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/*
* cook - file construction tool
* Copyright (C) 1999, 2006, 2007 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 path_cats
*/
#include <common/os_path_cat.h>
#include <common/str.h>
string_ty *
os_path_cat(string_ty *lhs, string_ty *rhs)
{
static string_ty *dot;
size_t lhs_len;
if (!dot)
dot = str_from_c(".");
if (!lhs)
lhs = dot;
if (!rhs)
rhs = dot;
if (rhs->str_text[0] == '/')
return str_copy(rhs);
if (str_equal(lhs, dot))
return str_copy(rhs);
if (str_equal(rhs, dot))
return str_copy(lhs);
lhs_len = lhs->str_length;
while (lhs_len > 0 && lhs->str_text[lhs_len - 1] == '/')
--lhs_len;
return str_format("%.*s/%s", (int)lhs_len, lhs->str_text, rhs->str_text);
}
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