mirror of
https://github.com/fadden/ciderpress.git
synced 2024-11-26 02:49:20 +00:00
84706d7ea4
This integrates the latest NufxLib sources, and updates CiderPress to work with the API changes.
686 lines
18 KiB
C
686 lines
18 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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* Recompress records in place, several times, possibly deleting records
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* or threads as we go. The goal is to perform a large number of operations
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* that modify the archive without closing and reopening it.
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*
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* Depending on which #defines are enabled, this can be very destructive,
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* so a copy of the archive is made before processing begins.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "NufxLib.h"
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#include "Common.h"
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/* copy the archive to this file before starting */
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static const char* kWorkFileName = "TwirlCopy678";
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static const char* kTempFileName = "TwirlTmp789";
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/* after loading this much stuff into memory, flush changes */
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const int kMaxHeldLen = 1024 * 1024;
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/*
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* A list of CRCs.
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*/
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typedef struct CRCList {
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int numEntries;
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uint16_t* entries;
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} CRCList;
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/*
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* Returns true if the compression type is supported, false otherwise.
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*/
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int CompressionSupported(NuValue compression)
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{
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int result;
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switch (compression) {
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case kNuCompressNone:
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result = true;
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break;
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case kNuCompressSQ:
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result = (NuTestFeature(kNuFeatureCompressSQ) == kNuErrNone);
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break;
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case kNuCompressLZW1:
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case kNuCompressLZW2:
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result = (NuTestFeature(kNuFeatureCompressLZW) == kNuErrNone);
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break;
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case kNuCompressLZC12:
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case kNuCompressLZC16:
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result = (NuTestFeature(kNuFeatureCompressLZC) == kNuErrNone);
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break;
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case kNuCompressDeflate:
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result = (NuTestFeature(kNuFeatureCompressDeflate) == kNuErrNone);
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break;
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case kNuCompressBzip2:
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result = (NuTestFeature(kNuFeatureCompressBzip2) == kNuErrNone);
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break;
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default:
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assert(false);
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result = false;
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}
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/*printf("Returning %d for %ld\n", result, compression);*/
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return result;
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}
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/*
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* This gets called when a buffer DataSource is no longer needed.
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*/
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NuResult FreeCallback(NuArchive* pArchive, void* args)
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{
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free(args);
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return kNuOK;
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}
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/*
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* Dump a CRC list.
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*/
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void DumpCRCs(const CRCList* pCRCList)
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{
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int i;
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printf(" NumEntries: %d\n", pCRCList->numEntries);
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for (i = 0; i < pCRCList->numEntries; i++)
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printf(" %5d: 0x%04x\n", i, pCRCList->entries[i]);
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}
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/*
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* Free a CRC list.
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*/
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void FreeCRCs(CRCList* pCRCList)
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{
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if (pCRCList == NULL)
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return;
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free(pCRCList->entries);
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free(pCRCList);
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}
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/*
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* Gather a list of CRCs from the archive.
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*
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* We assume there are at most two data threads (e.g. data fork and rsrc
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* fork) in a record.
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*
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* Returns the list on success, NULL on failure.
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*/
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CRCList* GatherCRCs(NuArchive* pArchive)
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{
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NuError err = kNuErrNone;
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const NuMasterHeader* pMasterHeader;
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CRCList* pCRCList = NULL;
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uint16_t* pEntries = NULL;
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long recCount, maxCRCs;
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long recIdx, crcIdx;
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int i;
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pCRCList = malloc(sizeof(*pCRCList));
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if (pCRCList == NULL) {
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fprintf(stderr, "ERROR: couldn't alloc CRC list\n");
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err = kNuErrGeneric;
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goto bail;
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}
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memset(pCRCList, 0, sizeof(*pCRCList));
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/* get record count out of master header, just for fun */
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err = NuGetMasterHeader(pArchive, &pMasterHeader);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: couldn't get master header (err=%d)\n", err);
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goto bail;
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}
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recCount = pMasterHeader->mhTotalRecords;
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maxCRCs = recCount * 2;
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pEntries = malloc(sizeof(*pEntries) * maxCRCs);
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if (pEntries == NULL) {
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fprintf(stderr, "ERROR: unable to alloc CRC list (%ld entries)\n",
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maxCRCs);
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err = kNuErrGeneric;
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goto bail;
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}
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pCRCList->entries = pEntries;
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for (i = 0; i < maxCRCs; i++)
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pEntries[i] = 0xdead;
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/*
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* Enumerate our way through the records. If something was disturbed
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* we should end up in a different place and the CRCs will be off.
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*/
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crcIdx = 0;
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for (recIdx = 0; recIdx < recCount; recIdx++) {
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NuRecordIdx recordIdx;
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const NuRecord* pRecord;
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const NuThread* pThread;
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err = NuGetRecordIdxByPosition(pArchive, recIdx, &recordIdx);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: couldn't get record #%ld (err=%d)\n",
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recIdx, err);
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goto bail;
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}
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err = NuGetRecord(pArchive, recordIdx, &pRecord);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: unable to get recordIdx %u\n", recordIdx);
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goto bail;
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}
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if (NuRecordGetNumThreads(pRecord) == 0) {
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fprintf(stderr, "ERROR: not expecting empty record (%u)!\n",
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recordIdx);
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err = kNuErrGeneric;
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goto bail;
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}
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for (i = 0; i < (int)NuRecordGetNumThreads(pRecord); i++) {
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pThread = NuGetThread(pRecord, i);
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if (pThread->thThreadClass == kNuThreadClassData) {
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if (crcIdx >= maxCRCs) {
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fprintf(stderr, "ERROR: CRC buffer exceeded\n");
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assert(false);
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err = kNuErrGeneric;
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goto bail;
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}
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pEntries[crcIdx++] = pThread->thThreadCRC;
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}
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}
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}
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pCRCList->numEntries = crcIdx;
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DumpCRCs(pCRCList);
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bail:
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if (err != kNuErrNone) {
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FreeCRCs(pCRCList);
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pCRCList = NULL;
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}
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return pCRCList;
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}
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/*
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* Compare the current set of CRCs against our saved list. If any of
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* the records or threads were deleted or rearranged, this will fail.
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* I happen to think this is a *good* thing: if something is the least
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* bit screwy, I want to know about it.
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*
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* Unfortunately, if we *deliberately* delete records, this can't
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* help us with the survivors.
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*
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* Returns 0 on success, nonzero on failure.
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*/
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int CompareCRCs(NuArchive* pArchive, const CRCList* pOldCRCList)
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{
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CRCList* pNewCRCList = NULL;
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int result = -1;
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int badCrc = 0;
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int i;
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pNewCRCList = GatherCRCs(pArchive);
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if (pNewCRCList == NULL) {
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fprintf(stderr, "ERROR: unable to gather new list\n");
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goto bail;
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}
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if (pOldCRCList->numEntries != pNewCRCList->numEntries) {
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fprintf(stderr, "ERROR: numEntries mismatch: %d vs %d\n",
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pOldCRCList->numEntries, pNewCRCList->numEntries);
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goto bail;
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}
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for (i = 0; i < pNewCRCList->numEntries; i++) {
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if (pOldCRCList->entries[i] != pNewCRCList->entries[i]) {
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fprintf(stderr, "ERROR: CRC mismatch: %5d old=0x%04x new=0x%04x\n",
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i, pOldCRCList->entries[i], pNewCRCList->entries[i]);
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badCrc = 1;
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}
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}
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if (!badCrc) {
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printf(" Matched %d CRCs\n", pOldCRCList->numEntries);
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result = 0;
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}
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bail:
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FreeCRCs(pNewCRCList);
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return result;
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}
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/*
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* Recompress a single thread.
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*
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* This entails (1) extracting the existing thread, (2) deleting the
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* thread, and (3) adding the extracted data.
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*
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* All of this good stuff gets queued up until the next NuFlush call.
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*/
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NuError RecompressThread(NuArchive* pArchive, const NuRecord* pRecord,
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const NuThread* pThread)
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{
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NuError err = kNuErrNone;
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NuDataSource* pDataSource = NULL;
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NuDataSink* pDataSink = NULL;
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uint8_t* buf = NULL;
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if (pThread->actualThreadEOF == 0) {
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buf = malloc(1);
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if (buf == NULL) {
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fprintf(stderr, "ERROR: failed allocating trivial buffer\n");
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err = kNuErrGeneric;
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goto bail;
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}
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} else {
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/*
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* Create a buffer and data sink to hold the data.
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*/
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buf = malloc(pThread->actualThreadEOF);
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if (buf == NULL) {
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fprintf(stderr, "ERROR: failed allocating %u bytes\n",
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pThread->actualThreadEOF);
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err = kNuErrGeneric;
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goto bail;
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}
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err = NuCreateDataSinkForBuffer(true, kNuConvertOff, buf,
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pThread->actualThreadEOF, &pDataSink);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: unable to create data sink (err=%d)\n",err);
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goto bail;
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}
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/*
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* Extract the data.
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*/
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err = NuExtractThread(pArchive, pThread->threadIdx, pDataSink);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: failed extracting thread %u in '%s': %s\n",
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pThread->threadIdx, pRecord->filenameMOR, NuStrError(err));
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goto bail;
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}
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}
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/*
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* Delete the existing thread.
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*/
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err = NuDeleteThread(pArchive, pThread->threadIdx);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: unable to delete thread %u\n",
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pThread->threadIdx);
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goto bail;
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}
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/*
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* Create a data source for the new thread. Specify a callback to free
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* the buffer when NufxLib is done with it.
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*/
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err = NuCreateDataSourceForBuffer(kNuThreadFormatUncompressed,
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0, buf, 0, pThread->actualThreadEOF, FreeCallback, &pDataSource);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: unable to create data source (err=%d)\n", err);
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goto bail;
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}
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buf = NULL;
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/*
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* Create replacement thread.
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*/
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err = NuAddThread(pArchive, pRecord->recordIdx, NuGetThreadID(pThread),
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pDataSource, NULL);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: unable to add new thread ID=0x%08x (err=%d)\n",
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NuGetThreadID(pThread), err);
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goto bail;
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}
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pDataSource = NULL; /* now owned by NufxLib */
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bail:
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NuFreeDataSink(pDataSink);
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NuFreeDataSource(pDataSource);
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free(buf);
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return err;
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}
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/*
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* Recompress a single record.
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*
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* The amount of data we're holding in memory as a result of the
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* recompression is placed in "*pLen".
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*/
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NuError RecompressRecord(NuArchive* pArchive, NuRecordIdx recordIdx, long* pLen)
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{
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NuError err = kNuErrNone;
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const NuRecord* pRecord;
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const NuThread* pThread;
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int i;
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printf(" Recompressing %u\n", recordIdx);
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*pLen = 0;
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err = NuGetRecord(pArchive, recordIdx, &pRecord);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: unable to get record %u (err=%d)\n",
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recordIdx, err);
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goto bail;
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}
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for (i = 0; i < (int)NuRecordGetNumThreads(pRecord); i++) {
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pThread = NuGetThread(pRecord, i);
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if (pThread->thThreadClass == kNuThreadClassData) {
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/*printf(" Recompressing %d (threadID=0x%08lx)\n", i,
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NuGetThreadID(pThread));*/
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err = RecompressThread(pArchive, pRecord, pThread);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: failed recompressing thread %u "
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" in record %u (err=%d)\n",
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pThread->threadIdx, pRecord->recordIdx, err);
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goto bail;
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}
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*pLen += pThread->actualThreadEOF;
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} else {
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/*printf(" Skipping %d (threadID=0x%08lx)\n", i,
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NuGetThreadID(pThread));*/
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}
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}
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bail:
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return err;
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}
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/*
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* Recompress every data thread in the archive.
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*/
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NuError RecompressArchive(NuArchive* pArchive, NuValue compression)
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{
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NuError err = kNuErrNone;
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NuRecordIdx* pIndices = NULL;
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NuAttr countAttr;
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long heldLen;
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long idx;
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err = NuSetValue(pArchive, kNuValueDataCompression, compression);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: unable to set compression to %u (err=%d)\n",
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compression, err);
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goto bail;
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}
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printf("Recompressing threads with compression type %u\n", compression);
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err = NuGetAttr(pArchive, kNuAttrNumRecords, &countAttr);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: unable to get numRecords (err=%d)\n", err);
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goto bail;
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}
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if (countAttr == 0) {
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printf("No records found!\n");
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goto bail;
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}
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/*
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* Get all of the indices up front. This way, if something causes a
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* record to "disappear" during processing, we will know about it.
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*/
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pIndices = malloc(countAttr * sizeof(*pIndices));
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if (pIndices == NULL) {
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fprintf(stderr, "ERROR: malloc on %u indices failed\n", countAttr);
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err = kNuErrGeneric;
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goto bail;
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}
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for (idx = 0; idx < (int)countAttr; idx++) {
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err = NuGetRecordIdxByPosition(pArchive, idx, &pIndices[idx]);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: couldn't get record #%ld (err=%d)\n",
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idx, err);
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goto bail;
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}
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}
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/*
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* Walk through the index list, handling each record individually.
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*/
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heldLen = 0;
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for (idx = 0; idx < (int)countAttr; idx++) {
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long recHeldLen;
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err = RecompressRecord(pArchive, pIndices[idx], &recHeldLen);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: failed recompressing record %u (err=%d)\n",
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pIndices[idx], err);
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goto bail;
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}
|
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|
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heldLen += recHeldLen;
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|
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if (heldLen > kMaxHeldLen) {
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uint32_t statusFlags;
|
|
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printf(" (flush)\n");
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err = NuFlush(pArchive, &statusFlags);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: intra-recompress flush failed: %s\n",
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NuStrError(err));
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goto bail;
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}
|
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heldLen = 0;
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}
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}
|
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|
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bail:
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free(pIndices);
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return err;
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}
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|
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/*
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* Initiate the twirling.
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*/
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int TwirlArchive(const char* filename)
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{
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NuError err = kNuErrNone;
|
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NuArchive* pArchive = NULL;
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CRCList* pCRCList = NULL;
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int compression;
|
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int cc;
|
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|
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/*
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* Open the archive after removing any temp file remnants.
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*/
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cc = unlink(kTempFileName);
|
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if (cc == 0)
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printf("Removed stale temp file '%s'\n", kTempFileName);
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|
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err = NuOpenRW(filename, kTempFileName, 0, &pArchive);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: unable to open archive '%s': %s\n",
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filename, NuStrError(err));
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goto bail;
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}
|
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|
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/*
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* Mask records with no data threads, so we don't have to
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* special-case them.
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*/
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err = NuSetValue(pArchive, kNuValueMaskDataless, true);
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if (err != kNuErrNone) {
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fprintf(stderr, "ERROR: couldn't mask dataless (err=%d)\n", err);
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goto bail;
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}
|
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|
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pCRCList = GatherCRCs(pArchive);
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if (pCRCList == NULL) {
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fprintf(stderr, "ERROR: unable to get CRC list\n");
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goto bail;
|
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}
|
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|
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/*
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* For each type of compression, recompress the entire archive.
|
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*/
|
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for (compression = kNuCompressNone; compression <= kNuCompressBzip2;
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compression++)
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{
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uint32_t statusFlags;
|
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|
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if (!CompressionSupported(compression))
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continue;
|
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|
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err = RecompressArchive(pArchive, compression);
|
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if (err != kNuErrNone) {
|
|
fprintf(stderr, "ERROR: recompress failed: %s\n", NuStrError(err));
|
|
goto bail;
|
|
}
|
|
|
|
err = NuFlush(pArchive, &statusFlags);
|
|
if (err != kNuErrNone) {
|
|
fprintf(stderr, "ERROR: post-recompress flush failed: %s\n",
|
|
NuStrError(err));
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Same thing, reverse order. We want to start with the same one we
|
|
* ended on above, so we can practice skipping over things.
|
|
*/
|
|
for (compression = kNuCompressBzip2; compression >= kNuCompressNone;
|
|
compression--)
|
|
{
|
|
uint32_t statusFlags;
|
|
|
|
if (!CompressionSupported(compression))
|
|
continue;
|
|
|
|
err = RecompressArchive(pArchive, compression);
|
|
if (err != kNuErrNone) {
|
|
fprintf(stderr, "ERROR: recompress2 failed: %s\n", NuStrError(err));
|
|
goto bail;
|
|
}
|
|
|
|
err = NuFlush(pArchive, &statusFlags);
|
|
if (err != kNuErrNone) {
|
|
fprintf(stderr, "ERROR: post-recompress flush2 failed: %s\n",
|
|
NuStrError(err));
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
if (CompareCRCs(pArchive, pCRCList) != 0) {
|
|
fprintf(stderr, "ERROR: CRCs didn't match\n");
|
|
goto bail;
|
|
}
|
|
|
|
printf("Done!\n");
|
|
|
|
bail:
|
|
FreeCRCs(pCRCList);
|
|
if (pArchive != NULL) {
|
|
NuAbort(pArchive);
|
|
NuClose(pArchive);
|
|
}
|
|
|
|
return (err != kNuErrNone);
|
|
}
|
|
|
|
|
|
/*
|
|
* Copy from the current offset in "srcfp" to a new file called
|
|
* "outFileName". Returns a writable file descriptor for the new file
|
|
* on success, or NULL on error.
|
|
*
|
|
* (Note "CopyFile()" exists under Win32.)
|
|
*/
|
|
FILE* MyCopyFile(const char* outFileName, FILE* srcfp)
|
|
{
|
|
char buf[24576];
|
|
FILE* outfp;
|
|
size_t count;
|
|
|
|
outfp = fopen(outFileName, kNuFileOpenWriteTrunc);
|
|
if (outfp == NULL) {
|
|
fprintf(stderr, "ERROR: unable to open '%s' (err=%d)\n", outFileName,
|
|
errno);
|
|
return NULL;
|
|
}
|
|
|
|
while (!feof(srcfp)) {
|
|
count = fread(buf, 1, sizeof(buf), srcfp);
|
|
if (count == 0)
|
|
break;
|
|
if (fwrite(buf, 1, count, outfp) != count) {
|
|
fprintf(stderr, "ERROR: failed writing outfp (err=%d)\n", errno);
|
|
fclose(outfp);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (ferror(srcfp)) {
|
|
fprintf(stderr, "ERROR: failed reading srcfp (err=%d)\n", errno);
|
|
fclose(outfp);
|
|
return NULL;
|
|
}
|
|
|
|
return outfp;
|
|
}
|
|
|
|
/*
|
|
* Let's get started.
|
|
*/
|
|
int main(int argc, char** argv)
|
|
{
|
|
int32_t major, minor, bug;
|
|
const char* pBuildDate;
|
|
FILE* srcfp = NULL;
|
|
FILE* infp = NULL;
|
|
int cc;
|
|
|
|
/* don't buffer output */
|
|
setvbuf(stdout, NULL, _IONBF, 0);
|
|
setvbuf(stderr, NULL, _IONBF, 0);
|
|
|
|
(void) NuGetVersion(&major, &minor, &bug, &pBuildDate, NULL);
|
|
printf("Using NuFX lib %d.%d.%d built on or after %s\n\n",
|
|
major, minor, bug, pBuildDate);
|
|
|
|
if (argc == 2) {
|
|
srcfp = fopen(argv[1], kNuFileOpenReadOnly);
|
|
if (srcfp == NULL) {
|
|
perror("fopen failed");
|
|
exit(1);
|
|
}
|
|
} else {
|
|
fprintf(stderr, "ERROR: you have to specify a filename\n");
|
|
exit(2);
|
|
}
|
|
|
|
printf("Copying '%s' to '%s'\n", argv[1], kWorkFileName);
|
|
|
|
infp = MyCopyFile(kWorkFileName, srcfp);
|
|
if (infp == NULL) {
|
|
fprintf(stderr, "Copy failed, bailing.\n");
|
|
exit(1);
|
|
}
|
|
fclose(srcfp);
|
|
fclose(infp);
|
|
|
|
cc = TwirlArchive(kWorkFileName);
|
|
|
|
exit(cc != 0);
|
|
}
|
|
|