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downcase.c

/*
 *    fhist - file history and comparison tools
 *    Copyright (C) 1998, 2002 Peter Miller;
 *    All rights reserved.
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program 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 General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: functions to manipulate downcases
 */

#include <sub/downcase.h>
#include <sub/private.h>
#include <trace.h>
#include <wstr_list.h>


/*
 * NAME
 *    sub_downcase - the downcase substitution
 *
 * SYNOPSIS
 *    wstring_ty *sub_downcase(wstring_list_ty *arg);
 *
 * DESCRIPTION
 *    The sub_downcase function implements the downcase substitution.
 *    The downcase substitution is replaced by the single argument
 *    mapped to lower case.
 *
 *    Requires exactly one argument.
 *
 * ARGUMENTS
 *    arg   - list of arguments, including the function name as [0]
 *
 * RETURNS
 *    a pointer to a string in dynamic memory;
 *    or NULL on error, setting suberr appropriately.
 */

wstring_ty *
sub_downcase(sub_context_ty *scp, wstring_list_ty *arg)
{
    wstring_ty      *result;

    trace(("sub_downcase()\n{\n"));
    if (arg->nitems != 2)
    {
      sub_context_error_set(scp, i18n("requires one argument"));
      result = 0;
    }
    else
      result = wstr_to_lower(arg->item[1]);
    trace(("return %8.8lX;\n", (long)result));
    trace(("}\n"));
    return result;
}

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