openocd: fix simple cases of NULL comparison

There are more than 1000 NULL comparisons to be aligned to the
coding style.
For recurrent NULL comparison it's preferable using trivial
scripts in order to minimize the review effort.

Patch generated automatically with the command:
	sed -i PATTERN $(find src/ -type f)
where PATTERN is in the list:
	's/(\([a-z][a-z0-9_]*\) == NULL)/(!\1)/g'
	's/(\([a-z][a-z0-9_]*->[a-z][a-z0-9_]*\) == NULL)/(!\1)/g'
	's/(\([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\) == NULL)/(!\1)/g'

	's/(\([a-z][a-z0-9_]*\) != NULL)/(\1)/g'
	's/(\([a-z][a-z0-9_]*->[a-z][a-z0-9_]*\) != NULL)/(\1)/g'
	's/(\([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\) != NULL)/(\1)/g'

	's/(NULL == \([a-z][a-z0-9_]*\))/(!\1)/g'
	's/(NULL == \([a-z][a-z0-9_]*->[a-z][a-z0-9_]*\))/(!\1)/g'
	's/(NULL == \([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\))/(!\1)/g'

	's/(NULL != \([a-z][a-z0-9_]*\))/(\1)/g'
	's/(NULL != \([a-z][a-z0-9_]*->[a-z][a-z0-9_]*\))/(\1)/g'
	's/(NULL != \([a-z][a-z0-9_]*\.[a-z][a-z0-9_]*\))/(\1)/g'

Change-Id: Ida103e325d6d0600fb69c0b7a1557ee969db4417
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/6350
Tested-by: jenkins

1 files changed, 36 insertions, 36 deletions

diff --git a/src/rtos/linux.c b/src/rtos/linux.c
index 0a15efa..b9749b5 100644
--- a/src/rtos/linux.c
+++ b/src/rtos/linux.c
@@ -181,7 +181,7 @@ static int linux_os_thread_reg_list(struct rtos *rtos,
 			found = 1;
 		else
 			next = next->next;
-	} while ((found == 0) && (next != tmp) && (next != NULL));
+	} while ((found == 0) && (next != tmp) && (next));
 
 	if (found == 0) {
 		LOG_ERROR("could not find thread: %" PRIx64, thread_id);
@@ -408,7 +408,7 @@ static int get_current(struct target *target, int create)
 	struct current_thread *ctt = linux_os->current_threads;
 
 	/*  invalid current threads content */
-	while (ctt != NULL) {
+	while (ctt) {
 		ctt->threadid = -1;
 		ctt->TS = 0xdeadbeef;
 		ctt = ctt->next;
@@ -445,10 +445,10 @@ static int get_current(struct target *target, int create)
 					linux_os->current_threads;
 				cpu = head->target->coreid;
 
-				while ((ct != NULL) && (ct->core_id != (int32_t) cpu))
+				while ((ct) && (ct->core_id != (int32_t) cpu))
 					ct = ct->next;
 
-				if ((ct != NULL) && (ct->TS == 0xdeadbeef))
+				if ((ct) && (ct->TS == 0xdeadbeef))
 					ct->TS = TS;
 				else
 					LOG_ERROR
@@ -603,13 +603,13 @@ static struct current_thread *add_current_thread(struct current_thread *currents
 {
 	ct->next = NULL;
 
-	if (currents == NULL) {
+	if (!currents) {
 		currents = ct;
 		return currents;
 	} else {
 		struct current_thread *temp = currents;
 
-		while (temp->next != NULL)
+		while (temp->next)
 			temp = temp->next;
 
 		temp->next = ct;
@@ -640,13 +640,13 @@ static struct threads *liste_add_task(struct threads *task_list, struct threads
 	t->next = NULL;
 
 	if (*last == NULL)
-		if (task_list == NULL) {
+		if (!task_list) {
 			task_list = t;
 			return task_list;
 		} else {
 			struct threads *temp = task_list;
 
-			while (temp->next != NULL)
+			while (temp->next)
 				temp = temp->next;
 
 			temp->next = t;
@@ -668,15 +668,15 @@ static int current_base_addr(struct linux_os *linux_os, uint32_t base_addr)
 	struct current_thread *ct = linux_os->current_threads;
 #ifdef PID_CHECK
 
-	while ((ct != NULL) && (ct->pid != pid))
+	while ((ct) && (ct->pid != pid))
 #else
-	while ((ct != NULL) && (ct->TS != base_addr))
+	while ((ct) && (ct->TS != base_addr))
 #endif
 		ct = ct->next;
 #ifdef PID_CHECK
-	if ((ct != NULL) && (ct->pid == pid))
+	if ((ct) && (ct->pid == pid))
 #else
-	if ((ct != NULL) && (ct->TS == base_addr))
+	if ((ct) && (ct->TS == base_addr))
 #endif
 		return 1;
 
@@ -777,7 +777,7 @@ static int clean_threadlist(struct target *target)
 		target->rtos->rtos_specific_params;
 	struct threads *old, *temp = linux_os->thread_list;
 
-	while (temp != NULL) {
+	while (temp) {
 		old = temp;
 
 		free(temp->context);
@@ -815,10 +815,10 @@ static int insert_into_threadlist(struct target *target, struct threads *t)
 	t->status = 1;
 	t->next = NULL;
 
-	if (temp == NULL)
+	if (!temp)
 		linux_os->thread_list = t;
 	else {
-		while (temp->next != NULL)
+		while (temp->next)
 			temp = temp->next;
 
 		t->next = NULL;
@@ -836,7 +836,7 @@ static void linux_identify_current_threads(struct target *target)
 	struct current_thread *ct = linux_os->current_threads;
 	struct threads *t = NULL;
 
-	while ((ct != NULL)) {
+	while ((ct)) {
 		if (ct->threadid == -1) {
 
 			/*  un-identified thread */
@@ -856,7 +856,7 @@ error_handling:
 
 			/* search in the list of threads if pid
 			   already present */
-			while ((thread_list != NULL) && (found == 0)) {
+			while ((thread_list) && (found == 0)) {
 #ifdef PID_CHECK
 				if (thread_list->pid == t->pid) {
 #else
@@ -926,7 +926,7 @@ static int linux_task_update(struct target *target, int context)
 	linux_os->thread_count = 0;
 
 	/*thread_list = thread_list->next; skip init_task*/
-	while (thread_list != NULL) {
+	while (thread_list) {
 		thread_list->status = 0;	/*setting all tasks to dead state*/
 
 		free(thread_list->context);
@@ -967,7 +967,7 @@ static int linux_task_update(struct target *target, int context)
 
 		thread_list = linux_os->thread_list;
 
-		while (thread_list != NULL) {
+		while (thread_list) {
 #ifdef PID_CHECK
 			if (t->pid == thread_list->pid) {
 #else
@@ -1058,7 +1058,7 @@ static int linux_gdb_thread_packet(struct target *target,
 	tmp_str += sprintf(tmp_str, "m");
 	struct threads *temp = linux_os->thread_list;
 
-	while (temp != NULL) {
+	while (temp) {
 		tmp_str += sprintf(tmp_str, "%016" PRIx64, temp->threadid);
 		temp = temp->next;
 		if (temp)
@@ -1079,7 +1079,7 @@ static int linux_gdb_thread_update(struct target *target,
 		target->rtos->rtos_specific_params;
 	struct threads *temp = linux_os->thread_list;
 
-	while (temp != NULL) {
+	while (temp) {
 		if (temp->threadid == linux_os->preupdtate_threadid_count + 1) {
 			/*LOG_INFO("FOUND");*/
 			found = 1;
@@ -1098,7 +1098,7 @@ static int linux_gdb_thread_update(struct target *target,
 
 		temp = temp->next;
 
-		while (temp != NULL) {
+		while (temp) {
 			/*LOG_INFO("INTO GDB THREAD UPDATE WHILE");*/
 			tmp_strr += sprintf(tmp_strr, ",");
 			tmp_strr +=
@@ -1128,7 +1128,7 @@ static int linux_thread_extra_info(struct target *target,
 	/*LOG_INFO("lookup extra info for thread %" SCNx64, threadid);*/
 	struct threads *temp = linux_os->thread_list;
 
-	while (temp != NULL) {
+	while (temp) {
 		if (temp->threadid == threadid) {
 			char *pid = " PID: ";
 			char *pid_current = "*PID: ";
@@ -1176,7 +1176,7 @@ static int linux_gdb_t_packet(struct connection *connection,
 		struct threads *temp = linux_os->thread_list;
 		struct threads *prev = NULL;
 
-		while (temp != NULL) {
+		while (temp) {
 			if (temp->threadid == threadid) {
 				if (temp->status != 0) {
 					gdb_put_packet(connection, "OK", 2);
@@ -1205,7 +1205,7 @@ static int linux_gdb_t_packet(struct connection *connection,
 		retval = linux_task_update(target, 1);
 		struct threads *temp = linux_os->thread_list;
 
-		while (temp != NULL) {
+		while (temp) {
 			if (temp->threadid == threadid) {
 				if (temp->status == 1) {
 					gdb_put_packet(connection, "OK", 2);
@@ -1231,20 +1231,20 @@ static int linux_gdb_h_packet(struct connection *connection,
 	struct current_thread *ct = linux_os->current_threads;
 
 	/* select to display the current thread of the selected target */
-	while ((ct != NULL) && (ct->core_id != target->coreid))
+	while ((ct) && (ct->core_id != target->coreid))
 		ct = ct->next;
 
 	int64_t current_gdb_thread_rq;
 
 	if (linux_os->threads_lookup == 1) {
-		if ((ct != NULL) && (ct->threadid == -1)) {
+		if ((ct) && (ct->threadid == -1)) {
 			ct = linux_os->current_threads;
 
-			while ((ct != NULL) && (ct->threadid == -1))
+			while ((ct) && (ct->threadid == -1))
 				ct = ct->next;
 		}
 
-		if (ct == NULL) {
+		if (!ct) {
 			/*  no current thread can be identified
 			 *  any way with smp  */
 			LOG_INFO("no current thread identified");
@@ -1253,7 +1253,7 @@ static int linux_gdb_h_packet(struct connection *connection,
 			struct threads t;
 			ct = linux_os->current_threads;
 
-			while ((ct != NULL) && (ct->threadid == -1)) {
+			while ((ct) && (ct->threadid == -1)) {
 				t.base_addr = ct->TS;
 				get_name(target, &t);
 				LOG_INFO("name of unidentified thread %s",
@@ -1321,7 +1321,7 @@ static int linux_thread_packet(struct connection *connection, char const *packet
 
 				break;
 			} else if (strncmp(packet, "qfThreadInfo", 12) == 0) {
-				if (linux_os->thread_list == NULL) {
+				if (!linux_os->thread_list) {
 					retval = linux_gdb_thread_packet(target,
 							connection,
 							packet,
@@ -1356,17 +1356,17 @@ static int linux_thread_packet(struct connection *connection, char const *packet
 			if (linux_os->threads_lookup == 1) {
 				ct = linux_os->current_threads;
 
-				while ((ct != NULL) && (ct->core_id) != target->coreid)
+				while ((ct) && (ct->core_id) != target->coreid)
 					ct = ct->next;
 
-				if ((ct != NULL) && (ct->threadid == -1)) {
+				if ((ct) && (ct->threadid == -1)) {
 					ct = linux_os->current_threads;
 
-					while ((ct != NULL) && (ct->threadid == -1))
+					while ((ct) && (ct->threadid == -1))
 						ct = ct->next;
 				}
 
-				if ((ct != NULL) && (ct->threadid !=
+				if ((ct) && (ct->threadid !=
 						 target->rtos->current_threadid)
 				&& (target->rtos->current_threadid != -1))
 					LOG_WARNING("WARNING! current GDB thread do not match "
@@ -1478,7 +1478,7 @@ static char *linux_ps_command(struct target *target)
 		tmp += sprintf(tmp, "PID\t\tCPU\t\tASID\t\tNAME\n");
 		tmp += sprintf(tmp, "---\t\t---\t\t----\t\t----\n");
 
-		while (temp != NULL) {
+		while (temp) {
 			if (temp->status) {
 				if (temp->context)
 					tmp +=