5 public class JSRegexp extends JSCallable {
6 private boolean global;
10 public JSRegexp(Object arg0, Object arg1) throws JS.Exn {
11 if(arg0 instanceof JSRegexp) {
12 JSRegexp r = (JSRegexp) arg0;
13 this.global = r.global;
15 this.lastIndex = r.lastIndex;
17 String pattern = arg0.toString();
20 if(arg1 != null) sFlags = (String)arg1;
21 if(sFlags == null) sFlags = "";
22 for(int i=0;i<sFlags.length();i++) {
23 switch(sFlags.charAt(i)) {
24 case 'i': flags |= RE.REG_ICASE; break;
25 case 'm': flags |= RE.REG_MULTILINE; break;
26 case 'g': global = true; break;
27 default: throw new JS.Exn("Invalid flag in regexp \"" + sFlags.charAt(i) + "\"");
30 re = newRE(pattern,flags);
31 put("source",pattern);
32 put("global",wrapBool(global));
33 put("ignoreCase",wrapBool(flags & RE.REG_ICASE));
34 put("multiline",wrapBool(flags & RE.REG_MULTILINE));
38 public Object callMethod(Object method, Object a0, Object a1, Object a2, Object[] rest, int nargs) {
42 case "exec": return exec((String)a0);
43 case "test": return test((String)a0);
44 case "toString": return toString(a0);
49 return super.callMethod(method, a0, a1, a2, rest, nargs);
52 public Object get(Object key) {
54 case "exec": return METHOD;
55 case "test": return METHOD;
56 case "toString": return METHOD;
57 case "lastIndex": return new Integer(lastIndex);
59 return super.get(key);
62 public void put(Object key, Object value) {
63 if(key.equals("lastIndex")) lastIndex = JS.toNumber(value).intValue();
67 private Object exec(String s) throws JS.Exn {
68 int start = global ? lastIndex : 0;
69 if(start < 0 || start >= s.length()) {
74 REMatch match = re.getMatch(s,start);
76 lastIndex = match == null ? s.length() : match.getEndIndex();
80 return matchToExecResult(match,re,s);
83 private static Object matchToExecResult(REMatch match, RE re, String s) {
85 ret.put("index",new Integer(match.getStartIndex()));
87 int n = re.getNumSubs();
88 ret.put("length",new Integer(n+1));
89 ret.put("0",match.toString());
91 ret.put(Integer.toString(i),match.toString(i));
96 private Object exec(JSArray args) throws JS.Exn {
97 if(args.length() < 1) throw new JS.Exn("Not enough args to exec");
98 String s = args.elementAt(0).toString();
102 private Object test(String s) throws JS.Exn {
104 int start = global ? lastIndex : 0;
105 if(start < 0 || start >= s.length()) {
110 REMatch match = re.getMatch(s,start);
111 lastIndex = match != null ? s.length() : match.getEndIndex();
112 return wrapBool(match != null);
114 return wrapBool(re.getMatch(s) != null);
118 public String toString() {
119 StringBuffer sb = new StringBuffer();
121 sb.append(get("source"));
123 if(global) sb.append('g');
124 if(Boolean.TRUE.equals(get("ignoreCase"))) sb.append('i');
125 if(Boolean.TRUE.equals(get("multiline"))) sb.append('m');
126 return sb.toString();
129 public static Object stringMatch(Object o, JSArray args) throws JS.Exn {
130 if(args.length() < 1) throw new JS.Exn("not enough args to match");
131 Object arg0 = args.elementAt(0);
132 String s = o.toString();
134 JSRegexp regexp = null;
135 if(arg0 instanceof JSRegexp) {
136 regexp = (JSRegexp) arg0;
139 re = newRE(arg0.toString(),0);
143 REMatch match = re.getMatch(s);
144 return matchToExecResult(match,re,s);
147 return regexp.exec(s);
149 JSArray ret = new JSArray();
150 REMatch[] matches = re.getAllMatches(s);
151 for(int i=0;i<matches.length;i++)
152 ret.addElement(matches[i].toString());
153 if(matches.length > 0)
154 regexp.lastIndex = matches[matches.length-1].getEndIndex();
156 regexp.lastIndex = s.length();
160 public static Object stringSearch(Object o, JSArray args) throws JS.Exn {
161 if(args.length() < 1) throw new JS.Exn("not enough args to match");
162 Object arg0 = args.elementAt(0);
163 String s = o.toString();
165 if(arg0 instanceof JSRegexp)
166 re = ((JSRegexp)arg0).re;
168 re = newRE(arg0.toString(),0);
169 REMatch match = re.getMatch(s);
170 if(match == null) return new Integer(-1);
171 return new Integer(match.getStartIndex());
174 public static Object stringReplace(Object o, JSArray args) throws JS.Exn {
175 if(args.length() < 2) throw new JS.Exn("not enough args to replace");
176 Object arg0 = args.elementAt(0);
177 Object arg1 = args.elementAt(1);
178 String s = o.toString();
180 JSCallable replaceFunc = null;
181 String replaceString = null;
182 JSRegexp regexp = null;
183 if(arg0 instanceof JSRegexp) {
184 regexp = (JSRegexp) arg0;
187 re = newRE(arg0.toString(),0);
189 if(arg1 instanceof JSCallable)
190 replaceFunc = (JSCallable) arg1;
192 replaceString = arg1.toString();
194 if(regexp != null && regexp.global) {
195 matches = re.getAllMatches(s);
197 if(matches.length > 0)
198 regexp.lastIndex = matches[matches.length-1].getEndIndex();
200 regexp.lastIndex = s.length();
203 REMatch match = re.getMatch(s);
205 matches = new REMatch[]{ match };
207 matches = new REMatch[0];
210 StringBuffer sb = new StringBuffer(s.length());
212 char[] sa = s.toCharArray();
213 for(int i=0;i<matches.length;i++) {
214 REMatch match = matches[i];
215 sb.append(sa,pos,match.getStartIndex()-pos);
216 pos = match.getEndIndex();
217 if(replaceFunc != null) {
218 // FEATURE: reintroduce
219 throw new JS.Exn("stringReplace() with a replacement function is temporarily disabled");
221 JSArray a = new JSArray();
222 a.addElement(match.toString());
224 int n = re.getNumSubs();
225 for(int j=1;j<=n;j++)
226 a.addElement(match.toString(j));
228 a.addElement(new Integer(match.getStartIndex()));
230 Object ret = replaceFunc.call(a, null);
231 sb.append(ret.toString());
234 sb.append(mySubstitute(match,replaceString,s));
237 int end = matches.length == 0 ? 0 : matches[matches.length-1].getEndIndex();
238 sb.append(sa,end,sa.length-end);
239 return sb.toString();
242 private static String mySubstitute(REMatch match, String s, String source) {
243 StringBuffer sb = new StringBuffer();
246 for(i=0;i<s.length()-1;i++) {
255 case '0': case '1': case '2': case '3': case '4':
256 case '5': case '6': case '7': case '8': case '9':
257 if(i < s.length()-1 && (c2 = s.charAt(i+1)) >= '0' && c2 <= '9') {
258 n = (c - '0') * 10 + (c2 - '0');
264 sb.append(match.toString(n));
267 sb.append('$'); break;
269 sb.append(match.toString()); break;
271 sb.append(source.substring(0,match.getStartIndex())); break;
273 sb.append(source.substring(match.getEndIndex())); break;
279 if(i < s.length()) sb.append(s.charAt(i));
280 return sb.toString();
284 public static Object stringSplit(Object o,JSArray args) {
285 String s = o.toString();
286 if(args.length() < 1 || args.elementAt(0) == null || s.length() == 0) {
287 JSArray ret = new JSArray();
291 Object arg0 = args.elementAt(0);
293 int limit = args.length() < 2 ? Integer.MAX_VALUE : JS.toInt(args.elementAt(1));
294 if(limit < 0) limit = Integer.MAX_VALUE;
295 if(limit == 0) return new JSArray();
298 JSRegexp regexp = null;
300 JSArray ret = new JSArray();
303 if(arg0 instanceof JSRegexp) {
304 regexp = (JSRegexp) arg0;
307 sep = arg0.toString();
310 // special case this for speed. additionally, the code below doesn't properly handle
311 // zero length strings
312 if(sep != null && sep.length()==0) {
313 int len = s.length();
314 for(int i=0;i<len;i++)
315 ret.addElement(s.substring(i,i+1));
319 OUTER: while(p < s.length()) {
321 REMatch m = re.getMatch(s,p);
322 if(m == null) break OUTER;
323 boolean zeroLength = m.getStartIndex() == m.getEndIndex();
324 ret.addElement(s.substring(p,zeroLength ? m.getStartIndex()+1 : m.getStartIndex()));
325 p = zeroLength ? p + 1 : m.getEndIndex();
327 for(int i=1;i<=re.getNumSubs();i++) {
328 ret.addElement(m.toString(i));
329 if(ret.length() == limit) break OUTER;
333 int x = s.indexOf(sep,p);
334 if(x == -1) break OUTER;
335 ret.addElement(s.substring(p,x));
336 p = x + sep.length();
338 if(ret.length() == limit) break;
340 if(p < s.length() && ret.length() != limit)
341 ret.addElement(s.substring(p));
345 public static RE newRE(String pattern, int flags) throws JS.Exn {
347 return new RE(pattern,flags,RESyntax.RE_SYNTAX_PERL5);
348 } catch(REException e) {
349 throw new JS.Exn(e.toString());
353 private static Boolean wrapBool(boolean b) {
354 return b ? Boolean.TRUE : Boolean.FALSE;
357 private static Boolean wrapBool(int n) {
358 return wrapBool(n != 0);
361 public String typeName() { return "regexp"; }