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, 532 insertions, 0 deletions

diff --git a/REORG.TODO/iconvdata/utf-7.c b/REORG.TODO/iconvdata/utf-7.c
new file mode 100644
index 0000000000..e8c6e7c0bb
--- /dev/null
+++ b/REORG.TODO/iconvdata/utf-7.c
@@ -0,0 +1,532 @@
+/* Conversion module for UTF-7.
+   Copyright (C) 2000-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Bruno Haible <haible@clisp.cons.org>, 2000.
+
+   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/>.  */
+
+/* UTF-7 is a legacy encoding used for transmitting Unicode within the
+   ASCII character set, used primarily by mail agents.  New programs
+   are encouraged to use UTF-8 instead.
+
+   UTF-7 is specified in RFC 2152 (and old RFC 1641, RFC 1642).  The
+   original Base64 encoding is defined in RFC 2045.  */
+
+#include <dlfcn.h>
+#include <gconv.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+
+/* Define this to 1 if you want the so-called "optional direct" characters
+      ! " # $ % & * ; < = > @ [ ] ^ _ ` { | }
+   to be encoded. Define to 0 if you want them to be passed straight
+   through, like the so-called "direct" characters.
+   We set this to 1 because it's safer.
+ */
+#define UTF7_ENCODE_OPTIONAL_CHARS 1
+
+
+/* The set of "direct characters":
+   A-Z a-z 0-9 ' ( ) , - . / : ? space tab lf cr
+*/
+
+static const unsigned char direct_tab[128 / 8] =
+  {
+    0x00, 0x26, 0x00, 0x00, 0x81, 0xf3, 0xff, 0x87,
+    0xfe, 0xff, 0xff, 0x07, 0xfe, 0xff, 0xff, 0x07
+  };
+
+static int
+isdirect (uint32_t ch)
+{
+  return (ch < 128 && ((direct_tab[ch >> 3] >> (ch & 7)) & 1));
+}
+
+
+/* The set of "direct and optional direct characters":
+   A-Z a-z 0-9 ' ( ) , - . / : ? space tab lf cr
+   ! " # $ % & * ; < = > @ [ ] ^ _ ` { | }
+*/
+
+static const unsigned char xdirect_tab[128 / 8] =
+  {
+    0x00, 0x26, 0x00, 0x00, 0xff, 0xf7, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xef, 0xff, 0xff, 0xff, 0x3f
+  };
+
+static int
+isxdirect (uint32_t ch)
+{
+  return (ch < 128 && ((xdirect_tab[ch >> 3] >> (ch & 7)) & 1));
+}
+
+
+/* The set of "extended base64 characters":
+   A-Z a-z 0-9 + / -
+*/
+
+static const unsigned char xbase64_tab[128 / 8] =
+  {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0xa8, 0xff, 0x03,
+    0xfe, 0xff, 0xff, 0x07, 0xfe, 0xff, 0xff, 0x07
+  };
+
+static int
+isxbase64 (uint32_t ch)
+{
+  return (ch < 128 && ((xbase64_tab[ch >> 3] >> (ch & 7)) & 1));
+}
+
+
+/* Converts a value in the range 0..63 to a base64 encoded char.  */
+static unsigned char
+base64 (unsigned int i)
+{
+  if (i < 26)
+    return i + 'A';
+  else if (i < 52)
+    return i - 26 + 'a';
+  else if (i < 62)
+    return i - 52 + '0';
+  else if (i == 62)
+    return '+';
+  else if (i == 63)
+    return '/';
+  else
+    abort ();
+}
+
+
+/* Definitions used in the body of the `gconv' function.  */
+#define CHARSET_NAME		"UTF-7//"
+#define DEFINE_INIT		1
+#define DEFINE_FINI		1
+#define FROM_LOOP		from_utf7_loop
+#define TO_LOOP			to_utf7_loop
+#define MIN_NEEDED_FROM		1
+#define MAX_NEEDED_FROM		6
+#define MIN_NEEDED_TO		4
+#define MAX_NEEDED_TO		4
+#define ONE_DIRECTION		0
+#define PREPARE_LOOP \
+  mbstate_t saved_state;						      \
+  mbstate_t *statep = data->__statep;
+#define EXTRA_LOOP_ARGS		, statep
+
+
+/* Since we might have to reset input pointer we must be able to save
+   and restore the state.  */
+#define SAVE_RESET_STATE(Save) \
+  if (Save)								      \
+    saved_state = *statep;						      \
+  else									      \
+    *statep = saved_state
+
+
+/* First define the conversion function from UTF-7 to UCS4.
+   The state is structured as follows:
+     __count bit 2..0: zero
+     __count bit 8..3: shift
+     __wch: data
+   Precise meaning:
+     shift      data
+       0         --          not inside base64 encoding
+     1..32  XX..XX00..00     inside base64, (32 - shift) bits pending
+   This state layout is simpler than relying on STORE_REST/UNPACK_BYTES.
+
+   When shift = 0, __wch needs to store at most one lookahead byte (see
+   __GCONV_INCOMPLETE_INPUT below).
+*/
+#define MIN_NEEDED_INPUT	MIN_NEEDED_FROM
+#define MAX_NEEDED_INPUT	MAX_NEEDED_FROM
+#define MIN_NEEDED_OUTPUT	MIN_NEEDED_TO
+#define MAX_NEEDED_OUTPUT	MAX_NEEDED_TO
+#define LOOPFCT			FROM_LOOP
+#define BODY \
+  {									      \
+    uint_fast8_t ch = *inptr;						      \
+									      \
+    if ((statep->__count >> 3) == 0)					      \
+      {									      \
+	/* base64 encoding inactive.  */				      \
+	if (isxdirect (ch))						      \
+	  {								      \
+	    inptr++;							      \
+	    put32 (outptr, ch);						      \
+	    outptr += 4;						      \
+	  }								      \
+	else if (__glibc_likely (ch == '+'))				      \
+	  {								      \
+	    if (__glibc_unlikely (inptr + 2 > inend))			      \
+	      {								      \
+		/* Not enough input available.  */			      \
+		result = __GCONV_INCOMPLETE_INPUT;			      \
+		break;							      \
+	      }								      \
+	    if (inptr[1] == '-')					      \
+	      {								      \
+		inptr += 2;						      \
+		put32 (outptr, ch);					      \
+		outptr += 4;						      \
+	      }								      \
+	    else							      \
+	      {								      \
+		/* Switch into base64 mode.  */				      \
+		inptr++;						      \
+		statep->__count = (32 << 3);				      \
+		statep->__value.__wch = 0;				      \
+	      }								      \
+	  }								      \
+	else								      \
+	  {								      \
+	    /* The input is invalid.  */				      \
+	    STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \
+	  }								      \
+      }									      \
+    else								      \
+      {									      \
+	/* base64 encoding active.  */					      \
+	uint32_t i;							      \
+	int shift;							      \
+									      \
+	if (ch >= 'A' && ch <= 'Z')					      \
+	  i = ch - 'A';							      \
+	else if (ch >= 'a' && ch <= 'z')				      \
+	  i = ch - 'a' + 26;						      \
+	else if (ch >= '0' && ch <= '9')				      \
+	  i = ch - '0' + 52;						      \
+	else if (ch == '+')						      \
+	  i = 62;							      \
+	else if (ch == '/')						      \
+	  i = 63;							      \
+	else								      \
+	  {								      \
+	    /* Terminate base64 encoding.  */				      \
+									      \
+	    /* If accumulated data is nonzero, the input is invalid.  */      \
+	    /* Also, partial UTF-16 characters are invalid.  */		      \
+	    if (__builtin_expect (statep->__value.__wch != 0, 0)	      \
+		|| __builtin_expect ((statep->__count >> 3) <= 26, 0))	      \
+	      {								      \
+		STANDARD_FROM_LOOP_ERR_HANDLER ((statep->__count = 0, 1));    \
+	      }								      \
+									      \
+	    if (ch == '-')						      \
+	      inptr++;							      \
+									      \
+	    statep->__count = 0;					      \
+	    continue;							      \
+	  }								      \
+									      \
+	/* Concatenate the base64 integer i to the accumulator.  */	      \
+	shift = (statep->__count >> 3);					      \
+	if (shift > 6)							      \
+	  {								      \
+	    uint32_t wch;						      \
+									      \
+	    shift -= 6;							      \
+	    wch = statep->__value.__wch | (i << shift);			      \
+									      \
+	    if (shift <= 16 && shift > 10)				      \
+	      {								      \
+		/* An UTF-16 character has just been completed.  */	      \
+		uint32_t wc1 = wch >> 16;				      \
+									      \
+		/* UTF-16: When we see a High Surrogate, we must also decode  \
+		   the following Low Surrogate. */			      \
+		if (!(wc1 >= 0xd800 && wc1 < 0xdc00))			      \
+		  {							      \
+		    wch = wch << 16;					      \
+		    shift += 16;					      \
+		    put32 (outptr, wc1);				      \
+		    outptr += 4;					      \
+		  }							      \
+	      }								      \
+	    else if (shift <= 10 && shift > 4)				      \
+	      {								      \
+		/* After a High Surrogate, verify that the next 16 bit	      \
+		   indeed form a Low Surrogate.  */			      \
+		uint32_t wc2 = wch & 0xffff;				      \
+									      \
+		if (! __builtin_expect (wc2 >= 0xdc00 && wc2 < 0xe000, 1))    \
+		  {							      \
+		    STANDARD_FROM_LOOP_ERR_HANDLER ((statep->__count = 0, 1));\
+		  }							      \
+	      }								      \
+									      \
+	    statep->__value.__wch = wch;				      \
+	  }								      \
+	else								      \
+	  {								      \
+	    /* An UTF-16 surrogate pair has just been completed.  */	      \
+	    uint32_t wc1 = (uint32_t) statep->__value.__wch >> 16;	      \
+	    uint32_t wc2 = ((uint32_t) statep->__value.__wch & 0xffff)	      \
+			   | (i >> (6 - shift));			      \
+									      \
+	    statep->__value.__wch = (i << shift) << 26;			      \
+	    shift += 26;						      \
+									      \
+	    assert (wc1 >= 0xd800 && wc1 < 0xdc00);			      \
+	    assert (wc2 >= 0xdc00 && wc2 < 0xe000);			      \
+	    put32 (outptr,						      \
+		   0x10000 + ((wc1 - 0xd800) << 10) + (wc2 - 0xdc00));	      \
+	    outptr += 4;						      \
+	  }								      \
+									      \
+	statep->__count = shift << 3;					      \
+									      \
+	/* Now that we digested the input increment the input pointer.  */    \
+	inptr++;							      \
+      }									      \
+  }
+#define LOOP_NEED_FLAGS
+#define EXTRA_LOOP_DECLS	, mbstate_t *statep
+#include <iconv/loop.c>
+
+
+/* Next, define the conversion from UCS4 to UTF-7.
+   The state is structured as follows:
+     __count bit 2..0: zero
+     __count bit 4..3: shift
+     __count bit 8..5: data
+   Precise meaning:
+     shift      data
+       0         0           not inside base64 encoding
+       1         0           inside base64, no pending bits
+       2       XX00          inside base64, 2 bits known for next byte
+       3       XXXX          inside base64, 4 bits known for next byte
+
+   __count bit 2..0 and __wch are always zero, because this direction
+   never returns __GCONV_INCOMPLETE_INPUT.
+*/
+#define MIN_NEEDED_INPUT	MIN_NEEDED_TO
+#define MAX_NEEDED_INPUT	MAX_NEEDED_TO
+#define MIN_NEEDED_OUTPUT	MIN_NEEDED_FROM
+#define MAX_NEEDED_OUTPUT	MAX_NEEDED_FROM
+#define LOOPFCT			TO_LOOP
+#define BODY \
+  {									      \
+    uint32_t ch = get32 (inptr);					      \
+									      \
+    if ((statep->__count & 0x18) == 0)					      \
+      {									      \
+	/* base64 encoding inactive */					      \
+	if (UTF7_ENCODE_OPTIONAL_CHARS ? isdirect (ch) : isxdirect (ch))      \
+	  {								      \
+	    *outptr++ = (unsigned char) ch;				      \
+	  }								      \
+	else								      \
+	  {								      \
+	    size_t count;						      \
+									      \
+	    if (ch == '+')						      \
+	      count = 2;						      \
+	    else if (ch < 0x10000)					      \
+	      count = 3;						      \
+	    else if (ch < 0x110000)					      \
+	      count = 6;						      \
+	    else							      \
+	      STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
+									      \
+	    if (__glibc_unlikely (outptr + count > outend))		      \
+	      {								      \
+		result = __GCONV_FULL_OUTPUT;				      \
+		break;							      \
+	      }								      \
+									      \
+	    *outptr++ = '+';						      \
+	    if (ch == '+')						      \
+	      *outptr++ = '-';						      \
+	    else if (ch < 0x10000)					      \
+	      {								      \
+		*outptr++ = base64 (ch >> 10);				      \
+		*outptr++ = base64 ((ch >> 4) & 0x3f);			      \
+		statep->__count = ((ch & 15) << 5) | (3 << 3);		      \
+	      }								      \
+	    else if (ch < 0x110000)					      \
+	      {								      \
+		uint32_t ch1 = 0xd800 + ((ch - 0x10000) >> 10);		      \
+		uint32_t ch2 = 0xdc00 + ((ch - 0x10000) & 0x3ff);	      \
+									      \
+		ch = (ch1 << 16) | ch2;					      \
+		*outptr++ = base64 (ch >> 26);				      \
+		*outptr++ = base64 ((ch >> 20) & 0x3f);			      \
+		*outptr++ = base64 ((ch >> 14) & 0x3f);			      \
+		*outptr++ = base64 ((ch >> 8) & 0x3f);			      \
+		*outptr++ = base64 ((ch >> 2) & 0x3f);			      \
+		statep->__count = ((ch & 3) << 7) | (2 << 3);		      \
+	      }								      \
+	    else							      \
+	      abort ();							      \
+	  }								      \
+      }									      \
+    else								      \
+      {									      \
+	/* base64 encoding active */					      \
+	if (UTF7_ENCODE_OPTIONAL_CHARS ? isdirect (ch) : isxdirect (ch))      \
+	  {								      \
+	    /* deactivate base64 encoding */				      \
+	    size_t count;						      \
+									      \
+	    count = ((statep->__count & 0x18) >= 0x10) + isxbase64 (ch) + 1;  \
+	    if (__glibc_unlikely (outptr + count > outend))		      \
+	      {								      \
+		result = __GCONV_FULL_OUTPUT;				      \
+		break;							      \
+	      }								      \
+									      \
+	    if ((statep->__count & 0x18) >= 0x10)			      \
+	      *outptr++ = base64 ((statep->__count >> 3) & ~3);		      \
+	    if (isxbase64 (ch))						      \
+	      *outptr++ = '-';						      \
+	    *outptr++ = (unsigned char) ch;				      \
+	    statep->__count = 0;					      \
+	  }								      \
+	else								      \
+	  {								      \
+	    size_t count;						      \
+									      \
+	    if (ch < 0x10000)						      \
+	      count = ((statep->__count & 0x18) >= 0x10 ? 3 : 2);	      \
+	    else if (ch < 0x110000)					      \
+	      count = ((statep->__count & 0x18) >= 0x18 ? 6 : 5);	      \
+	    else							      \
+	      STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
+									      \
+	    if (__glibc_unlikely (outptr + count > outend))		      \
+	      {								      \
+		result = __GCONV_FULL_OUTPUT;				      \
+		break;							      \
+	      }								      \
+									      \
+	    if (ch < 0x10000)						      \
+	      {								      \
+		switch ((statep->__count >> 3) & 3)			      \
+		  {							      \
+		  case 1:						      \
+		    *outptr++ = base64 (ch >> 10);			      \
+		    *outptr++ = base64 ((ch >> 4) & 0x3f);		      \
+		    statep->__count = ((ch & 15) << 5) | (3 << 3);	      \
+		    break;						      \
+		  case 2:						      \
+		    *outptr++ =						      \
+		      base64 (((statep->__count >> 3) & ~3) | (ch >> 12));    \
+		    *outptr++ = base64 ((ch >> 6) & 0x3f);		      \
+		    *outptr++ = base64 (ch & 0x3f);			      \
+		    statep->__count = (1 << 3);				      \
+		    break;						      \
+		  case 3:						      \
+		    *outptr++ =						      \
+		      base64 (((statep->__count >> 3) & ~3) | (ch >> 14));    \
+		    *outptr++ = base64 ((ch >> 8) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 2) & 0x3f);		      \
+		    statep->__count = ((ch & 3) << 7) | (2 << 3);	      \
+		    break;						      \
+		  default:						      \
+		    abort ();						      \
+		  }							      \
+	      }								      \
+	    else if (ch < 0x110000)					      \
+	      {								      \
+		uint32_t ch1 = 0xd800 + ((ch - 0x10000) >> 10);		      \
+		uint32_t ch2 = 0xdc00 + ((ch - 0x10000) & 0x3ff);	      \
+									      \
+		ch = (ch1 << 16) | ch2;					      \
+		switch ((statep->__count >> 3) & 3)			      \
+		  {							      \
+		  case 1:						      \
+		    *outptr++ = base64 (ch >> 26);			      \
+		    *outptr++ = base64 ((ch >> 20) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 14) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 8) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 2) & 0x3f);		      \
+		    statep->__count = ((ch & 3) << 7) | (2 << 3);	      \
+		    break;						      \
+		  case 2:						      \
+		    *outptr++ =						      \
+		      base64 (((statep->__count >> 3) & ~3) | (ch >> 28));    \
+		    *outptr++ = base64 ((ch >> 22) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 16) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 10) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 4) & 0x3f);		      \
+		    statep->__count = ((ch & 15) << 5) | (3 << 3);	      \
+		    break;						      \
+		  case 3:						      \
+		    *outptr++ =						      \
+		      base64 (((statep->__count >> 3) & ~3) | (ch >> 30));    \
+		    *outptr++ = base64 ((ch >> 24) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 18) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 12) & 0x3f);		      \
+		    *outptr++ = base64 ((ch >> 6) & 0x3f);		      \
+		    *outptr++ = base64 (ch & 0x3f);			      \
+		    statep->__count = (1 << 3);				      \
+		    break;						      \
+		  default:						      \
+		    abort ();						      \
+		  }							      \
+	      }								      \
+	    else							      \
+	      abort ();							      \
+	  }								      \
+      }									      \
+									      \
+    /* Now that we wrote the output increment the input pointer.  */	      \
+    inptr += 4;								      \
+  }
+#define LOOP_NEED_FLAGS
+#define EXTRA_LOOP_DECLS	, mbstate_t *statep
+#include <iconv/loop.c>
+
+
+/* Since this is a stateful encoding we have to provide code which resets
+   the output state to the initial state.  This has to be done during the
+   flushing.  */
+#define EMIT_SHIFT_TO_INIT \
+  if (FROM_DIRECTION)							      \
+    /* Nothing to emit.  */						      \
+    memset (data->__statep, '\0', sizeof (mbstate_t));			      \
+  else									      \
+    {									      \
+      /* The "to UTF-7" direction.  Flush the remaining bits and terminate    \
+	 with a '-' byte.  This will guarantee correct decoding if more	      \
+	 UTF-7 encoded text is added afterwards.  */			      \
+      int state = data->__statep->__count;				      \
+									      \
+      if (state & 0x18)							      \
+	{								      \
+	  /* Deactivate base64 encoding.  */				      \
+	  size_t count = ((state & 0x18) >= 0x10) + 1;			      \
+									      \
+	  if (__glibc_unlikely (outbuf + count > outend))		      \
+	    /* We don't have enough room in the output buffer.  */	      \
+	    status = __GCONV_FULL_OUTPUT;				      \
+	  else								      \
+	    {								      \
+	      /* Write out the shift sequence.  */			      \
+	      if ((state & 0x18) >= 0x10)				      \
+		*outbuf++ = base64 ((state >> 3) & ~3);			      \
+	      *outbuf++ = '-';						      \
+									      \
+	      data->__statep->__count = 0;				      \
+	    }								      \
+	}								      \
+      else								      \
+	data->__statep->__count = 0;					      \
+    }
+
+
+/* Now define the toplevel functions.  */
+#include <iconv/skeleton.c>