2003/06/28 06:54:18

[org.ibex.core.git] / src / gnu / regexp / RETokenPOSIX.java

diff --git a/src/gnu/regexp/RETokenPOSIX.java b/src/gnu/regexp/RETokenPOSIX.java
new file mode 100644 (file)
index 0000000..c1a0e7e
--- /dev/null
+++ b/src/gnu/regexp/RETokenPOSIX.java
@@ -0,0 +1,125 @@
+/*
+ *  gnu/regexp/RETokenPOSIX.java
+ *  Copyright (C) 1998-2001 Wes Biggs
+ *
+ *  This library is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published
+ *  by the Free Software Foundation; either version 2.1 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+package gnu.regexp;
+
+final class RETokenPOSIX extends REToken {
+  int type;
+  boolean insens;
+  boolean negated;
+
+  static final int  ALNUM = 0;
+  static final int  ALPHA = 1;
+  static final int  BLANK = 2;
+  static final int  CNTRL = 3;
+  static final int  DIGIT = 4;
+  static final int  GRAPH = 5;
+  static final int  LOWER = 6;
+  static final int  PRINT = 7;
+  static final int  PUNCT = 8;
+  static final int  SPACE = 9;
+  static final int  UPPER = 10;
+  static final int XDIGIT = 11;
+
+  // Array indices correspond to constants defined above.
+  static final String[] s_nameTable =  {
+    "alnum", "alpha", "blank", "cntrl", "digit", "graph", "lower",
+    "print", "punct", "space", "upper", "xdigit" 
+  };
+
+  // The RE constructor uses this to look up the constant for a string
+  static int intValue(String key) {
+    for (int i = 0; i < s_nameTable.length; i++) {
+      if (s_nameTable[i].equals(key)) return i;
+    }
+    return -1;
+  }
+
+  RETokenPOSIX(int subIndex, int type, boolean insens, boolean negated) {
+    super(subIndex);
+    this.type = type;
+    this.insens = insens;
+    this.negated = negated;
+  }
+
+    int getMinimumLength() {
+       return 1;
+    }
+
+    boolean match(CharIndexed input, REMatch mymatch) {
+    char ch = input.charAt(mymatch.index);
+    if (ch == CharIndexed.OUT_OF_BOUNDS)
+      return false;
+    
+    boolean retval = false;
+    switch (type) {
+    case ALNUM:
+       // Note that there is some debate over whether '_' should be included
+       retval = Character.isLetterOrDigit(ch) || (ch == '_');
+       break;
+    case ALPHA:
+       retval = Character.isLetter(ch);
+       break;
+    case BLANK:
+       retval = ((ch == ' ') || (ch == '\t'));
+       break;
+    case CNTRL:
+       retval = Character.isISOControl(ch);
+       break;
+    case DIGIT:
+       retval = Character.isDigit(ch);
+       break;
+    case GRAPH:
+       retval = (!(Character.isWhitespace(ch) || Character.isISOControl(ch)));
+       break;
+    case LOWER:
+       retval = ((insens && Character.isLetter(ch)) || Character.isLowerCase(ch));
+       break;
+    case PRINT:
+       retval = (!(Character.isWhitespace(ch) || Character.isISOControl(ch)))
+           || (ch == ' ');
+       break;
+    case PUNCT:
+       // This feels sloppy, especially for non-U.S. locales.
+       retval = ("`~!@#$%^&*()-_=+[]{}\\|;:'\"/?,.<>".indexOf(ch)!=-1);
+       break;
+    case SPACE:
+       retval = Character.isWhitespace(ch);
+       break;
+    case UPPER:
+       retval = ((insens && Character.isLetter(ch)) || Character.isUpperCase(ch));
+       break;
+    case XDIGIT:
+       retval = (Character.isDigit(ch) || ("abcdefABCDEF".indexOf(ch)!=-1));
+       break;
+    }
+
+    if (negated) retval = !retval;
+    if (retval) {
+       ++mymatch.index;
+       return next(input, mymatch);
+    }
+    else return false;
+  }
+
+  void dump(StringBuffer os) {
+    if (negated) os.append('^');
+    os.append("[:" + s_nameTable[type] + ":]");
+  }
+}