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- /* 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., 675 Mass Ave, Cambridge, MA 02139, 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;
- }
-