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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 it
    6:    under the terms of the GNU Library General Public License as published
    7:    by the Free Software Foundation; either version 2, or (at your option)
    8:    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 GNU
   13:    Library General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU Library General Public
   16:    License along with this program; if not, write to the Free Software
   17:    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
   18:    USA.  */
   19: 
   20: #ifndef _RELOCATABLE_H
   21: #define _RELOCATABLE_H
   22: 
   23: #ifdef __cplusplus
   24: extern "C" {
   25: #endif
   26: 
   27: 
   28: /* This can be enabled through the configure --enable-relocatable option.  */
   29: #if ENABLE_RELOCATABLE
   30: 
   31: /* When building a DLL, we must export some functions.  Note that because
   32:    this is a private .h file, we don't need to use __declspec(dllimport)
   33:    in any case.  */
   34: #if HAVE_VISIBILITY && BUILDING_DLL
   35: # define RELOCATABLE_DLL_EXPORTED __attribute__((__visibility__("default")))
   36: #elif defined _MSC_VER && BUILDING_DLL
   37: # define RELOCATABLE_DLL_EXPORTED __declspec(dllexport)
   38: #else
   39: # define RELOCATABLE_DLL_EXPORTED
   40: #endif
   41: 
   42: /* Sets the original and the current installation prefix of the package.
   43:    Relocation simply replaces a pathname starting with the original prefix
   44:    by the corresponding pathname with the current prefix instead.  Both
   45:    prefixes should be directory names without trailing slash (i.e. use ""
   46:    instead of "/").  */
   47: extern RELOCATABLE_DLL_EXPORTED void
   48:        set_relocation_prefix (const char *orig_prefix,
   49:                               const char *curr_prefix);
   50: 
   51: /* Returns the pathname, relocated according to the current installation
   52:    directory.
   53:    The returned string is either PATHNAME unmodified or a freshly allocated
   54:    string that you can free with free() after casting it to 'char *'.  */
   55: extern const char * relocate (const char *pathname);
   56: 
   57: /* Memory management: relocate() potentially allocates memory, because it has
   58:    to construct a fresh pathname.  If this is a problem because your program
   59:    calls relocate() frequently, think about caching the result.  Or free the
   60:    return value if it was different from the argument pathname.  */
   61: 
   62: /* Convenience function:
   63:    Computes the current installation prefix, based on the original
   64:    installation prefix, the original installation directory of a particular
   65:    file, and the current pathname of this file.
   66:    Returns it, freshly allocated.  Returns NULL upon failure.  */
   67: extern char * compute_curr_prefix (const char *orig_installprefix,
   68:                                    const char *orig_installdir,
   69:                                    const char *curr_pathname);
   70: 
   71: #else
   72: 
   73: /* By default, we use the hardwired pathnames.  */
   74: #define relocate(pathname) (pathname)
   75: 
   76: #endif
   77: 
   78: 
   79: #ifdef __cplusplus
   80: }
   81: #endif
   82: 
   83: #endif /* _RELOCATABLE_H */