diff options
| -rw-r--r-- | src/test/util_tests.cpp | 22 | ||||
| -rw-r--r-- | src/util.cpp | 14 | ||||
| -rw-r--r-- | src/util.h | 7 |
3 files changed, 43 insertions, 0 deletions
diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp index b8f107f644..7e7c05a59d 100644 --- a/src/test/util_tests.cpp +++ b/src/test/util_tests.cpp @@ -342,4 +342,26 @@ BOOST_AUTO_TEST_CASE(gettime) BOOST_CHECK((GetTime() & ~0xFFFFFFFFLL) == 0); } +BOOST_AUTO_TEST_CASE(test_ParseInt32) +{ + int32_t n; + // Valid values + BOOST_CHECK(ParseInt32("1234", NULL)); + BOOST_CHECK(ParseInt32("0", &n) && n == 0); + BOOST_CHECK(ParseInt32("1234", &n) && n == 1234); + BOOST_CHECK(ParseInt32("01234", &n) && n == 1234); // no octal + BOOST_CHECK(ParseInt32("2147483647", &n) && n == 2147483647); + BOOST_CHECK(ParseInt32("-2147483648", &n) && n == -2147483648); + BOOST_CHECK(ParseInt32("-1234", &n) && n == -1234); + // Invalid values + BOOST_CHECK(!ParseInt32("1a", &n)); + BOOST_CHECK(!ParseInt32("aap", &n)); + BOOST_CHECK(!ParseInt32("0x1", &n)); // no hex + // Overflow and underflow + BOOST_CHECK(!ParseInt32("-2147483649", NULL)); + BOOST_CHECK(!ParseInt32("2147483648", NULL)); + BOOST_CHECK(!ParseInt32("-32482348723847471234", NULL)); + BOOST_CHECK(!ParseInt32("32482348723847471234", NULL)); +} + BOOST_AUTO_TEST_SUITE_END() diff --git a/src/util.cpp b/src/util.cpp index a919b4b854..36ac23b1d5 100644 --- a/src/util.cpp +++ b/src/util.cpp @@ -1427,3 +1427,17 @@ void RenameThread(const char* name) #endif } +bool ParseInt32(const std::string& str, int32_t *out) +{ + char *endp = NULL; + errno = 0; // strtol will not set errno if valid + long int n = strtol(str.c_str(), &endp, 10); + if(out) *out = (int)n; + // Note that strtol returns a *long int*, so even if strtol doesn't report a over/underflow + // we still have to check that the returned value is within the range of an *int32_t*. On 64-bit + // platforms the size of these types may be different. + return endp && *endp == 0 && !errno && + n >= std::numeric_limits<int32_t>::min() && + n <= std::numeric_limits<int32_t>::max(); +} + diff --git a/src/util.h b/src/util.h index fbd841f7a8..fa1e664c92 100644 --- a/src/util.h +++ b/src/util.h @@ -256,6 +256,13 @@ inline int atoi(const std::string& str) return atoi(str.c_str()); } +/** + * Convert string to signed 32-bit integer with strict parse error feedback. + * @returns true if the entire string could be parsed as valid integer, + * false if not the entire string could be parsed or when overflow or underflow occured. + */ +bool ParseInt32(const std::string& str, int32_t *out); + inline int roundint(double d) { return (int)(d > 0 ? d + 0.5 : d - 0.5); |