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NS/releases/3.1/source/cl_dll/parsemsg.cpp

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/***
*
* Copyright (c) 1999, Valve LLC. All rights reserved.
*
* This product contains software technology licensed from Id
* Software, Inc. ("Id Technology"). Id Technology (c) 1996 Id Software, Inc.
* All Rights Reserved.
*
* Use, distribution, and modification of this source code and/or resulting
* object code is restricted to non-commercial enhancements to products from
* Valve LLC. All other use, distribution, or modification is prohibited
* without written permission from Valve LLC.
*
****/
//
// parsemsg.cpp
//
typedef unsigned char byte;
#define true 1
static byte *gpBuf;
static int giSize;
static int giRead;
static int giBadRead;
void BEGIN_READ( void *buf, int size )
{
giRead = 0;
giBadRead = 0;
giSize = size;
gpBuf = (byte*)buf;
}
int READ_CHAR( void )
{
int c;
if (giRead + 1 > giSize)
{
giBadRead = true;
return -1;
}
c = (signed char)gpBuf[giRead];
giRead++;
return c;
}
int READ_BYTE( void )
{
int c;
if (giRead+1 > giSize)
{
giBadRead = true;
return -1;
}
c = (unsigned char)gpBuf[giRead];
giRead++;
return c;
}
int READ_SHORT( void )
{
int c;
if (giRead+2 > giSize)
{
giBadRead = true;
return -1;
}
c = (short)( gpBuf[giRead] + ( gpBuf[giRead+1] << 8 ) );
giRead += 2;
return c;
}
int READ_WORD( void )
{
return READ_SHORT();
}
int READ_LONG( void )
{
int c;
if (giRead+4 > giSize)
{
giBadRead = true;
return -1;
}
c = gpBuf[giRead] + (gpBuf[giRead + 1] << 8) + (gpBuf[giRead + 2] << 16) + (gpBuf[giRead + 3] << 24);
giRead += 4;
return c;
}
float READ_FLOAT( void )
{
union
{
byte b[4];
float f;
int l;
} dat;
dat.b[0] = gpBuf[giRead];
dat.b[1] = gpBuf[giRead+1];
dat.b[2] = gpBuf[giRead+2];
dat.b[3] = gpBuf[giRead+3];
giRead += 4;
// dat.l = LittleLong (dat.l);
return dat.f;
}
char* READ_STRING( void )
{
static char string[2048];
int l,c;
string[0] = 0;
l = 0;
do
{
if ( giRead+1 > giSize )
break; // no more characters
c = READ_CHAR();
if (c == -1 || c == 0)
break;
string[l] = c;
l++;
} while (l < sizeof(string)-1);
string[l] = 0;
return string;
}
float READ_COORD( void )
{
return (float)(READ_SHORT() * (1.0/8));
}
float READ_ANGLE( void )
{
return (float)(READ_CHAR() * (360.0/256));
}
float READ_HIRESANGLE( void )
{
return (float)(READ_SHORT() * (360.0/65536));
}