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CloverBootloader/rEFIt_UEFI/cpp_foundation/unicode_conversions.cpp
jief666 a2ffdf8642 Add Find/Replace with mask tests. 
Improve unit test framework.
2020-10-12 17:49:43 +03:00

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//
// utf8Conversion.hpp
//
// Created by jief the 24 Feb 2020.
//
#include "unicode_conversions.h"
#ifdef __cplusplus
extern "C" {
#endif
#include <string.h> // for memcpy
//#include <uintptr_t.h> // for memcpy
//#include <sys/_types/_uintptr_t.h>
#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
*/
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 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);
}
/*
* 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 ( !s || len <= 0 ) {
*dst = 0;
return 0;
}
char* p = dst;
dst_max_size -= 1;
while ( *s && dst_max_size > 0 && len > 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);
len--;
}
*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);
}
/************************************************************* 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 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);
}
/*
* 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 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
}
/************************************************************* 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 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
}
/************************************************************* 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 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
}
/*
* 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;
char32_t char32 = 1;
const char* p = s; // = get_char32_from_utf8_string(s, &char32);
while ( char32 ) {
p = get_char32_from_utf8_string(p, &char32);
}
return (uintptr_t)p - (uintptr_t)s;
//
// const char* p = s;
// while ( *p++ );
// return (size_t)(p-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;
}
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 - (uintptr_t)dst - 1;
}
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 * sizeof(char32_t);
}
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
}
/*
* 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
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