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