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 static boolean loggingEnabled = "true".equals(System.getProperty("ibex.io.stream.logEnabled", "false"));
30 public void transcribe(Stream out) {
32 byte[] buf = new byte[1024];
34 int numread = in.read(buf, 0, buf.length);
35 if (numread==-1) return;
36 out.out.write(buf, 0, numread);
38 } catch (IOException ioe) { throw new StreamException(ioe); }
41 public static int countLines(Stream s) {
43 while(s.readln() != null) ret++;
47 public Stream(byte[] b, int off, int len) { this.in = new Stream.In(new ByteArrayInputStream(b, off, len)); this.out=null; }
48 public Stream(InputStream in) { this.in = new Stream.In(in); this.out = null; }
49 public Stream( OutputStream out) { this.in = null; this.out = new Stream.Out(out); }
50 public Stream(InputStream in, OutputStream out) { this.in = new Stream.In(in); this.out = new Stream.Out(out); }
51 public Stream(String s) { this(new ByteArrayInputStream(s.getBytes())); }
52 public Stream(File f) {
53 try { this.in = new Stream.In(new FileInputStream(f)); } catch (IOException e) { throw new StreamException(e); }
56 public Stream(Socket s) {
57 try { this.in = new Stream.In(s.getInputStream()); } catch (IOException e) { throw new StreamException(e); }
58 try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { throw new StreamException(e); }
61 private static int ioe(Exception e) { throw new StreamException(e); }
62 public static class StreamException extends RuntimeException {
63 public StreamException(Exception e) { super(e); }
64 public StreamException(String s) { super(s); }
66 public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
67 public static class Closed extends StreamException { public Closed(String s) { super(s); } }
70 private static Hashtable blocker = new Hashtable();
71 public static void kill(Thread thread) {
72 Stream block = (Stream)blocker.get(thread);
74 Log.warn(Stream.class, "thread " + thread + " is not blocked on a stream");
76 Log.warn(Stream.class, "asynchronously closing " + block);
82 Stream old = (Stream)blocker.get(Thread.currentThread());
84 blocker.put(Thread.currentThread(), this);
85 flush(); return in.getc(true);
86 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
89 Stream old = (Stream)blocker.get(Thread.currentThread());
91 blocker.put(Thread.currentThread(), this);
92 flush(); char ret = in.getc(false); log(ret); return ret;
93 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
95 public String readln() {
96 Stream old = (Stream)blocker.get(Thread.currentThread());
98 blocker.put(Thread.currentThread(), this);
99 flush(); String s = in.readln(); log(s); log('\n'); return s;
100 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
103 public void print(String s) {
104 Stream old = (Stream)blocker.get(Thread.currentThread());
106 blocker.put(Thread.currentThread(), this);
110 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
112 public void println(String s) {
113 Stream old = (Stream)blocker.get(Thread.currentThread());
115 blocker.put(Thread.currentThread(), this);
120 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
122 public void flush() {
123 Stream old = (Stream)blocker.get(Thread.currentThread());
125 blocker.put(Thread.currentThread(), this);
126 if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); }
127 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
129 public int read(byte[] b, int off, int len) {
130 Stream old = (Stream)blocker.get(Thread.currentThread());
132 blocker.put(Thread.currentThread(), this);
134 int ret = in.readBytes(b, off, len);
135 if (log != null) log("\n[read " + ret + " bytes of binary data ]\n");
138 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
140 public int read(char[] c, int off, int len) {
141 Stream old = (Stream)blocker.get(Thread.currentThread());
143 blocker.put(Thread.currentThread(), this);
145 int ret = in.read(c, off, len);
146 if (log != null && ret != -1) log(new String(c, off, ret));
148 } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
151 public void unread(String s) { in.unread(s); }
153 public void close() { try { if (in!=null) in.close(); } finally { if (out!=null) out.close(); } }
154 public void setNewline(String s) { newLine = s; }
157 /** dumps the connection log into a file */
158 public String dumpLog() { if (log==null) return ""; String ret = log.toString(); log = new StringBuffer(16 * 1024); return ret; }
159 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); }
160 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); }
161 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); }
162 private boolean nnl = false;
164 private static class Out extends BufferedOutputStream {
165 private Writer w = new BufferedWriter(new OutputStreamWriter(this));
166 public Out(OutputStream out) { super(out); }
167 public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
168 public void write(String s) { try { w.write(s); } catch (IOException e) { ioe(e); } }
171 private class In extends InputStream {
172 public final Reader reader = new InputStreamReader(this);
173 private /*final*/ InputStream orig;
174 public In(InputStream in) { orig = in; }
176 char[] cbuf = new char[8192];
180 byte[] buf = new byte[8192];
184 boolean flushing = false;
186 public int available() { return flushing ? 0 : (end - start); }
187 public void close() { try { if (orig!=null) orig.close(); } catch (Exception e) { Log.error(this, e); } }
189 public char getc(boolean peek) { try {
190 if (cstart == cend) {
192 cend = reader.read(cbuf, 0, cbuf.length);
195 if (in_next == null) throw new EOF();
197 orig = in_next.in.orig;
198 in_next = in_next.in_next;
202 return peek ? cbuf[cstart] : cbuf[cstart++];
203 } catch (IOException e) { return (char)ioe(e); } }
205 public String readln() { try {
207 for(int i=cstart; i<cend; i++)
208 if (cbuf[i] == '\n') {
209 // this should (in theory) handle CR, LF,
210 // CRLF, and LFCR properly, assuming that the
211 // file consistently uses the same ending
216 if (cbuf[begin] == '\r') { begin++; len--; }
217 while (len > 0 && cbuf[begin+len-1] == '\r') { len--; }
218 return new String(cbuf, begin, len);
221 int numread = reader.read(cbuf, cend, cbuf.length - cend);
223 if (cstart == cend) return null;
224 String ret = new String(cbuf, cstart, cend-cstart);
230 } catch (IOException e) { ioe(e); return null; } }
232 public int read(char[] c, int pos, int len) { try {
233 if (cstart == cend) {
235 cend = reader.read(cbuf, 0, cbuf.length);
236 if (cend == -1) { cend = cstart; return -1; }
238 if (len > cend - cstart) len = cend - cstart;
239 System.arraycopy(cbuf, cstart, c, pos, len);
242 } catch (IOException e) { ioe(e); return -1; } }
244 public int readBytes(byte[] b, int pos, int len) { flushchars(); return read(b, pos, len); }
245 public int read() { byte[] b = new byte[1]; if (read(b, 0, 1) == -1) return -1; return (int)b[0]; }
246 public int read(byte[] b, int pos, int len) { try {
249 end = orig.read(buf, 0, buf.length);
250 if (end == -1) { end = start; return -1; }
252 if (len > end - start) len = end - start;
253 System.arraycopy(buf, start, b, pos, len);
256 } catch (IOException e) { ioe(e); return -1; } }
258 private void growc(int s){char[] cbuf2=new char[cbuf.length+s*2];System.arraycopy(cbuf,0,cbuf2,0,cbuf.length);cbuf=cbuf2; }
259 private void shiftc() {
260 char[] cbuf2 = new char[cbuf.length];
261 System.arraycopy(cbuf, cstart, cbuf2, 0, cend-cstart);
266 private void ensurec(int space) { if (cend-cstart+space>cbuf.length) growc(space); if (cend+space>cbuf.length) shiftc(); }
268 private void growb(int s) { byte[] buf2 = new byte[buf.length+s*2]; System.arraycopy(buf,0,buf2,0,buf.length); buf=buf2; }
269 private void shiftb() { System.arraycopy(buf, start, buf, 0, end-start); end -= start; start = 0; }
270 private void ensureb(int space) { if (end-start+space>buf.length) growb(space); if (end+space>buf.length) shiftb(); }
271 private void ensureb2(int space) { if (end-start+space>buf.length) growb(space); if (start<space) unshiftb(); }
272 private void unshiftb() {
273 System.arraycopy(buf,start,buf,buf.length-(end-start),end-start);start=buf.length-(end-start);end=buf.length; }
275 public void unread(String s) { ensurec(s.length()); s.getChars(0, s.length(), cbuf, cend); cend += s.length(); }
277 private void flushchars() {
280 for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(1);
281 unreader.write(cbuf, cstart, cend);
284 } catch (IOException e) { ioe(e);
285 } finally { flushing = false; }
288 Writer unreader = new OutputStreamWriter(new InOutputStream());
289 private class InOutputStream extends OutputStream {
290 public void close() { }
291 public void write(int i) throws IOException { byte[] b = new byte[1]; b[0] = (byte)i; write(b, 0, 1); }
292 public void write(byte[] b) throws IOException { write(b, 0, b.length); }
293 public void write(byte[] b, int p, int l) {
295 System.arraycopy(b, p, buf, start-l, l);
301 public static interface Transformer {
302 public Stream transform(Stream in);