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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "ApeTag.hxx"
#include "ApeLoader.hxx"
#include "Tag.hxx"
#include "TagTable.hxx"
#include "TagHandler.hxx"
#include "fs/Path.hxx"
#include <string>
#include <string.h>
const struct tag_table ape_tags[] = {
{ "album artist", TAG_ALBUM_ARTIST },
{ "year", TAG_DATE },
{ nullptr, TAG_NUM_OF_ITEM_TYPES }
};
static TagType
tag_ape_name_parse(const char *name)
{
TagType type = tag_table_lookup_i(ape_tags, name);
if (type == TAG_NUM_OF_ITEM_TYPES)
type = tag_name_parse_i(name);
return type;
}
/**
* Invoke the given callback for each string inside the given range.
* The strings are separated by null bytes, but the last one may not
* be terminated.
*/
template<typename C>
static void
ForEachValue(const char *value, const char *end, C &&callback)
{
while (true) {
const char *n = (const char *)memchr(value, 0, end - value);
if (n == nullptr)
break;
if (n > value)
callback(value);
value = n + 1;
}
if (value < end) {
const std::string value2(value, end);
callback(value2.c_str());
}
}
/**
* @return true if the item was recognized
*/
static bool
tag_ape_import_item(unsigned long flags,
const char *key, const char *value, size_t value_length,
const struct tag_handler *handler, void *handler_ctx)
{
/* we only care about utf-8 text tags */
if ((flags & (0x3 << 1)) != 0)
return false;
const char *const end = value + value_length;
if (handler->pair != nullptr)
ForEachValue(value, end, [handler, handler_ctx,
key](const char *_value) {
handler->pair(key, _value, handler_ctx);
});
TagType type = tag_ape_name_parse(key);
if (type == TAG_NUM_OF_ITEM_TYPES)
return false;
ForEachValue(value, end, [handler, handler_ctx,
type](const char *_value) {
tag_handler_invoke_tag(handler, handler_ctx,
type, _value);
});
return true;
}
bool
tag_ape_scan2(Path path_fs,
const struct tag_handler *handler, void *handler_ctx)
{
bool recognized = false;
auto callback = [handler, handler_ctx, &recognized]
(unsigned long flags, const char *key,
const char *value,
size_t value_length) {
recognized |= tag_ape_import_item(flags, key, value,
value_length,
handler, handler_ctx);
return true;
};
return tag_ape_scan(path_fs, callback) && recognized;
}
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