Completely changed the structure and switched to Eclipse Plugin.

[Mograsim.git] / net.mograsim.plugin.core / src / net / mograsim / plugin / asm / AsmNumberUtil.java

diff --git a/net.mograsim.plugin.core/src/net/mograsim/plugin/asm/AsmNumberUtil.java b/net.mograsim.plugin.core/src/net/mograsim/plugin/asm/AsmNumberUtil.java
new file mode 100644 (file)
index 0000000..8a9f8a3
--- /dev/null
+++ b/net.mograsim.plugin.core/src/net/mograsim/plugin/asm/AsmNumberUtil.java
@@ -0,0 +1,119 @@
+package net.mograsim.plugin.asm;
+
+import static java.lang.String.format;
+
+import java.util.regex.Pattern;
+
+public final class AsmNumberUtil
+{
+
+       private AsmNumberUtil()
+       {
+
+       }
+
+       private static final String sgnPat = "[-+]?";
+       private static final String binPat = "(?:[01]+_)*[01]+";
+       private static final String octPat = "(?:[0-7]+_)*[0-7]+";
+       private static final String decPat = "(?:[0-9]+_)*[0-9]+";
+       private static final String hexPat = "(?:[0-9a-f]+_)*[0-9a-f]+";
+       static final Pattern numberBin = Pattern.compile(format("%1$s0b%2$s|%1$s%2$sb", sgnPat, binPat), Pattern.CASE_INSENSITIVE);
+       static final Pattern numberOct = Pattern.compile(format("%s%sq", sgnPat, octPat), Pattern.CASE_INSENSITIVE);
+       static final Pattern numberDec = Pattern.compile(format("%s%s", sgnPat, decPat));
+       static final Pattern numberHex = Pattern.compile(format("%1$s0x%2$s|%1$s%2$sh", sgnPat, hexPat), Pattern.CASE_INSENSITIVE);
+       static final Pattern numberFloat = Pattern.compile(format("%1$s%2$s(?:\\.%2$s)?(?:e%1$s%2$s)?", sgnPat, decPat),
+                       Pattern.CASE_INSENSITIVE);
+
+       public static boolean isBinary(CharSequence cs)
+       {
+               return numberBin.matcher(cs).matches();
+       }
+
+       public static boolean isOctal(CharSequence cs)
+       {
+               return numberOct.matcher(cs).matches();
+       }
+
+       public static boolean isDecimal(CharSequence cs)
+       {
+               return numberDec.matcher(cs).matches();
+       }
+
+       public static boolean isHexadecimal(CharSequence cs)
+       {
+               return numberHex.matcher(cs).matches();
+       }
+
+       public static boolean isFloatingPoint(CharSequence cs)
+       {
+               return numberFloat.matcher(cs).matches();
+       }
+
+       public static boolean isNumber(CharSequence cs)
+       {
+               return getType(cs) != NumberType.NONE;
+       }
+
+       public static boolean quickCheckForNumber(CharSequence cs)
+       {
+               if (cs.length() == 0 || !isStart(cs.charAt(0)))
+                       return false;
+               return cs.length() == 1 || isPart(cs.charAt(1));
+       }
+
+       public static boolean isStart(int c)
+       {
+               return isDigit(c) || c == '+' || c == '-';
+       }
+
+       public static boolean isDigit(int c)
+       {
+               return ('0' <= c && c <= '9') || ('A' <= c && c <= 'F') || ('a' <= c && c <= 'f');
+       }
+
+       public static boolean isPart(int c)
+       {
+               return isDigit(c) || isMarker(Character.toLowerCase(c));
+       }
+
+       public static boolean isMarker(int lowerCase)
+       {
+               switch (lowerCase)
+               {
+               case '.':
+               case '_':
+               case '+':
+               case '-':
+               case 'e':
+               case 'x':
+               case 'b':
+               case 'q':
+               case 'h':
+                       return true;
+               default:
+                       return false;
+               }
+       }
+
+       public static NumberType getType(CharSequence cs)
+       {
+               if (!quickCheckForNumber(cs))
+                       return NumberType.NONE;
+               if (isDecimal(cs))
+                       return NumberType.DECIMAL;
+               if (isHexadecimal(cs))
+                       return NumberType.HEXADECIMAL;
+               if (isBinary(cs))
+                       return NumberType.BINARY;
+               if (isOctal(cs))
+                       return NumberType.OCTAL;
+               if (isFloatingPoint(cs))
+                       return NumberType.FLOATINGPOINT;
+               return NumberType.NONE;
+       }
+
+       public enum NumberType
+       {
+               NONE, BINARY, OCTAL, DECIMAL, HEXADECIMAL, FLOATINGPOINT
+       }
+}