1 package net.mograsim.plugin.asm.editor;
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3 import org.eclipse.core.runtime.Assert;
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4 import org.eclipse.jface.text.rules.ICharacterScanner;
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5 import org.eclipse.jface.text.rules.IRule;
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6 import org.eclipse.jface.text.rules.IToken;
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7 import org.eclipse.jface.text.rules.Token;
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9 import net.mograsim.plugin.asm.AsmNumberUtil;
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11 public class AsmNumberRule implements IRule
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14 /** The token to be returned when this rule is successful */
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15 protected IToken fToken;
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18 * Creates a rule which will return the specified token when a numerical sequence is detected.
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20 * @param token the token to be returned
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22 public AsmNumberRule(IToken token)
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24 Assert.isNotNull(token);
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29 public IToken evaluate(ICharacterScanner scanner)
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32 int c = scanner.read();
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33 if (!AsmNumberUtil.isStart(c))
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34 return abort(scanner, i);
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35 StringBuilder sb = new StringBuilder();
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36 sb.appendCodePoint(c);
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41 if (AsmNumberUtil.isPart(c))
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42 sb.appendCodePoint(c);
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46 if (!AsmNumberUtil.isNumber(sb))
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47 return abort(scanner, i);
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52 private static IToken abort(ICharacterScanner scanner, int i)
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54 for (int j = 0; j < i; j++)
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56 return Token.UNDEFINED;
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