123 lines
3.0 KiB
C++
123 lines
3.0 KiB
C++
/*
|
|
* Copyright 2003-2017 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 "util/StringView.hxx"
|
|
|
|
#include <string>
|
|
|
|
#include <string.h>
|
|
|
|
static constexpr struct tag_table ape_tags[] = {
|
|
{ "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, StringView value,
|
|
const TagHandler &handler, void *handler_ctx)
|
|
{
|
|
/* we only care about utf-8 text tags */
|
|
if ((flags & (0x3 << 1)) != 0)
|
|
return false;
|
|
|
|
const auto begin = value.begin();
|
|
const auto end = value.end();
|
|
|
|
if (handler.pair != nullptr)
|
|
ForEachValue(begin, 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(begin, end, [handler, handler_ctx,
|
|
type](const char *_value) {
|
|
tag_handler_invoke_tag(handler, handler_ctx,
|
|
type, _value);
|
|
});
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
tag_ape_scan2(InputStream &is,
|
|
const TagHandler &handler, void *handler_ctx)
|
|
{
|
|
bool recognized = false;
|
|
|
|
auto callback = [handler, handler_ctx, &recognized]
|
|
(unsigned long flags, const char *key,
|
|
StringView value) {
|
|
recognized |= tag_ape_import_item(flags, key, value,
|
|
handler, handler_ctx);
|
|
return true;
|
|
};
|
|
|
|
return tag_ape_scan(is, callback) && recognized;
|
|
}
|