205 // (3)getClass().getClassLoader0() is expensive
206 // (4)There might be a timing gap in isTrusted setting. getClassLoader0()
207 // is only chcked (and then isTrusted gets set) when (SM==null). It is
208 // possible that the SM==null for now but then SM is NOT null later
209 // when safeTrim() is invoked...the "safe" way to do is to redundant
210 // check (... && (isTrusted || SM == null || getClassLoader0())) in trim
211 // but it then can be argued that the SM is null when the opertaion
212 // is started...
213 CharsetDecoder cd = cs.newDecoder();
214 int en = scale(len, cd.maxCharsPerByte());
215 char[] ca = new char[en];
216 if (len == 0)
217 return ca;
218 boolean isTrusted = false;
219 if (System.getSecurityManager() != null) {
220 if (!(isTrusted = (cs.getClass().getClassLoader0() == null))) {
221 ba = Arrays.copyOfRange(ba, off, off + len);
222 off = 0;
223 }
224 }
225 if (cd instanceof ArrayDecoder) {
226 int clen = ((ArrayDecoder)cd).decode(ba, off, len, ca);
227 return safeTrim(ca, clen, cs, isTrusted);
228 } else {
229 cd.onMalformedInput(CodingErrorAction.REPLACE)
230 .onUnmappableCharacter(CodingErrorAction.REPLACE)
231 .reset();
232 ByteBuffer bb = ByteBuffer.wrap(ba, off, len);
233 CharBuffer cb = CharBuffer.wrap(ca);
234 try {
235 CoderResult cr = cd.decode(bb, cb, true);
236 if (!cr.isUnderflow())
237 cr.throwException();
238 cr = cd.flush(cb);
239 if (!cr.isUnderflow())
240 cr.throwException();
241 } catch (CharacterCodingException x) {
242 // Substitution is always enabled,
243 // so this shouldn't happen
244 throw new Error(x);
245 }
246 return safeTrim(ca, cb.position(), cs, isTrusted);
247 }
248 }
249
250 static char[] decode(byte[] ba, int off, int len) {
251 String csn = Charset.defaultCharset().name();
339 if (se == null)
340 throw new UnsupportedEncodingException (csn);
341 set(encoder, se);
342 }
343 return se.encode(ca, off, len);
344 }
345
346 static byte[] encode(Charset cs, char[] ca, int off, int len) {
347 CharsetEncoder ce = cs.newEncoder();
348 int en = scale(len, ce.maxBytesPerChar());
349 byte[] ba = new byte[en];
350 if (len == 0)
351 return ba;
352 boolean isTrusted = false;
353 if (System.getSecurityManager() != null) {
354 if (!(isTrusted = (cs.getClass().getClassLoader0() == null))) {
355 ca = Arrays.copyOfRange(ca, off, off + len);
356 off = 0;
357 }
358 }
359 if (ce instanceof ArrayEncoder) {
360 int blen = ((ArrayEncoder)ce).encode(ca, off, len, ba);
361 return safeTrim(ba, blen, cs, isTrusted);
362 } else {
363 ce.onMalformedInput(CodingErrorAction.REPLACE)
364 .onUnmappableCharacter(CodingErrorAction.REPLACE)
365 .reset();
366 ByteBuffer bb = ByteBuffer.wrap(ba);
367 CharBuffer cb = CharBuffer.wrap(ca, off, len);
368 try {
369 CoderResult cr = ce.encode(cb, bb, true);
370 if (!cr.isUnderflow())
371 cr.throwException();
372 cr = ce.flush(bb);
373 if (!cr.isUnderflow())
374 cr.throwException();
375 } catch (CharacterCodingException x) {
376 throw new Error(x);
377 }
378 return safeTrim(ba, bb.position(), cs, isTrusted);
379 }
380 }
381
382 static byte[] encode(char[] ca, int off, int len) {
383 String csn = Charset.defaultCharset().name();
384 try {
385 return encode(csn, ca, off, len);
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205 // (3)getClass().getClassLoader0() is expensive
206 // (4)There might be a timing gap in isTrusted setting. getClassLoader0()
207 // is only chcked (and then isTrusted gets set) when (SM==null). It is
208 // possible that the SM==null for now but then SM is NOT null later
209 // when safeTrim() is invoked...the "safe" way to do is to redundant
210 // check (... && (isTrusted || SM == null || getClassLoader0())) in trim
211 // but it then can be argued that the SM is null when the opertaion
212 // is started...
213 CharsetDecoder cd = cs.newDecoder();
214 int en = scale(len, cd.maxCharsPerByte());
215 char[] ca = new char[en];
216 if (len == 0)
217 return ca;
218 boolean isTrusted = false;
219 if (System.getSecurityManager() != null) {
220 if (!(isTrusted = (cs.getClass().getClassLoader0() == null))) {
221 ba = Arrays.copyOfRange(ba, off, off + len);
222 off = 0;
223 }
224 }
225 cd.onMalformedInput(CodingErrorAction.REPLACE)
226 .onUnmappableCharacter(CodingErrorAction.REPLACE)
227 .reset();
228 if (cd instanceof ArrayDecoder) {
229 int clen = ((ArrayDecoder)cd).decode(ba, off, len, ca);
230 return safeTrim(ca, clen, cs, isTrusted);
231 } else {
232 ByteBuffer bb = ByteBuffer.wrap(ba, off, len);
233 CharBuffer cb = CharBuffer.wrap(ca);
234 try {
235 CoderResult cr = cd.decode(bb, cb, true);
236 if (!cr.isUnderflow())
237 cr.throwException();
238 cr = cd.flush(cb);
239 if (!cr.isUnderflow())
240 cr.throwException();
241 } catch (CharacterCodingException x) {
242 // Substitution is always enabled,
243 // so this shouldn't happen
244 throw new Error(x);
245 }
246 return safeTrim(ca, cb.position(), cs, isTrusted);
247 }
248 }
249
250 static char[] decode(byte[] ba, int off, int len) {
251 String csn = Charset.defaultCharset().name();
339 if (se == null)
340 throw new UnsupportedEncodingException (csn);
341 set(encoder, se);
342 }
343 return se.encode(ca, off, len);
344 }
345
346 static byte[] encode(Charset cs, char[] ca, int off, int len) {
347 CharsetEncoder ce = cs.newEncoder();
348 int en = scale(len, ce.maxBytesPerChar());
349 byte[] ba = new byte[en];
350 if (len == 0)
351 return ba;
352 boolean isTrusted = false;
353 if (System.getSecurityManager() != null) {
354 if (!(isTrusted = (cs.getClass().getClassLoader0() == null))) {
355 ca = Arrays.copyOfRange(ca, off, off + len);
356 off = 0;
357 }
358 }
359 ce.onMalformedInput(CodingErrorAction.REPLACE)
360 .onUnmappableCharacter(CodingErrorAction.REPLACE)
361 .reset();
362 if (ce instanceof ArrayEncoder) {
363 int blen = ((ArrayEncoder)ce).encode(ca, off, len, ba);
364 return safeTrim(ba, blen, cs, isTrusted);
365 } else {
366 ByteBuffer bb = ByteBuffer.wrap(ba);
367 CharBuffer cb = CharBuffer.wrap(ca, off, len);
368 try {
369 CoderResult cr = ce.encode(cb, bb, true);
370 if (!cr.isUnderflow())
371 cr.throwException();
372 cr = ce.flush(bb);
373 if (!cr.isUnderflow())
374 cr.throwException();
375 } catch (CharacterCodingException x) {
376 throw new Error(x);
377 }
378 return safeTrim(ba, bb.position(), cs, isTrusted);
379 }
380 }
381
382 static byte[] encode(char[] ca, int off, int len) {
383 String csn = Charset.defaultCharset().name();
384 try {
385 return encode(csn, ca, off, len);
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