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cmd.c
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cmd.c
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/*
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.
*/
// cmd.c -- Quake script command processing module
#include "quakedef.h"
#include "thread.h"
typedef struct cmdalias_s
{
struct cmdalias_s *next;
char name[MAX_ALIAS_NAME];
char *value;
qboolean initstate; // indicates this command existed at init
char *initialvalue; // backup copy of value at init
} cmdalias_t;
static cmdalias_t *cmd_alias;
static qboolean cmd_wait;
static mempool_t *cmd_mempool;
static char cmd_tokenizebuffer[CMD_TOKENIZELENGTH];
static int cmd_tokenizebufferpos = 0;
//=============================================================================
/*
============
Cmd_Wait_f
Causes execution of the remainder of the command buffer to be delayed until
next frame. This allows commands like:
bind g "impulse 5 ; +attack ; wait ; -attack ; impulse 2"
============
*/
static void Cmd_Wait_f (void)
{
cmd_wait = true;
}
typedef struct cmddeferred_s
{
struct cmddeferred_s *next;
char *value;
double delay;
} cmddeferred_t;
static cmddeferred_t *cmd_deferred_list = NULL;
/*
============
Cmd_Defer_f
Cause a command to be executed after a delay.
============
*/
static void Cmd_Defer_f (void)
{
if(Cmd_Argc() == 1)
{
cmddeferred_t *next = cmd_deferred_list;
if(!next)
Con_Printf("No commands are pending.\n");
while(next)
{
Con_Printf("-> In %9.2f: %s\n", next->delay, next->value);
next = next->next;
}
} else if(Cmd_Argc() == 2 && !strcasecmp("clear", Cmd_Argv(1)))
{
while(cmd_deferred_list)
{
cmddeferred_t *cmd = cmd_deferred_list;
cmd_deferred_list = cmd->next;
Mem_Free(cmd->value);
Mem_Free(cmd);
}
} else if(Cmd_Argc() == 3)
{
const char *value = Cmd_Argv(2);
cmddeferred_t *defcmd = (cmddeferred_t*)Mem_Alloc(tempmempool, sizeof(*defcmd));
size_t len = strlen(value);
defcmd->delay = atof(Cmd_Argv(1));
defcmd->value = (char*)Mem_Alloc(tempmempool, len+1);
memcpy(defcmd->value, value, len+1);
defcmd->next = NULL;
if(cmd_deferred_list)
{
cmddeferred_t *next = cmd_deferred_list;
while(next->next)
next = next->next;
next->next = defcmd;
} else
cmd_deferred_list = defcmd;
/* Stupid me... this changes the order... so commands with the same delay go blub :S
defcmd->next = cmd_deferred_list;
cmd_deferred_list = defcmd;*/
} else {
Con_Printf("usage: defer <seconds> <command>\n"
" defer clear\n");
return;
}
}
/*
============
Cmd_Centerprint_f
Print something to the center of the screen using SCR_Centerprint
============
*/
static void Cmd_Centerprint_f (void)
{
char msg[MAX_INPUTLINE];
unsigned int i, c, p;
c = Cmd_Argc();
if(c >= 2)
{
strlcpy(msg, Cmd_Argv(1), sizeof(msg));
for(i = 2; i < c; ++i)
{
strlcat(msg, " ", sizeof(msg));
strlcat(msg, Cmd_Argv(i), sizeof(msg));
}
c = strlen(msg);
for(p = 0, i = 0; i < c; ++i)
{
if(msg[i] == '\\')
{
if(msg[i+1] == 'n')
msg[p++] = '\n';
else if(msg[i+1] == '\\')
msg[p++] = '\\';
else {
msg[p++] = '\\';
msg[p++] = msg[i+1];
}
++i;
} else {
msg[p++] = msg[i];
}
}
msg[p] = '\0';
SCR_CenterPrint(msg);
}
}
/*
=============================================================================
COMMAND BUFFER
=============================================================================
*/
static sizebuf_t cmd_text;
static unsigned char cmd_text_buf[CMDBUFSIZE];
void *cmd_text_mutex = NULL;
#define Cbuf_LockThreadMutex() (cmd_text_mutex ? Thread_LockMutex(cmd_text_mutex),1 : 0)
#define Cbuf_UnlockThreadMutex() (cmd_text_mutex ? Thread_UnlockMutex(cmd_text_mutex),1 : 0)
/*
============
Cbuf_AddText
Adds command text at the end of the buffer
============
*/
void Cbuf_AddText (const char *text)
{
int l;
l = (int)strlen(text);
Cbuf_LockThreadMutex();
if (cmd_text.cursize + l >= cmd_text.maxsize)
Con_Print("Cbuf_AddText: overflow\n");
else
SZ_Write(&cmd_text, (const unsigned char *)text, l);
Cbuf_UnlockThreadMutex();
}
/*
============
Cbuf_InsertText
Adds command text immediately after the current command
Adds a \n to the text
FIXME: actually change the command buffer to do less copying
============
*/
void Cbuf_InsertText (const char *text)
{
size_t l = strlen(text);
Cbuf_LockThreadMutex();
// we need to memmove the existing text and stuff this in before it...
if (cmd_text.cursize + l >= (size_t)cmd_text.maxsize)
Con_Print("Cbuf_InsertText: overflow\n");
else
{
// we don't have a SZ_Prepend, so...
memmove(cmd_text.data + l, cmd_text.data, cmd_text.cursize);
cmd_text.cursize += l;
memcpy(cmd_text.data, text, l);
}
Cbuf_UnlockThreadMutex();
}
/*
============
Cbuf_Execute_Deferred --blub
============
*/
static void Cbuf_Execute_Deferred (void)
{
static double oldrealtime = 0;
cmddeferred_t *cmd, *prev;
double eat;
if (realtime - oldrealtime < 0 || realtime - oldrealtime > 1800) oldrealtime = realtime;
eat = realtime - oldrealtime;
if (eat < (1.0 / 120.0))
return;
oldrealtime = realtime;
prev = NULL;
cmd = cmd_deferred_list;
while(cmd)
{
cmd->delay -= eat;
if(cmd->delay <= 0)
{
Cbuf_AddText(cmd->value);
Cbuf_AddText(";\n");
Mem_Free(cmd->value);
if(prev) {
prev->next = cmd->next;
Mem_Free(cmd);
cmd = prev->next;
} else {
cmd_deferred_list = cmd->next;
Mem_Free(cmd);
cmd = cmd_deferred_list;
}
continue;
}
prev = cmd;
cmd = cmd->next;
}
}
/*
============
Cbuf_Execute
============
*/
static void Cmd_PreprocessString( const char *intext, char *outtext, unsigned maxoutlen, cmdalias_t *alias );
void Cbuf_Execute (void)
{
int i;
char *text;
char line[MAX_INPUTLINE];
char preprocessed[MAX_INPUTLINE];
char *firstchar;
qboolean quotes;
char *comment;
// LordHavoc: making sure the tokenizebuffer doesn't get filled up by repeated crashes
cmd_tokenizebufferpos = 0;
while (cmd_text.cursize)
{
// find a \n or ; line break
text = (char *)cmd_text.data;
quotes = false;
comment = NULL;
for (i=0 ; i < cmd_text.cursize ; i++)
{
if(!comment)
{
if (text[i] == '"')
quotes = !quotes;
if(quotes)
{
// make sure i doesn't get > cursize which causes a negative
// size in memmove, which is fatal --blub
if (i < (cmd_text.cursize-1) && (text[i] == '\\' && (text[i+1] == '"' || text[i+1] == '\\')))
i++;
}
else
{
if(text[i] == '/' && text[i + 1] == '/' && (i == 0 || ISWHITESPACE(text[i-1])))
comment = &text[i];
if(text[i] == ';')
break; // don't break if inside a quoted string or comment
}
}
if (text[i] == '\r' || text[i] == '\n')
break;
}
// better than CRASHING on overlong input lines that may SOMEHOW enter the buffer
if(i >= MAX_INPUTLINE)
{
Con_Printf("Warning: console input buffer had an overlong line. Ignored.\n");
line[0] = 0;
}
else
{
memcpy (line, text, comment ? (comment - text) : i);
line[comment ? (comment - text) : i] = 0;
}
// delete the text from the command buffer and move remaining commands down
// this is necessary because commands (exec, alias) can insert data at the
// beginning of the text buffer
if (i == cmd_text.cursize)
cmd_text.cursize = 0;
else
{
i++;
cmd_text.cursize -= i;
memmove (cmd_text.data, text+i, cmd_text.cursize);
}
// execute the command line
firstchar = line;
while(*firstchar && ISWHITESPACE(*firstchar))
++firstchar;
if(
(strncmp(firstchar, "alias", 5) || !ISWHITESPACE(firstchar[5]))
&&
(strncmp(firstchar, "bind", 4) || !ISWHITESPACE(firstchar[4]))
&&
(strncmp(firstchar, "in_bind", 7) || !ISWHITESPACE(firstchar[7]))
)
{
Cmd_PreprocessString( line, preprocessed, sizeof(preprocessed), NULL );
Cmd_ExecuteString (preprocessed, src_command, false);
}
else
{
Cmd_ExecuteString (line, src_command, false);
}
if (cmd_wait)
{ // skip out while text still remains in buffer, leaving it
// for next frame
cmd_wait = false;
break;
}
}
}
void Cbuf_Frame(void)
{
Cbuf_Execute_Deferred();
if (cmd_text.cursize)
{
SV_LockThreadMutex();
Cbuf_Execute();
SV_UnlockThreadMutex();
}
}
/*
==============================================================================
SCRIPT COMMANDS
==============================================================================
*/
/*
===============
Cmd_StuffCmds_f
Adds command line parameters as script statements
Commands lead with a +, and continue until a - or another +
quake +prog jctest.qp +cmd amlev1
quake -nosound +cmd amlev1
===============
*/
qboolean host_stuffcmdsrun = false;
static void Cmd_StuffCmds_f (void)
{
int i, j, l;
// this is for all commandline options combined (and is bounds checked)
char build[MAX_INPUTLINE];
if (Cmd_Argc () != 1)
{
Con_Print("stuffcmds : execute command line parameters\n");
return;
}
// no reason to run the commandline arguments twice
if (host_stuffcmdsrun)
return;
host_stuffcmdsrun = true;
build[0] = 0;
l = 0;
for (i = 0;i < com_argc;i++)
{
if (com_argv[i] && com_argv[i][0] == '+' && (com_argv[i][1] < '0' || com_argv[i][1] > '9') && l + strlen(com_argv[i]) - 1 <= sizeof(build) - 1)
{
j = 1;
while (com_argv[i][j])
build[l++] = com_argv[i][j++];
i++;
for (;i < com_argc;i++)
{
if (!com_argv[i])
continue;
if ((com_argv[i][0] == '+' || com_argv[i][0] == '-') && (com_argv[i][1] < '0' || com_argv[i][1] > '9'))
break;
if (l + strlen(com_argv[i]) + 4 > sizeof(build) - 1)
break;
build[l++] = ' ';
if (strchr(com_argv[i], ' '))
build[l++] = '\"';
for (j = 0;com_argv[i][j];j++)
build[l++] = com_argv[i][j];
if (strchr(com_argv[i], ' '))
build[l++] = '\"';
}
build[l++] = '\n';
i--;
}
}
// now terminate the combined string and prepend it to the command buffer
// we already reserved space for the terminator
build[l++] = 0;
Cbuf_InsertText (build);
}
static void Cmd_Exec(const char *filename)
{
char *f;
qboolean isdefaultcfg = strlen(filename) >= 11 && !strcmp(filename + strlen(filename) - 11, "default.cfg");
if (!strcmp(filename, "config.cfg"))
{
filename = CONFIGFILENAME;
if (COM_CheckParm("-noconfig"))
return; // don't execute config.cfg
}
f = (char *)FS_LoadFile (filename, tempmempool, false, NULL);
if (!f)
{
Con_Printf("couldn't exec %s\n",filename);
return;
}
Con_Printf("execing %s\n",filename);
// if executing default.cfg for the first time, lock the cvar defaults
// it may seem backwards to insert this text BEFORE the default.cfg
// but Cbuf_InsertText inserts before, so this actually ends up after it.
if (isdefaultcfg)
Cbuf_InsertText("\ncvar_lockdefaults\n");
// insert newline after the text to make sure the last line is terminated (some text editors omit the trailing newline)
// (note: insertion order here is backwards from execution order, so this adds it after the text, by calling it before...)
Cbuf_InsertText ("\n");
Cbuf_InsertText (f);
Mem_Free(f);
if (isdefaultcfg)
{
// special defaults for specific games go here, these execute before default.cfg
// Nehahra pushable crates malfunction in some levels if this is on
// Nehahra NPC AI is confused by blowupfallenzombies
if (gamemode == GAME_NEHAHRA)
Cbuf_InsertText("\nsv_gameplayfix_upwardvelocityclearsongroundflag 0\nsv_gameplayfix_blowupfallenzombies 0\n\n");
// hipnotic mission pack has issues in their 'friendly monster' ai, which seem to attempt to attack themselves for some reason when findradius() returns non-solid entities.
// hipnotic mission pack has issues with bobbing water entities 'jittering' between different heights on alternate frames at the default 0.0138889 ticrate, 0.02 avoids this issue
// hipnotic mission pack has issues in their proximity mine sticking code, which causes them to bounce off.
if (gamemode == GAME_HIPNOTIC)
Cbuf_InsertText("\nsv_gameplayfix_blowupfallenzombies 0\nsys_ticrate 0.02\nsv_gameplayfix_slidemoveprojectiles 0\n\n");
// rogue mission pack has a guardian boss that does not wake up if findradius returns one of the entities around its spawn area
if (gamemode == GAME_ROGUE)
Cbuf_InsertText("\nsv_gameplayfix_findradiusdistancetobox 0\n\n");
if (gamemode == GAME_NEXUIZ)
Cbuf_InsertText("\nsv_gameplayfix_q2airaccelerate 1\nsv_gameplayfix_stepmultipletimes 1\n\n");
if (gamemode == GAME_TENEBRAE)
Cbuf_InsertText("\nr_shadow_gloss 2\nr_shadow_bumpscale_basetexture 4\n\n");
// Steel Storm: Burning Retribution csqc misinterprets CSQC_InputEvent if type is a value other than 0 or 1
if (gamemode == GAME_STEELSTORM)
Cbuf_InsertText("\ncl_csqc_generatemousemoveevents 0\n\n");
}
}
/*
===============
Cmd_Exec_f
===============
*/
static void Cmd_Exec_f (void)
{
fssearch_t *s;
int i;
if (Cmd_Argc () != 2)
{
Con_Print("exec <filename> : execute a script file\n");
return;
}
s = FS_Search(Cmd_Argv(1), true, true);
if(!s || !s->numfilenames)
{
Con_Printf("couldn't exec %s\n",Cmd_Argv(1));
return;
}
for(i = 0; i < s->numfilenames; ++i)
Cmd_Exec(s->filenames[i]);
FS_FreeSearch(s);
}
/*
===============
Cmd_Echo_f
Just prints the rest of the line to the console
===============
*/
static void Cmd_Echo_f (void)
{
int i;
for (i=1 ; i<Cmd_Argc() ; i++)
Con_Printf("%s ",Cmd_Argv(i));
Con_Print("\n");
}
// DRESK - 5/14/06
// Support Doom3-style Toggle Console Command
/*
===============
Cmd_Toggle_f
Toggles a specified console variable amongst the values specified (default is 0 and 1)
===============
*/
static void Cmd_Toggle_f(void)
{
// Acquire Number of Arguments
int nNumArgs = Cmd_Argc();
if(nNumArgs == 1)
// No Arguments Specified; Print Usage
Con_Print("Toggle Console Variable - Usage\n toggle <variable> - toggles between 0 and 1\n toggle <variable> <value> - toggles between 0 and <value>\n toggle <variable> [string 1] [string 2]...[string n] - cycles through all strings\n");
else
{ // Correct Arguments Specified
// Acquire Potential CVar
cvar_t* cvCVar = Cvar_FindVar( Cmd_Argv(1) );
if(cvCVar != NULL)
{ // Valid CVar
if(nNumArgs == 2)
{ // Default Usage
if(cvCVar->integer)
Cvar_SetValueQuick(cvCVar, 0);
else
Cvar_SetValueQuick(cvCVar, 1);
}
else
if(nNumArgs == 3)
{ // 0 and Specified Usage
if(cvCVar->integer == atoi(Cmd_Argv(2) ) )
// CVar is Specified Value; // Reset to 0
Cvar_SetValueQuick(cvCVar, 0);
else
if(cvCVar->integer == 0)
// CVar is 0; Specify Value
Cvar_SetQuick(cvCVar, Cmd_Argv(2) );
else
// CVar does not match; Reset to 0
Cvar_SetValueQuick(cvCVar, 0);
}
else
{ // Variable Values Specified
int nCnt;
int bFound = 0;
for(nCnt = 2; nCnt < nNumArgs; nCnt++)
{ // Cycle through Values
if( strcmp(cvCVar->string, Cmd_Argv(nCnt) ) == 0)
{ // Current Value Located; Increment to Next
if( (nCnt + 1) == nNumArgs)
// Max Value Reached; Reset
Cvar_SetQuick(cvCVar, Cmd_Argv(2) );
else
// Next Value
Cvar_SetQuick(cvCVar, Cmd_Argv(nCnt + 1) );
// End Loop
nCnt = nNumArgs;
// Assign Found
bFound = 1;
}
}
if(!bFound)
// Value not Found; Reset to Original
Cvar_SetQuick(cvCVar, Cmd_Argv(2) );
}
}
else
{ // Invalid CVar
Con_Printf("ERROR : CVar '%s' not found\n", Cmd_Argv(1) );
}
}
}
/*
===============
Cmd_Alias_f
Creates a new command that executes a command string (possibly ; seperated)
===============
*/
static void Cmd_Alias_f (void)
{
cmdalias_t *a;
char cmd[MAX_INPUTLINE];
int i, c;
const char *s;
size_t alloclen;
if (Cmd_Argc() == 1)
{
Con_Print("Current alias commands:\n");
for (a = cmd_alias ; a ; a=a->next)
Con_Printf("%s : %s", a->name, a->value);
return;
}
s = Cmd_Argv(1);
if (strlen(s) >= MAX_ALIAS_NAME)
{
Con_Print("Alias name is too long\n");
return;
}
// if the alias already exists, reuse it
for (a = cmd_alias ; a ; a=a->next)
{
if (!strcmp(s, a->name))
{
Z_Free (a->value);
break;
}
}
if (!a)
{
cmdalias_t *prev, *current;
a = (cmdalias_t *)Z_Malloc (sizeof(cmdalias_t));
strlcpy (a->name, s, sizeof (a->name));
// insert it at the right alphanumeric position
for( prev = NULL, current = cmd_alias ; current && strcmp( current->name, a->name ) < 0 ; prev = current, current = current->next )
;
if( prev ) {
prev->next = a;
} else {
cmd_alias = a;
}
a->next = current;
}
// copy the rest of the command line
cmd[0] = 0; // start out with a null string
c = Cmd_Argc();
for (i=2 ; i < c ; i++)
{
if (i != 2)
strlcat (cmd, " ", sizeof (cmd));
strlcat (cmd, Cmd_Argv(i), sizeof (cmd));
}
strlcat (cmd, "\n", sizeof (cmd));
alloclen = strlen (cmd) + 1;
if(alloclen >= 2)
cmd[alloclen - 2] = '\n'; // to make sure a newline is appended even if too long
a->value = (char *)Z_Malloc (alloclen);
memcpy (a->value, cmd, alloclen);
}
/*
===============
Cmd_UnAlias_f
Remove existing aliases.
===============
*/
static void Cmd_UnAlias_f (void)
{
cmdalias_t *a, *p;
int i;
const char *s;
if(Cmd_Argc() == 1)
{
Con_Print("unalias: Usage: unalias alias1 [alias2 ...]\n");
return;
}
for(i = 1; i < Cmd_Argc(); ++i)
{
s = Cmd_Argv(i);
p = NULL;
for(a = cmd_alias; a; p = a, a = a->next)
{
if(!strcmp(s, a->name))
{
if (a->initstate) // we can not remove init aliases
continue;
if(a == cmd_alias)
cmd_alias = a->next;
if(p)
p->next = a->next;
Z_Free(a->value);
Z_Free(a);
break;
}
}
if(!a)
Con_Printf("unalias: %s alias not found\n", s);
}
}
/*
=============================================================================
COMMAND EXECUTION
=============================================================================
*/
typedef struct cmd_function_s
{
struct cmd_function_s *next;
const char *name;
const char *description;
xcommand_t consolefunction;
xcommand_t clientfunction;
qboolean csqcfunc;
qboolean initstate; // indicates this command existed at init
} cmd_function_t;
static int cmd_argc;
static const char *cmd_argv[MAX_ARGS];
static const char *cmd_null_string = "";
static const char *cmd_args;
cmd_source_t cmd_source;
static cmd_function_t *cmd_functions; // possible commands to execute
static const char *Cmd_GetDirectCvarValue(const char *varname, cmdalias_t *alias, qboolean *is_multiple)
{
cvar_t *cvar;
long argno;
char *endptr;
char vabuf[1024];
if(is_multiple)
*is_multiple = false;
if(!varname || !*varname)
return NULL;
if(alias)
{
if(!strcmp(varname, "*"))
{
if(is_multiple)
*is_multiple = true;
return Cmd_Args();
}
else if(!strcmp(varname, "#"))
{
return va(vabuf, sizeof(vabuf), "%d", Cmd_Argc());
}
else if(varname[strlen(varname) - 1] == '-')
{
argno = strtol(varname, &endptr, 10);
if(endptr == varname + strlen(varname) - 1)
{
// whole string is a number, apart from the -
const char *p = Cmd_Args();
for(; argno > 1; --argno)
if(!COM_ParseToken_Console(&p))
break;
if(p)
{
if(is_multiple)
*is_multiple = true;
// kill pre-argument whitespace
for (;*p && ISWHITESPACE(*p);p++)
;
return p;
}
}
}
else
{
argno = strtol(varname, &endptr, 10);
if(*endptr == 0)
{
// whole string is a number
// NOTE: we already made sure we don't have an empty cvar name!
if(argno >= 0 && argno < Cmd_Argc())
return Cmd_Argv(argno);
}
}
}
if((cvar = Cvar_FindVar(varname)) && !(cvar->flags & CVAR_PRIVATE))
return cvar->string;
return NULL;
}
qboolean Cmd_QuoteString(char *out, size_t outlen, const char *in, const char *quoteset, qboolean putquotes)
{
qboolean quote_quot = !!strchr(quoteset, '"');
qboolean quote_backslash = !!strchr(quoteset, '\\');
qboolean quote_dollar = !!strchr(quoteset, '$');
if(putquotes)
{
if(outlen <= 2)
{
*out++ = 0;
return false;
}
*out++ = '"'; --outlen;
--outlen;
}
while(*in)
{
if(*in == '"' && quote_quot)
{
if(outlen <= 2)
goto fail;
*out++ = '\\'; --outlen;
*out++ = '"'; --outlen;
}
else if(*in == '\\' && quote_backslash)
{
if(outlen <= 2)
goto fail;
*out++ = '\\'; --outlen;
*out++ = '\\'; --outlen;
}
else if(*in == '$' && quote_dollar)
{
if(outlen <= 2)
goto fail;
*out++ = '$'; --outlen;
*out++ = '$'; --outlen;
}
else
{
if(outlen <= 1)
goto fail;
*out++ = *in; --outlen;
}
++in;
}
if(putquotes)
*out++ = '"';
*out++ = 0;
return true;
fail:
if(putquotes)
*out++ = '"';
*out++ = 0;
return false;
}
static const char *Cmd_GetCvarValue(const char *var, size_t varlen, cmdalias_t *alias)
{
static char varname[MAX_INPUTLINE]; // cmd_mutex
static char varval[MAX_INPUTLINE]; // cmd_mutex
const char *varstr;
char *varfunc;
static char asis[] = "asis"; // just to suppress const char warnings
if(varlen >= MAX_INPUTLINE)
varlen = MAX_INPUTLINE - 1;
memcpy(varname, var, varlen);
varname[varlen] = 0;
varfunc = strchr(varname, ' ');
if(varfunc)
{
*varfunc = 0;
++varfunc;
}
if(*var == 0)
{
// empty cvar name?
return NULL;
}
varstr = NULL;
if(varname[0] == '$')
varstr = Cmd_GetDirectCvarValue(Cmd_GetDirectCvarValue(varname + 1, alias, NULL), alias, NULL);
else
{
qboolean is_multiple = false;
// Exception: $* and $n- don't use the quoted form by default
varstr = Cmd_GetDirectCvarValue(varname, alias, &is_multiple);
if(is_multiple)
if(!varfunc)
varfunc = asis;
}
if(!varstr)
{
if(alias)
Con_Printf("Warning: Could not expand $%s in alias %s\n", varname, alias->name);
else
Con_Printf("Warning: Could not expand $%s\n", varname);
return NULL;
}
if(!varfunc || !strcmp(varfunc, "q")) // note: quoted form is default, use "asis" to override!
{
// quote it so it can be used inside double quotes
// we just need to replace " by \", and of course, double backslashes
Cmd_QuoteString(varval, sizeof(varval), varstr, "\"\\", false);
return varval;
}
else if(!strcmp(varfunc, "asis"))
{
return varstr;
}
else
Con_Printf("Unknown variable function %s\n", varfunc);
return varstr;
}
/*
Cmd_PreprocessString
Preprocesses strings and replaces $*, $param#, $cvar accordingly. Also strips comments.
*/
static void Cmd_PreprocessString( const char *intext, char *outtext, unsigned maxoutlen, cmdalias_t *alias ) {
const char *in;
size_t eat, varlen;
unsigned outlen;
const char *val;
// don't crash if there's no room in the outtext buffer
if( maxoutlen == 0 ) {
return;
}
maxoutlen--; // because of \0