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/* $EPIC: tcl.c,v 1.13 2008/11/28 16:28:03 jnelson Exp $ */
/*
* tcl.c -- The tcl interfacing routines.
*
* Copyright 2001, 2006 EPIC Software Labs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notices, the above paragraph (the one permitting redistribution),
* this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the author(s) may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "irc.h"
#include "ircaux.h"
#include "array.h"
#include "alias.h"
#include "commands.h"
#include "functions.h"
#include "output.h"
#include "ifcmd.h"
#include "extlang.h"
#include <tcl.h>
#ifdef TK
#include <tk.h>
#endif
Tcl_Interp *my_tcl;
int istclrunning = 0;
/*
* A new TCL command, [echo], which displays back on the epic window.
*/
static int Tcl_echoCmd (ClientData clientData, Tcl_Interp *interp, int objc, const char **objv)
{
int i;
size_t clue = 0;
char *msg = NULL;
for (i = 1; i < objc; i++)
malloc_strcat_wordlist_c(&msg, space, objv[i], &clue);
say("%s", msg);
new_free(&msg);
return TCL_OK;
}
/*
* A new TCL command [epic] with several subcmds:
* [epic cmd ...] Runs ... as a block of code w/o $ expansion.
* [epic eval ...] Runs ... as block of code, with $ expansion.
* $* will be the empty string when expanded.
* [epic expr ...] Evals ... as an expression, returns result.
* [epic call ...] Call ... where ... is "$func(args)"
* Returning the result. $* is the empty string.
*/
static int Tcl_epicCmd (ClientData clientData, Tcl_Interp *interp, int objc, const char **objv)
{
int i;
char *retval = NULL;
char *arg = NULL;
if (objc < 2) {
Tcl_WrongNumArgs(interp, 0, NULL, "{cmd|eval|expr|call} ?epic-expression? ...");
return TCL_ERROR;
} else if (!strcmp(objv[1], "cmd")) {
for (i = 2; i < objc; i++)
runcmds("$*", objv[i]);
} else if (!strcmp(objv[1], "eval")) {
for (i = 2; i < objc; i++)
runcmds(objv[i], "");
} else if (!strcmp(objv[1], "expr")) {
for (i = 2; i < objc; i++) {
retval = (char*)parse_inline((arg = malloc_strdup(objv[i])), "");
Tcl_AppendElement(interp, retval);
new_free(&retval);
new_free(&arg);
}
} else if (!strcmp(objv[1], "call")) {
for (i = 2; i < objc; i++) {
retval = (char*)call_function((arg = malloc_strdup(objv[i])), "");
Tcl_AppendElement(interp, retval);
new_free(&retval);
new_free(&arg);
}
} else {
Tcl_WrongNumArgs(interp, 0, NULL, "{cmd|eval|expr|call} ?epic-expression? ...");
return TCL_ERROR;
}
return TCL_OK;
}
/* A new TCL command [tkon] which turns on tk (natch?) */
#ifdef TK
static int Tcl_tkonCmd (ClientData clientData, Tcl_Interp *interp, int objc, char **objv)
{
Tk_Init(interp);
return TCL_OK;
}
#endif
/* Called by the epic hooks to activate tcl on-demand. */
void tclstartstop (int startnotstop)
{
if (startnotstop && !istclrunning)
{
++istclrunning;
my_tcl = Tcl_CreateInterp();
Tcl_Init(my_tcl);
Tcl_CreateCommand(my_tcl, "echo", Tcl_echoCmd,
(ClientData)NULL, (void (*)())NULL);
Tcl_CreateCommand(my_tcl, "epic", Tcl_epicCmd,
(ClientData)NULL, (void (*)())NULL);
#ifdef TK
Tcl_CreateCommand(my_tcl, "tkon", Tcl_tkonCmd,
(ClientData)NULL, (void (*)())NULL);
#endif
}
else if (!startnotstop && istclrunning)
{
Tcl_DeleteInterp(my_tcl);
istclrunning=0;
}
}
/*
* Used by the $tcl(...) function: evalulate ... as a TCL statement, and
* return the result of the statement.
*/
char * tcleval (char* input)
{
char *retval=NULL;
if (input && *input)
{
tclstartstop(1);
Tcl_Eval(my_tcl, input);
retval = malloc_strdup(Tcl_GetStringResult(my_tcl));
}
RETURN_MSTR(retval);
}
/*
* The /TCL function: Evalulate the args as a TCL statement and ignore the
* return value of the statement.
*/
BUILT_IN_COMMAND(tclcmd)
{
char *body, *x;
if (*args == '{')
{
if (!(body = next_expr(&args, '{')))
{
my_error("TCL: unbalanced {");
return;
}
}
else
body = args;
x = tcleval(body);
new_free(&x);
}
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