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expand.c
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C/C++ Source or Header
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1995-06-25
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2KB
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70 lines
/* expand.c: general expansion.
Copyright (C) 1993, 94 Karl Berry.
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, 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 02111-1307, USA. */
#include <kpathsea/config.h>
#include <kpathsea/c-pathch.h>
#include <kpathsea/expand.h>
#include <kpathsea/pathsearch.h>
#include <kpathsea/tilde.h>
#include <kpathsea/variable.h>
/* Do variable expansion so ~${USER} will work. (Besides, it's what the
shells do.) */
string
kpse_expand P1C(const_string, s)
{
string var_expansion = kpse_var_expand (s);
string tilde_expansion = kpse_tilde_expand (var_expansion);
/* `kpse_var_expand' always gives us new memory; `kpse_tilde_expand'
doesn't, necessarily. So be careful that we don't free what we are
about to return. */
if (tilde_expansion != var_expansion)
free (var_expansion);
return tilde_expansion;
}
/* Be careful to not waste all the memory we allocate for each element. */
string
kpse_path_expand P1C(const_string, path)
{
string elt;
string ret = xmalloc (1); /* so we can free it */
*ret = 0;
for (elt = kpse_path_element (path); elt; elt = kpse_path_element (NULL))
{
string save_ret = ret;
string elt_exp = kpse_expand (elt);
ret = concat3 (ret, elt_exp, ENV_SEP_STRING);
free (elt_exp);
free (save_ret);
}
/* Waste the last byte. */
ret[strlen (ret) - 1] = 0;
return ret;
}