/* Utility to update paths from internal to external forms.
- Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC 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 of the License, or (at your option) any later version.
+GCC 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 of the License, or (at
+your option) any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
You should have received a copy of the GNU Library General Public
License along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
/* This file contains routines to update a path, both to canonicalize
the directory format and to handle any prefix translation.
be considered a "key" and looked up as follows:
-- If this is a Win32 OS, then the Registry will be examined for
- an entry of "key" in
+ an entry of "key" in
- HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\
+ HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\<KEY>
- if found, that value will be used.
+ if found, that value will be used. <KEY> defaults to GCC version
+ string, but can be overridden at configuration time.
-- If not found (or not a Win32 OS), the environment variable
key_ROOT (the value of "key" concatenated with the constant "_ROOT")
as an environment variable, whose value will be returned.
Once all this is done, any '/' will be converted to DIR_SEPARATOR,
- if they are different.
+ if they are different.
NOTE: using resolve_keyed_path under Win32 requires linking with
advapi32.dll. */
#include "config.h"
#include "system.h"
-#ifdef _WIN32
+#include "coretypes.h"
+#include "tm.h"
+#if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY)
#include <windows.h>
#endif
+#include "prefix.h"
-static char *std_prefix = PREFIX;
+static const char *std_prefix = PREFIX;
-static char *get_key_value PROTO((char *));
-static char *translate_name PROTO((char *));
-static char *concat PVPROTO((char *, ...));
-static char *save_string PROTO((char *, int));
+static const char *get_key_value (char *);
+static char *translate_name (char *);
+static char *save_string (const char *, int);
+static void tr (char *, int, int);
-#ifdef _WIN32
-static char *lookup_key PROTO((char *));
+#if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY)
+static char *lookup_key (char *);
static HKEY reg_key = (HKEY) INVALID_HANDLE_VALUE;
#endif
/* Given KEY, as above, return its value. */
-static char *
-get_key_value (key)
- char *key;
+static const char *
+get_key_value (char *key)
{
- char *prefix = 0;
+ const char *prefix = 0;
char *temp = 0;
-#ifdef _WIN32
+#if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY)
prefix = lookup_key (key);
#endif
if (prefix == 0)
- prefix = getenv (temp = concat (key, "_ROOT", NULL_PTR));
+ prefix = getenv (temp = concat (key, "_ROOT", NULL));
if (prefix == 0)
prefix = std_prefix;
return prefix;
}
-/* Concatenate a sequence of strings, returning the result.
-
- This function is based on the one in libiberty. */
-
-static char *
-concat VPROTO((char *first, ...))
-{
- register int length;
- register char *newstr;
- register char *end;
- register char *arg;
- va_list args;
-#ifndef __STDC__
- char *first;
-#endif
-
- /* First compute the size of the result and get sufficient memory. */
-
- VA_START (args, first);
-#ifndef __STDC__
- first = va_arg (args, char *);
-#endif
-
- arg = first;
- length = 0;
-
- while (arg != 0)
- {
- length += strlen (arg);
- arg = va_arg (args, char *);
- }
-
- newstr = (char *) malloc (length + 1);
- va_end (args);
-
- /* Now copy the individual pieces to the result string. */
-
- VA_START (args, first);
-#ifndef __STDC__
- first = va_arg (args, char *);
-#endif
-
- end = newstr;
- arg = first;
- while (arg != 0)
- {
- while (*arg)
- *end++ = *arg++;
- arg = va_arg (args, char *);
- }
- *end = '\000';
- va_end (args);
-
- return (newstr);
-}
-
/* Return a copy of a string that has been placed in the heap. */
static char *
-save_string (s, len)
- char *s;
- int len;
+save_string (const char *s, int len)
{
- register char *result = (char *) malloc (len + 1);
+ char *result = XNEWVEC (char, len + 1);
- bcopy (s, result, len);
+ memcpy (result, s, len);
result[len] = 0;
return result;
}
-#ifdef _WIN32
+#if defined(_WIN32) && defined(ENABLE_WIN32_REGISTRY)
+
+#ifndef WIN32_REGISTRY_KEY
+# define WIN32_REGISTRY_KEY BASEVER
+#endif
/* Look up "key" in the registry, as above. */
static char *
-lookup_key (key)
- char *key;
+lookup_key (char *key)
{
char *dst;
DWORD size;
res = RegOpenKeyExA (reg_key, "Free Software Foundation", 0,
KEY_READ, ®_key);
+ if (res == ERROR_SUCCESS)
+ res = RegOpenKeyExA (reg_key, WIN32_REGISTRY_KEY, 0,
+ KEY_READ, ®_key);
+
if (res != ERROR_SUCCESS)
- {
- reg_key = (HKEY) INVALID_HANDLE_VALUE;
- return 0;
- }
+ {
+ reg_key = (HKEY) INVALID_HANDLE_VALUE;
+ return 0;
+ }
}
size = 32;
- dst = (char *) malloc (size);
+ dst = xmalloc (size);
- res = RegQueryValueExA (reg_key, key, 0, &type, dst, &size);
+ res = RegQueryValueExA (reg_key, key, 0, &type, (LPBYTE) dst, &size);
if (res == ERROR_MORE_DATA && type == REG_SZ)
{
- dst = (char *) realloc (dst, size);
- res = RegQueryValueExA (reg_key, key, 0, &type, dst, &size);
+ dst = xrealloc (dst, size);
+ res = RegQueryValueExA (reg_key, key, 0, &type, (LPBYTE) dst, &size);
}
if (type != REG_SZ || res != ERROR_SUCCESS)
}
#endif
-/* If NAME starts with a '@' or '$', apply the translation rules above
- and return a new name. Otherwise, return the given name. */
+/* If NAME, a malloc-ed string, starts with a '@' or '$', apply the
+ translation rules above and return a newly malloc-ed name.
+ Otherwise, return the given name. */
static char *
-translate_name (name)
- char *name;
+translate_name (char *name)
{
- char code = name[0];
- char *key, *prefix = 0;
+ char code;
+ char *key, *old_name;
+ const char *prefix;
int keylen;
- if (code != '@' && code != '$')
- return name;
-
- for (keylen = 0;
- (name[keylen + 1] != 0 && name[keylen + 1] != '/'
-#ifdef DIR_SEPARATOR
- && name[keylen + 1] != DIR_SEPARATOR
-#endif
- );
- keylen++)
- ;
+ for (;;)
+ {
+ code = name[0];
+ if (code != '@' && code != '$')
+ break;
+
+ for (keylen = 0;
+ (name[keylen + 1] != 0 && !IS_DIR_SEPARATOR (name[keylen + 1]));
+ keylen++)
+ ;
+
+ key = (char *) alloca (keylen + 1);
+ strncpy (key, &name[1], keylen);
+ key[keylen] = 0;
+
+ if (code == '@')
+ {
+ prefix = get_key_value (key);
+ if (prefix == 0)
+ prefix = std_prefix;
+ }
+ else
+ prefix = getenv (key);
- key = (char *) alloca (keylen + 1);
- strncpy (key, &name[1], keylen);
- key[keylen] = 0;
+ if (prefix == 0)
+ prefix = PREFIX;
- name = &name[keylen + 1];
+ /* We used to strip trailing DIR_SEPARATORs here, but that can
+ sometimes yield a result with no separator when one was coded
+ and intended by the user, causing two path components to run
+ together. */
- if (code == '@')
- {
- prefix = get_key_value (key);
- if (prefix == 0)
- prefix = std_prefix;
+ old_name = name;
+ name = concat (prefix, &name[keylen + 1], NULL);
+ free (old_name);
}
- else
- prefix = getenv (key);
- if (prefix == 0)
- prefix = PREFIX;
+ return name;
+}
- /* Remove any trailing directory separator from what we got. */
- if (prefix[strlen (prefix) - 1] == '/'
-#ifdef DIR_SEPARATOR
- || prefix[strlen (prefix) - 1] == DIR_SEPARATOR
-#endif
- )
+/* In a NUL-terminated STRING, replace character C1 with C2 in-place. */
+static void
+tr (char *string, int c1, int c2)
+{
+ do
{
- prefix = save_string (prefix, strlen (prefix));
- prefix[strlen (prefix) - 1] = 0;
+ if (*string == c1)
+ *string = c2;
}
-
- return concat (prefix, name, NULL_PTR);
+ while (*string++);
}
-/* Update PATH using KEY if PATH starts with PREFIX. */
+/* Update PATH using KEY if PATH starts with PREFIX as a directory.
+ The returned string is always malloc-ed, and the caller is
+ responsible for freeing it. */
char *
-update_path (path, key)
- char *path;
- char *key;
+update_path (const char *path, const char *key)
{
- if (! strncmp (path, std_prefix, strlen (std_prefix)) && key != 0)
+ char *result, *p;
+ const int len = strlen (std_prefix);
+
+ if (! strncmp (path, std_prefix, len)
+ && (IS_DIR_SEPARATOR(path[len])
+ || path[len] == '\0')
+ && key != 0)
{
+ bool free_key = false;
+
if (key[0] != '$')
- key = concat ("@", key, NULL_PTR);
+ {
+ key = concat ("@", key, NULL);
+ free_key = true;
+ }
+
+ result = concat (key, &path[len], NULL);
+ if (free_key)
+ free ((char *) key);
+ result = translate_name (result);
+ }
+ else
+ result = xstrdup (path);
- path = concat (key, &path[strlen (std_prefix)], NULL_PTR);
+#ifndef ALWAYS_STRIP_DOTDOT
+#define ALWAYS_STRIP_DOTDOT 0
+#endif
- while (path[0] == '@' || path[0] == '$')
- path = translate_name (path);
- }
-
-#ifdef DIR_SEPARATOR
- if (DIR_SEPARATOR != '/')
+ p = result;
+ while (1)
{
- int i;
- int len = strlen (path);
-
- path = save_string (path, len);
- for (i = 0; i < len; i++)
- if (path[i] == '/')
- path[i] = DIR_SEPARATOR;
+ char *src, *dest;
+
+ p = strchr (p, '.');
+ if (p == NULL)
+ break;
+ /* Look for `/../' */
+ if (p[1] == '.'
+ && IS_DIR_SEPARATOR (p[2])
+ && (p != result && IS_DIR_SEPARATOR (p[-1])))
+ {
+ *p = 0;
+ if (!ALWAYS_STRIP_DOTDOT && access (result, X_OK) == 0)
+ {
+ *p = '.';
+ break;
+ }
+ else
+ {
+ /* We can't access the dir, so we won't be able to
+ access dir/.. either. Strip out `dir/../'. If `dir'
+ turns out to be `.', strip one more path component. */
+ dest = p;
+ do
+ {
+ --dest;
+ while (dest != result && IS_DIR_SEPARATOR (*dest))
+ --dest;
+ while (dest != result && !IS_DIR_SEPARATOR (dest[-1]))
+ --dest;
+ }
+ while (dest != result && *dest == '.');
+ /* If we have something like `./..' or `/..', don't
+ strip anything more. */
+ if (*dest == '.' || IS_DIR_SEPARATOR (*dest))
+ {
+ *p = '.';
+ break;
+ }
+ src = p + 3;
+ while (IS_DIR_SEPARATOR (*src))
+ ++src;
+ p = dest;
+ while ((*dest++ = *src++) != 0)
+ ;
+ }
+ }
+ else
+ ++p;
}
+
+#ifdef UPDATE_PATH_HOST_CANONICALIZE
+ /* Perform host dependent canonicalization when needed. */
+ UPDATE_PATH_HOST_CANONICALIZE (result);
#endif
- return path;
+#ifdef DIR_SEPARATOR_2
+ /* Convert DIR_SEPARATOR_2 to DIR_SEPARATOR. */
+ if (DIR_SEPARATOR_2 != DIR_SEPARATOR)
+ tr (result, DIR_SEPARATOR_2, DIR_SEPARATOR);
+#endif
+
+#if defined (DIR_SEPARATOR) && !defined (DIR_SEPARATOR_2)
+ if (DIR_SEPARATOR != '/')
+ tr (result, '/', DIR_SEPARATOR);
+#endif
+
+ return result;
}
-/* Reset the standard prefix */
+/* Reset the standard prefix. */
void
-set_std_prefix (prefix, len)
- char *prefix;
- int len;
+set_std_prefix (const char *prefix, int len)
{
std_prefix = save_string (prefix, len);
}
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