b5240743e9
- Major overhaul of the source code to make maintenance and support for new compression formats easier. - Use "liblzma" instead of "xzcat" for dealing with LZMA compressed RPMs.
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matthias Scheler.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define FILEIO_INTERNAL /**/
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#include "fileio.h"
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#include <bzlib.h>
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#include <stdio.h>
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#include <stdlib.h>
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typedef struct {
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FILE *id_File;
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int id_bzerror;
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BZFILE *id_BZFile;
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} InstData;
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static void
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BZLibCloseFunc(FileHandle *fh)
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{
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InstData *id;
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id = fh->fh_InstData;
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if (id->id_BZFile != NULL)
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(void)BZ2_bzReadClose(&id->id_bzerror, id->id_BZFile);
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if (id->id_File != NULL)
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(void)fclose(id->id_File);
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}
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static ssize_t
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BZLibReadFunc(FileHandle *fh, void *buffer, size_t bytes)
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{
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InstData *id;
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int rbytes;
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id = fh->fh_InstData;
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rbytes = BZ2_bzRead(&id->id_bzerror, id->id_BZFile, buffer, bytes);
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switch (id->id_bzerror) {
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case BZ_OK:
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case BZ_STREAM_END:
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return rbytes;
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default:
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return -1;
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}
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}
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FileHandle *
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FileHandleBZLib(int *fd_p)
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{
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FileHandle *fh;
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InstData *id;
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fh = FileHandleCreate(BZLibCloseFunc, BZLibReadFunc, sizeof(*id));
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if (fh == NULL)
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return NULL;
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id = fh->fh_InstData;
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if ((id->id_File = fdopen(*fd_p, "rb")) == NULL) {
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FileHandleClose(fh);
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return NULL;
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}
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*fd_p = -1;
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if ((id->id_BZFile = BZ2_bzReadOpen(&id->id_bzerror, id->id_File, 0, 0,
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NULL, 0)) == NULL) {
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FileHandleClose(fh);
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return NULL;
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}
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return fh;
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}
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