Instead of passing tag and group, pass an array of tags. To support a
nested return value, return a nested std::map of std::maps. Each key
specifies the tag value, and each value may be another nesting level.
Closes https://github.com/MusicPlayerDaemon/MPD/issues/408
Since we switched from autotools to Meson in commit
94592c1406, we don't need to include
`config.h` early to properly enable large file support. Meson passes
the required macros on the compiler command line instead of defining
them in `config.h`.
This means we can include `config.h` at any time, whenever we want to
check its macros, and there are no ordering constraints.
Grouping in the "list" command was completely broken from the start,
unlike "count group". I have no idea what I have been thinking when I
wrote commit ae178c77bd, but it didn't
make any sense.
This commit is a rewrite of the feature.
For clients to be able to detect this feature, this commit also
increments the protocol version.
The duration of a song can have fractions of seconds
(quote from http://www.upnp.org/schemas/av/didl-lite-v2.xsd):
The format of the duration string is:
H+:MM:SS[.F+], or H+:MM:SS[.F0/F1]
Where:
+H one or more digits to indicate elapsed hours,
MM exactly 2 digits to indicate minutes (00 to 59),
SS exactly 2 digits to indicate seconds (00 to 59),
F+ any number of digits (including no digits) to indicate fractions of seconds,
F0/F1 a fraction, with F0 and F1 at least one digit long,
and F0 < F1.
The string may be preceded by an optional + or - sign, and the
decimal point itself may be omitted if there are no fractional seconds digits.
Until now, a duration with fractions of seconds could not be parsed and
resulted in an unknown duration. Only durations in the format "H+:MM:SS"
were feasible. This commit enables to read durations in the first format,
i.e. "H+:MM:SS[.F+]"
We can do CURL requests asynchronously, and we don't need a
synchronous WorkQueue thread for that.
This allows parallelizing lookups and allows immediate cancellation.
