<tt>long atol(const char *str);</tt>

<tt>long atol(const char *nptr);</tt>

The call atol(str) shall be equivalent to:

<tt>strtol(str, (char **)NULL, 10)</tt>

Except as noted below, the call atol(nptr) shall be equivalent to:

<tt>strtol(nptr, (char **)NULL, 10)</tt>

The call to atoll(nptr) shall be equivalent to:

Except as noted below, the call to atoll(nptr) shall be equivalent to:

except that the handling of errors may differ.

The handling of errors may differ.

The atol( ) function is subsumed by strtol() but is retained because it is used extensively in existing code. If the number is not known to be in range, strtol() should be used because atol() is not required to perform any error checking.

If the number is not known to be in range, strtol() or strtoll() should be used because atol() and atoll() are not required to perform any error checking.

<tt>long strtol(const char *restrict str, char **restrict endptr, int base);
    long long strtoll(const char *restrict str, char **restrict endptr,
    int base)</tt>

<tt>long strtol(const char *restrict nptr, char **restrict endptr, int base);
    long long strtoll(const char *restrict nptr, char **restrict endptr,
    int base)</tt>

These functions shall convert the initial portion of the string pointed to by str

These functions shall convert the initial portion of the string pointed to by nptr

the value of str shall be stored

the value of nptr shall be stored