[v3] Revised locale caches

[B. Kosnik]

>We aim to please :-)

Sorry about the delay.

You'll find enclosed something that I think is the way to go. It's
zero-alloc, as fast as mainline, per-facet, extensible for user-defined
facets, removes the known issues and problems with the current approach,
etc, etc etc.

This is somewhat like the libstdc++-v3.20030429-base-idea sources, in
that the facet is now made up of the cache, not the other way around.
Encapsulation seems like a better way to go with this.

I have to add three test cases around the caching issue, but I'll do it
later.

Let me know what you think. I'd like to go through and do num_get
(painless now), as well as the other data facets (__timepunct,
__moneypuncts) in a similar style.

best,
benjamin

tested x86/linux
tested x86/linux --enable-clocale=generic

2003-06-26  Benjamin Kosnik  <bkoz@redhat.com>

	* include/bits/ios_base.h (ios_base::_M_getloc): Return reference
	to the imbued locale.
	* include/bits/locale_facets.tcc (num_put::_M_convert_int): Use
	_M_getloc.
	(num_put::_M_convert_float): Use.

2003-06-26  Benjamin Kosnik  <bkoz@redhat.com>
	    Jerry Quinn  <jlquinn@optonline.net>

	* config/linker-map.gnu: Add __numpunct_cache.
	* config/locale/gnu/numeric_members.cc
	(numpunct::_M_initialize_numpunct): Account for _M_data, fill in
	all elements for "C" locale.
	(numpunct::~numpunct): Delete _M_data.
	* config/locale/generic/numeric_members.cc: Same.	
	* include/bits/basic_ios.tcc
	(basic_ios::init): Remove __locale_cache bits.
	(basic_ios::_M_cache_locale): Same.
	* include/bits/ios_base.h: Same. Tweaks. 
	* include/bits/locale_classes.h: Tweaks. Reorder classes.
	(__use_cache): Make friends with _Impl, locale.
	(_Impl::_M_caches): Add.
	(_Impl::_M_install_cache): Add.
	* include/bits/locale_facets.h (__numpunct_cache): New.
	(numpunct): Encapsulate data members in __numpunct_cache member,
	_M_data. Adjust virtuals.
	(numpunct::numpunct): New ctor for the same. 
	(__locale_cache_base): Remove.
	(__locale_cache): Remove.	
	* include/bits/locale_facets.tcc (__use_cache): New function,
	specializations.
	(num_put::_M_convert_int, _M_convert_float, do_put): Use it.
	* src/globals.cc: Add cache_vec, numpunct_cache_c, numpunct_cache_w.
	* src/ios.cc (ios_base::ios_base): Remove __locale_cache.
	* src/locale-inst.cc: Same. Add __numpunct_cache.
	* src/locale.cc: Tweak inlines.
	(__use_cache): Define specializations.
	* src/localename.cc: Use global bits.
	(_Impl::~Impl): Deal with __numpunct_cache destruction.
	(_Impl::_Impl): Same. Pre-cache standard numpunct facets.
	(_Impl::_M_init_facet): Take into account __numpunct_cache.
	* testsuite/27_io/ios_base/cons/assign_neg.cc: Update line numbers.
	* testsuite/27_io/ios_base/cons/copy_neg.cc: Same.


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