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lib/yajl/Callbacks: OO wrapper for yajl_callbacks

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This commit is contained in:
Max Kellermann
2018-01-11 20:25:17 +01:00
parent 0211c7f7f3
commit 55d1473918
3 changed files with 125 additions and 51 deletions
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98
src/playlist/plugins/SoundCloudPlaylistPlugin.cxx
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@@ -22,6 +22,7 @@
#include "../PlaylistPlugin.hxx"
#include "../MemorySongEnumerator.hxx"
#include "lib/yajl/Handle.hxx"
#include "lib/yajl/Callbacks.hxx"
#include "lib/yajl/ParseInputStream.hxx"
#include "config/Block.hxx"
#include "input/InputStream.hxx"
@@ -109,111 +110,106 @@ struct SoundCloudJsonData {
int got_url = 0; /* nesting level of last stream_url */
std::forward_list<DetachedSong> songs;
bool Integer(long long value) noexcept;
bool String(StringView value) noexcept;
bool StartMap() noexcept;
bool MapKey(StringView value) noexcept;
bool EndMap() noexcept;
};
static int
handle_integer(void *ctx, long long intval)
inline bool
SoundCloudJsonData::Integer(long long intval) noexcept
{
auto *data = (SoundCloudJsonData *) ctx;
switch (data->key) {
switch (key) {
case SoundCloudJsonData::Key::DURATION:
data->duration = intval;
duration = intval;
break;
default:
break;
}
return 1;
return true;
}
static int
handle_string(void *ctx, const unsigned char *stringval, size_t stringlen)
inline bool
SoundCloudJsonData::String(StringView value) noexcept
{
auto *data = (SoundCloudJsonData *) ctx;
const char *s = (const char *) stringval;
switch (data->key) {
switch (key) {
case SoundCloudJsonData::Key::TITLE:
data->title.assign(s, stringlen);
title.assign(value.data, value.size);
break;
case SoundCloudJsonData::Key::STREAM_URL:
data->stream_url.assign(s, stringlen);
data->got_url = 1;
stream_url.assign(value.data, value.size);
got_url = 1;
break;
default:
break;
}
return 1;
return true;
}
static int
handle_mapkey(void *ctx, const unsigned char *stringval, size_t stringlen)
inline bool
SoundCloudJsonData::MapKey(StringView value) noexcept
{
auto *data = (SoundCloudJsonData *) ctx;
const auto *i = key_str;
while (*i != nullptr &&
!StringStartsWith(*i, {(const char *)stringval, stringlen}))
while (*i != nullptr && !StringStartsWith(*i, value))
++i;
data->key = SoundCloudJsonData::Key(i - key_str);
return 1;
key = SoundCloudJsonData::Key(i - key_str);
return true;
}
static int
handle_start_map(void *ctx)
inline bool
SoundCloudJsonData::StartMap() noexcept
{
auto *data = (SoundCloudJsonData *) ctx;
if (got_url > 0)
got_url++;
if (data->got_url > 0)
data->got_url++;
return 1;
return true;
}
static int
handle_end_map(void *ctx)
inline bool
SoundCloudJsonData::EndMap() noexcept
{
auto *data = (SoundCloudJsonData *) ctx;
if (data->got_url > 1) {
data->got_url--;
if (got_url > 1) {
got_url--;
return 1;
}
if (data->got_url == 0)
if (got_url == 0)
return 1;
/* got_url == 1, track finished, make it into a song */
data->got_url = 0;
got_url = 0;
const std::string u = data->stream_url + "?client_id=" +
const std::string u = stream_url + "?client_id=" +
soundcloud_config.apikey;
TagBuilder tag;
tag.SetDuration(SignedSongTime::FromMS(data->duration));
if (!data->title.empty())
tag.AddItem(TAG_NAME, data->title.c_str());
tag.SetDuration(SignedSongTime::FromMS(duration));
if (!title.empty())
tag.AddItem(TAG_NAME, title.c_str());
data->songs.emplace_front(u.c_str(), tag.Commit());
songs.emplace_front(u.c_str(), tag.Commit());
return 1;
return true;
}
using Wrapper = Yajl::CallbacksWrapper<SoundCloudJsonData>;
static constexpr yajl_callbacks parse_callbacks = {
nullptr,
nullptr,
handle_integer,
Wrapper::Integer,
nullptr,
nullptr,
handle_string,
handle_start_map,
handle_mapkey,
handle_end_map,
Wrapper::String,
Wrapper::StartMap,
Wrapper::MapKey,
Wrapper::EndMap,
nullptr,
nullptr,
};