1 // Copyright 2000-2005 the Contributors, as shown in the revision logs.
2 // Licensed under the Apache Public Source License 2.0 ("the License").
3 // You may not use this file except in compliance with the License.
10 import java.util.zip.*;
11 import org.ibex.util.*;
13 /** plays the role of InputStream, OutputStream, Reader and Writer, with logging and unchecked exceptions */
16 protected final In in;
17 protected final Out out;
18 private StringBuffer log = loggingEnabled ? new StringBuffer(16 * 1024) : null;
19 private String newLine = "\r\n";
20 private Stream in_next = null;
22 public Stream append(String in_next) { return appendStream(new Stream(in_next)); }
23 public Stream appendStream(Stream in_next) {
24 if (this.in_next != null) return this.in_next.appendStream(in_next);
25 this.in_next = in_next;
29 //public static boolean loggingEnabled = "true".equals(System.getProperty("ibex.io.stream.logEnabled", "false"));
30 public static boolean loggingEnabled = true;
32 public void transcribe(Stream out) { transcribe(out, false); }
33 public void transcribe(Stream out, boolean close) {
35 byte[] buf = new byte[1024];
37 int numread = in.read(buf, 0, buf.length);
38 if (numread==-1) break;
39 out.out.write(buf, 0, numread);
41 if (close) out.close();
42 } catch (IOException ioe) { ioe(ioe); }
45 public void transcribe(StringBuffer out) {
47 char[] buf = new char[1024];
49 int numread = in.read(buf, 0, buf.length);
50 if (numread==-1) return;
51 out.append(buf, 0, numread);
53 //} catch (IOException ioe) { ioe(ioe); }
56 public static int countLines(Stream s) {
58 while(s.readln() != null) ret++;
62 public Stream(byte[] b, int off, int len) { this.in = new Stream.In(new ByteArrayInputStream(b, off, len)); this.out=null; }
63 public Stream(InputStream in) { this.in = new Stream.In(in); this.out = null; }
64 public Stream( OutputStream out) { this.in = null; this.out = new Stream.Out(out); }
65 public Stream(InputStream in, OutputStream out) { this.in = new Stream.In(in); this.out = new Stream.Out(out); }
66 public Stream(String s) { this(new ByteArrayInputStream(s.getBytes())); }
67 public Stream(File f) {
68 try { this.in = new Stream.In(new FileInputStream(f)); } catch (IOException e) { ioe(e); throw new Error(); }
71 public Stream(Socket s) {
72 try { this.in = new Stream.In(s.getInputStream()); } catch (IOException e) { ioe(e); throw new Error(); }
73 try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { ioe(e); throw new Error(); }
76 static int ioe(IOException e) {
77 if (e instanceof SocketException && e.toString().indexOf("Connection reset")!=-1)
78 throw new Closed(e.getMessage());
79 throw new StreamException(e);
81 public static class StreamException extends RuntimeException {
82 public StreamException(Exception e) { super(e); }
83 public StreamException(String s) { super(s); }
85 public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
86 public static class Closed extends StreamException { public Closed(String s) { super(s); } }
89 private static Hashtable blocker = new Hashtable();
90 public static void kill(Thread thread) {
91 Stream block = (Stream)blocker.get(thread);
93 Log.warn(Stream.class, "thread " + thread + " is not blocked on a stream");
95 Log.warn(Stream.class, "asynchronously closing " + block);
100 public char peekc() {
101 Stream old = (Stream)blocker.get(Thread.currentThread());
103 blocker.put(Thread.currentThread(), this);
104 flush(); return in.getc(true);
105 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
108 Stream old = (Stream)blocker.get(Thread.currentThread());
110 blocker.put(Thread.currentThread(), this);
111 flush(); char ret = in.getc(false); log(ret); return ret;
112 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
114 public String readln() {
115 Stream old = (Stream)blocker.get(Thread.currentThread());
117 blocker.put(Thread.currentThread(), this);
118 flush(); String s = in.readln(); log(s); log('\n'); return s;
119 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
122 public void print(String s) {
123 Stream old = (Stream)blocker.get(Thread.currentThread());
125 blocker.put(Thread.currentThread(), this);
129 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
131 public void println(String s) {
132 Stream old = (Stream)blocker.get(Thread.currentThread());
134 blocker.put(Thread.currentThread(), this);
140 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
142 public void flush() {
143 Stream old = (Stream)blocker.get(Thread.currentThread());
145 blocker.put(Thread.currentThread(), this);
146 if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); }
147 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
149 public int read(byte[] b, int off, int len) {
150 Stream old = (Stream)blocker.get(Thread.currentThread());
152 blocker.put(Thread.currentThread(), this);
154 int ret = in.readBytes(b, off, len);
155 if (log != null) log("\n[read " + ret + " bytes of binary data ]\n");
158 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
160 public int read(char[] c, int off, int len) {
161 Stream old = (Stream)blocker.get(Thread.currentThread());
163 blocker.put(Thread.currentThread(), this);
165 int ret = in.read(c, off, len);
166 if (log != null && ret != -1) log(new String(c, off, ret));
168 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
171 public void unread(String s) { in.unread(s); }
173 /** should not throw exceptions */
174 public void close() { try { if (in!=null) in.close(); } finally { if (out!=null) out.close(); } }
175 public void setNewline(String s) { newLine = s; }
178 /** dumps the connection log into a file */
179 public String dumpLog() { if (log==null) return ""; String ret = log.toString(); log = new StringBuffer(16 * 1024); return ret; }
180 private void log(String s) { if(log==null) return; if (!nnl) Log.note("\n[read ] "); Log.note(s + "\n"); nnl=false; if (log != null) log.append(s); }
181 private void logWrite(String s) { if(log==null) return; if (nnl) Log.note("\n"); Log.note("[write] "+s+"\n"); nnl=false; if (log != null) log.append(s); }
182 private void log(char c) { if(log==null) return; if (c == '\r') return; if (!nnl) Log.note("[read ] "); Log.note(c+""); nnl = c != '\n'; if (log != null) log.append(c); }
183 private boolean nnl = false;
185 private static class Out extends BufferedOutputStream {
186 private Writer w = new BufferedWriter(new OutputStreamWriter(this));
187 public Out(OutputStream out) { super(out); }
188 public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
189 public void write(String s) { try { w.write(s); } catch (IOException e) { ioe(e); } }
192 private class In extends InputStream {
193 public final Reader reader = new InputStreamReader(this);
194 private /*final*/ InputStream orig;
195 public In(InputStream in) { orig = in; }
197 char[] cbuf = new char[8192];
201 byte[] buf = new byte[8192];
205 boolean flushing = false;
207 public int available() { return flushing ? 0 : (end - start); }
208 public void close() { try { if (orig!=null) orig.close(); } catch (Exception e) { Log.error(this, e); } }
210 public char getc(boolean peek) { try {
211 if (cstart == cend) {
213 cend = reader.read(cbuf, 0, cbuf.length);
216 if (in_next == null) throw new EOF();
218 orig = in_next.in.orig;
219 in_next = in_next.in_next;
223 return peek ? cbuf[cstart] : cbuf[cstart++];
224 } catch (IOException e) { return (char)ioe(e); } }
226 public String readln() { try {
228 for(int i=cstart; i<cend; i++)
229 if (cbuf[i] == '\n') {
230 // this should (in theory) handle CR, LF,
231 // CRLF, and LFCR properly, assuming that the
232 // file consistently uses the same ending
237 if (cbuf[begin] == '\r') { begin++; len--; }
238 while (len > 0 && cbuf[begin+len-1] == '\r') { len--; }
239 return new String(cbuf, begin, len);
242 int numread = reader.read(cbuf, cend, cbuf.length - cend);
244 if (cstart == cend) return null;
245 String ret = new String(cbuf, cstart, cend-cstart);
251 } catch (IOException e) { ioe(e); return null; } }
253 public int read(char[] c, int pos, int len) { try {
254 if (cstart == cend) {
256 cend = reader.read(cbuf, 0, cbuf.length);
257 if (cend == -1) { cend = cstart; return -1; }
259 if (len > cend - cstart) len = cend - cstart;
260 System.arraycopy(cbuf, cstart, c, pos, len);
263 } catch (IOException e) { ioe(e); return -1; } }
265 public int readBytes(byte[] b, int pos, int len) { flushchars(); return read(b, pos, len); }
266 public int read() { byte[] b = new byte[1]; if (read(b, 0, 1) == -1) return -1; return (int)b[0]; }
267 public int read(byte[] b, int pos, int len) { try {
270 end = orig.read(buf, 0, buf.length);
271 if (end == -1) { end = start; return -1; }
273 if (len > end - start) len = end - start;
274 System.arraycopy(buf, start, b, pos, len);
277 } catch (IOException e) { ioe(e); return -1; } }
279 private void growc(int s){char[] cbuf2=new char[cbuf.length+s*2];System.arraycopy(cbuf,0,cbuf2,0,cbuf.length);cbuf=cbuf2; }
280 private void shiftc() {
281 char[] cbuf2 = new char[cbuf.length];
282 System.arraycopy(cbuf, cstart, cbuf2, 0, cend-cstart);
287 private void ensurec(int space) { if (cend-cstart+space>cbuf.length) growc(space); if (cend+space>cbuf.length) shiftc(); }
289 private void growb(int s) { byte[] buf2 = new byte[buf.length+s*2]; System.arraycopy(buf,0,buf2,0,buf.length); buf=buf2; }
290 private void shiftb() { System.arraycopy(buf, start, buf, 0, end-start); end -= start; start = 0; }
291 private void ensureb(int space) { if (end-start+space>buf.length) growb(space); if (end+space>buf.length) shiftb(); }
292 private void ensureb2(int space) { if (end-start+space>buf.length) growb(space); if (start<space) unshiftb(); }
293 private void unshiftb() {
294 System.arraycopy(buf,start,buf,buf.length-(end-start),end-start);start=buf.length-(end-start);end=buf.length; }
296 public void unread(String s) { ensurec(s.length()); s.getChars(0, s.length(), cbuf, cend); cend += s.length(); }
298 private void flushchars() {
301 for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(1);
302 unreader.write(cbuf, cstart, cend);
305 } catch (IOException e) { ioe(e);
306 } finally { flushing = false; }
309 Writer unreader = new OutputStreamWriter(new InOutputStream());
310 private class InOutputStream extends OutputStream {
311 public void close() { }
312 public void write(int i) throws IOException { byte[] b = new byte[1]; b[0] = (byte)i; write(b, 0, 1); }
313 public void write(byte[] b) throws IOException { write(b, 0, b.length); }
314 public void write(byte[] b, int p, int l) {
316 System.arraycopy(b, p, buf, start-l, l);
322 public static interface Transformer {
323 public Stream transform(Stream in);