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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;
}