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+/* Copyright (C) 2000 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+
+#if __BOUNDED_POINTERS__
+
+ /* The command-line arg vector and environment vector come to us from
+ the OS as an unbounded pointer to an array of unbounded strings.
+ The user's main expects argv and __environ to be bounded pointers
+ to arrays of bounded strings. */
+# define INIT_ARGV_and_ENVIRON \
+ do { \
+ int envc; \
+ for (envc = 0; *ubp_ev; ubp_ev++, envc++) \
+ ; \
+ ubp_ev -= envc; \
+ \
+ /* GKM FIXME: we could save some space by allocating only enough for \
+ the additional low & high words, and destructively rewriting \
+ argv in place. */ \
+ __ptrvalue (argv) = __ptrlow (argv) \
+ = alloca ((argc + envc + 2) * sizeof (*argv)); \
+ __ptrhigh (argv) = __ptrvalue (argv) + argc + 1; \
+ __ptrvalue (__environ) = __ptrlow (__environ) = __ptrhigh (argv); \
+ __ptrhigh (__environ) = __ptrvalue (__environ) + envc + 1; \
+ boundify_vector (__environ, ubp_ev); \
+ boundify_vector (argv, ubp_av); \
+ } while (0)
+
+
+/* Copy an unbounded vector of unbounded strings into a bounded
+ counterpart. */
+
+static void
+boundify_vector (char **dest, char *__unbounded *__unbounded src)
+{
+ char *__unbounded s;
+ for (; *src; src++, dest++)
+ {
+ __ptrvalue (*dest) = __ptrlow (*dest) = *src;
+ __ptrhigh (*dest) = src[1];
+ }
+ *dest = 0;
+ /* The OS lays out strings contiguously in vector order,
+ so */
+ for (s = __ptrvalue (dest[-1]); *s; s++)
+ ;
+ __ptrhigh (dest[-1]) = ++s;
+}
+
+#else
+
+# define INIT_ARGV_and_ENVIRON __environ = ubp_ev
+
+#endif