char32_t

 

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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)
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mbstate_t (C95)

 

Defined in header <uchar.h>
typedef uint_least32_t char32_t;		(since C11)

char32_t is an unsigned integer type used for 32-bit wide characters and is the same type as uint_least32_t.

Notes

On any given platform, by the definition of uint_least32_t, the width of type char32_t can be greater than 32 bits, but the actual values stored in an object of type char32_t will always have a width of 32 bits.

Example

Run this code

#include <stdio.h>
#include <uchar.h>
 
int main(void)
{
    const char32_t wc[] = U"zß水🍌"; // or "z\u00df\u6c34\U0001f34c"
    const size_t wc_sz = sizeof wc / sizeof *wc;
    printf("%zu UTF-32 code units: [ ", wc_sz);
    for (size_t n = 0; n < wc_sz; ++n)
        printf("%#x ", wc[n]);
    printf("]\n");
}

Possible output:

5 UTF-32 code units: [ 0x7a 0xdf 0x6c34 0x1f34c 0 ]

References

• C17 standard (ISO/IEC 9899:2018):

• 7.28 Unicode utilities <uchar.h> (p: 292)

• 7.20.1.2 Minimum-width integer types (p: 212-213)

• C11 standard (ISO/IEC 9899:2011):

• 7.28 Unicode utilities <uchar.h> (p: 398)

• 7.20.1.2 Minimum-width integer types (p: 290)

• C99 standard (ISO/IEC 9899:1999):

• 7.18.1.2 Minimum-width integer types (p: 256)

See also

C++ documentation for Fundamental types