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// Generated by re2java
// re2java $INPUT -o $OUTPUT
class Parser {
private String yyinput;
private int yycursor;
private int yymarker;
private int number;
private void add_digit(int base, int offset) throws ArithmeticException {
number = Math.addExact(
Math.multiplyExact(number, base),
yyinput.charAt(yycursor - 1) - offset);
}
public int parse(String str) throws ArithmeticException, IllegalArgumentException {
yyinput = str;
yycursor = 0;
number = 0;
try {
{
char yych = 0;
int yystate = 0;
yyl: while (true) {
switch (yystate) {
case 0:
yych = yyinput.charAt(yycursor);
yycursor += 1;
switch (yych) {
case 0x30:
yystate = 2;
continue yyl;
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x36:
case 0x37:
case 0x38:
case 0x39:
yystate = 4;
continue yyl;
default:
yystate = 1;
continue yyl;
}
case 1:
{ throw new IllegalArgumentException("not a number"); }
case 2:
yymarker = yycursor;
yych = yyinput.charAt(yycursor);
switch (yych) {
case 0x42:
case 0x62:
yycursor += 1;
yystate = 5;
continue yyl;
case 0x58:
case 0x78:
yycursor += 1;
yystate = 7;
continue yyl;
default:
yystate = 3;
continue yyl;
}
case 3:
{ return parse_oct(); }
case 4:
yycursor -= 1;
{ return parse_dec(); }
case 5:
yych = yyinput.charAt(yycursor);
switch (yych) {
case 0x30:
case 0x31:
yycursor += 1;
yystate = 8;
continue yyl;
default:
yystate = 6;
continue yyl;
}
case 6:
yycursor = yymarker;
yystate = 3;
continue yyl;
case 7:
yych = yyinput.charAt(yycursor);
switch (yych) {
case 0x30:
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x36:
case 0x37:
case 0x38:
case 0x39:
case 0x41:
case 0x42:
case 0x43:
case 0x44:
case 0x45:
case 0x46:
case 0x61:
case 0x62:
case 0x63:
case 0x64:
case 0x65:
case 0x66:
yycursor += 1;
yystate = 9;
continue yyl;
default:
yystate = 6;
continue yyl;
}
case 8:
yycursor -= 1;
{ return parse_bin(); }
case 9:
yycursor -= 1;
{ return parse_hex(); }
default:
throw new IllegalStateException("internal lexer error");
}
}
}
} catch (Exception e) {
return -1;
}
}
private int parse_bin() throws ArithmeticException, IllegalArgumentException {
{
char yych = 0;
int yystate = 0;
yyl: while (true) {
switch (yystate) {
case 0:
yych = yyinput.charAt(yycursor);
yycursor += 1;
switch (yych) {
case 0x00:
yystate = 1;
continue yyl;
case 0x30:
case 0x31:
yystate = 3;
continue yyl;
default:
yystate = 2;
continue yyl;
}
case 1:
{ return number; }
case 2:
{ throw new IllegalArgumentException("ill-formed binary number"); }
case 3:
{ add_digit(2, 48); return parse_bin(); }
default:
throw new IllegalStateException("internal lexer error");
}
}
}
}
private int parse_oct() throws ArithmeticException, IllegalArgumentException {
{
char yych = 0;
int yystate = 0;
yyl: while (true) {
switch (yystate) {
case 0:
yych = yyinput.charAt(yycursor);
yycursor += 1;
switch (yych) {
case 0x00:
yystate = 1;
continue yyl;
case 0x30:
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x36:
case 0x37:
yystate = 3;
continue yyl;
default:
yystate = 2;
continue yyl;
}
case 1:
{ return number; }
case 2:
{ throw new IllegalArgumentException("ill-formed octal number"); }
case 3:
{ add_digit(8, 48); return parse_oct(); }
default:
throw new IllegalStateException("internal lexer error");
}
}
}
}
private int parse_dec() throws ArithmeticException, IllegalArgumentException {
{
char yych = 0;
int yystate = 0;
yyl: while (true) {
switch (yystate) {
case 0:
yych = yyinput.charAt(yycursor);
yycursor += 1;
switch (yych) {
case 0x00:
yystate = 1;
continue yyl;
case 0x30:
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x36:
case 0x37:
case 0x38:
case 0x39:
yystate = 3;
continue yyl;
default:
yystate = 2;
continue yyl;
}
case 1:
{ return number; }
case 2:
{ throw new IllegalArgumentException("ill-formed decimal number"); }
case 3:
{ add_digit(10, 48); return parse_dec(); }
default:
throw new IllegalStateException("internal lexer error");
}
}
}
}
private int parse_hex() throws ArithmeticException, IllegalArgumentException {
{
char yych = 0;
int yystate = 0;
yyl: while (true) {
switch (yystate) {
case 0:
yych = yyinput.charAt(yycursor);
yycursor += 1;
switch (yych) {
case 0x00:
yystate = 1;
continue yyl;
case 0x30:
case 0x31:
case 0x32:
case 0x33:
case 0x34:
case 0x35:
case 0x36:
case 0x37:
case 0x38:
case 0x39:
yystate = 3;
continue yyl;
case 0x41:
case 0x42:
case 0x43:
case 0x44:
case 0x45:
case 0x46:
yystate = 4;
continue yyl;
case 0x61:
case 0x62:
case 0x63:
case 0x64:
case 0x65:
case 0x66:
yystate = 5;
continue yyl;
default:
yystate = 2;
continue yyl;
}
case 1:
{ return number; }
case 2:
{ throw new IllegalArgumentException("ill-formed hexadecimal number"); }
case 3:
{ add_digit(16, 48); return parse_hex(); }
case 4:
{ add_digit(16, 55); return parse_hex(); }
case 5:
{ add_digit(16, 87); return parse_hex(); }
default:
throw new IllegalStateException("internal lexer error");
}
}
}
}
public static void main(String []args) {
Parser parser = new Parser();
assert parser.parse("1234567890\0") == 1234567890;
assert parser.parse("0b1101\0") == 0b1101;
assert parser.parse("0x007Fe\0") == 0x7fe;
assert parser.parse("0644\0") == 0644;
assert parser.parse("9999999999\0") == -1;
assert parser.parse("123??\0") == -1;
}
};
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