Import glibc-mainline for 2006-08-16

git-svn-id: svn://svn.eglibc.org/fsf/trunk@4 7b3dc134-2b1b-0410-93df-9e9f96275f8d

1 files changed, 237 insertions, 0 deletions

diff --git a/libc/sunrpc/xdr_mem.c b/libc/sunrpc/xdr_mem.c
new file mode 100644
index 000000000..e3167de04
--- /dev/null
+++ b/libc/sunrpc/xdr_mem.c
@@ -0,0 +1,237 @@
+/*
+ * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
+ * unrestricted use provided that this legend is included on all tape
+ * media and as a part of the software program in whole or part.  Users
+ * may copy or modify Sun RPC without charge, but are not authorized
+ * to license or distribute it to anyone else except as part of a product or
+ * program developed by the user.
+ *
+ * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
+ * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ *
+ * Sun RPC is provided with no support and without any obligation on the
+ * part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ *
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
+ * OR ANY PART THEREOF.
+ *
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ *
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California  94043
+ */
+
+/*
+ * xdr_mem.h, XDR implementation using memory buffers.
+ *
+ * Copyright (C) 1984, Sun Microsystems, Inc.
+ *
+ * If you have some data to be interpreted as external data representation
+ * or to be converted to external data representation in a memory buffer,
+ * then this is the package for you.
+ *
+ */
+
+#include <string.h>
+#include <limits.h>
+#include <rpc/rpc.h>
+
+static bool_t xdrmem_getlong (XDR *, long *);
+static bool_t xdrmem_putlong (XDR *, const long *);
+static bool_t xdrmem_getbytes (XDR *, caddr_t, u_int);
+static bool_t xdrmem_putbytes (XDR *, const char *, u_int);
+static u_int xdrmem_getpos (const XDR *);
+static bool_t xdrmem_setpos (XDR *, u_int);
+static int32_t *xdrmem_inline (XDR *, u_int);
+static void xdrmem_destroy (XDR *);
+static bool_t xdrmem_getint32 (XDR *, int32_t *);
+static bool_t xdrmem_putint32 (XDR *, const int32_t *);
+
+static const struct xdr_ops xdrmem_ops =
+{
+  xdrmem_getlong,
+  xdrmem_putlong,
+  xdrmem_getbytes,
+  xdrmem_putbytes,
+  xdrmem_getpos,
+  xdrmem_setpos,
+  xdrmem_inline,
+  xdrmem_destroy,
+  xdrmem_getint32,
+  xdrmem_putint32
+};
+
+/*
+ * The procedure xdrmem_create initializes a stream descriptor for a
+ * memory buffer.
+ */
+void
+xdrmem_create (XDR *xdrs, const caddr_t addr, u_int size, enum xdr_op op)
+{
+  xdrs->x_op = op;
+  /* We have to add the const since the `struct xdr_ops' in `struct XDR'
+     is not `const'.  */
+  xdrs->x_ops = (struct xdr_ops *) &xdrmem_ops;
+  xdrs->x_private = xdrs->x_base = addr;
+  xdrs->x_handy = size;
+}
+INTDEF(xdrmem_create)
+
+/*
+ * Nothing needs to be done for the memory case.  The argument is clearly
+ * const.
+ */
+
+static void
+xdrmem_destroy (XDR *xdrs)
+{
+}
+
+/*
+ * Gets the next word from the memory referenced by xdrs and places it
+ * in the long pointed to by lp.  It then increments the private word to
+ * point at the next element.  Neither object pointed to is const
+ */
+static bool_t
+xdrmem_getlong (XDR *xdrs, long *lp)
+{
+  if (xdrs->x_handy < 4)
+    return FALSE;
+  xdrs->x_handy -= 4;
+  *lp = (int32_t) ntohl ((*((int32_t *) (xdrs->x_private))));
+  xdrs->x_private += 4;
+  return TRUE;
+}
+
+/*
+ * Puts the long pointed to by lp in the memory referenced by xdrs.  It
+ * then increments the private word to point at the next element.  The
+ * long pointed at is const
+ */
+static bool_t
+xdrmem_putlong (XDR *xdrs, const long *lp)
+{
+  if (xdrs->x_handy < 4)
+    return FALSE;
+  xdrs->x_handy -= 4;
+  *(int32_t *) xdrs->x_private = htonl (*lp);
+  xdrs->x_private += 4;
+  return TRUE;
+}
+
+/*
+ * Gets an unaligned number of bytes from the xdrs structure and writes them
+ * to the address passed in addr.  Be very careful when calling this routine
+ * as it could leave the xdrs pointing to an unaligned structure which is not
+ * a good idea.  None of the things pointed to are const.
+ */
+static bool_t
+xdrmem_getbytes (XDR *xdrs, caddr_t addr, u_int len)
+{
+  if (xdrs->x_handy < len)
+    return FALSE;
+  xdrs->x_handy -= len;
+  memcpy (addr, xdrs->x_private, len);
+  xdrs->x_private += len;
+  return TRUE;
+}
+
+/*
+ * The complementary function to the above.  The same warnings apply about
+ * unaligned data.  The source address is const.
+ */
+static bool_t
+xdrmem_putbytes (XDR *xdrs, const char *addr, u_int len)
+{
+  if (xdrs->x_handy < len)
+    return FALSE;
+  xdrs->x_handy -= len;
+  memcpy (xdrs->x_private, addr, len);
+  xdrs->x_private += len;
+  return TRUE;
+}
+
+/*
+ * Not sure what this one does.  But it clearly doesn't modify the contents
+ * of xdrs.  **FIXME** does this not assume u_int == u_long?
+ */
+static u_int
+xdrmem_getpos (const XDR *xdrs)
+{
+  return (u_long) xdrs->x_private - (u_long) xdrs->x_base;
+}
+
+/*
+ * xdrs modified
+ */
+static bool_t
+xdrmem_setpos (xdrs, pos)
+     XDR *xdrs;
+     u_int pos;
+{
+  caddr_t newaddr = xdrs->x_base + pos;
+  caddr_t lastaddr = xdrs->x_private + xdrs->x_handy;
+
+  if ((long) newaddr > (long) lastaddr
+      || (UINT_MAX < LONG_MAX
+	  && (long) UINT_MAX < (long) lastaddr - (long) newaddr))
+    return FALSE;
+  xdrs->x_private = newaddr;
+  xdrs->x_handy = (long) lastaddr - (long) newaddr;
+  return TRUE;
+}
+
+/*
+ * xdrs modified
+ */
+static int32_t *
+xdrmem_inline (XDR *xdrs, u_int len)
+{
+  int32_t *buf = 0;
+
+  if (xdrs->x_handy >= len)
+    {
+      xdrs->x_handy -= len;
+      buf = (int32_t *) xdrs->x_private;
+      xdrs->x_private += len;
+    }
+  return buf;
+}
+
+/*
+ * Gets the next word from the memory referenced by xdrs and places it
+ * in the int pointed to by ip.  It then increments the private word to
+ * point at the next element.  Neither object pointed to is const
+ */
+static bool_t
+xdrmem_getint32 (XDR *xdrs, int32_t *ip)
+{
+  if (xdrs->x_handy < 4)
+    return FALSE;
+  xdrs->x_handy -= 4;
+  *ip = ntohl ((*((int32_t *) (xdrs->x_private))));
+  xdrs->x_private += 4;
+  return TRUE;
+}
+
+/*
+ * Puts the long pointed to by lp in the memory referenced by xdrs.  It
+ * then increments the private word to point at the next element.  The
+ * long pointed at is const
+ */
+static bool_t
+xdrmem_putint32 (XDR *xdrs, const int32_t *ip)
+{
+  if (xdrs->x_handy < 4)
+    return FALSE;
+  xdrs->x_handy -= 4;
+  *(int32_t *) xdrs->x_private = htonl (*ip);
+  xdrs->x_private += 4;
+  return TRUE;
+}