return simple_strtoull(cp,endp,base);
}
+
+/**
+ * strict_strtoul - convert a string to an unsigned long strictly
+ * @cp: The string to be converted
+ * @base: The number base to use
+ * @res: The converted result value
+ *
+ * strict_strtoul converts a string to an unsigned long only if the
+ * string is really an unsigned long string, any string containing
+ * any invalid char at the tail will be rejected and -EINVAL is returned,
+ * only a newline char at the tail is acceptible because people generally
+ * change a module parameter in the following way:
+ *
+ * echo 1024 > /sys/module/e1000/parameters/copybreak
+ *
+ * echo will append a newline to the tail.
+ *
+ * It returns 0 if conversion is successful and *res is set to the converted
+ * value, otherwise it returns -EINVAL and *res is set to 0.
+ *
+ * simple_strtoul just ignores the successive invalid characters and
+ * return the converted value of prefix part of the string.
+ */
+int strict_strtoul(const char *cp, unsigned int base, unsigned long *res);
+
+/**
+ * strict_strtol - convert a string to a long strictly
+ * @cp: The string to be converted
+ * @base: The number base to use
+ * @res: The converted result value
+ *
+ * strict_strtol is similiar to strict_strtoul, but it allows the first
+ * character of a string is '-'.
+ *
+ * It returns 0 if conversion is successful and *res is set to the converted
+ * value, otherwise it returns -EINVAL and *res is set to 0.
+ */
+int strict_strtol(const char *cp, unsigned int base, long *res);
+
+/**
+ * strict_strtoull - convert a string to an unsigned long long strictly
+ * @cp: The string to be converted
+ * @base: The number base to use
+ * @res: The converted result value
+ *
+ * strict_strtoull converts a string to an unsigned long long only if the
+ * string is really an unsigned long long string, any string containing
+ * any invalid char at the tail will be rejected and -EINVAL is returned,
+ * only a newline char at the tail is acceptible because people generally
+ * change a module parameter in the following way:
+ *
+ * echo 1024 > /sys/module/e1000/parameters/copybreak
+ *
+ * echo will append a newline to the tail of the string.
+ *
+ * It returns 0 if conversion is successful and *res is set to the converted
+ * value, otherwise it returns -EINVAL and *res is set to 0.
+ *
+ * simple_strtoull just ignores the successive invalid characters and
+ * return the converted value of prefix part of the string.
+ */
+int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res);
+
+/**
+ * strict_strtoll - convert a string to a long long strictly
+ * @cp: The string to be converted
+ * @base: The number base to use
+ * @res: The converted result value
+ *
+ * strict_strtoll is similiar to strict_strtoull, but it allows the first
+ * character of a string is '-'.
+ *
+ * It returns 0 if conversion is successful and *res is set to the converted
+ * value, otherwise it returns -EINVAL and *res is set to 0.
+ */
+int strict_strtoll(const char *cp, unsigned int base, long long *res);
+
+#define define_strict_strtoux(type, valtype) \
+int strict_strtou##type(const char *cp, unsigned int base, valtype *res)\
+{ \
+ char *tail; \
+ valtype val; \
+ size_t len; \
+ \
+ *res = 0; \
+ len = strlen(cp); \
+ if (len == 0) \
+ return -EINVAL; \
+ \
+ val = simple_strtoul(cp, &tail, base); \
+ if ((*tail == '\0') || \
+ ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {\
+ *res = val; \
+ return 0; \
+ } \
+ \
+ return -EINVAL; \
+} \
+
+#define define_strict_strtox(type, valtype) \
+int strict_strto##type(const char *cp, unsigned int base, valtype *res) \
+{ \
+ int ret; \
+ if (*cp == '-') { \
+ ret = strict_strtou##type(cp+1, base, res); \
+ if (ret != 0) \
+ *res = -(*res); \
+ } else \
+ ret = strict_strtou##type(cp, base, res); \
+ \
+ return ret; \
+} \
+
+define_strict_strtoux(l, unsigned long)
+define_strict_strtox(l, long)
+define_strict_strtoux(ll, unsigned long long)
+define_strict_strtox(ll, long long)
+
+EXPORT_SYMBOL(strict_strtoul);
+EXPORT_SYMBOL(strict_strtol);
+EXPORT_SYMBOL(strict_strtoll);
+EXPORT_SYMBOL(strict_strtoull);
+
static int skip_atoi(const char **s)
{
int i=0;
git.openpandora.org / pandora-kernel.git / blobdiff