-// Copyright 2000-2005 the Contributors, as shown in the revision logs.
+// Copyright 2000-2007 the Contributors, as shown in the revision logs.
// Licensed under the Apache Public Source License 2.0 ("the License").
// You may not use this file except in compliance with the License.
import java.util.*;
import java.util.zip.*;
import org.ibex.util.*;
+import org.ibex.crypto.*;
+
+// Features:
+// - automatically flush writer before reading on linked read/write pairs
+// - no checked exceptions thrown
+// - unified write(char), print(char), and write(byte)
+// - unreading/peeking
+// - transcribe
+// - append (daisy-chaining)
+// - automatically closes input streams when end reached
/** plays the role of InputStream, OutputStream, Reader and Writer, with logging and unchecked exceptions */
public class Stream {
protected final In in;
protected final Out out;
- private StringBuffer log = loggingEnabled ? new StringBuffer(16 * 1024) : null;
private String newLine = "\r\n";
- private Stream in_next = null;
-
- public Stream append(String in_next) { return appendStream(new Stream(in_next)); }
- public Stream appendStream(Stream in_next) {
- if (this.in_next != null)
- this.in_next.appendStream(in_next);
- else
- this.in_next = in_next;
- return this;
- }
-
- //public static boolean loggingEnabled = "true".equals(System.getProperty("ibex.io.stream.logEnabled", "false"));
- public static boolean loggingEnabled = true;
-
- public void transcribe(Stream out) { transcribe(out, false); }
- public void transcribe(Stream out, boolean close) {
- try {
- byte[] buf = new byte[1024];
- while(true) {
- int numread = in.read(buf, 0, buf.length);
- if (numread==-1) { in.close(); break; }
- out.out.write(buf, 0, numread);
- }
- if (close) out.close();
- } catch (IOException ioe) { ioe(ioe); }
- }
-
- public void transcribe(StringBuffer out) {
- //try {
- char[] buf = new char[1024];
- while(true) {
- int numread = in.read(buf, 0, buf.length);
- if (numread==-1) { in.close(); return; }
- out.append(buf, 0, numread);
- }
- //} catch (IOException ioe) { ioe(ioe); }
- }
- public static int countLines(Stream s) {
- int ret = 0;
- while(s.readln() != null) ret++;
- s.close();
- return ret;
- }
-
- public Stream(byte[] b, int off, int len) { this.in = new Stream.In(new ByteArrayInputStream(b, off, len)); this.out=null; }
+ public Stream(byte[] b, int off, int len) { this.in = new Stream.In(new ByteArrayInputStream(b, off, len)); this.out=null; }
public Stream(InputStream in) { this.in = new Stream.In(in); this.out = null; }
public Stream( OutputStream out) { this.in = null; this.out = new Stream.Out(out); }
public Stream(InputStream in, OutputStream out) { this.in = new Stream.In(in); this.out = new Stream.Out(out); }
try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { ioe(e); throw new Error(); }
}
- static int ioe(IOException e) {
- if (e instanceof SocketException && e.toString().indexOf("Connection reset")!=-1)
- throw new Closed(e.getMessage());
- throw new StreamException(e);
- }
- public static class StreamException extends RuntimeException {
- public StreamException(Exception e) { super(e); }
- public StreamException(String s) { super(s); }
- }
- public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
- public static class Closed extends StreamException { public Closed(String s) { super(s); } }
-
-
- private static Hashtable blocker = new Hashtable();
- public static void kill(Thread thread) {
- Stream block = (Stream)blocker.get(thread);
- if (block == null) {
- Log.warn(Stream.class, "thread " + thread + " is not blocked on a stream");
- } else {
- Log.warn(Stream.class, "asynchronously closing " + block);
- block.close();
- }
- }
-
- public char peekc() {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush(); return in.getc(true);
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public char getc() {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush(); char ret = in.getc(false); log(ret); return ret;
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public String readln() {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush(); String s = in.readln(); log(s); log('\n'); return s;
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
-
- public void print(String s) {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- logWrite(s);
- out.write(s);
- flush();
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public void println(String s) {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- logWrite(s);
- logWrite(newLine);
- out.write(s);
- out.write(newLine);
- flush();
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public void flush() {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); }
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public int read(byte[] b, int off, int len) {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush();
- int ret = in.readBytes(b, off, len);
- if (log != null) log("\n[read " + ret + " bytes of binary data ]\n");
- nnl = false;
- return ret;
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
- public int read(char[] c, int off, int len) {
- Stream old = (Stream)blocker.get(Thread.currentThread());
- try {
- blocker.put(Thread.currentThread(), this);
- flush();
- int ret = in.read(c, off, len);
- if (log != null && ret != -1) log(new String(c, off, ret));
- return ret;
- } finally { if (old == null) blocker.remove(Thread.currentThread()); else blocker.put(Thread.currentThread(), old); }
- }
-
- public void unread(String s) { in.unread(s); }
+ // Main API //////////////////////////////////////////////////////////////////////////////
- /** should not throw exceptions */
+ public char peekc() { flush(); return in.getc(true); }
+ public char getc() { flush(); return in.getc(false); }
+ public String readln() { flush(); return in.readln(); }
+ public void print(String s) { out.write(s); flush(); }
+ public void println(String s) { print(s); print(newLine); }
+ public void flush() { if (out != null) out.flushWriter(); }
+ public void writeBytes(byte[] b, int off, int len) { try { out.write(b, off, len); } catch (IOException e) { ioe(e); } }
+ public int read(byte[] b, int off, int len) { flush(); return in.readBytes(b, off, len); }
+ public int read(char[] c, int off, int len) { flush(); return in.readChars(c, off, len); }
public void close() { try { if (in!=null) in.close(); } finally { if (out!=null) out.close(); } }
public void setNewline(String s) { newLine = s; }
+ public InputStream getInputStream() { return in; }
-
- /** dumps the connection log into a file */
- public String dumpLog() { if (log==null) return ""; String ret = log.toString(); log = new StringBuffer(16 * 1024); return ret; }
- 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); }
- 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); }
- 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); }
- private boolean nnl = false;
+ public void setInputDigest(Digest d) { in.bbis.digest = d; }
private static class Out extends BufferedOutputStream {
- private Writer w = new BufferedWriter(new OutputStreamWriter(this));
+ private Writer writer = new OutputStreamWriter(this);
public Out(OutputStream out) { super(out); }
- public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
- public void write(String s) { try { w.write(s); } catch (IOException e) { ioe(e); } }
+ public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
+ public void write(String s) { try { writer.write(s); } catch (IOException e) { ioe(e); } }
+ private void flushWriter() { try { writer.flush(); } catch (IOException e) { ioe(e); } }
+ private boolean flushing = false;
+ public void flush() {
+ if (flushing) return;
+ try {
+ flushing = true;
+ try {
+ writer.flush();
+ } finally { flushing = false; }
+ super.flush();
+ } catch (IOException e) { ioe(e); }
+ }
}
private class In extends InputStream {
- public final Reader reader = new InputStreamReader(this);
- private /*final*/ InputStream orig;
- public In(InputStream in) { orig = in; }
-
- char[] cbuf = new char[8192];
- int cstart = 0;
- int cend = 0;
-
- byte[] buf = new byte[8192];
- int start = 0;
- int end = 0;
-
- boolean flushing = false;
-
- public int available() { return flushing ? 0 : (end - start); }
- public void close() { try {
- if (orig!=null) orig.close();
- if (in_next != null) in_next.close(); // FIXME: correct?
- } catch (Exception e) { Log.error(this, e); } }
-
- public char getc(boolean peek) { try {
- if (cstart == cend) {
- cstart = 0;
- cend = reader.read(cbuf, 0, cbuf.length);
- if (cend == -1) {
- reader.close();
- cend = cstart;
- if (in_next == null) throw new EOF();
- return getc(peek);
- }
- }
- return peek ? cbuf[cstart] : cbuf[cstart++];
- } catch (IOException e) { return (char)ioe(e); } }
-
- public String readln() { try {
- while(true) {
- for(int i=cstart; i<cend; i++)
- if (cbuf[i] == '\n') {
- // this should (in theory) handle CR, LF,
- // CRLF, and LFCR properly, assuming that the
- // file consistently uses the same ending
- // throughout.
- int begin = cstart;
- int len = i-cstart;
- cstart = i+1;
- if (cbuf[begin] == '\r') { begin++; len--; }
- while (len > 0 && cbuf[begin+len-1] == '\r') { len--; }
- return new String(cbuf, begin, len);
+ private ByteBufInputStream bbis;
+ private CharBufReader cbr;
+ public Reader reader;
+ private Writer unreader;
+
+ public char getc(boolean peek) { return cbr.getc(peek); }
+ public String readln() { return cbr.readln(); }
+ public int read() { return bbis.read(); }
+ public int read(byte[] b) { try { return bbis.read(b); } catch (IOException e) { ioe(e); return 0; } }
+ public int read(byte[] b, int off, int len) { return bbis.read(b, off, len); }
+ public void close() { try { cbr.close(); } catch (Exception e) { Log.error(this, e); } }
+ public int readBytes(byte[] b, int off, int len) { return bbis.read(b, off, len); }
+ public int readChars(char[] c, int off, int len) { return cbr.read(c, off, len); }
+
+ public In(InputStream in) {
+ bbis = new ByteBufInputStream(in) {
+ public void preread() {
+ cbr.unbuffer(unreader);
+ try {
+ if (!cbr.ready()) return;
+ } catch (IOException e) { ioe(e); }
+ char[] c = new char[20];
+ while(true) {
+ try {
+ if (!cbr.ready()) break;
+ int numread = cbr.read(c, 0, c.length);
+ if (numread == -1) break;
+ unreader.write(c, 0, numread);
+ } catch (IOException e) { ioe(e); }
+ }
}
- ensurec(256);
- int numread = reader.read(cbuf, cend, cbuf.length - cend);
- if (numread == -1) {
- reader.close();
- if (cstart == cend) return null;
- String ret = new String(cbuf, cstart, cend-cstart);
- cstart = cend = 0;
- return ret;
- }
- cend += numread;
- }
- } catch (IOException e) { ioe(e); return null; } }
+ };
+ unreader = new OutputStreamWriter(new UnReaderStream(bbis));
+ cbr = new CharBufReader(new InputStreamReader(bbis));
+ }
+ }
- public int read(char[] c, int pos, int len) { try {
- if (cstart == cend) {
- cstart = 0;
- cend = reader.read(cbuf, 0, cbuf.length);
- if (cend == -1) { reader.close(); cend = cstart; return -1; }
- }
- if (len > cend - cstart) len = cend - cstart;
- System.arraycopy(cbuf, cstart, c, pos, len);
- cstart += len;
- return len;
- } catch (IOException e) { ioe(e); return -1; } }
+ // Utilities: append() and transcribe() ///////////////////////////////////////////////////////
- public int readBytes(byte[] b, int pos, int len) { flushchars(); return read(b, pos, len); }
- public int read() { byte[] b = new byte[1]; if (read(b, 0, 1) == -1) return -1; return (int)b[0]; }
- public int read(byte[] b, int pos, int len) { try {
- if (start == end) {
- start = 0;
- end = orig.read(buf, 0, buf.length);
- if (end == -1) {
- orig.close();
- end = start;
- if (in_next==null) return -1;
- return in_next.read(b, pos, len);
- }
- }
- if (len > end - start) len = end - start;
- System.arraycopy(buf, start, b, pos, len);
- start += len;
- return len;
- } catch (IOException e) { ioe(e); return -1; } }
+ public Stream append(String in_next) { return appendStream(new Stream(in_next)); }
+ public Stream appendStream(Stream in_next) { in.bbis.appendStream(in_next); return this; }
- private void growc(int s){char[] cbuf2=new char[cbuf.length+s*2];System.arraycopy(cbuf,0,cbuf2,0,cbuf.length);cbuf=cbuf2; }
- private void shiftc() {
- char[] cbuf2 = new char[cbuf.length];
- System.arraycopy(cbuf, cstart, cbuf2, 0, cend-cstart);
- cend -= cstart;
- cstart = 0;
- cbuf = cbuf2;
+ public void transcribe(Stream out) { transcribe(out, false); }
+ public void transcribe(Stream out, boolean close) {
+ byte[] buf = new byte[1024];
+ while(true) {
+ int numread = in.read(buf, 0, buf.length);
+ if (numread==-1) { in.close(); break; }
+ out.writeBytes(buf, 0, numread);
}
- private void ensurec(int space) { if (cend-cstart+space>cbuf.length) growc(space); if (cend+space>cbuf.length) shiftc(); }
-
- private void growb(int s) { byte[] buf2 = new byte[buf.length+s*2]; System.arraycopy(buf,0,buf2,0,buf.length); buf=buf2; }
- private void shiftb() { System.arraycopy(buf, start, buf, 0, end-start); end -= start; start = 0; }
- private void ensureb(int space) { if (end-start+space>buf.length) growb(space); if (end+space>buf.length) shiftb(); }
- private void ensureb2(int space) { if (end-start+space>buf.length) growb(space); if (start<space) unshiftb(); }
- private void unshiftb() {
- System.arraycopy(buf,start,buf,buf.length-(end-start),end-start);start=buf.length-(end-start);end=buf.length; }
-
- public void unread(String s) { ensurec(s.length()); s.getChars(0, s.length(), cbuf, cend); cend += s.length(); }
+ if (close) out.close();
+ }
- private void flushchars() {
- try {
- flushing = true;
- for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(10);
- if (cend>cstart)
- unreader.write(cbuf, cstart, cend-cstart);
- cstart = cend = 0;
- unreader.flush();
- } catch (IOException e) { ioe(e);
- } finally { flushing = false; }
+ public void transcribe(StringBuffer out) {
+ char[] buf = new char[1024];
+ while(true) {
+ int numread = in.readChars(buf, 0, buf.length);
+ if (numread==-1) { in.close(); return; }
+ out.append(buf, 0, numread);
}
+ }
- Writer unreader = new OutputStreamWriter(new InOutputStream());
- private class InOutputStream extends OutputStream {
- public void close() { }
- public void write(int i) throws IOException { byte[] b = new byte[1]; b[0] = (byte)i; write(b, 0, 1); }
- public void write(byte[] b) throws IOException { write(b, 0, b.length); }
- public void write(byte[] b, int p, int l) {
- ensureb2(l);
- System.arraycopy(b, p, buf, start-l, l);
- start -= l;
- }
- }
+ public static int countLines(Stream s) {
+ int ret = 0;
+ while(s.readln() != null) ret++;
+ s.close();
+ return ret;
}
- public static interface Transformer {
- public Stream transform(Stream in);
+ // FIXME: ugly
+ public static int countBytes(Stream s) {
+ int ret = 0;
+ while(s.in.read() != -1) ret++;
+ s.close();
+ return ret;
}
+ // Exceptions //////////////////////////////////////////////////////////////////////////////
+
+ static int ioe(IOException e) {
+ if (e instanceof SocketException && e.toString().indexOf("Connection reset")!=-1)
+ throw new Closed(e.getMessage());
+ throw new StreamException(e);
+ }
+ public static class StreamException extends RuntimeException {
+ public StreamException(Exception e) { super(e); }
+ public StreamException(String s) { super(s); }
+ }
+ public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
+ public static class Closed extends StreamException { public Closed(String s) { super(s); } }
}
projects / org.ibex.io.git / blobdiff