;
+        }
+        if(unlikely(!evD)){
+          fld->fixed_root    = (offsetRoot==-1)   ? 0 : 1;
+          fld->fixed_parent  = (offsetParent==-1) ? 0 : 1;
+        }
 
-#if 0
-  if(type->type_class != LTT_STRUCT && type->type_class != LTT_ARRAY &&
-     type->type_class != LTT_SEQUENCE && type->type_class != LTT_STRING){
-    if(fld->field_fixed == -1){
-      size = (int) ltt_type_size(trace, type);
-      fld->field_fixed = 1;
-    }else size = fld->field_size;
-
-  }else if(type->type_class == LTT_ARRAY){
-    element_number = (int) type->element_number;
-    if(fld->field_fixed == -1){
-      size = getFieldtypeSize(t, evT, offsetRoot,0,fld->child[0], NULL, trace);
-      if(size == 0){ //has string or sequence
-       fld->field_fixed = 0;
-      }else{
-       fld->field_fixed = 1;
-       size *= element_number; 
-      }
-    }else if(fld->field_fixed == 0){// has string or sequence
-      size = 0;
-      for(i=0;i<element_number;i++){
-       size += getFieldtypeSize(t, evT, offsetRoot+size,size, 
-                               fld->child[0], evD+size, trace);
-      }      
-    }else size = fld->field_size;
-
-  }else if(type->type_class == LTT_SEQUENCE){
-    size1 = (int) ltt_type_size(trace, type);
-    if(fld->field_fixed == -1){
-      fld->sequ_number_size = size1;
-      fld->field_fixed = 0;
-      size = getFieldtypeSize(t, evT, offsetRoot,0,fld->child[0], NULL, trace);      
-      fld->element_size = size;
-    }else{//0: sequence
-      element_number = getIntNumber(size1,evD);
-      type->element_number = element_number;
-      if(fld->element_size > 0){
-       size = element_number * fld->element_size;
-      }else{//sequence has string or sequence
-       size = 0;
-       for(i=0;i<element_number;i++){
-         size += getFieldtypeSize(t, evT, offsetRoot+size+size1,size+size1, 
-                                  fld->child[0], evD+size+size1, trace);
-       }       
-      }
-      size += size1;
-    }
+        break;
+        
+      case LTT_STRING:
+        size = 0;
+        if(fld->field_fixed == -1){
+          fld->field_fixed = 0;
+        }else{//0: string
+          /* Hope my implementation is faster than strlen (Mathieu) */
+          char *ptr=(char*)evD;
+          size = 1;
+          /* from gcov : many many strings are empty, make it the common case.*/
+          while(unlikely(*ptr != '\0')) { size++; ptr++; }
+          //size = ptr - (char*)evD + 1; //include end : '\0'
+        }
+        fld->fixed_root    = (offsetRoot==-1)   ? 0 : 1;
+        fld->fixed_parent  = (offsetParent==-1) ? 0 : 1;
 
-  }else if(type->type_class == LTT_STRING){
-    size = 0;
-    if(fld->field_fixed == -1){
-      fld->field_fixed = 0;
-    }else{//0: string
-      size = strlen((char*)evD) + 1; //include end : '\0'
+        break;
+        
+      case LTT_STRUCT:
+        element_number = (int) type->element_number;
+        size = 0;
+        /* tested with gcov */
+        if(unlikely(fld->field_fixed == -1)){
+          offset1 = offsetRoot;
+          offset2 = 0;
+          for(i=0;i<element_number;i++){
+            size1=getFieldtypeSize(t, evT,offset1,offset2,
+                                   fld->child[i], NULL, trace);
+            if(likely(size1 > 0 && size >= 0)){
+              size += size1;
+              if(likely(offset1 >= 0)) offset1 += size1;
+                offset2 += size1;
+            }else{
+              size = -1;
+              offset1 = -1;
+              offset2 = -1;
+            }
+          }
+          if(unlikely(size == -1)){
+             fld->field_fixed = 0;
+             size = 0;
+          }else fld->field_fixed = 1;
+        }else if(likely(fld->field_fixed == 0)){
+          offset1 = offsetRoot;
+          offset2 = 0;
+          for(i=0;unlikely(i<element_number);i++){
+            size=getFieldtypeSize(t,evT,offset1,offset2,
+                                  fld->child[i],evD+offset2, trace);
+            offset1 += size;
+            offset2 += size;
+          }      
+          size = offset2;
+        }else size = fld->field_size;
+        fld->fixed_root    = (offsetRoot==-1)   ? 0 : 1;
+        fld->fixed_parent  = (offsetParent==-1) ? 0 : 1;
+        break;
+
+      default:
+        if(unlikely(fld->field_fixed == -1)){
+          size = (int) ltt_type_size(trace, type);
+          fld->field_fixed = 1;
+        }else size = fld->field_size;
+        if(unlikely(!evD)){
+          fld->fixed_root    = (offsetRoot==-1)   ? 0 : 1;
+          fld->fixed_parent  = (offsetParent==-1) ? 0 : 1;
+        }
+        break;
     }
-
-  }else if(type->type_class == LTT_STRUCT){
-    element_number = (int) type->element_number;
-    size = 0;
-    if(fld->field_fixed == -1){      
-      offset1 = offsetRoot;
-      offset2 = 0;
-      for(i=0;i<element_number;i++){
-       size1=getFieldtypeSize(t, evT,offset1,offset2, fld->child[i], NULL, trace);
-       if(size1 > 0 && size >= 0){
-         size += size1;
-         if(offset1 >= 0) offset1 += size1;
-         offset2 += size1;
-       }else{
-         size = -1;
-         offset1 = -1;
-         offset2 = -1;
-       }
-      }
-      if(size == -1){
-       fld->field_fixed = 0;
-       size = 0;
-      }else fld->field_fixed = 1;
-    }else if(fld->field_fixed == 0){
-      offset1 = offsetRoot;
-      offset2 = 0;
-      for(i=0;i<element_number;i++){
-       size=getFieldtypeSize(t,evT,offset1,offset2,fld->child[i],evD+offset2, trace);
-       offset1 += size;
-       offset2 += size;
-      }      
-      size = offset2;
-    }else size = fld->field_size;
   }
-#endif //0
 
   fld->offset_root     = offsetRoot;
   fld->offset_parent   = offsetParent;
-  if(!evD){
-    fld->fixed_root    = (offsetRoot==-1)   ? 0 : 1;
-    fld->fixed_parent  = (offsetParent==-1) ? 0 : 1;
-  }
   fld->field_size      = size;
 
+end_getFieldtypeSize:
+
   return size;
 }
 
@@ -1836,30 +1659,23 @@ int getFieldtypeSize(LttTracefile * t, LttEventType * evT, int offsetRoot,
  *    gint64          : a 64 bits integer
  ****************************************************************************/
 
-gint64 getIntNumber(int size, void *evD)
+gint64 getIntNumber(gboolean reverse_byte_order, int size, void *evD)
 {
   gint64 i;
 
   switch(size) {
-    case 1: i = *(gint8 *)evD; break;
-    case 2: i = *(gint16 *)evD; break;
-    case 4: i = *(gint32 *)evD; break;
-    case 8: i = *(gint64 *)evD; break;
-    default: i = *(gint64 *)evD;
+    case 1: i = *((gint8*)evD); break;
+    case 2: i = ltt_get_int16(reverse_byte_order, evD); break;
+    case 4: i = ltt_get_int32(reverse_byte_order, evD); break;
+    case 8: i = ltt_get_int64(reverse_byte_order, evD); break;
+    default: i = ltt_get_int64(reverse_byte_order, evD);
              g_critical("getIntNumber : integer size %d unknown", size);
              break;
   }
 
-#if 0
-  if(size == 1)      i = *(gint8 *)evD;
-  else if(size == 2) i = *(gint16 *)evD;
-  else if(size == 4) i = *(gint32 *)evD;
-  else if(size == 8) i = *(gint64 *)evD;
-#endif //0
-
-  return (gint64)i;
+  return i;
 }
-
+#if 0
 /*****************************************************************************
  *Function name
  *    getDataEndianType : get the data type size and endian type of the local
@@ -1888,7 +1704,7 @@ void getDataEndianType(LttArchSize * size, LttArchEndian * endian)
     *size = LTT_ILP64;
   else *size = LTT_UNKNOWN;
 }
-
+#endif //0
 /* get the node name of the system */
 
 char * ltt_trace_system_description_node_name (LttSystemDescription * s)
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