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lib_ascii.h/lib_ascii.c

Prototypes

Code Block
LanguageC++
CaptionTextCAPTION
languagecpp
          ASCII_IS_CTRL(cch);
           
          CPU_BOOLEAN  ASCII_IsCtrl (CPU_CHAR  cch);


Arguments

cch

Character to examine.

Returned Value

...

ISO/IEC 9899:TC2, Section 7.4.1.4.(2) states that “iscntrl() ... tests for any control character”. ISO/IEC 9899:TC2, Section 7.4.(3), Note 169, states that in “the seven-bit US ASCII character set, ... the control characters are those whose values lie from 0 (NUL) through 0x1F (US), and the character 0x7F (DEL)”.

Example Usage

Code Block
LanguageC++
CaptionTextCAPTION
languagecpp
          CPU_CHAR     cch;
          CPU_BOOLEAN  ctrl;


                  ch  c    = ASCII_CHAR_DELETE;
          ctrl = ASCII_IS_CTRL(cch);