char8_t

 

C

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Technical Specifications

Symbol index

 

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Wide/multibyte conversions
mbsinit (C95)
mbstowcsmbstowcs_s (C11) btowc (C95) mbrtowc (C95) mbsrtowcsmbsrtowcs_s (C95)(C11)     mbrtoc8 (C23) c8rtomb (C23) mbrtoc16 (C11) c16rtomb (C11) c32rtomb (C11) mbrtoc32 (C11)	mblen mbtowc wctombwctomb_s (C11) wcstombswcstombs_s (C11) wctob (C95) wcrtombwcrtomb_s (C95)(C11) wcsrtombswcsrtombs_s (C95)(C11) mbrlen (C95)
Types
mbstate_t (C95)

 

Defined in header <uchar.h>
typedef unsigned char char8_t;		(since C23)

char8_t is an unsigned integer type used for UTF-8 and is the same type as unsigned char.

Example

Run this code

#include <uchar.h>
#include <stdio.h>
 
int main(void)
{
    char8_t str[] = u8"zß水🍌"; // or "z\u00df\u6c34\U0001f34c"
    size_t str_sz = sizeof str; // sizeof *str == 1 by definition
    printf("%zu UTF-8 code units: [ ", str_sz);
    for (size_t n = 0; n < str_sz; ++n)
        printf("%02X ", str[n]);
    printf("]\n");
}

Possible output:

11 UTF-8 code units: [ 7A C3 9F E6 B0 B4 F0 9F 8D 8C 00 ]

References

• C23 standard (ISO/IEC 9899:2023):

• 7.30 Unicode utilities <uchar.h> (p: 410)