/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// sv_nchan.c, user reliable data stream writes

#include "qwsvdef.h"

// check to see if client block will fit, if not, rotate buffers
void ClientReliableCheckBlock (client_t *cl, int maxsize)
{
	if (cl->num_backbuf ||
			cl->netchan.message.cursize >
			cl->netchan.message.maxsize - maxsize - 1)
	{
		// we would probably overflow the buffer, save it for next
		if (!cl->num_backbuf)
		{
			memset (&cl->backbuf, 0, sizeof (cl->backbuf));
			cl->backbuf.allowoverflow = true;
			cl->backbuf.data = cl->backbuf_data[0];
			cl->backbuf.maxsize = sizeof (cl->backbuf_data[0]);
			cl->backbuf_size[0] = 0;
			cl->num_backbuf++;
		}
		
		if (cl->backbuf.cursize > cl->backbuf.maxsize - maxsize - 1)
		{
			if (cl->num_backbuf == MAX_BACK_BUFFERS)
			{
				Con_Printf ("WARNING: MAX_BACK_BUFFERS for %s\n", cl->name);
				cl->backbuf.cursize = 0; // don't overflow without allowoverflow set
				cl->netchan.message.overflowed = true; // this will drop the client
				return;
			}
			memset (&cl->backbuf, 0, sizeof (cl->backbuf));
			cl->backbuf.allowoverflow = true;
			cl->backbuf.data = cl->backbuf_data[cl->num_backbuf];
			cl->backbuf.maxsize = sizeof (cl->backbuf_data[cl->num_backbuf]);
			cl->backbuf_size[cl->num_backbuf] = 0;
			cl->num_backbuf++;
		}
	}
}

// begin a client block, estimated maximum size
void ClientReliableWrite_Begin (client_t *cl, int c, int maxsize)
{
	ClientReliableCheckBlock (cl, maxsize);
	ClientReliableWrite_Byte (cl, c);
}

void ClientReliable_FinishWrite (client_t *cl)
{
	if (cl->num_backbuf)
	{
		cl->backbuf_size[cl->num_backbuf - 1] = cl->backbuf.cursize;
		
		if (cl->backbuf.overflowed)
		{
			Con_Printf ("WARNING: backbuf [%d] reliable overflow for %s\n", cl->num_backbuf, cl->name);
			cl->netchan.message.overflowed = true; // this will drop the client
		}
	}
}

void ClientReliableWrite_Angle (client_t *cl, float f)
{
	if (cl->num_backbuf)
	{
		MSG_WriteAngle (&cl->backbuf, f);
		ClientReliable_FinishWrite (cl);
	}
	else
		MSG_WriteAngle (&cl->netchan.message, f);
}

void ClientReliableWrite_Angle16 (client_t *cl, float f)
{
	if (cl->num_backbuf)
	{
		MSG_WriteAngle16 (&cl->backbuf, f);
		ClientReliable_FinishWrite (cl);
	}
	else
		MSG_WriteAngle16 (&cl->netchan.message, f);
}

void ClientReliableWrite_Byte (client_t *cl, int c)
{
	if (cl->num_backbuf)
	{
		MSG_WriteByte (&cl->backbuf, c);
		ClientReliable_FinishWrite (cl);
	}
	else
		MSG_WriteByte (&cl->netchan.message, c);
}

void ClientReliableWrite_Char (client_t *cl, int c)
{
	if (cl->num_backbuf)
	{
		MSG_WriteChar (&cl->backbuf, c);
		ClientReliable_FinishWrite (cl);
	}
	else
		MSG_WriteChar (&cl->netchan.message, c);
}

void ClientReliableWrite_Float (client_t *cl, float f)
{
	if (cl->num_backbuf)
	{
		MSG_WriteFloat (&cl->backbuf, f);
		ClientReliable_FinishWrite (cl);
	}
	else
		MSG_WriteFloat (&cl->netchan.message, f);
}

void ClientReliableWrite_Coord (client_t *cl, float f)
{
	if (cl->num_backbuf)
	{
		MSG_WriteCoord (&cl->backbuf, f);
		ClientReliable_FinishWrite (cl);
	}
	else
		MSG_WriteCoord (&cl->netchan.message, f);
}

void ClientReliableWrite_Long (client_t *cl, int c)
{
	if (cl->num_backbuf)
	{
		MSG_WriteLong (&cl->backbuf, c);
		ClientReliable_FinishWrite (cl);
	}
	else
		MSG_WriteLong (&cl->netchan.message, c);
}

void ClientReliableWrite_Short (client_t *cl, int c)
{
	if (cl->num_backbuf)
	{
		MSG_WriteShort (&cl->backbuf, c);
		ClientReliable_FinishWrite (cl);
	}
	else
		MSG_WriteShort (&cl->netchan.message, c);
}

void ClientReliableWrite_String (client_t *cl, char *s)
{
	if (cl->num_backbuf)
	{
		MSG_WriteString (&cl->backbuf, s);
		ClientReliable_FinishWrite (cl);
	}
	else
		MSG_WriteString (&cl->netchan.message, s);
}

void ClientReliableWrite_SZ (client_t *cl, void *data, int len)
{
	if (cl->num_backbuf)
	{
		SZ_Write (&cl->backbuf, data, len);
		ClientReliable_FinishWrite (cl);
	}
	else
		SZ_Write (&cl->netchan.message, data, len);
}

