/* truncate.c: truncate too-long components in a filename.

/* truncate.c: truncate too-long components in a filename.

Copyright 1993, 1995, 2008, 2010 Karl Berry.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this library; if not, see <http://www.gnu.org/licenses/>. */

#include <kpathsea/config.h>

#include <kpathsea/c-namemx.h>
#include <kpathsea/c-pathch.h>
#include <kpathsea/c-pathmx.h>
#include <kpathsea/truncate.h>

/* Truncate any too-long components in NAME, returning the result. It's
too bad this is necessary. See comments in readable.c for why. */

string
kpathsea_truncate_filename (kpathsea kpse, const_string name)
{
unsigned c_len = 0; /* Length of current component. */
unsigned ret_len = 0; /* Length of constructed result. */

/* Allocate enough space. */
string ret = (string) xmalloc (strlen (name) + 1);

(void)kpse; /* currenty not used */

for (; *name; name++)
{
if (IS_DIR_SEP (*name) || IS_DEVICE_SEP (*name))
{ /* At a directory delimiter, reset component length. */
c_len = 0;
}
else if (c_len > NAME_MAX)
{ /* If past the max for a component, ignore this character. */
continue;
}

/* Copy this character. */
ret[ret_len++] = *name;
c_len++;
}
ret[ret_len] = 0;

return ret;
}