degesch: introduce cstr_set()

2 files changed, 39 insertions, 74 deletions

diff --git a/common.c b/common.c
index bd5184c..a735aeb 100644
--- a/common.c
+++ b/common.c
@@ -51,6 +51,13 @@ init_openssl (void)
 
 // --- To be moved to liberty --------------------------------------------------
 
+static void
+cstr_set (char **s, char *new)
+{
+	free (*s);
+	*s = new;
+}
+
 static ssize_t
 strv_find (const struct strv *v, const char *s)
 {
diff --git a/degesch.c b/degesch.c
index 3ac042d..015c33c 100644
--- a/degesch.c
+++ b/degesch.c
@@ -320,8 +320,7 @@ static void
 input_rl_set_prompt (void *input, char *prompt)
 {
 	struct input_rl *self = input;
-	free (self->prompt);
-	self->prompt = prompt;
+	cstr_set (&self->prompt, prompt);
 
 	if (!self->active)
 		return;
@@ -543,8 +542,7 @@ input_rl__restore_buffer (struct input_rl *self, struct input_rl_buffer *buffer)
 		rl_replace_line (buffer->saved_line, true);
 		rl_point = buffer->saved_point;
 		rl_mark = buffer->saved_mark;
-		free (buffer->saved_line);
-		buffer->saved_line = NULL;
+		cstr_set (&buffer->saved_line, NULL);
 
 		if (self->prompt_shown > 0)
 			rl_redisplay ();
@@ -652,8 +650,7 @@ input_rl__restore (struct input_rl *self)
 	rl_replace_line (self->saved_line, false);
 	rl_point = self->saved_point;
 	rl_mark = self->saved_mark;
-	free (self->saved_line);
-	self->saved_line = NULL;
+	cstr_set (&self->saved_line, NULL);
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -834,8 +831,7 @@ static void
 input_el_set_prompt (void *input, char *prompt)
 {
 	struct input_el *self = input;
-	free (self->prompt);
-	self->prompt = prompt;
+	cstr_set (&self->prompt, prompt);
 
 	if (self->prompt_shown > 0)
 		input_el__redisplay (self);
@@ -1020,8 +1016,7 @@ input_el__restore_buffer (struct input_el *self, struct input_el_buffer *buffer)
 		el_winsertstr (self->editline, buffer->saved_line);
 		el_cursor (self->editline,
 			-(buffer->saved_len - buffer->saved_point));
-		free (buffer->saved_line);
-		buffer->saved_line = NULL;
+		cstr_set (&buffer->saved_line, NULL);
 	}
 }
 
@@ -2697,10 +2692,9 @@ on_config_attribute_change (struct config_item *item)
 	ssize_t id = attr_by_name (item->schema->name);
 	if (id != -1)
 	{
-		free (ctx->attrs[id]);
-		ctx->attrs[id] = xstrdup (item->type == CONFIG_ITEM_NULL
+		cstr_set (&ctx->attrs[id], xstrdup (item->type == CONFIG_ITEM_NULL
 			? ctx->attrs_defaults[id]
-			: item->value.string.str);
+			: item->value.string.str));
 	}
 }
 
@@ -4256,8 +4250,7 @@ buffer_rename (struct app_context *ctx,
 	buffer_close_log_file (buffer);
 	buffer_open_log_file (ctx, buffer);
 
-	free (buffer->name);
-	buffer->name = xstrdup (new_name);
+	cstr_set (&buffer->name, xstrdup (new_name));
 
 	// We might have renamed the current buffer
 	refresh_prompt (ctx);
@@ -4854,8 +4847,7 @@ irc_destroy_state (struct server *s)
 	}
 
 	str_reset (&s->irc_user_mode);
-	free (s->irc_user_host);
-	s->irc_user_host = NULL;
+	cstr_set (&s->irc_user_host, NULL);
 
 	s->cap_echo_message = false;
 
@@ -6753,8 +6745,7 @@ irc_handle_nick (struct server *s, const struct irc_message *msg)
 	str_map_set (&s->irc_users, user->nickname, NULL);
 	str_map_set (&s->irc_users, new_nickname, user);
 
-	free (user->nickname);
-	user->nickname = xstrdup (new_nickname);
+	cstr_set (&user->nickname, xstrdup (new_nickname));
 }
 
 static void
@@ -7066,10 +7057,7 @@ irc_handle_topic (struct server *s, const struct irc_message *msg)
 
 	// It would be is weird for this to be false
 	if (channel)
-	{
-		free (channel->topic);
-		channel->topic = xstrdup (topic);
-	}
+		cstr_set (&channel->topic, xstrdup (topic));
 
 	if (buffer)
 	{
@@ -7111,9 +7099,8 @@ irc_try_parse_word_for_userhost (struct server *s, const char *word)
 	bool result = false;
 	if (!regexec (&re, word, 2, matches, 0))
 	{
-		free (s->irc_user_host);
-		s->irc_user_host = xstrndup (word + matches[1].rm_so,
-			matches[1].rm_eo - matches[1].rm_so);
+		cstr_set (&s->irc_user_host, xstrndup (word + matches[1].rm_so,
+			matches[1].rm_eo - matches[1].rm_so));
 		result = true;
 	}
 	regfree (&re);
@@ -7140,7 +7127,7 @@ irc_on_registered (struct server *s, const char *nickname)
 {
 	s->irc_user = irc_get_or_make_user (s, nickname);
 	str_reset (&s->irc_user_mode);
-	s->irc_user_host = NULL;
+	cstr_set (&s->irc_user_host, NULL);
 
 	s->state = IRC_REGISTERED;
 	refresh_prompt (s->ctx);
@@ -7200,12 +7187,8 @@ irc_handle_rpl_userhost (struct server *s, const struct irc_message *msg)
 
 		char *userhost = equals + 2;
 		if (irc_is_this_us (s, nick))
-		{
-			free (s->irc_user_host);
-			s->irc_user_host = xstrdup (userhost);
-		}
+			cstr_set (&s->irc_user_host, xstrdup (userhost));
 	}
-
 	strv_free (&v);
 }
 
@@ -7401,10 +7384,7 @@ irc_handle_rpl_topic (struct server *s, const struct irc_message *msg)
 	hard_assert (channel || !buffer);
 
 	if (channel)
-	{
-		free (channel->topic);
-		channel->topic = xstrdup (topic);
-	}
+		cstr_set (&channel->topic, xstrdup (topic));
 
 	if (buffer)
 		log_server_status (s, buffer, "The topic is: #m", topic);
@@ -7541,11 +7521,8 @@ irc_handle_isupport_prefix (struct server *s, char *value)
 	if (*modes++ != '(' || !prefixes++ || strlen (value) != 2 * n_prefixes--)
 		return;
 
-	free (s->irc_chanuser_modes);
-	free (s->irc_chanuser_prefixes);
-
-	s->irc_chanuser_modes    = xstrndup (modes,    n_prefixes);
-	s->irc_chanuser_prefixes = xstrndup (prefixes, n_prefixes);
+	cstr_set (&s->irc_chanuser_modes,    xstrndup (modes,    n_prefixes));
+	cstr_set (&s->irc_chanuser_prefixes, xstrndup (prefixes, n_prefixes));
 }
 
 static void
@@ -7562,8 +7539,7 @@ irc_handle_isupport_casemapping (struct server *s, char *value)
 static void
 irc_handle_isupport_chantypes (struct server *s, char *value)
 {
-	free (s->irc_chantypes);
-	s->irc_chantypes = xstrdup (value);
+	cstr_set (&s->irc_chantypes, xstrdup (value));
 }
 
 static void
@@ -7581,16 +7557,13 @@ irc_handle_isupport_idchan (struct server *s, char *value)
 			str_append_data (&prefixes, pair, colon - pair);
 	}
 	strv_free (&v);
-
-	free (s->irc_idchan_prefixes);
-	s->irc_idchan_prefixes = str_steal (&prefixes);
+	cstr_set (&s->irc_idchan_prefixes, str_steal (&prefixes));
 }
 
 static void
 irc_handle_isupport_statusmsg (struct server *s, char *value)
 {
-	free (s->irc_statusmsg);
-	s->irc_statusmsg = xstrdup (value);
+	cstr_set (&s->irc_statusmsg, xstrdup (value));
 }
 
 static void
@@ -7600,14 +7573,10 @@ irc_handle_isupport_chanmodes (struct server *s, char *value)
 	cstr_split (value, ",", true, &v);
 	if (v.len >= 4)
 	{
-		free (s->irc_chanmodes_list);
-		s->irc_chanmodes_list           = xstrdup (v.vector[0]);
-		free (s->irc_chanmodes_param_always);
-		s->irc_chanmodes_param_always   = xstrdup (v.vector[1]);
-		free (s->irc_chanmodes_param_when_set);
-		s->irc_chanmodes_param_when_set = xstrdup (v.vector[2]);
-		free (s->irc_chanmodes_param_never);
-		s->irc_chanmodes_param_never    = xstrdup (v.vector[3]);
+		cstr_set (&s->irc_chanmodes_list,           xstrdup (v.vector[0]));
+		cstr_set (&s->irc_chanmodes_param_always,   xstrdup (v.vector[1]));
+		cstr_set (&s->irc_chanmodes_param_when_set, xstrdup (v.vector[2]));
+		cstr_set (&s->irc_chanmodes_param_never,    xstrdup (v.vector[3]));
 	}
 	strv_free (&v);
 }
@@ -8188,9 +8157,7 @@ server_rename (struct app_context *ctx, struct server *s, const char *new_name)
 	struct str_map *servers = get_servers_config (ctx);
 	str_map_set (servers, new_name, str_map_steal (servers, s->name));
 
-	free (s->name);
-	s->name = xstrdup (new_name);
-
+	cstr_set (&s->name, xstrdup (new_name));
 	buffer_rename (ctx, s->buffer, new_name);
 
 	struct str_map_iter iter = str_map_iter_make (&s->irc_buffer_map);
@@ -8366,8 +8333,7 @@ lua_plugin_handle_string_filter_result (struct lua_plugin *self,
 	lua_State *L = self->L;
 	if (lua_isnil (L, -1))
 	{
-		free (*original);
-		*original = NULL;
+		cstr_set (original, NULL);
 		return true;
 	}
 	if (!lua_isstring (L, -1))
@@ -8380,10 +8346,7 @@ lua_plugin_handle_string_filter_result (struct lua_plugin *self,
 
 	// Only replace the string if it's different
 	if (strcmp (processed, *original))
-	{
-		free (*original);
-		*original = xstrdup (processed);
-	}
+		cstr_set (original, xstrdup (processed));
 	return true;
 }
 
@@ -9889,8 +9852,7 @@ static void
 lua_wait_dial_on_error (void *user_data, const char *error)
 {
 	struct lua_wait_dial *self = user_data;
-	free (self->last_error);
-	self->last_error = xstrdup (error);
+	cstr_set (&self->last_error, xstrdup (error));
 }
 
 static int
@@ -10393,8 +10355,7 @@ plugin_load (struct app_context *ctx, const char *name)
 	{
 		// FIXME: this way the real name isn't available to the plugin on load,
 		//   which has effect on e.g. plugin_config_name()
-		free (plugin->name);
-		plugin->name = xstrdup (name);
+		cstr_set (&plugin->name, xstrdup (name));
 
 		log_global_status (ctx, "Plugin \"#s\" loaded", name);
 		LIST_PREPEND (ctx->plugins, plugin);
@@ -12431,8 +12392,7 @@ utf8_vector_to_locale (struct app_context *ctx, char **vector)
 		if (!soft_assert (converted))
 			converted = xstrdup ("");
 
-		free (*vector);
-		*vector = converted;
+		cstr_set (vector, converted);
 	}
 }
 
@@ -12647,9 +12607,7 @@ input_editor_cleanup (struct app_context *ctx)
 		log_global_error (ctx, "Could not unlink `#s': #l",
 			ctx->editor_filename, strerror (errno));
 
-	free (ctx->editor_filename);
-	ctx->editor_filename = NULL;
-
+	cstr_set (&ctx->editor_filename, NULL);
 	ctx->running_editor = false;
 }