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test-cutils: Cover qemu_strtosz() around range limits 

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1487708048-2131-14-git-send-email-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2017-02-21 21:13:57 +01:00
parent a6b4373fa2
commit 0b742797aa
1 changed files with 59 additions and 2 deletions
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61
tests/test-cutils.c
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@ -1371,16 +1371,52 @@ static void test_qemu_strtou64_full_max(void)
static void test_qemu_strtosz_simple(void)
{
const char *str = "12345M";
const char *str;
char *endptr = NULL;
int64_t res;
str = "0";
res = qemu_strtosz(str, &endptr);
g_assert_cmpint(res, ==, 0);
g_assert(endptr == str + 1);
str = "12345M";
res = qemu_strtosz(str, &endptr);
g_assert_cmpint(res, ==, 12345 * M_BYTE);
g_assert(endptr == str + 6);
res = qemu_strtosz(str, NULL);
g_assert_cmpint(res, ==, 12345 * M_BYTE);
/* Note: precision is 53 bits since we're parsing with strtod() */
str = "9007199254740991"; /* 2^53-1 */
res = qemu_strtosz_suffix(str, &endptr, QEMU_STRTOSZ_DEFSUFFIX_B);
g_assert_cmpint(res, ==, 0x1fffffffffffff);
g_assert(endptr == str + 16);
str = "9007199254740992"; /* 2^53 */
res = qemu_strtosz_suffix(str, &endptr, QEMU_STRTOSZ_DEFSUFFIX_B);
g_assert_cmpint(res, ==, 0x20000000000000);
g_assert(endptr == str + 16);
str = "9007199254740993"; /* 2^53+1 */
res = qemu_strtosz_suffix(str, &endptr, QEMU_STRTOSZ_DEFSUFFIX_B);
g_assert_cmpint(res, ==, 0x20000000000000); /* rounded to 53 bits */
g_assert(endptr == str + 16);
str = "9223372036854774784"; /* 0x7ffffffffffffc00 (53 msbs set) */
res = qemu_strtosz_suffix(str, &endptr, QEMU_STRTOSZ_DEFSUFFIX_B);
g_assert_cmpint(res, ==, 0x7ffffffffffffc00);
g_assert(endptr == str + 19);
str = "9223372036854775295"; /* 0x7ffffffffffffdff */
res = qemu_strtosz_suffix(str, &endptr, QEMU_STRTOSZ_DEFSUFFIX_B);
g_assert_cmpint(res, ==, 0x7ffffffffffffc00); /* rounded to 53 bits */
g_assert(endptr == str + 19);
/* 0x7ffffffffffffe00..0x7fffffffffffffff get rounded to
* 0x8000000000000000, thus -ERANGE; see test_qemu_strtosz_erange() */
}
static void test_qemu_strtosz_units(void)
@ -1482,10 +1518,31 @@ static void test_qemu_strtosz_trailing(void)
static void test_qemu_strtosz_erange(void)
{
const char *str = "10E";
const char *str;
char *endptr = NULL;
int64_t res;
str = "-1";
res = qemu_strtosz(str, &endptr);
g_assert_cmpint(res, ==, -ERANGE);
g_assert(endptr == str + 2);
str = "9223372036854775296"; /* 0x7ffffffffffffe00 */
res = qemu_strtosz_suffix(str, &endptr, QEMU_STRTOSZ_DEFSUFFIX_B);
g_assert_cmpint(res, ==, -ERANGE);
g_assert(endptr == str + 19);
str = "9223372036854775807"; /* 2^63-1 */
res = qemu_strtosz_suffix(str, &endptr, QEMU_STRTOSZ_DEFSUFFIX_B);
g_assert_cmpint(res, ==, -ERANGE);
g_assert(endptr == str + 19);
str = "9223372036854775808"; /* 2^63 */
res = qemu_strtosz_suffix(str, &endptr, QEMU_STRTOSZ_DEFSUFFIX_B);
g_assert_cmpint(res, ==, -ERANGE);
g_assert(endptr == str + 19);
str = "10E";
res = qemu_strtosz(str, &endptr);
g_assert_cmpint(res, ==, -ERANGE);
g_assert(endptr == str + 3);