MathLib:IsNullValue(): using a Finite State Machine to determine a string value contains a numeric NULL value. The NULL value can be Integer, Binary, Hex, Octal. The corresponding unit test cases are also included.
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orbitcowboy
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@ -598,13 +598,107 @@ bool MathLib::isLessEqual(const std::string &first, const std::string &second)
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return toDoubleNumber(first) <= toDoubleNumber(second);
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}
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bool MathLib::isNullValue(const std::string &str)
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bool MathLib::isNullValue(const std::string &s)
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{
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enum {START, PLUSMINUS, LEADING_ZERO, BIN_OR_HEX_PREFIX, DOT, TRAILING_ZERO, TRAILING_F, ZERO, E, E_PLUSMINUS, E_DIGIT} state = START;
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for (std::string::const_iterator it = s.begin(); it != s.end(); ++it) {
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switch (state) {
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case START:
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if (*it == '+' || *it == '-')
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state = PLUSMINUS;
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else if (*it == '0')
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state = LEADING_ZERO;
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else if (*it == '.')
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state = DOT;
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else
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return isValidSuffix(it, s.end());
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break;
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case PLUSMINUS:
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if (*it == '0')
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state = LEADING_ZERO;
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else
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return false;
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break;
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case LEADING_ZERO:
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if (*it == '0')
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state = LEADING_ZERO;
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else if (*it == 'b' || *it == 'B')
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state = BIN_OR_HEX_PREFIX;
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else if (*it == 'x' || *it == 'X')
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state = BIN_OR_HEX_PREFIX;
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else if (*it == '.')
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state = DOT;
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else if (*it == 'e' || *it == 'E')
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state = E;
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else
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return isValidSuffix(it, s.end());
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break;
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case BIN_OR_HEX_PREFIX:
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if (*it == '0')
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state = ZERO;
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else
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return false;
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break;
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case ZERO:
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if (*it == '0')
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state = ZERO;
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else
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return isValidSuffix(it, s.end());
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break;
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case DOT:
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if (*it == '0')
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state = TRAILING_ZERO;
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else if (*it == 'f' || *it == 'F')
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state = TRAILING_F;
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else if (*it == 'e' || *it == 'E')
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state = E;
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else
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return false;
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break;
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case E:
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if (*it == '+' || *it == '-')
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state = E_PLUSMINUS;
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else if (isdigit(*it))
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state = E_DIGIT;
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else
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return false;
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break;
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case E_PLUSMINUS:
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if (isdigit(*it))
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state = E_DIGIT;
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else
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return false;
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break;
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case E_DIGIT:
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if (isdigit(*it))
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state = E_DIGIT;
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else if (*it == 'f' || *it == 'F')
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state = TRAILING_F;
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else
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return false;
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break;
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case TRAILING_ZERO:
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if (*it == '0')
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state = TRAILING_ZERO;
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else if (*it == 'f' || *it == 'F')
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state = TRAILING_F;
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else if (*it == 'e' || *it == 'E')
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state = E;
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else
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return false;
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break;
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default:
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return false;
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}
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}
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return state == LEADING_ZERO || state == ZERO || state == DOT || state == E_DIGIT || state == TRAILING_ZERO || state == TRAILING_F;
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/*
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for (size_t i = 0; i < str.size(); i++) {
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if (std::isdigit(static_cast<unsigned char>(str[i])) && str[i] != '0') // May not contain digits other than 0
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return false;
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}
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return !str.empty() && (std::isdigit(static_cast<unsigned char>(str[0])) || str[0] == '-' || str[0] == '+'); // Has to be a number
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*/
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}
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bool MathLib::isOctalDigit(char c)
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@ -45,7 +45,8 @@ private:
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TEST_CASE(calculate);
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TEST_CASE(calculate1);
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TEST_CASE(convert);
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TEST_CASE(naninf)
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TEST_CASE(naninf);
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TEST_CASE(isNullValue);
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}
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void isGreater() const {
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@ -601,6 +602,169 @@ private:
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ASSERT_EQUALS("inf.0", MathLib::divide("3.0", "0.0")); // inf
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ASSERT_EQUALS("-inf.0", MathLib::divide("-3.0", "0.0")); // -inf (#5142)
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}
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void isNullValue() const {
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// inter zero value
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ASSERT_EQUALS(true, MathLib::isNullValue("0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0"));
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// inter zero value (octal)
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ASSERT_EQUALS(true, MathLib::isNullValue("00"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+00"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-00"));
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// inter zero value (hex)
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ASSERT_EQUALS(true, MathLib::isNullValue("0x0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0x0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0x0"));
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// unsigned integer zero value
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ASSERT_EQUALS(true, MathLib::isNullValue("0U"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0U"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0U"));
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// long integer zero value
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ASSERT_EQUALS(true, MathLib::isNullValue("0L"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0L"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0L"));
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// unsigned long integer zero value
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ASSERT_EQUALS(true, MathLib::isNullValue("0UL"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0UL"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0UL"));
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// unsigned long integer zero value
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ASSERT_EQUALS(true, MathLib::isNullValue("0LU"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0LU"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0LU"));
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// long long integer zero value
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ASSERT_EQUALS(true, MathLib::isNullValue("0LL"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0LL"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0LL"));
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// long long unsigend zero value
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ASSERT_EQUALS(true, MathLib::isNullValue("0LLU"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0LLU"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0LLU"));
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// unsigned long long zero value
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ASSERT_EQUALS(true, MathLib::isNullValue("0ULL"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0ULL"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0ULL"));
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// floating pointer zero value (no trailing zero after dot)
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ASSERT_EQUALS(true, MathLib::isNullValue("0."));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0."));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0."));
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// floating pointer zero value (1 trailing zero after dot)
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ASSERT_EQUALS(true, MathLib::isNullValue("0.0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0.0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0.0"));
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// floating pointer zero value (3 trailing zeros after dot)
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ASSERT_EQUALS(true, MathLib::isNullValue("0.000"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0.000"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0.000"));
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// floating pointer zero value (no trailing zero after dot)
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ASSERT_EQUALS(true, MathLib::isNullValue("00."));
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ASSERT_EQUALS(true, MathLib::isNullValue("+00."));
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ASSERT_EQUALS(true, MathLib::isNullValue("-00."));
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// floating pointer zero value (1 trailing zero after dot)
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ASSERT_EQUALS(true, MathLib::isNullValue("00.0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+00.0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-00.0"));
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// floating pointer zero value (3 trailing zero after dot)
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ASSERT_EQUALS(true, MathLib::isNullValue("00.000"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+00.000"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-00.000"));
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// floating pointer zero value (3 trailing zero after dot)
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ASSERT_EQUALS(true, MathLib::isNullValue(".000"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E0"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E1"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E1"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E1"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E42"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E42"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E42"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E429999"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E429999"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E429999"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E+1"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E+1"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E+1"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E+42"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E+42"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E+42"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E+429999"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E+429999"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E+429999"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E-1"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E-1"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E-1"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E-42"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E-42"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E-42"));
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// integer scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0E-429999"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0E-429999"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0E-429999"));
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// floating point scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0.E0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0.E0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0.E0"));
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// floating point scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0.E-0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0.E-0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0.E+0"));
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// floating point scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0.E+0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0.E+0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0.E+0"));
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// floating point scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("0.00E-0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0.00E-0"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0.00E-0"));
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// floating point scientific notation
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ASSERT_EQUALS(true, MathLib::isNullValue("00000.00E-000000000"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+00000.00E-000000000"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-00000.00E-000000000"));
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// floating point scientific notation (suffix f)
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ASSERT_EQUALS(true, MathLib::isNullValue("0.f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0.f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0.f"));
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// floating point scientific notation (suffix f)
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ASSERT_EQUALS(true, MathLib::isNullValue("0.0f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+0.0f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-0.0f"));
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// floating point scientific notation (suffix f)
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ASSERT_EQUALS(true, MathLib::isNullValue("00.0f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+00.0f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-00.0f"));
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// floating point scientific notation (suffix f)
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ASSERT_EQUALS(true, MathLib::isNullValue("00.00f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+00.00f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-00.00f"));
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// floating point scientific notation (suffix f)
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ASSERT_EQUALS(true, MathLib::isNullValue("00.00E+1f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("+00.00E+1f"));
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ASSERT_EQUALS(true, MathLib::isNullValue("-00.00E+1f"));
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// negative testing
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ASSERT_EQUALS(false, MathLib::isNullValue("0.1"));
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ASSERT_EQUALS(false, MathLib::isNullValue("1.0"));
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ASSERT_EQUALS(false, MathLib::isNullValue("0.01"));
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ASSERT_EQUALS(false, MathLib::isNullValue("-00.01e-12"));
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ASSERT_EQUALS(false, MathLib::isNullValue("-00.01e+12"));
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ASSERT_EQUALS(false, MathLib::isNullValue(""));
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ASSERT_EQUALS(false, MathLib::isNullValue("x"));
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ASSERT_EQUALS(false, MathLib::isNullValue("garbage"));
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// suffix LUL is not allowed
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ASSERT_EQUALS(false, MathLib::isNullValue("0LUL"));
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ASSERT_EQUALS(false, MathLib::isNullValue("+0LUL"));
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ASSERT_EQUALS(false, MathLib::isNullValue("-0LUL"));
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}
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};
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REGISTER_TEST(TestMathLib)
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