Cube  Diff

// misc useful functions used by the server

#include "cube.h"

// all network traffic is in 32bit ints, which are then compressed using the
// following simple scheme (assumes that most values are small).

void
putint(uchar *&p, int n)
putint(uchar **p, int n)
{
	if (n < 128 && n > -127) {
		*p++ = n;
		*(*p)++ = n;
	} else if (n < 0x8000 && n >= -0x8000) {
		*p++ = 0x80;
		*p++ = n;
		*p++ = n >> 8;
		*(*p)++ = 0x80;
		*(*p)++ = n;
		*(*p)++ = n >> 8;
	} else {
		*p++ = 0x81;
		*p++ = n;
		*p++ = n >> 8;
		*p++ = n >> 16;
		*p++ = n >> 24;
		*(*p)++ = 0x81;
		*(*p)++ = n;
		*(*p)++ = n >> 8;
		*(*p)++ = n >> 16;
		*(*p)++ = n >> 24;
	}
}

int
getint(uchar *&p)
getint(uchar **p)
{
	int c = *((char *)p);
	p++;
	int c = *((char *)*p);
	(*p)++;
	if (c == -128) {
		int n = *p++;
		n |= *((char *)p) << 8;
		p++;
		int n = *(*p)++;
		n |= *((char *)*p) << 8;
		(*p)++;
		return n;
	} else if (c == -127) {
		int n = *p++;
		n |= *p++ << 8;
		n |= *p++ << 16;
		return n | (*p++ << 24);
		int n = *(*p)++;
		n |= *(*p)++ << 8;
		n |= *(*p)++ << 16;
		return n | (*(*p)++ << 24);
	} else
		return c;
}

void
sendstring(OFString *t_, uchar *&p)
sendstring(OFString *t_, uchar **p)
{
	const char *t = t_.UTF8String;

	for (size_t i = 0; i < _MAXDEFSTR && *t != '\0'; i++)
		putint(p, *t++);

	putint(p, 0);

{
	if (!copydata)
		return NULL;
	ENetPacket *packet = enet_packet_create(
	    NULL, MAXTRANS + copysize, ENET_PACKET_FLAG_RELIABLE);
	uchar *start = packet->data;
	uchar *p = start + 2;
	putint(p, SV_RECVMAP);
	sendstring(copyname, p);
	putint(p, copysize);
	putint(&p, SV_RECVMAP);
	sendstring(copyname, &p);
	putint(&p, copysize);
	memcpy(p, copydata, copysize);
	p += copysize;
	*(ushort *)start = ENET_HOST_TO_NET_16(p - start);
	enet_packet_resize(packet, p - start);
	return packet;
}