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 String newLine = "\r\n";
19 private Stream in_next = null;
21 public Stream append(String in_next) { return appendStream(new Stream(in_next)); }
22 public Stream appendStream(Stream in_next) {
23 if (this.in_next != null)
24 this.in_next.appendStream(in_next);
26 this.in_next = in_next;
30 public void transcribe(Stream out) { transcribe(out, false); }
31 public void transcribe(Stream out, boolean close) {
33 byte[] buf = new byte[1024];
35 int numread = in.read(buf, 0, buf.length);
36 if (numread==-1) { in.close(); break; }
37 out.out.write(buf, 0, numread);
39 if (close) out.close();
40 } catch (IOException ioe) { ioe(ioe); }
43 public void transcribe(StringBuffer out) {
45 char[] buf = new char[1024];
47 int numread = in.read(buf, 0, buf.length);
48 if (numread==-1) { in.close(); return; }
49 out.append(buf, 0, numread);
51 //} catch (IOException ioe) { ioe(ioe); }
54 public static int countLines(Stream s) {
56 while(s.readln() != null) ret++;
61 public Stream(byte[] b, int off, int len) { this.in = new Stream.In(new ByteArrayInputStream(b, off, len)); this.out=null; }
62 public Stream(InputStream in) { this.in = new Stream.In(in); this.out = null; }
63 public Stream( OutputStream out) { this.in = null; this.out = new Stream.Out(out); }
64 public Stream(InputStream in, OutputStream out) { this.in = new Stream.In(in); this.out = new Stream.Out(out); }
65 public Stream(String s) { this(new ByteArrayInputStream(s.getBytes())); }
66 public Stream(File f) {
67 try { this.in = new Stream.In(new FileInputStream(f)); } catch (IOException e) { ioe(e); throw new Error(); }
70 public Stream(Socket s) {
71 try { this.in = new Stream.In(s.getInputStream()); } catch (IOException e) { ioe(e); throw new Error(); }
72 try { this.out = new Stream.Out(s.getOutputStream()); } catch (IOException e) { ioe(e); throw new Error(); }
75 static int ioe(IOException e) {
76 if (e instanceof SocketException && e.toString().indexOf("Connection reset")!=-1)
77 throw new Closed(e.getMessage());
78 throw new StreamException(e);
80 public static class StreamException extends RuntimeException {
81 public StreamException(Exception e) { super(e); }
82 public StreamException(String s) { super(s); }
84 public static class EOF extends StreamException { public EOF() { super("End of stream"); } }
85 public static class Closed extends StreamException { public Closed(String s) { super(s); } }
94 char ret = in.getc(false);
97 public String readln() {
99 String s = in.readln();
103 public void print(String s) {
107 public void println(String s) {
112 public void flush() {
113 if (out != null) try { out.w.flush(); } catch(IOException e) { ioe(e); }
115 public int read(byte[] b, int off, int len) {
117 int ret = in.readBytes(b, off, len);
121 public int read(char[] c, int off, int len) {
123 int ret = in.read(c, off, len);
127 public void unread(String s) { in.unread(s); }
129 /** should not throw exceptions */
130 public void close() { try { if (in!=null) in.close(); } finally { if (out!=null) out.close(); } }
131 public void setNewline(String s) { newLine = s; }
134 /** dumps the connection log into a file */
135 private boolean nnl = false;
137 private static class Out extends BufferedOutputStream {
138 private Writer w = new BufferedWriter(new OutputStreamWriter(this));
139 public Out(OutputStream out) { super(out); }
140 public void close() { try { super.close(); } catch (Exception e) { Log.error(this, e); } }
141 public void write(String s) { try { w.write(s); } catch (IOException e) { ioe(e); } }
144 private class In extends InputStream {
145 public final Reader reader = new InputStreamReader(this);
146 private /*final*/ InputStream orig;
147 public In(InputStream in) { orig = in; }
149 char[] cbuf = new char[8192];
153 byte[] buf = new byte[8192];
157 boolean flushing = false;
159 public int available() { return flushing ? 0 : (end - start); }
160 public void close() { try {
161 if (orig!=null) orig.close();
162 if (in_next != null) in_next.close(); // FIXME: correct?
163 } 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);
172 if (in_next == null) throw new EOF();
176 return peek ? cbuf[cstart] : cbuf[cstart++];
177 } catch (IOException e) { return (char)ioe(e); } }
179 public String readln() { try {
181 for(int i=cstart; i<cend; i++)
182 if (cbuf[i] == '\n') {
183 // this should (in theory) handle CR, LF,
184 // CRLF, and LFCR properly, assuming that the
185 // file consistently uses the same ending
190 if (cbuf[begin] == '\r') { begin++; len--; }
191 while (len > 0 && cbuf[begin+len-1] == '\r') { len--; }
192 return new String(cbuf, begin, len);
195 int numread = reader.read(cbuf, cend, cbuf.length - cend);
198 if (cstart == cend) return null;
199 String ret = new String(cbuf, cstart, cend-cstart);
205 } catch (IOException e) { ioe(e); return null; } }
207 public int read(char[] c, int pos, int len) { try {
208 if (cstart == cend) {
210 cend = reader.read(cbuf, 0, cbuf.length);
211 if (cend == -1) { reader.close(); cend = cstart; return -1; }
213 if (len > cend - cstart) len = cend - cstart;
214 System.arraycopy(cbuf, cstart, c, pos, len);
217 } catch (IOException e) { ioe(e); return -1; } }
219 public int readBytes(byte[] b, int pos, int len) { flushchars(); return read(b, pos, len); }
220 public int read() { byte[] b = new byte[1]; if (read(b, 0, 1) == -1) return -1; return (int)b[0]; }
221 public int read(byte[] b, int pos, int len) { try {
224 end = orig.read(buf, 0, buf.length);
228 if (in_next==null) return -1;
229 return in_next.read(b, pos, len);
232 if (len > end - start) len = end - start;
233 System.arraycopy(buf, start, b, pos, len);
236 } catch (IOException e) { ioe(e); return -1; } }
238 private void growc(int s){char[] cbuf2=new char[cbuf.length+s*2];System.arraycopy(cbuf,0,cbuf2,0,cbuf.length);cbuf=cbuf2; }
239 private void shiftc() {
240 char[] cbuf2 = new char[cbuf.length];
241 System.arraycopy(cbuf, cstart, cbuf2, 0, cend-cstart);
246 private void ensurec(int space) { if (cend-cstart+space>cbuf.length) growc(space); if (cend+space>cbuf.length) shiftc(); }
248 private void growb(int s) { byte[] buf2 = new byte[buf.length+s*2]; System.arraycopy(buf,0,buf2,0,buf.length); buf=buf2; }
249 private void shiftb() { System.arraycopy(buf, start, buf, 0, end-start); end -= start; start = 0; }
250 private void ensureb(int space) { if (end-start+space>buf.length) growb(space); if (end+space>buf.length) shiftb(); }
251 private void ensureb2(int space) { if (end-start+space>buf.length) growb(space); if (start<space) unshiftb(); }
252 private void unshiftb() {
253 System.arraycopy(buf,start,buf,buf.length-(end-start),end-start);start=buf.length-(end-start);end=buf.length; }
255 public void unread(String s) { ensurec(s.length()); s.getChars(0, s.length(), cbuf, cend); cend += s.length(); }
257 private void flushchars() {
260 for(; reader.ready(); reader.read(cbuf, cend++, 1)) ensurec(10);
262 unreader.write(cbuf, cstart, cend-cstart);
265 } catch (IOException e) { ioe(e);
266 } finally { flushing = false; }
269 Writer unreader = new OutputStreamWriter(new InOutputStream());
270 private class InOutputStream extends OutputStream {
271 public void close() { }
272 public void write(int i) throws IOException { byte[] b = new byte[1]; b[0] = (byte)i; write(b, 0, 1); }
273 public void write(byte[] b) throws IOException { write(b, 0, b.length); }
274 public void write(byte[] b, int p, int l) {
276 System.arraycopy(b, p, buf, start-l, l);