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/* str-casefold.c: make a string either all uppercase or all lowercase.
Copyright (C) 1992 Free Software Foundation, Inc.
This file was part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include "config.h"
#include "c-ctype.h"
#include "str-lcase.h"
/* Return a malloced copy of S with all its uppercase letters replaced
with their lowercase counterparts. S must not be NULL. */
string
str_to_lower (string s)
{
unsigned c;
string lc;
unsigned length;
assert (s != NULL);
length = strlen (s);
lc = xmalloc (length + 1);
for (c = 0; c < length; c++)
lc[c] = ISUPPER (s[c]) ? TOLOWER (s[c]) : s[c];
lc[length] = 0;
return lc;
}
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