Index: bison/src/bison/2.4.1/bison-2.4.1/patches/bison-2.4.1-src/lib/relocatable.c |
=================================================================== |
--- bison/src/bison/2.4.1/bison-2.4.1/patches/bison-2.4.1-src/lib/relocatable.c (revision 0) |
+++ bison/src/bison/2.4.1/bison-2.4.1/patches/bison-2.4.1-src/lib/relocatable.c (revision 0) |
@@ -0,0 +1,493 @@ |
+/* Provide relocatable packages. |
+ Copyright (C) 2003-2006, 2008 Free Software Foundation, Inc. |
+ Written by Bruno Haible <bruno@clisp.org>, 2003. |
+ |
+ This program is free software; you can redistribute it and/or modify it |
+ under the terms of the GNU Library General Public License as published |
+ by the Free Software Foundation; either version 2, or (at your option) |
+ any later version. |
+ |
+ This program 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 |
+ Library General Public License for more details. |
+ |
+ You should have received a copy of the GNU Library General Public |
+ License along with this program; if not, write to the Free Software |
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
+ USA. */ |
+ |
+ |
+/* Tell glibc's <stdio.h> to provide a prototype for getline(). |
+ This must come before <config.h> because <config.h> may include |
+ <features.h>, and once <features.h> has been included, it's too late. */ |
+#ifndef _GNU_SOURCE |
+# define _GNU_SOURCE 1 |
+#endif |
+ |
+#include <config.h> |
+ |
+/* Specification. */ |
+#include "relocatable.h" |
+ |
+#if ENABLE_RELOCATABLE |
+ |
+#include <stddef.h> |
+#include <stdio.h> |
+#include <stdlib.h> |
+#include <string.h> |
+ |
+#ifdef NO_XMALLOC |
+# define xmalloc malloc |
+#else |
+# include "xalloc.h" |
+#endif |
+ |
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ |
+# define WIN32_LEAN_AND_MEAN |
+# include <windows.h> |
+#endif |
+ |
+#if DEPENDS_ON_LIBCHARSET |
+# include <libcharset.h> |
+#endif |
+#if DEPENDS_ON_LIBICONV && HAVE_ICONV |
+# include <iconv.h> |
+#endif |
+#if DEPENDS_ON_LIBINTL && ENABLE_NLS |
+# include <libintl.h> |
+#endif |
+ |
+/* Faked cheap 'bool'. */ |
+#undef bool |
+#undef false |
+#undef true |
+#define bool int |
+#define false 0 |
+#define true 1 |
+ |
+/* Pathname support. |
+ ISSLASH(C) tests whether C is a directory separator character. |
+ IS_PATH_WITH_DIR(P) tests whether P contains a directory specification. |
+ */ |
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__ |
+ /* Win32, Cygwin, OS/2, DOS */ |
+# define ISSLASH(C) ((C) == '/' || (C) == '\\') |
+# define HAS_DEVICE(P) \ |
+ ((((P)[0] >= 'A' && (P)[0] <= 'Z') || ((P)[0] >= 'a' && (P)[0] <= 'z')) \ |
+ && (P)[1] == ':') |
+# define IS_PATH_WITH_DIR(P) \ |
+ (strchr (P, '/') != NULL || strchr (P, '\\') != NULL || HAS_DEVICE (P)) |
+# define FILE_SYSTEM_PREFIX_LEN(P) (HAS_DEVICE (P) ? 2 : 0) |
+#else |
+ /* Unix */ |
+# define ISSLASH(C) ((C) == '/') |
+# define IS_PATH_WITH_DIR(P) (strchr (P, '/') != NULL) |
+# define FILE_SYSTEM_PREFIX_LEN(P) 0 |
+#endif |
+ |
+/* Original installation prefix. */ |
+static char *orig_prefix; |
+static size_t orig_prefix_len; |
+/* Current installation prefix. */ |
+static char *curr_prefix; |
+static size_t curr_prefix_len; |
+/* These prefixes do not end in a slash. Anything that will be concatenated |
+ to them must start with a slash. */ |
+ |
+/* Sets the original and the current installation prefix of this module. |
+ 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 "/"). */ |
+static void |
+set_this_relocation_prefix (const char *orig_prefix_arg, |
+ const char *curr_prefix_arg) |
+{ |
+ if (orig_prefix_arg != NULL && curr_prefix_arg != NULL |
+ /* Optimization: if orig_prefix and curr_prefix are equal, the |
+ relocation is a nop. */ |
+ && strcmp (orig_prefix_arg, curr_prefix_arg) != 0) |
+ { |
+ /* Duplicate the argument strings. */ |
+ char *memory; |
+ |
+ orig_prefix_len = strlen (orig_prefix_arg); |
+ curr_prefix_len = strlen (curr_prefix_arg); |
+ memory = (char *) xmalloc (orig_prefix_len + 1 + curr_prefix_len + 1); |
+#ifdef NO_XMALLOC |
+ if (memory != NULL) |
+#endif |
+ { |
+ memcpy (memory, orig_prefix_arg, orig_prefix_len + 1); |
+ orig_prefix = memory; |
+ memory += orig_prefix_len + 1; |
+ memcpy (memory, curr_prefix_arg, curr_prefix_len + 1); |
+ curr_prefix = memory; |
+ return; |
+ } |
+ } |
+ orig_prefix = NULL; |
+ curr_prefix = NULL; |
+ /* Don't worry about wasted memory here - this function is usually only |
+ called once. */ |
+} |
+ |
+/* 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 "/"). */ |
+void |
+set_relocation_prefix (const char *orig_prefix_arg, const char *curr_prefix_arg) |
+{ |
+ set_this_relocation_prefix (orig_prefix_arg, curr_prefix_arg); |
+ |
+ /* Now notify all dependent libraries. */ |
+#if DEPENDS_ON_LIBCHARSET |
+ libcharset_set_relocation_prefix (orig_prefix_arg, curr_prefix_arg); |
+#endif |
+#if DEPENDS_ON_LIBICONV && HAVE_ICONV && _LIBICONV_VERSION >= 0x0109 |
+ libiconv_set_relocation_prefix (orig_prefix_arg, curr_prefix_arg); |
+#endif |
+#if DEPENDS_ON_LIBINTL && ENABLE_NLS && defined libintl_set_relocation_prefix |
+ libintl_set_relocation_prefix (orig_prefix_arg, curr_prefix_arg); |
+#endif |
+} |
+ |
+#if !defined IN_LIBRARY || (defined PIC && defined INSTALLDIR) |
+ |
+/* 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. */ |
+#ifdef IN_LIBRARY |
+#define compute_curr_prefix local_compute_curr_prefix |
+static |
+#endif |
+char * |
+compute_curr_prefix (const char *orig_installprefix, |
+ const char *orig_installdir, |
+ const char *curr_pathname) |
+{ |
+ char *curr_installdir; |
+ const char *rel_installdir; |
+ |
+ if (curr_pathname == NULL) |
+ return NULL; |
+ |
+ /* Determine the relative installation directory, relative to the prefix. |
+ This is simply the difference between orig_installprefix and |
+ orig_installdir. */ |
+ if (strncmp (orig_installprefix, orig_installdir, strlen (orig_installprefix)) |
+ != 0) |
+ /* Shouldn't happen - nothing should be installed outside $(prefix). */ |
+ return NULL; |
+ rel_installdir = orig_installdir + strlen (orig_installprefix); |
+ |
+ /* Determine the current installation directory. */ |
+ { |
+ const char *p_base = curr_pathname + FILE_SYSTEM_PREFIX_LEN (curr_pathname); |
+ const char *p = curr_pathname + strlen (curr_pathname); |
+ char *q; |
+ |
+ while (p > p_base) |
+ { |
+ p--; |
+ if (ISSLASH (*p)) |
+ break; |
+ } |
+ |
+ q = (char *) xmalloc (p - curr_pathname + 1); |
+#ifdef NO_XMALLOC |
+ if (q == NULL) |
+ return NULL; |
+#endif |
+ memcpy (q, curr_pathname, p - curr_pathname); |
+ q[p - curr_pathname] = '\0'; |
+ curr_installdir = q; |
+ } |
+ |
+ /* Compute the current installation prefix by removing the trailing |
+ rel_installdir from it. */ |
+ { |
+ const char *rp = rel_installdir + strlen (rel_installdir); |
+ const char *cp = curr_installdir + strlen (curr_installdir); |
+ const char *cp_base = |
+ curr_installdir + FILE_SYSTEM_PREFIX_LEN (curr_installdir); |
+ |
+ while (rp > rel_installdir && cp > cp_base) |
+ { |
+ bool same = false; |
+ const char *rpi = rp; |
+ const char *cpi = cp; |
+ |
+ while (rpi > rel_installdir && cpi > cp_base) |
+ { |
+ rpi--; |
+ cpi--; |
+ if (ISSLASH (*rpi) || ISSLASH (*cpi)) |
+ { |
+ if (ISSLASH (*rpi) && ISSLASH (*cpi)) |
+ same = true; |
+ break; |
+ } |
+ /* Do case-insensitive comparison if the filesystem is always or |
+ often case-insensitive. It's better to accept the comparison |
+ if the difference is only in case, rather than to fail. */ |
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__ |
+ /* Win32, Cygwin, OS/2, DOS - case insignificant filesystem */ |
+ if ((*rpi >= 'a' && *rpi <= 'z' ? *rpi - 'a' + 'A' : *rpi) |
+ != (*cpi >= 'a' && *cpi <= 'z' ? *cpi - 'a' + 'A' : *cpi)) |
+ break; |
+#else |
+ if (*rpi != *cpi) |
+ break; |
+#endif |
+ } |
+ if (!same) |
+ break; |
+ /* The last pathname component was the same. opi and cpi now point |
+ to the slash before it. */ |
+ rp = rpi; |
+ cp = cpi; |
+ } |
+ |
+ if (rp > rel_installdir) |
+ { |
+ /* Unexpected: The curr_installdir does not end with rel_installdir. */ |
+ free (curr_installdir); |
+ return NULL; |
+ } |
+ |
+ { |
+ size_t curr_prefix_len = cp - curr_installdir; |
+ char *curr_prefix; |
+ |
+ curr_prefix = (char *) xmalloc (curr_prefix_len + 1); |
+#ifdef NO_XMALLOC |
+ if (curr_prefix == NULL) |
+ { |
+ free (curr_installdir); |
+ return NULL; |
+ } |
+#endif |
+ memcpy (curr_prefix, curr_installdir, curr_prefix_len); |
+ curr_prefix[curr_prefix_len] = '\0'; |
+ |
+ free (curr_installdir); |
+ |
+ return curr_prefix; |
+ } |
+ } |
+} |
+ |
+#endif /* !IN_LIBRARY || PIC */ |
+ |
+#if defined PIC && defined INSTALLDIR |
+ |
+/* Full pathname of shared library, or NULL. */ |
+static char *shared_library_fullname; |
+ |
+#if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ |
+ |
+/* Determine the full pathname of the shared library when it is loaded. */ |
+ |
+BOOL WINAPI |
+DllMain (HINSTANCE module_handle, DWORD event, LPVOID reserved) |
+{ |
+ (void) reserved; |
+ |
+ if (event == DLL_PROCESS_ATTACH) |
+ { |
+ /* The DLL is being loaded into an application's address range. */ |
+ static char location[MAX_PATH]; |
+ |
+ if (!GetModuleFileName (module_handle, location, sizeof (location))) |
+ /* Shouldn't happen. */ |
+ return FALSE; |
+ |
+ if (!IS_PATH_WITH_DIR (location)) |
+ /* Shouldn't happen. */ |
+ return FALSE; |
+ |
+ { |
+#if defined __CYGWIN__ |
+ /* On Cygwin, we need to convert paths coming from Win32 system calls |
+ to the Unix-like slashified notation. */ |
+ static char location_as_posix_path[2 * MAX_PATH]; |
+ /* There's no error return defined for cygwin_conv_to_posix_path. |
+ See cygwin-api/func-cygwin-conv-to-posix-path.html. |
+ Does it overflow the buffer of expected size MAX_PATH or does it |
+ truncate the path? I don't know. Let's catch both. */ |
+ cygwin_conv_to_posix_path (location, location_as_posix_path); |
+ location_as_posix_path[MAX_PATH - 1] = '\0'; |
+ if (strlen (location_as_posix_path) >= MAX_PATH - 1) |
+ /* A sign of buffer overflow or path truncation. */ |
+ return FALSE; |
+ shared_library_fullname = strdup (location_as_posix_path); |
+#else |
+ shared_library_fullname = strdup (location); |
+#endif |
+ } |
+ } |
+ |
+ return TRUE; |
+} |
+ |
+#else /* Unix except Cygwin */ |
+ |
+static void |
+find_shared_library_fullname () |
+{ |
+#if defined __linux__ && __GLIBC__ >= 2 |
+ /* Linux has /proc/self/maps. glibc 2 has the getline() function. */ |
+ FILE *fp; |
+ |
+ /* Open the current process' maps file. It describes one VMA per line. */ |
+ fp = fopen ("/proc/self/maps", "r"); |
+ if (fp) |
+ { |
+ unsigned long address = (unsigned long) &find_shared_library_fullname; |
+ for (;;) |
+ { |
+ unsigned long start, end; |
+ int c; |
+ |
+ if (fscanf (fp, "%lx-%lx", &start, &end) != 2) |
+ break; |
+ if (address >= start && address <= end - 1) |
+ { |
+ /* Found it. Now see if this line contains a filename. */ |
+ while (c = getc (fp), c != EOF && c != '\n' && c != '/') |
+ continue; |
+ if (c == '/') |
+ { |
+ size_t size; |
+ int len; |
+ |
+ ungetc (c, fp); |
+ shared_library_fullname = NULL; size = 0; |
+ len = getline (&shared_library_fullname, &size, fp); |
+ if (len >= 0) |
+ { |
+ /* Success: filled shared_library_fullname. */ |
+ if (len > 0 && shared_library_fullname[len - 1] == '\n') |
+ shared_library_fullname[len - 1] = '\0'; |
+ } |
+ } |
+ break; |
+ } |
+ while (c = getc (fp), c != EOF && c != '\n') |
+ continue; |
+ } |
+ fclose (fp); |
+ } |
+#endif |
+} |
+ |
+#endif /* (WIN32 or Cygwin) / (Unix except Cygwin) */ |
+ |
+/* Return the full pathname of the current shared library. |
+ Return NULL if unknown. |
+ Guaranteed to work only on Linux, Cygwin and Woe32. */ |
+static char * |
+get_shared_library_fullname () |
+{ |
+#if !(defined _WIN32 || defined __WIN32__ || defined __CYGWIN__) |
+ static bool tried_find_shared_library_fullname; |
+ if (!tried_find_shared_library_fullname) |
+ { |
+ find_shared_library_fullname (); |
+ tried_find_shared_library_fullname = true; |
+ } |
+#endif |
+ return shared_library_fullname; |
+} |
+ |
+#endif /* PIC */ |
+ |
+/* 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 *'. */ |
+const char * |
+relocate (const char *pathname) |
+{ |
+#if defined PIC && defined INSTALLDIR |
+ static int initialized; |
+ |
+ /* Initialization code for a shared library. */ |
+ if (!initialized) |
+ { |
+ /* At this point, orig_prefix and curr_prefix likely have already been |
+ set through the main program's set_program_name_and_installdir |
+ function. This is sufficient in the case that the library has |
+ initially been installed in the same orig_prefix. But we can do |
+ better, to also cover the cases that 1. it has been installed |
+ in a different prefix before being moved to orig_prefix and (later) |
+ to curr_prefix, 2. unlike the program, it has not moved away from |
+ orig_prefix. */ |
+ const char *orig_installprefix = INSTALLPREFIX; |
+ const char *orig_installdir = INSTALLDIR; |
+ char *curr_prefix_better; |
+ |
+ curr_prefix_better = |
+ compute_curr_prefix (orig_installprefix, orig_installdir, |
+ get_shared_library_fullname ()); |
+ |
+ set_relocation_prefix (orig_installprefix, |
+ curr_prefix_better != NULL |
+ ? curr_prefix_better |
+ : curr_prefix); |
+ |
+ if (curr_prefix_better != NULL) |
+ free (curr_prefix_better); |
+ |
+ initialized = 1; |
+ } |
+#endif |
+ |
+ /* Note: It is not necessary to perform case insensitive comparison here, |
+ even for DOS-like filesystems, because the pathname argument was |
+ typically created from the same Makefile variable as orig_prefix came |
+ from. */ |
+ if (orig_prefix != NULL && curr_prefix != NULL |
+ && strncmp (pathname, orig_prefix, orig_prefix_len) == 0) |
+ { |
+ if (pathname[orig_prefix_len] == '\0') |
+ { |
+ /* pathname equals orig_prefix. */ |
+ char *result = (char *) xmalloc (strlen (curr_prefix) + 1); |
+ |
+#ifdef NO_XMALLOC |
+ if (result != NULL) |
+#endif |
+ { |
+ strcpy (result, curr_prefix); |
+ return result; |
+ } |
+ } |
+ else if (ISSLASH (pathname[orig_prefix_len])) |
+ { |
+ /* pathname starts with orig_prefix. */ |
+ const char *pathname_tail = &pathname[orig_prefix_len]; |
+ char *result = |
+ (char *) xmalloc (curr_prefix_len + strlen (pathname_tail) + 1); |
+ |
+#ifdef NO_XMALLOC |
+ if (result != NULL) |
+#endif |
+ { |
+ memcpy (result, curr_prefix, curr_prefix_len); |
+ strcpy (result + curr_prefix_len, pathname_tail); |
+ return result; |
+ } |
+ } |
+ } |
+ /* Nothing to relocate. */ |
+ return pathname; |
+} |
+ |
+#endif |
Property changes on: bison\src\bison\2.4.1\bison-2.4.1\patches\bison-2.4.1-src\lib\relocatable.c |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |