Initial import

git-svn-id: svn://svn.code.sf.net/p/writer2latex/code/trunk@5 f0f2a975-2e09-46c8-9428-3b39399b9f3c

source/java/writer2latex/util/SimpleInputBuffer.java

@@ -0,0 +1,106 @@
+/************************************************************************
+ *
+ *  SimpleInputBuffer.java
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  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 library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *  Copyright: 2002-2007 by Henrik Just
+ *
+ *  All Rights Reserved.
+ * 
+ *  Version 1.0 (2007-11-22)
+ *
+ */
+
+package writer2latex.util;
+
+/** This class provides a simple string input buffer; it can be used as the
+ *  basis of a tokenizer.
+ */
+public class SimpleInputBuffer {
+    
+    private String sContent;
+    private int nIndex, nLen;
+    
+    /*private static boolean isEndOrLineEnd(char cChar) {
+        switch (cChar){
+            case '\0':
+            case '\n':
+            case '\r':
+                return true;
+            default:
+                return false;
+        }
+    }*/
+    
+    private static boolean isDigitOrDot(char cChar) {
+        return (cChar>='0' && cChar<='9') || cChar=='.';
+    }
+	
+    private static boolean isDigitOrDotOrComma(char cChar) {
+        return isDigitOrDot(cChar) || cChar==',';
+    }
+
+    public SimpleInputBuffer(String sContent) {
+        this.sContent=sContent;
+        nLen=sContent.length();
+        nIndex=0;
+    }
+    
+    public int getIndex() { return nIndex; }
+	
+    public boolean atEnd() {
+        return nIndex>=nLen;
+    }
+    
+    public char peekChar() {
+        return nIndex<nLen ? sContent.charAt(nIndex) : '\0';
+    }
+    
+    public char peekFollowingChar() {
+        return nIndex+1<nLen ? sContent.charAt(nIndex+1) : '\0';
+    }
+    
+    public char getChar() {
+        return nIndex<nLen ? sContent.charAt(nIndex++) : '\0';
+    }
+    
+    public String getIdentifier() {
+        int nStart=nIndex;
+        while (nIndex<nLen && (Character.isLetter(sContent.charAt(nIndex)) ||
+               isDigitOrDot(sContent.charAt(nIndex))))
+            nIndex++;
+        return sContent.substring(nStart,nIndex);
+    }
+    
+    public String getNumber() {
+        int nStart=nIndex;
+        while (nIndex<nLen && isDigitOrDotOrComma(sContent.charAt(nIndex)))
+            nIndex++;
+        return sContent.substring(nStart,nIndex);
+    }
+    
+    public String getInteger() {
+        int nStart=nIndex;
+        while (nIndex<nLen && sContent.charAt(nIndex)>='0' && sContent.charAt(nIndex)<='9'){
+            nIndex++;
+        }
+        return sContent.substring(nStart,nIndex);
+    }
+	
+    public void skipSpaces() {
+        while (nIndex<nLen && sContent.charAt(nIndex)==' ') { nIndex++; }
+    }
+}