diff options
Diffstat (limited to 'libbb/bb_strtonum.c')
| -rw-r--r-- | libbb/bb_strtonum.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/libbb/bb_strtonum.c b/libbb/bb_strtonum.c index 2433f1f..4a0da0a 100644 --- a/libbb/bb_strtonum.c +++ b/libbb/bb_strtonum.c @@ -18,6 +18,16 @@ * errno = ERANGE if value is out of range, missing, etc. * errno = ERANGE if value had minus sign for strtouXX (even "-0" is not ok ) * return value is all-ones in this case. + * + * Test code: + * char *endptr; + * const char *minus = "-"; + * errno = 0; + * bb_strtoi(minus, &endptr, 0); // must set ERANGE + * printf("minus:%p endptr:%p errno:%d EINVAL:%d\n", minus, endptr, errno, EINVAL); + * errno = 0; + * bb_strtoi("-0-", &endptr, 0); // must set EINVAL and point to second '-' + * printf("endptr[0]:%c errno:%d EINVAL:%d\n", endptr[0], errno, EINVAL); */ static unsigned long long ret_ERANGE(void) @@ -38,11 +48,6 @@ static unsigned long long handle_errors(unsigned long long v, char **endp, char /* good number, just suspicious terminator */ errno = EINVAL; } - /* 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(); return v; } @@ -67,7 +72,12 @@ long long FAST_FUNC bb_strtoll(const char *arg, char **endp, int base) unsigned long long v; char *endptr; - if (arg[0] != '-' && !isalnum(arg[0])) return ret_ERANGE(); + /* Check for the weird "feature": + * a "-" string is apparently a valid "number" for strto[u]l[l]! + * It returns zero and errno is 0! :( */ + char first = (arg[0] != '-' ? arg[0] : arg[1]); + if (!isalnum(first)) return ret_ERANGE(); + errno = 0; v = strtoll(arg, &endptr, base); return handle_errors(v, endp, endptr); @@ -90,7 +100,9 @@ long FAST_FUNC bb_strtol(const char *arg, char **endp, int base) long v; char *endptr; - if (arg[0] != '-' && !isalnum(arg[0])) return ret_ERANGE(); + char first = (arg[0] != '-' ? arg[0] : arg[1]); + if (!isalnum(first)) return ret_ERANGE(); + errno = 0; v = strtol(arg, &endptr, base); return handle_errors(v, endp, endptr); @@ -115,7 +127,9 @@ int FAST_FUNC bb_strtoi(const char *arg, char **endp, int base) long v; char *endptr; - if (arg[0] != '-' && !isalnum(arg[0])) return ret_ERANGE(); + char first = (arg[0] != '-' ? arg[0] : arg[1]); + if (!isalnum(first)) return ret_ERANGE(); + errno = 0; v = strtol(arg, &endptr, base); if (v > INT_MAX) return ret_ERANGE(); |