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";
21 public static boolean loggingEnabled = System.getProperty("ibex.io.stream.logEnabled", "true") != null;
23 public Stream(InputStream in) { this.in = new Stream.In(in); this.out = null; }
24 public Stream( OutputStream out) { this.in = null; this.out = new Stream.Out(out); }
25 public Stream(InputStream in, OutputStream out) { this.in = new Stream.In(in); this.out = new Stream.Out(out); }
26 public Stream(String s) { this(new ByteArrayInputStream(s.getBytes())); }
27 public Stream(Socket s) {
28 try { this.in = new Stream.In(s.getInputStream()); } catch (IOException e) { throw new StreamException(e); }
29 try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { throw new StreamException(e); }
32 private static int ioe(Exception e) { throw new StreamException(e); }
33 public static class StreamException extends RuntimeException {
34 public StreamException(Exception e) { super(e); }
35 public StreamException(String s) { super(s); }
37 public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
38 public static class Closed extends StreamException { public Closed(String s) { super(s); } }
41 private static Hashtable blocker = new Hashtable();
42 public static void kill(Thread thread) {
43 Stream block = (Stream)blocker.get(thread);
45 Log.warn(Stream.class, "thread " + thread + " is not blocked on a stream");
47 Log.warn(Stream.class, "asynchronously closing " + block);
53 Stream old = (Stream)blocker.get(Thread.currentThread());
55 blocker.put(Thread.currentThread(), this);
56 flush(); return in.getc(true);
57 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
60 Stream old = (Stream)blocker.get(Thread.currentThread());
62 blocker.put(Thread.currentThread(), this);
63 flush(); char ret = in.getc(false); log(ret); return ret;
64 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
66 public String readln() {
67 Stream old = (Stream)blocker.get(Thread.currentThread());
69 blocker.put(Thread.currentThread(), this);
70 flush(); String s = in.readln(); log(s); log('\n'); return s;
71 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
74 public void print(String s) {
75 Stream old = (Stream)blocker.get(Thread.currentThread());
77 blocker.put(Thread.currentThread(), this);
81 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
83 public void println(String s) {
84 Stream old = (Stream)blocker.get(Thread.currentThread());
86 blocker.put(Thread.currentThread(), this);
91 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
94 Stream old = (Stream)blocker.get(Thread.currentThread());
96 blocker.put(Thread.currentThread(), this);
97 if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); }
98 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
100 public int read(byte[] b, int off, int len) {
101 Stream old = (Stream)blocker.get(Thread.currentThread());
103 blocker.put(Thread.currentThread(), this);
105 int ret = in.readBytes(b, off, len);
106 if (log != null) log("\n[read " + ret + " bytes of binary data ]\n");
109 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
111 public int read(char[] c, int off, int len) {
112 Stream old = (Stream)blocker.get(Thread.currentThread());
114 blocker.put(Thread.currentThread(), this);
116 int ret = in.read(c, off, len);
117 if (log != null && ret != -1) log(new String(c, off, ret));
119 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
122 public void unread(String s) { in.unread(s); }
124 public void close() { try { in.close(); } finally { out.close(); } }
125 public void setNewline(String s) { newLine = s; }
128 /** dumps the connection log into a file */
129 public String dumpLog() { String ret = log.toString(); log = new StringBuffer(16 * 1024); return ret; }
130 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); }
131 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); }
132 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); }
133 private boolean nnl = false;
135 private static class Out extends BufferedOutputStream {
136 private Writer w = new BufferedWriter(new OutputStreamWriter(this));
137 public Out(OutputStream out) { super(out); }
138 public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
139 public void write(String s) { try { w.write(s); } catch (IOException e) { ioe(e); } }
142 private static class In extends InputStream {
143 public Reader reader = new InputStreamReader(this);
144 private final InputStream orig;
145 public In(InputStream in) { orig = in; }
147 char[] cbuf = new char[8192];
151 byte[] buf = new byte[8192];
155 boolean flushing = false;
157 public int available() { return flushing ? 0 : (end - start); }
158 public void close() { try { orig.close(); } catch (Exception e) { Log.error(this, e); } }
160 public char getc(boolean peek) { try {
161 if (cstart == cend) {
163 cend = reader.read(cbuf, 0, cbuf.length);
164 if (cend == -1) { cend = cstart; throw new EOF(); }
166 return peek ? cbuf[cstart] : cbuf[cstart++];
167 } catch (IOException e) { return (char)ioe(e); } }
169 public String readln() { try {
171 for(int i=cstart; i<cend; i++)
172 if (cbuf[i] == '\n') {
173 // this should (in theory) handle CR, LF,
174 // CRLF, and LFCR properly, assuming that the
175 // file consistently uses the same ending
180 if (cbuf[begin] == '\r') { begin++; len--; }
181 while (len > 0 && cbuf[begin+len-1] == '\r') { len--; }
182 return new String(cbuf, begin, len);
185 int numread = reader.read(cbuf, cend, cbuf.length - cend);
187 if (cstart == cend) return null;
188 String ret = new String(cbuf, cstart, cend-cstart);
194 } catch (IOException e) { ioe(e); return null; } }
196 public int read(char[] c, int pos, int len) { try {
197 if (cstart == cend) {
199 cend = reader.read(cbuf, 0, cbuf.length);
200 if (cend == -1) { cend = cstart; return -1; }
202 if (len > cend - cstart) len = cend - cstart;
203 System.arraycopy(cbuf, cstart, c, pos, len);
206 } catch (IOException e) { ioe(e); return -1; } }
208 public int readBytes(byte[] b, int pos, int len) { flushchars(); return read(b, pos, len); }
209 public int read() { byte[] b = new byte[1]; if (read(b, 0, 1) == -1) return -1; return (int)b[0]; }
210 public int read(byte[] b, int pos, int len) { try {
213 end = orig.read(buf, 0, buf.length);
214 if (end == -1) { end = start; return -1; }
216 if (len > end - start) len = end - start;
217 System.arraycopy(buf, start, b, pos, len);
220 } catch (IOException e) { ioe(e); return -1; } }
222 private void growc(int s){char[] cbuf2=new char[cbuf.length+s*2];System.arraycopy(cbuf,0,cbuf2,0,cbuf.length);cbuf=cbuf2; }
223 private void shiftc() {
224 char[] cbuf2 = new char[cbuf.length];
225 System.arraycopy(cbuf, cstart, cbuf2, 0, cend-cstart);
230 private void ensurec(int space) { if (cend-cstart+space>cbuf.length) growc(space); if (cend+space>cbuf.length) shiftc(); }
232 private void growb(int s) { byte[] buf2 = new byte[buf.length+s*2]; System.arraycopy(buf,0,buf2,0,buf.length); buf=buf2; }
233 private void shiftb() { System.arraycopy(buf, start, buf, 0, end-start); end -= start; start = 0; }
234 private void ensureb(int space) { if (end-start+space>buf.length) growb(space); if (end+space>buf.length) shiftb(); }
235 private void ensureb2(int space) { if (end-start+space>buf.length) growb(space); if (start<space) unshiftb(); }
236 private void unshiftb() {
237 System.arraycopy(buf,start,buf,buf.length-(end-start),end-start);start=buf.length-(end-start);end=buf.length; }
239 public void unread(String s) { ensurec(s.length()); s.getChars(0, s.length(), cbuf, cend); cend += s.length(); }
241 private void flushchars() {
244 for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(1);
245 unreader.write(cbuf, cstart, cend);
248 } catch (IOException e) { ioe(e);
249 } finally { flushing = false; }
252 Writer unreader = new OutputStreamWriter(new InOutputStream());
253 private class InOutputStream extends OutputStream {
254 public void close() { }
255 public void write(int i) throws IOException { byte[] b = new byte[1]; b[0] = (byte)i; write(b, 0, 1); }
256 public void write(byte[] b) throws IOException { write(b, 0, b.length); }
257 public void write(byte[] b, int p, int l) {
259 System.arraycopy(b, p, buf, start-l, l);