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-rw-r--r--libidn/nfkc.c1057
1 files changed, 0 insertions, 1057 deletions
diff --git a/libidn/nfkc.c b/libidn/nfkc.c
deleted file mode 100644
index f3e41d038b..0000000000
--- a/libidn/nfkc.c
+++ /dev/null
@@ -1,1057 +0,0 @@
-/* nfkc.c	Unicode normalization utilities.
- * Copyright (C) 2002, 2003  Simon Josefsson
- *
- * This file is part of GNU Libidn.
- *
- * GNU Libidn 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.
- *
- * GNU Libidn 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 GNU Libidn; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#if HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <stdlib.h>
-#include <string.h>
-#include <stdint.h>
-
-#include "stringprep.h"
-
-/* This file contains functions from GLIB, including gutf8.c and
- * gunidecomp.c, all licensed under LGPL and copyright hold by:
- *
- *  Copyright (C) 1999, 2000 Tom Tromey
- *  Copyright 2000 Red Hat, Inc.
- */
-
-/* Hacks to make syncing with GLIB code easier. */
-#define gboolean int
-#define gchar char
-#define guchar unsigned char
-#define glong long
-#define gint int
-#define guint unsigned int
-#define gushort unsigned short
-#define gint16 int16_t
-#define guint16 uint16_t
-#define gunichar uint32_t
-#define gsize size_t
-#define gssize ssize_t
-#define g_malloc malloc
-#define g_free free
-#define GError void
-#define g_set_error(a,b,c,d) ((void) 0)
-#define g_new(struct_type, n_structs)					\
-  ((struct_type *) g_malloc (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
-#  if defined (__GNUC__) && !defined (__STRICT_ANSI__) && !defined (__cplusplus)
-#    define G_STMT_START	(void)(
-#    define G_STMT_END		)
-#  else
-#    if (defined (sun) || defined (__sun__))
-#      define G_STMT_START	if (1)
-#      define G_STMT_END	else (void)0
-#    else
-#      define G_STMT_START	do
-#      define G_STMT_END	while (0)
-#    endif
-#  endif
-#define g_return_val_if_fail(expr,val)		G_STMT_START{ (void)0; }G_STMT_END
-#define G_N_ELEMENTS(arr)		(sizeof (arr) / sizeof ((arr)[0]))
-#define TRUE 1
-#define FALSE 0
-
-/* Code from GLIB gunicode.h starts here. */
-
-typedef enum
-{
-  G_NORMALIZE_DEFAULT,
-  G_NORMALIZE_NFD = G_NORMALIZE_DEFAULT,
-  G_NORMALIZE_DEFAULT_COMPOSE,
-  G_NORMALIZE_NFC = G_NORMALIZE_DEFAULT_COMPOSE,
-  G_NORMALIZE_ALL,
-  G_NORMALIZE_NFKD = G_NORMALIZE_ALL,
-  G_NORMALIZE_ALL_COMPOSE,
-  G_NORMALIZE_NFKC = G_NORMALIZE_ALL_COMPOSE
-}
-GNormalizeMode;
-
-/* Code from GLIB gutf8.c starts here. */
-
-#define UTF8_COMPUTE(Char, Mask, Len)		\
-  if (Char < 128)				\
-    {						\
-      Len = 1;					\
-      Mask = 0x7f;				\
-    }						\
-  else if ((Char & 0xe0) == 0xc0)		\
-    {						\
-      Len = 2;					\
-      Mask = 0x1f;				\
-    }						\
-  else if ((Char & 0xf0) == 0xe0)		\
-    {						\
-      Len = 3;					\
-      Mask = 0x0f;				\
-    }						\
-  else if ((Char & 0xf8) == 0xf0)		\
-    {						\
-      Len = 4;					\
-      Mask = 0x07;				\
-    }						\
-  else if ((Char & 0xfc) == 0xf8)		\
-    {						\
-      Len = 5;					\
-      Mask = 0x03;				\
-    }						\
-  else if ((Char & 0xfe) == 0xfc)		\
-    {						\
-      Len = 6;					\
-      Mask = 0x01;				\
-    }						\
-  else						\
-    Len = -1;
-
-#define UTF8_LENGTH(Char)			\
-  ((Char) < 0x80 ? 1 :				\
-   ((Char) < 0x800 ? 2 :			\
-    ((Char) < 0x10000 ? 3 :			\
-     ((Char) < 0x200000 ? 4 :			\
-      ((Char) < 0x4000000 ? 5 : 6)))))
-
-
-#define UTF8_GET(Result, Chars, Count, Mask, Len)	\
-  (Result) = (Chars)[0] & (Mask);			\
-  for ((Count) = 1; (Count) < (Len); ++(Count))		\
-    {							\
-      if (((Chars)[(Count)] & 0xc0) != 0x80)		\
-	{						\
-	  (Result) = -1;				\
-	  break;					\
-	}						\
-      (Result) <<= 6;					\
-      (Result) |= ((Chars)[(Count)] & 0x3f);		\
-    }
-
-#define UNICODE_VALID(Char)			\
-  ((Char) < 0x110000 &&				\
-   (((Char) & 0xFFFFF800) != 0xD800) &&		\
-   ((Char) < 0xFDD0 || (Char) > 0xFDEF) &&	\
-   ((Char) & 0xFFFE) != 0xFFFE)
-
-
-static const gchar utf8_skip_data[256] = {
-  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-  1, 1, 1, 1, 1, 1, 1,
-  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-  2, 2, 2, 2, 2, 2, 2,
-  3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5,
-  5, 5, 5, 6, 6, 1, 1
-};
-
-const gchar *const g_utf8_skip = utf8_skip_data;
-
-#define g_utf8_next_char(p) (char *)((p) + g_utf8_skip[*(guchar *)(p)])
-
-/*
- * g_utf8_strlen:
- * @p: pointer to the start of a UTF-8 encoded string.
- * @max: the maximum number of bytes to examine. If @max
- *       is less than 0, then the string is assumed to be
- *       nul-terminated. If @max is 0, @p will not be examined and
- *       may be %NULL.
- *
- * Returns the length of the string in characters.
- *
- * Return value: the length of the string in characters
- **/
-static glong
-g_utf8_strlen (const gchar * p, gssize max)
-{
-  glong len = 0;
-  const gchar *start = p;
-  g_return_val_if_fail (p != NULL || max == 0, 0);
-
-  if (max < 0)
-    {
-      while (*p)
-	{
-	  p = g_utf8_next_char (p);
-	  ++len;
-	}
-    }
-  else
-    {
-      if (max == 0 || !*p)
-	return 0;
-
-      p = g_utf8_next_char (p);
-
-      while (p - start < max && *p)
-	{
-	  ++len;
-	  p = g_utf8_next_char (p);
-	}
-
-      /* only do the last len increment if we got a complete
-       * char (don't count partial chars)
-       */
-      if (p - start == max)
-	++len;
-    }
-
-  return len;
-}
-
-/*
- * g_utf8_get_char:
- * @p: a pointer to Unicode character encoded as UTF-8
- *
- * Converts a sequence of bytes encoded as UTF-8 to a Unicode character.
- * If @p does not point to a valid UTF-8 encoded character, results are
- * undefined. If you are not sure that the bytes are complete
- * valid Unicode characters, you should use g_utf8_get_char_validated()
- * instead.
- *
- * Return value: the resulting character
- **/
-static gunichar
-g_utf8_get_char (const gchar * p)
-{
-  int i, mask = 0, len;
-  gunichar result;
-  unsigned char c = (unsigned char) *p;
-
-  UTF8_COMPUTE (c, mask, len);
-  if (len == -1)
-    return (gunichar) - 1;
-  UTF8_GET (result, p, i, mask, len);
-
-  return result;
-}
-
-/*
- * g_unichar_to_utf8:
- * @c: a ISO10646 character code
- * @outbuf: output buffer, must have at least 6 bytes of space.
- *       If %NULL, the length will be computed and returned
- *       and nothing will be written to @outbuf.
- *
- * Converts a single character to UTF-8.
- *
- * Return value: number of bytes written
- **/
-static int
-g_unichar_to_utf8 (gunichar c, gchar * outbuf)
-{
-  guint len = 0;
-  int first;
-  int i;
-
-  if (c < 0x80)
-    {
-      first = 0;
-      len = 1;
-    }
-  else if (c < 0x800)
-    {
-      first = 0xc0;
-      len = 2;
-    }
-  else if (c < 0x10000)
-    {
-      first = 0xe0;
-      len = 3;
-    }
-  else if (c < 0x200000)
-    {
-      first = 0xf0;
-      len = 4;
-    }
-  else if (c < 0x4000000)
-    {
-      first = 0xf8;
-      len = 5;
-    }
-  else
-    {
-      first = 0xfc;
-      len = 6;
-    }
-
-  if (outbuf)
-    {
-      for (i = len - 1; i > 0; --i)
-	{
-	  outbuf[i] = (c & 0x3f) | 0x80;
-	  c >>= 6;
-	}
-      outbuf[0] = c | first;
-    }
-
-  return len;
-}
-
-/*
- * g_utf8_to_ucs4_fast:
- * @str: a UTF-8 encoded string
- * @len: the maximum length of @str to use. If @len < 0, then
- *       the string is nul-terminated.
- * @items_written: location to store the number of characters in the
- *                 result, or %NULL.
- *
- * Convert a string from UTF-8 to a 32-bit fixed width
- * representation as UCS-4, assuming valid UTF-8 input.
- * This function is roughly twice as fast as g_utf8_to_ucs4()
- * but does no error checking on the input.
- *
- * Return value: a pointer to a newly allocated UCS-4 string.
- *               This value must be freed with g_free().
- **/
-static gunichar *
-g_utf8_to_ucs4_fast (const gchar * str, glong len, glong * items_written)
-{
-  gint j, charlen;
-  gunichar *result;
-  gint n_chars, i;
-  const gchar *p;
-
-  g_return_val_if_fail (str != NULL, NULL);
-
-  p = str;
-  n_chars = 0;
-  if (len < 0)
-    {
-      while (*p)
-	{
-	  p = g_utf8_next_char (p);
-	  ++n_chars;
-	}
-    }
-  else
-    {
-      while (p < str + len && *p)
-	{
-	  p = g_utf8_next_char (p);
-	  ++n_chars;
-	}
-    }
-
-  result = g_new (gunichar, n_chars + 1);
-  if (!result)
-    return NULL;
-
-  p = str;
-  for (i = 0; i < n_chars; i++)
-    {
-      gunichar wc = ((unsigned char *) p)[0];
-
-      if (wc < 0x80)
-	{
-	  result[i] = wc;
-	  p++;
-	}
-      else
-	{
-	  if (wc < 0xe0)
-	    {
-	      charlen = 2;
-	      wc &= 0x1f;
-	    }
-	  else if (wc < 0xf0)
-	    {
-	      charlen = 3;
-	      wc &= 0x0f;
-	    }
-	  else if (wc < 0xf8)
-	    {
-	      charlen = 4;
-	      wc &= 0x07;
-	    }
-	  else if (wc < 0xfc)
-	    {
-	      charlen = 5;
-	      wc &= 0x03;
-	    }
-	  else
-	    {
-	      charlen = 6;
-	      wc &= 0x01;
-	    }
-
-	  for (j = 1; j < charlen; j++)
-	    {
-	      wc <<= 6;
-	      wc |= ((unsigned char *) p)[j] & 0x3f;
-	    }
-
-	  result[i] = wc;
-	  p += charlen;
-	}
-    }
-  result[i] = 0;
-
-  if (items_written)
-    *items_written = i;
-
-  return result;
-}
-
-/*
- * g_ucs4_to_utf8:
- * @str: a UCS-4 encoded string
- * @len: the maximum length of @str to use. If @len < 0, then
- *       the string is terminated with a 0 character.
- * @items_read: location to store number of characters read read, or %NULL.
- * @items_written: location to store number of bytes written or %NULL.
- *                 The value here stored does not include the trailing 0
- *                 byte.
- * @error: location to store the error occuring, or %NULL to ignore
- *         errors. Any of the errors in #GConvertError other than
- *         %G_CONVERT_ERROR_NO_CONVERSION may occur.
- *
- * Convert a string from a 32-bit fixed width representation as UCS-4.
- * to UTF-8. The result will be terminated with a 0 byte.
- *
- * Return value: a pointer to a newly allocated UTF-8 string.
- *               This value must be freed with g_free(). If an
- *               error occurs, %NULL will be returned and
- *               @error set.
- **/
-static gchar *
-g_ucs4_to_utf8 (const gunichar * str,
-		glong len,
-		glong * items_read, glong * items_written, GError ** error)
-{
-  gint result_length;
-  gchar *result = NULL;
-  gchar *p;
-  gint i;
-
-  result_length = 0;
-  for (i = 0; len < 0 || i < len; i++)
-    {
-      if (!str[i])
-	break;
-
-      if (str[i] >= 0x80000000)
-	{
-	  if (items_read)
-	    *items_read = i;
-
-	  g_set_error (error, G_CONVERT_ERROR,
-		       G_CONVERT_ERROR_ILLEGAL_SEQUENCE,
-		       _("Character out of range for UTF-8"));
-	  goto err_out;
-	}
-
-      result_length += UTF8_LENGTH (str[i]);
-    }
-
-  result = g_malloc (result_length + 1);
-  if (!result)
-    return NULL;
-  p = result;
-
-  i = 0;
-  while (p < result + result_length)
-    p += g_unichar_to_utf8 (str[i++], p);
-
-  *p = '\0';
-
-  if (items_written)
-    *items_written = p - result;
-
-err_out:
-  if (items_read)
-    *items_read = i;
-
-  return result;
-}
-
-/* Code from GLIB gunidecomp.c starts here. */
-
-#include "gunidecomp.h"
-#include "gunicomp.h"
-
-#define CC_PART1(Page, Char) \
-  ((combining_class_table_part1[Page] >= G_UNICODE_MAX_TABLE_INDEX) \
-   ? (combining_class_table_part1[Page] - G_UNICODE_MAX_TABLE_INDEX) \
-   : (cclass_data[combining_class_table_part1[Page]][Char]))
-
-#define CC_PART2(Page, Char) \
-  ((combining_class_table_part2[Page] >= G_UNICODE_MAX_TABLE_INDEX) \
-   ? (combining_class_table_part2[Page] - G_UNICODE_MAX_TABLE_INDEX) \
-   : (cclass_data[combining_class_table_part2[Page]][Char]))
-
-#define COMBINING_CLASS(Char) \
-  (((Char) <= G_UNICODE_LAST_CHAR_PART1) \
-   ? CC_PART1 ((Char) >> 8, (Char) & 0xff) \
-   : (((Char) >= 0xe0000 && (Char) <= G_UNICODE_LAST_CHAR) \
-      ? CC_PART2 (((Char) - 0xe0000) >> 8, (Char) & 0xff) \
-      : 0))
-
-/* constants for hangul syllable [de]composition */
-#define SBase 0xAC00
-#define LBase 0x1100
-#define VBase 0x1161
-#define TBase 0x11A7
-#define LCount 19
-#define VCount 21
-#define TCount 28
-#define NCount (VCount * TCount)
-#define SCount (LCount * NCount)
-
-/*
- * g_unicode_canonical_ordering:
- * @string: a UCS-4 encoded string.
- * @len: the maximum length of @string to use.
- *
- * Computes the canonical ordering of a string in-place.
- * This rearranges decomposed characters in the string
- * according to their combining classes.  See the Unicode
- * manual for more information.
- **/
-static void
-g_unicode_canonical_ordering (gunichar * string, gsize len)
-{
-  gsize i;
-  int swap = 1;
-
-  while (swap)
-    {
-      int last;
-      swap = 0;
-      last = COMBINING_CLASS (string[0]);
-      for (i = 0; i < len - 1; ++i)
-	{
-	  int next = COMBINING_CLASS (string[i + 1]);
-	  if (next != 0 && last > next)
-	    {
-	      gsize j;
-	      /* Percolate item leftward through string.  */
-	      for (j = i + 1; j > 0; --j)
-		{
-		  gunichar t;
-		  if (COMBINING_CLASS (string[j - 1]) <= next)
-		    break;
-		  t = string[j];
-		  string[j] = string[j - 1];
-		  string[j - 1] = t;
-		  swap = 1;
-		}
-	      /* We're re-entering the loop looking at the old
-	         character again.  */
-	      next = last;
-	    }
-	  last = next;
-	}
-    }
-}
-
-/* http://www.unicode.org/unicode/reports/tr15/#Hangul
- * r should be null or have sufficient space. Calling with r == NULL will
- * only calculate the result_len; however, a buffer with space for three
- * characters will always be big enough. */
-static void
-decompose_hangul (gunichar s, gunichar * r, gsize * result_len)
-{
-  gint SIndex = s - SBase;
-
-  /* not a hangul syllable */
-  if (SIndex < 0 || SIndex >= SCount)
-    {
-      if (r)
-	r[0] = s;
-      *result_len = 1;
-    }
-  else
-    {
-      gunichar L = LBase + SIndex / NCount;
-      gunichar V = VBase + (SIndex % NCount) / TCount;
-      gunichar T = TBase + SIndex % TCount;
-
-      if (r)
-	{
-	  r[0] = L;
-	  r[1] = V;
-	}
-
-      if (T != TBase)
-	{
-	  if (r)
-	    r[2] = T;
-	  *result_len = 3;
-	}
-      else
-	*result_len = 2;
-    }
-}
-
-/* returns a pointer to a null-terminated UTF-8 string */
-static const gchar *
-find_decomposition (gunichar ch, gboolean compat)
-{
-  int start = 0;
-  int end = G_N_ELEMENTS (decomp_table);
-
-  if (ch >= decomp_table[start].ch && ch <= decomp_table[end - 1].ch)
-    {
-      while (TRUE)
-	{
-	  int half = (start + end) / 2;
-	  if (ch == decomp_table[half].ch)
-	    {
-	      int offset;
-
-	      if (compat)
-		{
-		  offset = decomp_table[half].compat_offset;
-		  if (offset == G_UNICODE_NOT_PRESENT_OFFSET)
-		    offset = decomp_table[half].canon_offset;
-		}
-	      else
-		{
-		  offset = decomp_table[half].canon_offset;
-		  if (offset == G_UNICODE_NOT_PRESENT_OFFSET)
-		    return NULL;
-		}
-
-	      return &(decomp_expansion_string[offset]);
-	    }
-	  else if (half == start)
-	    break;
-	  else if (ch > decomp_table[half].ch)
-	    start = half;
-	  else
-	    end = half;
-	}
-    }
-
-  return NULL;
-}
-
-/* L,V => LV and LV,T => LVT  */
-static gboolean
-combine_hangul (gunichar a, gunichar b, gunichar * result)
-{
-  gint LIndex = a - LBase;
-  gint SIndex = a - SBase;
-
-  gint VIndex = b - VBase;
-  gint TIndex = b - TBase;
-
-  if (0 <= LIndex && LIndex < LCount && 0 <= VIndex && VIndex < VCount)
-    {
-      *result = SBase + (LIndex * VCount + VIndex) * TCount;
-      return TRUE;
-    }
-  else if (0 <= SIndex && SIndex < SCount && (SIndex % TCount) == 0
-	   && 0 <= TIndex && TIndex <= TCount)
-    {
-      *result = a + TIndex;
-      return TRUE;
-    }
-
-  return FALSE;
-}
-
-#define CI(Page, Char) \
-  ((compose_table[Page] >= G_UNICODE_MAX_TABLE_INDEX) \
-   ? (compose_table[Page] - G_UNICODE_MAX_TABLE_INDEX) \
-   : (compose_data[compose_table[Page]][Char]))
-
-#define COMPOSE_INDEX(Char) \
-     ((((Char) >> 8) > (COMPOSE_TABLE_LAST)) ? 0 : CI((Char) >> 8, (Char) & 0xff))
-
-static gboolean
-combine (gunichar a, gunichar b, gunichar * result)
-{
-  gushort index_a, index_b;
-
-  if (combine_hangul (a, b, result))
-    return TRUE;
-
-  index_a = COMPOSE_INDEX (a);
-
-  if (index_a >= COMPOSE_FIRST_SINGLE_START && index_a < COMPOSE_SECOND_START)
-    {
-      if (b == compose_first_single[index_a - COMPOSE_FIRST_SINGLE_START][0])
-	{
-	  *result =
-	    compose_first_single[index_a - COMPOSE_FIRST_SINGLE_START][1];
-	  return TRUE;
-	}
-      else
-	return FALSE;
-    }
-
-  index_b = COMPOSE_INDEX (b);
-
-  if (index_b >= COMPOSE_SECOND_SINGLE_START)
-    {
-      if (a ==
-	  compose_second_single[index_b - COMPOSE_SECOND_SINGLE_START][0])
-	{
-	  *result =
-	    compose_second_single[index_b - COMPOSE_SECOND_SINGLE_START][1];
-	  return TRUE;
-	}
-      else
-	return FALSE;
-    }
-
-  if (index_a >= COMPOSE_FIRST_START && index_a < COMPOSE_FIRST_SINGLE_START
-      && index_b >= COMPOSE_SECOND_START
-      && index_b < COMPOSE_SECOND_SINGLE_START)
-    {
-      gunichar res =
-	compose_array[index_a - COMPOSE_FIRST_START][index_b -
-						     COMPOSE_SECOND_START];
-
-      if (res)
-	{
-	  *result = res;
-	  return TRUE;
-	}
-    }
-
-  return FALSE;
-}
-
-static gunichar *
-_g_utf8_normalize_wc (const gchar * str, gssize max_len, GNormalizeMode mode)
-{
-  gsize n_wc;
-  gunichar *wc_buffer;
-  const char *p;
-  gsize last_start;
-  gboolean do_compat = (mode == G_NORMALIZE_NFKC || mode == G_NORMALIZE_NFKD);
-  gboolean do_compose = (mode == G_NORMALIZE_NFC || mode == G_NORMALIZE_NFKC);
-
-  n_wc = 0;
-  p = str;
-  while ((max_len < 0 || p < str + max_len) && *p)
-    {
-      const gchar *decomp;
-      gunichar wc = g_utf8_get_char (p);
-
-      if (wc >= 0xac00 && wc <= 0xd7af)
-	{
-	  gsize result_len;
-	  decompose_hangul (wc, NULL, &result_len);
-	  n_wc += result_len;
-	}
-      else
-	{
-	  decomp = find_decomposition (wc, do_compat);
-
-	  if (decomp)
-	    n_wc += g_utf8_strlen (decomp, -1);
-	  else
-	    n_wc++;
-	}
-
-      p = g_utf8_next_char (p);
-    }
-
-  wc_buffer = g_new (gunichar, n_wc + 1);
-  if (!wc_buffer)
-    return NULL;
-
-  last_start = 0;
-  n_wc = 0;
-  p = str;
-  while ((max_len < 0 || p < str + max_len) && *p)
-    {
-      gunichar wc = g_utf8_get_char (p);
-      const gchar *decomp;
-      int cc;
-      gsize old_n_wc = n_wc;
-
-      if (wc >= 0xac00 && wc <= 0xd7af)
-	{
-	  gsize result_len;
-	  decompose_hangul (wc, wc_buffer + n_wc, &result_len);
-	  n_wc += result_len;
-	}
-      else
-	{
-	  decomp = find_decomposition (wc, do_compat);
-
-	  if (decomp)
-	    {
-	      const char *pd;
-	      for (pd = decomp; *pd != '\0'; pd = g_utf8_next_char (pd))
-		wc_buffer[n_wc++] = g_utf8_get_char (pd);
-	    }
-	  else
-	    wc_buffer[n_wc++] = wc;
-	}
-
-      if (n_wc > 0)
-	{
-	  cc = COMBINING_CLASS (wc_buffer[old_n_wc]);
-
-	  if (cc == 0)
-	    {
-	      g_unicode_canonical_ordering (wc_buffer + last_start,
-					    n_wc - last_start);
-	      last_start = old_n_wc;
-	    }
-	}
-
-      p = g_utf8_next_char (p);
-    }
-
-  if (n_wc > 0)
-    {
-      g_unicode_canonical_ordering (wc_buffer + last_start,
-				    n_wc - last_start);
-      last_start = n_wc;
-    }
-
-  wc_buffer[n_wc] = 0;
-
-  /* All decomposed and reordered */
-
-  if (do_compose && n_wc > 0)
-    {
-      gsize i, j;
-      int last_cc = 0;
-      last_start = 0;
-
-      for (i = 0; i < n_wc; i++)
-	{
-	  int cc = COMBINING_CLASS (wc_buffer[i]);
-
-	  if (i > 0 &&
-	      (last_cc == 0 || last_cc != cc) &&
-	      combine (wc_buffer[last_start], wc_buffer[i],
-		       &wc_buffer[last_start]))
-	    {
-	      for (j = i + 1; j < n_wc; j++)
-		wc_buffer[j - 1] = wc_buffer[j];
-	      n_wc--;
-	      i--;
-
-	      if (i == last_start)
-		last_cc = 0;
-	      else
-		last_cc = COMBINING_CLASS (wc_buffer[i - 1]);
-
-	      continue;
-	    }
-
-	  if (cc == 0)
-	    last_start = i;
-
-	  last_cc = cc;
-	}
-    }
-
-  wc_buffer[n_wc] = 0;
-
-  return wc_buffer;
-}
-
-/*
- * g_utf8_normalize:
- * @str: a UTF-8 encoded string.
- * @len: length of @str, in bytes, or -1 if @str is nul-terminated.
- * @mode: the type of normalization to perform.
- *
- * Converts a string into canonical form, standardizing
- * such issues as whether a character with an accent
- * is represented as a base character and combining
- * accent or as a single precomposed character. You
- * should generally call g_utf8_normalize() before
- * comparing two Unicode strings.
- *
- * The normalization mode %G_NORMALIZE_DEFAULT only
- * standardizes differences that do not affect the
- * text content, such as the above-mentioned accent
- * representation. %G_NORMALIZE_ALL also standardizes
- * the "compatibility" characters in Unicode, such
- * as SUPERSCRIPT THREE to the standard forms
- * (in this case DIGIT THREE). Formatting information
- * may be lost but for most text operations such
- * characters should be considered the same.
- * For example, g_utf8_collate() normalizes
- * with %G_NORMALIZE_ALL as its first step.
- *
- * %G_NORMALIZE_DEFAULT_COMPOSE and %G_NORMALIZE_ALL_COMPOSE
- * are like %G_NORMALIZE_DEFAULT and %G_NORMALIZE_ALL,
- * but returned a result with composed forms rather
- * than a maximally decomposed form. This is often
- * useful if you intend to convert the string to
- * a legacy encoding or pass it to a system with
- * less capable Unicode handling.
- *
- * Return value: a newly allocated string, that is the
- *   normalized form of @str.
- **/
-static gchar *
-g_utf8_normalize (const gchar * str, gssize len, GNormalizeMode mode)
-{
-  gunichar *result_wc = _g_utf8_normalize_wc (str, len, mode);
-  gchar *result;
-
-  result = g_ucs4_to_utf8 (result_wc, -1, NULL, NULL, NULL);
-  g_free (result_wc);
-
-  return result;
-}
-
-/* Public Libidn API starts here. */
-
-/**
- * stringprep_utf8_to_unichar:
- * @p: a pointer to Unicode character encoded as UTF-8
- *
- * Converts a sequence of bytes encoded as UTF-8 to a Unicode character.
- * If @p does not point to a valid UTF-8 encoded character, results are
- * undefined.
- *
- * Return value: the resulting character.
- **/
-uint32_t
-stringprep_utf8_to_unichar (const char *p)
-{
-  return g_utf8_get_char (p);
-}
-
-/**
- * stringprep_unichar_to_utf8:
- * @c: a ISO10646 character code
- * @outbuf: output buffer, must have at least 6 bytes of space.
- *       If %NULL, the length will be computed and returned
- *       and nothing will be written to @outbuf.
- *
- * Converts a single character to UTF-8.
- *
- * Return value: number of bytes written.
- **/
-int
-stringprep_unichar_to_utf8 (uint32_t c, char *outbuf)
-{
-  return g_unichar_to_utf8 (c, outbuf);
-}
-
-/**
- * stringprep_utf8_to_ucs4:
- * @str: a UTF-8 encoded string
- * @len: the maximum length of @str to use. If @len < 0, then
- *       the string is nul-terminated.
- * @items_written: location to store the number of characters in the
- *                 result, or %NULL.
- *
- * Convert a string from UTF-8 to a 32-bit fixed width
- * representation as UCS-4, assuming valid UTF-8 input.
- * This function does no error checking on the input.
- *
- * Return value: a pointer to a newly allocated UCS-4 string.
- *               This value must be freed with free().
- **/
-uint32_t *
-stringprep_utf8_to_ucs4 (const char *str, ssize_t len, size_t * items_written)
-{
-  return g_utf8_to_ucs4_fast (str, (glong) len, (glong *) items_written);
-}
-
-/**
- * stringprep_ucs4_to_utf8:
- * @str: a UCS-4 encoded string
- * @len: the maximum length of @str to use. If @len < 0, then
- *       the string is terminated with a 0 character.
- * @items_read: location to store number of characters read read, or %NULL.
- * @items_written: location to store number of bytes written or %NULL.
- *                 The value here stored does not include the trailing 0
- *                 byte.
- *
- * Convert a string from a 32-bit fixed width representation as UCS-4.
- * to UTF-8. The result will be terminated with a 0 byte.
- *
- * Return value: a pointer to a newly allocated UTF-8 string.
- *               This value must be freed with free(). If an
- *               error occurs, %NULL will be returned and
- *               @error set.
- **/
-char *
-stringprep_ucs4_to_utf8 (const uint32_t * str, ssize_t len,
-			 size_t * items_read, size_t * items_written)
-{
-  return g_ucs4_to_utf8 (str, len, (glong *) items_read,
-			 (glong *) items_written, NULL);
-}
-
-/**
- * stringprep_utf8_nfkc_normalize:
- * @str: a UTF-8 encoded string.
- * @len: length of @str, in bytes, or -1 if @str is nul-terminated.
- *
- * Converts a string into canonical form, standardizing
- * such issues as whether a character with an accent
- * is represented as a base character and combining
- * accent or as a single precomposed character.
- *
- * The normalization mode is NFKC (ALL COMPOSE).  It standardizes
- * differences that do not affect the text content, such as the
- * above-mentioned accent representation. It standardizes the
- * "compatibility" characters in Unicode, such as SUPERSCRIPT THREE to
- * the standard forms (in this case DIGIT THREE). Formatting
- * information may be lost but for most text operations such
- * characters should be considered the same. It returns a result with
- * composed forms rather than a maximally decomposed form.
- *
- * Return value: a newly allocated string, that is the
- *   NFKC normalized form of @str.
- **/
-char *
-stringprep_utf8_nfkc_normalize (const char *str, ssize_t len)
-{
-  return g_utf8_normalize (str, len, G_NORMALIZE_NFKC);
-}
-
-/**
- * stringprep_ucs4_nfkc_normalize:
- * @str: a Unicode string.
- * @len: length of @str array, or -1 if @str is nul-terminated.
- *
- * Converts UCS4 string into UTF-8 and runs
- * stringprep_utf8_nfkc_normalize().
- *
- * Return value: a newly allocated Unicode string, that is the NFKC
- *   normalized form of @str.
- **/
-uint32_t *
-stringprep_ucs4_nfkc_normalize (uint32_t * str, ssize_t len)
-{
-  char *p;
-  uint32_t *result_wc;
-
-  p = stringprep_ucs4_to_utf8 (str, len, 0, 0);
-  result_wc = _g_utf8_normalize_wc (p, -1, G_NORMALIZE_NFKC);
-  free (p);
-
-  return result_wc;
-}