ASCII_TO_LOWER() / ASCII_ToLower()

Converts an uppercase alphabetic character to its corresponding lowercase alphabetic character.

Files

lib_ascii.h/lib_ascii.c

Prototypes

          ASCII_TO_LOWER(c);
           
          CPU_CHAR  ASCII_ToLower (CPU_CHAR  c);

Arguments

c

Character to examine.

Returned Value

Lowercase equivalent of c, if character c is an uppercase character;

Character c, otherwise.

Required Configuration

None.

Notes / Warnings

ISO/IEC 9899:TC2, Section 7.4.2.1.(2) states that “tolower() ... converts an uppercase letter to a corresponding lowercase letter”. ISO/IEC 9899:TC2, Section 7.4.2.1.(3) states that “if the argument is a character for which isupper() is true and there are one or more corresponding characters ... for which islower() is true, ... tolower() ... returns one of the corresponding characters; ... otherwise, the argument is returned unchanged”.

Example Usage

          CPU_CHAR  c;
          CPU_CHAR  c_lower;
           
          c       = ASCII_CHAR_LATIN_UPPER_G;
          c_lower = ASCII_TO_LOWER(c);