static int
varisset(char *name, int nulok)
{
if (*name == '!')
return backgndpidset();
else if (*name == '@' || *name == '*') {
if (*shellparam.p == NULL)
return 0;
if (nulok) {
char **av;
for (av = shellparam.p; *av; av++)
if (**av != '\0')
return 1;
return 0;
}
} else if (is_digit(*name)) {
char *ap;
int num = atoi(name);
if (num > shellparam.nparam)
return 0;
if (num == 0)
ap = arg0;
else
ap = shellparam.p[num - 1];
if (nulok && (ap == NULL || *ap == '\0'))
return 0;
}
return 1;
}
static int32_t
varisset(const_cstring_t name, int32_t nulok)
{
if (*name == '!')
return backgndpidset();
else if (*name == '@' || *name == '*')
{
if (*shellparam.p == NULL)
return 0;
if (nulok)
{
cstring_t* av;
for (av = shellparam.p; *av; av++)
if (**av != '\0')
return 1;
return 0;
}
}
else if (is_digit(*name))
{
cstring_t ap;
intptr_t num;
errno = 0;
num = (intptr_t)strtol(name, NULL, 10);
if (errno != 0 || num > shellparam.nparam)
return 0;
if (num == 0)
ap = arg0;
else
ap = shellparam.p[num - 1];
if (nulok && (ap == NULL || *ap == '\0'))
return 0;
}
return 1;
}
