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 appendStream(Stream in_next) {
23 if (this.in_next != null) return this.in_next.appendStream(in_next);
24 this.in_next = in_next;
28 public Stream(InputStream in) { this.in = new Stream.In(in); this.out = null; }
29 public Stream( OutputStream out) { this.in = null; this.out = new Stream.Out(out); }
30 public Stream(InputStream in, OutputStream out) { this.in = new Stream.In(in); this.out = new Stream.Out(out); }
31 public Stream(String s) { this(new ByteArrayInputStream(s.getBytes())); }
32 public Stream(Socket s) {
33 try { this.in = new Stream.In(s.getInputStream()); } catch (IOException e) { throw new StreamException(e); }
34 try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { throw new StreamException(e); }
37 private static int ioe(Exception e) { throw new StreamException(e); }
38 public static class StreamException extends RuntimeException {
39 public StreamException(Exception e) { super(e); }
40 public StreamException(String s) { super(s); }
42 public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
43 public static class Closed extends StreamException { public Closed(String s) { super(s); } }
46 private static Hashtable blocker = new Hashtable();
47 public static void kill(Thread thread) {
48 Stream block = (Stream)blocker.get(thread);
50 Log.warn(Stream.class, "thread " + thread + " is not blocked on a stream");
52 Log.warn(Stream.class, "asynchronously closing " + block);
58 Stream old = (Stream)blocker.get(Thread.currentThread());
60 blocker.put(Thread.currentThread(), this);
61 flush(); return in.getc(true);
62 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
65 Stream old = (Stream)blocker.get(Thread.currentThread());
67 blocker.put(Thread.currentThread(), this);
68 flush(); char ret = in.getc(false); log(ret); return ret;
69 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
71 public String readln() {
72 Stream old = (Stream)blocker.get(Thread.currentThread());
74 blocker.put(Thread.currentThread(), this);
75 flush(); String s = in.readln(); log(s); log('\n'); return s;
76 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
79 public void print(String s) {
80 Stream old = (Stream)blocker.get(Thread.currentThread());
82 blocker.put(Thread.currentThread(), this);
86 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
88 public void println(String s) {
89 Stream old = (Stream)blocker.get(Thread.currentThread());
91 blocker.put(Thread.currentThread(), this);
96 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
99 Stream old = (Stream)blocker.get(Thread.currentThread());
101 blocker.put(Thread.currentThread(), this);
102 if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); }
103 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
105 public int read(byte[] b, int off, int len) {
106 Stream old = (Stream)blocker.get(Thread.currentThread());
108 blocker.put(Thread.currentThread(), this);
110 int ret = in.readBytes(b, off, len);
111 if (log != null) log("\n[read " + ret + " bytes of binary data ]\n");
114 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
116 public int read(char[] c, int off, int len) {
117 Stream old = (Stream)blocker.get(Thread.currentThread());
119 blocker.put(Thread.currentThread(), this);
121 int ret = in.read(c, off, len);
122 if (log != null && ret != -1) log(new String(c, off, ret));
124 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
127 public void unread(String s) { in.unread(s); }
129 public void close() { try { in.close(); } finally { out.close(); } }
130 public void setNewline(String s) { newLine = s; }
133 /** dumps the connection log into a file */
134 public String dumpLog() { String ret = log.toString(); log = new StringBuffer(16 * 1024); return ret; }
135 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); }
136 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); }
137 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); }
138 private boolean nnl = false;
140 private static class Out extends BufferedOutputStream {
141 private Writer w = new BufferedWriter(new OutputStreamWriter(this));
142 public Out(OutputStream out) { super(out); }
143 public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
144 public void write(String s) { try { w.write(s); } catch (IOException e) { ioe(e); } }
147 private class In extends InputStream {
148 public final Reader reader = new InputStreamReader(this);
149 private /*final*/ InputStream orig;
150 public In(InputStream in) { orig = in; }
152 char[] cbuf = new char[8192];
156 byte[] buf = new byte[8192];
160 boolean flushing = false;
162 public int available() { return flushing ? 0 : (end - start); }
163 public void close() { try { orig.close(); } catch (Exception e) { Log.error(this, e); } }
165 public char getc(boolean peek) { try {
166 if (cstart == cend) {
168 cend = reader.read(cbuf, 0, cbuf.length);
171 if (in_next == null) throw new EOF();
173 orig = in_next.in.orig;
174 in_next = in_next.in_next;
178 return peek ? cbuf[cstart] : cbuf[cstart++];
179 } catch (IOException e) { return (char)ioe(e); } }
181 public String readln() { try {
183 for(int i=cstart; i<cend; i++)
184 if (cbuf[i] == '\n') {
185 // this should (in theory) handle CR, LF,
186 // CRLF, and LFCR properly, assuming that the
187 // file consistently uses the same ending
192 if (cbuf[begin] == '\r') { begin++; len--; }
193 while (len > 0 && cbuf[begin+len-1] == '\r') { len--; }
194 return new String(cbuf, begin, len);
197 int numread = reader.read(cbuf, cend, cbuf.length - cend);
199 if (cstart == cend) return null;
200 String ret = new String(cbuf, cstart, cend-cstart);
206 } catch (IOException e) { ioe(e); return null; } }
208 public int read(char[] c, int pos, int len) { try {
209 if (cstart == cend) {
211 cend = reader.read(cbuf, 0, cbuf.length);
212 if (cend == -1) { cend = cstart; return -1; }
214 if (len > cend - cstart) len = cend - cstart;
215 System.arraycopy(cbuf, cstart, c, pos, len);
218 } catch (IOException e) { ioe(e); return -1; } }
220 public int readBytes(byte[] b, int pos, int len) { flushchars(); return read(b, pos, len); }
221 public int read() { byte[] b = new byte[1]; if (read(b, 0, 1) == -1) return -1; return (int)b[0]; }
222 public int read(byte[] b, int pos, int len) { try {
225 end = orig.read(buf, 0, buf.length);
226 if (end == -1) { end = start; return -1; }
228 if (len > end - start) len = end - start;
229 System.arraycopy(buf, start, b, pos, len);
232 } catch (IOException e) { ioe(e); return -1; } }
234 private void growc(int s){char[] cbuf2=new char[cbuf.length+s*2];System.arraycopy(cbuf,0,cbuf2,0,cbuf.length);cbuf=cbuf2; }
235 private void shiftc() {
236 char[] cbuf2 = new char[cbuf.length];
237 System.arraycopy(cbuf, cstart, cbuf2, 0, cend-cstart);
242 private void ensurec(int space) { if (cend-cstart+space>cbuf.length) growc(space); if (cend+space>cbuf.length) shiftc(); }
244 private void growb(int s) { byte[] buf2 = new byte[buf.length+s*2]; System.arraycopy(buf,0,buf2,0,buf.length); buf=buf2; }
245 private void shiftb() { System.arraycopy(buf, start, buf, 0, end-start); end -= start; start = 0; }
246 private void ensureb(int space) { if (end-start+space>buf.length) growb(space); if (end+space>buf.length) shiftb(); }
247 private void ensureb2(int space) { if (end-start+space>buf.length) growb(space); if (start<space) unshiftb(); }
248 private void unshiftb() {
249 System.arraycopy(buf,start,buf,buf.length-(end-start),end-start);start=buf.length-(end-start);end=buf.length; }
251 public void unread(String s) { ensurec(s.length()); s.getChars(0, s.length(), cbuf, cend); cend += s.length(); }
253 private void flushchars() {
256 for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(1);
257 unreader.write(cbuf, cstart, cend);
260 } catch (IOException e) { ioe(e);
261 } finally { flushing = false; }
264 Writer unreader = new OutputStreamWriter(new InOutputStream());
265 private class InOutputStream extends OutputStream {
266 public void close() { }
267 public void write(int i) throws IOException { byte[] b = new byte[1]; b[0] = (byte)i; write(b, 0, 1); }
268 public void write(byte[] b) throws IOException { write(b, 0, b.length); }
269 public void write(byte[] b, int p, int l) {
271 System.arraycopy(b, p, buf, start-l, l);