예제 #1
0
파일: var.c 프로젝트: Dioxylin/es-shell
static List *callsettor(char *name, List *defn) {
	Push p;
	List *settor;

	if (specialvar(name) || (settor = varlookup2("set-", name, NULL)) == NULL)
		return defn;

	Ref(List *, lp, defn);
	Ref(List *, fn, settor);
	varpush(&p, "0", mklist(mkstr(name), NULL));

	lp = listcopy(eval(append(fn, lp), NULL, 0));

	varpop(&p);
	RefEnd(fn);
	RefReturn(lp);
}
예제 #2
0
파일: eval.c 프로젝트: Dioxylin/es-shell
/* localbind -- recursively convert a Bindings list into dynamic binding */
static List *localbind(Binding *dynamic0, Binding *lexical0,
		       Tree *body0, int evalflags) {
	if (dynamic0 == NULL)
		return walk(body0, lexical0, evalflags);
	else {
		Push p;
		Ref(List *, result, NULL);
		Ref(Tree *, body, body0);
		Ref(Binding *, dynamic, dynamic0);
		Ref(Binding *, lexical, lexical0);

		varpush(&p, dynamic->name, dynamic->defn);
		result = localbind(dynamic->next, lexical, body, evalflags);
		varpop(&p);

		RefEnd3(lexical, dynamic, body);
		RefReturn(result);
	}
}
예제 #3
0
save() {

	reg char	*sp;
	reg int		outf;
	reg time_t	*tp;
	char		buf[80];
	time_t		tme;
	STAT		junk;

	tp = &tme;
	if (Fromfile && getyn(SAMEFILEPROMPT))
		strcpy(buf, Fromfile);
	else {
over:
		prompt(FILEPROMPT);
		leaveok(Board, FALSE);
		refresh();
		sp = buf;
		while ((*sp = readch()) != '\n') {
			if (*sp == killchar())
				goto over;
			else if (*sp == erasechar()) {
				if (--sp < buf)
					sp = buf;
				else {
					addch('\b');
					/*
					 * if the previous char was a control
					 * char, cover up two characters.
					 */
					if (*sp < ' ')
						addch('\b');
					clrtoeol();
				}
			}
			else
				addstr(unctrl(*sp++));
			refresh();
		}
		*sp = '\0';
		leaveok(Board, TRUE);
	}

	/*
	 * check for existing files, and confirm overwrite if needed
	 */

	if (sp == buf || (!Fromfile && stat(buf, &junk) > -1
	    && getyn(OVERWRITEFILEPROMPT) == FALSE))
		return FALSE;

	if ((outf = creat(buf, 0644)) < 0) {
		error(strerror(errno));
		return FALSE;
	}
	mvwaddstr(Score, ERR_Y, ERR_X, buf);
	wrefresh(Score);
	time(tp);			/* get current time		*/
	strcpy(buf, ctime(tp));
	for (sp = buf; *sp != '\n'; sp++)
		continue;
	*sp = '\0';
	varpush(outf, write);
	close(outf);
	wprintw(Score, " [%s]", buf);
	wclrtoeol(Score);
	wrefresh(Score);
	return TRUE;
}
예제 #4
0
파일: save.c 프로젝트: dank101/4.2BSD
save() {

	reg char	*sp;
	reg int		outf;
	reg TIME	*tp;
	char		buf[80];
	TIME		tme;
	STAT		junk;

	tp = &tme;
	if (Fromfile && getyn("Same file? "))
		strcpy(buf, Fromfile);
	else {
over:
		mvaddstr(MOVE_Y, MOVE_X, "file: ");
		clrtoeol();
		leaveok(Board, FALSE);
		refresh();
		sp = buf;
		while ((*sp = readch()) != '\n') {
			if (*sp == _tty.sg_kill)
				goto over;
			else if (*sp == _tty.sg_erase) {
				if (--sp < buf)
					sp = buf;
				else {
					addch('\b');
					/*
					 * if the previous char was a control
					 * char, cover up two characters.
					 */
					if (*sp < ' ')
						addch('\b');
					clrtoeol();
				}
			}
			else
				addstr(unctrl(*sp++));
			refresh();
		}
		*sp = '\0';
		leaveok(Board, TRUE);
	}

	/*
	 * check for existing files, and confirm overwrite if needed
	 */

	if (sp == buf || (!Fromfile && stat(buf, &junk) > -1
	    && getyn("Overwrite File? ") == FALSE))
		return FALSE;

	if ((outf = creat(buf, 0644)) < 0) {
		error(sys_errlist[errno]);
		return FALSE;
	}
	mvwaddstr(Score, ERR_Y, ERR_X, buf);
	wrefresh(Score);
	time(tp);			/* get current time		*/
	strcpy(buf, ctime(tp));
	for (sp = buf; *sp != '\n'; sp++)
		continue;
	*sp = '\0';
	varpush(outf, write);
	close(outf);
	wprintw(Score, " [%s]", buf);
	wclrtoeol(Score);
	wrefresh(Score);
	return TRUE;
}
예제 #5
0
파일: eval.c 프로젝트: Dioxylin/es-shell
/* eval -- evaluate a list, producing a list */
extern List *eval(List *list0, Binding *binding0, int flags) {
	Closure *volatile cp;
	List *fn;

	if (++evaldepth >= maxevaldepth)
		fail("es:eval", "max-eval-depth exceeded");

	Ref(List *, list, list0);
	Ref(Binding *, binding, binding0);
	Ref(char *, funcname, NULL);

restart:
	if (list == NULL) {
		RefPop3(funcname, binding, list);
		--evaldepth;
		return true;
	}
	assert(list->term != NULL);

	if ((cp = getclosure(list->term)) != NULL) {
		switch (cp->tree->kind) {
		    case nPrim:
			assert(cp->binding == NULL);
			list = prim(cp->tree->u[0].s, list->next, binding, flags);
			break;
		    case nThunk:
			list = walk(cp->tree->u[0].p, cp->binding, flags);
			break;
		    case nLambda:
			ExceptionHandler

				Push p;
				Ref(Tree *, tree, cp->tree);
				Ref(Binding *, context,
					       bindargs(tree->u[0].p,
							list->next,
							cp->binding));
				if (funcname != NULL)
					varpush(&p, "0",
						    mklist(mkterm(funcname,
								  NULL),
							   NULL));
				list = walk(tree->u[1].p, context, flags);
				if (funcname != NULL)
					varpop(&p);
				RefEnd2(context, tree);
	
			CatchException (e)

				if (termeq(e->term, "return")) {
					list = e->next;
					goto done;
				}
				throw(e);

			EndExceptionHandler
			break;
		    case nList: {
			list = glom(cp->tree, cp->binding, TRUE);
			list = append(list, list->next);
			goto restart;
		    }
		    default:
			panic("eval: bad closure node kind %d",
			      cp->tree->kind);
		    }
		goto done;
	}

	/* the logic here is duplicated in $&whatis */

	Ref(char *, name, getstr(list->term));
	fn = varlookup2("fn-", name, binding);
	if (fn != NULL) {
		funcname = name;
		list = append(fn, list->next);
		RefPop(name);
		goto restart;
	}
	if (isabsolute(name)) {
		char *error = checkexecutable(name);
		if (error != NULL)
			fail("$&whatis", "%s: %s", name, error);
		list = forkexec(name, list, flags & eval_inchild);
		RefPop(name);
		goto done;
	}
	RefEnd(name);

	fn = pathsearch(list->term);
	if (fn != NULL && fn->next == NULL
	    && (cp = getclosure(fn->term)) == NULL) {
		char *name = getstr(fn->term);
		list = forkexec(name, list, flags & eval_inchild);
		goto done;
	}

	list = append(fn, list->next);
	goto restart;

done:
	--evaldepth;
	if ((flags & eval_exitonfalse) && !istrue(list))
		exit(exitstatus(list));
	RefEnd2(funcname, binding);
	RefReturn(list);
}