unsigned bb_strtou(const char *arg, char **endp, int base)
{
unsigned long v;
char *endptr;
if (!isalnum(arg[0])) return ret_ERANGE();
errno = 0;
v = strtoul(arg, &endptr, base);
if (v > UINT_MAX) return ret_ERANGE();
return handle_errors(v, endp, endptr);
}
int bb_strtoi(const char *arg, char **endp, int base)
{
long v;
char *endptr;
if (arg[0] != '-' && !isalnum(arg[0])) return ret_ERANGE();
errno = 0;
v = strtol(arg, &endptr, base);
if (v > INT_MAX) return ret_ERANGE();
if (v < INT_MIN) return ret_ERANGE();
return handle_errors(v, endp, endptr);
}
unsigned FAST_FUNC bb_strtou(const char *arg, char **endp, int base)
{
unsigned long v;
char *endptr;
if (!endp) endp = &endptr;
*endp = (char*) arg;
if (!isalnum(arg[0])) return ret_ERANGE();
errno = 0;
v = strtoul(arg, endp, base);
if (v > UINT_MAX) return ret_ERANGE();
return handle_errors(v, endp);
}
int FAST_FUNC bb_strtoi(const char *arg, char **endp, int base)
{
long v;
char *endptr;
char first;
if (!endp) endp = &endptr;
*endp = (char*) arg;
first = (arg[0] != '-' ? arg[0] : arg[1]);
if (!isalnum(first)) return ret_ERANGE();
errno = 0;
v = strtol(arg, endp, base);
if (v > INT_MAX) return ret_ERANGE();
if (v < INT_MIN) return ret_ERANGE();
return handle_errors(v, endp);
}
long long bb_strtoll(const char *arg, char **endp, int base)
{
unsigned long long v;
char *endptr;
if (arg[0] != '-' && !isalnum(arg[0])) return ret_ERANGE();
errno = 0;
v = strtoll(arg, &endptr, base);
return handle_errors(v, endp, endptr);
}
static unsigned long long handle_errors(unsigned long long v, char **endp, char *endptr)
{
if (endp) *endp = endptr;
/* Check for the weird "feature":
* a "-" string is apparently a valid "number" for strto[u]l[l]!
* It returns zero and errno is 0! :( */
if (endptr[-1] == '-')
return ret_ERANGE();
/* errno is already set to ERANGE by strtoXXX if value overflowed */
if (endptr[0]) {
/* "1234abcg" or out-of-range? */
if (isalnum(endptr[0]) || errno)
return ret_ERANGE();
/* good number, just suspicious terminator */
errno = EINVAL;
}
return v;
}
static unsigned long long handle_errors(unsigned long long v, char **endp)
{
char next_ch = **endp;
/* errno is already set to ERANGE by strtoXXX if value overflowed */
if (next_ch) {
/* "1234abcg" or out-of-range? */
if (isalnum(next_ch) || errno)
return ret_ERANGE();
/* good number, just suspicious terminator */
errno = EINVAL;
}
return v;
}
unsigned long long bb_strtoull(const char *arg, char **endp, int base)
{
unsigned long long v;
char *endptr;
/* strtoul(" -4200000000") returns 94967296, errno 0 (!) */
/* I don't think that this is right. Preventing this... */
if (!isalnum(arg[0])) return ret_ERANGE();
/* not 100% correct for lib func, but convenient for the caller */
errno = 0;
v = strtoull(arg, &endptr, base);
return handle_errors(v, endp, endptr);
}
long long FAST_FUNC bb_strtoll(const char *arg, char **endp, int base)
{
unsigned long long v;
char *endptr;
char first;
if (!endp) endp = &endptr;
*endp = (char*) arg;
/* Check for the weird "feature":
* a "-" string is apparently a valid "number" for strto[u]l[l]!
* It returns zero and errno is 0! :( */
first = (arg[0] != '-' ? arg[0] : arg[1]);
if (!isalnum(first)) return ret_ERANGE();
errno = 0;
v = strtoll(arg, endp, base);
return handle_errors(v, endp);
}
unsigned long long FAST_FUNC bb_strtoull(const char *arg, char **endp, int base)
{
unsigned long long v;
char *endptr;
if (!endp) endp = &endptr;
*endp = (char*) arg;
/* strtoul(" -4200000000") returns 94967296, errno 0 (!) */
/* I don't think that this is right. Preventing this... */
//if (!isalnum(arg[0])) return ret_ERANGE();
char first = (arg[0] != '-' ? arg[0] : arg[1]);
if (!isalnum(first)) return ret_ERANGE();
/* not 100% correct for lib func, but convenient for the caller */
errno = 0;
v = strtoull(arg, endp, base);
return handle_errors(v, endp);
}
