/* * * Created by jief the 24 Feb 2020. * Copyright (c) 2020 Jief * All rights reserved. * */ #include "unicode_conversions.h" #include #ifdef __cplusplus extern "C" { #endif #include // for memcpy //#include // for memcpy //#include #ifndef MIN #define MIN(a, b) ((a) < (b) ? (a) : (b)) #endif #if __WCHAR_MAX__ <= 0xFFFFu #define wchar_cast char16_t #else #define wchar_cast char32_t #endif #ifndef wchar_cast #error wchar_cast #endif // //size_t char32_len_from_wchar(const wchar_t* s) //{ //#if __WCHAR_MAX__ <= 0xFFFFu // return char32_len((const char16_t*)s); //#else // return char32_len((const char32_t*)s); //#endif //} // //size_t wchar_len(const wchar_t* s) //{ //#if __WCHAR_MAX__ <= 0xFFFFu // return char16_len((const char16_t*)s); //#else // return char32_len((const char32_t*)s); //#endif //} static inline int is_surrogate(char16_t uc) { return (uc - 0xd800u) < 2048u; } static inline int is_high_surrogate(char16_t uc) { return (uc & 0xfffffc00) == 0xd800; } static inline int is_low_surrogate(char16_t uc) { return (uc & 0xfffffc00) == 0xdc00; } static inline char32_t surrogate_to_utf32(char16_t high, char16_t low) { return (char32_t)((high << 10) + low - 0x35fdc00); // Safe cast, it fits in 32 bits } #define halfBase 0x0010000UL #define halfMask 0x3FFUL #define halfShift 10 /* used for shifting by 10 bits */ #define UNI_SUR_HIGH_START 0xD800u #define UNI_SUR_LOW_START 0xDC00u /************************************************************* Utility *********************************************************/ /* * Size of an UTF32 char when represented in UTF8 * Return value : size */ size_t utf8_size_of_utf32_char(char32_t c) { if ( c == 0 ) return 0; else if ( c <= 0x7f ) return 1; else if ( c <= 0x7ff ) return 2; else if ( c <= 0xFFFF ) return 3; else return 4; } /* * Size in utf8 char (bytes) of an utf32 string if it were converted to utf8 * Return value : size */ size_t utf8_size_of_utf32_string(const char32_t* s) { if ( !s ) return 0; size_t size = 0; while ( *s ) s = utf8_size_of_utf32_char_ptr(s, &size); return size; } /* * Increment size and return a pointer to the next char * Return value : pointer to the end of string or at the error */ const char32_t* utf8_size_of_utf32_char_ptr(const char32_t *s, size_t* size) { if ( *s == 0 ) return s; *size += utf8_size_of_utf32_char(*s++); return s; } /* * Store an utf32 char in dst, if there is enough room (dst_max_size is >= size of converted utf32 char) * If there is enough room, dst_max_size is decrement and dst is increment and returned * If there isn't enough room, dst_max_size is set to 0 and dst is returned * if utf32_char == 0, it IS sent to dst */ char* get_utf8_from_char32(char* dst, size_t* dst_max_size, char32_t utf32_char) { #ifdef JIEF_DEBUG char* dst_debug = dst; (void)dst_debug; #endif if ( *dst_max_size <= 0 ) return dst; /* assertion: utf32_char is a single UTF-4 value */ int bits = 0; // just to silence the warning if (utf32_char < 0x80) { *dst++ = (char)utf32_char; *dst_max_size -= 1; bits = -6; } else if (utf32_char < 0x800) { if ( *dst_max_size < 2 ) { *dst_max_size = 0; return dst; } *dst++ = (char)(((utf32_char >> 6) & 0x1F) | 0xC0); *dst_max_size -= 1; bits = 0; } else if (utf32_char < 0x10000) { if ( *dst_max_size < 3 ) { *dst_max_size = 0; return dst; } *dst++ = (char)(((utf32_char >> 12) & 0x0F) | 0xE0); *dst_max_size -= 1; bits = 6; } else { if ( *dst_max_size < 4 ) { *dst_max_size = 0; return dst; } *dst++ = (char)(((utf32_char >> 18) & 0x07) | 0xF0); *dst_max_size -= 1; bits = 12; } for ( ; /* *dst_max_size > 0 && */ bits >= 0 ; bits -= 6 ) { // no need to check dst_max_size, it's made before *dst++ = (char)(((utf32_char >> bits) & 0x3F) | 0x80); *dst_max_size -= 1; } return dst; } /* * Store an utf32 char in dst, if there is enough room (dst_max_size is >= size of converted utf32 char) * If there is enough room, dst_max_size is decrement and dst is increment and returned * If there isn't enough room, dst_max_size is set to 0 and dst is returned */ char16_t* get_utf16_from_char32(char16_t* dst, size_t* dst_max_size, char32_t utf32_char) { if ( *dst_max_size <= 0 ) return dst; char16_t char16_1, char16_2; get_char16_from_char32(utf32_char, &char16_1, &char16_2); if ( char16_2 != 0 ) { if ( *dst_max_size < 2 ) { *dst_max_size = 0; }else{ *dst++ = char16_1; *dst++ = char16_2; *dst_max_size -= 2; } }else{ if ( *dst_max_size < 1 ) { *dst_max_size = 0; }else{ *dst++ = char16_1; *dst_max_size -= 1; } } return dst; } /* * Store an utf32 char in dst, if there is enough room (dst_max_size is >= size of converted utf32 char) * If there is enough room, dst_max_size is decrement and dst is increment and returned * If there isn't enough room, dst_max_size is set to 0 and dst is returned */ char32_t* get_utf32_from_char32(char32_t* dst, size_t* dst_max_size, char32_t utf32_char) { if ( *dst_max_size <= 0 ) return dst; *dst = utf32_char; *dst_max_size -= 1; return dst + 1; } /* Number Bits for First Last Byte 1 Byte 2 Byte 3 cByte 4 of bytes code point 1 7 U+0000 U+007F 0xxxxxxx 2 11 U+0080 U+07FF 110xxxxx 10xxxxxx 3 16 U+0800 U+FFFF 1110xxxx 10xxxxxx 10xxxxxx 4 21 U+10000 U+10FFFF[12] 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */ /* * char32 will be set to 0 at the end of string or at error * Return value : pointer to the end of string or at the error */ const char* get_char32_from_utf8_string(const char* s, char32_t* char32) { if ( !*s ) { *char32 = 0; return s; } char32_t c; if (*s & 0x80) { if ((*(s+1) & 0xc0) != 0x80) { // 0xc0 = 0b11000000. Equivalent to if ( *(s+1) != 0x10xxxxxx ) // Finished in the middle of an utf8 multibyte char *char32 = 0; return s; } if ((*s & 0xe0) == 0xe0) { // 0xe0 == 0b11100000. Equivalent to if ( *(s) == 0x111xxxxx ) // Here, it's a 3 or 4 bytes // Byte 3 has to be 0x10xxxxxx if ((*(s+2) & 0xc0) != 0x80) { // 0xc0 = 0b11000000. Equivalent to if ( *(s+2) != 0x10xxxxxx ) // Finished in the middle of an utf8 multibyte char *char32 = 0; return s; } if ((*s & 0xf0) == 0xf0) { // 0xf0 = 0b1111xxxx. Equivalent to if ( *(s) == 0x1111xxxx ) // Here, it's a 4 bytes // Byte 4 has to be 0x10xxxxxx if ((*s & 0xf8) != 0xf0 || (*(s+3) & 0xc0) != 0x80) { // 0xf8 = 0b11111xxx. Equivalent to if ( *(s) != 0x11110xxx || *(s+3) != 0x10xxxxxx ) // Finished in the middle of an utf8 multibyte char *char32 = 0; return s; } /* 4-byte code */ c = (char32_t)((*s & 0x7) << 18); // & result type is int. We know it fits in 32 bits. Safe to cast to char32_t c |= (char32_t)((*(s+1) & 0x3f) << 12); c |= (char32_t)((*(s+2) & 0x3f) << 6); c |= *(s+3) & 0x3f; s += 4; } else { /* 3-byte code */ c = (char32_t)((*s & 0xf) << 12); c |= (char32_t)((*(s+1) & 0x3f) << 6); c |= *(s+2) & 0x3f; s += 3; } } else { /* 2-byte code */ c = (char32_t)((*s & 0x1f) << 6); c |= *(s+1) & 0x3f; s += 2; } } else { /* 1-byte code */ c = (unsigned char)(*s); // in case we compiled with signed char s += 1; } *char32 = c; return s; } /************************************************************* utf8 - char32 *********************************************************/ //const char* utf8_move_forward(const char* s) //{ //} /* * Size in bytes of an utf32 string if it were converted to utf8 * Return value : pointer to the end of string or at the error */ size_t utf32_size_of_utf8_string(const char* s) { if ( !s ) return 0; size_t size = 0; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 ) { size += 1; s = get_char32_from_utf8_string(s, &char32); } return size; } /* * Size in bytes of an utf32 string of len char if it were converted to utf8 * Return value : pointer to the end of string or at the error */ size_t utf8_size_of_utf32_string_len(const char32_t* s, size_t len) { if ( !s || len <= 0 ) return 0; // <= in case size_t is signed size_t size = 0; while ( *s && len > 0 ) { s = utf8_size_of_utf32_char_ptr(s, &size); len --; } return size; } size_t utf32_stringnn_from_utf8_string(char32_t* dst, size_t dst_max_size, const char* s) { if ( dst_max_size <= 0 ) return 0; if ( !s ) { *dst = 0; return 0; } char32_t* p = dst; char32_t* p_max = dst + dst_max_size - 1; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 != 0 ) { *p++ = char32; if ( p > p_max ) break; s = get_char32_from_utf8_string(s, &char32); } return (size_t)(p-dst); } size_t utf32_string_from_utf8_string(char32_t* dst, size_t dst_max_size, const char* s) { if ( dst_max_size <= 0 ) return 0; size_t size = utf32_stringnn_from_utf8_string(dst, dst_max_size, s); if ( size >= dst_max_size ) { *(dst + dst_max_size - 1) = 0; return dst_max_size-1; }else{ *(dst + size) = 0; return size; } } // //size_t utf32_string_from_utf8_string(char32_t* dst, size_t dst_max_size, const char* s) //{ // if ( dst_max_size <= 0 ) return 0; // if ( !s ) { // *dst = 0; // return 0; // } // char32_t* p = dst; // char32_t* p_max = dst + dst_max_size - 1; // // char32_t char32; // s = get_char32_from_utf8_string(s, &char32); // while ( char32 != 0 && p < p_max ) { // *p++ = char32; // s = get_char32_from_utf8_string(s, &char32); // } // *p = 0; // return (size_t)(p-dst); //} size_t utf32_size_of_utf8_string_len(const char* s, size_t len) { if ( !s || len <= 0 ) return 0; // <= in case size_t is signed size_t size = 0; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 && len > 0 ) { size += 1; s = get_char32_from_utf8_string(s, &char32); len --; } return size; } size_t utf32_string_from_utf8_string_len(char32_t* dst, size_t dst_max_size, const char* s, size_t len) { if ( dst_max_size <= 0 ) return 0; if ( !s || len <= 0 ) { *dst = 0; return 0; } char32_t* p = dst; char32_t* p_max = dst + dst_max_size - 1; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 != 0 && p < p_max && len > 0 ) { *p++ = char32; s = get_char32_from_utf8_string(s, &char32); len--; } *p = 0; return (size_t)(p-dst); } size_t utf32_string_from_utf8_string_size(char32_t* dst, size_t dst_max_size, const char* s, size_t size) { if ( dst_max_size == 0 ) return 0; if ( !s || size == 0 ) { *dst = 0; return 0; } char32_t* p = dst; dst_max_size -= 1; const char* s_start = s; char32_t* p_max = dst + dst_max_size; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 && p < p_max && (uintptr_t)(s - s_start) <= size ) { *p++ = char32; s = get_char32_from_utf8_string(s, &char32); } *p = 0; return (size_t)(p-dst); } size_t utf8_stringnn_from_utf32_string(char* dst, size_t dst_max_size, const char32_t *s) { if ( dst_max_size <= 0 ) return 0; if ( !s ) { return 0; } char* p = dst; while ( *s && dst_max_size > 0 ) { p = get_utf8_from_char32(p, &dst_max_size, *s++); } return (size_t)(p-dst); } size_t utf8_string_from_utf32_string(char* dst, size_t dst_max_size, const char32_t *s) { if ( dst_max_size <= 0 ) return 0; size_t size = utf8_stringnn_from_utf32_string(dst, dst_max_size, s); if ( size >= dst_max_size ) { *(dst + dst_max_size - 1) = 0; return dst_max_size-1; }else{ *(dst + size) = 0; return size; } } // //size_t utf8_string_from_utf32_string(char* dst, size_t dst_max_size, const char32_t *s) //{ // if ( dst_max_size <= 0 ) return 0; // if ( !s ) { // *dst = 0; // return 0; // } // dst_max_size -= 1; // char* p = dst; // while ( *s && dst_max_size > 0 ) { // p = get_utf8_from_char32(p, &dst_max_size, *s++); // } // *p = 0; // return (size_t)(p-dst); //} size_t utf8_string_from_utf32_string_len(char* dst, size_t dst_max_size, const char32_t *s, size_t len) { if ( dst_max_size <= 0 ) return 0; if ( !s || len <= 0 ) { *dst = 0; return 0; } dst_max_size -= 1; char* p = dst; while ( *s && dst_max_size > 0 && len > 0 ) { p = get_utf8_from_char32(p, &dst_max_size, *s++); len--; } *p = 0; return (size_t)(p-dst); } size_t utf8_string_from_utf32_string_size(char* dst, size_t dst_max_size, const char32_t *s, size_t size) { if ( dst_max_size <= 0 ) return 0; if ( !s || size <= 0 ) { *dst = 0; return 0; } dst_max_size -= 1; const char32_t* s_start = s; char* p = dst; while ( *s && dst_max_size > 0 && (uintptr_t)(s - s_start) < size ) { p = get_utf8_from_char32(p, &dst_max_size, *s++); } *p = 0; return (size_t)(p-dst); } /* * get nth char32 of an utf8 string * Return value : pointer to the end of string or at the error */ char32_t get_char32_from_utf8_string_at_pos(const char* s, size_t pos) { if ( !s ) return 0; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 && pos > 0 ) { s = get_char32_from_utf8_string(s, &char32); pos--; } return char32; } /************************************************************* utf8 - char16 *********************************************************/ //static size_t utf16_size_of_utf32_char(char32_t c); /* * Increment size * Return value : pointer to the end of string or at the error */ const char16_t* utf8_size_of_utf16_char_ptr(const char16_t *s, size_t* size) { char32_t c; s = get_char32_from_utf16_string(s, &c); if ( c == 0 ) return s; *size += utf8_size_of_utf32_char(c); return s; } /* * Size in bytes of an utf16 string if it were converted to utf8 * Return value : pointer to the end of string or at the error */ size_t utf8_size_of_utf16_string(const char16_t* s) { if ( !s ) return 0; size_t size = 0; while ( *s ) s = utf8_size_of_utf16_char_ptr(s, &size); return size; } /* * Size in bytes of an utf16 string of len char if it were converted to utf8 * Return value : pointer to the end of string or at the error */ size_t utf8_size_of_utf16_string_len(const char16_t* s, size_t len) { if ( !s || len <= 0 ) return 0; // <= in case size_t is signed size_t size = 0; while ( *s && len > 0 ) { s = utf8_size_of_utf16_char_ptr(s, &size); len --; } return size; } size_t utf16_size_of_utf8_string(const char* s) { if ( !s ) return 0; size_t size = 0; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 ) { size += utf16_size_of_utf32_char(char32); s = get_char32_from_utf8_string(s, &char32); } return size; } size_t utf16_size_of_utf8_string_len(const char* s, size_t len) { if ( !s || len <= 0 ) return 0; // <= in case size_t is signed size_t size = 0; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 && len > 0 ) { size += utf16_size_of_utf32_char(char32); len --; s = get_char32_from_utf8_string(s, &char32); } return size; } size_t utf8_stringnn_from_utf16_string(char* dst, size_t dst_max_size, const char16_t *s) { if ( dst_max_size <= 0 ) return 0; if ( !s ) { return 0; } char* p = dst; while ( *s && dst_max_size > 0 ) { char32_t utf32_char; s = get_char32_from_utf16_string(s, &utf32_char); p = get_utf8_from_char32(p, &dst_max_size, utf32_char); } return (size_t)(p-dst); } size_t utf8_string_from_utf16_string(char* dst, size_t dst_max_size, const char16_t *s) { if ( dst_max_size <= 0 ) return 0; size_t size = utf8_stringnn_from_utf16_string(dst, dst_max_size, s); if ( size >= dst_max_size ) { *(dst + dst_max_size - 1) = 0; return dst_max_size-1; }else{ *(dst + size) = 0; return size; } } //size_t utf8_string_from_utf16_string(char* dst, size_t dst_max_size, const char16_t *s) //{ // if ( dst_max_size <= 0 ) return 0; // if ( !s ) { // *dst = 0; // return 0; // } // char* p = dst; // dst_max_size -= 1; // while ( *s && dst_max_size > 0 ) { // char32_t utf32_char; // s = get_char32_from_utf16_string(s, &utf32_char); // p = get_utf8_from_char32(p, &dst_max_size, utf32_char); // } // *p = 0; // return (size_t)(p-dst); //} size_t utf8_string_from_utf16_string_len(char* dst, size_t dst_max_size, const char16_t *s, size_t len) { if ( dst_max_size == 0 ) return 0; if ( dst_max_size == 1 || !s || len <= 0 ) { *dst = 0; return 0; } char* p = dst; dst_max_size -= 1; char32_t utf32_char; while ( *s && dst_max_size > 0 && len > 0 ) { s = get_char32_from_utf16_string(s, &utf32_char); p = get_utf8_from_char32(p, &dst_max_size, utf32_char); len--; } *p = 0; return (size_t)(p-dst); } size_t utf8_string_from_utf16_string_size(char* dst, size_t dst_max_size, const char16_t *s, size_t size) { if ( dst_max_size == 0 ) return 0; if ( dst_max_size == 1 || !s || size <= 0 ) { *dst = 0; return 0; } char* p = dst; dst_max_size -= 1; const char16_t* s_start = s; char32_t char32; s = get_char32_from_utf16_string(s, &char32); while ( char32 && dst_max_size > 0 && (uintptr_t)(s - s_start) <= size ) { p = get_utf8_from_char32(p, &dst_max_size, char32); s = get_char32_from_utf16_string(s, &char32); } *p = 0; return (size_t)(p-dst); } size_t utf16_stringnn_from_utf8_string(char16_t* dst, size_t dst_max_size, const char* s) { if ( dst_max_size <= 0 ) return 0; if ( !s ) { return 0; } // size_t dst_len = 0; char16_t* p = dst; // char16_t* p_max = dst + dst_max_size; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 ) { p = get_utf16_from_char32(p, &dst_max_size, char32); if ( dst_max_size == 0 ) break; s = get_char32_from_utf8_string(s, &char32); } return (size_t)(p-dst); } size_t utf16_string_from_utf8_string(char16_t* dst, size_t dst_max_size, const char* s) { if ( dst_max_size <= 0 ) return 0; size_t size = utf16_stringnn_from_utf8_string(dst, dst_max_size, s); if ( size >= dst_max_size ) { *(dst + dst_max_size - 1) = 0; return dst_max_size-1; }else{ *(dst + size) = 0; return size; } } //size_t utf16_string_from_utf8_string(char16_t* dst, size_t dst_max_size, const char* s) //{ // if ( dst_max_size <= 0 ) return 0; // if ( !s ) { // *dst = 0; // return 0; // } // dst_max_size -= 1; // //// size_t dst_len = 0; // char16_t* p = dst; //// char16_t* p_max = dst + dst_max_size; // // char32_t char32; // s = get_char32_from_utf8_string(s, &char32); // while ( char32 && dst_max_size > 0 ) { // p = get_utf16_from_char32(p, &dst_max_size, char32); // s = get_char32_from_utf8_string(s, &char32); // } // *p = 0; // return (size_t)(p-dst); //} size_t utf16_string_from_utf8_string_len(char16_t* dst, size_t dst_max_size, const char* s, size_t len) { if ( dst_max_size <= 0 ) return 0; if ( !s || len <= 0 ) { *dst = 0; return 0; } dst_max_size -= 1; // size_t dst_len = 0; char16_t* p = dst; // char16_t* p_max = dst + dst_max_size; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 && dst_max_size > 0 && len > 0 ) { p = get_utf16_from_char32(p, &dst_max_size, char32); s = get_char32_from_utf8_string(s, &char32); len--; } *p = 0; return (size_t)(p-dst); } size_t utf16_string_from_utf8_string_size(char16_t* dst, size_t dst_max_size, const char* s, size_t size) { if ( dst_max_size == 0 ) return 0; if ( dst_max_size == 1 || !s || size <= 0 ) { *dst = 0; return 0; } char16_t* p = dst; dst_max_size -= 1; const char* s_start = s; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 && dst_max_size > 0 && (uintptr_t)(s - s_start) <= size ) { p = get_utf16_from_char32(p, &dst_max_size, char32); s = get_char32_from_utf8_string(s, &char32); } *p = 0; return (size_t)(p-dst); } /************************************************************* utf16 - utf32 *********************************************************/ size_t utf16_size_of_utf32_char(char32_t c) { if ( c <= 0xFFFF) return 1; else return 2; } void get_char16_from_char32(char32_t char32, char16_t* char16_1, char16_t* char16_2) { if ( char32 <= 0xFFFF) { *char16_1 = (char16_t)char32; *char16_2 = 0; } else { char32 -= halfBase; *char16_1 = (char16_t)((char32 >> halfShift) + UNI_SUR_HIGH_START); *char16_2 = (char16_t)((char32 & halfMask) + UNI_SUR_LOW_START); } } char32_t get_char32_from_char16(char16_t char16_1, char16_t char16_2) { if (!is_surrogate(char16_1)) { return char16_1; } else { if (is_high_surrogate(char16_1) && is_low_surrogate(char16_2)) { return surrogate_to_utf32(char16_1, char16_2); } else { return 0; } } } /* * char32 will be set to 0 at the end of string or at error * Return value : pointer to the end of string or at the error */ const char16_t* get_char32_from_utf16_string(const char16_t* s, char32_t* char32) { const char16_t char16_1 = *s; if ( char16_1 == 0 ) { *char32 = 0; return s; } s++; if (!is_surrogate(char16_1)) { *char32 = char16_1; return s; } else { if (is_high_surrogate(char16_1) && is_low_surrogate(*s)) { *char32 = surrogate_to_utf32(char16_1, *s++); return s; } else { *char32 = 0; if ( !is_high_surrogate(char16_1) ) return s-1; return s; } } } size_t utf16_size_of_utf32_string(const char32_t *s) { if ( !s ) return 0; size_t size = 0; while ( *s ) size += utf16_size_of_utf32_char(*s++); return size; } size_t utf16_size_of_utf32_string_len(const char32_t *s, size_t len) { if ( !s ) return 0; size_t size = 0; while ( *s && len > 0 ) { size += utf16_size_of_utf32_char(*s++); len--; } return size; } size_t utf32_size_of_utf16_string(const char16_t *s) { if ( !s ) return 0; size_t size = 0; char32_t char32; s = get_char32_from_utf16_string(s, &char32); while ( char32 ) { size += 1; s = get_char32_from_utf16_string(s, &char32); } return size; } size_t utf32_size_of_utf16_string_len(const char16_t *s, size_t len) { if ( !s || len <= 0 ) return 0; // <= in case size_t is signed size_t size = 0; char32_t char32; s = get_char32_from_utf16_string(s, &char32); while ( char32 && len > 0 ) { size += 1; s = get_char32_from_utf16_string(s, &char32); len --; } return size; } size_t utf16_stringnn_from_utf32_string(char16_t* dst, size_t dst_max_size, const char32_t *s) { if ( dst_max_size <= 0 ) return 0; if ( !s ) { return 0; } char16_t* p = dst; // char16_t* p_max = dst + dst_max_size - 1; while ( *s && dst_max_size > 0 ) { p = get_utf16_from_char32(p, &dst_max_size, *s++); } return (size_t)(p-dst); } size_t utf16_string_from_utf32_string(char16_t* dst, size_t dst_max_size, const char32_t *s) { if ( dst_max_size <= 0 ) return 0; size_t size = utf16_stringnn_from_utf32_string(dst, dst_max_size, s); if ( size >= dst_max_size ) { *(dst + dst_max_size - 1) = 0; return dst_max_size-1; }else{ *(dst + size) = 0; return size; } } //size_t utf16_string_from_utf32_string(char16_t* dst, size_t dst_max_size, const char32_t *s) //{ // if ( dst_max_size <= 0 ) return 0; // if ( !s ) { // *dst = 0; // return 0; // } // char16_t* p = dst; //// char16_t* p_max = dst + dst_max_size - 1; // // while ( *s && dst_max_size > 0 ) { // p = get_utf16_from_char32(p, &dst_max_size, *s++); // } // *p = 0; // return (size_t)(p-dst); //} size_t utf16_string_from_utf32_string_len(char16_t* dst, size_t dst_max_size, const char32_t *s, size_t len) { if ( dst_max_size <= 0 ) return 0; if ( !s || len <= 0 ) { *dst = 0; return 0; } char16_t* p = dst; // char16_t* p_max = dst + dst_max_size - 1; dst_max_size--; while ( *s && dst_max_size > 0 && len > 0 ) { p = get_utf16_from_char32(p, &dst_max_size, *s++); len--; } *p = 0; return (size_t)(p-dst); } size_t utf16_string_from_utf32_string_size(char16_t* dst, size_t dst_max_size, const char32_t *s, size_t size) { if ( dst_max_size <= 0 ) return 0; if ( !s || size <= 0 ) { *dst = 0; return 0; } dst_max_size -= 1; const char32_t* s_start = s; char16_t* p = dst; while ( *s && dst_max_size > 0 && (uintptr_t)(s - s_start) < size ) { p = get_utf16_from_char32(p, &dst_max_size, *s++); } *p = 0; return (size_t)(p-dst); } size_t utf32_stringnn_from_utf16_string(char32_t* dst, size_t dst_max_size, const char16_t *s) { if ( dst_max_size <= 0 ) return 0; if ( !s ) return 0; char32_t* p = dst; char32_t* p_max = dst + dst_max_size; char32_t c; while ( *s && p < p_max ) { s = get_char32_from_utf16_string(s, &c); if ( c == 0 ) return (size_t)(p-dst); *p++ = c; } return (size_t)(p-dst); } size_t utf32_string_from_utf16_string(char32_t* dst, size_t dst_max_size, const char16_t *s) { if ( dst_max_size <= 0 ) return 0; size_t size = utf32_stringnn_from_utf16_string(dst, dst_max_size, s); if ( size >= dst_max_size ) { *(dst + dst_max_size - 1) = 0; return dst_max_size-1; }else{ *(dst + size) = 0; return size; } } //size_t utf32_string_from_utf16_string(char32_t* dst, size_t dst_max_size, const char16_t *s) //{ // if ( dst_max_size <= 0 ) return 0; // if ( !s ) { // *dst = 0; // return 0; // } // char32_t* p = dst; // char32_t* p_max = dst + dst_max_size - 1; // // char32_t c; // while ( *s && p < p_max ) { // s = get_char32_from_utf16_string(s, &c); // if ( c == 0 ) return (size_t)(p-dst); // *p++ = c; // } // *p = 0; // return (size_t)(p-dst); //} size_t utf32_string_from_utf16_string_len(char32_t* dst, size_t dst_max_size, const char16_t *s, size_t len) { if ( dst_max_size <= 0 ) return 0; if ( !s || len <= 0 ) { *dst = 0; return 0; } char32_t* p = dst; char32_t* p_max = dst + dst_max_size - 1; char32_t c; while ( *s && p < p_max && len > 0 ) { s = get_char32_from_utf16_string(s, &c); if ( c == 0 ) return (size_t)(p-dst); *p++ = c; len--; } *p = 0; return (size_t)(p-dst); } size_t utf32_string_from_utf16_string_size(char32_t* dst, size_t dst_max_size, const char16_t *s, size_t size) { if ( dst_max_size <= 0 ) return 0; if ( !s || size <= 0 ) { *dst = 0; return 0; } dst_max_size -= 1; const char16_t* s_start = s; char32_t* p = dst; char32_t* p_max = dst + dst_max_size; char32_t char32; s = get_char32_from_utf16_string(s, &char32); while ( char32 != 0 && p < p_max && (uintptr_t)(s - s_start) <= size ) { *p++ = char32; s = get_char32_from_utf16_string(s, &char32); } *p = 0; return (size_t)(p-dst); } /* * get nth char32 of an utf16 string * Return value : pointer to the end of string or at the error */ char32_t get_char32_from_utf16_string_at_pos(const char16_t* s, size_t pos) { if ( !s ) return 0; char32_t char32; s = get_char32_from_utf16_string(s, &char32); while ( char32 && pos > 0 ) { s = get_char32_from_utf16_string(s, &char32); pos--; } return char32; } /************************************************************* utf8 - wchar_t *********************************************************/ size_t utf8_size_of_wchar_string(const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf8_size_of_utf16_string((wchar_cast*)s); #else return utf8_size_of_utf32_string((wchar_cast*)s); #endif } size_t utf8_size_of_wchar_string_len(const wchar_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf8_size_of_utf16_string_len((wchar_cast*)s, len); #else return utf8_size_of_utf32_string_len((wchar_cast*)s, len); #endif } size_t wchar_size_of_utf8_string(const char* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf8_string(s); #else return utf32_size_of_utf8_string(s); #endif } size_t wchar_size_of_utf8_string_len(const char* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf8_string_len(s, len); #else return utf32_size_of_utf8_string_len(s, len); #endif } size_t utf8_stringnn_from_wchar_string(char* dst, size_t dst_max_size, const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf8_stringnn_from_utf16_string(dst, dst_max_size, (char16_t*)s); #else return utf8_stringnn_from_utf32_string(dst, dst_max_size, (char32_t*)s); #endif } size_t utf8_string_from_wchar_string(char* dst, size_t dst_max_size, const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf8_string_from_utf16_string(dst, dst_max_size, (char16_t*)s); #else return utf8_string_from_utf32_string(dst, dst_max_size, (char32_t*)s); #endif } size_t utf8_string_from_wchar_string_len(char* dst, size_t dst_max_size, const wchar_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf8_string_from_utf16_string_len(dst, dst_max_size, (char16_t*)s, len); #else return utf8_string_from_utf32_string_len(dst, dst_max_size, (char32_t*)s, len); #endif } size_t utf8_string_from_wchar_string_size(char* dst, size_t dst_max_size, const wchar_t* s, size_t size) { #if __WCHAR_MAX__ <= 0xFFFFu return utf8_string_from_utf16_string_size(dst, dst_max_size, (char16_t*)s, size); #else return utf8_string_from_utf32_string_size(dst, dst_max_size, (char32_t*)s, size); #endif } size_t wchar_stringnn_from_utf8_string(wchar_t* dst, size_t dst_max_size, const char* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_stringnn_from_utf8_string((char16_t*)dst, dst_max_size, s); #else return utf32_stringnn_from_utf8_string((char32_t*)dst, dst_max_size, s); #endif } size_t wchar_string_from_utf8_string(wchar_t* dst, size_t dst_max_size, const char* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf8_string((char16_t*)dst, dst_max_size, s); #else return utf32_string_from_utf8_string((char32_t*)dst, dst_max_size, s); #endif } size_t wchar_string_from_utf8_string_len(wchar_t* dst, size_t dst_max_size, const char* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf8_string_len((char16_t*)dst, dst_max_size, s, len); #else return utf32_string_from_utf8_string_len((char32_t*)dst, dst_max_size, s, len); #endif } size_t wchar_string_from_utf8_string_size(wchar_t* dst, size_t dst_max_size, const char* s, size_t size) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf8_string_size((char16_t*)dst, dst_max_size, s, size); #else return utf32_string_from_utf8_string_size((char32_t*)dst, dst_max_size, s, size); #endif } /************************************************************* utf16 - wchar_t *********************************************************/ size_t utf16_size_of_wchar_string(const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf16_string((wchar_cast*)s); #else return utf16_size_of_utf32_string((wchar_cast*)s); #endif } size_t utf16_size_of_wchar_string_len(const wchar_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf16_string_len((wchar_cast*)s, len); #else return utf16_size_of_utf32_string_len((wchar_cast*)s, len); #endif } size_t wchar_size_of_utf16_string(const char16_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf16_string(s); #else return utf32_size_of_utf16_string(s); #endif } size_t wchar_size_of_utf16_string_len(const char16_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf16_string_len(s, len); #else return utf32_size_of_utf16_string_len(s, len); #endif } size_t utf16_stringnn_from_wchar_string(char16_t* dst, size_t dst_max_size, const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_stringnn_from_utf16_string(dst, dst_max_size, (char16_t*)s); #else return utf16_stringnn_from_utf32_string(dst, dst_max_size, (char32_t*)s); #endif } size_t utf16_string_from_wchar_string(char16_t* dst, size_t dst_max_size, const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf16_string(dst, dst_max_size, (char16_t*)s); #else return utf16_string_from_utf32_string(dst, dst_max_size, (char32_t*)s); #endif } size_t utf16_string_from_wchar_string_len(char16_t* dst, size_t dst_max_size, const wchar_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf16_string_len(dst, dst_max_size, (char16_t*)s, len); #else return utf16_string_from_utf32_string_len(dst, dst_max_size, (char32_t*)s, len); #endif } size_t utf16_string_from_wchar_string_size(char16_t* dst, size_t dst_max_size, const wchar_t* s, size_t size) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf16_string_size(dst, dst_max_size, (char16_t*)s, size); #else return utf16_string_from_utf32_string_size(dst, dst_max_size, (char32_t*)s, size); #endif } size_t wchar_stringnn_from_utf16_string(wchar_t* dst, size_t dst_max_size, const char16_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_stringnn_from_utf16_string((char16_t*)dst, dst_max_size, s); #else return utf32_stringnn_from_utf16_string((char32_t*)dst, dst_max_size, s); #endif } size_t wchar_string_from_utf16_string(wchar_t* dst, size_t dst_max_size, const char16_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf16_string((char16_t*)dst, dst_max_size, s); #else return utf32_string_from_utf16_string((char32_t*)dst, dst_max_size, s); #endif } size_t wchar_string_from_utf16_string_len(wchar_t* dst, size_t dst_max_size, const char16_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf16_string_len((char16_t*)dst, dst_max_size, s, len); #else return utf32_string_from_utf16_string_len((char32_t*)dst, dst_max_size, s, len); #endif } size_t wchar_string_from_utf16_string_size(wchar_t* dst, size_t dst_max_size, const char16_t* s, size_t size) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf16_string_size((char16_t*)dst, dst_max_size, s, size); #else return utf32_string_from_utf16_string_size((char32_t*)dst, dst_max_size, s, size); #endif } /************************************************************* utf32 - wchar_t *********************************************************/ size_t utf32_size_of_wchar_string(const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf32_size_of_utf16_string((wchar_cast*)s); #else return utf32_size_of_utf32_string((wchar_cast*)s); #endif } size_t utf32_size_of_wchar_string_len(const wchar_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf32_size_of_utf16_string_len((wchar_cast*)s, len); #else return utf32_size_of_utf32_string_len((wchar_cast*)s, len); #endif } size_t wchar_size_of_utf32_string(const char32_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf32_string(s); #else return utf32_size_of_utf32_string(s); #endif } size_t wchar_size_of_utf32_string_len(const char32_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf32_string_len(s, len); #else return utf32_size_of_utf32_string_len(s, len); #endif } size_t utf32_stringnn_from_wchar_string(char32_t* dst, size_t dst_max_size, const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf32_stringnn_from_utf16_string(dst, dst_max_size, (char16_t*)s); #else return utf32_stringnn_from_utf32_string(dst, dst_max_size, (char32_t*)s); #endif } size_t utf32_string_from_wchar_string(char32_t* dst, size_t dst_max_size, const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf32_string_from_utf16_string(dst, dst_max_size, (char16_t*)s); #else return utf32_string_from_utf32_string(dst, dst_max_size, (char32_t*)s); #endif } size_t utf32_string_from_wchar_string_len(char32_t* dst, size_t dst_max_size, const wchar_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf32_string_from_utf16_string_len(dst, dst_max_size, (char16_t*)s, len); #else return utf32_string_from_utf32_string_len(dst, dst_max_size, (char32_t*)s, len); #endif } size_t utf32_string_from_wchar_string_size(char32_t* dst, size_t dst_max_size, const wchar_t* s, size_t size) { #if __WCHAR_MAX__ <= 0xFFFFu return utf32_string_from_utf16_string_size(dst, dst_max_size, (char16_t*)s, size); #else return utf32_string_from_utf32_string_size(dst, dst_max_size, (char32_t*)s, size); #endif } size_t wchar_stringnn_from_utf32_string(wchar_t* dst, size_t dst_max_size, const char32_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_stringnn_from_utf32_string((char16_t*)dst, dst_max_size, s); #else return utf32_stringnn_from_utf32_string((char32_t*)dst, dst_max_size, s); #endif } size_t wchar_string_from_utf32_string(wchar_t* dst, size_t dst_max_size, const char32_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf32_string((char16_t*)dst, dst_max_size, s); #else return utf32_string_from_utf32_string((char32_t*)dst, dst_max_size, s); #endif } size_t wchar_string_from_utf32_string_len(wchar_t* dst, size_t dst_max_size, const char32_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf32_string_len((char16_t*)dst, dst_max_size, s, len); #else return utf32_string_from_utf32_string_len((char32_t*)dst, dst_max_size, s, len); #endif } size_t wchar_string_from_utf32_string_size(wchar_t* dst, size_t dst_max_size, const char32_t* s, size_t size) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf32_string_size((char16_t*)dst, dst_max_size, s, size); #else return utf32_string_from_utf32_string_size((char32_t*)dst, dst_max_size, s, size); #endif } /* * get nth char32 of an utf16 string * Return value : pointer to the end of string or at the error */ char32_t get_char32_from_wchar_string_at_pos(const char16_t* s, size_t pos) { #if __WCHAR_MAX__ <= 0xFFFFu return get_char32_from_utf16_string_at_pos((char16_t*)s, pos); #else return get_char32_from_utf32_string_at_pos((char32_t*)s, pos); #endif } /************************************************************* no conversion *********************************************************/ // Not efficient. Could be map to the ones provided by operating system size_t utf8_size_of_utf8_string(const char* s) { if ( !s ) return 0; ////2021 : tested on macOS. With this version, test took 8 seconds. // char32_t char32 = 1; // const char* p = s; // while ( char32 ) { // p = get_char32_from_utf8_string(p, &char32); // } // return (uintptr_t)p - (uintptr_t)s; return strlen(s);// With this version, test took 0.2 seconds. strlen on macOs is optimized for SSE. // return clover_strlen(s); // With this version, test took 0.4 seconds. //// 2021 : // With this version, test took 2.2 seconds. // const char* p = s; // while ( *p++ ); // return (uintptr_t)p - (uintptr_t)s - 1; } size_t utf8_size_of_utf8_string_len(const char* s, size_t len) { if ( !s || len <= 0 ) return 0; char32_t char32 = 1; const char* p = s; // = get_char32_from_utf8_string(s, &char32); while ( char32 && len > 0 ) { p = get_char32_from_utf8_string(p, &char32); len -= 1; } return (size_t)(p-s);// p-s is in number of char32_t, not bytes. Careful, uintptr_t(p)-uintptr_t(s) would be in bytes } size_t utf16_size_of_utf16_string(const char16_t* s) { if ( !s ) return 0; char32_t char32 = 1; const char16_t* p = s; // = get_char32_from_utf8_string(s, &char32); while ( char32 ) { p = get_char32_from_utf16_string(p, &char32); } return (size_t)(p-s);// p-s is in number of char32_t, not bytes. Careful, uintptr_t(p)-uintptr_t(s) would be in bytes // const char16_t* p = s; // while ( *p++ ); // return (size_t)(p-s-1); } size_t utf16_size_of_utf16_string_len(const char16_t* s, size_t len) { if ( !s ) return 0; size_t size = 0; char32_t char32; s = get_char32_from_utf16_string(s, &char32); while ( char32 && len > 0 ) { size += utf16_size_of_utf32_char(char32); s = get_char32_from_utf16_string(s, &char32); len -= 1; } return size; } size_t utf32_size_of_utf32_string(const char32_t* s) { const char32_t* p = s; while ( *p++ ); return ((size_t)(p-s-1)); // p-s is in number of char32_t, not bytes. // Let's hope that p-s-1 is not > MAX_SIZET } size_t utf32_size_of_utf32_string_len(const char32_t* s, size_t len) { const char32_t* p = s; while ( *p++ && len > 0 ) len -= 1; return ((size_t)(p-s-1)); // p-s is in number of char32_t, not bytes. // Let's hope that p-s-1 is not > MAX_SIZET } size_t wchar_size_of_wchar_string(const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf16_string((char16_t*)s); #else return utf32_size_of_utf32_string((char32_t*)s); #endif } size_t wchar_size_of_wchar_string_len(const wchar_t* s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_size_of_utf16_string_len((char16_t*)s, len); #else return utf32_size_of_utf32_string_len((char32_t*)s, len); #endif } size_t utf8_stringnn_from_utf8_string(char* dst, size_t dst_max_size, const char *s) { if ( !s || dst_max_size <= 0 ) return 0; char* p = dst; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 ) { p = get_utf8_from_char32(p, &dst_max_size, char32); if ( dst_max_size <= 0 ) break; s = get_char32_from_utf8_string(s, &char32); } return (uintptr_t)p - (uintptr_t)dst; } size_t utf8_string_from_utf8_string(char* dst, size_t dst_max_size, const char *s) { if ( dst_max_size <= 0 ) return 0; size_t size = utf8_stringnn_from_utf8_string(dst, dst_max_size, s); if ( size >= dst_max_size ) { *(dst + dst_max_size - 1) = 0; return dst_max_size-1; }else{ *(dst + size) = 0; return size; } } // //size_t utf8_string_from_utf8_string(char* dst, size_t dst_max_size, const char *s) //{ // if ( !s || dst_max_size <= 1 ) { // if ( dst_max_size > 0 ) *dst = 0; // return 0; // } // dst_max_size -= 1; // char* p = dst; // char32_t char32; // s = get_char32_from_utf8_string(s, &char32); // while ( char32 && dst_max_size > 0 ) { // p = get_utf8_from_char32(p, &dst_max_size, char32); // s = get_char32_from_utf8_string(s, &char32); // } // *p = 0; // return uintptr_t(p)-uintptr_t(dst)-1; //} size_t utf8_string_from_utf8_string_len(char* dst, size_t dst_max_size, const char *s, size_t len) { if ( !s || len <= 0 || dst_max_size <= 1 ) { if ( dst_max_size > 0 ) *dst = 0; return 0; } dst_max_size -= 1; char* p = dst; char32_t char32; s = get_char32_from_utf8_string(s, &char32); while ( char32 && dst_max_size > 0 && len > 0) { p = get_utf8_from_char32(p, &dst_max_size, char32); s = get_char32_from_utf8_string(s, &char32); len--; } *p = 0; // return (uintptr_t)p - (uintptr_t)dst - 1; return (uintptr_t)p - (uintptr_t)dst; } /* Number Bits for First Last Byte 1 Byte 2 Byte 3 cByte 4 of bytes code point 1 7 U+0000 U+007F 0xxxxxxx 2 11 U+0080 U+07FF 110xxxxx 10xxxxxx 3 16 U+0800 U+FFFF 1110xxxx 10xxxxxx 10xxxxxx 4 21 U+10000 U+10FFFF[12] 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */ size_t utf8_string_from_utf8_string_size(char* dst, size_t dst_max_size, const char *s, size_t size) { if ( !s || size <= 0 || dst_max_size <= 1 ) { if ( dst_max_size > 0 ) *dst = 0; return 0; } size_t real_size = utf8_size_of_utf8_string(s); if ( real_size == 0 ) { *dst = 0; // here, dst_max_size is > 1 return 0; } size = MIN(real_size, size); dst_max_size -= 1; size = MIN(size, dst_max_size); if ( s[size-1] & 0x80 ) { size_t idx_of_first_multibyte = size; while ( idx_of_first_multibyte > 0 && (s[--idx_of_first_multibyte] & 0xC0) == 0x80 ) ; if ( (s[idx_of_first_multibyte] & 0xC0) == 0xC0 ) // this is the first of the multibyte sequence { if ( (s[idx_of_first_multibyte] & 0xE0) == 0xC0 ) { // 2 bytes sequence if ( size - idx_of_first_multibyte < 2 ) size = idx_of_first_multibyte; else size = idx_of_first_multibyte + 2; }else if ( (s[idx_of_first_multibyte] & 0xF0) == 0xE0 ) { // 3 bytes sequence if ( size - idx_of_first_multibyte < 3 ) size = idx_of_first_multibyte; else size = idx_of_first_multibyte + 3; }else if ( (s[idx_of_first_multibyte] & 0xF8) == 0xF0 ) { // 3 bytes sequence if ( size - idx_of_first_multibyte < 4 ) size = idx_of_first_multibyte; else size = idx_of_first_multibyte + 4; } }else{ while ( size > 1 && ( s[--size] & 0x80 ) ) ; // remove all the multibyte chars because there is none multibyte beginning sequence. } } // while ( size > 0 && (s[size-1] & 0x80) ) --size; // ignore incomplete UTF8 sequence. // Cannot put the --size inside the if because size must not be modified if !(s[size-1] & 0x80) memmove(dst, s, size); dst[size] = 0; return size; } size_t utf16_stringnn_from_utf16_string(char16_t* dst, size_t dst_max_size, const char16_t *s) { if ( !s || dst_max_size <= 0 ) return 0; char16_t* p = dst; char32_t char32; s = get_char32_from_utf16_string(s, &char32); while ( char32 ) { p = get_utf16_from_char32(p, &dst_max_size, char32); if ( dst_max_size <= 0 ) break; s = get_char32_from_utf16_string(s, &char32); } return (uintptr_t)(p - dst); } size_t utf16_string_from_utf16_string(char16_t* dst, size_t dst_max_size, const char16_t *s) { if ( dst_max_size <= 0 ) return 0; size_t size = utf16_stringnn_from_utf16_string(dst, dst_max_size, s); if ( size >= dst_max_size ) { *(dst + dst_max_size - 1) = 0; return dst_max_size-1; }else{ *(dst + size) = 0; return size; } } // //size_t utf16_string_from_utf16_string(char16_t* dst, size_t dst_max_size, const char16_t *s) //{ // if ( !s || dst_max_size <= 1 ) { // if ( dst_max_size > 0 ) *dst = 0; // return 0; // } // dst_max_size -= 1; // char16_t* p = dst; // char32_t char32; // s = get_char32_from_utf16_string(s, &char32); // while ( char32 && dst_max_size > 0 ) { // p = get_utf16_from_char32(p, &dst_max_size, char32); // s = get_char32_from_utf16_string(s, &char32); // } // *p = 0; // return uintptr_t(p)-uintptr_t(dst)-1; //// size_t s_len = utf16_size_of_utf16_string(s); //// if ( dst_max_size > s_len ) dst_max_size = s_len; //// else dst_max_size -= 1; //// memcpy((void*)dst, (void*)s, dst_max_size * sizeof(char16_t)); //// dst[dst_max_size] = 0; //// return dst_max_size * sizeof(char16_t); //} size_t utf16_string_from_utf16_string_len(char16_t* dst, size_t dst_max_size, const char16_t *s, size_t len) { if ( !s || len <= 0 || dst_max_size <= 1 ) { if ( dst_max_size > 0 ) *dst = 0; return 0; } dst_max_size -= 1; char16_t* p = dst; char32_t char32; s = get_char32_from_utf16_string(s, &char32); while ( char32 && dst_max_size > 0 && len > 0) { p = get_utf16_from_char32(p, &dst_max_size, char32); s = get_char32_from_utf16_string(s, &char32); len--; } *p = 0; return (uintptr_t)(p - dst); } size_t utf16_string_from_utf16_string_size(char16_t* dst, size_t dst_max_size, const char16_t *s, size_t size) { if ( dst_max_size == 0 ) return 0; if ( dst_max_size == 1 || !s || size <= 0 ) { *dst = 0; return 0; } size_t real_size = utf16_size_of_utf16_string(s); if ( real_size == 0 ) { *dst = 0; // here, dst_max_size is > 1 return 0; } size = MIN(real_size, size); // size & real_size are >= 1 dst_max_size -= 1; // dst_max_size is > 1 size = MIN(size, dst_max_size); // here, size is >= 1 if ( is_high_surrogate(s[size-1]) ) --size; memmove(dst, s, size*sizeof(char16_t)); dst[size] = 0; return size; } size_t utf32_stringnn_from_utf32_string(char32_t* dst, size_t dst_max_size, const char32_t *s) { if ( !s || dst_max_size <= 0 ) { return 0; } size_t s_len = utf32_size_of_utf32_string(s); if ( dst_max_size > s_len ) dst_max_size = s_len; memcpy((void*)dst, (void*)s, dst_max_size * sizeof(char32_t)); return dst_max_size; } size_t utf32_string_from_utf32_string(char32_t* dst, size_t dst_max_size, const char32_t *s) { if ( dst_max_size <= 0 ) return 0; size_t size = utf32_stringnn_from_utf32_string(dst, dst_max_size, s); if ( size >= dst_max_size ) { *(dst + dst_max_size - 1) = 0; return dst_max_size-1; }else{ *(dst + size) = 0; return size; } } //size_t utf32_string_from_utf32_string(char32_t* dst, size_t dst_max_size, const char32_t *s) //{ // if ( !s || dst_max_size <= 1 ) { // if ( dst_max_size > 0 ) *dst = 0; // return 0; // } // size_t s_len = utf32_size_of_utf32_string(s); // if ( dst_max_size > s_len ) dst_max_size = s_len; // else dst_max_size -= 1; // memcpy((void*)dst, (void*)s, dst_max_size * sizeof(char32_t)); // dst[dst_max_size] = 0; // return dst_max_size * sizeof(char32_t); //} size_t utf32_string_from_utf32_string_len(char32_t* dst, size_t dst_max_size, const char32_t *s, size_t len) { if ( !s || len <= 0 || dst_max_size <= 1 ) { if ( dst_max_size > 0 ) *dst = 0; return 0; } size_t s_len = utf32_size_of_utf32_string_len(s, len); if ( dst_max_size > s_len ) dst_max_size = s_len; else dst_max_size -= 1; memcpy((void*)dst, (void*)s, dst_max_size * sizeof(char32_t)); dst[dst_max_size] = 0; return dst_max_size; } size_t utf32_string_from_utf32_string_size(char32_t* dst, size_t dst_max_size, const char32_t *s, size_t size) { if ( !s || size <= 0 || dst_max_size <= 1 ) { if ( dst_max_size > 0 ) *dst = 0; return 0; } size_t real_size = utf32_size_of_utf32_string(s); if ( real_size == 0 ) { *dst = 0; // here, dst_max_size is > 1 return 0; } size = MIN(real_size, size); dst_max_size -= 1; size = MIN(size, dst_max_size); memmove(dst, s, size*sizeof(char32_t)); dst[size] = 0; return size; } size_t wchar_stringnn_from_wchar_string(wchar_t* dst, size_t dst_max_size, const wchar_t *s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_stringnn_from_utf16_string((char16_t*)dst, dst_max_size, (char16_t*)s); #else return utf32_stringnn_from_utf32_string((char32_t*)dst, dst_max_size, (char32_t*)s); #endif } size_t wchar_string_from_wchar_string(wchar_t* dst, size_t dst_max_size, const wchar_t *s) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf16_string((char16_t*)dst, dst_max_size, (char16_t*)s); #else return utf32_string_from_utf32_string((char32_t*)dst, dst_max_size, (char32_t*)s); #endif } size_t wchar_string_from_wchar_string_len(wchar_t* dst, size_t dst_max_size, const wchar_t *s, size_t len) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf16_string_len((char16_t*)dst, dst_max_size, (char16_t*)s, len); #else return utf32_string_from_utf32_string_len((char32_t*)dst, dst_max_size, (char32_t*)s, len); #endif } size_t wchar_string_from_wchar_string_size(wchar_t* dst, size_t dst_max_size, const wchar_t *s, size_t size) { #if __WCHAR_MAX__ <= 0xFFFFu return utf16_string_from_utf16_string_size((char16_t*)dst, dst_max_size, (char16_t*)s, size); #else return utf32_string_from_utf32_string_size((char32_t*)dst, dst_max_size, (char32_t*)s, size); #endif } /* * get nth char32 of an utf32 string * Return value : pointer to the end of string or at the error */ char32_t get_char32_from_utf32_string_at_pos(const char32_t* s, size_t pos) { if ( !s ) return 0; while ( *s && pos > 0 ) { s++; pos--; } return *s; } /****** convenience *****/ size_t length_of_utf8_string(const char* s) {return utf32_size_of_utf8_string(s); } size_t length_of_utf16_string(const char16_t* s) {return utf32_size_of_utf16_string(s); } size_t length_of_utf32_string(const char32_t* s) {return utf32_size_of_utf32_string(s); } // UTF32 length == size size_t length_of_wchar_string(const wchar_t* s) { #if __WCHAR_MAX__ <= 0xFFFFu return length_of_utf16_string((char16_t*)s); #else return length_of_utf32_string((char32_t*)s); #endif } #ifdef __cplusplus } #endif