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|
/*
special-vars.c : irssi
Copyright (C) 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 "signals.h"
#include "special-vars.h"
#include "settings.h"
#include "misc.h"
#include "irssi-version.h"
#include "channels.h"
#include "queries.h"
#include "window-item-def.h"
#include <sys/utsname.h>
#define ALIGN_RIGHT 0x01
#define ALIGN_CUT 0x02
static EXPANDO_FUNC char_expandos[256];
static GHashTable *expandos;
static time_t client_start_time;
static SPECIAL_HISTORY_FUNC history_func;
static char *get_argument(char **cmd, char **arglist)
{
GString *str;
char *ret;
int max, arg, argcount;
arg = 0;
max = -1;
argcount = strarray_length(arglist);
if (**cmd == '*') {
/* get all arguments */
} else if (**cmd == '~') {
/* get last argument */
arg = max = argcount-1;
} else {
if (isdigit(**cmd)) {
/* first argument */
arg = max = (**cmd)-'0';
(*cmd)++;
}
if (**cmd == '-') {
/* get more than one argument */
(*cmd)++;
if (!isdigit(**cmd))
max = -1; /* get all the rest */
else {
max = (**cmd)-'0';
(*cmd)++;
}
}
(*cmd)--;
}
str = g_string_new(NULL);
while (arg < argcount && (arg <= max || max == -1)) {
g_string_append(str, arglist[arg]);
g_string_append_c(str, ' ');
arg++;
}
if (str->len > 0) g_string_truncate(str, str->len-1);
ret = str->str;
g_string_free(str, FALSE);
return ret;
}
static char *get_internal_setting(const char *key, int type, int *free_ret)
{
switch (type) {
case SETTING_TYPE_BOOLEAN:
return settings_get_bool(key) ? "yes" : "no";
case SETTING_TYPE_INT:
*free_ret = TRUE;
return g_strdup_printf("%d", settings_get_int(key));
case SETTING_TYPE_STRING:
return (char *) settings_get_str(key);
}
return NULL;
}
static char *get_long_variable_value(const char *key, SERVER_REC *server,
void *item, int *free_ret)
{
EXPANDO_FUNC func;
char *ret;
int type;
*free_ret = FALSE;
/* expando? */
func = (EXPANDO_FUNC) g_hash_table_lookup(expandos, key);
if (func != NULL)
return func(server, item, free_ret);
/* internal setting? */
type = settings_get_type(key);
if (type != -1)
return get_internal_setting(key, type, free_ret);
/* environment variable? */
ret = g_getenv(key);
if (ret != NULL)
return ret;
return NULL;
}
static char *get_long_variable(char **cmd, SERVER_REC *server,
void *item, int *free_ret)
{
char *start, *var, *ret;
/* get variable name */
start = *cmd;
while (isalnum((*cmd)[1])) (*cmd)++;
var = g_strndup(start, (int) (*cmd-start)+1);
ret = get_long_variable_value(var, server, item, free_ret);
g_free(var);
return ret;
}
/* return the value of the variable found from `cmd' */
static char *get_variable(char **cmd, SERVER_REC *server, void *item,
char **arglist, int *free_ret, int *arg_used)
{
if (isdigit(**cmd) || **cmd == '*' || **cmd == '-' || **cmd == '~') {
/* argument */
*free_ret = TRUE;
if (arg_used != NULL) *arg_used = TRUE;
return get_argument(cmd, arglist);
}
if (isalpha(**cmd) && isalnum((*cmd)[1])) {
/* long variable name.. */
return get_long_variable(cmd, server, item, free_ret);
}
/* single character variable. */
*free_ret = FALSE;
return char_expandos[(int) **cmd] == NULL ? NULL :
char_expandos[(int) **cmd](server, item, free_ret);
}
static char *get_history(char **cmd, void *item, int *free_ret)
{
char *start, *text, *ret;
/* get variable name */
start = ++(*cmd);
while (**cmd != '\0' && **cmd != '!') (*cmd)++;
if (history_func == NULL)
ret = NULL;
else {
text = g_strndup(start, (int) (*cmd-start)+1);
ret = history_func(text, item, free_ret);
g_free(text);
}
if (**cmd == '\0') (*cmd)--;
return ret;
}
static char *get_special_value(char **cmd, SERVER_REC *server, void *item,
char **arglist, int *free_ret, int *arg_used)
{
char command, *value, *p;
int len;
if (**cmd == '!') {
/* find text from command history */
return get_history(cmd, item, free_ret);
}
command = 0;
if (**cmd == '#' || **cmd == '@') {
command = **cmd;
if ((*cmd)[1] != '\0')
(*cmd)++;
else {
/* default to $* */
char *temp_cmd = "*";
*free_ret = TRUE;
return get_argument(&temp_cmd, arglist);
}
}
value = get_variable(cmd, server, item, arglist, free_ret, arg_used);
if (command == '#') {
/* number of words */
if (value == NULL || *value == '\0') {
if (value != NULL && *free_ret) {
g_free(value);
*free_ret = FALSE;
}
return "0";
}
len = 1;
for (p = value; *p != '\0'; p++) {
if (*p == ' ' && (p[1] != ' ' && p[1] != '\0'))
len++;
}
if (*free_ret) g_free(value);
*free_ret = TRUE;
return g_strdup_printf("%d", len);
}
if (command == '@') {
/* number of characters */
if (value == NULL) return "0";
len = strlen(value);
if (*free_ret) g_free(value);
*free_ret = TRUE;
return g_strdup_printf("%d", len);
}
return value;
}
/* get alignment arguments (inside the []) */
static int get_alignment_args(char **data, int *align, int *flags, char *pad)
{
char *str;
*align = 0;
*flags = ALIGN_CUT;
*pad = ' ';
/* '!' = don't cut, '-' = right padding */
str = *data;
while (*str != '\0' && *str != ']' && !isdigit(*str)) {
if (*str == '!')
*flags &= ~ALIGN_CUT;
else if (*str == '-')
*flags |= ALIGN_RIGHT;
str++;
}
if (!isdigit(*str))
return FALSE; /* expecting number */
/* get the alignment size */
while (isdigit(*str)) {
*align = (*align) * 10 + (*str-'0');
str++;
}
/* get the pad character */
while (*str != '\0' && *str != ']') {
*pad = *str;
str++;
}
if (*str++ != ']') return FALSE;
*data = str;
return TRUE;
}
/* return the aligned text */
static char *get_alignment(const char *text, int align, int flags, char pad)
{
GString *str;
char *ret;
g_return_val_if_fail(text != NULL, NULL);
str = g_string_new(text);
/* cut */
if ((flags & ALIGN_CUT) && align > 0 && str->len > align)
g_string_truncate(str, align);
/* add pad characters */
while (str->len < align) {
if (flags & ALIGN_RIGHT)
g_string_prepend_c(str, pad);
else
g_string_append_c(str, pad);
}
ret = str->str;
g_string_free(str, FALSE);
return ret;
}
/* Parse and expand text after '$' character. return value has to be
g_free()'d if `free_ret' is TRUE. */
char *parse_special(char **cmd, SERVER_REC *server, void *item,
char **arglist, int *free_ret, int *arg_used)
{
static char **nested_orig_cmd = NULL; /* FIXME: KLUDGE! */
char command, *value;
char align_pad;
int align, align_flags;
char *nest_value;
int brackets, nest_free;
*free_ret = FALSE;
command = **cmd; (*cmd)++;
switch (command) {
case '[':
/* alignment */
if (!get_alignment_args(cmd, &align, &align_flags,
&align_pad) || **cmd == '\0') {
(*cmd)--;
return NULL;
}
break;
default:
command = 0;
(*cmd)--;
}
nest_free = FALSE; nest_value = NULL;
if (**cmd == '(') {
/* subvariable */
int toplevel = nested_orig_cmd == NULL;
if (toplevel) nested_orig_cmd = cmd;
(*cmd)++;
if (**cmd != '$') {
/* ... */
nest_value = *cmd;
} else {
(*cmd)++;
nest_value = parse_special(cmd, server, item, arglist,
&nest_free, arg_used);
}
while ((*nested_orig_cmd)[1] != '\0') {
(*nested_orig_cmd)++;
if (**nested_orig_cmd == ')')
break;
}
cmd = &nest_value;
if (toplevel) nested_orig_cmd = NULL;
}
if (**cmd != '{')
brackets = FALSE;
else {
/* special value is inside {...} (foo${test}bar -> fooXXXbar) */
(*cmd)++;
brackets = TRUE;
}
value = get_special_value(cmd, server, item, arglist,
free_ret, arg_used);
if (**cmd == '\0')
g_error("parse_special() : buffer overflow!");
if (brackets) {
while (**cmd != '}' && (*cmd)[1] != '\0')
(*cmd)++;
}
if (nest_free) g_free(nest_value);
if (command == '[') {
/* alignment */
char *p;
if (value == NULL) return "";
p = get_alignment(value, align, align_flags, align_pad);
if (*free_ret) g_free(value);
*free_ret = TRUE;
return p;
}
return value;
}
/* parse the whole string. $ and \ chars are replaced */
char *parse_special_string(const char *cmd, SERVER_REC *server, void *item,
const char *data, int *arg_used)
{
char code, **arglist, *ret;
GString *str;
int need_free;
g_return_val_if_fail(cmd != NULL, NULL);
g_return_val_if_fail(data != NULL, NULL);
/* create the argument list */
arglist = g_strsplit(data, " ", -1);
if (arg_used != NULL) *arg_used = FALSE;
code = 0;
str = g_string_new(NULL);
while (*cmd != '\0') {
if (code == '\\'){
switch (*cmd) {
case 't':
g_string_append_c(str, '\t');
break;
case 'n':
g_string_append_c(str, '\n');
break;
default:
g_string_append_c(str, *cmd);
}
code = 0;
} else if (code == '$') {
char *ret;
ret = parse_special((char **) &cmd, server, item,
arglist, &need_free, arg_used);
if (ret != NULL) {
g_string_append(str, ret);
if (need_free) g_free(ret);
}
code = 0;
} else {
if (*cmd == '\\' || *cmd == '$')
code = *cmd;
else
g_string_append_c(str, *cmd);
}
cmd++;
}
g_strfreev(arglist);
ret = str->str;
g_string_free(str, FALSE);
return ret;
}
#define is_split_char(str, start) \
((str)[0] == ';' && ((start) == (str) || \
((str)[-1] != '\\' && (str)[-1] != '$')))
/* execute the commands in string - commands can be split with ';' */
void eval_special_string(const char *cmd, const char *data,
SERVER_REC *server, void *item)
{
const char *cmdchars;
char *orig, *str, *start, *ret;
int arg_used;
cmdchars = settings_get_str("cmdchars");
orig = start = str = g_strdup(cmd);
do {
if (is_split_char(str, start))
*str++ = '\0';
else if (*str != '\0') {
str++;
continue;
}
ret = parse_special_string(start, server, item,
data, &arg_used);
if (strchr(cmdchars, *ret) == NULL) {
/* no command char - let's put it there.. */
char *old = ret;
ret = g_strdup_printf("%c%s", *cmdchars, old);
g_free(old);
}
if (!arg_used && *data != '\0') {
/* append the string with all the arguments */
char *old = ret;
ret = g_strconcat(old, " ", data, NULL);
g_free(old);
}
signal_emit("send command", 3, ret, server, item);
g_free(ret);
start = str;
} while (*start != '\0');
g_free(orig);
}
/* Create expando - overrides any existing ones. */
void expando_create(const char *key, EXPANDO_FUNC func)
{
gpointer origkey, origvalue;
g_return_if_fail(key != NULL || *key == '\0');
g_return_if_fail(func != NULL);
if (key[1] == '\0') {
/* single character expando */
char_expandos[(int) *key] = func;
return;
}
if (g_hash_table_lookup_extended(expandos, key, &origkey,
&origvalue)) {
g_free(origkey);
g_hash_table_remove(expandos, key);
}
g_hash_table_insert(expandos, g_strdup(key), (void *) func);
}
/* Destroy expando */
void expando_destroy(const char *key, EXPANDO_FUNC func)
{
gpointer origkey, origvalue;
g_return_if_fail(key != NULL || *key == '\0');
g_return_if_fail(func != NULL);
if (key[1] == '\0') {
/* single character expando */
if (char_expandos[(int) *key] == func)
char_expandos[(int) *key] = NULL;
return;
}
if (g_hash_table_lookup_extended(expandos, key, &origkey,
&origvalue)) {
g_free(origkey);
g_hash_table_remove(expandos, key);
}
}
void special_history_func_set(SPECIAL_HISTORY_FUNC func)
{
history_func = func;
}
/* text of your AWAY message, if any */
static char *expando_awaymsg(SERVER_REC *server, void *item, int *free_ret)
{
return server == NULL ? "" : server->away_reason;
}
/* current channel */
static char *expando_channel(SERVER_REC *server, void *item, int *free_ret)
{
return !IS_CHANNEL(item) ? NULL : CHANNEL(item)->name;
}
/* time client was started, $time() format */
static char *expando_clientstarted(SERVER_REC *server, void *item, int *free_ret)
{
*free_ret = TRUE;
return g_strdup_printf("%ld", (long) client_start_time);
}
/* client version text string */
static char *expando_version(SERVER_REC *server, void *item, int *free_ret)
{
return IRSSI_VERSION;
}
/* current value of CMDCHARS */
static char *expando_cmdchars(SERVER_REC *server, void *item, int *free_ret)
{
return (char *) settings_get_str("cmdchars");
}
/* modes of current channel, if any */
static char *expando_chanmode(SERVER_REC *server, void *item, int *free_ret)
{
return !IS_CHANNEL(item) ? NULL : CHANNEL(item)->mode;
}
/* current nickname */
static char *expando_nick(SERVER_REC *server, void *item, int *free_ret)
{
return server == NULL ? "" : server->nick;
}
/* value of STATUS_OPER if you are an irc operator */
static char *expando_statusoper(SERVER_REC *server, void *item, int *free_ret)
{
return server == NULL || !server->server_operator ? "" :
(char *) settings_get_str("STATUS_OPER");
}
/* if you are a channel operator in $C, expands to a '@' */
static char *expando_chanop(SERVER_REC *server, void *item, int *free_ret)
{
return IS_CHANNEL(item) && CHANNEL(item)->chanop ? "@" : "";
}
/* nickname of whomever you are QUERYing */
static char *expando_query(SERVER_REC *server, void *item, int *free_ret)
{
return !IS_QUERY(item) ? "" : QUERY(item)->name;
}
/* version of current server */
static char *expando_serverversion(SERVER_REC *server, void *item, int *free_ret)
{
return server == NULL ? "" : server->version;
}
/* target of current input (channel or QUERY nickname) */
static char *expando_target(SERVER_REC *server, void *item, int *free_ret)
{
return ((WI_ITEM_REC *) item)->name;
}
/* client release date (numeric version string) */
static char *expando_releasedate(SERVER_REC *server, void *item, int *free_ret)
{
return IRSSI_VERSION_DATE;
}
/* current working directory */
static char *expando_workdir(SERVER_REC *server, void *item, int *free_ret)
{
*free_ret = TRUE;
return g_get_current_dir();
}
/* value of REALNAME */
static char *expando_realname(SERVER_REC *server, void *item, int *free_ret)
{
return server == NULL ? "" : server->connrec->realname;
}
/* time of day (hh:mm) */
static char *expando_time(SERVER_REC *server, void *item, int *free_ret)
{
time_t now = time(NULL);
struct tm *tm;
tm = localtime(&now);
*free_ret = TRUE;
return g_strdup_printf("%02d:%02d", tm->tm_hour, tm->tm_min);
}
/* a literal '$' */
static char *expando_dollar(SERVER_REC *server, void *item, int *free_ret)
{
return "$";
}
/* system name */
static char *expando_sysname(SERVER_REC *server, void *item, int *free_ret)
{
struct utsname un;
if (uname(&un) == -1)
return NULL;
*free_ret = TRUE;
return g_strdup(un.sysname);
}
/* system release */
static char *expando_sysrelease(SERVER_REC *server, void *item, int *free_ret)
{
struct utsname un;
if (uname(&un) == -1)
return NULL;
*free_ret = TRUE;
return g_strdup(un.release);
}
/* Server tag */
static char *expando_servertag(SERVER_REC *server, void *item, int *free_ret)
{
return server == NULL ? "" : server->tag;
}
/* Server chatnet */
static char *expando_chatnet(SERVER_REC *server, void *item, int *free_ret)
{
return server == NULL ? "" : server->connrec->chatnet;
}
void special_vars_init(void)
{
settings_add_str("misc", "STATUS_OPER", "*");
client_start_time = time(NULL);
memset(char_expandos, 0, sizeof(char_expandos));
expandos = g_hash_table_new((GHashFunc) g_str_hash,
(GCompareFunc) g_str_equal);
history_func = NULL;
char_expandos['A'] = expando_awaymsg;
char_expandos['C'] = expando_channel;
char_expandos['F'] = expando_clientstarted;
char_expandos['J'] = expando_version;
char_expandos['K'] = expando_cmdchars;
char_expandos['M'] = expando_chanmode;
char_expandos['N'] = expando_nick;
char_expandos['O'] = expando_statusoper;
char_expandos['P'] = expando_chanop;
char_expandos['Q'] = expando_query;
char_expandos['R'] = expando_serverversion;
char_expandos['T'] = expando_target;
char_expandos['V'] = expando_releasedate;
char_expandos['W'] = expando_workdir;
char_expandos['Y'] = expando_realname;
char_expandos['Z'] = expando_time;
char_expandos['$'] = expando_dollar;
expando_create("sysname", expando_sysname);
expando_create("sysrelease", expando_sysrelease);
expando_create("tag", expando_servertag);
expando_create("chatnet", expando_chatnet);
}
void special_vars_deinit(void)
{
expando_destroy("sysname", expando_sysname);
expando_destroy("sysrelease", expando_sysrelease);
expando_destroy("tag", expando_servertag);
expando_destroy("chatnet", expando_chatnet);
g_hash_table_destroy(expandos);
}
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