-package org.xwt.js;
-
-import gnu.regexp.*;
-
-public class Regexp extends JS.Obj {
- private boolean global;
- private RE re;
- private int lastIndex;
-
- public Regexp(Object arg0, Object arg1) throws JS.Exn {
- if(arg0 instanceof Regexp) {
- Regexp r = (Regexp) arg0;
- this.global = r.global;
- this.re = r.re;
- this.lastIndex = r.lastIndex;
- } else {
- String pattern = arg0.toString();
- String sFlags = null;
- int flags = 0;
- if(arg1 != null) sFlags = (String)arg1;
- if(sFlags == null) sFlags = "";
- for(int i=0;i<sFlags.length();i++) {
- switch(sFlags.charAt(i)) {
- case 'i': flags |= RE.REG_ICASE; break;
- case 'm': flags |= RE.REG_MULTILINE; break;
- case 'g': global = true; break;
- default: throw new JS.Exn("Invalid flag in regexp \"" + sFlags.charAt(i) + "\"");
- }
- }
- re = newRE(pattern,flags);
- _put("source",pattern);
- _put("global",wrapBool(global));
- _put("ignoreCase",wrapBool(flags & RE.REG_ICASE));
- _put("multiline",wrapBool(flags & RE.REG_MULTILINE));
- }
- }
-
- public Object callMethod(Object method, Array args, boolean checkOnly) throws JS.Exn {
- if (method.equals("exec")) {
- if (checkOnly) return Boolean.TRUE;
- return exec(args);
- } else if (method.equals("test")) {
- if (checkOnly) return Boolean.TRUE;
- return test(args);
- } else if (method.equals("toString")) {
- if (checkOnly) return Boolean.TRUE;
- return toString();
- }
- if (checkOnly) return Boolean.FALSE;
- return null;
- }
-
- // gcj bug...
- public Object get(Object key) { return _get(key); }
- public Object put(Object key,Object value) { _put(key,value); return null; }
-
- public Object _get(Object key) {
- if(key.equals("lastIndex")) return new Integer(lastIndex);
- return super.get(key);
- }
-
- public void _put(Object key, Object value) {
- if(key.equals("lastIndex")) lastIndex = JS.toNumber(value).intValue();
- super.put(key,value);
- }
-
- private Object exec(String s) throws JS.Exn {
- int start = global ? lastIndex : 0;
- if(start < 0 || start >= s.length()) {
- lastIndex = 0;
- return null;
- }
-
- REMatch match = re.getMatch(s,start);
- if(global)
- lastIndex = match == null ? s.length() : match.getEndIndex();
- if(match == null)
- return null;
- else
- return matchToExecResult(match,re,s);
- }
-
- private static Object matchToExecResult(REMatch match, RE re, String s) {
- JS.Obj ret = new JS.Obj();
- ret.put("index",new Integer(match.getStartIndex()));
- ret.put("input",s);
- int n = re.getNumSubs();
- ret.put("length",new Integer(n+1));
- ret.put("0",match.toString());
- for(int i=1;i<=n;i++)
- ret.put(Integer.toString(i),match.toString(i));
- return ret;
- }
-
-
- private Object exec(JS.Array args) throws JS.Exn {
- if(args.length() < 1) throw new JS.Exn("Not enough args to exec");
- String s = args.elementAt(0).toString();
- return exec(s);
- }
-
- private Object test(JS.Array args) throws JS.Exn {
- if(args.length() < 1) throw new JS.Exn("Not enough args to match");
- String s = args.elementAt(0).toString();
-
- if(global) {
- int start = global ? lastIndex : 0;
- if(start < 0 || start >= s.length()) {
- lastIndex = 0;
- return null;
- }
-
- REMatch match = re.getMatch(s,start);
- lastIndex = match != null ? s.length() : match.getEndIndex();
- return wrapBool(match != null);
- } else {
- return wrapBool(re.getMatch(s) != null);
- }
- }
-
- public String toString() {
- StringBuffer sb = new StringBuffer();
- sb.append('/');
- sb.append(_get("source"));
- sb.append('/');
- if(global) sb.append('g');
- if(Boolean.TRUE.equals(_get("ignoreCase"))) sb.append('i');
- if(Boolean.TRUE.equals(_get("multiline"))) sb.append('m');
- return sb.toString();
- }
-
- public static Object stringMatch(Object o, JS.Array args) throws JS.Exn {
- if(args.length() < 1) throw new JS.Exn("not enough args to match");
- Object arg0 = args.elementAt(0);
- String s = o.toString();
- RE re;
- Regexp regexp = null;
- if(arg0 instanceof Regexp) {
- regexp = (Regexp) arg0;
- re = regexp.re;
- } else {
- re = newRE(arg0.toString(),0);
- }
-
- if(regexp == null) {
- REMatch match = re.getMatch(s);
- return matchToExecResult(match,re,s);
- }
- if(!regexp.global)
- return regexp.exec(s);
-
- JS.Array ret = new JS.Array();
- REMatch[] matches = re.getAllMatches(s);
- for(int i=0;i<matches.length;i++)
- ret.addElement(matches[i].toString());
- if(matches.length > 0)
- regexp.lastIndex = matches[matches.length-1].getEndIndex();
- else
- regexp.lastIndex = s.length();
- return ret;
- }
-
- public static Object stringSearch(Object o, JS.Array args) throws JS.Exn {
- if(args.length() < 1) throw new JS.Exn("not enough args to match");
- Object arg0 = args.elementAt(0);
- String s = o.toString();
- RE re;
- if(arg0 instanceof Regexp)
- re = ((Regexp)arg0).re;
- else
- re = newRE(arg0.toString(),0);
- REMatch match = re.getMatch(s);
- if(match == null) return new Integer(-1);
- return new Integer(match.getStartIndex());
- }
-
- public static Object stringReplace(Object o, JS.Array args) throws JS.Exn {
- if(args.length() < 2) throw new JS.Exn("not enough args to replace");
- Object arg0 = args.elementAt(0);
- Object arg1 = args.elementAt(1);
- String s = o.toString();
- RE re;
- JS.Callable replaceFunc = null;
- String replaceString = null;
- Regexp regexp = null;
- if(arg0 instanceof Regexp) {
- regexp = (Regexp) arg0;
- re = regexp.re;
- } else {
- re = newRE(arg0.toString(),0);
- }
- if(arg1 instanceof JS.Callable)
- replaceFunc = (JS.Callable) arg1;
- else
- replaceString = arg1.toString();
- REMatch[] matches;
- if(regexp != null && regexp.global) {
- matches = re.getAllMatches(s);
- if(regexp != null) {
- if(matches.length > 0)
- regexp.lastIndex = matches[matches.length-1].getEndIndex();
- else
- regexp.lastIndex = s.length();
- }
- } else {
- REMatch match = re.getMatch(s);
- if(match != null)
- matches = new REMatch[]{ match };
- else
- matches = new REMatch[0];
- }
-
- StringBuffer sb = new StringBuffer(s.length());
- int pos = 0;
- char[] sa = s.toCharArray();
- for(int i=0;i<matches.length;i++) {
- REMatch match = matches[i];
- sb.append(sa,pos,match.getStartIndex()-pos);
- pos = match.getEndIndex();
- if(replaceFunc != null) {
- JS.Array a = new JS.Array();
- a.addElement(match.toString());
- if(regexp != null) {
- int n = re.getNumSubs();
- for(int j=1;j<=n;j++)
- a.addElement(match.toString(j));
- }
- a.addElement(new Integer(match.getStartIndex()));
- a.addElement(s);
- Object ret = replaceFunc.call(a);
- sb.append(ret.toString());
- } else {
- sb.append(mySubstitute(match,replaceString,s));
- }
- }
- int end = matches.length == 0 ? 0 : matches[matches.length-1].getEndIndex();
- sb.append(sa,end,sa.length-end);
- return sb.toString();
- }
-
- private static String mySubstitute(REMatch match, String s, String source) {
- StringBuffer sb = new StringBuffer();
- int i,n;
- char c,c2;
- for(i=0;i<s.length()-1;i++) {
- c = s.charAt(i);
- if(c != '$') {
- sb.append(c);
- continue;
- }
- i++;
- c = s.charAt(i);
- switch(c) {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- if(i < s.length()-1 && (c2 = s.charAt(i+1)) >= '0' && c2 <= '9') {
- n = (c - '0') * 10 + (c2 - '0');
- i++;
- } else {
- n = c - '0';
- }
- if(n > 0)
- sb.append(match.toString(n));
- break;
- case '$':
- sb.append('$'); break;
- case '&':
- sb.append(match.toString()); break;
- case '`':
- sb.append(source.substring(0,match.getStartIndex())); break;
- case '\'':
- sb.append(source.substring(match.getEndIndex())); break;
- default:
- sb.append('$');
- sb.append(c);
- }
- }
- if(i < s.length()) sb.append(s.charAt(i));
- return sb.toString();
- }
-
-
- public static Object stringSplit(Object o,JS.Array args) {
- String s = o.toString();
- if(args.length() < 1 || args.elementAt(0) == null || s.length() == 0) {
- JS.Array ret = new JS.Array();
- ret.addElement(s);
- return ret;
- }
- Object arg0 = args.elementAt(0);
-
- int limit = args.length() < 2 ? Integer.MAX_VALUE : JS.toInt(args.elementAt(1));
- if(limit < 0) limit = Integer.MAX_VALUE;
- if(limit == 0) return new JS.Array();
-
- RE re = null;
- Regexp regexp = null;
- String sep = null;
- JS.Array ret = new JS.Array();
- int p = 0;
-
- if(arg0 instanceof Regexp) {
- regexp = (Regexp) arg0;
- re = regexp.re;
- } else {
- sep = arg0.toString();
- }
-
- // special case this for speed. additionally, the code below doesn't properly handle
- // zero length strings
- if(sep != null && sep.length()==0) {
- int len = s.length();
- for(int i=0;i<len;i++)
- ret.addElement(s.substring(i,i+1));
- return ret;
- }
-
- OUTER: while(p < s.length()) {
- if(re != null) {
- REMatch m = re.getMatch(s,p);
- if(m == null) break OUTER;
- boolean zeroLength = m.getStartIndex() == m.getEndIndex();
- ret.addElement(s.substring(p,zeroLength ? m.getStartIndex()+1 : m.getStartIndex()));
- p = zeroLength ? p + 1 : m.getEndIndex();
- if(!zeroLength) {
- for(int i=1;i<=re.getNumSubs();i++) {
- ret.addElement(m.toString(i));
- if(ret.length() == limit) break OUTER;
- }
- }
- } else {
- int x = s.indexOf(sep,p);
- if(x == -1) break OUTER;
- ret.addElement(s.substring(p,x));
- p = x + sep.length();
- }
- if(ret.length() == limit) break;
- }
- if(p < s.length() && ret.length() != limit)
- ret.addElement(s.substring(p));
- return ret;
- }
-
- public static RE newRE(String pattern, int flags) throws JS.Exn {
- try {
- return new RE(pattern,flags,RESyntax.RE_SYNTAX_PERL5);
- } catch(REException e) {
- throw new JS.Exn(e.toString());
- }
- }
-
- private static Boolean wrapBool(boolean b) {
- return b ? Boolean.TRUE : Boolean.FALSE;
- }
-
- private static Boolean wrapBool(int n) {
- return wrapBool(n != 0);
- }
-
- public String typeName() { return "regexp"; }
-}