src/include/_ctype.h, branch upstream/11.0.0

Commit log from Dragonfly:

2015-10-13T20:43:49Z

FreeBSD extended ctypes to include numbers (e.g. isnumber()) but never actually implemented it. The isnumber() function was equivalent to the isdigit() function in every case. Now that DragonFly's ctype source files have number definitions, the number ctype can finally be implemented. It's given a new flag _CTYPE_N. The isalnum() and iswalnum() functions have been changed to use this flag rather than the _CTYPE_D digit flag. While isalnum(), isnumber(), and their wide equivalents now return different values in locale cases, the ishexnumber() and iswhexnumber() functions are unchanged. They are still aliases for isxdigit() and iswxdigit(). Also change ctype.h for isdigit and isxdigit to use sbistype like the other functions. Obtained from: dragonfly

Remove the Berkeley clause 3's.

2010-02-16T19:39:50Z

Add a few $FreeBSD$

Back out not human readable optimization in prev. commit which shown

2007-11-01T03:18:02Z

to generate 3bytes longer opcode.

Micro-optimization of prev. commit, change

2007-10-27T22:32:27Z

(_c < 0 || _c >= 128) to (_c & ~0x7F)

Small improvement for isctype(): don't use mb_sb_limit but

2007-10-27T09:32:32Z

hardcode 128 here instead, since default locale never define anything above 127 char.

The problem is: currently our single byte ctype(3) functions are broken

2007-10-13T16:28:22Z

for wide characters locales in the argument range >= 0x80 - they may return false positives. Example 1: for UTF-8 locale we currently have: iswspace(0xA0)==1 and isspace(0xA0)==1 (because iswspace() and isspace() are the same code) but must have iswspace(0xA0)==1 and isspace(0xA0)==0 (because there is no such character and all others in the range 0x80..0xff for the UTF-8 locale, it keeps ASCII only in the single byte range because our internal wchar_t representation for UTF-8 is UCS-4). Example 2: for all wide character locales isalpha(arg) when arg > 0xFF may return false positives (must be 0). (because iswalpha() and isalpha() are the same code) This change address this issue separating single byte and wide ctype and also fix iswascii() (currently iswascii() is broken for arguments > 0xFF). This change is 100% binary compatible with old binaries. Reviewied by: i18n@

Let GCC know that _runetype(), _tolower() and ___toupper() are pure

2004-08-21T07:00:40Z

functions, allowing it to generate better code for the and functions. For example, it can now keep _CurrentRuneLocale in a register across calls to these functions, and can delete calls to ___runetype() if the result is already known or not used.

Implement wcwidth() as an inline function.

2004-08-12T12:19:11Z

Move some internal macros and inlines from ctype.h to a new file, _ctype.h,

2004-08-12T09:33:47Z

which has been repo-copied from ctype.h. This will allow us to remove namespace pollution from and to make wcwidth() an inline function without introducing more pollution.

Now that no longer brings in namespace pollution,

2004-06-23T07:11:39Z

bring back the inline functions for the !__BSD_VISIBLE case.