pmt: revert 7f8090b
This commit is contained in:
@@ -1,124 +0,0 @@
|
||||
/* Provide relocatable packages.
|
||||
Copyright (C) 2003, 2005, 2008-2024 Free Software Foundation, Inc.
|
||||
Written by Bruno Haible <bruno@clisp.org>, 2003.
|
||||
|
||||
This file is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU Lesser General Public License as
|
||||
published by the Free Software Foundation; either version 2.1 of the
|
||||
License, or (at your option) any later version.
|
||||
|
||||
This file 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 Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public License
|
||||
along with this program. If not, see <https://www.gnu.org/licenses/>. */
|
||||
|
||||
#ifndef _RELOCATABLE_H
|
||||
#define _RELOCATABLE_H
|
||||
|
||||
/* This file uses _GL_ATTRIBUTE_MALLOC, HAVE_VISIBILITY. */
|
||||
#if !_GL_CONFIG_H_INCLUDED
|
||||
#error "Please include config.h first."
|
||||
#endif
|
||||
|
||||
#include <stdlib.h>
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
|
||||
/* This can be enabled through the configure --enable-relocatable option. */
|
||||
#if ENABLE_RELOCATABLE
|
||||
|
||||
/* When building a shared library, 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_SHLIB_EXPORTED __attribute__((__visibility__("default")))
|
||||
#elif defined _MSC_VER && BUILDING_DLL
|
||||
/* When building with MSVC, exporting a symbol means that the object file
|
||||
contains a "linker directive" of the form /EXPORT:symbol. This can be
|
||||
inspected through the "objdump -s --section=.drectve FILE" or
|
||||
"dumpbin /directives FILE" commands.
|
||||
The symbols from this file should be exported if and only if the object
|
||||
file gets included in a DLL. Libtool, on Windows platforms, defines
|
||||
the C macro DLL_EXPORT (together with PIC) when compiling for a shared
|
||||
library (called DLL under Windows) and does not define it when compiling
|
||||
an object file meant to be linked statically into some executable. */
|
||||
# if defined DLL_EXPORT
|
||||
# define RELOCATABLE_SHLIB_EXPORTED __declspec(dllexport)
|
||||
# else
|
||||
# define RELOCATABLE_SHLIB_EXPORTED
|
||||
# endif
|
||||
#else
|
||||
# define RELOCATABLE_SHLIB_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_SHLIB_EXPORTED void
|
||||
set_relocation_prefix (const char *orig_prefix,
|
||||
const char *curr_prefix);
|
||||
|
||||
/* Returns the pathname, relocated according to the current installation
|
||||
directory.
|
||||
The returned string is either PATHNAME unmodified or a freshly allocated
|
||||
string that you can free with free() after casting it to 'char *'. */
|
||||
extern const char * relocate (const char *pathname);
|
||||
|
||||
/* Returns the pathname, relocated according to the current installation
|
||||
directory.
|
||||
This function sets *ALLOCATEDP to the allocated memory, or to NULL if
|
||||
no memory allocation occurs. So that, after you're done with the return
|
||||
value, to reclaim allocated memory, you can do: free (*ALLOCATEDP). */
|
||||
extern const char * relocate2 (const char *pathname, char **allocatedp);
|
||||
|
||||
/* Memory management: relocate() potentially allocates memory, because it has
|
||||
to construct a fresh pathname. If this is a problem because your program
|
||||
calls relocate() frequently or because you want to fix all potential memory
|
||||
leaks anyway, you have three options:
|
||||
1) Use this idiom:
|
||||
const char *pathname = ...;
|
||||
const char *rel_pathname = relocate (pathname);
|
||||
...
|
||||
if (rel_pathname != pathname)
|
||||
free ((char *) rel_pathname);
|
||||
2) Use this idiom:
|
||||
char *allocated;
|
||||
const char *rel_pathname = relocate2 (..., &allocated);
|
||||
...
|
||||
free (allocated);
|
||||
3) 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 it, freshly allocated. Returns NULL upon failure. */
|
||||
extern char * compute_curr_prefix (const char *orig_installprefix,
|
||||
const char *orig_installdir,
|
||||
const char *curr_pathname)
|
||||
_GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE;
|
||||
|
||||
#else
|
||||
|
||||
/* By default, we use the hardwired pathnames. */
|
||||
#define set_relocation_prefix(orig_prefix, curr_prefix) \
|
||||
((void) (orig_prefix), (void) (curr_prefix))
|
||||
#define relocate(pathname) (pathname)
|
||||
#define relocate2(pathname,allocatedp) (*(allocatedp) = NULL, (pathname))
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* _RELOCATABLE_H */
|
||||
Reference in New Issue
Block a user