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();
}
}
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;
}
/*
* 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;
}