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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
*/
static const char rcsid[] =
"$Id$";
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <ctype.h>
#include "QF/cmd.h"
#include "QF/cvar.h"
#include "QF/hash.h"
#include "QF/qargs.h"
#include "QF/qendian.h"
#include "QF/sizebuf.h"
#include "QF/sys.h"
#include "QF/vfs.h"
#include "QF/zone.h"
#include "compat.h"
#include "QF/dstring.h"
typedef struct cmdalias_s {
struct cmdalias_s *next;
const char *name;
const char *value;
} cmdalias_t;
cmdalias_t *cmd_alias;
cmd_source_t cmd_source;
/* FIXME: All these separate buffers are sort of hacky
The command buffer interface should be generalized and
each part of QF (console, stufftext, config files and scripts)
that needs one should allocate and maintain its own.
*/
dstring_t *cmd_buffer; // Console buffer
dstring_t *cmd_legacybuffer; // Server stuffcmd buffer with absolute backwards-compatibility
dstring_t *cmd_activebuffer; // Buffer currently being executed
dstring_t *cmd_trueline; // The true, unadulterated line last tokenized
dstring_t *cmd_argbuf; // Buffer for reconstructing tokens into single string
qboolean cmd_wait = false;
qboolean cmd_legacy = false; // Are we executing current buffer in legacy mode?
int cmd_argc;
int cmd_maxargc = 0;
dstring_t **cmd_argv = 0;
int *cmd_args = 0;
int *cmd_argspace = 0;
cvar_t *cmd_warncmd;
cvar_t *cmd_highchars;
hashtab_t *cmd_alias_hash;
hashtab_t *cmd_hash;
//=============================================================================
/* Quick function to determine if a character is escaped */
qboolean
escaped (const char *str, int i)
{
int n, c;
if (!i)
return 0;
for (n = i-1, c = 0; n >= 0 && str[n] == '\\'; n--,c++);
return c & 1;
}
/* Quick function to escape stuff in a dstring */
void
escape (dstring_t *dstr)
{
int i;
for (i = 0; i < strlen(dstr->str); i++) {
switch (dstr->str[i]) {
case '\\':
case '$':
case '{':
case '}':
case '\"':
case '\'':
case '<':
case '>':
dstring_insertstr (dstr, "\\", i);
i++;
break;
}
}
}
/*
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
*/
byte cmd_text_buf[8192];
void
Cbuf_Init (void)
{
cmd_buffer = dstring_newstr ();
cmd_legacybuffer = dstring_newstr ();
cmd_activebuffer = cmd_buffer;
cmd_argbuf = dstring_newstr ();
cmd_trueline = dstring_newstr ();
}
void
Cbuf_AddTextTo (dstring_t *buffer, const char *text)
{
dstring_appendstr (buffer, text);
}
/*
Cbuf_AddText
Add text to the active buffer
*/
void
Cbuf_AddText (const char *text)
{
Cbuf_AddTextTo (cmd_activebuffer, text);
}
void
Cbuf_InsertTextTo (dstring_t *buffer, const char *text)
{
dstring_insertstr (buffer, "\n", 0);
dstring_insertstr (buffer, text, 0);
}
/* Cbuf_InsertText
Add text to the beginning of the active buffer
*/
void
Cbuf_InsertText (const char *text)
{
Cbuf_InsertTextTo (cmd_activebuffer, text);
}
/*
extract_line
Finds the next \n,\r, or ;-delimeted
line in the command buffer and copies
it into a buffer. Also shifts the rest
of the command buffer back to the start.
*/
void
extract_line (dstring_t *buffer, dstring_t *line)
{
int i, squotes = 0, dquotes = 0, braces = 0;
for (i = 0; buffer->str[i]; i++) {
if (buffer->str[i] == '\'' && !escaped(buffer->str,i) && !dquotes && !braces)
squotes^=1;
if (buffer->str[i] == '"' && !escaped(buffer->str,i) && !squotes && !braces)
dquotes^=1;
if (buffer->str[i] == ';' && !escaped(buffer->str,i) && !squotes && !dquotes && !braces)
break;
if (buffer->str[i] == '{' && !escaped(buffer->str,i) && !squotes && !dquotes)
braces++;
if (buffer->str[i] == '}' && !escaped(buffer->str,i) && !squotes && !dquotes)
braces--;
if (buffer->str[i] == '\n' || buffer->str[i] == '\r') {
if (braces)
dstring_snip(buffer, i, 1);
else
break;
}
}
if (i)
dstring_insert (line, buffer->str, i, 0);
if (buffer->str[i])
dstring_snip (buffer, 0, i + 1);
else // We've hit the end of the buffer, just clear it
dstring_clearstr (buffer);
}
/*
Cbuf_ExecuteBuffer
Extracts and executes each line in the
command buffer, until it is empty or
a wait command is executed
*/
void
Cbuf_ExecuteBuffer (dstring_t *buffer)
{
dstring_t *buf = dstring_newstr ();
dstring_t *temp = cmd_activebuffer; // save old context
cmd_activebuffer = buffer;
while (strlen(buffer->str)) {
extract_line (buffer, buf);
Cmd_ExecuteString(buf->str, src_command);
if (cmd_wait) {
cmd_wait = false;
break;
}
dstring_clearstr(buf);
}
dstring_delete (buf);
cmd_activebuffer = temp; // restore old context
}
void
Cbuf_Execute (void)
{
Cbuf_ExecuteBuffer (cmd_buffer); // Console buffer gets precedence
cmd_legacy = true;
Cbuf_ExecuteBuffer (cmd_legacybuffer); // Then legacy/stufftext buffer
cmd_legacy = false;
}
/*
Cbuf_Execute_Sets
Similar to Cbuf_Execute, but only
executes set and setrom commands. Used
for reading config files before the cmd
subsystem is entirely loaded.
*/
void
Cbuf_Execute_Sets (void)
{
dstring_t *buf = dstring_newstr ();
while (strlen(cmd_buffer->str)) {
extract_line (cmd_buffer, buf);
if (!strncmp (buf->str, "set", 3) && isspace ((int) buf->str[3])) {
Cmd_ExecuteString (buf->str, src_command);
} else if (!strncmp (buf->str, "setrom", 6) && isspace ((int) buf->str[6])) {
Cmd_ExecuteString (buf->str, src_command);
}
dstring_clearstr(buf);
}
dstring_delete (buf);
}
/*
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 + 1);
if (!build)
Sys_Error ("Cmd_StuffCmds_f: Memory Allocation Failure\n");
build[0] = 0;
for (i = 0; i < s - 1; i++) {
if (com_cmdline[i] == '+') {
i++;
for (j = i; !((com_cmdline[j] == '+')
|| (com_cmdline[j] == '-'
&& (j==0 || com_cmdline[j - 1] == ' '))
|| (com_cmdline[j] == 0)); j++);
c = com_cmdline[j];
com_cmdline[j] = 0;
strncat (build, com_cmdline + i, s - strlen (build));
strncat (build, "\n", s - strlen (build));
com_cmdline[j] = c;
i = j - 1;
}
}
// Sys_Printf("[\n%s]\n",build);
if (build[0])
Cbuf_InsertText (build);
free (build);
}
void
Cmd_Exec_File (const char *path)
{
char *f;
int len;
VFile *file;
if (!path || !*path)
return;
if ((file = Qopen (path, "r")) != NULL) {
len = COM_filelength (file);
f = (char *) malloc (len + 1);
if (f) {
f[len] = 0;
Qread (file, f, len);
Qclose (file);
Cbuf_InsertTextTo (cmd_buffer, f); // Always insert into console
free (f);
}
}
}
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;
}
Cbuf_InsertTextTo (cmd_buffer, f); // Always insert into console
Hunk_FreeToLowMark (mark);
if (!Cvar_Command () && (cmd_warncmd->int_val
|| (developer && developer->int_val)))
Sys_Printf ("execing %s\n", Cmd_Argv (1));
}
/*
Cmd_Echo_f
Just prints the rest of the line to the console
*/
void
Cmd_Echo_f (void)
{
Sys_Printf ("%s\n", Cmd_Args (1));
}
/*
Cmd_Alias_f
Creates a new command that executes a command string (possibly ; seperated)
*/
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 (alias) {
free ((char*)alias->value);
} else {
cmdalias_t **a;
alias = calloc (1, sizeof (cmdalias_t));
if (!alias)
Sys_Error ("Cmd_Alias_f: Memory Allocation Failure\n");
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;
}
// copy the rest of the command line
cmd = malloc (strlen (Cmd_Args (1)) + 2);// can never be longer
if (!cmd)
Sys_Error ("Cmd_Alias_f: Memory Allocation Failure\n");
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;
}
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;
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);
}
}
/*
COMMAND EXECUTION
*/
typedef struct cmd_function_s {
struct cmd_function_s *next;
const char *name;
xcommand_t function;
const char *description;
} cmd_function_t;
static cmd_function_t *cmd_functions; // possible commands to execute
int
Cmd_Argc (void)
{
return cmd_argc;
}
const char *
Cmd_Argv (int arg)
{
if (arg >= cmd_argc)
return "";
return cmd_argv[arg]->str;
}
/*
Cmd_Args
Returns a single string containing argv(start) to argv(argc()-1)
*/
const char *
Cmd_Args (int start)
{
if (start >= cmd_argc)
return "";
return cmd_argbuf->str + cmd_args[start];
}
int
Cmd_EndDoubleQuote (const char *str)
{
int i;
for (i = 1; i < strlen(str); i++) {
if (str[i] == '\"' && !escaped(str,i))
return i;
}
return -1; // Not found
}
int
Cmd_EndSingleQuote (const char *str)
{
int i;
for (i = 1; i < strlen(str); i++) {
if (str[i] == '\'' && !escaped(str,i))
return i;
}
return -1; // Not found
}
int
Cmd_EndBrace (const char *str)
{
int i, n;
for (i = 1; i < strlen(str); i++) {
if (str[i] == '{' && !escaped(str,i)) {
n = Cmd_EndBrace (str + i);
if (n < 0)
return n;
else
i += n;
}
else if (str[i] == '\"' && !escaped(str,i)) {
n = Cmd_EndDoubleQuote (str + i);
if (n < 0)
return n;
else
i += n;
}
else if (str[i] == '\'' && !escaped(str,i)) {
n = Cmd_EndSingleQuote (str + i);
if (n < 0)
return n;
else
i += n;
}
else if (str[i] == '}' && !escaped(str,i))
return i;
}
return -1; // No matching brace found
}
int
Cmd_GetToken (const char *str)
{
int i;
switch (*str) {
case '\'':
return Cmd_EndSingleQuote (str);
case '\"':
return Cmd_EndDoubleQuote (str);
case '{':
return Cmd_EndBrace (str);
case '}':
return -1;
default:
for (i = 0; i < strlen(str); i++)
if (isspace(str[i]))
break;
return i;
}
return -1; // We should never get here
}
int tag_shift = 0;
int tag_special = 0;
struct stable_s {char a, b;} stable1[] =
{
{'f', 0x0D}, // Fake message
{'[', 0x90}, // Gold braces
{']', 0x91},
{'(', 0x80}, // Scroll bar characters
{'=', 0x81},
{')', 0x82},
{'|', 0x83},
{'<', 0x9D}, // Vertical line characters
{'-', 0x9E},
{'>', 0x9F},
{'.', 0x05}, // White dot
{'#', 0x0B}, // White block
{'a', 0x7F}, // White arrow. DO NOT USE WITH <b> TAG IN ANYTHING SENT TO SERVER. PERIOD.
{'A', 0x8D}, // Brown arrow
{'0', 0x92}, // Golden numbers
{'1', 0x93},
{'2', 0x94},
{'3', 0x95},
{'4', 0x96},
{'5', 0x97},
{'6', 0x98},
{'7', 0x99},
{'8', 0x9A},
{'9', 0x9B},
{0, 0}
};
/*
Cmd_ProcessTags
Looks for html-like tags in a dstring and
modifies the string accordingly
FIXME: This has become messy. Create tag.[ch]
and write a more generalized tag parser using
callbacks
*/
void
Cmd_ProcessTags (dstring_t *dstr)
{
int close = 0, ignore = 0, i, n, c;
for (i = 0; i < strlen(dstr->str); i++) {
if (dstr->str[i] == '<' && !escaped(dstr->str,i)){
close = 0;
for (n = 1; dstr->str[i+n] != '>' || escaped(dstr->str, i+n); n++)
if (dstr->str[n] == 0)
return;
if (dstr->str[i+1] == '/')
close = 1;
if (!strncmp(dstr->str+i+close+1, "i", 1)) {
if (ignore && !close) // If we are ignoring, ignore a non close
continue;
else if (close && ignore) // If we are closing, turn off ignore
ignore--;
else if (!close)
ignore++; // Otherwise, turn ignore on
}
else if (ignore) // If ignore isn't being changed and we are ignore, go on
continue;
else if (!strncmp(dstr->str+i+close+1, "b", 1))
tag_shift = close ? tag_shift - 1 : tag_shift + 1;
else if (!strncmp(dstr->str+i+close+1, "s", 1))
tag_special = close ? tag_special - 1 : tag_special + 1;
if (tag_shift < 0)
tag_shift = 0;
if (tag_special < 0)
tag_special = 0;
dstring_snip(dstr, i, n+1);
i--;
continue;
}
c = dstr->str[i];
/* This ignores escape characters, unless it is itself escaped */
if (c == '\\' && (!i || dstr->str[i-1] != '\\'))
continue;
if (tag_special) {
for (n = 0; stable1[n].a; n++)
if (c == stable1[n].a)
c = dstr->str[i] = stable1[n].b;
}
if (tag_shift && c < 128)
c = (dstr->str[i] += 128);
}
}
/*
Cmd_ProcessVariables
Looks for occurances of ${varname} and
replaces them with the contents of the
variable.
*/
void
Cmd_ProcessVariables (dstring_t *dstr)
{
dstring_t *varname;
cvar_t *var;
int i, n;
varname = dstring_newstr ();
for (i = 0; i < strlen(dstr->str); i++) {
if (dstr->str[i] == '$' && dstr->str[i+1] == '{' && !escaped(dstr->str,i)) {
for (n = 0; dstr->str[i+n] != '}'; n++)
if (!dstr->str[i+n])
return; // Open curly braces, give up
/* Copy text between braces into a buffer */
dstring_clearstr (varname);
dstring_insert (varname, dstr->str+i+2, n-2, 0);
var = 0;
var = Cvar_FindVar(varname->str);
dstring_snip (dstr, i, n+1); // Nuke it, even if no match is found
if (var) {// Do we have a match?
dstring_insertstr (dstr, var->string, i); // Stick in the value of variable
i += strlen(var->string) - 1;
}
}
}
dstring_delete (varname);
}
/*
Cmd_ProcessEscapes
Looks for the escape character \ and
removes it. Special cases exist for
\\ and \n; otherwise, it is simply
filtered. This should be the last
step in the parser so that quotes,
tags, etc. can be escaped
*/
void
Cmd_ProcessEscapes (dstring_t *dstr)
{
int i;
for (i = 0; i < strlen(dstr->str); i++) {
if (dstr->str[i] == '\\' && dstr->str[i+1]) {
dstring_snip(dstr, i, 1);
if (dstr->str[i] == '\\')
i++;
if (dstr->str[i] == 'n')
dstr->str[i] = '\n';
i--;
}
}
}
/*
Cmd_ProcessPercents
Replaces %i with Cmd_Argv(i)
*/
void
Cmd_ProcessPercents (dstring_t *dstr)
{
int i, n;
long int num;
for (i = 0; i < strlen(dstr->str); i++) {
if (dstr->str[i] == '%') {
if (dstr->str[i+1] == '%') {
dstring_snip (dstr, i, 1);
continue;
}
for (n = 1; isdigit(dstr->str[i+n]); n++);
if (n < 2)
continue;
num = strtol(dstr->str+i+1, 0, 10);
dstring_snip (dstr, i, n);
dstring_insertstr (dstr, Cmd_Argv(num), i);
}
}
}
/*
Cmd_TokenizeString
This takes a normal string, parses it
into tokens, runs various filters on
each token, and recombines them with the
correct white space into a string for
the purpose of executing a console
command. If the string begins with a \,
filters are not run and the \ is stripped.
Anything that stuffs commands into the
console that requires absolute backwards
compatibility should be changed to prepend
it with a \. An example of this is
fullserverinfo, which requires that \
be left alone since it is the delimeter
for info keys.
*/
void
Cmd_TokenizeString (const char *text, qboolean filter)
{
int i = 0, n, len = 0, quotes, braces, space;
const char *str = text;
cmd_argc = 0;
/* Turn off tags at the beginning of a command.
This causes tags to continue past token boundaries. */
tag_shift = 0;
tag_special = 0;
if (text[0] == '|')
str++;
while (strlen(str + i)) {
space = 0;
while (isspace(str[i])) {
i++;
space++;
}
len = Cmd_GetToken (str + i);
if (len < 0) {
Sys_Printf ("Parse error: Unmatched quotes, braces, or double quotes in following line:\n--> %s\n", text);
cmd_argc = 0;
break;
}
else if (len == 0)
break;
cmd_argc++;
if (cmd_argc > cmd_maxargc) {
cmd_argv = realloc(cmd_argv, sizeof(dstring_t *)*cmd_argc);
if (!cmd_argv)
Sys_Error ("Cmd_TokenizeString: Failed to reallocate memory.\n");
cmd_args = realloc(cmd_args, sizeof(int)*cmd_argc);
if (!cmd_args)
Sys_Error ("Cmd_TokenizeString: Failed to reallocate memory.\n");
cmd_argspace = realloc(cmd_argspace, sizeof(int)*cmd_argc);
if (!cmd_argspace)
Sys_Error ("Cmd_TokenizeString: Failed to reallocate memory.\n");
cmd_argv[cmd_argc-1] = dstring_newstr ();
cmd_maxargc++;
}
dstring_clearstr(cmd_argv[cmd_argc-1]);
cmd_argspace[cmd_argc-1] = space;
/* Remove surrounding quotes or double quotes or braces*/
quotes = 0;
braces = 0;
if ((str[i] == '\'' && str[i+len] == '\'') || (str[i] == '"' && str[i+len] == '"')) {
i++;
len-=1;
quotes = 1;
}
if (str[i] == '{' && str[i+len] == '}') {
i++;
len-=1;
braces = 1;
}
dstring_insert(cmd_argv[cmd_argc-1], str + i, len, 0);
if (filter && text[0] != '|') {
if (!braces) {
Cmd_ProcessTags(cmd_argv[cmd_argc-1]);
Cmd_ProcessVariables(cmd_argv[cmd_argc-1]);
}
Cmd_ProcessEscapes(cmd_argv[cmd_argc-1]);
}
i += len + quotes + braces; /* If we ended on a quote or brace, skip it */
}
/* Now we must reconstruct cmd_args */
dstring_clearstr (cmd_argbuf);
for (i = 0; i < cmd_argc; i++) {
for (n = 0; n < cmd_argspace[i]; n++)
dstring_appendstr (cmd_argbuf," ");
cmd_args[i] = strlen(cmd_argbuf->str);
dstring_appendstr (cmd_argbuf, cmd_argv[i]->str);
}
dstring_clearstr (cmd_trueline);
dstring_appendstr (cmd_trueline, text);
}
void
Cmd_AddCommand (const char *cmd_name, xcommand_t function, const char *description)
{
cmd_function_t *cmd;
cmd_function_t **c;
// fail if the command is a variable name
if (Cvar_FindVar (cmd_name)) {
Sys_Printf ("Cmd_AddCommand: %s already defined as a var\n", cmd_name);
return;
}
// 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;
}
cmd = malloc (sizeof (cmd_function_t));
if (!cmd)
Sys_Error ("Cmd_AddCommand: Memory_Allocation_Failure\n");
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;
}
qboolean
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;
}
const char *
Cmd_CompleteCommand (const 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_CompleteCountPossible
New function for tab-completion system
Added by EvilTypeGuy
Thanks to Fett erich@heintz.com
Thanks to taniwha
*/
int
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 **
Cmd_CompleteBuildList (const char *partial)
{
cmd_function_t *cmd;
int len = 0;
int bpos = 0;
int sizeofbuf = (Cmd_CompleteCountPossible (partial) + 1) * sizeof (char *);
const char **buf;
len = strlen(partial);
buf = malloc(sizeofbuf + sizeof (char *));
if (!buf)
Sys_Error ("Cmd_CompleteBuildList: Memory Allocation Failure\n");
// 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;
}
/*
Cmd_CompleteAlias
New function for tab-completion system
Added by EvilTypeGuy
Thanks to Fett erich@heintz.com
Thanks to taniwha
*/
const char *
Cmd_CompleteAlias (const char * partial)
{
cmdalias_t *alias;
int len;
len = strlen(partial);
if (!len)
return NULL;
// Check functions
for (alias = cmd_alias; alias; alias = alias->next)
if (!strncasecmp(partial, alias->name, len))
return alias->name;
return NULL;
}
/*
Cmd_CompleteAliasCountPossible
New function for tab-completion system
Added by EvilTypeGuy
Thanks to Fett erich@heintz.com
Thanks to taniwha
*/
int
Cmd_CompleteAliasCountPossible (const char *partial)
{
cmdalias_t *alias;
int len;
int h;
h = 0;
len = strlen(partial);
if (!len)
return 0;
// Loop through the command list and count all partial matches
for (alias = cmd_alias; alias; alias = alias->next)
if (!strncasecmp(partial, alias->name, len))
h++;
return h;
}
/*
Cmd_CompleteAliasBuildList
New function for tab-completion system
Added by EvilTypeGuy
Thanks to Fett erich@heintz.com
Thanks to taniwha
*/
const char **
Cmd_CompleteAliasBuildList (const char *partial)
{
cmdalias_t *alias;
int len = 0;
int bpos = 0;
int sizeofbuf = (Cmd_CompleteAliasCountPossible (partial) + 1) *
sizeof (char *);
const char **buf;
len = strlen(partial);
buf = malloc(sizeofbuf + sizeof (char *));
if (!buf)
Sys_Error ("Cmd_CompleteAliasBuildList: Memory Allocation Failure\n");
// Loop through the alias list and print all matches
for (alias = cmd_alias; alias; alias = alias->next)
if (!strncasecmp(partial, alias->name, len))
buf[bpos++] = alias->name;
buf[bpos] = NULL;
return buf;
}
/*
Cmd_ExecuteString
A complete command line has been parsed, so try to execute it
*/
void
Cmd_ExecuteString (const char *text, cmd_source_t src)
{
cmd_function_t *cmd;
cmdalias_t *a;
cmd_source = src;
Cmd_TokenizeString (text, !cmd_legacy);
// execute the command line
if (!Cmd_Argc ())
return; // no tokens
// check functions
cmd = (cmd_function_t*)Hash_Find (cmd_hash, cmd_argv[0]->str);
if (cmd) {
if (cmd->function)
cmd->function ();
return;
}
// Tonik: check cvars
if (Cvar_Command ())
return;
// check alias
a = (cmdalias_t*)Hash_Find (cmd_alias_hash, cmd_argv[0]->str);
if (a) {
dstring_t *temp = dstring_newstr ();
dstring_appendstr (temp, a->value);
Cmd_ProcessPercents (temp);
Cbuf_InsertText (temp->str);
dstring_delete (temp);
return;
}
if (cmd_warncmd->int_val || developer->int_val)
Sys_Printf ("Unknown command \"%s\"\n", Cmd_Argv (0));
cmd_argc = 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 (const 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;
int show_description = 0;
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);
}
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);
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");
}
/*
Scripting commands
The following functions are commands for enhanced scripting
*/
void
Cmd_If_f (void) {
long int num;
if (Cmd_Argc() < 3) {
Sys_Printf("Usage: if {condition} {commands}\n");
return;
}
num = strtol (Cmd_Argv(1), 0, 10);
if (num)
Cbuf_InsertText (Cmd_Argv(2));
return;
}
void
Cmd_While_f (void) {
long int num;
if (Cmd_Argc() < 3) {
Sys_Printf("Usage: while {condition} {commands}\n");
return;
}
num = strtol (Cmd_Argv(1), 0, 10);
if (num) {
Cbuf_InsertText (cmd_trueline->str); // Run while loop again
Cbuf_InsertText (Cmd_Argv(2)); // But not before executing body
}
return;
}
void
Cmd_Hash_Stats_f (void)
{
Sys_Printf ("alias hash table:\n");
Hash_Stats (cmd_alias_hash);
Sys_Printf ("command hash table:\n");
Hash_Stats (cmd_hash);
}
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;
}
/*
Cmd_Init_Hash
initialise the command and alias hash tables
*/
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)
{
// register our commands
Cmd_AddCommand ("stuffcmds", Cmd_StuffCmds_f, "Execute the commands given "
"at startup again");
Cmd_AddCommand ("exec", Cmd_Exec_f, "Execute a script file");
Cmd_AddCommand ("echo", Cmd_Echo_f, "Print text to console");
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 ("wait", Cmd_Wait_f, "Wait a game tic");
Cmd_AddCommand ("cmdlist", Cmd_CmdList_f, "List all commands");
Cmd_AddCommand ("help", Cmd_Help_f, "Display help for a command or "
"variable");
Cmd_AddCommand ("if", Cmd_If_f, "Conditionally execute a set of commands.");
Cmd_AddCommand ("while", Cmd_While_f, "Execute a set of commands while a condition is true.");
//Cmd_AddCommand ("cmd_hash_stats", Cmd_Hash_Stats_f, "Display statistics "
// "alias and command hash tables");
cmd_warncmd = Cvar_Get ("cmd_warncmd", "0", CVAR_NONE, NULL, "Toggles the "
"display of error messages for unknown commands");
}
char *com_token;
static size_t com_token_size;
static inline void
write_com_token (size_t pos, char c)
{
if (pos + 1 <= com_token_size) {
write:
com_token[pos] = c;
return;
}
com_token_size = (pos + 1024) & ~1023;
com_token = realloc (com_token, com_token_size);
if (!com_token)
Sys_Error ("COM_Parse: could not allocate %ld bytes",
(long)com_token_size);
goto write;
}
/*
COM_Parse
Parse a token out of a string
*/
const char *
COM_Parse (const char *_data)
{
const byte *data = (const byte *)_data;
unsigned int c;
size_t len = 0;
write_com_token (len, 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) {
write_com_token (len, 0);
return c ? data : data - 1;
}
write_com_token (len, c);
len++;
}
}
// parse a regular word
do {
write_com_token (len, c);
data++;
len++;
c = *data;
} while (c > 32);
write_com_token (len, 0);
return data;
}
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