ref: 06eb848b99587ef882c121a5a65d2082e3b88aeb
dir: /cmd.c/
// cmd.c -- Quake script command processing module
#include <u.h>
#include <libc.h>
#include "quakedef.h"
void Cmd_ForwardToServer (void);
#define MAX_ALIAS_NAME 32
typedef struct cmdalias_s
{
struct cmdalias_s *next;
char name[MAX_ALIAS_NAME];
char *value;
} cmdalias_t;
cmdalias_t *cmd_alias;
int trashtest;
int *trashspot;
qboolean cmd_wait;
//=============================================================================
/*
============
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"
============
*/
void Cmd_Wait_f (void)
{
cmd_wait = true;
}
/*
=============================================================================
COMMAND BUFFER
=============================================================================
*/
sizebuf_t cmd_text;
/*
============
Cbuf_Init
============
*/
void Cbuf_Init (void)
{
SZ_Alloc (&cmd_text, 8192); // space for commands and script files
}
/*
============
Cbuf_AddText
Adds command text at the end of the buffer
============
*/
void Cbuf_AddText (char *text)
{
int l;
l = Q_strlen (text);
if (cmd_text.cursize + l >= cmd_text.maxsize)
{
Con_Printf ("Cbuf_AddText: overflow\n");
return;
}
SZ_Write (&cmd_text, text, Q_strlen (text));
}
/*
============
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 (char *text)
{
char *temp;
int templen;
// copy off any commands still remaining in the exec buffer
templen = cmd_text.cursize;
if (templen)
{
temp = Z_Malloc (templen);
Q_memcpy (temp, cmd_text.data, templen);
SZ_Clear (&cmd_text);
}
else
temp = NULL; // shut up compiler
// add the entire text of the file
Cbuf_AddText (text);
// add the copied off data
if (templen)
{
SZ_Write (&cmd_text, temp, templen);
Z_Free (temp);
}
}
/*
============
Cbuf_Execute
============
*/
void Cbuf_Execute (void)
{
int i;
char *text;
char line[1024];
int quotes;
while (cmd_text.cursize)
{
// find a \n or ; line break
text = (char *)cmd_text.data;
quotes = 0;
for (i=0 ; i< cmd_text.cursize ; i++)
{
if (text[i] == '"')
quotes++;
if ( !(quotes&1) && text[i] == ';')
break; // don't break if inside a quoted string
if (text[i] == '\n')
break;
}
memcpy (line, text, i);
line[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;
Q_memcpy (text, text+i, cmd_text.cursize);
}
// execute the command line
Cmd_ExecuteString (line, src_command);
if (cmd_wait)
{ // skip out while text still remains in buffer, leaving it
// for next frame
cmd_wait = false;
break;
}
}
}
/*
==============================================================================
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
===============
*/
void Cmd_StuffCmds_f (void)
{
int i, j;
int s;
char *text, *build, c;
if (Cmd_Argc () != 1)
{
Con_Printf ("stuffcmds : execute command line parameters\n");
return;
}
// build the combined string to parse from
s = 0;
for (i=1 ; i<com_argc ; i++)
{
if (!com_argv[i])
continue; // NEXTSTEP nulls out -NXHost
s += Q_strlen (com_argv[i]) + 1;
}
if (!s)
return;
text = Z_Malloc (s+1);
text[0] = 0;
for (i=1 ; i<com_argc ; i++)
{
if (!com_argv[i])
continue; // NEXTSTEP nulls out -NXHost
Q_strcat (text,com_argv[i]);
if (i != com_argc-1)
Q_strcat (text, " ");
}
// pull out the commands
build = Z_Malloc (s+1);
build[0] = 0;
for (i=0 ; i<s-1 ; i++)
{
if (text[i] == '+')
{
i++;
for (j=i ; (text[j] != '+') && (text[j] != '-') && (text[j] != 0) ; j++)
;
c = text[j];
text[j] = 0;
Q_strcat (build, text+i);
Q_strcat (build, "\n");
text[j] = c;
i = j-1;
}
}
if (build[0])
Cbuf_InsertText (build);
Z_Free (text);
Z_Free (build);
}
/*
===============
Cmd_Exec_f
===============
*/
void Cmd_Exec_f (void)
{
char *f;
int mark;
if (Cmd_Argc () != 2)
{
Con_Printf ("exec <filename> : execute a script file\n");
return;
}
mark = Hunk_LowMark ();
f = (char *)COM_LoadHunkFile (Cmd_Argv(1));
if (!f)
{
Con_Printf ("couldn't exec %s\n",Cmd_Argv(1));
return;
}
Con_Printf ("execing %s\n",Cmd_Argv(1));
Cbuf_InsertText (f);
Hunk_FreeToLowMark (mark);
}
/*
===============
Cmd_Echo_f
Just prints the rest of the line to the console
===============
*/
void Cmd_Echo_f (void)
{
int i;
for (i=1 ; i<Cmd_Argc() ; i++)
Con_Printf ("%s ",Cmd_Argv(i));
Con_Printf ("\n");
}
/*
===============
Cmd_Alias_f
Creates a new command that executes a command string (possibly ; seperated)
===============
*/
char *CopyString (char *in)
{
char *out;
out = Z_Malloc (strlen(in)+1);
strcpy (out, in);
return out;
}
void Cmd_Alias_f (void)
{
cmdalias_t *a;
char cmd[1024];
int i, c;
char *s;
if (Cmd_Argc() == 1)
{
Con_Printf ("Current alias commands:\n");
for (a = cmd_alias ; a ; a=a->next)
Con_Printf ("%s : %s\n", a->name, a->value);
return;
}
s = Cmd_Argv(1);
if (strlen(s) >= MAX_ALIAS_NAME)
{
Con_Printf ("Alias name is too long\n");
return;
}
// if the alias allready exists, reuse it
for (a = cmd_alias ; a ; a=a->next)
{
if (!strcmp(s, a->name))
{
Z_Free (a->value);
break;
}
}
if (!a)
{
a = Z_Malloc (sizeof(cmdalias_t));
a->next = cmd_alias;
cmd_alias = a;
}
strcpy (a->name, s);
// 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++)
{
strcat (cmd, Cmd_Argv(i));
if (i != c)
strcat (cmd, " ");
}
strcat (cmd, "\n");
a->value = CopyString (cmd);
}
/*
=============================================================================
COMMAND EXECUTION
=============================================================================
*/
typedef struct cmd_function_s
{
struct cmd_function_s *next;
char *name;
xcommand_t function;
} cmd_function_t;
#define MAX_ARGS 80
static int cmd_argc;
static char *cmd_argv[MAX_ARGS];
static char *cmd_null_string = "";
static char *cmd_args = NULL;
cmd_source_t cmd_source;
static cmd_function_t *cmd_functions; // possible commands to execute
/*
============
Cmd_Init
============
*/
void Cmd_Init (void)
{
//
// register our commands
//
Cmd_AddCommand ("stuffcmds",Cmd_StuffCmds_f);
Cmd_AddCommand ("exec",Cmd_Exec_f);
Cmd_AddCommand ("echo",Cmd_Echo_f);
Cmd_AddCommand ("alias",Cmd_Alias_f);
Cmd_AddCommand ("cmd", Cmd_ForwardToServer);
Cmd_AddCommand ("wait", Cmd_Wait_f);
}
/*
============
Cmd_Argc
============
*/
int Cmd_Argc (void)
{
return cmd_argc;
}
/*
============
Cmd_Argv
============
*/
char *Cmd_Argv (int arg)
{
if ( (unsigned)arg >= cmd_argc )
return cmd_null_string;
return cmd_argv[arg];
}
/*
============
Cmd_Args
============
*/
char *Cmd_Args (void)
{
return cmd_args;
}
/*
============
Cmd_TokenizeString
Parses the given string into command line tokens.
============
*/
void Cmd_TokenizeString (char *text)
{
int i;
// clear the args from the last string
for (i=0 ; i<cmd_argc ; i++)
Z_Free (cmd_argv[i]);
cmd_argc = 0;
cmd_args = NULL;
while (1)
{
// skip whitespace up to a /n
while (*text && *text <= ' ' && *text != '\n')
{
text++;
}
if (*text == '\n')
{ // a newline seperates commands in the buffer
text++;
break;
}
if (!*text)
return;
if (cmd_argc == 1)
cmd_args = text;
text = COM_Parse (text);
if (!text)
return;
if (cmd_argc < MAX_ARGS)
{
cmd_argv[cmd_argc] = Z_Malloc (Q_strlen(com_token)+1);
Q_strcpy (cmd_argv[cmd_argc], com_token);
cmd_argc++;
}
}
}
/*
============
Cmd_AddCommand
============
*/
void Cmd_AddCommand (char *cmd_name, xcommand_t function)
{
cmd_function_t *cmd;
if (host_initialized) // because hunk allocation would get stomped
Sys_Error ("Cmd_AddCommand after host_initialized");
// fail if the command is a variable name
if (Cvar_VariableString(cmd_name)[0])
{
Con_Printf ("Cmd_AddCommand: %s already defined as a var\n", cmd_name);
return;
}
// fail if the command already exists
for (cmd=cmd_functions ; cmd ; cmd=cmd->next)
{
if (!Q_strcmp (cmd_name, cmd->name))
{
Con_Printf ("Cmd_AddCommand: %s already defined\n", cmd_name);
return;
}
}
cmd = Hunk_Alloc (sizeof(cmd_function_t));
cmd->name = cmd_name;
cmd->function = function;
cmd->next = cmd_functions;
cmd_functions = cmd;
}
/*
============
Cmd_Exists
============
*/
qboolean Cmd_Exists (char *cmd_name)
{
cmd_function_t *cmd;
for (cmd=cmd_functions ; cmd ; cmd=cmd->next)
{
if (!Q_strcmp (cmd_name,cmd->name))
return true;
}
return false;
}
/*
============
Cmd_CompleteCommand
============
*/
char *Cmd_CompleteCommand (char *partial)
{
cmd_function_t *cmd;
int len;
len = Q_strlen(partial);
if (!len)
return NULL;
// check functions
for (cmd=cmd_functions ; cmd ; cmd=cmd->next)
if (!Q_strncmp (partial,cmd->name, len))
return cmd->name;
return NULL;
}
/*
============
Cmd_ExecuteString
A complete command line has been parsed, so try to execute it
FIXME: lookupnoadd the token to speed search?
============
*/
void Cmd_ExecuteString (char *text, cmd_source_t src)
{
cmd_function_t *cmd;
cmdalias_t *a;
cmd_source = src;
Cmd_TokenizeString (text);
// execute the command line
if (!Cmd_Argc())
return; // no tokens
// check functions
for (cmd=cmd_functions ; cmd ; cmd=cmd->next)
{
if (!Q_strcasecmp (cmd_argv[0],cmd->name))
{
cmd->function ();
return;
}
}
// check alias
for (a=cmd_alias ; a ; a=a->next)
{
if (!Q_strcasecmp (cmd_argv[0], a->name))
{
Cbuf_InsertText (a->value);
return;
}
}
// check cvars
if (!Cvar_Command ())
Con_Printf ("Unknown command \"%s\"\n", Cmd_Argv(0));
}
/*
===================
Cmd_ForwardToServer
Sends the entire command line over to the server
===================
*/
void Cmd_ForwardToServer (void)
{
if (cls.state != ca_connected)
{
Con_Printf ("Can't \"%s\", not connected\n", Cmd_Argv(0));
return;
}
if (cls.demoplayback)
return; // not really connected
MSG_WriteByte (&cls.message, clc_stringcmd);
if (Q_strcasecmp(Cmd_Argv(0), "cmd") != 0)
{
SZ_Print (&cls.message, Cmd_Argv(0));
SZ_Print (&cls.message, " ");
}
if (Cmd_Argc() > 1)
SZ_Print (&cls.message, Cmd_Args());
else
SZ_Print (&cls.message, "\n");
}
/*
================
Cmd_CheckParm
Returns the position (1 to argc-1) in the command's argument list
where the given parameter apears, or 0 if not present
================
*/
int Cmd_CheckParm (char *parm)
{
int i;
if (!parm)
Sys_Error ("Cmd_CheckParm: NULL");
for (i = 1; i < Cmd_Argc (); i++)
if (! Q_strcasecmp (parm, Cmd_Argv (i)))
return i;
return 0;
}