Function mp_encode_double

deps/lua/src/lua_cmsgpack.c:203–219

we assume IEEE 754 internal format for single and double precision floats. */

/* we assume IEEE 754 internal format for single and double precision floats. */
void mp_encode_double(lua_State *L, mp_buf *buf, double d) {
    unsigned char b[9];
    float f = d;

    assert(sizeof(f) == 4 && sizeof(d) == 8);
    if (d == (double)f) {
        b[0] = 0xca;    /* float IEEE 754 */
        memcpy(b+1,&f,4);
        memrevifle(b+1,4);
        mp_buf_append(L,buf,b,5);
    } else if (sizeof(d) == 8) {
        b[0] = 0xcb;    /* double IEEE 754 */
        memcpy(b+1,&d,8);
        memrevifle(b+1,8);
        mp_buf_append(L,buf,b,9);
    }
}

void mp_encode_int(lua_State *L, mp_buf *buf, int64_t n) {
    unsigned char b[9];