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#7160 Internal error: Unhandled char constant '\1'. Correct MathLib::toLongNumber. Create new utility function MathLib::characterLiteralToLongNumber

This commit is contained in:
Alexander Mai 2015-11-21 22:35:58 +01:00
parent 5f68f3ddf6
commit 714579401f
3 changed files with 82 additions and 45 deletions
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116
lib/mathlib.cpp
View File

@ -313,6 +313,76 @@ MathLib::biguint MathLib::toULongNumber(const std::string & str)
return ret;
}
MathLib::bigint MathLib::characterLiteralToLongNumber(const std::string& str)
{
if (str.size()==1)
return str[0] & 0xff;
if (str[0] != '\\')
throw InternalError(0, "Internal Error. MathLib::toLongNumber: Unhandled char constant " + str);
if (str[1]=='x') {
return toLongNumber("0x" + str.substr(2));
}
char c;
switch (str.size()-1) {
case 1:
switch (str[1]) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
return str[1]-'0';
case 'a':
c = '\a';
break;
case 'b':
c = '\b';
break;
case 'f':
c = '\f';
break;
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case 'v':
c = '\v';
break;
case '\\':
case '\?':
case '\'':
case '\"':
c = str[1];
break;
default:
throw InternalError(0, "Internal Error. MathLib::toLongNumber: Unhandled char constant " + str);
break;
}
return c & 0xff;
case 2:
if (isOctalDigit(str[1]) && isOctalDigit(str[2]))
return toLongNumber("0" + str.substr(1));
break;
case 3:
if (isOctalDigit(str[1]) && isOctalDigit(str[2]) && isOctalDigit(str[3]))
return toLongNumber("0" + str.substr(1));
break;
}
throw InternalError(0, "Internal Error. MathLib::toLongNumber: Unhandled char constant " + str);
}
MathLib::bigint MathLib::toLongNumber(const std::string & str)
{
// hexadecimal numbers:
@ -364,51 +434,7 @@ MathLib::bigint MathLib::toLongNumber(const std::string & str)
}
if (str[0] == '\'' && str.size() >= 3U && str[str.size()-1U] == '\'') {
char c;
if (str.size() == 3U)
c = str[1];
else if (str[1] == '\\' && str.size() == 4U) {
switch (str[2]) {
case '0':
c = '\0';
break;
case 'a':
c = '\a';
break;
case 'b':
c = '\b';
break;
case 'f':
c = '\f';
break;
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case 'v':
c = '\v';
break;
case '\\':
case '\?':
case '\'':
case '\"':
c = str[2];
break;
default:
throw InternalError(0, "Internal Error. MathLib::toLongNumber: Unhandled char constant " + str);
}
} else if (str[1] == '\\' && str[2] == '0' && str.size() == 6U) {
return toLongNumber(str.substr(2,3));
} else if (str[1] == '\\' && str[2] == 'x' && str.size() == 6U) {
return toLongNumber("0" + str.substr(2,3));
} else
throw InternalError(0, "Internal Error. MathLib::toLongNumber: Unhandled char constant " + str);
return c & 0xff;
return characterLiteralToLongNumber(str.substr(1,str.size()-2));
}
bigint ret = 0;

3
lib/mathlib.h
View File

@ -113,6 +113,9 @@ public:
* @return true if given character is octal digit.
*/
static bool isOctalDigit(char c);
private:
static MathLib::bigint characterLiteralToLongNumber(const std::string& str);
};
MathLib::value operator+(const MathLib::value &v1, const MathLib::value &v2);

8
test/testmathlib.cpp
View File

@ -271,9 +271,17 @@ private:
// from char
ASSERT_EQUALS((int)('A'), MathLib::toLongNumber("'A'"));
ASSERT_EQUALS((int)('\0'), MathLib::toLongNumber("'\\0'"));
ASSERT_EQUALS((int)('\r'), MathLib::toLongNumber("'\\r'"));
ASSERT_EQUALS((int)('\x12'), MathLib::toLongNumber("'\\x12'"));
// may cause some compile problems: ASSERT_EQUALS((int)('\x123'), MathLib::toLongNumber("'\\x123'"));
// may cause some compile problems: ASSERT_EQUALS((int)('\x1234'), MathLib::toLongNumber("'\\x1234'"));
ASSERT_EQUALS((int)('\3'), MathLib::toLongNumber("'\\3'"));
ASSERT_EQUALS((int)('\34'), MathLib::toLongNumber("'\\34'"));
ASSERT_EQUALS((int)('\034'), MathLib::toLongNumber("'\\034'"));
ASSERT_EQUALS((int)('\134'), MathLib::toLongNumber("'\\134'"));
ASSERT_THROW(MathLib::toLongNumber("'\\9'"), InternalError);
ASSERT_THROW(MathLib::toLongNumber("'\\934'"), InternalError);
ASSERT_EQUALS(-8552249625308161526, MathLib::toLongNumber("0x89504e470d0a1a0a"));
ASSERT_EQUALS(-8481036456200365558, MathLib::toLongNumber("0x8a4d4e470d0a1a0a"));