Function fread_unlocked

examples/stdlib.c:3703–3740

}

static size_t fread_unlocked(void *ptr, size_t size, size_t nmemb,
        FILE *stream)
{
    if (stdio_stream_read_init(stream) < 0)
        return 0;
    size_t total = size * nmemb;
    if (total == 0)
        return 0;
    char *ptr8 = (char *)ptr;
    bool unget = (stream->unget != EOF);
    if (unget)
    {
        ptr8[0] = (char)stream->unget;
        stream->unget = EOF;
    }
    if (stream->read_ptr == NULL)
    {
        ssize_t result = stdio_stream_read_buf(stream, ptr8 + unget,
            ptr8 + total - unget);
        result = (result < 0? (ssize_t)unget: result);
        return ((size_t)result == total? nmemb: (size_t)result / size);
    }
    size_t i;
    for (i = unget; i < total; i++)
    {
        int c;
        if (stream->read_ptr < stream->read_end)
            c = (int)*stream->read_ptr++;
        else
        {
            c = fgetc_unlocked(stream);
            if (feof_unlocked(stream) || ferror_unlocked(stream))
                break;
        }
        ptr8[i] = (char)c;
    }
    return (i == total? nmemb: i / size);
}

static size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
{