cstl_sys

Function CSTL_u8string_copy

Source 
pub unsafe extern "C" fn CSTL_u8string_copy(
    instance: CSTL_UTF8StringCRef,
    dest: *mut char8_t,
    count: usize,
    off: usize,
) -> usize
Expand description

Copies a substring [off, off + count) to character string pointed to by dest. The resulting character string is not null terminated.

Returns the number of characters copied or CSTL_string_npos if off > CSTL_u8string_size(instance) (out of range).