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libiconv v1.14

    1: /* Provide relocatable packages.
    2:    Copyright (C) 2003, 2005, 2008-2011 Free Software Foundation, Inc.
    3:    Written by Bruno Haible <bruno@clisp.org>, 2003.
    4: 
    5:    This program is free software: you can redistribute it and/or modify
    6:    it under the terms of the GNU General Public License as published by
    7:    the Free Software Foundation; either version 3 of the License, or
    8:    (at your option) any later version.
    9: 
   10:    This program is distributed in the hope that it will be useful,
   11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   13:    GNU General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU General Public License
   16:    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
   17: 
   18: #ifndef _RELOCATABLE_H
   19: #define _RELOCATABLE_H
   20: 
   21: #ifdef __cplusplus
   22: extern "C" {
   23: #endif
   24: 
   25: 
   26: /* This can be enabled through the configure --enable-relocatable option.  */
   27: #if ENABLE_RELOCATABLE
   28: 
   29: /* When building a DLL, we must export some functions.  Note that because
   30:    this is a private .h file, we don't need to use __declspec(dllimport)
   31:    in any case.  */
   32: #if HAVE_VISIBILITY && BUILDING_DLL
   33: # define RELOCATABLE_DLL_EXPORTED __attribute__((__visibility__("default")))
   34: #elif defined _MSC_VER && BUILDING_DLL
   35: # define RELOCATABLE_DLL_EXPORTED __declspec(dllexport)
   36: #else
   37: # define RELOCATABLE_DLL_EXPORTED
   38: #endif
   39: 
   40: /* Sets the original and the current installation prefix of the package.
   41:    Relocation simply replaces a pathname starting with the original prefix
   42:    by the corresponding pathname with the current prefix instead.  Both
   43:    prefixes should be directory names without trailing slash (i.e. use ""
   44:    instead of "/").  */
   45: extern RELOCATABLE_DLL_EXPORTED void
   46:        set_relocation_prefix (const char *orig_prefix,
   47:                               const char *curr_prefix);
   48: 
   49: /* Returns the pathname, relocated according to the current installation
   50:    directory.
   51:    The returned string is either PATHNAME unmodified or a freshly allocated
   52:    string that you can free with free() after casting it to 'char *'.  */
   53: extern const char * relocate (const char *pathname);
   54: 
   55: /* Memory management: relocate() potentially allocates memory, because it has
   56:    to construct a fresh pathname.  If this is a problem because your program
   57:    calls relocate() frequently, think about caching the result.  Or free the
   58:    return value if it was different from the argument pathname.  */
   59: 
   60: /* Convenience function:
   61:    Computes the current installation prefix, based on the original
   62:    installation prefix, the original installation directory of a particular
   63:    file, and the current pathname of this file.
   64:    Returns it, freshly allocated.  Returns NULL upon failure.  */
   65: extern char * compute_curr_prefix (const char *orig_installprefix,
   66:                                    const char *orig_installdir,
   67:                                    const char *curr_pathname);
   68: 
   69: #else
   70: 
   71: /* By default, we use the hardwired pathnames.  */
   72: #define relocate(pathname) (pathname)
   73: 
   74: #endif
   75: 
   76: 
   77: #ifdef __cplusplus
   78: }
   79: #endif
   80: 
   81: #endif /* _RELOCATABLE_H */