public PreprocessorContext(ParseContext pc, SymbolLookup symbols)
{
Symbols = symbols;
parseContext = pc;
inComment = false;
InitAtomTable();
InitScanner();
ifdepth = 0;
elseSeen = new bool[MAXIFNESTING];
for (elsetracker = 0; elsetracker < MAXIFNESTING; elsetracker++)
elseSeen[elsetracker] = false;
elsetracker = 0;
inputStack = new Stack<BasePreprocessorInput> ();
buffer = new StringInputBuffer{ name = new char[StringInputBuffer.MAX_TOKEN_LENGTH], tokenText = new char[StringInputBuffer.MAX_TOKEN_LENGTH]};
}
///////////////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////// Floating point constants: /////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////
/*
*/
/// <summary>
/// Scan a single- or double-precision floating point constant. Assumes that the scanner
/// has seen at least one digit, followed by either a decimal '.' or the
/// letter 'e', or a precision ending (e.g., F or LF).
/// </summary>
/// <returns>The float const.</returns>
/// <param name="len">Length.</param>
/// <param name="ch">Ch.</param>
/// <param name="ppToken">Pp token.</param>
internal int lFloatConst(StringInputBuffer buffer, int len, int ch, PreprocessorToken ppToken)
{
bool HasDecimalOrExponent = false;
int declen, exp, ExpSign;
int str_len;
bool isDouble = false;
declen = 0;
exp = 0;
const int MAX_TOKEN_LENGTH = 1024;
str_len=len;
char[] str = buffer.name;
if (ch == '.') {
HasDecimalOrExponent = true;
str[len++] = (char)ch;
ch = getChar();
while (ch >= '0' && ch <= '9')
{
if (len < MAX_TOKEN_LENGTH)
{
declen++;
if (len > 0 || ch != '0') {
str[len] = (char)ch;
len++;
str_len++;
}
ch = getChar();
}
else
{
parseContext.Error( ppToken.loc, "float literal too long", "", "");
len = 1;
str_len = 1;
}
}
}
// Exponent:
if (ch == 'e' || ch == 'E')
{
HasDecimalOrExponent = true;
if (len >= MAX_TOKEN_LENGTH)
{
parseContext.Error( ppToken.loc, "float literal too long", "", "");
len = 1;
str_len=1;
}
else
{
ExpSign = 1;
str[len++] = (char)ch;
ch = getChar();
if (ch == '+')
{
str[len++] = (char)ch;
ch = getChar();
}
else if (ch == '-')
{
ExpSign = -1;
str[len++] = (char)ch;
ch = getChar();
}
if (ch >= '0' && ch <= '9')
{
while (ch >= '0' && ch <= '9')
{
if (len < MAX_TOKEN_LENGTH)
{
exp = exp*10 + ch - '0';
str[len++] = (char)ch;
ch = getChar();
}
else
{
parseContext.Error( ppToken.loc, "float literal too long", "", "");
len = 1;
str_len=1;
}
}
}
else
{
parseContext.Error( ppToken.loc, "bad character in float exponent", "", "");
}
exp *= ExpSign;
}
}
if (len == 0)
{
ppToken.dval = 0.0;
str = "0.0".ToCharArray();
}
else
{
if (ch == 'l' || ch == 'L')
{
parseContext.doubleCheck( ppToken.loc, "double floating-point suffix");
if (! HasDecimalOrExponent)
parseContext.Error( ppToken.loc, "float literal needs a decimal point or exponent", "", "");
int ch2 = getChar();
if (ch2 != 'f' && ch2 != 'F')
{
ungetChar();
ungetChar();
}
else
{
if (len < MAX_TOKEN_LENGTH)
{
str[len++] = (char)ch;
str[len++] = (char)ch2;
isDouble = true;
}
else
{
parseContext.Error( ppToken.loc, "float literal too long", "", "");
len = 1;
str_len=1;
}
}
}
else if (ch == 'f' || ch == 'F')
{
parseContext.ProfileRequires( ppToken.loc, Profile.EsProfile, 300, null, "floating-point suffix");
if ((parseContext.messages & MessageType.RelaxedErrors) == 0)
parseContext.ProfileRequires (ppToken.loc, (Profile)~Profile.EsProfile, 120, null, "floating-point suffix");
if (! HasDecimalOrExponent)
parseContext.Error( ppToken.loc, "float literal needs a decimal point or exponent", "", "");
if (len < MAX_TOKEN_LENGTH)
str[len++] = (char)ch;
else
{
parseContext.Error( ppToken.loc, "float literal too long", "", "");
len = 1;
str_len=1;
}
} else
ungetChar();
//str[len]='\0';
ppToken.dval = Double.Parse(new string(str));
}
if (isDouble)
return (int) CppEnums.DOUBLECONSTANT;
else
return (int) CppEnums.FLOATCONSTANT;
}