/* -*- c-file-style: "java"; indent-tabs-mode: nil -*- * * distcc -- A simple distributed compiler system * $Header: /cvs/karma/distcc/src/zip.c,v 1.1.1.1 2005/05/06 05:09:42 deatley Exp $ * * Copyright (C) 2002 by Martin Pool <mbp@samba.org> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ /* Perfection is acheived only on the point of collapse. * -- C. N. Parkinson */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <assert.h> #include <string.h> #include <fcntl.h> #include <errno.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/wait.h> #include <zlib.h> #include "distcc.h" #include "trace.h" #include "io.h" #include "rpc.h" #include "exitcode.h" /** * @file * * Support for zlib compression in distcc. * * Use of compression is enabled by a special "GZIP" token in the * protocol stream; after that all file bodies are transferred with * compression rather than through the usual means. * * As for the uncompressed case, files are preceeded by an identifying * token (e.g. "DOTI"), and then their length. The length is the wire * (i.e. compressed) length. * * Transmitting the length first keeps the read process fairly simple, * but it means that we must do all compression in memory first before * beginning to send the file. * * zlib.h says that to do all compression in a single step, the output * buffer must be at least 0.1% larger than avail_in plus 12 bytes. * In this case, we expect to see Z_FINISH set on the first call to * deflate(). * * These methods more or less parallel those in bulk.c. **/ /** * Send a file, compressed. **/ int dcc_x_file_gz(int ofd, const char *fname, const char *token, size_t *size_out) { z_stream strm; /* use default allocator */ strm.zalloc = Z_NULL; strm.zfree = Z_NULL; strm.opaque = Z_NULL; deflateInit(&strm, 3); deflate(Z_FINISH); deflateEnd(); }