projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| dc5efe83 | 1 | /* Handling of dynamic sring tokens. |
| d6b5d570 | 2 | Copyright (C) 1999, 2001, 2002 Free Software Foundation, Inc. |
| dc5efe83 UD |
3 | This file is part of the GNU C Library. |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| dc5efe83 UD |
9 | |
| 10 | The GNU C Library 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 | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| dc5efe83 | 14 | |
| 41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| dc5efe83 UD |
19 | |
| 20 | /* Determine the number of DST elements in the name. Only if IS_PATH is | |
| 21 | nonzero paths are recognized (i.e., multiple, ':' separated filenames). */ | |
| 22 | #define DL_DST_COUNT(name, is_path) \ | |
| 23 | ({ \ | |
| 24 | size_t __cnt = 0; \ | |
| 25 | const char *__sf = strchr (name, '$'); \ | |
| 26 | \ | |
| 2541eda0 | 27 | if (__builtin_expect (__sf != NULL, 0)) \ |
| dc5efe83 UD |
28 | __cnt = _dl_dst_count (__sf, is_path); \ |
| 29 | \ | |
| 30 | __cnt; }) | |
| 31 | ||
| 32 | /* Prototype for used function. */ | |
| 33 | extern size_t _dl_dst_count (const char *name, int is_path); | |
| 34 | ||
| 35 | ||
| b3fc5f84 | 36 | /* Guess from the number of DSTs the length of the result string. */ |
| dc5efe83 UD |
37 | #define DL_DST_REQUIRED(l, name, len, cnt) \ |
| 38 | ({ \ | |
| 39 | size_t origin_len; \ | |
| 40 | size_t __len = (len); \ | |
| 41 | \ | |
| 42 | /* Now we make a guess how many extra characters on top of the length \ | |
| 43 | of S we need to represent the result. We know that we have CNT \ | |
| 44 | replacements. Each at most can use \ | |
| 45 | MAX (strlen (ORIGIN), strlen (_dl_platform)) \ | |
| 46 | minus 7 (which is the length of "$ORIGIN"). \ | |
| 47 | \ | |
| 48 | First get the origin string if it is not available yet. This can \ | |
| 49 | only happen for the map of the executable. */ \ | |
| 50 | if ((l)->l_origin == NULL) \ | |
| 51 | { \ | |
| 52 | assert ((l)->l_name[0] == '\0'); \ | |
| 53 | (l)->l_origin = _dl_get_origin (); \ | |
| 54 | origin_len = ((l)->l_origin && (l)->l_origin != (char *) -1 \ | |
| 55 | ? strlen ((l)->l_origin) : 0); \ | |
| 56 | } \ | |
| 57 | else \ | |
| 58 | origin_len = (l)->l_origin == (char *) -1 ? 0 : strlen ((l)->l_origin); \ | |
| 59 | \ | |
| d6b5d570 | 60 | __len + cnt * (MAX (origin_len, GL(dl_platformlen)) - 7); }) |
| dc5efe83 UD |
61 | |
| 62 | /* Find origin of the executable. */ | |
| 63 | extern const char *_dl_get_origin (void); | |
| 64 | ||
| 65 | ||
| 66 | /* Perform the DST substitution. */ | |
| 67 | #define DL_DST_SUBSTITUTE(l, name, res, is_path) \ | |
| 68 | _dl_dst_substitute (l, name, res, is_path) | |
| 69 | ||
| 70 | /* Prototype for used function. */ | |
| 71 | extern char *_dl_dst_substitute (struct link_map *l, const char *name, | |
| 72 | char *result, int is_path); |