gistfile1.c

#define RPC_PACK_RAW(buffer, idx, pvalue, size) do {\
	if (idx + size >= RPC_PAYLOAD_MAX) {\
		RPC_ERROR("data too large");\
		goto fail; \
	}\
	memcpy(buffer + idx, pvalue, size);\
	idx += size;\
} while (0)

#define RPC_PACK(buffer, idx, value) \
	RPC_PACK_RAW(buffer, idx, &value, sizeof(value))

#define RPC_PACK_S(buffer, idx, str) do {\
	size_t __len = strlen(str) + 1; \
	RPC_PACK_RAW(buffer, idx, str, __len); \
} while (0)

#define RPC_UNPACK_RAW(buffer, idx, pvalue, size) do {\
	if (idx + size >= RPC_PAYLOAD_MAX) {\
		RPC_ERROR("data too large");\
		goto fail;\
	}\
	memcpy(pvalue, buffer + idx, size);\
	idx += size;\
} while (0)

#define RPC_UNPACK(buffer, idx, value) \
	RPC_UNPACK_RAW(buffer, idx, &value, sizeof(value))

#define RPC_UNPACK_S(buffer, idx, str) do {\
	size_t __len = strlen(buffer + idx) + 1;\
	RPC_UNPACK_RAW(buffer, idx, str, __len);\
} while (0)