suplib/src/GzipError.m3


 Copyright 1996-2003 John D. Polstra.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgment:
 *      This product includes software developed by John D. Polstra.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 

MODULE GzipError;

IMPORT
  Atom, AtomList, Fmt, OSErrorPosix, Ugzip, Uerror;

PROCEDURE FromStatus(status: INTEGER): AtomList.T =
  VAR
    msg: TEXT;
  BEGIN
    CASE status OF
    | Ugzip.Z_STREAM_END =>	msg := "zlib end of stream";
    | Ugzip.Z_NEED_DICT =>	msg := "zlib dictionary needed";
    | Ugzip.Z_STREAM_ERROR =>	msg := "zlib stream error";
    | Ugzip.Z_DATA_ERROR =>	msg := "zlib data error";
    | Ugzip.Z_BUF_ERROR =>	msg := "zlib buffer error";
    | Ugzip.Z_VERSION_ERROR =>	msg := "zlib version mismatch";
    | Ugzip.Z_MEM_ERROR =>
	RETURN AtomList.List1(OSErrorPosix.ErrnoAtom(Uerror.ENOMEM));
    ELSE
      msg := "zlib error " & Fmt.Int(status);
    END;

    RETURN AtomList.List2(OSErrorPosix.ErrnoAtom(Uerror.EIO),
      Atom.FromText(msg));
  END FromStatus;

BEGIN
END GzipError.

interface Uerror is in: