1 /* 2 * BinReloc - a library for creating relocatable executables 3 * Written by: Mike Hearn <mike@theoretic.com> 4 * Hongli Lai <h.lai@chello.nl> 5 * http://autopackage.org/ 6 * 7 * This source code is public domain. You can relicense this code 8 * under whatever license you want. 9 * 10 * See http://autopackage.org/docs/binreloc/ for 11 * more information and how to use this. 12 * 13 * NOTE: if you're using C++ and are getting "undefined reference 14 * to br_*", try renaming prefix.c to prefix.cpp 15 */ 16 17 #ifndef _PREFIX_H_ 18 #define _PREFIX_H_ 19 20 #ifdef __cplusplus 21 extern "C" { 22 #endif /* __cplusplus */ 23 24 /* WARNING, BEFORE YOU MODIFY PREFIX.C: 25 * 26 * If you make changes to any of the functions in prefix.c, you MUST 27 * change the BR_NAMESPACE macro. 28 * This way you can avoid symbol table conflicts with other libraries 29 * that also happen to use BinReloc. 30 * 31 * Example: 32 * #define BR_NAMESPACE(funcName) foobar_ ## funcName 33 * --> expands br_locate to foobar_br_locate 34 */ 35 #undef BR_NAMESPACE 36 #define BR_NAMESPACE(funcName) funcName 37 38 39 #ifdef ENABLE_BINRELOC 40 41 #define br_thread_local_store BR_NAMESPACE(br_thread_local_store) 42 #define br_locate BR_NAMESPACE(br_locate) 43 #define br_locate_prefix BR_NAMESPACE(br_locate_prefix) 44 #define br_prepend_prefix BR_NAMESPACE(br_prepend_prefix) 45 46 #ifndef BR_NO_MACROS 47 /* These are convience macros that replace the ones usually used 48 in Autoconf/Automake projects */ 49 #undef SELFPATH 50 #undef PREFIX 51 #undef PREFIXDIR 52 #undef BINDIR 53 #undef SBINDIR 54 #undef DATADIR 55 #undef LIBDIR 56 #undef LIBEXECDIR 57 #undef ETCDIR 58 #undef SYSCONFDIR 59 #undef CONFDIR 60 #undef LOCALEDIR 61 62 #define SELFPATH (br_thread_local_store (br_locate ((void *) ""))) 63 #define PREFIX (br_thread_local_store (br_locate_prefix ((void *) ""))) 64 #define PREFIXDIR (br_thread_local_store (br_locate_prefix ((void *) ""))) 65 #define BINDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/bin"))) 66 #define SBINDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/sbin"))) 67 #define DATADIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/share"))) 68 #define LIBDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/lib"))) 69 #define LIBEXECDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/libexec"))) 70 #define ETCDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/etc"))) 71 #define SYSCONFDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/etc"))) 72 #define CONFDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/etc"))) 73 #define LOCALEDIR (br_thread_local_store (br_prepend_prefix ((void *) "", "/share/locale"))) 74 #endif /* BR_NO_MACROS */ 75 76 77 /* The following functions are used internally by BinReloc 78 and shouldn't be used directly in applications. */ 79 80 const char *br_thread_local_store (char *str); 81 char *br_locate (void *symbol); 82 char *br_locate_prefix (void *symbol); 83 char *br_prepend_prefix (void *symbol, char *path); 84 85 86 #endif /* ENABLE_BINRELOC */ 87 88 89 /* These macros and functions are not guarded by the ENABLE_BINRELOC 90 * macro because they are portable. You can use these functions. 91 */ 92 93 #define br_strcat BR_NAMESPACE(br_strcat) 94 #define br_extract_dir BR_NAMESPACE(br_extract_dir) 95 #define br_extract_prefix BR_NAMESPACE(br_extract_prefix) 96 97 #ifndef BR_NO_MACROS 98 /* Convenience functions for concatenating paths */ 99 #define BR_SELFPATH(suffix) (br_thread_local_store (br_strcat (SELFPATH, suffix))) 100 #define BR_PREFIX(suffix) (br_thread_local_store (br_strcat (PREFIX, suffix))) 101 #define BR_PREFIXDIR(suffix) (br_thread_local_store (br_strcat (BR_PREFIX, suffix))) 102 #define BR_BINDIR(suffix) (br_thread_local_store (br_strcat (BINDIR, suffix))) 103 #define BR_SBINDIR(suffix) (br_thread_local_store (br_strcat (SBINDIR, suffix))) 104 #define BR_DATADIR(suffix) (br_thread_local_store (br_strcat (DATADIR, suffix))) 105 #define BR_LIBDIR(suffix) (br_thread_local_store (br_strcat (LIBDIR, suffix))) 106 #define BR_LIBEXECDIR(suffix) (br_thread_local_store (br_strcat (LIBEXECDIR, suffix))) 107 #define BR_ETCDIR(suffix) (br_thread_local_store (br_strcat (ETCDIR, suffix))) 108 #define BR_SYSCONFDIR(suffix) (br_thread_local_store (br_strcat (SYSCONFDIR, suffix))) 109 #define BR_CONFDIR(suffix) (br_thread_local_store (br_strcat (CONFDIR, suffix))) 110 #define BR_LOCALEDIR(suffix) (br_thread_local_store (br_strcat (LOCALEDIR, suffix))) 111 #endif 112 113 char *br_strcat (const char *str1, const char *str2); 114 char *br_extract_dir (const char *path); 115 char *br_extract_prefix(const char *path); 116 117 118 #ifdef __cplusplus 119 } 120 #endif /* __cplusplus */ 121 122 #endif /* _PREFIX_H_ */ 123