1 package net.mograsim.plugin.asm;
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3 import static java.lang.String.format;
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5 import java.util.regex.Pattern;
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7 public final class AsmNumberUtil
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10 private AsmNumberUtil()
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15 private static final String sgnPat = "[-+]?";
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16 private static final String binPat = "(?:[01]+_)*[01]+";
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17 private static final String octPat = "(?:[0-7]+_)*[0-7]+";
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18 private static final String decPat = "(?:[0-9]+_)*[0-9]+";
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19 private static final String hexPat = "(?:[0-9a-f]+_)*[0-9a-f]+";
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20 static final Pattern numberBin = Pattern.compile(format("%1$s0b%2$s|%1$s%2$sb", sgnPat, binPat), Pattern.CASE_INSENSITIVE);
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21 static final Pattern numberOct = Pattern.compile(format("%s%sq", sgnPat, octPat), Pattern.CASE_INSENSITIVE);
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22 static final Pattern numberDec = Pattern.compile(format("%s%s", sgnPat, decPat));
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23 static final Pattern numberHex = Pattern.compile(format("%1$s0x%2$s|%1$s%2$sh", sgnPat, hexPat), Pattern.CASE_INSENSITIVE);
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24 static final Pattern numberFloat = Pattern.compile(format("%1$s%2$s(?:\\.%2$s)?(?:e%1$s%2$s)?", sgnPat, decPat),
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25 Pattern.CASE_INSENSITIVE);
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27 public static boolean isBinary(CharSequence cs)
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29 return numberBin.matcher(cs).matches();
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32 public static boolean isOctal(CharSequence cs)
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34 return numberOct.matcher(cs).matches();
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37 public static boolean isDecimal(CharSequence cs)
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39 return numberDec.matcher(cs).matches();
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42 public static boolean isHexadecimal(CharSequence cs)
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44 return numberHex.matcher(cs).matches();
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47 public static boolean isFloatingPoint(CharSequence cs)
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49 return numberFloat.matcher(cs).matches();
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52 public static boolean isNumber(CharSequence cs)
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54 return getType(cs) != NumberType.NONE;
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57 public static boolean quickCheckForNumber(CharSequence cs)
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59 if (cs.length() == 0 || !isStart(cs.charAt(0)))
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61 return cs.length() == 1 || isPart(cs.charAt(1));
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64 public static boolean isStart(int c)
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66 return isDigit(c) || c == '+' || c == '-';
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69 public static boolean isDigit(int c)
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71 return ('0' <= c && c <= '9') || ('A' <= c && c <= 'F') || ('a' <= c && c <= 'f');
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74 public static boolean isPart(int c)
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76 return isDigit(c) || isMarker(Character.toLowerCase(c));
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79 public static boolean isMarker(int lowerCase)
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98 public static NumberType getType(CharSequence cs)
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100 if (!quickCheckForNumber(cs))
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101 return NumberType.NONE;
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103 return NumberType.DECIMAL;
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104 if (isHexadecimal(cs))
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105 return NumberType.HEXADECIMAL;
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107 return NumberType.BINARY;
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109 return NumberType.OCTAL;
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110 if (isFloatingPoint(cs))
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111 return NumberType.FLOATINGPOINT;
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112 return NumberType.NONE;
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115 public enum NumberType
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117 NONE, BINARY, OCTAL, DECIMAL, HEXADECIMAL, FLOATINGPOINT
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