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https://github.com/fadden/ciderpress.git
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51b5f00f5c
CiderPress and MDC now compile, and execute far enough to open their respective "about" boxes, but I doubt they'll do much more than that. * Switch from MBCS to UNICODE APIs Microsoft switched to UTF-16 (by way of UCS-2) a long time ago, and the support for MBCS seems to be getting phased out. So it's time to switch to wide strings. This is a bit awkward for CiderPress because it works with disk and file archives with 8-bit filenames, and I want NufxLib and DiskImgLib to continue to work on Linux (which has largely taken the UTF-8 approach to Unicode). The libraries will continue to work with 8-bit filenames, with CiderPress/MDC doing the conversion at the appropriate point. There were a couple of places where strings from a structure handed back by one of the libraries were used directly in the UI, or vice-versa, which is a problem because we have nowhere to store the result of the conversion. These currently have fixed place-holder "xyzzy" strings. All UI strings are now wide. Various format strings now use "%ls" and "%hs" to explicitly specify wide and narrow. This doesn't play well with gcc, so only the Windows-specific parts use those. * Various updates to vcxproj files The project-file conversion had some cruft that is now largely gone. The build now has a common output directory for the EXEs and libraries, avoiding the old post-build copy steps. * Added zlib 1.2.8 and nufxlib 2.2.2 source snapshots The old "prebuilts" directory is now gone. The libraries are now built as part of building the apps. I added a minimal set of files for zlib, and a full set for nufxlib. The Linux-specific nufxlib goodies are included for the benefit of the Linux utilities, which are currently broken (don't build). * Replace symbols used for include guards Symbols with a leading "__" are reserved.
300 lines
8.7 KiB
C
300 lines
8.7 KiB
C
/*
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* NuFX archive manipulation library
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* Copyright (C) 2000-2007 by Andy McFadden, All Rights Reserved.
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* This is free software; you can redistribute it and/or modify it under the
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* terms of the BSD License, see the file COPYING-LIB.
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*
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* Support for the "bzip2" (BTW+Huffman) algorithm, via "libbz2".
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*
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* This compression format is totally unsupported on the Apple II. This
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* is provided primarily for the benefit of Apple II emulators that want
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* a better storage format for disk images than SHK+LZW or a ZIP file.
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*
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* This code was developed and tested with libz2 version 1.0.2. Visit
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* http://sources.redhat.com/bzip2/ for more information.
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*/
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#include "NufxLibPriv.h"
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#ifdef ENABLE_BZIP2
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#include "bzlib.h"
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#define kBZBlockSize 8 /* use 800K blocks */
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#define kBZVerbosity 1 /* library verbosity level (0-4) */
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/*
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* Alloc and free functions provided to libbz2.
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*/
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static void*
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Nu_bzalloc(void* opaque, int items, int size)
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{
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return Nu_Malloc(opaque, items * size);
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}
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static void
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Nu_bzfree(void* opaque, void* address)
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{
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Nu_Free(opaque, address);
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}
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/*
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* ===========================================================================
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* Compression
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* ===========================================================================
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*/
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/*
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* Compress "srcLen" bytes from "pStraw" to "fp".
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*/
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NuError
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Nu_CompressBzip2(NuArchive* pArchive, NuStraw* pStraw, FILE* fp,
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ulong srcLen, ulong* pDstLen, ushort* pCrc)
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{
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NuError err = kNuErrNone;
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bz_stream bzstream;
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int bzerr;
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uchar* outbuf = nil;
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Assert(pArchive != nil);
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Assert(pStraw != nil);
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Assert(fp != nil);
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Assert(srcLen > 0);
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Assert(pDstLen != nil);
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Assert(pCrc != nil);
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err = Nu_AllocCompressionBufferIFN(pArchive);
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if (err != kNuErrNone)
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return err;
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/* allocate a similarly-sized buffer for the output */
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outbuf = Nu_Malloc(pArchive, kNuGenCompBufSize);
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BailAlloc(outbuf);
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/*
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* Initialize the bz2lib stream.
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*/
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bzstream.bzalloc = Nu_bzalloc;
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bzstream.bzfree = Nu_bzfree;
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bzstream.opaque = pArchive;
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bzstream.next_in = nil;
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bzstream.avail_in = 0;
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bzstream.next_out = outbuf;
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bzstream.avail_out = kNuGenCompBufSize;
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/* fourth arg is "workFactor"; set to zero for default (30) */
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bzerr = BZ2_bzCompressInit(&bzstream, kBZBlockSize, kBZVerbosity, 0);
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if (bzerr != BZ_OK) {
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err = kNuErrInternal;
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if (bzerr == BZ_CONFIG_ERROR) {
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Nu_ReportError(NU_BLOB, err, "error configuring bz2lib");
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} else {
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Nu_ReportError(NU_BLOB, err,
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"call to BZ2_bzCompressInit failed (bzerr=%d)", bzerr);
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}
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goto bail;
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}
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/*
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* Loop while we have data.
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*/
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do {
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ulong getSize;
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int action;
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/* should be able to read a full buffer every time */
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if (bzstream.avail_in == 0 && srcLen) {
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getSize = (srcLen > kNuGenCompBufSize) ? kNuGenCompBufSize : srcLen;
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DBUG(("+++ reading %ld bytes\n", getSize));
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err = Nu_StrawRead(pArchive, pStraw, pArchive->compBuf, getSize);
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if (err != kNuErrNone) {
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Nu_ReportError(NU_BLOB, err, "bzip2 read failed");
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goto bz_bail;
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}
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srcLen -= getSize;
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*pCrc = Nu_CalcCRC16(*pCrc, pArchive->compBuf, getSize);
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bzstream.next_in = pArchive->compBuf;
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bzstream.avail_in = getSize;
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}
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if (srcLen == 0)
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action = BZ_FINISH; /* tell libbz2 that we're done */
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else
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action = BZ_RUN; /* more to come! */
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bzerr = BZ2_bzCompress(&bzstream, action);
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if (bzerr != BZ_RUN_OK && bzerr != BZ_FINISH_OK && bzerr != BZ_STREAM_END)
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{
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err = kNuErrInternal;
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Nu_ReportError(NU_BLOB, err,
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"libbz2 compress call failed (bzerr=%d)", bzerr);
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goto bz_bail;
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}
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/* write when we're full or when we're done */
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if (bzstream.avail_out == 0 ||
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(bzerr == BZ_STREAM_END && bzstream.avail_out != kNuGenCompBufSize))
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{
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DBUG(("+++ writing %d bytes\n",
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(uchar*)bzstream.next_out - outbuf));
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err = Nu_FWrite(fp, outbuf, (uchar*)bzstream.next_out - outbuf);
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if (err != kNuErrNone) {
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Nu_ReportError(NU_BLOB, err, "fwrite failed in bzip2");
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goto bz_bail;
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}
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bzstream.next_out = outbuf;
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bzstream.avail_out = kNuGenCompBufSize;
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}
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} while (bzerr != BZ_STREAM_END);
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*pDstLen = bzstream.total_out_lo32;
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Assert(bzstream.total_out_hi32 == 0); /* no huge files for us */
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bz_bail:
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BZ2_bzCompressEnd(&bzstream); /* free up any allocated structures */
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bail:
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if (outbuf != nil)
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free(outbuf);
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return err;
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}
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/*
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* ===========================================================================
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* Expansion
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* ===========================================================================
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*/
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/*
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* Expand from "infp" to "pFunnel".
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*/
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NuError
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Nu_ExpandBzip2(NuArchive* pArchive, const NuRecord* pRecord,
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const NuThread* pThread, FILE* infp, NuFunnel* pFunnel, ushort* pCrc)
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{
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NuError err = kNuErrNone;
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bz_stream bzstream;
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int bzerr;
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ulong compRemaining;
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uchar* outbuf;
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Assert(pArchive != nil);
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Assert(pThread != nil);
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Assert(infp != nil);
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Assert(pFunnel != nil);
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err = Nu_AllocCompressionBufferIFN(pArchive);
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if (err != kNuErrNone)
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return err;
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/* allocate a similarly-sized buffer for the output */
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outbuf = Nu_Malloc(pArchive, kNuGenCompBufSize);
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BailAlloc(outbuf);
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compRemaining = pThread->thCompThreadEOF;
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/*
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* Initialize the libbz2 stream.
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*/
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bzstream.bzalloc = Nu_bzalloc;
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bzstream.bzfree = Nu_bzfree;
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bzstream.opaque = pArchive;
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bzstream.next_in = nil;
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bzstream.avail_in = 0;
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bzstream.next_out = outbuf;
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bzstream.avail_out = kNuGenCompBufSize;
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/* third arg is "small" (set nonzero to reduce mem) */
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bzerr = BZ2_bzDecompressInit(&bzstream, kBZVerbosity, 0);
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if (bzerr != BZ_OK) {
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err = kNuErrInternal;
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if (bzerr == BZ_CONFIG_ERROR) {
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Nu_ReportError(NU_BLOB, err, "error configuring libbz2");
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} else {
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Nu_ReportError(NU_BLOB, err,
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"call to BZ2_bzDecompressInit failed (bzerr=%d)", bzerr);
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}
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goto bail;
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}
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/*
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* Loop while we have data.
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*/
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do {
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ulong getSize;
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/* read as much as we can */
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if (bzstream.avail_in == 0) {
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getSize = (compRemaining > kNuGenCompBufSize) ?
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kNuGenCompBufSize : compRemaining;
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DBUG(("+++ reading %ld bytes (%ld left)\n", getSize,
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compRemaining));
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err = Nu_FRead(infp, pArchive->compBuf, getSize);
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if (err != kNuErrNone) {
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Nu_ReportError(NU_BLOB, err, "bzip2 read failed");
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goto bz_bail;
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}
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compRemaining -= getSize;
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bzstream.next_in = pArchive->compBuf;
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bzstream.avail_in = getSize;
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}
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/* uncompress the data */
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bzerr = BZ2_bzDecompress(&bzstream);
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if (bzerr != BZ_OK && bzerr != BZ_STREAM_END) {
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err = kNuErrInternal;
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Nu_ReportError(NU_BLOB, err,
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"libbz2 decompress call failed (bzerr=%d)", bzerr);
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goto bz_bail;
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}
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/* write every time there's anything (buffer will usually be full) */
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if (bzstream.avail_out != kNuGenCompBufSize) {
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DBUG(("+++ writing %d bytes\n",(uchar*)bzstream.next_out - outbuf));
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err = Nu_FunnelWrite(pArchive, pFunnel, outbuf,
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(uchar*)bzstream.next_out - outbuf);
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if (err != kNuErrNone) {
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Nu_ReportError(NU_BLOB, err, "write failed in bzip2");
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goto bz_bail;
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}
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if (pCrc != nil)
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*pCrc = Nu_CalcCRC16(*pCrc, outbuf,
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(uchar*) bzstream.next_out - outbuf);
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bzstream.next_out = outbuf;
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bzstream.avail_out = kNuGenCompBufSize;
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}
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} while (bzerr == BZ_OK);
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Assert(bzerr == BZ_STREAM_END); /* other errors should've been caught */
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Assert(bzstream.total_out_hi32 == 0); /* no huge files for us */
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if (bzstream.total_out_lo32 != pThread->actualThreadEOF) {
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err = kNuErrBadData;
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Nu_ReportError(NU_BLOB, err,
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"size mismatch on expanded bzip2 file (%d vs %ld)",
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bzstream.total_out_lo32, pThread->actualThreadEOF);
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goto bz_bail;
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}
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bz_bail:
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BZ2_bzDecompressEnd(&bzstream); /* free up any allocated structures */
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bail:
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if (outbuf != nil)
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free(outbuf);
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return err;
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}
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#endif /*ENABLE_BZIP2*/
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