File	Doc	Category	Size	Date	Package
REDebugCompiler.java	API Doc	Java SE 5 API	8579	Fri Aug 26 14:55:28 BST 2005	com.sun.org.apache.regexp.internal

REDebugCompiler

• java.lang.Object
  • RECompiler

Fields Summary
static Hashtable	hashOpcode Mapping from opcodes to descriptive strings

Constructors Summary

Methods Summary
java.lang.String	charToString(char c) Return a string describing a (possibly unprintable) character. param c Character to convert to a printable representation return String representation of character // If it's unprintable, convert to '\###' if (c < ' " || c > 127) { return "\\" + (int)c; } // Return the character as a string return String.valueOf(c);
public void	dumpProgram(java.io.PrintWriter p) Dumps the current program to a PrintWriter param p PrintWriter for program dump output // Loop through the whole program for (int i = 0; i < lenInstruction; ) { // Get opcode, opdata and next fields of current program node char opcode = instruction[i + RE.offsetOpcode]; char opdata = instruction[i + RE.offsetOpdata]; short next = (short)instruction[i + RE.offsetNext]; // Display the current program node p.print(i + ". " + nodeToString(i) + ", next = "); // If there's no next, say 'none', otherwise give absolute index of next node if (next == 0) { p.print("none"); } else { p.print(i + next); } // Move past node i += RE.nodeSize; // If character class if (opcode == RE.OP_ANYOF) { // Opening bracket for start of char class p.print(", ["); // Show each range in the char class int rangeCount = opdata; for (int r = 0; r < rangeCount; r++) { // Get first and last chars in range char charFirst = instruction[i++]; char charLast = instruction[i++]; // Print range as X-Y, unless range encompasses only one char if (charFirst == charLast) { p.print(charToString(charFirst)); } else { p.print(charToString(charFirst) + "-" + charToString(charLast)); } } // Annotate the end of the char class p.print("]"); } // If atom if (opcode == RE.OP_ATOM) { // Open quote p.print(", \""); // Print each character in the atom for (int len = opdata; len-- != 0; ) { p.print(charToString(instruction[i++])); } // Close quote p.print("\""); } // Print a newline p.println(""); }
java.lang.String	nodeToString(int node) Returns a descriptive string for a node in a regular expression program. param node Node to describe return Description of node // Get opcode and opdata for node char opcode = instruction[node + RE.offsetOpcode]; int opdata = (int)instruction[node + RE.offsetOpdata]; // Return opcode as a string and opdata value return opcodeToString(opcode) + ", opdata = " + opdata;
java.lang.String	opcodeToString(char opcode) Returns a descriptive string for an opcode. param opcode Opcode to convert to a string return Description of opcode hashOpcode.put(new Integer(RE.OP_RELUCTANTSTAR), "OP_RELUCTANTSTAR"); hashOpcode.put(new Integer(RE.OP_RELUCTANTPLUS), "OP_RELUCTANTPLUS"); hashOpcode.put(new Integer(RE.OP_RELUCTANTMAYBE), "OP_RELUCTANTMAYBE"); hashOpcode.put(new Integer(RE.OP_END), "OP_END"); hashOpcode.put(new Integer(RE.OP_BOL), "OP_BOL"); hashOpcode.put(new Integer(RE.OP_EOL), "OP_EOL"); hashOpcode.put(new Integer(RE.OP_ANY), "OP_ANY"); hashOpcode.put(new Integer(RE.OP_ANYOF), "OP_ANYOF"); hashOpcode.put(new Integer(RE.OP_BRANCH), "OP_BRANCH"); hashOpcode.put(new Integer(RE.OP_ATOM), "OP_ATOM"); hashOpcode.put(new Integer(RE.OP_STAR), "OP_STAR"); hashOpcode.put(new Integer(RE.OP_PLUS), "OP_PLUS"); hashOpcode.put(new Integer(RE.OP_MAYBE), "OP_MAYBE"); hashOpcode.put(new Integer(RE.OP_NOTHING), "OP_NOTHING"); hashOpcode.put(new Integer(RE.OP_GOTO), "OP_GOTO"); hashOpcode.put(new Integer(RE.OP_ESCAPE), "OP_ESCAPE"); hashOpcode.put(new Integer(RE.OP_OPEN), "OP_OPEN"); hashOpcode.put(new Integer(RE.OP_CLOSE), "OP_CLOSE"); hashOpcode.put(new Integer(RE.OP_BACKREF), "OP_BACKREF"); hashOpcode.put(new Integer(RE.OP_POSIXCLASS), "OP_POSIXCLASS"); // Get string for opcode String ret =(String)hashOpcode.get(new Integer(opcode)); // Just in case we have a corrupt program if (ret == null) { ret = "OP_????"; } return ret;