Add possibility to parse multiple parameters

CMakeLists.txt

@@ -18,7 +18,7 @@ find_package(blc_core REQUIRED)
 #source files
 set(sources src/blc_loop.cpp src/blc_program.cpp src/blc_command.cpp)
 
-add_definitions(${BL_DEFINITIONS} -std=c++14)
+add_definitions(${BL_DEFINITIONS} -std=c++14 -Wall -W)
 include_directories(include ${BL_INCLUDE_DIRS})
 
 #shared lib

src/blc_command.cpp

@@ -113,7 +113,7 @@ void blc_command_remove(const char *command_name){
         if (strcmp(blc_commands[i].name, command_name) == 0) break;
     }
     if (i==-1) EXIT_ON_ERROR("You try to remove a command '%s' that does not exist", command_name);
-
+    
     REMOVE_ITEM_POSITION(&blc_commands, &blc_commands_nb, i);
 }
 
@@ -151,8 +151,8 @@ void blc_command_interpret_string(char const *input_string, size_t size){
                     parameter2_size = getline(&parameter2, &line_capability, stdin)-1;
                     parameter2[parameter2_size]=0;
                 }
-                if (command->callback == NULL) EXIT_ON_ERROR("Command callback is NULL for command '%s'", command->name);
-                command->callback(parameter2, command->user_data);
+                if (command->callback == nullptr) EXIT_ON_ERROR("Command callback is NULL for command '%s'", command->name);
+                else command->callback(parameter2, command->user_data);
                 FREE(parameter2);
                 line_capability=0;
                 break; //Command has been found
@@ -164,9 +164,9 @@ void blc_command_interpret_string(char const *input_string, size_t size){
                     break;
                 }
                 else continue; //Maybe it is a command with a longer name, we continue to check
-            /*    if ((command->prompt != NULL) && (command->prompt[0]!='|')) continue; // If we do not wait for parameter, the command must be exact.
-                else
-                return;*/
+                /*    if ((command->prompt != NULL) && (command->prompt[0]!='|')) continue; // If we do not wait for parameter, the command must be exact.
+                 else
+                 return;*/
             }
         }
     }
@@ -174,11 +174,11 @@ void blc_command_interpret_string(char const *input_string, size_t size){
 }
 
 void blc_command_interpret_block(){
-    char *line=NULL;
+    char *line=nullptr;
     size_t line_capability=0;
     ssize_t line_size;
     
-    //We do not consider error if it was an interruption. @TODO check wether the content of lin is correct.
+    //We do not consider error if it was an interruption. @TODO check wether the content of line is correct.
     do{
         line_size = getline(&line, &line_capability, stdin);
     }while ((line_size==-1) && (errno==EINTR));

src/blc_loop.cpp

@@ -106,13 +106,16 @@ static void blc_command_send_to_all(char const *argument){
 }
 
 void blc_command_ask_quit(){
-    if (blc_status==BLC_PAUSE) BLC_PTHREAD_CHECK(pthread_mutex_unlock(&mutex_lock_keyboard), NULL);
+    //In pause we unlock the keyboard
+    if (blc_status==BLC_PAUSE) BLC_PTHREAD_CHECK(pthread_mutex_unlock(&mutex_lock_keyboard), nullptr);
+    
+    //In step by step we switch to quitting mode
     if (blc_status!=BLC_STEPS) blc_status=BLC_QUIT;
     
     if (blocking_semaphore){
         if (sem_trywait(blocking_semaphore)==0){
             sem_post(blocking_semaphore); // we succeed, it was not a problem, I free it.
-            blocking_semaphore=NULL;
+            blocking_semaphore=nullptr;
         }
         else if (errno==EAGAIN) sem_post(blocking_semaphore);
         else EXIT_ON_SYSTEM_ERROR("unlocking semaphore for quitting");
@@ -122,7 +125,7 @@ void blc_command_ask_quit(){
 static void step_forward_cb(const char* steps_nb_str, void*){
     int  steps_nb, pos;
     if (steps_nb_str){
-        if (sscanf(steps_nb_str, "%d%n", &steps_nb, &pos)!=1 || pos !=strlen(steps_nb_str) || steps_nb<1){
+        if (sscanf(steps_nb_str, "%d%n", &steps_nb, &pos)!=1 || pos != (int)strlen(steps_nb_str) || steps_nb<1){
             color_eprintf(BLC_YELLOW, "'%s' is not a valid step number\n", steps_nb_str);
             return;
         }
@@ -168,7 +171,7 @@ static void *loop_check_stuck(void*){
 
         sleep(checking_time);
         if(blc_status==BLC_RUN){ //in BLC_PAUSE it is normal to block
-        	if (iteration==blc_loop_iteration) {
+        	if (iteration==(int)blc_loop_iteration) {
             	color_eprintf(BLC_YELLOW, "'%s' seems blocked on iteration '%d'. The loop has been stopped for more than %ds\n", blc_program_id, iteration, checking_time);
                 if (blc_profile_file) fflush(blc_profile_file); //It may help for debuggage
             	was_stucked=1;
@@ -192,35 +195,32 @@ static void *command_thread_interpret_loop(void *){
     return NULL;
 }
 
+///This create one or two threads.
 void blc_command_loop_init(long loop_period){
     if (blc_command_loop_period==-3) EXIT_ON_ERROR("You already are in a blc_command_loop");
     blc_loop_iteration=0;
     intermediate_iteration=0;
     blc_command_loop_period=loop_period;
     
-    if (blc_command_loop_period==-2){
-        blc_command_loop_period=-1;
-    }
-    else BLC_PTHREAD_CHECK(pthread_mutex_lock(&mutex_lock_keyboard), NULL);
+    /*We do not block the keyboard in -2 mode */
+    if (blc_command_loop_period!=-2)  BLC_PTHREAD_CHECK(pthread_mutex_lock(&mutex_lock_keyboard), nullptr);
+    else blc_command_loop_period=-1;
     
-    if (blc_input_terminal){
-         blc_command_display_help(); //We display help only for keyboard
-    }
+    if (blc_input_terminal) blc_command_display_help(); //We display help only for keyboard
     
-    if (blc_command_loop_period!=-1) blc_command_add("", (type_blc_command_cb)pause_cb, NULL, "set on/off pause", NULL);
-
-    blc_command_add("h", (type_blc_command_cb)blc_command_display_help, NULL, "display this help", NULL);
-    blc_command_add("q", (type_blc_command_cb)blc_command_ask_quit, NULL, "quit the application", NULL);
+    if (blc_command_loop_period != -1) blc_command_add("", (type_blc_command_cb)pause_cb, NULL, "set on/off pause", nullptr);
+    blc_command_add("h", (type_blc_command_cb)blc_command_display_help, nullptr, "display this help", nullptr);
+    blc_command_add("q", (type_blc_command_cb)blc_command_ask_quit, nullptr, "quit the application", nullptr);
 
     if (blc_command_loop_period!=-1) { //we lock on keyboard. But if the program lock we still read keyboard
-        SYSTEM_ERROR_CHECK(pthread_create(&loop_check_stuck_thread, NULL, loop_check_stuck, NULL), -1, NULL);
-        blc_command_add("s", (type_blc_command_cb)display_stats, NULL, "display time stats", NULL); //We did not do stat on keyboard
+        SYSTEM_ERROR_CHECK(pthread_create(&loop_check_stuck_thread, nullptr, loop_check_stuck, nullptr), -1, nullptr);
+        blc_command_add("s", (type_blc_command_cb)display_stats, nullptr, "display time stats", nullptr); //We did not do stat on keyboard
         fprintf(stderr, "=== %s: running ===\n", blc_program_id);
     }
-    blc_command_add("|", (type_blc_command_cb)blc_command_send_to_stdout, "command", "sends the command to stdout", NULL);
-    blc_command_add("&", (type_blc_command_cb)blc_command_send_to_all, "command", "inteprets command and sends it to stdout", NULL);
+    blc_command_add("|", (type_blc_command_cb)blc_command_send_to_stdout, "command", "sends the command to stdout", nullptr);
+    blc_command_add("&", (type_blc_command_cb)blc_command_send_to_all, "command", "inteprets command and sends it to stdout", nullptr);
 
-    BLC_PTHREAD_CHECK(pthread_create(&loop_thread, NULL, command_thread_interpret_loop, NULL), NULL);
+    BLC_PTHREAD_CHECK(pthread_create(&loop_thread, nullptr, command_thread_interpret_loop, nullptr), nullptr);
 }
 
 int blc_command_loop_start(){
@@ -235,7 +235,7 @@ int blc_command_loop_start(){
         pause_cb();
     }
     
-    //If we quit, we quit now before blockinhs semaphores.
+    //If we quit, we quit now before blocking semaphores.
     if (blc_status==BLC_QUIT) return 0;
     
     //We eventually wait for keyboard return key