| /* Provide relocatable packages. |
| Copyright (C) 2003 Free Software Foundation, Inc. |
| Written by Bruno Haible <bruno@clisp.org>, 2003. |
| |
| This program is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Library 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library 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. */ |
| |
| #ifndef _RELOCATABLE_H |
| #define _RELOCATABLE_H |
| |
| /* This can be enabled through the configure --enable-relocatable option. */ |
| #if ENABLE_RELOCATABLE |
| |
| /* When building a DLL, we must export some functions. Note that because |
| this is a private .h file, we don't need to use __declspec(dllimport) |
| in any case. */ |
| #if defined _MSC_VER && BUILDING_DLL |
| # define RELOCATABLE_DLL_EXPORTED __declspec(dllexport) |
| #else |
| # define RELOCATABLE_DLL_EXPORTED |
| #endif |
| |
| /* Sets the original and the current installation prefix of the package. |
| Relocation simply replaces a pathname starting with the original prefix |
| by the corresponding pathname with the current prefix instead. Both |
| prefixes should be directory names without trailing slash (i.e. use "" |
| instead of "/"). */ |
| extern RELOCATABLE_DLL_EXPORTED void |
| set_relocation_prefix (const char *orig_prefix, |
| const char *curr_prefix); |
| |
| /* Returns the pathname, relocated according to the current installation |
| directory. */ |
| extern const char * relocate (const char *pathname); |
| |
| /* Memory management: relocate() leaks memory, because it has to construct |
| a fresh pathname. If this is a problem because your program calls |
| relocate() frequently, think about caching the result. */ |
| |
| /* Convenience function: |
| Computes the current installation prefix, based on the original |
| installation prefix, the original installation directory of a particular |
| file, and the current pathname of this file. Returns NULL upon failure. */ |
| extern const char * compute_curr_prefix (const char *orig_installprefix, |
| const char *orig_installdir, |
| const char *curr_pathname); |
| |
| #else |
| |
| /* By default, we use the hardwired pathnames. */ |
| #define relocate(pathname) (pathname) |
| |
| #endif |
| |
| #endif /* _RELOCATABLE_H */ |