Options parsing used to be ambiguous, as in the splitting into option
and values pairs was ambiguous. Example:
-option -something
It wasn't clear whether -option actually takes an argument or not. The
string "-something" could either be a separate option, or an argument
to "-option". The code had to call the option specific parser function
to resolve this.
This made everything complicated and didn't even have a real use. There
was only one case where this was actually used: string lists
(m_option_type_string_list) and options based on it. That is because
this option type actually turns a single option into a proxy for several
real arguments, e.g. "vf*" can handle "-vf-add" and "-vf-clr". Options
suffixed with "-clr" are the only options of this group which take no
arguments.
This is ambiguous only with the "old syntax" (as shown above). The "new"
option syntax always puts option name and value into same argument.
(E.g. "--option=--something" or "--option" "--something".)
Simplify the code by making it statically known whether an option takes
a parameter or not with the flag M_OPT_TYPE_OLD_SYNTAX_NO_PARAM. If it's
set, the option parser assumes the option takes no argument.
The only real ambiguity left, string list options that end on "-clr",
are special cased in the parser.
Remove some duplication of the logic in the command line parser by
moving all argument splitting logic into split_opt(). (It's arguable
whether that can be considered code duplication, but now the code is a
bit simpler anyway. This might be subjective.)
Remove the "ambiguous" parameter from all option parsing related code.
Make m_config unaware of the pre-parsing concept.
Make most CONF_NOCFG options also CONF_GLOBAL (except those explicitly
usable as per-file options.)
This reverts commit 48f0692ab9 "options: make option struct the talloc parent of options".
This made things actually more complicated. It introduced a new
parameter to the option parse and copy functions, which was used
inconsistently. Some code passed a parent, some not. Morever, you have
to call m_option_free() anyway, because not all options actually
respect the talloc parent. There is also the question whether passing
NULL as parent is supposed to work, or if you still have to implement
m_config_free().
On the other hand, this simplifies nothing. I assume the intention was
being able to free all option values with a single talloc_free() call,
but the same goal can be reached by simply freeing the m_config struct.
(The m_config talloc destructor will free each option values.)
Get rid of the talloc parent context parameter. This essentially
reverts commit 48f0692ab9 ("options: make option struct the talloc parent of options").
In video_out.c, make the VO priv struct the talloc parent for the
m_config object, so that destroying the VO will free the options.
The ability to free the m_config struct and all its managed options was
introduced in commit 89a17bcda6.
This was done with the help of callcatcher [1]. Only functions which
are statically known to be unused are removed.
Some unused functions are not removed yet, because they might be needed
in the near future (such as open_output_stream for the encode branch).
There is one user visible change: the --subcc option did nothing, and is
removed with this commit.
[1] http://www.skynet.ie/~caolan/Packages/callcatcher.html
Allocate dynamically-allocated option values as talloc children of the
option struct. This will allow implementing per-object (VO etc)
options so that simply freeing the object will free associated options
too.
This doesn't change quite every allocation in m_option.c, but the
exceptions are legacy types which will not matter for new per-object
options.
Each option type had three separate operations to copy option values
between memory locations: copy between general memory locations
("copy"), copy from general memory to active configuration of the
program ("set"), and in the other direction ("save"). No normal option
depends on this distinction any more. Change everything to define and
use a single "copy" operation only. Change the special options
"include" and "profile", which depended on hacky option types, to be
special-cased directly in option parsing instead. Remove the now
unused option types m_option_type_func and m_option_type_func_param.
Command line options like "-foo xyz" are ambiguous: "xyz" may be a
parameter to the option "foo" or an unrelated argument. Instead of
relying on the struct m_config mode field (commandline/file) pass
parameters to specify ambiguous mode explicitly. Meant for "--foo"
options which are never ambiguous on command line either.
Prerequisite for making stream_open filename const in a proper way.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@30737 b3059339-0415-0410-9bf9-f77b7e298cf2
declared const and moved from .data to .text/rodata sections.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24994 b3059339-0415-0410-9bf9-f77b7e298cf2
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