ASCII_IS_DIG() / ASCII_IsDig()

Determines whether a character is a decimal-digit character.

lib_ascii.h/lib_ascii.c

          ASCII_IS_DIG(c);
           
          CPU_BOOLEAN  ASCII_IsDig (CPU_CHAR  c);

c

Character to examine.

DEF_YES,

if character is a decimal-digit character;

DEF_NO,

if character is not a decimal-digit character.

None.

ISO/IEC 9899:TC2, Section 7.4.1.5.(2) states that “isdigit() … tests for any decimal-digit character”.

          CPU_CHAR     c;
          CPU_BOOLEAN  dig;
           
          c   = ASCII_CHAR_DIGIT_SEVEN;
          dig = ASCII_IS_DIG(c);