SDL_utf8strnlen - Man Page

Defined in SDL3/SDL_stdinc.h

#include "SDL3/SDL.h"

size_t SDL_utf8strnlen(const char *str, size_t bytes);

Counts the _codepoints_, not _bytes_, in str , excluding the null terminator.

If you need to count the bytes in a string instead, consider using

SDL_strnlen ().

The counting stops at bytes bytes (not codepoints!). This seems counterintuitive, but makes it easy to express the total size of the string's buffer.

Since this handles Unicode, it expects the strings to be well-formed UTF-8 and not a null-terminated string of arbitrary bytes. Bytes that are not valid UTF-8 are treated as Unicode character U+FFFD (REPLACEMENT CHARACTER), so a malformed or incomplete UTF-8 sequence might increase the count by several replacement characters.

str

The null-terminated UTF-8 string to read. Must not be NULL.

bytes

The maximum amount of bytes to count.

Returns The length (in codepoints, excluding the null terminator) of src but never more than maxlen .

It is safe to call this function from any thread.

This function is available since SDL 3.2.0.

·(3), SDL_utf8strlen(3), ·(3), SDL_strnlen(3)

SDL_strlen(3), SDL_strnlen(3), SDL_utf8strlen(3), SDL_wcslen(3), SDL_wcsnlen(3).