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tag_table: convert to a struct

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The struct is smaller because it is sparse.  Its traversal is also
more efficient.
This commit is contained in:
Max Kellermann 2012-02-11 10:34:21 +01:00
parent 6e05071a47
commit 767ade02f4
3 changed files with 22 additions and 14 deletions
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11
src/decoder/mp4ff_decoder_plugin.c
View File

@ -356,16 +356,17 @@ mp4_decode(struct decoder *mpd_decoder, struct input_stream *input_stream)
mp4ff_close(mp4fh);
}
static const char *const mp4ff_tag_names[TAG_NUM_OF_ITEM_TYPES] = {
[TAG_ALBUM_ARTIST] = "album artist",
[TAG_COMPOSER] = "writer",
[TAG_PERFORMER] = "band",
static const struct tag_table mp4ff_tags[] = {
{ "album artist", TAG_ALBUM_ARTIST },
{ "writer", TAG_COMPOSER },
{ "band", TAG_PERFORMER },
{ NULL, TAG_NUM_OF_ITEM_TYPES }
};
static enum tag_type
mp4ff_tag_name_parse(const char *name)
{
enum tag_type type = tag_table_lookup(mp4ff_tag_names, name);
enum tag_type type = tag_table_lookup_i(mp4ff_tags, name);
if (type == TAG_NUM_OF_ITEM_TYPES)
type = tag_name_parse_i(name);

9
src/tag_ape.c
View File

@ -23,15 +23,16 @@
#include "tag_table.h"
#include "ape.h"
static const char *const ape_tag_names[TAG_NUM_OF_ITEM_TYPES] = {
[TAG_ALBUM_ARTIST] = "album artist",
[TAG_DATE] = "year",
static const struct tag_table ape_tags[] = {
{ "album artist", TAG_ALBUM_ARTIST },
{ "year", TAG_DATE },
{ NULL, TAG_NUM_OF_ITEM_TYPES }
};
static enum tag_type
tag_ape_name_parse(const char *name)
{
enum tag_type type = tag_table_lookup(ape_tag_names, name);
enum tag_type type = tag_table_lookup_i(ape_tags, name);
if (type == TAG_NUM_OF_ITEM_TYPES)
type = tag_name_parse_i(name);

16
src/tag_table.h
View File

@ -24,18 +24,24 @@
#include <glib.h>
struct tag_table {
const char *name;
enum tag_type type;
};
/**
* Looks up a string in a tag translation table (case insensitive).
* Returns TAG_NUM_OF_ITEM_TYPES if the specified name was not found
* in the table.
*/
G_GNUC_PURE
static inline enum tag_type
tag_table_lookup(const char *const* table, const char *name)
tag_table_lookup_i(const struct tag_table *table, const char *name)
{
for (unsigned i = 0; i < TAG_NUM_OF_ITEM_TYPES; i++)
if (table[i] != NULL &&
g_ascii_strcasecmp(name, table[i]) == 0)
return (enum tag_type)i;
for (; table->name != NULL; ++table)
if (g_ascii_strcasecmp(name, table->name) == 0)
return table->type;
return TAG_NUM_OF_ITEM_TYPES;
}