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linux/lib/test-kstrtox.c
Alexey Dobriyan 33ee3b2e2e kstrto*: converting strings to integers done (hopefully) right 
1. simple_strto*() do not contain overflow checks and crufty,
   libc way to indicate failure.
2. strict_strto*() also do not have overflow checks but the name and
   comments pretend they do.
3. Both families have only "long long" and "long" variants,
   but users want strtou8()
4. Both "simple" and "strict" prefixes are wrong:
   Simple doesn't exactly say what's so simple, strict should not exist
   because conversion should be strict by default.

The solution is to use "k" prefix and add convertors for more types.
Enter
	kstrtoull()
	kstrtoll()
	kstrtoul()
	kstrtol()
	kstrtouint()
	kstrtoint()

	kstrtou64()
	kstrtos64()
	kstrtou32()
	kstrtos32()
	kstrtou16()
	kstrtos16()
	kstrtou8()
	kstrtos8()

Include runtime testsuite (somewhat incomplete) as well.

strict_strto*() become deprecated, stubbed to kstrto*() and
eventually will be removed altogether.

Use kstrto*() in code today!

Note: on some archs _kstrtoul() and _kstrtol() are left in tree, even if
      they'll be unused at runtime. This is temporarily solution,
      because I don't want to hardcode list of archs where these
      functions aren't needed. Current solution with sizeof() and
      __alignof__ at least always works.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-22 17:44:14 -07:00

740 lines
17 KiB
C
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#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#define for_each_test(i, test) \
for (i = 0; i < sizeof(test) / sizeof(test[0]); i++)
struct test_fail {
const char *str;
unsigned int base;
};
#define DEFINE_TEST_FAIL(test) \
const struct test_fail test[] __initdata
#define DECLARE_TEST_OK(type, test_type) \
test_type { \
const char *str; \
unsigned int base; \
type expected_res; \
}
#define DEFINE_TEST_OK(type, test) \
const type test[] __initdata
#define TEST_FAIL(fn, type, fmt, test) \
{ \
unsigned int i; \
\
for_each_test(i, test) { \
const struct test_fail *t = &test[i]; \
type tmp; \
int rv; \
\
tmp = 0; \
rv = fn(t->str, t->base, &tmp); \
if (rv >= 0) { \
WARN(1, "str '%s', base %u, expected -E, got %d/" fmt "\n", \
t->str, t->base, rv, tmp); \
continue; \
} \
} \
}
#define TEST_OK(fn, type, fmt, test) \
{ \
unsigned int i; \
\
for_each_test(i, test) { \
const typeof(test[0]) *t = &test[i]; \
type res; \
int rv; \
\
rv = fn(t->str, t->base, &res); \
if (rv != 0) { \
WARN(1, "str '%s', base %u, expected 0/" fmt ", got %d\n", \
t->str, t->base, t->expected_res, rv); \
continue; \
} \
if (res != t->expected_res) { \
WARN(1, "str '%s', base %u, expected " fmt ", got " fmt "\n", \
t->str, t->base, t->expected_res, res); \
continue; \
} \
} \
}
static void __init test_kstrtoull_ok(void)
{
DECLARE_TEST_OK(unsigned long long, struct test_ull);
static DEFINE_TEST_OK(struct test_ull, test_ull_ok) = {
{"0", 10, 0ULL},
{"1", 10, 1ULL},
{"127", 10, 127ULL},
{"128", 10, 128ULL},
{"129", 10, 129ULL},
{"255", 10, 255ULL},
{"256", 10, 256ULL},
{"257", 10, 257ULL},
{"32767", 10, 32767ULL},
{"32768", 10, 32768ULL},
{"32769", 10, 32769ULL},
{"65535", 10, 65535ULL},
{"65536", 10, 65536ULL},
{"65537", 10, 65537ULL},
{"2147483647", 10, 2147483647ULL},
{"2147483648", 10, 2147483648ULL},
{"2147483649", 10, 2147483649ULL},
{"4294967295", 10, 4294967295ULL},
{"4294967296", 10, 4294967296ULL},
{"4294967297", 10, 4294967297ULL},
{"9223372036854775807", 10, 9223372036854775807ULL},
{"9223372036854775808", 10, 9223372036854775808ULL},
{"9223372036854775809", 10, 9223372036854775809ULL},
{"18446744073709551614", 10, 18446744073709551614ULL},
{"18446744073709551615", 10, 18446744073709551615ULL},
{"00", 8, 00ULL},
{"01", 8, 01ULL},
{"0177", 8, 0177ULL},
{"0200", 8, 0200ULL},
{"0201", 8, 0201ULL},
{"0377", 8, 0377ULL},
{"0400", 8, 0400ULL},
{"0401", 8, 0401ULL},
{"077777", 8, 077777ULL},
{"0100000", 8, 0100000ULL},
{"0100001", 8, 0100001ULL},
{"0177777", 8, 0177777ULL},
{"0200000", 8, 0200000ULL},
{"0200001", 8, 0200001ULL},
{"017777777777", 8, 017777777777ULL},
{"020000000000", 8, 020000000000ULL},
{"020000000001", 8, 020000000001ULL},
{"037777777777", 8, 037777777777ULL},
{"040000000000", 8, 040000000000ULL},
{"040000000001", 8, 040000000001ULL},
{"0777777777777777777777", 8, 0777777777777777777777ULL},
{"01000000000000000000000", 8, 01000000000000000000000ULL},
{"01000000000000000000001", 8, 01000000000000000000001ULL},
{"01777777777777777777776", 8, 01777777777777777777776ULL},
{"01777777777777777777777", 8, 01777777777777777777777ULL},
{"0x0", 16, 0x0ULL},
{"0x1", 16, 0x1ULL},
{"0x7f", 16, 0x7fULL},
{"0x80", 16, 0x80ULL},
{"0x81", 16, 0x81ULL},
{"0xff", 16, 0xffULL},
{"0x100", 16, 0x100ULL},
{"0x101", 16, 0x101ULL},
{"0x7fff", 16, 0x7fffULL},
{"0x8000", 16, 0x8000ULL},
{"0x8001", 16, 0x8001ULL},
{"0xffff", 16, 0xffffULL},
{"0x10000", 16, 0x10000ULL},
{"0x10001", 16, 0x10001ULL},
{"0x7fffffff", 16, 0x7fffffffULL},
{"0x80000000", 16, 0x80000000ULL},
{"0x80000001", 16, 0x80000001ULL},
{"0xffffffff", 16, 0xffffffffULL},
{"0x100000000", 16, 0x100000000ULL},
{"0x100000001", 16, 0x100000001ULL},
{"0x7fffffffffffffff", 16, 0x7fffffffffffffffULL},
{"0x8000000000000000", 16, 0x8000000000000000ULL},
{"0x8000000000000001", 16, 0x8000000000000001ULL},
{"0xfffffffffffffffe", 16, 0xfffffffffffffffeULL},
{"0xffffffffffffffff", 16, 0xffffffffffffffffULL},
{"0\n", 0, 0ULL},
};
TEST_OK(kstrtoull, unsigned long long, "%llu", test_ull_ok);
}
static void __init test_kstrtoull_fail(void)
{
static DEFINE_TEST_FAIL(test_ull_fail) = {
{"", 0},
{"", 8},
{"", 10},
{"", 16},
{"\n", 0},
{"\n", 8},
{"\n", 10},
{"\n", 16},
{"\n0", 0},
{"\n0", 8},
{"\n0", 10},
{"\n0", 16},
{"+", 0},
{"+", 8},
{"+", 10},
{"+", 16},
{"-", 0},
{"-", 8},
{"-", 10},
{"-", 16},
{"0x", 0},
{"0x", 16},
{"0X", 0},
{"0X", 16},
{"0 ", 0},
{"1+", 0},
{"1-", 0},
{" 2", 0},
/* base autodetection */
{"0x0z", 0},
{"0z", 0},
{"a", 0},
/* digit >= base */
{"2", 2},
{"8", 8},
{"a", 10},
{"A", 10},
{"g", 16},
{"G", 16},
/* overflow */
{"10000000000000000000000000000000000000000000000000000000000000000", 2},
{"2000000000000000000000", 8},
{"18446744073709551616", 10},
{"10000000000000000", 16},
/* negative */
{"-0", 0},
{"-0", 8},
{"-0", 10},
{"-0", 16},
{"-1", 0},
{"-1", 8},
{"-1", 10},
{"-1", 16},
/* sign is first character if any */
{"-+1", 0},
{"-+1", 8},
{"-+1", 10},
{"-+1", 16},
/* nothing after \n */
{"0\n0", 0},
{"0\n0", 8},
{"0\n0", 10},
{"0\n0", 16},
{"0\n+", 0},
{"0\n+", 8},
{"0\n+", 10},
{"0\n+", 16},
{"0\n-", 0},
{"0\n-", 8},
{"0\n-", 10},
{"0\n-", 16},
{"0\n ", 0},
{"0\n ", 8},
{"0\n ", 10},
{"0\n ", 16},
};
TEST_FAIL(kstrtoull, unsigned long long, "%llu", test_ull_fail);
}
static void __init test_kstrtoll_ok(void)
{
DECLARE_TEST_OK(long long, struct test_ll);
static DEFINE_TEST_OK(struct test_ll, test_ll_ok) = {
{"0", 10, 0LL},
{"1", 10, 1LL},
{"127", 10, 127LL},
{"128", 10, 128LL},
{"129", 10, 129LL},
{"255", 10, 255LL},
{"256", 10, 256LL},
{"257", 10, 257LL},
{"32767", 10, 32767LL},
{"32768", 10, 32768LL},
{"32769", 10, 32769LL},
{"65535", 10, 65535LL},
{"65536", 10, 65536LL},
{"65537", 10, 65537LL},
{"2147483647", 10, 2147483647LL},
{"2147483648", 10, 2147483648LL},
{"2147483649", 10, 2147483649LL},
{"4294967295", 10, 4294967295LL},
{"4294967296", 10, 4294967296LL},
{"4294967297", 10, 4294967297LL},
{"9223372036854775807", 10, 9223372036854775807LL},
{"-1", 10, -1LL},
{"-2", 10, -2LL},
{"-9223372036854775808", 10, LLONG_MIN},
};
TEST_OK(kstrtoll, long long, "%lld", test_ll_ok);
}
static void __init test_kstrtoll_fail(void)
{
static DEFINE_TEST_FAIL(test_ll_fail) = {
{"9223372036854775808", 10},
{"9223372036854775809", 10},
{"18446744073709551614", 10},
{"18446744073709551615", 10},
{"-9223372036854775809", 10},
{"-18446744073709551614", 10},
{"-18446744073709551615", 10},
/* negative zero isn't an integer in Linux */
{"-0", 0},
{"-0", 8},
{"-0", 10},
{"-0", 16},
/* sign is first character if any */
{"-+1", 0},
{"-+1", 8},
{"-+1", 10},
{"-+1", 16},
};
TEST_FAIL(kstrtoll, long long, "%lld", test_ll_fail);
}
static void __init test_kstrtou64_ok(void)
{
DECLARE_TEST_OK(u64, struct test_u64);
static DEFINE_TEST_OK(struct test_u64, test_u64_ok) = {
{"0", 10, 0},
{"1", 10, 1},
{"126", 10, 126},
{"127", 10, 127},
{"128", 10, 128},
{"129", 10, 129},
{"254", 10, 254},
{"255", 10, 255},
{"256", 10, 256},
{"257", 10, 257},
{"32766", 10, 32766},
{"32767", 10, 32767},
{"32768", 10, 32768},
{"32769", 10, 32769},
{"65534", 10, 65534},
{"65535", 10, 65535},
{"65536", 10, 65536},
{"65537", 10, 65537},
{"2147483646", 10, 2147483646},
{"2147483647", 10, 2147483647},
{"2147483648", 10, 2147483648},
{"2147483649", 10, 2147483649},
{"4294967294", 10, 4294967294},
{"4294967295", 10, 4294967295},
{"4294967296", 10, 4294967296},
{"4294967297", 10, 4294967297},
{"9223372036854775806", 10, 9223372036854775806ULL},
{"9223372036854775807", 10, 9223372036854775807ULL},
{"9223372036854775808", 10, 9223372036854775808ULL},
{"9223372036854775809", 10, 9223372036854775809ULL},
{"18446744073709551614", 10, 18446744073709551614ULL},
{"18446744073709551615", 10, 18446744073709551615ULL},
};
TEST_OK(kstrtou64, u64, "%llu", test_u64_ok);
}
static void __init test_kstrtou64_fail(void)
{
static DEFINE_TEST_FAIL(test_u64_fail) = {
{"-2", 10},
{"-1", 10},
{"18446744073709551616", 10},
{"18446744073709551617", 10},
};
TEST_FAIL(kstrtou64, u64, "%llu", test_u64_fail);
}
static void __init test_kstrtos64_ok(void)
{
DECLARE_TEST_OK(s64, struct test_s64);
static DEFINE_TEST_OK(struct test_s64, test_s64_ok) = {
{"-128", 10, -128},
{"-127", 10, -127},
{"-1", 10, -1},
{"0", 10, 0},
{"1", 10, 1},
{"126", 10, 126},
{"127", 10, 127},
{"128", 10, 128},
{"129", 10, 129},
{"254", 10, 254},
{"255", 10, 255},
{"256", 10, 256},
{"257", 10, 257},
{"32766", 10, 32766},
{"32767", 10, 32767},
{"32768", 10, 32768},
{"32769", 10, 32769},
{"65534", 10, 65534},
{"65535", 10, 65535},
{"65536", 10, 65536},
{"65537", 10, 65537},
{"2147483646", 10, 2147483646},
{"2147483647", 10, 2147483647},
{"2147483648", 10, 2147483648},
{"2147483649", 10, 2147483649},
{"4294967294", 10, 4294967294},
{"4294967295", 10, 4294967295},
{"4294967296", 10, 4294967296},
{"4294967297", 10, 4294967297},
{"9223372036854775806", 10, 9223372036854775806LL},
{"9223372036854775807", 10, 9223372036854775807LL},
};
TEST_OK(kstrtos64, s64, "%lld", test_s64_ok);
}
static void __init test_kstrtos64_fail(void)
{
static DEFINE_TEST_FAIL(test_s64_fail) = {
{"9223372036854775808", 10},
{"9223372036854775809", 10},
{"18446744073709551614", 10},
{"18446744073709551615", 10},
{"18446744073709551616", 10},
{"18446744073709551617", 10},
};
TEST_FAIL(kstrtos64, s64, "%lld", test_s64_fail);
}
static void __init test_kstrtou32_ok(void)
{
DECLARE_TEST_OK(u32, struct test_u32);
static DEFINE_TEST_OK(struct test_u32, test_u32_ok) = {
{"0", 10, 0},
{"1", 10, 1},
{"126", 10, 126},
{"127", 10, 127},
{"128", 10, 128},
{"129", 10, 129},
{"254", 10, 254},
{"255", 10, 255},
{"256", 10, 256},
{"257", 10, 257},
{"32766", 10, 32766},
{"32767", 10, 32767},
{"32768", 10, 32768},
{"32769", 10, 32769},
{"65534", 10, 65534},
{"65535", 10, 65535},
{"65536", 10, 65536},
{"65537", 10, 65537},
{"2147483646", 10, 2147483646},
{"2147483647", 10, 2147483647},
{"2147483648", 10, 2147483648},
{"2147483649", 10, 2147483649},
{"4294967294", 10, 4294967294},
{"4294967295", 10, 4294967295},
};
TEST_OK(kstrtou32, u32, "%u", test_u32_ok);
}
static void __init test_kstrtou32_fail(void)
{
static DEFINE_TEST_FAIL(test_u32_fail) = {
{"-2", 10},
{"-1", 10},
{"4294967296", 10},
{"4294967297", 10},
{"9223372036854775806", 10},
{"9223372036854775807", 10},
{"9223372036854775808", 10},
{"9223372036854775809", 10},
{"18446744073709551614", 10},
{"18446744073709551615", 10},
{"18446744073709551616", 10},
{"18446744073709551617", 10},
};
TEST_FAIL(kstrtou32, u32, "%u", test_u32_fail);
}
static void __init test_kstrtos32_ok(void)
{
DECLARE_TEST_OK(s32, struct test_s32);
static DEFINE_TEST_OK(struct test_s32, test_s32_ok) = {
{"-128", 10, -128},
{"-127", 10, -127},
{"-1", 10, -1},
{"0", 10, 0},
{"1", 10, 1},
{"126", 10, 126},
{"127", 10, 127},
{"128", 10, 128},
{"129", 10, 129},
{"254", 10, 254},
{"255", 10, 255},
{"256", 10, 256},
{"257", 10, 257},
{"32766", 10, 32766},
{"32767", 10, 32767},
{"32768", 10, 32768},
{"32769", 10, 32769},
{"65534", 10, 65534},
{"65535", 10, 65535},
{"65536", 10, 65536},
{"65537", 10, 65537},
{"2147483646", 10, 2147483646},
{"2147483647", 10, 2147483647},
};
TEST_OK(kstrtos32, s32, "%d", test_s32_ok);
}
static void __init test_kstrtos32_fail(void)
{
static DEFINE_TEST_FAIL(test_s32_fail) = {
{"2147483648", 10},
{"2147483649", 10},
{"4294967294", 10},
{"4294967295", 10},
{"4294967296", 10},
{"4294967297", 10},
{"9223372036854775806", 10},
{"9223372036854775807", 10},
{"9223372036854775808", 10},
{"9223372036854775809", 10},
{"18446744073709551614", 10},
{"18446744073709551615", 10},
{"18446744073709551616", 10},
{"18446744073709551617", 10},
};
TEST_FAIL(kstrtos32, s32, "%d", test_s32_fail);
}
static void __init test_kstrtou16_ok(void)
{
DECLARE_TEST_OK(u16, struct test_u16);
static DEFINE_TEST_OK(struct test_u16, test_u16_ok) = {
{"0", 10, 0},
{"1", 10, 1},
{"126", 10, 126},
{"127", 10, 127},
{"128", 10, 128},
{"129", 10, 129},
{"254", 10, 254},
{"255", 10, 255},
{"256", 10, 256},
{"257", 10, 257},
{"32766", 10, 32766},
{"32767", 10, 32767},
{"32768", 10, 32768},
{"32769", 10, 32769},
{"65534", 10, 65534},
{"65535", 10, 65535},
};
TEST_OK(kstrtou16, u16, "%hu", test_u16_ok);
}
static void __init test_kstrtou16_fail(void)
{
static DEFINE_TEST_FAIL(test_u16_fail) = {
{"-2", 10},
{"-1", 10},
{"65536", 10},
{"65537", 10},
{"2147483646", 10},
{"2147483647", 10},
{"2147483648", 10},
{"2147483649", 10},
{"4294967294", 10},
{"4294967295", 10},
{"4294967296", 10},
{"4294967297", 10},
{"9223372036854775806", 10},
{"9223372036854775807", 10},
{"9223372036854775808", 10},
{"9223372036854775809", 10},
{"18446744073709551614", 10},
{"18446744073709551615", 10},
{"18446744073709551616", 10},
{"18446744073709551617", 10},
};
TEST_FAIL(kstrtou16, u16, "%hu", test_u16_fail);
}
static void __init test_kstrtos16_ok(void)
{
DECLARE_TEST_OK(s16, struct test_s16);
static DEFINE_TEST_OK(struct test_s16, test_s16_ok) = {
{"-130", 10, -130},
{"-129", 10, -129},
{"-128", 10, -128},
{"-127", 10, -127},
{"-1", 10, -1},
{"0", 10, 0},
{"1", 10, 1},
{"126", 10, 126},
{"127", 10, 127},
{"128", 10, 128},
{"129", 10, 129},
{"254", 10, 254},
{"255", 10, 255},
{"256", 10, 256},
{"257", 10, 257},
{"32766", 10, 32766},
{"32767", 10, 32767},
};
TEST_OK(kstrtos16, s16, "%hd", test_s16_ok);
}
static void __init test_kstrtos16_fail(void)
{
static DEFINE_TEST_FAIL(test_s16_fail) = {
{"32768", 10},
{"32769", 10},
{"65534", 10},
{"65535", 10},
{"65536", 10},
{"65537", 10},
{"2147483646", 10},
{"2147483647", 10},
{"2147483648", 10},
{"2147483649", 10},
{"4294967294", 10},
{"4294967295", 10},
{"4294967296", 10},
{"4294967297", 10},
{"9223372036854775806", 10},
{"9223372036854775807", 10},
{"9223372036854775808", 10},
{"9223372036854775809", 10},
{"18446744073709551614", 10},
{"18446744073709551615", 10},
{"18446744073709551616", 10},
{"18446744073709551617", 10},
};
TEST_FAIL(kstrtos16, s16, "%hd", test_s16_fail);
}
static void __init test_kstrtou8_ok(void)
{
DECLARE_TEST_OK(u8, struct test_u8);
static DEFINE_TEST_OK(struct test_u8, test_u8_ok) = {
{"0", 10, 0},
{"1", 10, 1},
{"126", 10, 126},
{"127", 10, 127},
{"128", 10, 128},
{"129", 10, 129},
{"254", 10, 254},
{"255", 10, 255},
};
TEST_OK(kstrtou8, u8, "%hhu", test_u8_ok);
}
static void __init test_kstrtou8_fail(void)
{
static DEFINE_TEST_FAIL(test_u8_fail) = {
{"-2", 10},
{"-1", 10},
{"256", 10},
{"257", 10},
{"32766", 10},
{"32767", 10},
{"32768", 10},
{"32769", 10},
{"65534", 10},
{"65535", 10},
{"65536", 10},
{"65537", 10},
{"2147483646", 10},
{"2147483647", 10},
{"2147483648", 10},
{"2147483649", 10},
{"4294967294", 10},
{"4294967295", 10},
{"4294967296", 10},
{"4294967297", 10},
{"9223372036854775806", 10},
{"9223372036854775807", 10},
{"9223372036854775808", 10},
{"9223372036854775809", 10},
{"18446744073709551614", 10},
{"18446744073709551615", 10},
{"18446744073709551616", 10},
{"18446744073709551617", 10},
};
TEST_FAIL(kstrtou8, u8, "%hhu", test_u8_fail);
}
static void __init test_kstrtos8_ok(void)
{
DECLARE_TEST_OK(s8, struct test_s8);
static DEFINE_TEST_OK(struct test_s8, test_s8_ok) = {
{"-128", 10, -128},
{"-127", 10, -127},
{"-1", 10, -1},
{"0", 10, 0},
{"1", 10, 1},
{"126", 10, 126},
{"127", 10, 127},
};
TEST_OK(kstrtos8, s8, "%hhd", test_s8_ok);
}
static void __init test_kstrtos8_fail(void)
{
static DEFINE_TEST_FAIL(test_s8_fail) = {
{"-130", 10},
{"-129", 10},
{"128", 10},
{"129", 10},
{"254", 10},
{"255", 10},
{"256", 10},
{"257", 10},
{"32766", 10},
{"32767", 10},
{"32768", 10},
{"32769", 10},
{"65534", 10},
{"65535", 10},
{"65536", 10},
{"65537", 10},
{"2147483646", 10},
{"2147483647", 10},
{"2147483648", 10},
{"2147483649", 10},
{"4294967294", 10},
{"4294967295", 10},
{"4294967296", 10},
{"4294967297", 10},
{"9223372036854775806", 10},
{"9223372036854775807", 10},
{"9223372036854775808", 10},
{"9223372036854775809", 10},
{"18446744073709551614", 10},
{"18446744073709551615", 10},
{"18446744073709551616", 10},
{"18446744073709551617", 10},
};
TEST_FAIL(kstrtos8, s8, "%hhd", test_s8_fail);
}
static int __init test_kstrtox_init(void)
{
test_kstrtoull_ok();
test_kstrtoull_fail();
test_kstrtoll_ok();
test_kstrtoll_fail();
test_kstrtou64_ok();
test_kstrtou64_fail();
test_kstrtos64_ok();
test_kstrtos64_fail();
test_kstrtou32_ok();
test_kstrtou32_fail();
test_kstrtos32_ok();
test_kstrtos32_fail();
test_kstrtou16_ok();
test_kstrtou16_fail();
test_kstrtos16_ok();
test_kstrtos16_fail();
test_kstrtou8_ok();
test_kstrtou8_fail();
test_kstrtos8_ok();
test_kstrtos8_fail();
return -EINVAL;
}
module_init(test_kstrtox_init);
MODULE_LICENSE("Dual BSD/GPL");
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