Source to Quake/cmd.h
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// 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 remote
servers 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
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 choose
to dissallow the action or forward it to a remote server if the source is
typedef void (*xcommand_t) (void);
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
extern cmd_source_t cmd_source;
void Cmd_Init (void);
void 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
qboolean 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 allways safe.
int Cmd_CheckParm (char *parm);
// Returns the position (1 to argc-1) in the command's argument list
// where the given parameter apears, or 0 if not present
void Cmd_TokenizeString (char *text);
// Takes a null terminated string. Does not need to be /n terminated.
// breaks the string up into arg tokens.
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.
void Cmd_Print (char *text);
// used by command functions to send output to either the graphics console or
// passed as a print message to the client