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/*
commands.c : irssi
Copyright (C) 1999-2000 Timo Sirainen
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 the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "module.h"
#include "modules.h"
#include "signals.h"
#include "commands.h"
#include "misc.h"
#include "server.h"
#include "server-redirect.h"
#include "special-vars.h"
#include "lib-config/iconfig.h"
#include "settings.h"
#define alias_find(alias) \
iconfig_get_str("aliases", alias, NULL)
GSList *commands;
char *current_command;
static GSList *cmdget_funcs;
static int signal_default_command;
void command_bind_to(int pos, const char *cmd, const char *category, SIGNAL_FUNC func)
{
COMMAND_REC *rec;
char *str;
g_return_if_fail(cmd != NULL);
rec = g_new0(COMMAND_REC, 1);
rec->cmd = g_strdup(cmd);
rec->category = category == NULL ? NULL : g_strdup(category);
commands = g_slist_append(commands, rec);
if (func != NULL) {
str = g_strconcat("command ", cmd, NULL);
signal_add_to(MODULE_NAME, pos, str, func);
g_free(str);
}
signal_emit("commandlist new", 1, rec);
}
void command_free(COMMAND_REC *rec)
{
commands = g_slist_remove(commands, rec);
signal_emit("commandlist remove", 1, rec);
g_free_not_null(rec->category);
g_free(rec->cmd);
g_free(rec);
}
void command_unbind(const char *cmd, SIGNAL_FUNC func)
{
GSList *tmp;
char *str;
g_return_if_fail(cmd != NULL);
for (tmp = commands; tmp != NULL; tmp = tmp->next) {
COMMAND_REC *rec = tmp->data;
if (g_strcasecmp(rec->cmd, cmd) == 0) {
command_free(rec);
break;
}
}
if (func != NULL) {
str = g_strconcat("command ", cmd, NULL);
signal_remove(str, func);
g_free(str);
}
}
void command_runsub(const char *cmd, const char *data, void *p1, void *p2)
{
char *subcmd, *defcmd, *args;
g_return_if_fail(data != NULL);
/* get command.. */
subcmd = g_strdup_printf("command %s %s", cmd, data);
args = strchr(subcmd+9 + strlen(cmd), ' ');
if (args != NULL) *args++ = '\0'; else args = "";
while (*args == ' ') args++;
g_strdown(subcmd);
if (!signal_emit(subcmd, 3, args, p1, p2)) {
defcmd = g_strdup_printf("default command %s", cmd);
if (!signal_emit(defcmd, 3, data, p1, p2))
signal_emit("unknown command", 3, strchr(subcmd, ' ')+1, p1, p2);
g_free(defcmd);
}
g_free(subcmd);
}
COMMAND_REC *command_find(const char *command)
{
GSList *tmp;
int len;
for (tmp = commands; tmp != NULL; tmp = tmp->next) {
COMMAND_REC *rec = tmp->data;
if (g_strcasecmp(rec->cmd, command) == 0)
return rec;
}
return NULL;
}
char *cmd_get_param(char **data)
{
char *pos;
g_return_val_if_fail(data != NULL, NULL);
g_return_val_if_fail(*data != NULL, NULL);
while (**data == ' ') (*data)++;
pos = *data;
while (**data != '\0' && **data != ' ') (*data)++;
if (**data == ' ') *(*data)++ = '\0';
return pos;
}
char *cmd_get_quoted_param(char **data)
{
char *pos, quote;
g_return_val_if_fail(data != NULL, NULL);
g_return_val_if_fail(*data != NULL, NULL);
while (**data == ' ') (*data)++;
if (**data != '\'' && **data != '"')
return cmd_get_param(data);
quote = **data; (*data)++;
pos = *data;
while (**data != '\0' && **data != quote) {
if (**data == '\\' && (*data)[1] != '\0')
g_memmove(*data, (*data)+1, strlen(*data));
(*data)++;
}
if (**data != '\0') *(*data)++ = '\0';
return pos;
}
static char *get_opt_args(char **data)
{
/* -cmd1 -cmd2 -cmd3 ... */
char *p, *ret;
int stopnext;
g_return_val_if_fail(data != NULL, NULL);
g_return_val_if_fail(*data != NULL, NULL);
stopnext = FALSE;
ret = NULL;
for (p = *data;;) {
if (*p != '-' || stopnext) {
if (p == *data) return "";
ret = *data;
*data = p;
while (isspace(p[-1]) && p > ret) p--;
if (*p != '\0') *p = '\0';
return ret;
}
if (p[1] == '-') {
/* -- argument means end of arguments even if
next word starts with - */
stopnext = TRUE;
}
while (!isspace(*p) && *p != '\0') p++;
while (isspace(*p)) p++;
}
}
static void cmd_params_pack(char ***subargs, char *end, char *start, char *newstart)
{
char ***tmp;
char *data;
int bufsize, datalen, len;
bufsize = (int) (end-newstart)+1;
data = g_malloc(bufsize); datalen = 0;
for (tmp = subargs; *tmp != NULL; tmp++) {
if (**tmp < start || **tmp > end)
continue;
len = strlen(**tmp)+1;
if (datalen+len > bufsize)
g_error("cmd_params_pack() : buffer overflow!");
memcpy(data+datalen, **tmp, len);
**tmp = newstart+datalen;
datalen += len;
}
g_memmove(newstart, data, datalen);
g_free(data);
}
int arg_find(char **array, const char *item)
{
char **tmp;
int index;
g_return_val_if_fail(array != NULL, 0);
g_return_val_if_fail(item != NULL, 0);
index = 0;
for (tmp = array; *tmp != NULL; tmp++, index++) {
if (g_strcasecmp(*tmp + (**tmp == '@'), item) == 0)
return index;
}
return -1;
}
static int get_multi_args(char **data, int checkonly, va_list va)
{
/* -cmd1 arg1 -cmd2 "argument two" -cmd3 */
GString *returnargs;
char **args, **arglist, *arg, *origdata;
char **nextarg, ***subargs;
int eat, pos;
eat = 0;
args = (char **) va_arg(va, char **);
g_return_val_if_fail(args != NULL && *args != NULL && **args != '\0', 0);
arglist = g_strsplit(*args, " ", -1);
eat = strarray_length(arglist);
subargs = g_new(char **, eat+1);
for (pos = 0; pos < eat; pos++) {
subargs[pos] = (char **) va_arg(va, char **);
if (subargs[pos] == NULL) {
g_free(subargs);
g_warning("get_multi_args() : subargument == NULL");
return eat;
}
*subargs[pos] = "";
}
subargs[eat] = NULL;
origdata = *data;
returnargs = g_string_new(NULL);
nextarg = NULL;
for (;;) {
if (**data == '-') {
(*data)++;
if (**data == '-') {
/* -- argument means end of arguments even
if next word starts with - */
(*data)++;
while (isspace(**data)) (*data)++;
break;
}
arg = cmd_get_param(data);
g_string_sprintfa(returnargs, "-%s ", arg);
/* check if this argument can have parameter */
pos = arg_find(arglist, arg);
nextarg = pos == -1 ? NULL : subargs[pos];
while (isspace(**data)) (*data)++;
continue;
}
if (nextarg == NULL)
break;
if (*arglist[pos] == '@' && !isdigit(**data))
break; /* expected a numeric argument */
/* save the sub-argument to `nextarg' */
arg = cmd_get_quoted_param(data);
*nextarg = arg; nextarg = NULL;
while (isspace(**data)) (*data)++;
}
if (!checkonly) {
/* ok, this is a bit stupid. this will pack the arguments in
`data' like "-arg1 subarg -arg2 sub2\0" ->
"-arg1 -arg2\0subarg\0sub2\0" this is because it's easier
to free only _one_ string instead of two (`args') when
using PARAM_FLAG_MULTIARGS. */
if (returnargs->len == 0)
*args = "";
else {
cmd_params_pack(subargs, **data == '\0' ? *data : (*data)-1,
origdata, origdata+returnargs->len);
g_string_truncate(returnargs, returnargs->len-1);
strcpy(origdata, returnargs->str);
*args = origdata;
}
}
g_string_free(returnargs, TRUE);
g_strfreev(arglist);
g_free(subargs);
return eat;
}
char *cmd_get_callfuncs(const char *data, int *count, va_list *args)
{
CMD_GET_FUNC func;
GSList *tmp;
char *ret, *old;
ret = g_strdup(data);
for (tmp = cmdget_funcs; tmp != NULL; tmp = tmp->next) {
func = (CMD_GET_FUNC) tmp->data;
old = ret;
ret = func(ret, count, args);
g_free(old);
}
return ret;
}
char *cmd_get_params(const char *data, int count, ...)
{
char **str, *arg, *datad, *old;
va_list args;
int cnt, eat, len;
g_return_val_if_fail(data != NULL, NULL);
va_start(args, count);
/* get the length of the arguments in string */
if ((count & (PARAM_FLAG_MULTIARGS|PARAM_FLAG_OPTARGS)) == 0)
len = 0;
else {
old = datad = g_strdup(data);
if (count & PARAM_FLAG_MULTIARGS)
get_multi_args(&datad, TRUE, args);
else
get_opt_args(&datad);
len = (int) (datad-old);
g_free(old);
}
/* send the text to custom functions to handle - skip arguments */
old = datad = cmd_get_callfuncs(data+len, &count, &args);
if (len > 0) {
/* put the arguments + the new data to one string */
datad = g_malloc(len+1 + strlen(old)+1);
memcpy(datad, data, len);
datad[len] = ' ';
memcpy(datad+len+1, old, strlen(old)+1);
g_free(old);
old = datad;
}
/* and now handle the string */
cnt = PARAM_WITHOUT_FLAGS(count);
while (cnt-- > 0) {
if (count & PARAM_FLAG_MULTIARGS) {
eat = get_multi_args(&datad, FALSE, args)+1;
count &= ~PARAM_FLAG_MULTIARGS;
cnt -= eat-1;
while (eat-- > 0)
str = (char **) va_arg(args, char **);
continue;
} else if (count & PARAM_FLAG_OPTARGS) {
arg = get_opt_args(&datad);
count &= ~PARAM_FLAG_OPTARGS;
} else if (cnt == 0 && count & PARAM_FLAG_GETREST) {
/* get rest */
arg = datad;
} else {
arg = (count & PARAM_FLAG_NOQUOTES) ?
cmd_get_param(&datad) :
cmd_get_quoted_param(&datad);
}
str = (char **) va_arg(args, char **);
if (str != NULL) *str = arg;
}
va_end(args);
return old;
}
void cmd_get_add_func(CMD_GET_FUNC func)
{
cmdget_funcs = g_slist_prepend(cmdget_funcs, (void *) func);
}
void cmd_get_remove_func(CMD_GET_FUNC func)
{
cmdget_funcs = g_slist_prepend(cmdget_funcs, (void *) func);
}
static void parse_command(const char *command, int expand_aliases, SERVER_REC *server, void *item)
{
const char *alias;
char *cmd, *str, *args, *oldcmd;
cmd = str = g_strconcat("command ", command, NULL);
args = strchr(cmd+8, ' ');
if (args != NULL) *args++ = '\0'; else args = "";
/* check if there's an alias for command */
alias = expand_aliases ? alias_find(cmd+8) : NULL;
if (alias != NULL)
eval_special_string(alias, args, server, item);
else {
if (server != NULL)
server_redirect_default((SERVER_REC *) server, cmd);
g_strdown(cmd);
oldcmd = current_command;
current_command = cmd+8;
if (!signal_emit(cmd, 3, args, server, item))
signal_emit_id(signal_default_command, 3, command, server, item);
current_command = oldcmd;
}
g_free(str);
}
static void event_command(const char *line, SERVER_REC *server, void *item)
{
char *cmdchar;
int expand_aliases = TRUE;
g_return_if_fail(line != NULL);
if (*line == '\0') {
/* empty line, forget it. */
signal_stop();
return;
}
cmdchar = strchr(settings_get_str("cmdchars"), *line);
if (cmdchar != NULL && line[1] == ' ') {
/* "/ text" = same as sending "text" to active channel. */
line += 2;
cmdchar = NULL;
}
if (cmdchar == NULL) {
/* non-command - let someone else handle this */
signal_emit("send text", 3, line, server, item);
return;
}
/* same cmdchar twice ignores aliases ignores aliases */
line++;
if (*line == *cmdchar) {
line++;
expand_aliases = FALSE;
}
parse_command(line, expand_aliases, server, item);
}
static void cmd_eval(const char *data, SERVER_REC *server, void *item)
{
g_return_if_fail(data != NULL);
eval_special_string(data, "", server, item);
}
static void cmd_cd(const char *data)
{
char *str;
g_return_if_fail(data != NULL);
if (*data == '\0') return;
str = convert_home(data);
chdir(str);
g_free(str);
}
static void cmd_rehash(const char *data)
{
char *fname;
fname = *data != '\0' ? g_strdup(data) :
g_strdup_printf("%s/.irssi/config", g_get_home_dir());
settings_reread(fname);
g_free(fname);
}
static void cmd_save(const char *data)
{
settings_save(*data != '\0' ? data : NULL);
}
void commands_init(void)
{
commands = NULL;
cmdget_funcs = NULL;
current_command = NULL;
signal_default_command = module_get_uniq_id_str("signals", "default command");
settings_add_str("misc", "cmdchars", "/");
signal_add("send command", (SIGNAL_FUNC) event_command);
command_bind("eval", NULL, (SIGNAL_FUNC) cmd_eval);
command_bind("cd", NULL, (SIGNAL_FUNC) cmd_cd);
command_bind("rehash", NULL, (SIGNAL_FUNC) cmd_rehash);
command_bind("save", NULL, (SIGNAL_FUNC) cmd_save);
}
void commands_deinit(void)
{
g_free_not_null(current_command);
g_slist_free(cmdget_funcs);
signal_remove("send command", (SIGNAL_FUNC) event_command);
command_unbind("eval", (SIGNAL_FUNC) cmd_eval);
command_unbind("cd", (SIGNAL_FUNC) cmd_cd);
command_unbind("rehash", (SIGNAL_FUNC) cmd_rehash);
command_unbind("save", (SIGNAL_FUNC) cmd_save);
}
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