public FSAFloat() {
this._state = State.START;
this._intPart = 0;
this._fracPart = 0;
this._fracCount = 0;
this._expPart = 0;
this._suffix = TokenFloat.FloatSuffix.NONE;
this._expPos = true;
this._raw = "";
}
public override void Reset()
{
this._state = State.START;
this._intPart = 0;
this._fracPart = 0;
this._fracCount = 0;
this._expPart = 0;
this._suffix = TokenFloat.FloatSuffix.NONE;
this._expPos = true;
this._raw = "";
}
public override void ReadChar(Char ch)
{
this._raw += ch;
switch (this._state)
{
case State.ERROR:
case State.END:
this._state = State.ERROR;
break;
case State.START:
if (Char.IsDigit(ch))
{
this._intPart = ch - '0';
this._state = State.D;
}
else if (ch == '.')
{
this._state = State.P;
}
else
{
this._state = State.ERROR;
}
break;
case State.D:
if (Char.IsDigit(ch))
{
this._intPart *= 10;
this._intPart += ch - '0';
this._state = State.D;
}
else if (ch == 'e' || ch == 'E')
{
this._state = State.DE;
}
else if (ch == '.')
{
this._state = State.DP;
}
else
{
this._state = State.ERROR;
}
break;
case State.P:
if (Char.IsDigit(ch))
{
this._fracPart = ch - '0';
this._fracCount = 1;
this._state = State.PD;
}
else
{
this._state = State.ERROR;
}
break;
case State.DP:
if (Char.IsDigit(ch))
{
this._fracPart = ch - '0';
this._fracCount = 1;
this._state = State.PD;
}
else if (ch == 'e' || ch == 'E')
{
this._state = State.DE;
}
else if (ch == 'f' || ch == 'F')
{
this._suffix = TokenFloat.FloatSuffix.F;
this._state = State.PDF;
}
else if (ch == 'l' || ch == 'L')
{
this._suffix = TokenFloat.FloatSuffix.L;
this._state = State.DPL;
}
else
{
this._state = State.END;
}
break;
case State.PD:
if (Char.IsDigit(ch))
{
this._fracPart *= 10;
this._fracPart += ch - '0';
this._fracCount++;
this._state = State.PD;
}
else if (ch == 'e' || ch == 'E')
{
this._state = State.DE;
}
else if (ch == 'f' || ch == 'F')
{
this._suffix = TokenFloat.FloatSuffix.F;
this._state = State.PDF;
}
else if (ch == 'l' || ch == 'L')
{
this._suffix = TokenFloat.FloatSuffix.L;
this._state = State.DPL;
}
else
{
this._state = State.END;
}
break;
case State.DE:
if (Char.IsDigit(ch))
{
this._expPart = ch - '0';
this._state = State.DED;
}
else if (ch == '+' || ch == '-')
{
if (ch == '-')
{
this._expPos = false;
}
this._state = State.DES;
}
else
{
this._state = State.ERROR;
}
break;
case State.DES:
if (Char.IsDigit(ch))
{
this._expPart = ch - '0';
this._state = State.DED;
}
else
{
this._state = State.ERROR;
}
break;
case State.DPL:
this._suffix = TokenFloat.FloatSuffix.L;
this._state = State.END;
break;
case State.DED:
if (Char.IsDigit(ch))
{
this._expPart *= 10;
this._expPart += ch - '0';
this._state = State.DED;
}
else if (ch == 'f' || ch == 'F')
{
this._suffix = TokenFloat.FloatSuffix.F;
this._state = State.PDF;
}
else if (ch == 'l' || ch == 'L')
{
this._suffix = TokenFloat.FloatSuffix.L;
this._state = State.DPL;
}
else
{
this._state = State.END;
}
break;
case State.PDF:
this._state = State.END;
break;
default:
this._state = State.ERROR;
break;
}
}
public override void ReadChar(Char ch) {
this._raw += ch;
switch (this._state) {
case State.ERROR:
case State.END:
this._state = State.ERROR;
break;
case State.START:
if (Char.IsDigit(ch)) {
this._intPart = ch - '0';
this._state = State.D;
} else if (ch == '.') {
this._state = State.P;
} else {
this._state = State.ERROR;
}
break;
case State.D:
if (Char.IsDigit(ch)) {
this._intPart *= 10;
this._intPart += ch - '0';
this._state = State.D;
} else if (ch == 'e' || ch == 'E') {
this._state = State.DE;
} else if (ch == '.') {
this._state = State.DP;
} else {
this._state = State.ERROR;
}
break;
case State.P:
if (Char.IsDigit(ch)) {
this._fracPart = ch - '0';
this._fracCount = 1;
this._state = State.PD;
} else {
this._state = State.ERROR;
}
break;
case State.DP:
if (Char.IsDigit(ch)) {
this._fracPart = ch - '0';
this._fracCount = 1;
this._state = State.PD;
} else if (ch == 'e' || ch == 'E') {
this._state = State.DE;
} else if (ch == 'f' || ch == 'F') {
this._suffix = TokenFloat.FloatSuffix.F;
this._state = State.PDF;
} else if (ch == 'l' || ch == 'L') {
this._suffix = TokenFloat.FloatSuffix.L;
this._state = State.DPL;
} else {
this._state = State.END;
}
break;
case State.PD:
if (Char.IsDigit(ch)) {
this._fracPart *= 10;
this._fracPart += ch - '0';
this._fracCount++;
this._state = State.PD;
} else if (ch == 'e' || ch == 'E') {
this._state = State.DE;
} else if (ch == 'f' || ch == 'F') {
this._suffix = TokenFloat.FloatSuffix.F;
this._state = State.PDF;
} else if (ch == 'l' || ch == 'L') {
this._suffix = TokenFloat.FloatSuffix.L;
this._state = State.DPL;
} else {
this._state = State.END;
}
break;
case State.DE:
if (Char.IsDigit(ch)) {
this._expPart = ch - '0';
this._state = State.DED;
} else if (ch == '+' || ch == '-') {
if (ch == '-') {
this._expPos = false;
}
this._state = State.DES;
} else {
this._state = State.ERROR;
}
break;
case State.DES:
if (Char.IsDigit(ch)) {
this._expPart = ch - '0';
this._state = State.DED;
} else {
this._state = State.ERROR;
}
break;
case State.DPL:
this._suffix = TokenFloat.FloatSuffix.L;
this._state = State.END;
break;
case State.DED:
if (Char.IsDigit(ch)) {
this._expPart *= 10;
this._expPart += ch - '0';
this._state = State.DED;
} else if (ch == 'f' || ch == 'F') {
this._suffix = TokenFloat.FloatSuffix.F;
this._state = State.PDF;
} else if (ch == 'l' || ch == 'L') {
this._suffix = TokenFloat.FloatSuffix.L;
this._state = State.DPL;
} else {
this._state = State.END;
}
break;
case State.PDF:
this._state = State.END;
break;
default:
this._state = State.ERROR;
break;
}
}
public FloatLiteral(Double value, TokenFloat.FloatSuffix floatSuffix)
{
this.Value = value;
this.FloatSuffix = floatSuffix;
}
