Edit File: relocatable.h
/* Provide relocatable packages. Copyright (C) 2003, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef _RELOCATABLE_H #define _RELOCATABLE_H #ifdef __cplusplus extern "C" { #endif /* 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 HAVE_VISIBILITY && BUILDING_DLL # define RELOCATABLE_DLL_EXPORTED __attribute__((__visibility__("default"))) #elif 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 #ifdef __cplusplus } #endif #endif /* _RELOCATABLE_H */
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