1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
package bjc.utils.parserutils;
import java.util.regex.Pattern;
import static bjc.utils.PropertyDB.*;
/*
* Checks if a string would pass Double.parseDouble.
*
* Uses a regex from the javadoc for Double.valueOf()
*/
class DoubleMatcher {
/*
* Unit pieces.
*/
private static final String DecDigits = getRegex("fpDigits");
private static final String HexDigits = getRegex("fpHexDigits");
private static final String Exponent = applyFormat("fpExponent", getRegex("fpExponent"), DecDigits);
/*
* Decimal floating point numbers.
*/
private static final String SIMPLE_DEC = applyFormat("fpDecimalDecimal", DecDigits, Exponent);
private static final String SIMPLE_INTDEC = applyFormat("fpDecimalInteger", DecDigits, Exponent);
/*
* Hex floating point numbers.
*/
private static final String HEX_INT = applyFormat("fpHexInteger", HexDigits);
private static final String HEX_DEC = applyFormat("fpHexDecimal", HexDigits);
private static final String HEX_LEAD = applyFormat("fpHexLeader", HEX_INT, HEX_DEC);
private static final String HEX_STRING = applyFormat("fpHexString", HEX_LEAD, DecDigits);
/*
* Floating point components.
*/
private static final String FP_LEADER = getRegex("fpLeader");
private static final String FP_NUM = applyFormat("fpNumber", SIMPLE_INTDEC, SIMPLE_DEC,
HEX_STRING);
private static final String fpRegex = applyFormat("fpDouble", FP_LEADER, FP_NUM);
public static final Pattern floatingLiteral = Pattern.compile("\\A" + fpRegex + "\\Z");
}
|
