/********************************************************************* unicode.h Unicode related functions This code is for converting between UTF-8, UTF-16, and 32-bit Unicode strings. These functions roughly parallel C runtime library functions like mbtowc() and similar functions, but are specific for these Unicode encodings. Specifically, there are functions that convert UTF-8 and UTF-16 char clusters to and from singular 32-bit Unicode chars. Copyright (c) 1996-2007, Nicola Salmoria and the MAME Team. Visit http://mamedev.org for licensing and usage restrictions. *********************************************************************/ #pragma once #ifndef UNICODE_H #define UNICODE_H #include #include "osdcore.h" /*************************************************************************** CONSTANTS ***************************************************************************/ /* these defines specify the maximum size of different types of Unicode * character encodings */ #define UTF8_CHAR_MAX 6 #define UTF16_CHAR_MAX 2 /* these are UTF-8 encoded strings for common characters */ #define UTF8_NBSP "\xc2\xa0" /* non-breaking space */ #define UTF8_MULTIPLY "\xc3\x97" /* multiplication symbol */ /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ typedef UINT16 utf16_char; typedef UINT32 unicode_char; /*************************************************************************** FUNCTION PROTOTYPES ***************************************************************************/ /* tests to see if a unicode char is a valid code point */ int uchar_isvalid(unicode_char uchar); /* converting strings to 32-bit Unicode chars */ int uchar_from_utf8(unicode_char *uchar, const char *utf8char, size_t count); int uchar_from_utf16(unicode_char *uchar, const utf16_char *utf16char, size_t count); int uchar_from_utf16f(unicode_char *uchar, const utf16_char *utf16char, size_t count); /* converting 32-bit Unicode chars to strings */ int utf8_from_uchar(char *utf8string, size_t count, unicode_char uchar); int utf16_from_uchar(utf16_char *utf16string, size_t count, unicode_char uchar); int utf16f_from_uchar(utf16_char *utf16string, size_t count, unicode_char uchar); /* misc UTF-8 helpers */ const char *utf8_previous_char(const char *utf8string); int utf8_is_valid_string(const char *utf8string); /*************************************************************************** MACROS ***************************************************************************/ #ifdef LSB_FIRST #define uchar_from_utf16be uchar_from_utf16f #define uchar_from_utf16le uchar_from_utf16 #define utf16be_from_uchar utf16f_from_uchar #define utf16le_from_uchar utf16_from_uchar #else #define uchar_from_utf16be uchar_from_utf16 #define uchar_from_utf16le uchar_from_utf16f #define utf16be_from_uchar utf16_from_uchar #define utf16le_from_uchar utf16f_from_uchar #endif #endif /* UNICODE_H */