// cmd.h -- Command buffer and command execution //=========================================================================== /* Any number of commands can be added in a frame, from several different sources.Most commands come from either keybindings or console line input, but remoteservers can also send across commands and entire text files can be execed. The + command line options are also added to the command buffer. The game starts with a Cbuf_AddText ("exec quake.rc\n"); Cbuf_Execute (); */  void Cbuf_Init (void);// allocates an initial text buffer that will grow as needed void Cbuf_AddText (char *text);// as new commands are generated from the console or keybindings,// the text is added to the end of the command buffer. void Cbuf_InsertText (char *text);// when a command wants to issue other commands immediately, the text is// inserted at the beginning of the buffer, before any remaining unexecuted// commands. void Cbuf_Execute (void);// Pulls off \n terminated lines of text from the command buffer and sends// them through Cmd_ExecuteString.  Stops when the buffer is empty.// Normally called once per frame, but may be explicitly invoked.// Do not call inside a command function! //=========================================================================== /* Command execution takes a null terminated string, breaks it into tokens,then searches for a command or variable that matches the first token. Commands can come from three sources, but the handler functions may chooseto dissallow the action or forward it to a remote server if the source isnot apropriate. */ typedef void (*xcommand_t) (void); typedef struct cmd_function_s{	struct cmd_function_s	*next;	char					*name;	xcommand_t				function;	bool hidden;} cmd_function_t; typedef enum{	src_client,		// came in over a net connection as a clc_stringcmd					// host_client will be valid during this state.	src_command		// from the command buffer} cmd_source_t; extern	cmd_source_t	cmd_source; void	Cmd_Init (void); cmd_function_t *Cmd_AddCommand (char *cmd_name, xcommand_t function);// called by the init functions of other parts of the program to// register commands and functions to call for them.// The cmd_name is referenced later, so it should not be in temp memory bool Cmd_Exists (char *cmd_name);// used by the cvar code to check for cvar / command name overlap char 	*Cmd_CompleteCommand (char *partial);// attempts to match a partial command for automatic command line completion// returns NULL if nothing fits int		Cmd_Argc (void);char	*Cmd_Argv (int arg);char	*Cmd_Args (void);// The functions that execute commands get their parameters with these// functions. Cmd_Argv () will return an empty string, not a NULL// if arg > argc, so string operations are always safe. void	Cmd_ExecuteString (char *text, cmd_source_t src);// Parses a single line of text into arguments and tries to execute it.// The text can come from the command buffer, a remote client, or stdin. void	Cmd_ForwardToServer (void);// adds the current command line as a clc_stringcmd to the client message.// things like godmode, noclip, etc, are commands directed to the server,// so when they are typed in at the console, they will need to be forwarded.