NAME
          case - convert ASCII uppercase bytes to lowercase

     SYNTAX
          #include <case.h>

          void case_lowers(s);
          void case_lowerb(s,len);

          int case_diffs(s,t);
          int case_equals(s,t);
          int case_starts(s,t);

          int case_diffb(s,len,t);
          int case_startb(s,len,t);

          char *s;
          char *t;
          unsigned int len;

     DESCRIPTION
          case_lowers converts each uppercase byte in the string s to
          lowercase.  s must be 0-terminated.

          case_lowerb converts each uppercase byte in the buffer s, of
          length len, to lowercase.

          case_diffs lexicographically compares lowercase versions of
          the strings s and t.  It returns something positive,
          negative, or zero when the first is larger than, smaller
          than, or equal to the second.  s and t must be 0-terminated.

          case_equals means !case_diffs.

          case_starts returns 1 if a lowercase version of s starts
          with a lowercase version of t.  s and t must be 0-
          terminated.

          case_diffb lexicographically compares lowercase versions of
          the buffers s and t, each of length len.  It returns
          something positive, negative, or zero when the first is
          larger than, smaller than, or equal to the second.

          case_startb returns 1 if a lowercase version of the buffer
          s, of length len, starts with a lowercase version of the
          string t.  t must be 0-terminated.

          The case routines are ASCII-specific.  They are suitable for
          programs that handle case-independent networking protocols.

          All comparisons are performed on unsigned bytes.

     SEE ALSO
          byte_diff(3), byte_equal(3), str_diff(3), str_equal(3),
          str_start(3)