CSA - CAN/CSA-ISO/IEC 9899:94
Information technology - Programming languages - C
|Publication Date:||1 January 1994|
This amendment defines extensions to ISO/IEC 9899: 1990 that provide a more complete set of multibyte and wide-character utilities, as well as alternative spellings for certain tokens. Use of these features can help promote international portability of C programs.
This amendment specifies extensions that affect various clauses of ISO/IEC 9899:1990
- To the compliance clause (clause 4). the additional header is provided by both freestanding and hosted implementations.
- To the language clause (clause 6), six additional tokens are accepted.
- To the Library clause (clause 7), new capabilities are specified for the existing formatted input/output functions (7.9.6).
- To the library clause (clause 7), the additional header is provided, which defines a macro, several types, and many functions, including:
- wide-character testing functions, iswalnum for example;
- extensible wide-character classification functions, wctype and iswctype;
- wide-character case-mapping functions, towlower and towupper;
- extensible widecharacter case-mapping functions, wctrans and towctrans.
- To the iibrary clause (clause 7), the additional header is provided, which defines several macros, several types, and many functions, including:
- formatted wide-character input/output functions, fwprintf for example;
- wide,-character input/output functions, fgetwc for example;
- wide-string numeric conversion functions, wcstad for example;
- wide-string general utility functions, wcscpy for example;
- a wide-string time conversion function, wcsftime;
- restartable muitibyte/wide-chara
cter conversion functions, mbrtowc for example;
- restantable multibytd/wide-strin
g conversion functions, mbsrtowcs and wcsrtombs.