/* gunicode.h - Unicode manipulation functions
 *
 *  Copyright (C) 1999, 2000 Tom Tromey
 *  Copyright 2000, 2005 Red Hat, Inc.
 *
 * The Gnome 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 of the
 * License, or (at your option) any later version.
 *
 * The Gnome 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 Gnome Library; see the file COPYING.LIB.  If not,
 * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 *   Boston, MA 02111-1307, USA.
 */

#ifndef __G_UNICODE_H__
#define __G_UNICODE_H__

#include <glib/gerror.h>
#include <glib/gtypes.h>

G_BEGIN_DECLS

typedef guint32 gunichar;
typedef guint16 gunichar2;

/* These are the possible character classifications.
 * See http://www.unicode.org/Public/UNIDATA/UCD.html#General_Category_Values
 */
typedef enum
{
  G_UNICODE_CONTROL,
  G_UNICODE_FORMAT,
  G_UNICODE_UNASSIGNED,
  G_UNICODE_PRIVATE_USE,
  G_UNICODE_SURROGATE,
  G_UNICODE_LOWERCASE_LETTER,
  G_UNICODE_MODIFIER_LETTER,
  G_UNICODE_OTHER_LETTER,
  G_UNICODE_TITLECASE_LETTER,
  G_UNICODE_UPPERCASE_LETTER,
  G_UNICODE_COMBINING_MARK,
  G_UNICODE_ENCLOSING_MARK,
  G_UNICODE_NON_SPACING_MARK,
  G_UNICODE_DECIMAL_NUMBER,
  G_UNICODE_LETTER_NUMBER,
  G_UNICODE_OTHER_NUMBER,
  G_UNICODE_CONNECT_PUNCTUATION,
  G_UNICODE_DASH_PUNCTUATION,
  G_UNICODE_CLOSE_PUNCTUATION,
  G_UNICODE_FINAL_PUNCTUATION,
  G_UNICODE_INITIAL_PUNCTUATION,
  G_UNICODE_OTHER_PUNCTUATION,
  G_UNICODE_OPEN_PUNCTUATION,
  G_UNICODE_CURRENCY_SYMBOL,
  G_UNICODE_MODIFIER_SYMBOL,
  G_UNICODE_MATH_SYMBOL,
  G_UNICODE_OTHER_SYMBOL,
  G_UNICODE_LINE_SEPARATOR,
  G_UNICODE_PARAGRAPH_SEPARATOR,
  G_UNICODE_SPACE_SEPARATOR
} GUnicodeType;

/* These are the possible line break classifications.
 * Note that new types may be added in the future.
 * Implementations may regard unknown values like G_UNICODE_BREAK_UNKNOWN
 * See http://www.unicode.org/unicode/reports/tr14/
 */
typedef enum
{
  G_UNICODE_BREAK_MANDATORY,
  G_UNICODE_BREAK_CARRIAGE_RETURN,
  G_UNICODE_BREAK_LINE_FEED,
  G_UNICODE_BREAK_COMBINING_MARK,
  G_UNICODE_BREAK_SURROGATE,
  G_UNICODE_BREAK_ZERO_WIDTH_SPACE,
  G_UNICODE_BREAK_INSEPARABLE,
  G_UNICODE_BREAK_NON_BREAKING_GLUE,
  G_UNICODE_BREAK_CONTINGENT,
  G_UNICODE_BREAK_SPACE,
  G_UNICODE_BREAK_AFTER,
  G_UNICODE_BREAK_BEFORE,
  G_UNICODE_BREAK_BEFORE_AND_AFTER,
  G_UNICODE_BREAK_HYPHEN,
  G_UNICODE_BREAK_NON_STARTER,
  G_UNICODE_BREAK_OPEN_PUNCTUATION,
  G_UNICODE_BREAK_CLOSE_PUNCTUATION,
  G_UNICODE_BREAK_QUOTATION,
  G_UNICODE_BREAK_EXCLAMATION,
  G_UNICODE_BREAK_IDEOGRAPHIC,
  G_UNICODE_BREAK_NUMERIC,
  G_UNICODE_BREAK_INFIX_SEPARATOR,
  G_UNICODE_BREAK_SYMBOL,
  G_UNICODE_BREAK_ALPHABETIC,
  G_UNICODE_BREAK_PREFIX,
  G_UNICODE_BREAK_POSTFIX,
  G_UNICODE_BREAK_COMPLEX_CONTEXT,
  G_UNICODE_BREAK_AMBIGUOUS,
  G_UNICODE_BREAK_UNKNOWN,
  G_UNICODE_BREAK_NEXT_LINE,
  G_UNICODE_BREAK_WORD_JOINER,
  G_UNICODE_BREAK_HANGUL_L_JAMO,
  G_UNICODE_BREAK_HANGUL_V_JAMO,
  G_UNICODE_BREAK_HANGUL_T_JAMO,
  G_UNICODE_BREAK_HANGUL_LV_SYLLABLE,
  G_UNICODE_BREAK_HANGUL_LVT_SYLLABLE
} GUnicodeBreakType;

typedef enum 
{                         /* ISO 15924 code */
  G_UNICODE_SCRIPT_INVALID_CODE = -1,
  G_UNICODE_SCRIPT_COMMON       = 0,   /* Zyyy */
  G_UNICODE_SCRIPT_INHERITED,          /* Qaai */
  G_UNICODE_SCRIPT_ARABIC,             /* Arab */
  G_UNICODE_SCRIPT_ARMENIAN,           /* Armn */
  G_UNICODE_SCRIPT_BENGALI,            /* Beng */
  G_UNICODE_SCRIPT_BOPOMOFO,           /* Bopo */
  G_UNICODE_SCRIPT_CHEROKEE,           /* Cher */
  G_UNICODE_SCRIPT_COPTIC,             /* Qaac */
  G_UNICODE_SCRIPT_CYRILLIC,           /* Cyrl (Cyrs) */
  G_UNICODE_SCRIPT_DESERET,            /* Dsrt */
  G_UNICODE_SCRIPT_DEVANAGARI,         /* Deva */
  G_UNICODE_SCRIPT_ETHIOPIC,           /* Ethi */
  G_UNICODE_SCRIPT_GEORGIAN,           /* Geor (Geon, Geoa) */
  G_UNICODE_SCRIPT_GOTHIC,             /* Goth */
  G_UNICODE_SCRIPT_GREEK,              /* Grek */
  G_UNICODE_SCRIPT_GUJARATI,           /* Gujr */
  G_UNICODE_SCRIPT_GURMUKHI,           /* Guru */
  G_UNICODE_SCRIPT_HAN,                /* Hani */
  G_UNICODE_SCRIPT_HANGUL,             /* Hang */
  G_UNICODE_SCRIPT_HEBREW,             /* Hebr */
  G_UNICODE_SCRIPT_HIRAGANA,           /* Hira */
  G_UNICODE_SCRIPT_KANNADA,            /* Knda */
  G_UNICODE_SCRIPT_KATAKANA,           /* Kana */
  G_UNICODE_SCRIPT_KHMER,              /* Khmr */
  G_UNICODE_SCRIPT_LAO,                /* Laoo */
  G_UNICODE_SCRIPT_LATIN,              /* Latn (Latf, Latg) */
  G_UNICODE_SCRIPT_MALAYALAM,          /* Mlym */
  G_UNICODE_SCRIPT_MONGOLIAN,          /* Mong */
  G_UNICODE_SCRIPT_MYANMAR,            /* Mymr */
  G_UNICODE_SCRIPT_OGHAM,              /* Ogam */
  G_UNICODE_SCRIPT_OLD_ITALIC,         /* Ital */
  G_UNICODE_SCRIPT_ORIYA,              /* Orya */
  G_UNICODE_SCRIPT_RUNIC,              /* Runr */
  G_UNICODE_SCRIPT_SINHALA,            /* Sinh */
  G_UNICODE_SCRIPT_SYRIAC,             /* Syrc (Syrj, Syrn, Syre) */
  G_UNICODE_SCRIPT_TAMIL,              /* Taml */
  G_UNICODE_SCRIPT_TELUGU,             /* Telu */
  G_UNICODE_SCRIPT_THAANA,             /* Thaa */
  G_UNICODE_SCRIPT_THAI,               /* Thai */
  G_UNICODE_SCRIPT_TIBETAN,            /* Tibt */
  G_UNICODE_SCRIPT_CANADIAN_ABORIGINAL, /* Cans */
  G_UNICODE_SCRIPT_YI,                 /* Yiii */
  G_UNICODE_SCRIPT_TAGALOG,            /* Tglg */
  G_UNICODE_SCRIPT_HANUNOO,            /* Hano */
  G_UNICODE_SCRIPT_BUHID,              /* Buhd */
  G_UNICODE_SCRIPT_TAGBANWA,           /* Tagb */

  /* Unicode-4.0 additions */
  G_UNICODE_SCRIPT_BRAILLE,            /* Brai */
  G_UNICODE_SCRIPT_CYPRIOT,            /* Cprt */
  G_UNICODE_SCRIPT_LIMBU,              /* Limb */
  G_UNICODE_SCRIPT_OSMANYA,            /* Osma */
  G_UNICODE_SCRIPT_SHAVIAN,            /* Shaw */
  G_UNICODE_SCRIPT_LINEAR_B,           /* Linb */
  G_UNICODE_SCRIPT_TAI_LE,             /* Tale */
  G_UNICODE_SCRIPT_UGARITIC,           /* Ugar */
      
  /* Unicode-4.1 additions */
  G_UNICODE_SCRIPT_NEW_TAI_LUE,        /* Talu */
  G_UNICODE_SCRIPT_BUGINESE,           /* Bugi */
  G_UNICODE_SCRIPT_GLAGOLITIC,         /* Glag */
  G_UNICODE_SCRIPT_TIFINAGH,           /* Tfng */
  G_UNICODE_SCRIPT_SYLOTI_NAGRI,       /* Sylo */
  G_UNICODE_SCRIPT_OLD_PERSIAN,        /* Xpeo */
  G_UNICODE_SCRIPT_KHAROSHTHI,         /* Khar */

  /* Unicode-5.0 additions */
  G_UNICODE_SCRIPT_UNKNOWN,            /* Zzzz */
  G_UNICODE_SCRIPT_BALINESE,           /* Bali */
  G_UNICODE_SCRIPT_CUNEIFORM,          /* Xsux */
  G_UNICODE_SCRIPT_PHOENICIAN,         /* Phnx */
  G_UNICODE_SCRIPT_PHAGS_PA,           /* Phag */
  G_UNICODE_SCRIPT_NKO                 /* Nkoo */
} GUnicodeScript;

/* Returns TRUE if current locale uses UTF-8 charset.  If CHARSET is
 * not null, sets *CHARSET to the name of the current locale's
 * charset.  This value is statically allocated, and should be copied
 * in case the locale's charset will be changed later using setlocale()
 * or in some other way.
 */
gboolean g_get_charset (G_CONST_RETURN char **charset);

/* These are all analogs of the <ctype.h> functions.
 */
gboolean g_unichar_isalnum   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_isalpha   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_iscntrl   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_isdigit   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_isgraph   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_islower   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_isprint   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_ispunct   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_isspace   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_isupper   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_isxdigit  (gunichar c) G_GNUC_CONST;
gboolean g_unichar_istitle   (gunichar c) G_GNUC_CONST;
gboolean g_unichar_isdefined (gunichar c) G_GNUC_CONST;
gboolean g_unichar_iswide    (gunichar c) G_GNUC_CONST;
gboolean g_unichar_iswide_cjk(gunichar c) G_GNUC_CONST;
gboolean g_unichar_iszerowidth(gunichar c) G_GNUC_CONST;
gboolean g_unichar_ismark    (gunichar c) G_GNUC_CONST;

/* More <ctype.h> functions.  These convert between the three cases.
 * See the Unicode book to understand title case.  */
gunichar g_unichar_toupper (gunichar c) G_GNUC_CONST;
gunichar g_unichar_tolower (gunichar c) G_GNUC_CONST;
gunichar g_unichar_totitle (gunichar c) G_GNUC_CONST;

/* If C is a digit (according to `g_unichar_isdigit'), then return its
   numeric value.  Otherwise return -1.  */
gint g_unichar_digit_value (gunichar c) G_GNUC_CONST;

gint g_unichar_xdigit_value (gunichar c) G_GNUC_CONST;

/* Return the Unicode character type of a given character.  */
GUnicodeType g_unichar_type (gunichar c) G_GNUC_CONST;

/* Return the line break property for a given character */
GUnicodeBreakType g_unichar_break_type (gunichar c) G_GNUC_CONST;

/* Returns the combining class for a given character */
gint g_unichar_combining_class (gunichar uc) G_GNUC_CONST;


/* Compute 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.  */
void g_unicode_canonical_ordering (gunichar *string,
				   gsize     len);

/* Compute canonical decomposition of a character.  Returns g_malloc()d
   string of Unicode characters.  RESULT_LEN is set to the resulting
   length of the string.  */
gunichar *g_unicode_canonical_decomposition (gunichar  ch,
					     gsize    *result_len) G_GNUC_MALLOC;

/* Array of skip-bytes-per-initial character.
 */
GLIB_VAR const gchar * const g_utf8_skip;

#define g_utf8_next_char(p) (char *)((p) + g_utf8_skip[*(const guchar *)(p)])

gunichar g_utf8_get_char           (const gchar  *p) G_GNUC_PURE;
gunichar g_utf8_get_char_validated (const  gchar *p,
				    gssize        max_len) G_GNUC_PURE;

gchar*   g_utf8_offset_to_pointer (const gchar *str,
                                   glong        offset) G_GNUC_PURE;
glong    g_utf8_pointer_to_offset (const gchar *str,      
				   const gchar *pos) G_GNUC_PURE;
gchar*   g_utf8_prev_char         (const gchar *p) G_GNUC_PURE;
gchar*   g_utf8_find_next_char    (const gchar *p,
				   const gchar *end) G_GNUC_PURE;
gchar*   g_utf8_find_prev_char    (const gchar *str,
				   const gchar *p) G_GNUC_PURE;

glong g_utf8_strlen (const gchar *p,  
		     gssize       max) G_GNUC_PURE;

/* Copies n characters from src to dest */
gchar* g_utf8_strncpy (gchar       *dest,
		       const gchar *src,
		       gsize        n);

/* Find the UTF-8 character corresponding to ch, in string p. These
   functions are equivalants to strchr and strrchr */
gchar* g_utf8_strchr  (const gchar *p,
		       gssize       len,
		       gunichar     c);
gchar* g_utf8_strrchr (const gchar *p,
		       gssize       len,
		       gunichar     c);
gchar* g_utf8_strreverse (const gchar *str,
			  gssize len);

gunichar2 *g_utf8_to_utf16     (const gchar      *str,
				glong             len,            
				glong            *items_read,     
				glong            *items_written,  
				GError          **error) G_GNUC_MALLOC;
gunichar * g_utf8_to_ucs4      (const gchar      *str,
				glong             len,            
				glong            *items_read,     
				glong            *items_written,  
				GError          **error) G_GNUC_MALLOC;
gunichar * g_utf8_to_ucs4_fast (const gchar      *str,
				glong             len,            
				glong            *items_written) G_GNUC_MALLOC; 
gunichar * g_utf16_to_ucs4     (const gunichar2  *str,
				glong             len,            
				glong            *items_read,     
				glong            *items_written,  
				GError          **error) G_GNUC_MALLOC;
gchar*     g_utf16_to_utf8     (const gunichar2  *str,
				glong             len,            
				glong            *items_read,     
				glong            *items_written,  
				GError          **error) G_GNUC_MALLOC;
gunichar2 *g_ucs4_to_utf16     (const gunichar   *str,
				glong             len,            
				glong            *items_read,     
				glong            *items_written,  
				GError          **error) G_GNUC_MALLOC;
gchar*     g_ucs4_to_utf8      (const gunichar   *str,
				glong             len,            
				glong            *items_read,     
				glong            *items_written,  
				GError          **error) G_GNUC_MALLOC;

/* Convert a single character into UTF-8. outbuf must have at
 * least 6 bytes of space. Returns the number of bytes in the
 * result.
 */
gint      g_unichar_to_utf8 (gunichar    c,
			     gchar      *outbuf);

/* Validate a UTF8 string, return TRUE if valid, put pointer to
 * first invalid char in **end
 */

gboolean g_utf8_validate (const gchar  *str,
                          gssize        max_len,  
                          const gchar **end);

/* Validate a Unicode character */
gboolean g_unichar_validate (gunichar ch) G_GNUC_CONST;

gchar *g_utf8_strup   (const gchar *str,
		       gssize       len) G_GNUC_MALLOC;
gchar *g_utf8_strdown (const gchar *str,
		       gssize       len) G_GNUC_MALLOC;
gchar *g_utf8_casefold (const gchar *str,
			gssize       len) G_GNUC_MALLOC;

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;

gchar *g_utf8_normalize (const gchar   *str,
			 gssize         len,
			 GNormalizeMode mode) G_GNUC_MALLOC;

gint   g_utf8_collate     (const gchar *str1,
			   const gchar *str2) G_GNUC_PURE;
gchar *g_utf8_collate_key (const gchar *str,
			   gssize       len) G_GNUC_MALLOC;
gchar *g_utf8_collate_key_for_filename (const gchar *str,
			                gssize       len) G_GNUC_MALLOC;

gboolean g_unichar_get_mirror_char (gunichar ch,
                                    gunichar *mirrored_ch);

GUnicodeScript g_unichar_get_script (gunichar ch) G_GNUC_CONST;


/* private */

gchar *_g_utf8_make_valid (const gchar *name);


G_END_DECLS

#endif /* __G_UNICODE_H__ */
