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locale.cc (locale::locale(const char* __name)): Consolidate name setting.

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2000-09-15  Benjamin Kosnik  <bkoz@purist.soma.redhat.com>

	* src/locale.cc (locale::locale(const char* __name)): Consolidate
	name setting. Add checks for NULL __name pointers. Remove calls to
	_S_initialize() as initial locale initialization can either be
	assumed, or needs to be made consistent throughout locale
	construtors.
	(locale::locale(const locale& __other, const char* __name,
	category __cat): Add checks for NULL name. Add checks for
	assignment to self.
	* src/localename.cc (locale::_Impl:: _Impl(const _Impl& __other,
	const string& __name, category __cat, size_t __refs)): Set correct
	name, has_name values.
	* testsuite/22_locale/ctor_copy_dtor.cc (test01): More tests.
	* docs/22_locale/locale.html: New file, more unfinished docs...

From-SVN: r36450
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Benjamin Kosnik 2000-09-15 22:50:11 +00:00
parent 4c4b521a59
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<HTML>
<HEAD>
<H1>
Notes on the locale implementation.
</H1>
</HEAD>
<I>
prepared by Benjamin Kosnik (bkoz@redhat.com) on September 15, 2000
</I>
<P>
<H2>
1. Abstract
</H2>
<P>
</P>
<P>
<H2>
2. What the standard says
</H2>
<P>
<H2>
3. Problems with &quot;C&quot; locales : global locales, termination.
</H2>
<P>
For the required specialization codecvt&lt;wchar_t, char, mbstate_t&gt; ,
conversions are made between the internal character set (always UCS4
on GNU/Linux) and whatever the currently selected locale for the
LC_CTYPE category implements.
<P>
<H2>
4. Design
</H2>
The two required specializations are implemented as follows:
<P>
<H2>
5. Examples
</H2>
<pre>
typedef ctype<char> cctype;
</pre>
More information can be found in the following testcases:
<UL>
<LI> testsuite/22_locale/ctype_char_members.cc
<LI> testsuite/22_locale/ctype_wchar_t_members.cc
</UL>
<P>
<H2>
6. Unresolved Issues
</H2>
<UL>
<LI> locale -a displays available locales on linux
<LI> locale initialization: at what point does _S_classic,
_S_global get initialized? Can named locales assume this
initialization has already taken place?
</UL>
<P>
<H2>
7. Acknowledgments
</H2>
<P>
<H2>
8. Bibliography / Referenced Documents
</H2>
Drepper, Ulrich, GNU libc (glibc) 2.2 manual. In particular, Chapters &quot;6. Character Set Handling&quot; and &quot;7 Locales and Internationalization&quot;
<P>
Drepper, Ulrich, Numerous, late-night email correspondence
<P>
ISO/IEC 14882:1998 Programming languages - C++
<P>
ISO/IEC 9899:1999 Programming languages - C
<P>
Langer, Angelika and Klaus Kreft, Standard C++ IOStreams and Locales, Advanced Programmer's Guide and Reference, Addison Wesley Longman, Inc. 2000
<P>
Stroustrup, Bjarne, Appendix D, The C++ Programming Language, Special Edition, Addison Wesley, Inc. 2000
<P>
System Interface Definitions, Issue 6 (IEEE Std. 1003.1-200x)
The Open Group/The Institute of Electrical and Electronics Engineers, Inc.
http://www.opennc.org/austin/docreg.html