コード例 #1
0
ファイル: parser1.c プロジェクト: hgeunkang/4.4BSD-Lite2
p_start()
{
    char flag = 1;

    (void) s_gettok();
    for (;;) {
        p_statementlist(flag);
        if (token == T_EOF || p_abort())
            break;
        flag = 0;
        p_synerror();
        while (token != T_EOL && token != T_EOF) {
            if (token == T_STR)
                str_free(token_str);
            (void) s_gettok();
        }
        if (token == T_EOL)
            (void) s_gettok();
        p_clearerr();
    }
}
コード例 #2
0
ファイル: parser2.c プロジェクト: AhmadTux/DragonFlyBSD
int
p_assign(const char *name, struct value *v, int flag)
{
	(void) s_gettok();

	if (p_expr(v, flag) < 0) {
		p_synerror();
		return -1;
	}
	switch (v->v_type) {
	case V_STR:
	case V_NUM:
		if (name && flag && var_set(name, v) == 0) {
			p_memerror();
			val_free(*v);
			return -1;
		}
		break;
	}
	return 0;
}
コード例 #3
0
ファイル: parser2.c プロジェクト: AhmadTux/DragonFlyBSD
/*
 * name == 0 means we don't have a function name but
 * want to parse the arguments anyway.  flag == 0 in this case.
 */
int
p_function(const char *name, struct value *v, int flag)
{
	struct value t;
	struct lcmd_tab *c = NULL;
	struct alias *a = NULL;
	struct lcmd_arg *ap;			/* this arg */
	struct lcmd_arg *lp = NULL;		/* list arg */
	int i;
	struct value av[LCMD_NARG + 1];
	struct value *vp;

	if (name != NULL) {
		if ((c = lcmd_lookup(name)))
			name = c->lc_name;
		else if ((a = alias_lookup(name)))
			name = a->a_name;
		else {
			p_error("%s: No such command or alias.", name);
			flag = 0;
		}
	}
	for (vp = av; vp < &av[LCMD_NARG + 1]; vp++)
		vp->v_type = V_ERR;

	if (token == T_LP)
		(void) s_gettok();
	i = 0;
	for (;;) {
		ap = NULL;
		vp = NULL;
		if (token == T_COMMA)		/* null argument */
			t.v_type = V_ERR;
		else {
			if (p_expr0(&t, flag) < 0)
				break;
			if (t.v_type == V_ERR)
				flag = 0;
		}
		if (token != T_ASSIGN) {
			if (i >= LCMD_NARG ||
			    (c != NULL && (ap = lp) == NULL &&
			    (ap = c->lc_arg + i)->arg_name == 0)) {
				p_error("%s: Too many arguments.", name);
				flag = 0;
			} else
				vp = &av[i++];
		} else {
			char *tmp;
			if (p_convstr(&t) < 0)
				goto abort;
			tmp = t.v_type == V_STR ? t.v_str : 0;
			(void) s_gettok();
			if (p_expr(&t, flag) < 0) {
				if (tmp)
					str_free(tmp);
				p_synerror();
				goto abort;
			}
			if (t.v_type == V_ERR)
				flag = 0;
			if (tmp) {
				if (c == NULL) {
					/* an aliase */
					p_error("%s: Bad alias syntax.", name);
					flag = 0;
				} else {
					for (ap = c->lc_arg, vp = av;
					     ap != NULL && ap->arg_name != 0 &&
					     (*ap->arg_name == '\0' ||
					      !str_match(tmp, ap->arg_name,
							ap->arg_minlen));
					     ap++, vp++)
						;
					if (ap == NULL || ap->arg_name == 0) {
						p_error("%s: Unknown argument \"%s\".",
							name, tmp);
						flag = 0;
						ap = NULL;
						vp = NULL;
					}
				}
				str_free(tmp);
			}
		}
		if (ap != NULL) {
			if (ap->arg_flags & ARG_LIST) {
				i = vp - av + 1;
				lp = ap;
			}
			if (vp && vp->v_type != V_ERR) {
				if (*ap->arg_name)
					p_error("%s: Argument %d (%s) duplicated.",
						name, (int)(vp - av + 1),
						ap->arg_name);
				else
					p_error("%s: Argument %d duplicated.",
						name, (int)(vp - av + 1));
				flag = 0;
				vp = NULL;
			} else if (t.v_type == V_ERR) {
				/* do nothing */
			} else if (((ap->arg_flags&ARG_TYPE) == ARG_NUM &&
				    t.v_type != V_NUM) ||
				   ((ap->arg_flags&ARG_TYPE) == ARG_STR &&
				   t.v_type != V_STR)) {
				if (*ap->arg_name)
					p_error("%s: Argument %d (%s) type mismatch.",
						name, (int)(vp - av + 1),
						ap->arg_name);
				else
					p_error("%s: Argument %d type mismatch.",
						name, (int)(vp - av + 1));
				flag = 0;
				vp = NULL;
			}
		}
		if (vp != NULL)
			*vp = t;
		else
			val_free(t);
		if (token == T_COMMA)
			(void) s_gettok();
	}

	if (p_erred())
		flag = 0;
	if (token == T_RP)
		(void) s_gettok();
	else if (token != T_EOL && token != T_EOF)
		flag = 0;		/* look for legal follow set */
	v->v_type = V_ERR;
	if (flag) {
		if (c != NULL)
			(*c->lc_func)(v, av);
		else {
			if (a->a_flags & A_INUSE)
				p_error("%s: Recursive alias.", a->a_name);
			else {
				a->a_flags |= A_INUSE;
				if (dolongcmd(a->a_buf, av, i) < 0)
					p_memerror();
				a->a_flags &= ~A_INUSE;
			}
		}
	}
	if (p_abort()) {
		val_free(*v);
		v->v_type = V_ERR;
		goto abort;
	}
	for (vp = av; vp < &av[LCMD_NARG]; vp++)
		val_free(*vp);
	return 0;
abort:
	for (vp = av; vp < &av[LCMD_NARG]; vp++)
		val_free(*vp);
	return -1;
}