public FSAFloat()
{
state = State.START;
int_part = 0;
frac_part = 0;
frac_count = 0;
exp_part = 0;
suffix = TokenFloat.Suffix.NONE;
exp_pos = true;
raw = "";
}
public override sealed void ReadChar(Char ch)
{
raw += ch;
switch (state) {
case State.ERROR:
case State.END:
state = State.ERROR;
break;
case State.START:
if (Char.IsDigit(ch)) {
int_part = ch - '0';
state = State.D;
} else if (ch == '.') {
state = State.P;
} else {
state = State.ERROR;
}
break;
case State.D:
if (Char.IsDigit(ch)) {
int_part *= 10;
int_part += ch - '0';
state = State.D;
} else if (ch == 'e' || ch == 'E') {
state = State.DE;
} else if (ch == '.') {
state = State.DP;
} else {
state = State.ERROR;
}
break;
case State.P:
if (Char.IsDigit(ch)) {
frac_part = ch - '0';
frac_count = 1;
state = State.PD;
} else {
state = State.ERROR;
}
break;
case State.DP:
if (Char.IsDigit(ch)) {
frac_part = ch - '0';
frac_count = 1;
state = State.PD;
} else if (ch == 'e' || ch == 'E') {
state = State.DE;
} else if (ch == 'f' || ch == 'F') {
suffix = TokenFloat.Suffix.F;
state = State.PDF;
} else if (ch == 'l' || ch == 'L') {
suffix = TokenFloat.Suffix.L;
state = State.DPL;
} else {
state = State.END;
}
break;
case State.PD:
if (Char.IsDigit(ch)) {
frac_part *= 10;
frac_part += ch - '0';
frac_count++;
state = State.PD;
} else if (ch == 'e' || ch == 'E') {
state = State.DE;
} else if (ch == 'f' || ch == 'F') {
suffix = TokenFloat.Suffix.F;
state = State.PDF;
} else if (ch == 'l' || ch == 'L') {
suffix = TokenFloat.Suffix.L;
state = State.DPL;
} else {
state = State.END;
}
break;
case State.DE:
if (Char.IsDigit(ch)) {
exp_part = ch - '0';
state = State.DED;
} else if (ch == '+' || ch == '-') {
if (ch == '-') {
exp_pos = false;
}
state = State.DES;
} else {
state = State.ERROR;
}
break;
case State.DES:
if (Char.IsDigit(ch)) {
exp_part = ch - '0';
state = State.DED;
} else {
state = State.ERROR;
}
break;
case State.DPL:
suffix = TokenFloat.Suffix.L;
state = State.END;
break;
case State.DED:
if (Char.IsDigit(ch)) {
exp_part *= 10;
exp_part += ch - '0';
state = State.DED;
} else if (ch == 'f' || ch == 'F') {
suffix = TokenFloat.Suffix.F;
state = State.PDF;
} else if (ch == 'l' || ch == 'L') {
suffix = TokenFloat.Suffix.L;
state = State.DPL;
} else {
state = State.END;
}
break;
case State.PDF:
state = State.END;
break;
default:
state = State.ERROR;
break;
}
}
public override sealed void Reset()
{
state = State.START;
int_part = 0;
frac_part = 0;
frac_count = 0;
exp_part = 0;
suffix = TokenFloat.Suffix.NONE;
exp_pos = true;
raw = "";
}
public ConstFloat(Double value, TokenFloat.Suffix suffix)
{
this.value = value;
this.suffix = suffix;
}
