From 2410963e8cc6272022c0a556a3fd3c9a3bd617e9 Mon Sep 17 00:00:00 2001 From: Bruce Momjian Date: Tue, 13 Feb 2001 16:18:15 +0000 Subject: Remove postgresql jdbc files, per Peter. --- src/interfaces/jdbc/postgresql/PG_Stream.java | 384 -------------------------- 1 file changed, 384 deletions(-) delete mode 100644 src/interfaces/jdbc/postgresql/PG_Stream.java (limited to 'src/interfaces/jdbc/postgresql/PG_Stream.java') diff --git a/src/interfaces/jdbc/postgresql/PG_Stream.java b/src/interfaces/jdbc/postgresql/PG_Stream.java deleted file mode 100644 index d5816b634c9..00000000000 --- a/src/interfaces/jdbc/postgresql/PG_Stream.java +++ /dev/null @@ -1,384 +0,0 @@ -package postgresql; - -import java.io.*; -import java.lang.*; -import java.net.*; -import java.util.*; -import java.sql.*; -import postgresql.*; -import postgresql.util.*; - -/** - * @version 1.0 15-APR-1997 - * - * This class is used by Connection & PGlobj for communicating with the - * backend. - * - * @see java.sql.Connection - */ -// This class handles all the Streamed I/O for a postgresql connection -public class PG_Stream -{ - private Socket connection; - private InputStream pg_input; - private BufferedOutputStream pg_output; - - /** - * Constructor: Connect to the PostgreSQL back end and return - * a stream connection. - * - * @param host the hostname to connect to - * @param port the port number that the postmaster is sitting on - * @exception IOException if an IOException occurs below it. - */ - public PG_Stream(String host, int port) throws IOException - { - connection = new Socket(host, port); - - // Submitted by Jason Venner adds a 10x speed - // improvement on FreeBSD machines (caused by a bug in their TCP Stack) - connection.setTcpNoDelay(true); - - // Buffer sizes submitted by Sverre H Huseby - pg_input = new BufferedInputStream(connection.getInputStream(), 8192); - pg_output = new BufferedOutputStream(connection.getOutputStream(), 8192); - } - - /** - * Sends a single character to the back end - * - * @param val the character to be sent - * @exception IOException if an I/O error occurs - */ - public void SendChar(int val) throws IOException - { - // Original code - //byte b[] = new byte[1]; - //b[0] = (byte)val; - //pg_output.write(b); - - // Optimised version by Sverre H. Huseby Aug 22 1999 Applied Sep 13 1999 - pg_output.write((byte)val); - } - - /** - * Sends an integer to the back end - * - * @param val the integer to be sent - * @param siz the length of the integer in bytes (size of structure) - * @exception IOException if an I/O error occurs - */ - public void SendInteger(int val, int siz) throws IOException - { - byte[] buf = new byte[siz]; - - while (siz-- > 0) - { - buf[siz] = (byte)(val & 0xff); - val >>= 8; - } - Send(buf); - } - - /** - * Sends an integer to the back end in reverse order. - * - * This is required when the backend uses the routines in the - * src/backend/libpq/pqcomprim.c module. - * - * As time goes by, this should become obsolete. - * - * @param val the integer to be sent - * @param siz the length of the integer in bytes (size of structure) - * @exception IOException if an I/O error occurs - */ - public void SendIntegerReverse(int val, int siz) throws IOException - { - byte[] buf = new byte[siz]; - int p=0; - while (siz-- > 0) - { - buf[p++] = (byte)(val & 0xff); - val >>= 8; - } - Send(buf); - } - - /** - * Send an array of bytes to the backend - * - * @param buf The array of bytes to be sent - * @exception IOException if an I/O error occurs - */ - public void Send(byte buf[]) throws IOException - { - pg_output.write(buf); - } - - /** - * Send an exact array of bytes to the backend - if the length - * has not been reached, send nulls until it has. - * - * @param buf the array of bytes to be sent - * @param siz the number of bytes to be sent - * @exception IOException if an I/O error occurs - */ - public void Send(byte buf[], int siz) throws IOException - { - Send(buf,0,siz); - } - - /** - * Send an exact array of bytes to the backend - if the length - * has not been reached, send nulls until it has. - * - * @param buf the array of bytes to be sent - * @param off offset in the array to start sending from - * @param siz the number of bytes to be sent - * @exception IOException if an I/O error occurs - */ - public void Send(byte buf[], int off, int siz) throws IOException - { - int i; - - pg_output.write(buf, off, ((buf.length-off) < siz ? (buf.length-off) : siz)); - if((buf.length-off) < siz) - { - for (i = buf.length-off ; i < siz ; ++i) - { - pg_output.write(0); - } - } - } - - /** - * Sends a packet, prefixed with the packet's length - * @param buf buffer to send - * @exception SQLException if an I/O Error returns - */ - public void SendPacket(byte[] buf) throws IOException - { - SendInteger(buf.length+4,4); - Send(buf); - } - - /** - * Receives a single character from the backend - * - * @return the character received - * @exception SQLException if an I/O Error returns - */ - public int ReceiveChar() throws SQLException - { - int c = 0; - - try - { - c = pg_input.read(); - if (c < 0) throw new PSQLException("postgresql.stream.eof"); - } catch (IOException e) { - throw new PSQLException("postgresql.stream.ioerror",e); - } - return c; - } - - /** - * Receives an integer from the backend - * - * @param siz length of the integer in bytes - * @return the integer received from the backend - * @exception SQLException if an I/O error occurs - */ - public int ReceiveInteger(int siz) throws SQLException - { - int n = 0; - - try - { - for (int i = 0 ; i < siz ; i++) - { - int b = pg_input.read(); - - if (b < 0) - throw new PSQLException("postgresql.stream.eof"); - n = n | (b << (8 * i)) ; - } - } catch (IOException e) { - throw new PSQLException("postgresql.stream.ioerror",e); - } - return n; - } - - /** - * Receives an integer from the backend - * - * @param siz length of the integer in bytes - * @return the integer received from the backend - * @exception SQLException if an I/O error occurs - */ - public int ReceiveIntegerR(int siz) throws SQLException - { - int n = 0; - - try - { - for (int i = 0 ; i < siz ; i++) - { - int b = pg_input.read(); - - if (b < 0) - throw new PSQLException("postgresql.stream.eof"); - n = b | (n << 8); - } - } catch (IOException e) { - throw new PSQLException("postgresql.stream.ioerror",e); - } - return n; - } - - /** - * Receives a null-terminated string from the backend. Maximum of - * maxsiz bytes - if we don't see a null, then we assume something - * has gone wrong. - * - * @param maxsiz maximum length of string - * @return string from back end - * @exception SQLException if an I/O error occurs - */ - public String ReceiveString(int maxsiz) throws SQLException - { - byte[] rst = new byte[maxsiz]; - int s = 0; - - try - { - while (s < maxsiz) - { - int c = pg_input.read(); - if (c < 0) - throw new PSQLException("postgresql.stream.eof"); - else if (c == 0) - break; - else - rst[s++] = (byte)c; - } - if (s >= maxsiz) - throw new PSQLException("postgresql.stream.toomuch"); - } catch (IOException e) { - throw new PSQLException("postgresql.stream.ioerror",e); - } - String v = new String(rst, 0, s); - return v; - } - - /** - * Read a tuple from the back end. A tuple is a two dimensional - * array of bytes - * - * @param nf the number of fields expected - * @param bin true if the tuple is a binary tuple - * @return null if the current response has no more tuples, otherwise - * an array of strings - * @exception SQLException if a data I/O error occurs - */ - public byte[][] ReceiveTuple(int nf, boolean bin) throws SQLException - { - int i, bim = (nf + 7)/8; - byte[] bitmask = Receive(bim); - byte[][] answer = new byte[nf][0]; - - int whichbit = 0x80; - int whichbyte = 0; - - for (i = 0 ; i < nf ; ++i) - { - boolean isNull = ((bitmask[whichbyte] & whichbit) == 0); - whichbit >>= 1; - if (whichbit == 0) - { - ++whichbyte; - whichbit = 0x80; - } - if (isNull) - answer[i] = null; - else - { - int len = ReceiveIntegerR(4); - if (!bin) - len -= 4; - if (len < 0) - len = 0; - answer[i] = Receive(len); - } - } - return answer; - } - - /** - * Reads in a given number of bytes from the backend - * - * @param siz number of bytes to read - * @return array of bytes received - * @exception SQLException if a data I/O error occurs - */ - private byte[] Receive(int siz) throws SQLException - { - byte[] answer = new byte[siz]; - Receive(answer,0,siz); - return answer; - } - - /** - * Reads in a given number of bytes from the backend - * - * @param buf buffer to store result - * @param off offset in buffer - * @param siz number of bytes to read - * @exception SQLException if a data I/O error occurs - */ - public void Receive(byte[] b,int off,int siz) throws SQLException - { - int s = 0; - - try - { - while (s < siz) - { - int w = pg_input.read(b, off+s, siz - s); - if (w < 0) - throw new PSQLException("postgresql.stream.eof"); - s += w; - } - } catch (IOException e) { - throw new PSQLException("postgresql.stream.ioerror",e); - } - } - - /** - * This flushes any pending output to the backend. It is used primarily - * by the Fastpath code. - * @exception SQLException if an I/O error occurs - */ - public void flush() throws SQLException - { - try { - pg_output.flush(); - } catch (IOException e) { - throw new PSQLException("postgresql.stream.flush",e); - } - } - - /** - * Closes the connection - * - * @exception IOException if a IO Error occurs - */ - public void close() throws IOException - { - pg_output.write("X\0".getBytes()); - pg_output.flush(); - pg_output.close(); - pg_input.close(); - connection.close(); - } -} -- cgit v1.2.3