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/*

FUNCTION

        <<strlwr>>---force string to lower case

INDEX

        strlwr

ANSI_SYNOPSIS

        #include <string.h>

        char *strlwr(char *<[a]>);

TRAD_SYNOPSIS

        #include <string.h>

        char *strlwr(<[a]>)

        char *<[a]>;

DESCRIPTION

        <<strlwr>> converts each characters in the string at <[a]> to

        lower case.

RETURNS

        <<strlwr>> returns its argument, <[a]>.

PORTABILITY

<<strlwr>> is not widely portable.

<<strlwr>> requires no supporting OS subroutines.

QUICKREF

        strlwr

*/

#include <string.h>

#include <ctype.h>

char *

strlwr (a)

     char *a;

{

  char *ret = a;

  while (*a != '\0')

    {

      if (isupper (*a))

        *a = tolower (*a);

      ++a;

    }

  return ret;

}