Returns the address of the last occurrence of a given character
    in a null-terminated string.

    Format

      #include  <string.h>

      char *strrchr  (const char *str, int character);

1 - Function Variants

    The strrchr function has variants named _strrchr32 and _strrchr64
    for use with 32-bit and 64-bit pointer sizes, respectively.

2 - Arguments

 str

    A pointer to a null-terminated character string.

 character

    An object of type int.

3 - Description

    This function returns the address of the last occurrence of a
    given character in a null-terminated string. The terminating null
    character is considered to be part of the string.

    Compare with strchr, which returns the address of the first
    occurrence of a given character in a null-terminated string.

4 - Return Values

    x                  The address of the last occurrence of the
                       specified character.
    NULL               Indicates that the character does not occur in
                       the string.