Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 154 insertions, 0 deletions

diff --git a/REORG.TODO/wcsmbs/mbrtoc16.c b/REORG.TODO/wcsmbs/mbrtoc16.c
new file mode 100644
index 0000000000..0fc5bc5d82
--- /dev/null
+++ b/REORG.TODO/wcsmbs/mbrtoc16.c
@@ -0,0 +1,154 @@
+/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <assert.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <gconv.h>
+#include <uchar.h>
+#include <wcsmbsload.h>
+
+#include <sysdep.h>
+
+#ifndef EILSEQ
+# define EILSEQ EINVAL
+#endif
+
+
+/* This is the private state used if PS is NULL.  */
+static mbstate_t state;
+
+size_t
+mbrtoc16 (char16_t *pc16, const char *s, size_t n, mbstate_t *ps)
+{
+  if (ps == NULL)
+    ps = &state;
+
+  /* The standard text does not say that S being NULL means the state
+     is reset even if the second half of a surrogate still have to be
+     returned.  In fact, the error code description indicates
+     otherwise.  Therefore always first try to return a second
+     half.  */
+  if (ps->__count & 0x80000000)
+    {
+      /* We have to return the second word for a surrogate.  */
+      ps->__count &= 0x7fffffff;
+      *pc16 = ps->__value.__wch;
+      ps->__value.__wch = L'\0';
+      return (size_t) -3;
+    }
+
+  wchar_t wc;
+  struct __gconv_step_data data;
+  int status;
+  size_t result;
+  size_t dummy;
+  const unsigned char *inbuf, *endbuf;
+  unsigned char *outbuf = (unsigned char *) &wc;
+  const struct gconv_fcts *fcts;
+
+  /* Set information for this step.  */
+  data.__invocation_counter = 0;
+  data.__internal_use = 1;
+  data.__flags = __GCONV_IS_LAST;
+  data.__statep = ps;
+
+  /* A first special case is if S is NULL.  This means put PS in the
+     initial state.  */
+  if (s == NULL)
+    {
+      pc16 = NULL;
+      s = "";
+      n = 1;
+    }
+
+  if (n == 0)
+    return (size_t) -2;
+
+  /* Tell where we want the result.  */
+  data.__outbuf = outbuf;
+  data.__outbufend = outbuf + sizeof (wchar_t);
+
+  /* Get the conversion functions.  */
+  fcts = get_gconv_fcts (_NL_CURRENT_DATA (LC_CTYPE));
+
+  /* Do a normal conversion.  */
+  inbuf = (const unsigned char *) s;
+  endbuf = inbuf + n;
+  if (__glibc_unlikely (endbuf < inbuf))
+    {
+      endbuf = (const unsigned char *) ~(uintptr_t) 0;
+      if (endbuf == inbuf)
+	goto ilseq;
+    }
+  __gconv_fct fct = fcts->towc->__fct;
+#ifdef PTR_DEMANGLE
+  if (fcts->towc->__shlib_handle != NULL)
+    PTR_DEMANGLE (fct);
+#endif
+
+  status = DL_CALL_FCT (fct, (fcts->towc, &data, &inbuf, endbuf,
+			      NULL, &dummy, 0, 1));
+
+  /* There must not be any problems with the conversion but illegal input
+     characters.  The output buffer must be large enough, otherwise the
+     definition of MB_CUR_MAX is not correct.  All the other possible
+     errors also must not happen.  */
+  assert (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
+	  || status == __GCONV_ILLEGAL_INPUT
+	  || status == __GCONV_INCOMPLETE_INPUT
+	  || status == __GCONV_FULL_OUTPUT);
+
+  if (status == __GCONV_OK || status == __GCONV_EMPTY_INPUT
+      || status == __GCONV_FULL_OUTPUT)
+    {
+      result = inbuf - (const unsigned char *) s;
+
+      if (wc < 0x10000)
+	{
+	  if (pc16 != NULL)
+	    *pc16 = wc;
+
+	  if (data.__outbuf != outbuf && wc == L'\0')
+	    {
+	      /* The converted character is the NUL character.  */
+	      assert (__mbsinit (data.__statep));
+	      result = 0;
+	    }
+	}
+      else
+	{
+	  /* This is a surrogate.  */
+	  if (pc16 != NULL)
+	    *pc16 = 0xd7c0 + (wc >> 10);
+
+	  ps->__count |= 0x80000000;
+	  ps->__value.__wch = 0xdc00 + (wc & 0x3ff);
+	}
+    }
+  else if (status == __GCONV_INCOMPLETE_INPUT)
+    result = (size_t) -2;
+  else
+    {
+    ilseq:
+      result = (size_t) -1;
+      __set_errno (EILSEQ);
+    }
+
+  return result;
+}