/* 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 $Id$ */ #ifdef HAVE_CONFIG_H # include #endif #include "sys.h" #include "cmd.h" #include "cvar.h" #include "sizebuf.h" #include "console.h" #include "qargs.h" #include "quakefs.h" #include "commdef.h" #include "zone.h" #include #include #ifdef HAVE_STRINGS_H #include #endif 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; qboolean cmd_wait; cvar_t *cl_warncmd; //============================================================================= /* ============ 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; byte cmd_text_buf[8192]; /* ============ Cbuf_Init ============ */ void Cbuf_Init (void) { cmd_text.data = cmd_text_buf; cmd_text.maxsize = sizeof(cmd_text_buf); } /* ============ Cbuf_AddText Adds command text at the end of the buffer ============ */ void Cbuf_AddText (char *text) { int l; l = strlen (text); if (cmd_text.cursize + l >= cmd_text.maxsize) { Con_Printf ("Cbuf_AddText: overflow\n"); return; } SZ_Write (&cmd_text, text, 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 ============ */ #if 0 // Tonik 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 = malloc (templen); 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); SZ_Write (&cmd_text, "\n", 1); // add the copied off data if (templen) { SZ_Write (&cmd_text, temp, templen); free (temp); } } #else void Cbuf_InsertText (char *text) { int textlen; textlen = strlen(text); if (cmd_text.cursize + 1 + textlen >= cmd_text.maxsize) { Con_Printf ("Cbuf_InsertText: overflow\n"); return; } if (!cmd_text.cursize) { memcpy (cmd_text.data, text, textlen); cmd_text.cursize = textlen; return; } // Move up to make room for inserted text memmove (cmd_text.data + textlen + 1, cmd_text.data, cmd_text.cursize); cmd_text.cursize += textlen + 1; // Insert new text memcpy (cmd_text.data, text, textlen); cmd_text.data[textlen] = '\n'; } #endif static void extract_line(char *line) { int i; char *text; int quotes; // 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' || text[i] == '\r') 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; memcpy (text, text+i, cmd_text.cursize); } } /* Cbuf_Execute */ void Cbuf_Execute (void) { char line[1024] = {0}; while (cmd_text.cursize) { extract_line (line); // execute the command line //Con_DPrintf("+%s\n",line), Cmd_ExecuteString (line); if (cmd_wait) { // skip out while text still remains in buffer, leaving it // for next frame cmd_wait = false; break; } } } /* Cbuf_Execute */ void Cbuf_Execute_Sets (void) { char line[1024] = {0}; while (cmd_text.cursize) { extract_line (line); // execute the command line if (strncmp(line,"set",3)==0 && isspace((int) line[3])) //Con_DPrintf("+%s\n",line), Cmd_ExecuteString (line); } } /* ============================================================================== 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 *build, c; s = strlen (com_cmdline); if (!s) return; // pull out the commands build = malloc (s+21); // LordHavoc: +21 instead of +1 to account for potential basedir expansion build[0] = 0; for (i=0 ; i : execute a script file\n"); return; } // FIXME: is this safe freeing the hunk here??? mark = Hunk_LowMark (); f = (char *)COM_LoadHunkFile (Cmd_Argv(1)); if (!f) { Con_Printf ("couldn't exec %s\n",Cmd_Argv(1)); return; } if (!Cvar_Command () && ((cl_warncmd && cl_warncmd->int_val) || (developer && developer->int_val))) 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 ; inext) 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)) { free (a->value); break; } } if (!a) { a = calloc (1, 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); } void Cmd_UnAlias_f (void) { cmdalias_t *a, *prev; char *s; if (Cmd_Argc() != 2) { Con_Printf ("unalias : erase an existing alias\n"); return; } s = Cmd_Argv(1); if (strlen(s) >= MAX_ALIAS_NAME) { Con_Printf ("Alias name is too long\n"); return; } prev = cmd_alias; for (a = cmd_alias ; a ; a = a->next) { if (!strcmp(s, a->name)) { free (a->value); prev->next = a->next; if (a == cmd_alias) cmd_alias = a->next; free (a); return; } prev = a; } Con_Printf ("Unknown alias \"%s\"\n", s); } /* ============================================================================= 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; static cmd_function_t *cmd_functions; // possible commands to execute /* ============ Cmd_Argc ============ */ int Cmd_Argc (void) { return cmd_argc; } /* ============ Cmd_Argv ============ */ char *Cmd_Argv (int arg) { if ( arg >= cmd_argc ) return cmd_null_string; return cmd_argv[arg]; } /* ============ Cmd_Args Returns a single string containing argv(1) to argv(argc()-1) ============ */ char *Cmd_Args (void) { if (!cmd_args) return ""; return cmd_args; } /* ============ Cmd_TokenizeString Parses the given string into command line tokens. ============ */ void Cmd_TokenizeString (char *text) { static char argv_buf[1024]; int argv_idx; argv_idx = 0; cmd_argc = 0; cmd_args = NULL; while (1) { // skip whitespace up to a /n while (*text && *(unsigned char*)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) { if (argv_idx + strlen(com_token) + 1 > 1024) { Con_Printf ("Cmd_TokenizeString: overflow\n"); return; } cmd_argv[cmd_argc] = argv_buf + argv_idx; strcpy (cmd_argv[cmd_argc], com_token); argv_idx += strlen(com_token) + 1; 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 (!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 (!strcmp (cmd_name,cmd->name)) return true; } return false; } /* ============ Cmd_CompleteCommand ============ */ char *Cmd_CompleteCommand (char *partial) { cmd_function_t *cmd; int len; cmdalias_t *a; 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; for (a=cmd_alias ; a ; a=a->next) if (!strcasecmp (partial, a->name)) return a->name; // check for partial match for (cmd=cmd_functions ; cmd ; cmd=cmd->next) if (!strncasecmp (partial, cmd->name, len)) return cmd->name; for (a=cmd_alias ; a ; a=a->next) if (!strncasecmp (partial, a->name, len)) return a->name; return NULL; } /* ============ Cmd_ExpandVariables Expand $fov-like expressions FIXME: better handling of buffer overflows? ============ */ // dest must point to a 1024-byte buffer void Cmd_ExpandVariables (char *data, char *dest) { unsigned int c; char buf[1024]; int i, len; cvar_t *var, *bestvar; int quotes = 0; len = 0; // parse a regular word while ( (c = *data) != 0) { if (c == '"') quotes++; if (c == '$' && !(quotes&1)) { data++; // Copy the text after '$' to a temp buffer i = 0; buf[0] = 0; bestvar = NULL; while ((c = *data) > 32) { if (c == '$') break; data++; buf[i++] = c; buf[i] = 0; if ((var = Cvar_FindVar(buf)) != 0) bestvar = var; if (i >= sizeof(buf)-1) break; } if (bestvar) { // check buffer size if (len + strlen(bestvar->string) >= 1024-1) break; strcpy(&dest[len], bestvar->string); len += strlen(bestvar->string); i = strlen(bestvar->name); while (buf[i]) dest[len++] = buf[i++]; } else { // no matching cvar name was found dest[len++] = '$'; if (len + strlen(buf) >= 1024-1) break; strcpy (&dest[len], buf); len += strlen(buf); } } else { dest[len] = c; data++; len++; if (len >= 1024-1) break; } }; dest[len] = 0; } /* ============ 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_function_t *cmd; cmdalias_t *a; char buf[1024]; #if 0 Cmd_TokenizeString (text); #else Cmd_ExpandVariables (text, buf); Cmd_TokenizeString (buf); #endif // execute the command line if (!Cmd_Argc()) return; // no tokens // check functions for (cmd=cmd_functions ; cmd ; cmd=cmd->next) { if (!strcasecmp (cmd_argv[0],cmd->name)) { if (!cmd->function) Cmd_ForwardToServer (); else cmd->function (); return; } } // Tonik: check cvars if (Cvar_Command()) return; // check alias for (a=cmd_alias ; a ; a=a->next) { if (!strcasecmp (cmd_argv[0], a->name)) { Cbuf_InsertText (a->value); return; } } if (cl_warncmd->int_val || developer->int_val) Con_Printf ("Unknown command \"%s\"\n", Cmd_Argv(0)); } /* ================ 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 (! strcasecmp (parm, Cmd_Argv (i))) return i; return 0; } void Cmd_CmdList_f (void) { cmd_function_t *cmd; int i; for (cmd=cmd_functions, i=0 ; cmd ; cmd=cmd->next, i++) { Con_Printf("%s\n", cmd->name); } Con_Printf ("------------\n%d commands\n", i); } /* ============ 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 ("unalias",Cmd_UnAlias_f); Cmd_AddCommand ("wait", Cmd_Wait_f); Cmd_AddCommand ("cmdlist", Cmd_CmdList_f); } char com_token[MAX_COM_TOKEN]; /* ============== COM_Parse Parse a token out of a string ============== */ char *COM_Parse (char *data) { unsigned int c; int len; len = 0; com_token[0] = 0; if (!data) return NULL; // skip whitespace skipwhite: while ( (c = *data) <= ' ') { if (c == 0) return NULL; // end of file; data++; } // skip // comments if (c=='/' && data[1] == '/') { while (*data && *data != '\n') data++; goto skipwhite; } // handle quoted strings specially if (c == '\"') { data++; while (1) { c = *data++; if (c=='\"' || !c) { com_token[len] = 0; return data; } com_token[len] = c; len++; } } // parse a regular word do { com_token[len] = c; data++; len++; if (len >= MAX_COM_TOKEN-1) break; c = *data; } while (c>32); com_token[len] = 0; return data; }