Commit 194c8c3c authored by Eric Wong's avatar Eric Wong Committed by Max Kellermann

tag: introduce handy items_size() function

Trying to read or remember "tag->numOfItems * sizeof(*tag->items)" requires too much thinking and mental effort on my part. Also, favor "sizeof(struct mpd_tag)" over "sizeof(*tag->items)" because the former is easier to read and follow, even though the latter is easier to modify if the items member changes to a different type.
parent 4dd9d4b2
......@@ -55,6 +55,11 @@ const char *mpdTagItemKeys[TAG_NUM_OF_ITEM_TYPES] = {
mpd_sint8 ignoreTagItems[TAG_NUM_OF_ITEM_TYPES];
static size_t items_size(const struct tag *tag)
{
return (tag->numOfItems * sizeof(struct tag_item));
}
void tag_lib_init(void)
{
int quit = 0;
......@@ -248,8 +253,7 @@ static void deleteItem(struct tag *tag, int idx)
}
if (tag->numOfItems > 0) {
tag->items = xrealloc(tag->items,
tag->numOfItems * sizeof(*tag->items));
tag->items = xrealloc(tag->items, items_size(tag));
} else {
free(tag->items);
tag->items = NULL;
......@@ -311,7 +315,7 @@ struct tag *tag_dup(const struct tag *tag)
ret = tag_new();
ret->time = tag->time;
ret->numOfItems = tag->numOfItems;
ret->items = xmalloc(ret->numOfItems * sizeof(ret->items[0]));
ret->items = ret->numOfItems > 0 ? xmalloc(items_size(tag)) : NULL;
for (i = 0; i < tag->numOfItems; i++) {
ret->items[i] = tag_pool_dup_item(tag->items[i]);
......@@ -381,10 +385,8 @@ void tag_end_add(struct tag *tag)
if (tag->numOfItems > 0) {
/* copy the tag items from the bulk list over
to a new list (which fits exactly) */
tag->items = xmalloc(tag->numOfItems *
sizeof(tag->items[0]));
memcpy(tag->items, bulk.items,
tag->numOfItems * sizeof(tag->items[0]));
tag->items = xmalloc(items_size(tag));
memcpy(tag->items, bulk.items, items_size(tag));
} else
tag->items = NULL;
}
......@@ -416,15 +418,14 @@ static void appendToTagItems(struct tag *tag, enum tag_type type,
if (tag->items != bulk.items)
/* bulk mode disabled */
tag->items = xrealloc(tag->items,
tag->numOfItems * sizeof(*tag->items));
tag->items = xrealloc(tag->items, items_size(tag));
else if (tag->numOfItems >= BULK_MAX) {
/* bulk list already full - switch back to non-bulk */
assert(bulk.busy);
tag->items = xmalloc(tag->numOfItems * sizeof(tag->items[0]));
tag->items = xmalloc(items_size(tag));
memcpy(tag->items, bulk.items,
(tag->numOfItems - 1) * sizeof(tag->items[0]));
items_size(tag) - sizeof(struct tag_item));
}
tag->items[i] = tag_pool_get_item(type, p, len);
......
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