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https://sourceware.org/git/glibc.git
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1058 lines
25 KiB
C
1058 lines
25 KiB
C
/* nfkc.c Unicode normalization utilities.
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* Copyright (C) 2002, 2003 Simon Josefsson
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*
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* This file is part of GNU Libidn.
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*
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* GNU Libidn is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* GNU Libidn is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with GNU Libidn; if not, see <http://www.gnu.org/licenses/>.
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*/
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#if HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include "stringprep.h"
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/* This file contains functions from GLIB, including gutf8.c and
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* gunidecomp.c, all licensed under LGPL and copyright hold by:
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*
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* Copyright (C) 1999, 2000 Tom Tromey
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* Copyright 2000 Red Hat, Inc.
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*/
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/* Hacks to make syncing with GLIB code easier. */
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#define gboolean int
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#define gchar char
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#define guchar unsigned char
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#define glong long
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#define gint int
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#define guint unsigned int
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#define gushort unsigned short
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#define gint16 int16_t
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#define guint16 uint16_t
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#define gunichar uint32_t
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#define gsize size_t
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#define gssize ssize_t
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#define g_malloc malloc
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#define g_free free
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#define GError void
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#define g_set_error(a,b,c,d) ((void) 0)
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#define g_new(struct_type, n_structs) \
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((struct_type *) g_malloc (((gsize) sizeof (struct_type)) * ((gsize) (n_structs))))
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# if defined (__GNUC__) && !defined (__STRICT_ANSI__) && !defined (__cplusplus)
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# define G_STMT_START (void)(
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# define G_STMT_END )
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# else
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# if (defined (sun) || defined (__sun__))
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# define G_STMT_START if (1)
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# define G_STMT_END else (void)0
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# else
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# define G_STMT_START do
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# define G_STMT_END while (0)
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# endif
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# endif
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#define g_return_val_if_fail(expr,val) G_STMT_START{ (void)0; }G_STMT_END
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#define G_N_ELEMENTS(arr) (sizeof (arr) / sizeof ((arr)[0]))
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#define TRUE 1
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#define FALSE 0
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/* Code from GLIB gunicode.h starts here. */
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typedef enum
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{
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G_NORMALIZE_DEFAULT,
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G_NORMALIZE_NFD = G_NORMALIZE_DEFAULT,
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G_NORMALIZE_DEFAULT_COMPOSE,
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G_NORMALIZE_NFC = G_NORMALIZE_DEFAULT_COMPOSE,
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G_NORMALIZE_ALL,
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G_NORMALIZE_NFKD = G_NORMALIZE_ALL,
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G_NORMALIZE_ALL_COMPOSE,
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G_NORMALIZE_NFKC = G_NORMALIZE_ALL_COMPOSE
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}
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GNormalizeMode;
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/* Code from GLIB gutf8.c starts here. */
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#define UTF8_COMPUTE(Char, Mask, Len) \
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if (Char < 128) \
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{ \
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Len = 1; \
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Mask = 0x7f; \
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} \
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else if ((Char & 0xe0) == 0xc0) \
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{ \
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Len = 2; \
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Mask = 0x1f; \
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} \
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else if ((Char & 0xf0) == 0xe0) \
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{ \
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Len = 3; \
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Mask = 0x0f; \
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} \
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else if ((Char & 0xf8) == 0xf0) \
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{ \
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Len = 4; \
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Mask = 0x07; \
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} \
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else if ((Char & 0xfc) == 0xf8) \
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{ \
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Len = 5; \
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Mask = 0x03; \
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} \
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else if ((Char & 0xfe) == 0xfc) \
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{ \
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Len = 6; \
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Mask = 0x01; \
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} \
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else \
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Len = -1;
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#define UTF8_LENGTH(Char) \
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((Char) < 0x80 ? 1 : \
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((Char) < 0x800 ? 2 : \
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((Char) < 0x10000 ? 3 : \
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((Char) < 0x200000 ? 4 : \
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((Char) < 0x4000000 ? 5 : 6)))))
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#define UTF8_GET(Result, Chars, Count, Mask, Len) \
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(Result) = (Chars)[0] & (Mask); \
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for ((Count) = 1; (Count) < (Len); ++(Count)) \
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{ \
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if (((Chars)[(Count)] & 0xc0) != 0x80) \
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{ \
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(Result) = -1; \
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break; \
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} \
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(Result) <<= 6; \
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(Result) |= ((Chars)[(Count)] & 0x3f); \
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}
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#define UNICODE_VALID(Char) \
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((Char) < 0x110000 && \
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(((Char) & 0xFFFFF800) != 0xD800) && \
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((Char) < 0xFDD0 || (Char) > 0xFDEF) && \
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((Char) & 0xFFFE) != 0xFFFE)
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static const gchar utf8_skip_data[256] = {
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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,
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1, 1, 1, 1, 1, 1, 1,
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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,
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1, 1, 1, 1, 1, 1, 1,
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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,
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1, 1, 1, 1, 1, 1, 1,
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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,
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1, 1, 1, 1, 1, 1, 1,
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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,
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1, 1, 1, 1, 1, 1, 1,
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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,
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1, 1, 1, 1, 1, 1, 1,
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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,
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2, 2, 2, 2, 2, 2, 2,
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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,
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5, 5, 5, 6, 6, 1, 1
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};
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const gchar *const g_utf8_skip = utf8_skip_data;
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#define g_utf8_next_char(p) (char *)((p) + g_utf8_skip[*(guchar *)(p)])
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/*
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* g_utf8_strlen:
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* @p: pointer to the start of a UTF-8 encoded string.
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* @max: the maximum number of bytes to examine. If @max
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* is less than 0, then the string is assumed to be
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* nul-terminated. If @max is 0, @p will not be examined and
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* may be %NULL.
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*
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* Returns the length of the string in characters.
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*
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* Return value: the length of the string in characters
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**/
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static glong
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g_utf8_strlen (const gchar * p, gssize max)
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{
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glong len = 0;
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const gchar *start = p;
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g_return_val_if_fail (p != NULL || max == 0, 0);
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if (max < 0)
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{
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while (*p)
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{
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p = g_utf8_next_char (p);
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++len;
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}
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}
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else
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{
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if (max == 0 || !*p)
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return 0;
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p = g_utf8_next_char (p);
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while (p - start < max && *p)
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{
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++len;
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p = g_utf8_next_char (p);
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}
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/* only do the last len increment if we got a complete
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* char (don't count partial chars)
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*/
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if (p - start == max)
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++len;
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}
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return len;
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}
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/*
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* g_utf8_get_char:
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* @p: a pointer to Unicode character encoded as UTF-8
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*
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* Converts a sequence of bytes encoded as UTF-8 to a Unicode character.
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* If @p does not point to a valid UTF-8 encoded character, results are
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* undefined. If you are not sure that the bytes are complete
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* valid Unicode characters, you should use g_utf8_get_char_validated()
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* instead.
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*
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* Return value: the resulting character
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**/
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static gunichar
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g_utf8_get_char (const gchar * p)
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{
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int i, mask = 0, len;
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gunichar result;
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unsigned char c = (unsigned char) *p;
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UTF8_COMPUTE (c, mask, len);
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if (len == -1)
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return (gunichar) - 1;
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UTF8_GET (result, p, i, mask, len);
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return result;
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}
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/*
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* g_unichar_to_utf8:
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* @c: a ISO10646 character code
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* @outbuf: output buffer, must have at least 6 bytes of space.
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* If %NULL, the length will be computed and returned
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* and nothing will be written to @outbuf.
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*
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* Converts a single character to UTF-8.
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*
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* Return value: number of bytes written
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**/
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static int
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g_unichar_to_utf8 (gunichar c, gchar * outbuf)
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{
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guint len = 0;
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int first;
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int i;
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if (c < 0x80)
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{
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first = 0;
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len = 1;
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}
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else if (c < 0x800)
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{
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first = 0xc0;
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len = 2;
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}
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else if (c < 0x10000)
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{
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first = 0xe0;
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len = 3;
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}
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else if (c < 0x200000)
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{
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first = 0xf0;
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len = 4;
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}
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else if (c < 0x4000000)
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{
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first = 0xf8;
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len = 5;
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}
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else
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{
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first = 0xfc;
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len = 6;
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}
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if (outbuf)
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{
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for (i = len - 1; i > 0; --i)
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{
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outbuf[i] = (c & 0x3f) | 0x80;
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c >>= 6;
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}
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outbuf[0] = c | first;
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}
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return len;
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}
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/*
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* g_utf8_to_ucs4_fast:
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* @str: a UTF-8 encoded string
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* @len: the maximum length of @str to use. If @len < 0, then
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* the string is nul-terminated.
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* @items_written: location to store the number of characters in the
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* result, or %NULL.
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*
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* Convert a string from UTF-8 to a 32-bit fixed width
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* representation as UCS-4, assuming valid UTF-8 input.
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* This function is roughly twice as fast as g_utf8_to_ucs4()
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* but does no error checking on the input.
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*
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* Return value: a pointer to a newly allocated UCS-4 string.
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* This value must be freed with g_free().
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**/
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static gunichar *
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g_utf8_to_ucs4_fast (const gchar * str, glong len, glong * items_written)
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{
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gint j, charlen;
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gunichar *result;
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gint n_chars, i;
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const gchar *p;
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g_return_val_if_fail (str != NULL, NULL);
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p = str;
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n_chars = 0;
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if (len < 0)
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{
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while (*p)
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{
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p = g_utf8_next_char (p);
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++n_chars;
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}
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}
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else
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{
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while (p < str + len && *p)
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{
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p = g_utf8_next_char (p);
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++n_chars;
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}
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}
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result = g_new (gunichar, n_chars + 1);
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if (!result)
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return NULL;
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p = str;
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for (i = 0; i < n_chars; i++)
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{
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gunichar wc = ((unsigned char *) p)[0];
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if (wc < 0x80)
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{
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result[i] = wc;
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p++;
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}
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else
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{
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if (wc < 0xe0)
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{
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charlen = 2;
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wc &= 0x1f;
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}
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else if (wc < 0xf0)
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{
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charlen = 3;
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wc &= 0x0f;
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}
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else if (wc < 0xf8)
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{
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charlen = 4;
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wc &= 0x07;
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}
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else if (wc < 0xfc)
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{
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charlen = 5;
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wc &= 0x03;
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}
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else
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{
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charlen = 6;
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wc &= 0x01;
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}
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for (j = 1; j < charlen; j++)
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{
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wc <<= 6;
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wc |= ((unsigned char *) p)[j] & 0x3f;
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}
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result[i] = wc;
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p += charlen;
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}
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}
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result[i] = 0;
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if (items_written)
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*items_written = i;
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return result;
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}
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|
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/*
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* g_ucs4_to_utf8:
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* @str: a UCS-4 encoded string
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* @len: the maximum length of @str to use. If @len < 0, then
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* the string is terminated with a 0 character.
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* @items_read: location to store number of characters read read, or %NULL.
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* @items_written: location to store number of bytes written or %NULL.
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* The value here stored does not include the trailing 0
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* byte.
|
|
* @error: location to store the error occuring, or %NULL to ignore
|
|
* errors. Any of the errors in #GConvertError other than
|
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* %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
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* @error set.
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**/
|
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static gchar *
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g_ucs4_to_utf8 (const gunichar * str,
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glong len,
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glong * items_read, glong * items_written, GError ** error)
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|
{
|
|
gint result_length;
|
|
gchar *result = NULL;
|
|
gchar *p;
|
|
gint i;
|
|
|
|
result_length = 0;
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|
for (i = 0; len < 0 || i < len; i++)
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|
{
|
|
if (!str[i])
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break;
|
|
|
|
if (str[i] >= 0x80000000)
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|
{
|
|
if (items_read)
|
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*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]);
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|
}
|
|
|
|
result = g_malloc (result_length + 1);
|
|
if (!result)
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|
return NULL;
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|
p = result;
|
|
|
|
i = 0;
|
|
while (p < result + result_length)
|
|
p += g_unichar_to_utf8 (str[i++], p);
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|
|
|
*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]))
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|
|
|
#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;
|
|
}
|