marshall.h

#undef U8
#define U8(x) *p++ = (x);
#undef U16
#define U16(x) U8((x) >> 8) U8((uint8_t)(x))
#undef I8
#define I8 U8
#undef I16
#define I16 U16
#undef WIRE
#define WIRE(x)                               \
	do {                                  \
		uint8_t *p0 = g_buf + g_curr; \
		uint8_t *p = p0;              \
		U8(x);
#undef BYTES
#define BYTES(s, n)                        \
	for (unsigned i = 0; i < (n); i++) \
		p[i] = (s)[i];             \
	p += (n);
#undef DONE
#define DONE              \
	g_curr += p - p0; \
	}                 \
	while (0)