*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
/* On exit: errno = 0 only if there was non-empty, '\0' terminated value
- * errno = EINVAL if value was not '\0' terminated, but othervise ok
+ * errno = EINVAL if value was not '\0' terminated, but otherwise ok
* Return value is still valid, caller should just check whether end[0]
* is a valid terminating char for particular case. OTOH, if caller
* requires '\0' terminated input, [s]he can just check errno == 0.
* errno = ERANGE if value had alphanumeric terminating char ("1234abcg").
* 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)
return ULLONG_MAX;
}
-static unsigned long long handle_errors(unsigned long long v, char **endp, char *endptr)
+static unsigned long long handle_errors(unsigned long long v, char **endp)
{
- 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();
+ char next_ch = **endp;
/* errno is already set to ERANGE by strtoXXX if value overflowed */
- if (endptr[0]) {
+ if (next_ch) {
/* "1234abcg" or out-of-range? */
- if (isalnum(endptr[0]) || errno)
+ if (isalnum(next_ch) || errno)
return ret_ERANGE();
/* good number, just suspicious terminator */
errno = EINVAL;
}
-unsigned long long bb_strtoull(const char *arg, char **endp, int base)
+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();
/* not 100% correct for lib func, but convenient for the caller */
errno = 0;
- return handle_errors(strtoull(arg, &endptr, base), endp, endptr);
+ v = strtoull(arg, endp, base);
+ return handle_errors(v, endp);
}
-long long bb_strtoll(const char *arg, char **endp, int base)
+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();
- if (arg[0] != '-' && !isalnum(arg[0])) return ret_ERANGE();
errno = 0;
- return handle_errors(strtoll(arg, &endptr, base), endp, endptr);
+ v = strtoll(arg, endp, base);
+ return handle_errors(v, endp);
}
#if ULONG_MAX != ULLONG_MAX
-unsigned long bb_strtoul(const char *arg, char **endp, int base)
+unsigned long FAST_FUNC bb_strtoul(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;
- return handle_errors(strtoul(arg, &endptr, base), endp, endptr);
+ v = strtoul(arg, endp, base);
+ return handle_errors(v, endp);
}
-long bb_strtol(const char *arg, char **endp, int base)
+long FAST_FUNC bb_strtol(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();
- if (arg[0] != '-' && !isalnum(arg[0])) return ret_ERANGE();
errno = 0;
- return handle_errors(strtol(arg, &endptr, base), endp, endptr);
+ v = strtol(arg, endp, base);
+ return handle_errors(v, endp);
}
#endif
#if UINT_MAX != ULONG_MAX
-unsigned bb_strtou(const char *arg, char **endp, int base)
+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, &endptr, base);
+ v = strtoul(arg, endp, base);
if (v > UINT_MAX) return ret_ERANGE();
- return handle_errors(v, endp, endptr);
+ return handle_errors(v, endp);
}
-int bb_strtoi(const char *arg, char **endp, int base)
+int FAST_FUNC bb_strtoi(const char *arg, char **endp, int base)
{
long v;
char *endptr;
+ char first;
- 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);
-}
-#endif
+ if (!endp) endp = &endptr;
+ *endp = (char*) arg;
-/* Floating point */
-
-#if 0
-
-#include <math.h> /* just for HUGE_VAL */
-#define NOT_DIGIT(a) (((unsigned char)(a-'0')) > 9)
-double bb_strtod(const char *arg, char **endp)
-{
- double v;
- char *endptr;
+ first = (arg[0] != '-' ? arg[0] : arg[1]);
+ if (!isalnum(first)) return ret_ERANGE();
- if (arg[0] != '-' && NOT_DIGIT(arg[0])) goto err;
errno = 0;
- v = strtod(arg, &endptr);
- if (endp) *endp = endptr;
- if (endptr[0]) {
- /* "1234abcg" or out-of-range? */
- if (isalnum(endptr[0]) || errno) {
- err:
- errno = ERANGE;
- return HUGE_VAL;
- }
- /* good number, just suspicious terminator */
- errno = EINVAL;
- }
- return v;
+ v = strtol(arg, endp, base);
+ if (v > INT_MAX) return ret_ERANGE();
+ if (v < INT_MIN) return ret_ERANGE();
+ return handle_errors(v, endp);
}
-
#endif
projects / platform / upstream / busybox.git / blobdiff