605 lines
12 KiB
Java
605 lines
12 KiB
Java
/*
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* $Id: StdAwk.java,v 1.5 2006-11-26 15:55:43 bacon Exp $
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*/
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package ase.awk;
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import java.io.*;
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public abstract class StdAwk extends Awk
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{
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private InputStreamReader src_in = null;
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private OutputStreamWriter src_out = null;
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private String[] sin = null;
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private int sin_no = 0;
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private String sout = null;
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private String[] cin = null;
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private int cin_no = 0;
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private String[] cout = null;
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private int cout_no = 0;
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public StdAwk () throws Exception
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{
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super ();
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}
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/* == major methods == */
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public void parse () throws Exception
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{
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sin = getSourceNames (); sin_no = 0;
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sout = getDeparsedSourceName ();
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super.parse ();
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}
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public void run () throws Exception
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{
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cin = getInputConsoleNames (); cin_no = 0;
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cout = getOutputConsoleNames (); cout_no = 0;
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super.run ();
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}
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/* == source code names == */
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protected abstract String[] getSourceNames ();
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protected String getDeparsedSourceName () { return null; }
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/* == console names == */
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protected abstract String[] getInputConsoleNames ();
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protected abstract String[] getOutputConsoleNames ();
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/* == source code == */
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protected int openSource (int mode)
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{
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if (mode == SOURCE_READ)
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{
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InputStreamReader isr;
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sin_no = 0;
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if (sin_no >= sin.length) return 0;
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isr = get_input_stream (sin[sin_no]);
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if (isr == null) return -1;
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src_in = isr;
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sin_no++;
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return 1;
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}
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else if (mode == SOURCE_WRITE)
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{
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OutputStreamWriter osw;
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if (sout == null) return 1;
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osw = get_output_stream (sout);
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if (osw == null) return -1;
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src_out = osw;
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return 1;
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}
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return -1;
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}
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protected int closeSource (int mode)
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{
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if (mode == SOURCE_READ)
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{
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try { src_in.close (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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else if (mode == SOURCE_WRITE)
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{
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if (src_out == null) return 0;
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try { src_out.close (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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return -1;
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}
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protected int readSource (char[] buf, int len)
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{
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try {
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int n = src_in.read (buf, 0, len);
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while (n == -1)
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{
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InputStreamReader isr;
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if (sin_no >= sin.length) return 0;
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isr = get_input_stream (sin[sin_no]);
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if (isr == null) return -1;
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try { src_in.close (); }
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catch (IOException ec) { /* ignore */ }
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src_in = isr;
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sin_no++;
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n = src_in.read (buf, 0, len);
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}
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return n;
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}
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catch (IOException e)
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{
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return -1;
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}
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}
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protected int writeSource (char[] buf, int len)
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{
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if (src_out == null) return len;
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try { src_out.write (buf, 0, len); }
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catch (IOException e) { return -1; }
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return len;
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}
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/* == console interface == */
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protected int openConsole (Extio extio)
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{
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System.err.println ("[open_console called.... name: " + extio.getName() + " mode: " + extio.getMode());
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int mode = extio.getMode ();
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if (mode == Extio.MODE_CONSOLE_READ)
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{
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InputStreamReader isr;
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cin_no = 0;
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if (cin_no >= cin.length) return 0;
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isr = get_input_stream (cin[cin_no]);
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if (isr == null) return -1;
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extio.setHandle (isr);
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setInputConsoleName (extio, cin[cin_no]);
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cin_no++;
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return 1;
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}
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else if (mode == Extio.MODE_CONSOLE_WRITE)
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{
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OutputStreamWriter osw;
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cout_no = 0;
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if (cout_no >= cout.length) return 0;
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osw = get_output_stream (cout[cout_no]);
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if (osw == null) return -1;
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extio.setHandle (osw);
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setOutputConsoleName (extio, cout[cout_no]);
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cout_no++;
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return 1;
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}
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return -1;
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}
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protected int closeConsole (Extio extio)
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{
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System.err.println ("[close_console called.... name: " + extio.getName() + " mode: " + extio.getMode());
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int mode = extio.getMode ();
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if (mode == Extio.MODE_CONSOLE_READ)
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{
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InputStreamReader isr = (InputStreamReader)extio.getHandle ();
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try { isr.close (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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else if (mode == Extio.MODE_CONSOLE_WRITE)
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{
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OutputStreamWriter osw = (OutputStreamWriter)extio.getHandle ();
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/* TODO: selective close the stream...
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* system.out should not be closed??? */
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try { osw.close (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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return -1;
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}
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protected int readConsole (Extio extio, char[] buf, int len)
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{
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int mode = extio.getMode ();
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if (mode == Extio.MODE_CONSOLE_READ)
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{
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InputStreamReader isr, tmp;
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int n;
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isr = (InputStreamReader)extio.getHandle ();
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try { n = isr.read (buf, 0, len); }
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catch (IOException e) { return -1; }
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while (n == -1)
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{
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if (cin_no >= cin.length) return 0;
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tmp = get_input_stream (cin[cin_no]);
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if (tmp == null) return -1;
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try { isr.close (); }
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catch (IOException e) { /* ignore */ }
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extio.setHandle (tmp);
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setInputConsoleName (extio, cin[cin_no]);
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isr = (InputStreamReader)extio.getHandle ();
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cin_no++;
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try { n = isr.read (buf, 0, len); }
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catch (IOException e) { return -1; }
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}
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return n;
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}
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return -1;
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}
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protected int writeConsole (Extio extio, char[] buf, int len)
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{
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int mode = extio.getMode ();
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if (mode == Extio.MODE_CONSOLE_WRITE)
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{
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OutputStreamWriter osw;
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osw = (OutputStreamWriter)extio.getHandle ();
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// as the write operation below doesn't indicate
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// if it has reached the end, console can't be
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// switched here unlike read_console.
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try { osw.write (buf, 0, len); osw.flush (); }
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catch (IOException e) { return -1; }
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return len;
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}
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return -1;
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}
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protected int flushConsole (Extio extio)
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{
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int mode = extio.getMode ();
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if (mode == Extio.MODE_CONSOLE_WRITE)
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{
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OutputStreamWriter osw;
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osw = (OutputStreamWriter)extio.getHandle ();
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try { osw.flush (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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return -1;
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}
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protected int nextConsole (Extio extio)
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{
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int mode = extio.getMode ();
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if (mode == Extio.MODE_CONSOLE_READ)
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{
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InputStreamReader isr, tmp;
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isr = (InputStreamReader)extio.getHandle ();
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if (cin_no >= cin.length) return 0;
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tmp = get_input_stream (cin[cin_no]);
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if (tmp == null) return -1;
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try { isr.close (); }
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catch (IOException e) { /* ignore */ }
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extio.setHandle (tmp);
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setInputConsoleName (extio, cin[cin_no]);
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cin_no++;
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return 1;
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}
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else if (mode == Extio.MODE_CONSOLE_WRITE)
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{
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OutputStreamWriter osw, tmp;
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osw = (OutputStreamWriter)extio.getHandle ();
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if (cout_no >= cout.length) return 0;
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tmp = get_output_stream (cout[cout_no]);
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if (tmp == null) return -1;
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/* TODO: selectively close the stream...
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* system.out should not be closed??? */
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try { osw.close (); }
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catch (IOException e) { /* ignore */ }
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extio.setHandle (tmp);
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setOutputConsoleName (extio, cout[cout_no]);
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cout_no++;
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return 1;
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}
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return -1;
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}
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private InputStreamReader get_input_stream (String name)
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{
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InputStreamReader isr;
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if (name == null || name.length() == 0)
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{
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isr = new InputStreamReader (System.in);
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}
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else
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{
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FileInputStream fis;
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try { fis = new FileInputStream (name); }
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catch (IOException e) { return null; }
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isr = new InputStreamReader (fis);
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}
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return isr;
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}
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private OutputStreamWriter get_output_stream (String name)
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{
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OutputStreamWriter osw;
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if (name == null || name.length() == 0)
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{
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osw = new OutputStreamWriter (System.out);
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}
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else
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{
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FileOutputStream fos;
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try { fos = new FileOutputStream (name); }
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catch (IOException e) { return null; }
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osw = new OutputStreamWriter (fos);
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}
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return osw;
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}
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/* == file interface == */
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protected int openFile (Extio extio)
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{
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int mode = extio.getMode();
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if (mode == Extio.MODE_FILE_READ)
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{
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FileInputStream fis;
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InputStreamReader isr;
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try { fis = new FileInputStream (extio.getName()); }
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catch (IOException e) { return -1; }
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isr = new InputStreamReader (fis);
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extio.setHandle (isr);
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return 1;
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}
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else if (mode == Extio.MODE_FILE_WRITE)
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{
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FileOutputStream fos;
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OutputStreamWriter osw;
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try { fos = new FileOutputStream (extio.getName()); }
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catch (IOException e) { return -1; }
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osw = new OutputStreamWriter (fos);
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extio.setHandle (osw);
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return 1;
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}
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else if (mode == Extio.MODE_FILE_APPEND)
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{
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FileOutputStream fos;
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OutputStreamWriter osw;
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try { fos = new FileOutputStream (extio.getName(), true); }
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catch (IOException e) { return -1; }
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osw = new OutputStreamWriter (fos);
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extio.setHandle (osw);
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return 1;
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}
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return -1;
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}
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protected int closeFile (Extio extio)
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{
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int mode = extio.getMode();
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if (mode == Extio.MODE_FILE_READ)
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{
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InputStreamReader isr;
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isr = (InputStreamReader)extio.getHandle();
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try { isr.close (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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else if (mode == Extio.MODE_FILE_WRITE)
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{
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OutputStreamWriter osw;
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osw = (OutputStreamWriter)extio.getHandle();
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try { osw.close (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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else if (mode == Extio.MODE_FILE_APPEND)
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{
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OutputStreamWriter osw;
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osw = (OutputStreamWriter)extio.getHandle();
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try { osw.close (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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return -1;
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}
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protected int readFile (Extio extio, char[] buf, int len)
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{
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int mode = extio.getMode();
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if (mode == Extio.MODE_FILE_READ)
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{
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InputStreamReader isr;
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isr = (InputStreamReader)extio.getHandle();
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try
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{
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len = isr.read (buf, 0, len);
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if (len == -1) len = 0;
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}
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catch (IOException e) { len = -1; }
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return len;
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}
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return -1;
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}
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protected int writeFile (Extio extio, char[] buf, int len)
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{
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int mode = extio.getMode();
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if (mode == Extio.MODE_FILE_WRITE ||
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mode == Extio.MODE_FILE_APPEND)
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{
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OutputStreamWriter osw;
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osw = (OutputStreamWriter)extio.getHandle();
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try { osw.write (buf, 0, len); }
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catch (IOException e) { len = -1; }
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return len;
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}
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return -1;
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}
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protected int flushFile (Extio extio)
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{
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int mode = extio.getMode ();
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if (mode == Extio.MODE_FILE_WRITE ||
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mode == Extio.MODE_FILE_APPEND)
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{
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OutputStreamWriter osw;
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osw = (OutputStreamWriter)extio.getHandle ();
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try { osw.flush (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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return -1;
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}
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/* == pipe interface == */
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protected int openPipe (Extio extio)
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{
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int mode = extio.getMode();
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if (mode == Extio.MODE_PIPE_READ)
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{
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Process proc;
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InputStreamReader isr;
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try { proc = Runtime.getRuntime().exec (extio.getName()); }
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catch (IOException e) { return -1; }
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isr = new InputStreamReader (proc.getInputStream());
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extio.setHandle (isr);
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return 1;
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}
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else if (mode == Extio.MODE_PIPE_WRITE)
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{
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Process proc;
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OutputStreamWriter osw;
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try { proc = Runtime.getRuntime().exec (extio.getName()); }
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catch (IOException e) { return -1; }
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osw = new OutputStreamWriter (proc.getOutputStream());
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extio.setHandle (osw);
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return 1;
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}
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return -1;
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}
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protected int closePipe (Extio extio)
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{
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int mode = extio.getMode();
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if (mode == Extio.MODE_PIPE_READ)
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{
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InputStreamReader isr;
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isr = (InputStreamReader)extio.getHandle();
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try { isr.close (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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else if (mode == Extio.MODE_PIPE_WRITE)
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{
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OutputStreamWriter osw;
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osw = (OutputStreamWriter)extio.getHandle();
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try { osw.close (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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return -1;
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}
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protected int readPipe (Extio extio, char[] buf, int len)
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{
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int mode = extio.getMode();
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if (mode == Extio.MODE_PIPE_READ)
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{
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InputStreamReader isr;
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isr = (InputStreamReader)extio.getHandle();
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try
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{
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len = isr.read (buf, 0, len);
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if (len == -1) len = 0;
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}
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catch (IOException e) { len = -1; }
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return len;
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}
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return -1;
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}
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protected int writePipe (Extio extio, char[] buf, int len)
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{
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int mode = extio.getMode();
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if (mode == Extio.MODE_PIPE_WRITE)
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{
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OutputStreamWriter osw;
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osw = (OutputStreamWriter)extio.getHandle();
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try { osw.write (buf, 0, len); }
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catch (IOException e) { len = -1; }
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return len;
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}
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return -1;
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}
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protected int flushPipe (Extio extio)
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{
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int mode = extio.getMode ();
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if (mode == Extio.MODE_PIPE_WRITE)
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{
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OutputStreamWriter osw;
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osw = (OutputStreamWriter)extio.getHandle ();
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try { osw.flush (); }
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catch (IOException e) { return -1; }
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return 0;
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}
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return -1;
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}
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}
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