quakeforge/libs/util/cmd.c

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/*
cmd.c
script command processing module
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((unused)) const char rcsid[] =
"$Id$";
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/types.h>
#include <dirent.h>
#include "QF/cbuf.h"
#include "QF/idparse.h"
#include "QF/cmd.h"
#include "QF/cvar.h"
#include "QF/dstring.h"
#include "QF/hash.h"
#include "QF/qargs.h"
#include "QF/quakefs.h"
#include "QF/sys.h"
#include "QF/zone.h"
typedef struct cmdalias_s {
struct cmdalias_s *next;
const char *name;
const char *value;
} cmdalias_t;
static cmdalias_t *cmd_alias;
cvar_t *cmd_warncmd;
static hashtab_t *cmd_alias_hash;
static hashtab_t *cmd_hash;
cbuf_args_t *cmd_args;
static cbuf_t *cmd_cbuf;
cmd_source_t cmd_source;
/* Command parsing functions */
typedef struct cmd_function_s {
struct cmd_function_s *next;
const char *name;
xcommand_t function;
const char *description;
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qboolean pure;
} cmd_function_t;
static cmd_function_t *cmd_functions; // possible commands to execute
int
Cmd_Argc (void)
{
return cmd_args->argc;
}
const char *
Cmd_Argv (int arg)
{
if (arg >= cmd_args->argc)
return "";
return cmd_args->argv[arg]->str;
}
const char *
Cmd_Args (int start)
{
if (start >= cmd_args->argc)
return "";
return cmd_args->args[start];
}
void
Cmd_Command (cbuf_args_t *args)
{
cmd_function_t *cmd;
cmd_args = args;
//cmd_source = src;
if (!args->argc)
return; // no tokens
// check functions
cmd = (cmd_function_t *) Hash_Find (cmd_hash, args->argv[0]->str);
if (cmd) {
if (cmd->function) {
cmd->function ();
}
return;
}
// check cvars
if (Cvar_Command ())
return;
if (cbuf_active->strict)
Cbuf_Error ("command", "Command '%s' not found.", args->argv[0]->str);
else if (cmd_warncmd->int_val || developer->int_val)
Sys_Printf ("Unknown command \"%s\"\n", Cmd_Argv (0));
}
/* Registers a command and handler function */
int
Cmd_AddCommand (const char *cmd_name, xcommand_t function,
const char *description)
{
cmd_function_t *cmd;
cmd_function_t **c;
// fail if the command already exists
cmd = (cmd_function_t *) Hash_Find (cmd_hash, cmd_name);
if (cmd) {
Sys_Printf ("Cmd_AddCommand: %s already defined\n", cmd_name);
return 0;
}
cmd = calloc (1, sizeof (cmd_function_t));
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SYS_CHECKMEM (cmd);
cmd->name = cmd_name;
cmd->function = function;
cmd->description = description;
Hash_Add (cmd_hash, cmd);
for (c = &cmd_functions; *c; c = &(*c)->next)
if (strcmp ((*c)->name, cmd->name) >= 0)
break;
cmd->next = *c;
*c = cmd;
return 1;
}
/* Unregisters a command */
int
Cmd_RemoveCommand (const char *name)
{
cmd_function_t *cmd;
cmd_function_t **c;
cmd = (cmd_function_t *) Hash_Del (cmd_hash, name);
if (!cmd)
return 0;
for (c = &cmd_functions; *c; c = &(*c)->next)
if ((*c)->next == cmd)
break;
(*c)->next = cmd->next;
free (cmd);
return 1;
}
/* Checks for the existance of a command */
qboolean
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Cmd_Exists (const char *cmd_name)
{
cmd_function_t *cmd;
cmd = (cmd_function_t *) Hash_Find (cmd_hash, cmd_name);
if (cmd) {
return true;
}
return false;
}
/* Command completion functions */
const char *
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Cmd_CompleteCommand (const char *partial)
{
cmd_function_t *cmd;
int len;
len = strlen (partial);
if (!len)
return NULL;
// check for exact match
for (cmd = cmd_functions; cmd; cmd = cmd->next)
if (!strcasecmp (partial, cmd->name))
return cmd->name;
// check for partial match
for (cmd = cmd_functions; cmd; cmd = cmd->next)
if (!strncasecmp (partial, cmd->name, len))
return cmd->name;
return NULL;
}
/*
Cmd_CompleteCountPossible
New function for tab-completion system
Added by EvilTypeGuy
Thanks to Fett erich@heintz.com
Thanks to taniwha
*/
int
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Cmd_CompleteCountPossible (const char *partial)
{
cmd_function_t *cmd;
int len;
int h;
h = 0;
len = strlen (partial);
if (!len)
return 0;
// Loop through the command list and count all partial matches
for (cmd = cmd_functions; cmd; cmd = cmd->next)
if (!strncasecmp (partial, cmd->name, len))
h++;
return h;
}
/*
Cmd_CompleteBuildList
New function for tab-completion system
Added by EvilTypeGuy
Thanks to Fett erich@heintz.com
Thanks to taniwha
*/
const char **
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Cmd_CompleteBuildList (const char *partial)
{
cmd_function_t *cmd;
int len = 0;
int bpos = 0;
int sizeofbuf;
const char **buf;
sizeofbuf = (Cmd_CompleteCountPossible (partial) + 1) * sizeof (char *);
len = strlen (partial);
buf = malloc (sizeofbuf + sizeof (char *));
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SYS_CHECKMEM (buf);
// Loop through the alias list and print all matches
for (cmd = cmd_functions; cmd; cmd = cmd->next)
if (!strncasecmp (partial, cmd->name, len))
buf[bpos++] = cmd->name;
buf[bpos] = NULL;
return buf;
}
/* Hash table functions for aliases and commands */
static void
cmd_alias_free (void *_a, void *unused)
{
cmdalias_t *a = (cmdalias_t *) _a;
free ((char *) a->name);
free ((char *) a->value);
free (a);
}
static const char *
cmd_alias_get_key (void *_a, void *unused)
{
cmdalias_t *a = (cmdalias_t *) _a;
return a->name;
}
static const char *
cmd_get_key (void *c, void *unused)
{
cmd_function_t *cmd = (cmd_function_t *) c;
return cmd->name;
}
static void
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Cmd_Runalias_f (void)
{
cmdalias_t *a;
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a = (cmdalias_t *) Hash_Find (cmd_alias_hash, Cmd_Argv (0));
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if (a) {
Cbuf_InsertText (cbuf_active, a->value);
return;
} else {
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Sys_Printf
("BUG: No alias found for registered command. Please report this to the QuakeForge development team.");
}
}
static void
Cmd_Alias_f (void)
{
cmdalias_t *alias;
char *cmd;
int i, c;
const char *s;
if (Cmd_Argc () == 1) {
Sys_Printf ("Current alias commands:\n");
for (alias = cmd_alias; alias; alias = alias->next)
Sys_Printf ("alias %s \"%s\"\n", alias->name, alias->value);
return;
}
s = Cmd_Argv (1);
// if the alias already exists, reuse it
alias = (cmdalias_t *) Hash_Find (cmd_alias_hash, s);
if (Cmd_Argc () == 2) {
if (alias)
Sys_Printf ("alias %s \"%s\"\n", alias->name, alias->value);
return;
}
if (alias)
free ((char *) alias->value);
else if (!Cmd_Exists (s)) {
cmdalias_t **a;
alias = calloc (1, sizeof (cmdalias_t));
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SYS_CHECKMEM (alias);
alias->name = strdup (s);
Hash_Add (cmd_alias_hash, alias);
for (a = &cmd_alias; *a; a = &(*a)->next)
if (strcmp ((*a)->name, alias->name) >= 0)
break;
alias->next = *a;
*a = alias;
Cmd_AddCommand (alias->name, Cmd_Runalias_f, "Alias command.");
} else {
Sys_Printf ("alias: a command with the name \"%s\" already exists.\n", s);
return;
}
// copy the rest of the command line
cmd = malloc (strlen (Cmd_Args (1)) + 2); // can never be longer
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SYS_CHECKMEM (cmd);
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 - 1)
strcat (cmd, " ");
}
alias->value = cmd;
}
static void
Cmd_UnAlias_f (void)
{
cmdalias_t *alias;
const char *s;
if (Cmd_Argc () != 2) {
Sys_Printf ("unalias <alias>: erase an existing alias\n");
return;
}
s = Cmd_Argv (1);
alias = Hash_Del (cmd_alias_hash, s);
if (alias) {
cmdalias_t **a;
Cmd_RemoveCommand (alias->name);
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for (a = &cmd_alias; *a != alias; a = &(*a)->next)
;
*a = alias->next;
free ((char *) alias->name);
free ((char *) alias->value);
free (alias);
} else {
Sys_Printf ("Unknown alias \"%s\"\n", s);
}
}
static void
Cmd_CmdList_f (void)
{
cmd_function_t *cmd;
int i;
int show_description = 0;
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if (Cmd_Argc () > 1)
show_description = 1;
for (cmd = cmd_functions, i = 0; cmd; cmd = cmd->next, i++) {
if (show_description) {
Sys_Printf ("%-20s :\n%s\n", cmd->name, cmd->description);
} else {
Sys_Printf ("%s\n", cmd->name);
}
}
Sys_Printf ("------------\n%d commands\n", i);
}
static void
Cmd_Help_f (void)
{
const char *name;
cvar_t *var;
cmd_function_t *cmd;
if (Cmd_Argc () != 2) {
Sys_Printf ("usage: help <cvar/command>\n");
return;
}
name = Cmd_Argv (1);
for (cmd = cmd_functions; cmd && strcasecmp (name, cmd->name);
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cmd = cmd->next);
if (cmd) {
Sys_Printf ("%s\n", cmd->description);
return;
}
var = Cvar_FindVar (name);
if (!var)
var = Cvar_FindAlias (name);
if (var) {
Sys_Printf ("%s\n", var->description);
return;
}
Sys_Printf ("variable/command not found\n");
}
static void
Cmd_Exec_f (void)
{
char *f;
int mark;
if (Cmd_Argc () != 2) {
Sys_Printf ("exec <filename> : execute a script file\n");
return;
}
mark = Hunk_LowMark ();
f = (char *) COM_LoadHunkFile (Cmd_Argv (1));
if (!f) {
Sys_Printf ("couldn't exec %s\n", Cmd_Argv (1));
return;
}
if (!Cvar_Command ()
&& (cmd_warncmd->int_val || (developer && developer->int_val)))
Sys_Printf ("execing %s\n", Cmd_Argv (1));
Cbuf_InsertText (cbuf_active, f);
Hunk_FreeToLowMark (mark);
}
/*
Cmd_Echo_f
Just prints the rest of the line to the console
*/
static void
Cmd_Echo_f (void)
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{
if (Cmd_Argc () == 2)
Sys_Printf ("%s\n", Cmd_Argv (1));
else
Sys_Printf ("%s\n", Cmd_Args (1));
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}
/* Pauses execution of the current stack until
next call of Cmd_Execute (usually next frame) */
static void
Cmd_Wait_f (void)
{
cbuf_active->state = CBUF_STATE_WAIT;
}
/* Pauses execution for a specified number
of seconds */
static void
Cmd_Sleep_f (void)
{
double waittime;
cbuf_t *p;
cbuf_active->state = CBUF_STATE_WAIT;
waittime = atof (Cmd_Argv (1));
for (p = cbuf_active; p->up; p = p->up); // Get to top of stack
p->resumetime = Sys_DoubleTime() + waittime;
}
void
Cmd_StuffCmds (cbuf_t *cbuf)
{
int i, j;
int s;
char *build, c;
char *cmdline;
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s = strlen (com_cmdline);
if (!s)
return;
cmdline = strdup (com_cmdline);
// pull out the commands
build = malloc (s + 1);
SYS_CHECKMEM (build);
build[0] = 0;
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for (i = 0; i < s - 1; i++) {
if (cmdline[i] == '+') {
i++;
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for (j = i; !((cmdline[j] == '+')
|| (cmdline[j] == '-'
&& (j == 0 || cmdline[j - 1] == ' '))
|| (cmdline[j] == 0)); j++);
c = cmdline[j];
cmdline[j] = 0;
strncat (build, cmdline + i, s - strlen (build));
strncat (build, "\n", s - strlen (build));
cmdline[j] = c;
i = j - 1;
}
}
if (build[0])
Cbuf_InsertText (cbuf, build);
free (build);
free (cmdline);
}
static void
Cmd_StuffCmds_f (void)
{
Cmd_StuffCmds (cbuf_active);
}
void
Cmd_Init_Hash (void)
{
cmd_hash = Hash_NewTable (1021, cmd_get_key, 0, 0);
cmd_alias_hash = Hash_NewTable (1021, cmd_alias_get_key, cmd_alias_free, 0);
}
void
Cmd_Init (void)
{
Cmd_AddCommand ("stuffcmds", Cmd_StuffCmds_f, "Execute the commands given "
"at startup again");
Cmd_AddCommand ("alias", Cmd_Alias_f, "Used to create a reference to a "
"command or list of commands.\n"
"When used without parameters, displays all current "
"aliases.\n"
"Note: Enclose multiple commands within quotes and "
"seperate each command with a semi-colon.");
Cmd_AddCommand ("unalias", Cmd_UnAlias_f, "Remove the selected alias");
Cmd_AddCommand ("cmdlist", Cmd_CmdList_f, "List all commands");
Cmd_AddCommand ("help", Cmd_Help_f, "Display help for a command or "
"variable");
Cmd_AddCommand ("exec", Cmd_Exec_f, "Execute a script file");
Cmd_AddCommand ("echo", Cmd_Echo_f, "Print text to console");
Cmd_AddCommand ("wait", Cmd_Wait_f, "Wait a game tic");
Cmd_AddCommand ("sleep", Cmd_Sleep_f, "Wait for a certain number of seconds.");
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cmd_warncmd = Cvar_Get ("cmd_warncmd", "0", CVAR_NONE, NULL, "Toggles the "
"display of error messages for unknown commands");
cmd_cbuf = Cbuf_New (&id_interp);
}
int
Cmd_ExecuteString (const char *text, cmd_source_t src)
{
cmd_source = src;
COM_TokenizeString (text, cmd_cbuf->args);
Cmd_Command (cmd_cbuf->args);
return 0;
}
void
Cmd_Exec_File (cbuf_t *cbuf, const char *path, int qfs)
{
char *f;
int len;
QFile *file;
if (!path || !*path)
return;
if (qfs) {
COM_FOpenFile (path, &file);
} else {
file = Qopen (path, "r");
}
if (file) {
len = Qfilesize (file);
f = (char *) malloc (len + 1);
if (f) {
f[len] = 0;
Qread (file, f, len);
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Cbuf_InsertText (cbuf, f);
free (f);
}
Qclose (file);
}
}