746 lines
12 KiB
C
746 lines
12 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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Portions Copyright (C) 1999,2000 Nelson Rush.
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Copyright (C) 1999,2000 contributors of the QuakeForge project
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Please see the file "AUTHORS" for a list of contributors
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// common.c -- misc functions used in client and server
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#include <string.h>
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#include <qtypes.h>
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#include <qdefs.h>
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#include <cvar.h>
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#include <quakefs.h>
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#include <common.h>
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#include <net.h>
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#include <zone.h>
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#include <sys.h>
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#include <qendian.h>
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#include <console.h>
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#include <cmd.h>
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#include <stdarg.h>
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#include <lib_replace.h>
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#define NUM_SAFE_ARGVS 7
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static char *largv[MAX_NUM_ARGVS + NUM_SAFE_ARGVS + 1];
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static char *argvdummy = " ";
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static char *safeargvs[NUM_SAFE_ARGVS] =
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{"-stdvid", "-nolan", "-nosound", "-nocdaudio", "-nojoy", "-nomouse", "-dibonly"};
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cvar_t cmdline = {"cmdline","0", false, true};
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qboolean com_modified; // set true if using non-id files
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qboolean proghack;
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qboolean msg_suppress_1 = 0;
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void COM_InitFilesystem (void);
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// if a packfile directory differs from this, it is assumed to be hacked
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#define PAK0_COUNT 339
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#define PAK0_CRC 32981
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char com_token[1024];
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int com_argc;
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char **com_argv;
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#define CMDLINE_LENGTH 256
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char com_cmdline[CMDLINE_LENGTH];
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qboolean standard_quake = true, rogue, hipnotic;
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extern cvar_t developer;
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//============================================================================
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// ClearLink is used for new headnodes
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void ClearLink (link_t *l)
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{
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l->prev = l->next = l;
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}
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void RemoveLink (link_t *l)
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{
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l->next->prev = l->prev;
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l->prev->next = l->next;
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}
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void InsertLinkBefore (link_t *l, link_t *before)
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{
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l->next = before;
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l->prev = before->prev;
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l->prev->next = l;
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l->next->prev = l;
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}
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void InsertLinkAfter (link_t *l, link_t *after)
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{
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l->next = after->next;
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l->prev = after;
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l->prev->next = l;
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l->next->prev = l;
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}
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/*
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==============================================================================
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MESSAGE IO FUNCTIONS
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Handles byte ordering and avoids alignment errors
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==============================================================================
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*/
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//
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// writing functions
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//
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void MSG_WriteChar (sizebuf_t *sb, int c)
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{
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byte *buf;
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#ifdef PARANOID
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if (c < -128 || c > 127)
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Sys_Error ("MSG_WriteChar: range error");
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#endif
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buf = SZ_GetSpace (sb, 1);
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buf[0] = c;
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}
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void MSG_WriteByte (sizebuf_t *sb, int c)
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{
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byte *buf;
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#ifdef PARANOID
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if (c < 0 || c > 255)
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Sys_Error ("MSG_WriteByte: range error");
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#endif
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buf = SZ_GetSpace (sb, 1);
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buf[0] = c;
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}
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void MSG_WriteShort (sizebuf_t *sb, int c)
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{
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byte *buf;
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#ifdef PARANOID
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if (c < ((short)0x8000) || c > (short)0x7fff)
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Sys_Error ("MSG_WriteShort: range error");
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#endif
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buf = SZ_GetSpace (sb, 2);
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buf[0] = c&0xff;
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buf[1] = c>>8;
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}
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void MSG_WriteLong (sizebuf_t *sb, int c)
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{
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byte *buf;
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buf = SZ_GetSpace (sb, 4);
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buf[0] = c&0xff;
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buf[1] = (c>>8)&0xff;
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buf[2] = (c>>16)&0xff;
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buf[3] = c>>24;
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}
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void MSG_WriteFloat (sizebuf_t *sb, float f)
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{
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union
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{
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float f;
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int l;
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} dat;
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dat.f = f;
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dat.l = LittleLong (dat.l);
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SZ_Write (sb, &dat.l, 4);
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}
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void MSG_WriteString (sizebuf_t *sb, char *s)
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{
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if (!s)
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SZ_Write (sb, "", 1);
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else
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SZ_Write (sb, s, Q_strlen(s)+1);
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}
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void MSG_WriteCoord (sizebuf_t *sb, float f)
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{
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MSG_WriteShort (sb, (int)(f*8));
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}
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void MSG_WriteAngle (sizebuf_t *sb, float f)
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{
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MSG_WriteByte (sb, ((int)f*256/360) & 255);
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}
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//
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// reading functions
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//
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int msg_readcount;
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qboolean msg_badread;
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void MSG_BeginReading (void)
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{
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msg_readcount = 0;
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msg_badread = false;
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}
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// returns -1 and sets msg_badread if no more characters are available
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int MSG_ReadChar (void)
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{
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int c;
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if (msg_readcount+1 > net_message.cursize)
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{
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msg_badread = true;
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return -1;
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}
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c = (signed char)net_message.data[msg_readcount];
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msg_readcount++;
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return c;
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}
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int MSG_ReadByte (void)
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{
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int c;
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if (msg_readcount+1 > net_message.cursize)
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{
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msg_badread = true;
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return -1;
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}
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c = (unsigned char)net_message.data[msg_readcount];
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msg_readcount++;
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return c;
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}
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int MSG_ReadShort (void)
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{
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int c;
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if (msg_readcount+2 > net_message.cursize)
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{
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msg_badread = true;
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return -1;
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}
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c = (short)(net_message.data[msg_readcount]
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+ (net_message.data[msg_readcount+1]<<8));
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msg_readcount += 2;
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return c;
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}
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int MSG_ReadLong (void)
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{
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int c;
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if (msg_readcount+4 > net_message.cursize)
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{
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msg_badread = true;
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return -1;
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}
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c = net_message.data[msg_readcount]
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+ (net_message.data[msg_readcount+1]<<8)
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+ (net_message.data[msg_readcount+2]<<16)
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+ (net_message.data[msg_readcount+3]<<24);
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msg_readcount += 4;
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return c;
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}
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float MSG_ReadFloat (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] = net_message.data[msg_readcount];
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dat.b[1] = net_message.data[msg_readcount+1];
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dat.b[2] = net_message.data[msg_readcount+2];
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dat.b[3] = net_message.data[msg_readcount+3];
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msg_readcount += 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 *MSG_ReadString (void)
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{
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static char string[2048];
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int l,c;
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l = 0;
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do
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{
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c = MSG_ReadChar ();
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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 MSG_ReadCoord (void)
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{
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return MSG_ReadShort() * (1.0/8);
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}
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float MSG_ReadAngle (void)
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{
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return MSG_ReadChar() * (360.0/256);
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}
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//===========================================================================
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void SZ_Alloc (sizebuf_t *buf, int startsize)
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{
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if (startsize < 256)
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startsize = 256;
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buf->data = Hunk_AllocName (startsize, "sizebuf");
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buf->maxsize = startsize;
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buf->cursize = 0;
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}
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void SZ_Free (sizebuf_t *buf)
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{
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// Z_Free (buf->data);
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// buf->data = NULL;
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// buf->maxsize = 0;
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buf->cursize = 0;
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}
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void SZ_Clear (sizebuf_t *buf)
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{
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buf->cursize = 0;
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}
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void *SZ_GetSpace (sizebuf_t *buf, int length)
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{
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void *data;
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if (buf->cursize + length > buf->maxsize)
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{
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if (!buf->allowoverflow)
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Sys_Error ("SZ_GetSpace: overflow without allowoverflow set");
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if (length > buf->maxsize)
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Sys_Error ("SZ_GetSpace: %i is > full buffer size", length);
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buf->overflowed = true;
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Con_Printf ("SZ_GetSpace: overflow");
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SZ_Clear (buf);
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}
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data = buf->data + buf->cursize;
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buf->cursize += length;
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return data;
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}
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void SZ_Write (sizebuf_t *buf, void *data, int length)
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{
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Q_memcpy (SZ_GetSpace(buf,length),data,length);
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}
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void SZ_Print (sizebuf_t *buf, char *data)
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{
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int len;
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len = Q_strlen(data)+1;
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// byte * cast to keep VC++ happy
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if (buf->data[buf->cursize-1])
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Q_memcpy ((byte *)SZ_GetSpace(buf, len),data,len); // no trailing 0
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else
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Q_memcpy ((byte *)SZ_GetSpace(buf, len-1)-1,data,len); // write over trailing 0
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}
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//============================================================================
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/*
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============
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COM_SkipPath
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============
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*/
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char *COM_SkipPath (char *pathname)
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{
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char *last;
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last = pathname;
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while (*pathname)
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{
|
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if (*pathname=='/')
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last = pathname+1;
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pathname++;
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}
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return last;
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}
|
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|
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/*
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============
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COM_StripExtension
|
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============
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|
*/
|
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void COM_StripExtension (char *in, char *out)
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{
|
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while (*in && *in != '.')
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*out++ = *in++;
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*out = 0;
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}
|
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|
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/*
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============
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COM_FileExtension
|
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============
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|
*/
|
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char *COM_FileExtension (char *in)
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{
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static char exten[8];
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int i;
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while (*in && *in != '.')
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in++;
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if (!*in)
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return "";
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in++;
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for (i=0 ; i<7 && *in ; i++,in++)
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exten[i] = *in;
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exten[i] = 0;
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return exten;
|
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}
|
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|
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/*
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============
|
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COM_FileBase
|
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============
|
|
*/
|
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void COM_FileBase (char *in, char *out)
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{
|
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char *s, *s2;
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|
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s = in + strlen(in) - 1;
|
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|
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while (s != in && *s != '.')
|
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s--;
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|
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for (s2 = s ; *s2 && *s2 != '/' ; s2--)
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;
|
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|
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if (s-s2 < 2)
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strcpy (out,"?model?");
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else
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{
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s--;
|
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strncpy (out,s2+1, s-s2);
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out[s-s2] = 0;
|
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}
|
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}
|
|
|
|
|
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/*
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==================
|
|
COM_DefaultExtension
|
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==================
|
|
*/
|
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void COM_DefaultExtension (char *path, char *extension)
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{
|
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char *src;
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//
|
|
// if path doesn't have a .EXT, append extension
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// (extension should include the .)
|
|
//
|
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src = path + strlen(path) - 1;
|
|
|
|
while (*src != '/' && src != path)
|
|
{
|
|
if (*src == '.')
|
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return; // it has an extension
|
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src--;
|
|
}
|
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|
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strcat (path, extension);
|
|
}
|
|
|
|
|
|
/*
|
|
==============
|
|
COM_Parse
|
|
|
|
Parse a token out of a string
|
|
==============
|
|
*/
|
|
char *COM_Parse (char *data)
|
|
{
|
|
int c;
|
|
int len;
|
|
|
|
len = 0;
|
|
com_token[0] = 0;
|
|
|
|
if (!data)
|
|
return NULL;
|
|
|
|
// skip whitespace
|
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skipwhite:
|
|
while ( (c = *data) <= ' ')
|
|
{
|
|
if (c == 0)
|
|
return NULL; // end of file;
|
|
data++;
|
|
}
|
|
|
|
// skip // comments
|
|
if (c=='/' && data[1] == '/')
|
|
{
|
|
while (*data && *data != '\n')
|
|
data++;
|
|
goto skipwhite;
|
|
}
|
|
|
|
|
|
// handle quoted strings specially
|
|
if (c == '\"')
|
|
{
|
|
data++;
|
|
while (1)
|
|
{
|
|
c = *data++;
|
|
if (c=='\"' || !c)
|
|
{
|
|
com_token[len] = 0;
|
|
return data;
|
|
}
|
|
com_token[len] = c;
|
|
len++;
|
|
}
|
|
}
|
|
|
|
// parse single characters
|
|
if (c=='{' || c=='}'|| c==')'|| c=='(' || c=='\'' || c==':')
|
|
{
|
|
com_token[len] = c;
|
|
len++;
|
|
com_token[len] = 0;
|
|
return data+1;
|
|
}
|
|
|
|
// parse a regular word
|
|
do
|
|
{
|
|
com_token[len] = c;
|
|
data++;
|
|
len++;
|
|
c = *data;
|
|
if (c=='{' || c=='}'|| c==')'|| c=='(' || c=='\'' || c==':')
|
|
break;
|
|
} while (c>32);
|
|
|
|
com_token[len] = 0;
|
|
return data;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
COM_CheckParm
|
|
|
|
Returns the position (1 to argc-1) in the program's argument list
|
|
where the given parameter apears, or 0 if not present
|
|
================
|
|
*/
|
|
int COM_CheckParm (char *parm)
|
|
{
|
|
int i;
|
|
|
|
for (i=1 ; i<com_argc ; i++)
|
|
{
|
|
if (!com_argv[i])
|
|
continue; // NEXTSTEP sometimes clears appkit vars.
|
|
if (!Q_strcmp (parm,com_argv[i]))
|
|
return i;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void COM_Path_f (void);
|
|
|
|
|
|
/*
|
|
================
|
|
COM_InitArgv
|
|
================
|
|
*/
|
|
void COM_InitArgv (int argc, char **argv)
|
|
{
|
|
qboolean safe;
|
|
int i, j, n;
|
|
|
|
// reconstitute the command line for the cmdline externally visible cvar
|
|
n = 0;
|
|
|
|
for (j=0 ; (j<MAX_NUM_ARGVS) && (j< argc) ; j++)
|
|
{
|
|
i = 0;
|
|
|
|
while ((n < (CMDLINE_LENGTH - 1)) && argv[j][i])
|
|
{
|
|
com_cmdline[n++] = argv[j][i++];
|
|
}
|
|
|
|
if (n < (CMDLINE_LENGTH - 1))
|
|
com_cmdline[n++] = ' ';
|
|
else
|
|
break;
|
|
}
|
|
|
|
com_cmdline[n] = 0;
|
|
|
|
safe = false;
|
|
|
|
for (com_argc=0 ; (com_argc<MAX_NUM_ARGVS) && (com_argc < argc) ;
|
|
com_argc++)
|
|
{
|
|
largv[com_argc] = argv[com_argc];
|
|
if (!Q_strcmp ("-safe", argv[com_argc]))
|
|
safe = true;
|
|
}
|
|
|
|
if (safe)
|
|
{
|
|
// force all the safe-mode switches. Note that we reserved extra space in
|
|
// case we need to add these, so we don't need an overflow check
|
|
for (i=0 ; i<NUM_SAFE_ARGVS ; i++)
|
|
{
|
|
largv[com_argc] = safeargvs[i];
|
|
com_argc++;
|
|
}
|
|
}
|
|
|
|
largv[com_argc] = argvdummy;
|
|
com_argv = largv;
|
|
|
|
if (COM_CheckParm ("-rogue"))
|
|
{
|
|
rogue = true;
|
|
standard_quake = false;
|
|
}
|
|
|
|
if (COM_CheckParm ("-hipnotic"))
|
|
{
|
|
hipnotic = true;
|
|
standard_quake = false;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
COM_Init
|
|
================
|
|
*/
|
|
void COM_Init (char *basedir)
|
|
{
|
|
#ifdef WORDS_BIGENDIAN
|
|
BigShort = ShortNoSwap;
|
|
LittleShort = ShortSwap;
|
|
BigLong = LongNoSwap;
|
|
LittleLong = LongSwap;
|
|
BigFloat = FloatNoSwap;
|
|
LittleFloat = FloatSwap;
|
|
#else
|
|
BigShort = ShortSwap;
|
|
LittleShort = ShortNoSwap;
|
|
BigLong = LongSwap;
|
|
LittleLong = LongNoSwap;
|
|
BigFloat = FloatSwap;
|
|
LittleFloat = FloatNoSwap;
|
|
#endif
|
|
|
|
Cvar_RegisterVariable (&cmdline);
|
|
Cmd_AddCommand ("path", COM_Path_f);
|
|
|
|
COM_InitFilesystem ();
|
|
register_check ();
|
|
}
|
|
|
|
|
|
/*
|
|
============
|
|
va
|
|
|
|
does a varargs printf into a temp buffer, so I don't need to have
|
|
varargs versions of all text functions.
|
|
FIXME: make this buffer size safe someday
|
|
============
|
|
*/
|
|
char *va(char *format, ...)
|
|
{
|
|
va_list argptr;
|
|
static char string[1024];
|
|
|
|
va_start (argptr, format);
|
|
vsnprintf (string, sizeof(string), format, argptr);
|
|
va_end (argptr);
|
|
|
|
return string;
|
|
}
|
|
|
|
|
|
/// just for debugging
|
|
int memsearch (byte *start, int count, int search)
|
|
{
|
|
int i;
|
|
|
|
for (i=0 ; i<count ; i++)
|
|
if (start[i] == search)
|
|
return i;
|
|
return -1;
|
|
}
|