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

4 files changed, 46 insertions, 46 deletions

diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c
index 2853f05..bc3a675 100644
--- a/src/server/gdb_server.c
+++ b/src/server/gdb_server.c
@@ -177,7 +177,7 @@ static int check_pending(struct connection *connection,
 	fd_set read_fds;
 	struct gdb_connection *gdb_con = connection->priv;
 	int t;
-	if (got_data == NULL)
+	if (!got_data)
 		got_data = &t;
 	*got_data = 0;
 
@@ -369,7 +369,7 @@ static void gdb_log_incoming_packet(char *packet)
 		/* Does packet at least have a prefix that is printable?
 		 * Look within the first 50 chars of the packet. */
 		const char *colon = memchr(packet, ':', MIN(50, packet_len));
-		const bool packet_has_prefix = (colon != NULL);
+		const bool packet_has_prefix = (colon);
 		const bool packet_prefix_printable = (packet_has_prefix && nonprint > colon);
 
 		if (packet_prefix_printable) {
@@ -737,7 +737,7 @@ static int gdb_output_con(struct connection *connection, const char *line)
 	bin_size = strlen(line);
 
 	hex_buffer = malloc(bin_size * 2 + 2);
-	if (hex_buffer == NULL)
+	if (!hex_buffer)
 		return ERROR_GDB_BUFFER_TOO_SMALL;
 
 	hex_buffer[0] = 'O';
@@ -771,7 +771,7 @@ static void gdb_signal_reply(struct target *target, struct connection *connectio
 		sig_reply_len = snprintf(sig_reply, sizeof(sig_reply), "W00");
 	} else {
 		struct target *ct;
-		if (target->rtos != NULL) {
+		if (target->rtos) {
 			target->rtos->current_threadid = target->rtos->current_thread;
 			target->rtos->gdb_target_for_threadid(connection, target->rtos->current_threadid, &ct);
 		} else {
@@ -810,7 +810,7 @@ static void gdb_signal_reply(struct target *target, struct connection *connectio
 		}
 
 		current_thread[0] = '\0';
-		if (target->rtos != NULL)
+		if (target->rtos)
 			snprintf(current_thread, sizeof(current_thread), "thread:%" PRIx64 ";",
 					target->rtos->current_thread);
 
@@ -1212,7 +1212,7 @@ static int gdb_get_registers_packet(struct connection *connection,
 	LOG_DEBUG("-");
 #endif
 
-	if ((target->rtos != NULL) && (ERROR_OK == rtos_get_gdb_reg_list(connection)))
+	if ((target->rtos) && (ERROR_OK == rtos_get_gdb_reg_list(connection)))
 		return ERROR_OK;
 
 	retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size,
@@ -1229,7 +1229,7 @@ static int gdb_get_registers_packet(struct connection *connection,
 	assert(reg_packet_size > 0);
 
 	reg_packet = malloc(reg_packet_size + 1); /* plus one for string termination null */
-	if (reg_packet == NULL)
+	if (!reg_packet)
 		return ERROR_FAIL;
 
 	reg_packet_p = reg_packet;
@@ -1342,7 +1342,7 @@ static int gdb_get_register_packet(struct connection *connection,
 	LOG_DEBUG("-");
 #endif
 
-	if ((target->rtos != NULL) && (ERROR_OK == rtos_get_gdb_reg(connection, reg_num)))
+	if ((target->rtos) && (ERROR_OK == rtos_get_gdb_reg(connection, reg_num)))
 		return ERROR_OK;
 
 	retval = target_get_gdb_reg_list_noread(target, &reg_list, &reg_list_size,
@@ -1398,7 +1398,7 @@ static int gdb_set_register_packet(struct connection *connection,
 	uint8_t *bin_buf = malloc(chars / 2);
 	gdb_target_to_reg(target, separator + 1, chars, bin_buf);
 
-	if ((target->rtos != NULL) &&
+	if ((target->rtos) &&
 			(ERROR_OK == rtos_set_reg(connection, reg_num, bin_buf))) {
 		free(bin_buf);
 		gdb_put_packet(connection, "OK", 2);
@@ -1824,7 +1824,7 @@ static int decode_xfer_read(char const *buf, char **annex, int *ofs, unsigned in
 {
 	/* Locate the annex. */
 	const char *annex_end = strchr(buf, ':');
-	if (annex_end == NULL)
+	if (!annex_end)
 		return ERROR_FAIL;
 
 	/* After the read marker and annex, qXfer looks like a
@@ -1838,7 +1838,7 @@ static int decode_xfer_read(char const *buf, char **annex, int *ofs, unsigned in
 	*len = strtoul(separator + 1, NULL, 16);
 
 	/* Extract the annex if needed */
-	if (annex != NULL) {
+	if (annex) {
 		*annex = strndup(buf, annex_end - buf);
 		if (*annex == NULL)
 			return ERROR_FAIL;
@@ -2102,7 +2102,7 @@ static int gdb_generate_reg_type_description(struct target *target,
 	} else if (type->type_class == REG_TYPE_CLASS_UNION) {
 		struct reg_data_type_union_field *field;
 		field = type->reg_type_union->fields;
-		while (field != NULL) {
+		while (field) {
 			struct reg_data_type *data_type = field->type;
 			if (data_type->type == REG_TYPE_ARCH_DEFINED) {
 				if (lookup_add_arch_defined_types(arch_defined_types_list, data_type->id,
@@ -2122,7 +2122,7 @@ static int gdb_generate_reg_type_description(struct target *target,
 				type->id);
 
 		field = type->reg_type_union->fields;
-		while (field != NULL) {
+		while (field) {
 			xml_printf(&retval, tdesc, pos, size,
 					"<field name=\"%s\" type=\"%s\"/>\n",
 					field->name, field->type->id);
@@ -2144,7 +2144,7 @@ static int gdb_generate_reg_type_description(struct target *target,
 			xml_printf(&retval, tdesc, pos, size,
 					"<struct id=\"%s\" size=\"%" PRIu32 "\">\n",
 					type->id, type->reg_type_struct->size);
-			while (field != NULL) {
+			while (field) {
 				xml_printf(&retval, tdesc, pos, size,
 						"<field name=\"%s\" start=\"%" PRIu32 "\" end=\"%" PRIu32 "\" type=\"%s\" />\n",
 						field->name, field->bitfield->start, field->bitfield->end,
@@ -2153,7 +2153,7 @@ static int gdb_generate_reg_type_description(struct target *target,
 				field = field->next;
 			}
 		} else {
-			while (field != NULL) {
+			while (field) {
 				struct reg_data_type *data_type = field->type;
 				if (data_type->type == REG_TYPE_ARCH_DEFINED) {
 					if (lookup_add_arch_defined_types(arch_defined_types_list, data_type->id,
@@ -2170,7 +2170,7 @@ static int gdb_generate_reg_type_description(struct target *target,
 			xml_printf(&retval, tdesc, pos, size,
 					"<struct id=\"%s\">\n",
 					type->id);
-			while (field != NULL) {
+			while (field) {
 				xml_printf(&retval, tdesc, pos, size,
 						"<field name=\"%s\" type=\"%s\"/>\n",
 						field->name, field->type->id);
@@ -2192,7 +2192,7 @@ static int gdb_generate_reg_type_description(struct target *target,
 
 		struct reg_data_type_flags_field *field;
 		field = type->reg_type_flags->fields;
-		while (field != NULL) {
+		while (field) {
 			xml_printf(&retval, tdesc, pos, size,
 					"<field name=\"%s\" start=\"%" PRIu32 "\" end=\"%" PRIu32 "\" type=\"%s\" />\n",
 					field->name, field->bitfield->start, field->bitfield->end,
@@ -2297,12 +2297,12 @@ static int gdb_generate_target_description(struct target *target, char **tdesc_o
 
 	/* generate architecture element if supported by target */
 	architecture = target_get_gdb_arch(target);
-	if (architecture != NULL)
+	if (architecture)
 		xml_printf(&retval, &tdesc, &pos, &size,
 				"<architecture>%s</architecture>\n", architecture);
 
 	/* generate target description according to register list */
-	if (features != NULL) {
+	if (features) {
 		while (features[current_feature]) {
 			char const **arch_defined_types = NULL;
 			int num_arch_defined_types = 0;
@@ -2394,7 +2394,7 @@ error:
 static int gdb_get_target_description_chunk(struct target *target, struct target_desc_format *target_desc,
 		char **chunk, int32_t offset, uint32_t length)
 {
-	if (target_desc == NULL) {
+	if (!target_desc) {
 		LOG_ERROR("Unable to Generate Target Description");
 		return ERROR_FAIL;
 	}
@@ -2402,7 +2402,7 @@ static int gdb_get_target_description_chunk(struct target *target, struct target
 	char *tdesc = target_desc->tdesc;
 	uint32_t tdesc_length = target_desc->tdesc_length;
 
-	if (tdesc == NULL) {
+	if (!tdesc) {
 		int retval = gdb_generate_target_description(target, &tdesc);
 		if (retval != ERROR_OK) {
 			LOG_ERROR("Unable to Generate Target Description");
@@ -2502,7 +2502,7 @@ static int gdb_generate_thread_list(struct target *target, char **thread_list_ou
 		   "<?xml version=\"1.0\"?>\n"
 		   "<threads>\n");
 
-	if (rtos != NULL) {
+	if (rtos) {
 		for (int i = 0; i < rtos->thread_count; i++) {
 			struct thread_detail *thread_detail = &rtos->thread_details[i];
 
@@ -2512,12 +2512,12 @@ static int gdb_generate_thread_list(struct target *target, char **thread_list_ou
 			xml_printf(&retval, &thread_list, &pos, &size,
 				   "<thread id=\"%" PRIx64 "\">", thread_detail->threadid);
 
-			if (thread_detail->thread_name_str != NULL)
+			if (thread_detail->thread_name_str)
 				xml_printf(&retval, &thread_list, &pos, &size,
 					   "Name: %s", thread_detail->thread_name_str);
 
-			if (thread_detail->extra_info_str != NULL) {
-				if (thread_detail->thread_name_str != NULL)
+			if (thread_detail->extra_info_str) {
+				if (thread_detail->thread_name_str)
 					xml_printf(&retval, &thread_list, &pos, &size,
 						   ", ");
 				xml_printf(&retval, &thread_list, &pos, &size,
@@ -2825,12 +2825,12 @@ static bool gdb_handle_vcont_packet(struct connection *connection, const char *p
 			packet_size -= 2;
 
 			thread_id = strtoll(parse, &endp, 16);
-			if (endp != NULL) {
+			if (endp) {
 				packet_size -= endp - parse;
 				parse = endp;
 			}
 
-			if (target->rtos != NULL) {
+			if (target->rtos) {
 				/* FIXME: why is this necessary? rtos state should be up-to-date here already! */
 				rtos_update_threads(target);
 
@@ -2948,7 +2948,7 @@ static char *next_hex_encoded_field(const char **str, char sep)
 		return NULL;
 
 	const char *end = strchr(hex, sep);
-	if (end == NULL)
+	if (!end)
 		hexlen = strlen(hex);
 	else
 		hexlen = end - hex;
@@ -2961,7 +2961,7 @@ static char *next_hex_encoded_field(const char **str, char sep)
 
 	size_t count = hexlen / 2;
 	char *decoded = malloc(count + 1);
-	if (decoded == NULL)
+	if (!decoded)
 		return NULL;
 
 	size_t converted = unhexify((void *)decoded, hex, count);
@@ -3014,8 +3014,8 @@ static bool gdb_handle_vrun_packet(struct connection *connection, const char *pa
 		cmdline = new_cmdline;
 	}
 
-	if (cmdline != NULL) {
-		if (target->semihosting != NULL) {
+	if (cmdline) {
+		if (target->semihosting) {
 			LOG_INFO("GDB set inferior command line to '%s'", cmdline);
 			free(target->semihosting->cmdline);
 			target->semihosting->cmdline = cmdline;
@@ -3142,7 +3142,7 @@ static int gdb_v_packet(struct connection *connection,
 		length = packet_size - (parse - packet);
 
 		/* create a new image if there isn't already one */
-		if (gdb_connection->vflash_image == NULL) {
+		if (!gdb_connection->vflash_image) {
 			gdb_connection->vflash_image = malloc(sizeof(struct image));
 			image_open(gdb_connection->vflash_image, "", "build");
 		}
@@ -3531,7 +3531,7 @@ static int gdb_target_start(struct target *target, const char *port)
 	int ret;
 	gdb_service = malloc(sizeof(struct gdb_service));
 
-	if (NULL == gdb_service)
+	if (!gdb_service)
 		return -ENOMEM;
 
 	LOG_INFO("starting gdb server for %s on %s", target_name(target), port);
@@ -3615,12 +3615,12 @@ static int gdb_target_add_one(struct target *target)
 
 int gdb_target_add_all(struct target *target)
 {
-	if (NULL == target) {
+	if (!target) {
 		LOG_WARNING("gdb services need one or more targets defined");
 		return ERROR_OK;
 	}
 
-	while (NULL != target) {
+	while (target) {
 		int retval = gdb_target_add_one(target);
 		if (retval != ERROR_OK)
 			return retval;
@@ -3636,7 +3636,7 @@ COMMAND_HANDLER(handle_gdb_sync_command)
 	if (CMD_ARGC != 0)
 		return ERROR_COMMAND_SYNTAX_ERROR;
 
-	if (current_gdb_connection == NULL) {
+	if (!current_gdb_connection) {
 		command_print(CMD,
 			"gdb_sync command can only be run from within gdb using \"monitor gdb_sync\"");
 		return ERROR_FAIL;
@@ -3745,7 +3745,7 @@ COMMAND_HANDLER(handle_gdb_save_tdesc_command)
 	size_t size_written;
 
 	char *tdesc_filename = alloc_printf("%s.xml", target_type_name(target));
-	if (tdesc_filename == NULL) {
+	if (!tdesc_filename) {
 		retval = ERROR_FAIL;
 		goto out;
 	}
diff --git a/src/server/server.c b/src/server/server.c
index 5f18efc..6f0b23c 100644
--- a/src/server/server.c
+++ b/src/server/server.c
@@ -263,11 +263,11 @@ int add_service(char *name,
 		memset(&c->sin, 0, sizeof(c->sin));
 		c->sin.sin_family = AF_INET;
 
-		if (bindto_name == NULL)
+		if (!bindto_name)
 			c->sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 		else {
 			hp = gethostbyname(bindto_name);
-			if (hp == NULL) {
+			if (!hp) {
 				LOG_ERROR("couldn't resolve bindto address: %s", bindto_name);
 				close_socket(c->fd);
 				free_service(c);
diff --git a/src/server/tcl_server.c b/src/server/tcl_server.c
index 1ecb827..92a8026 100644
--- a/src/server/tcl_server.c
+++ b/src/server/tcl_server.c
@@ -145,12 +145,12 @@ static int tcl_new_connection(struct connection *connection)
 	struct tcl_connection *tclc;
 
 	tclc = calloc(1, sizeof(struct tcl_connection));
-	if (tclc == NULL)
+	if (!tclc)
 		return ERROR_CONNECTION_REJECTED;
 
 	tclc->tc_line_size = TCL_LINE_INITIAL;
 	tclc->tc_line = malloc(tclc->tc_line_size);
-	if (tclc->tc_line == NULL) {
+	if (!tclc->tc_line) {
 		free(tclc);
 		return ERROR_CONNECTION_REJECTED;
 	}
@@ -158,7 +158,7 @@ static int tcl_new_connection(struct connection *connection)
 	connection->priv = tclc;
 
 	struct target *target = get_current_target_or_null(connection->cmd_ctx);
-	if (target != NULL)
+	if (target)
 		tclc->tc_laststate = target->state;
 
 	/* store the connection object on cmd_ctx so we can access it from command handlers */
@@ -192,7 +192,7 @@ static int tcl_input(struct connection *connection)
 	}
 
 	tclc = connection->priv;
-	if (tclc == NULL)
+	if (!tclc)
 		return ERROR_CONNECTION_REJECTED;
 
 	/* push as much data into the line as possible */
@@ -215,7 +215,7 @@ static int tcl_input(struct connection *connection)
 				tc_line_size_new = TCL_LINE_MAX;
 
 			tc_line_new = realloc(tclc->tc_line, tc_line_size_new);
-			if (tc_line_new == NULL) {
+			if (!tc_line_new) {
 				tclc->tc_linedrop = 1;
 			} else {
 				tclc->tc_line = tc_line_new;
diff --git a/src/server/telnet_server.c b/src/server/telnet_server.c
index 2ad3791..b01046d 100644
--- a/src/server/telnet_server.c
+++ b/src/server/telnet_server.c
@@ -150,7 +150,7 @@ static void telnet_load_history(struct telnet_connection *t_con)
 
 	char *history = get_home_dir(TELNET_HISTORY);
 
-	if (history == NULL) {
+	if (!history) {
 		LOG_INFO("unable to get user home directory, telnet history will be disabled");
 		return;
 	}
@@ -186,7 +186,7 @@ static void telnet_save_history(struct telnet_connection *t_con)
 
 	char *history = get_home_dir(TELNET_HISTORY);
 
-	if (history == NULL) {
+	if (!history) {
 		LOG_INFO("unable to get user home directory, telnet history will be disabled");
 		return;
 	}