1 // Copyright 2004 Adam Megacz, see the COPYING file for licensing [LGPL]
6 import java.util.zip.*;
7 import org.ibex.util.*;
9 /** plays the role of InputStream, OutputStream, Reader and Writer, with logging and unchecked exceptions */
12 protected final In in;
13 protected final Out out;
14 private StringBuffer log = loggingEnabled ? new StringBuffer(16 * 1024) : null;
15 private String newLine = "\r\n";
17 public static boolean loggingEnabled = System.getProperty("ibex.io.stream.logEnabled", "true") != null;
19 public Stream(InputStream in) { this.in = new Stream.In(in); this.out = null; }
20 public Stream( OutputStream out) { this.in = null; this.out = new Stream.Out(out); }
21 public Stream(InputStream in, OutputStream out) { this.in = new Stream.In(in); this.out = new Stream.Out(out); }
22 public Stream(String s) { this(new ByteArrayInputStream(s.getBytes())); }
23 public Stream(Socket s) {
24 try { this.in = new Stream.In(s.getInputStream()); } catch (IOException e) { throw new StreamException(e); }
25 try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { throw new StreamException(e); }
28 private static int ioe(Exception e) { throw new StreamException(e); }
29 public static class StreamException extends RuntimeException {
30 public StreamException(Exception e) { super(e); }
31 public StreamException(String s) { super(s); }
33 public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
34 public static class Closed extends StreamException { public Closed(String s) { super(s); } }
37 public char peekc() { flush(); return in.getc(true); }
38 public char getc() { flush(); char ret = in.getc(false); log(ret); return ret; }
39 public String readln() { flush(); String s = in.readln(); log(s); log('\n'); return s; }
40 public int read(byte[] b, int off, int len) {
42 int ret = in.readBytes(b, off, len);
43 if (log != null) log("\n[read " + ret + " bytes of binary data ]\n");
47 public int read(char[] c, int off, int len) {
49 int ret = in.read(c, off, len);
50 if (log != null && ret != -1) log(new String(c, off, ret));
54 public void unread(String s) { in.unread(s); }
56 public void println() { println(""); }
57 public void println(String s) { logWrite(s); out.write(s); out.write(newLine); flush(); }
59 public void flush() { if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); } }
60 public void close() { in.close(); out.close(); }
61 public void setNewline(String s) { newLine = s; }
64 /** dumps the connection log into a file */
65 public String dumpLog() { String ret = log.toString(); log = new StringBuffer(16 * 1024); return ret; }
66 private void log(String s) { if(log==null) return; if (!nnl) Log.note("\n[read ] "); Log.note(s + "\n"); nnl=false; }
67 private void logWrite(String s) { if(log==null) return; if (nnl) Log.note("\n"); Log.note("[write] "+s+"\n"); nnl=false; }
68 private void log(char c) { if(log==null) return; if (c == '\r') return; if (!nnl) Log.note("[read ] "); Log.note(c+""); nnl = c != '\n'; }
69 private boolean nnl = false;
71 private static class Out extends BufferedOutputStream {
72 private Writer w = new BufferedWriter(new OutputStreamWriter(this));
73 public Out(OutputStream out) { super(out); }
74 public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
75 public void write(String s) { try { w.write(s); } catch (IOException e) { ioe(e); } }
78 private static class In extends InputStream {
79 public Reader reader = new InputStreamReader(this);
80 private final InputStream orig;
81 public In(InputStream in) { orig = in; }
83 char[] cbuf = new char[8192];
87 byte[] buf = new byte[8192];
91 boolean flushing = false;
93 public int available() { return flushing ? 0 : (end - start); }
94 public void close() { try { orig.close(); } catch (Exception e) { Log.error(this, e); } }
96 public char getc(boolean peek) { try {
99 cend = reader.read(cbuf, 0, cbuf.length);
100 if (cend == -1) { cend = cstart; throw new EOF(); }
102 return peek ? cbuf[cstart] : cbuf[cstart++];
103 } catch (IOException e) { return (char)ioe(e); } }
105 public String readln() { try {
107 for(int i=cstart; i<cend; i++)
108 if (cbuf[i] == '\n') {
109 // this should (in theory) handle CR, LF,
110 // CRLF, and LFCR properly, assuming that the
111 // file consistently uses the same ending
116 if (cbuf[begin] == '\r') { begin++; len--; }
117 if (len > 0 && cbuf[begin+len-1] == '\r') { len--; }
118 return new String(cbuf, begin, len);
121 int numread = reader.read(cbuf, cend, cbuf.length - cend);
123 if (cstart == cend) return null;
124 String ret = new String(cbuf, cstart, cend-cstart);
130 } catch (IOException e) { ioe(e); return null; } }
132 public int read(char[] c, int pos, int len) { try {
133 if (cstart == cend) {
135 cend = reader.read(cbuf, 0, cbuf.length);
136 if (cend == -1) { cend = cstart; return -1; }
138 if (len > cend - cstart) len = cend - cstart;
139 System.arraycopy(cbuf, cstart, c, pos, len);
142 } catch (IOException e) { ioe(e); return -1; } }
144 public int readBytes(byte[] b, int pos, int len) { flushchars(); return read(b, pos, len); }
145 public int read() { byte[] b = new byte[1]; if (read(b, 0, 1) == -1) return -1; return (int)b[0]; }
146 public int read(byte[] b, int pos, int len) { try {
149 end = orig.read(buf, 0, buf.length);
150 if (end == -1) { end = start; return -1; }
152 if (len > end - start) len = end - start;
153 System.arraycopy(buf, start, b, pos, len);
156 } catch (IOException e) { ioe(e); return -1; } }
158 private void growc(int s){char[] cbuf2=new char[cbuf.length+s*2];System.arraycopy(cbuf,0,cbuf2,0,cbuf.length);cbuf=cbuf2; }
159 private void shiftc() {
160 char[] cbuf2 = new char[cbuf.length];
161 System.arraycopy(cbuf, cstart, cbuf2, 0, cend-cstart);
166 private void ensurec(int space) { if (cend-cstart+space>cbuf.length) growc(space); if (cend+space>cbuf.length) shiftc(); }
168 private void growb(int s) { byte[] buf2 = new byte[buf.length+s*2]; System.arraycopy(buf,0,buf2,0,buf.length); buf=buf2; }
169 private void shiftb() { System.arraycopy(buf, start, buf, 0, end-start); end -= start; start = 0; }
170 private void ensureb(int space) { if (end-start+space>buf.length) growb(space); if (end+space>buf.length) shiftb(); }
171 private void ensureb2(int space) { if (end-start+space>buf.length) growb(space); if (start<space) unshiftb(); }
172 private void unshiftb() {
173 System.arraycopy(buf,start,buf,buf.length-(end-start),end-start);start=buf.length-(end-start);end=buf.length; }
175 public void unread(String s) { ensurec(s.length()); s.getChars(0, s.length(), cbuf, cend); cend += s.length(); }
177 private void flushchars() {
180 for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(1);
181 unreader.write(cbuf, cstart, cend);
184 } catch (IOException e) { ioe(e);
185 } finally { flushing = false; }
188 Writer unreader = new OutputStreamWriter(new OutputStream() {
189 public void close() { }
190 public void write(int i) throws IOException { byte[] b = new byte[1]; b[0] = (byte)i; write(b, 0, 1); }
191 public void write(byte[] b) throws IOException { write(b, 0, b.length); }
192 public void write(byte[] b, int p, int l) {
194 System.arraycopy(b, p, buf, start-l, l);