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/* Handling of dynamic sring tokens.
Copyright (C) 1999,2001,2002,2003,2004,2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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.
The GNU C Library 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 the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* Determine the number of DST elements in the name. Only if IS_PATH is
nonzero paths are recognized (i.e., multiple, ':' separated filenames). */
#define DL_DST_COUNT(name, is_path) \
({ \
size_t __cnt = 0; \
const char *__sf = strchr (name, '$'); \
\
if (__builtin_expect (__sf != NULL, 0)) \
__cnt = _dl_dst_count (__sf, is_path); \
\
__cnt; })
#ifndef IS_IN_rtld
# define _dl_dst_count GLRO(dl_dst_count)
#endif
/* Guess from the number of DSTs the length of the result string. */
#define DL_DST_REQUIRED(l, name, len, cnt) \
({ \
size_t __len = (len); \
size_t __cnt = (cnt); \
\
if (__cnt > 0) \
{ \
size_t origin_len; \
/* Now we make a guess how many extra characters on top of the \
length of S we need to represent the result. We know that \
we have CNT replacements. Each at most can use \
MAX (strlen (ORIGIN), strlen (_dl_platform)) \
minus 7 (which is the length of "$ORIGIN"). \
\
First get the origin string if it is not available yet. \
This can only happen for the map of the executable. */ \
DL_DST_REQ_STATIC \
if ((l)->l_origin == NULL) \
{ \
assert ((l)->l_name[0] == '\0'); \
(l)->l_origin = _dl_get_origin (); \
origin_len = ((l)->l_origin && (l)->l_origin != (char *) -1 \
? strlen ((l)->l_origin) : 0); \
} \
else \
origin_len = (l)->l_origin == (char *) -1 \
? 0 : strlen ((l)->l_origin); \
\
__len += __cnt * (MAX (origin_len, GLRO(dl_platformlen)) - 7); \
} \
\
__len; })
#ifdef SHARED
# define DL_DST_REQ_STATIC /* nothing */
#else
# define DL_DST_REQ_STATIC \
if ((l) == NULL) \
{ \
const char *origin = _dl_get_origin (); \
origin_len = (origin && origin != (char *) -1 ? strlen (origin) : 0); \
} \
else
#endif
#ifndef IS_IN_rtld
# define _dl_get_origin GLRO(dl_get_origin)
# define _dl_dst_substitute GLRO(dl_dst_substitute)
#endif
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