gecko-dev/uriloader/exthandler/mac/nsDecodeAppleFile.cpp

390 строки
12 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsDecodeAppleFile.h"
#include "prmem.h"
#include "nsCRT.h"
NS_IMPL_ADDREF(nsDecodeAppleFile)
NS_IMPL_RELEASE(nsDecodeAppleFile)
NS_INTERFACE_MAP_BEGIN(nsDecodeAppleFile)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIOutputStream)
NS_INTERFACE_MAP_ENTRY(nsIOutputStream)
NS_INTERFACE_MAP_END_THREADSAFE
nsDecodeAppleFile::nsDecodeAppleFile()
{
m_state = parseHeaders;
m_dataBufferLength = 0;
m_dataBuffer = (unsigned char*) PR_MALLOC(MAX_BUFFERSIZE);
m_entries = nullptr;
m_rfRefNum = -1;
m_totalDataForkWritten = 0;
m_totalResourceForkWritten = 0;
m_headerOk = false;
m_comment[0] = 0;
memset(&m_dates, 0, sizeof(m_dates));
memset(&m_finderInfo, 0, sizeof(m_dates));
memset(&m_finderExtraInfo, 0, sizeof(m_dates));
}
nsDecodeAppleFile::~nsDecodeAppleFile()
{
PR_FREEIF(m_dataBuffer);
if (m_entries)
delete [] m_entries;
}
NS_IMETHODIMP nsDecodeAppleFile::Initialize(nsIOutputStream *output, nsIFile *file)
{
m_output = output;
nsCOMPtr<nsILocalFileMac> macFile = do_QueryInterface(file);
macFile->GetTargetFSSpec(&m_fsFileSpec);
m_offset = 0;
m_dataForkOffset = 0;
return NS_OK;
}
NS_IMETHODIMP nsDecodeAppleFile::Close(void)
{
nsresult rv;
rv = m_output->Close();
int32_t i;
if (m_rfRefNum != -1)
FSClose(m_rfRefNum);
/* Check if the file is complete and if it's the case, write file attributes */
if (m_headerOk)
{
bool dataOk = true; /* It's ok if the file doesn't have a datafork, therefore set it to true by default. */
if (m_headers.magic == APPLESINGLE_MAGIC)
{
for (i = 0; i < m_headers.entriesCount; i ++)
if (ENT_DFORK == m_entries[i].id)
{
dataOk = (bool)(m_totalDataForkWritten == m_entries[i].length);
break;
}
}
bool resourceOk = FALSE;
for (i = 0; i < m_headers.entriesCount; i ++)
if (ENT_RFORK == m_entries[i].id)
{
resourceOk = (bool)(m_totalResourceForkWritten == m_entries[i].length);
break;
}
if (dataOk && resourceOk)
{
HFileInfo *fpb;
CInfoPBRec cipbr;
fpb = (HFileInfo *) &cipbr;
fpb->ioVRefNum = m_fsFileSpec.vRefNum;
fpb->ioDirID = m_fsFileSpec.parID;
fpb->ioNamePtr = m_fsFileSpec.name;
fpb->ioFDirIndex = 0;
PBGetCatInfoSync(&cipbr);
/* set finder info */
memcpy(&fpb->ioFlFndrInfo, &m_finderInfo, sizeof (FInfo));
memcpy(&fpb->ioFlXFndrInfo, &m_finderExtraInfo, sizeof (FXInfo));
fpb->ioFlFndrInfo.fdFlags &= 0xfc00; /* clear flags maintained by finder */
/* set file dates */
fpb->ioFlCrDat = m_dates.create - CONVERT_TIME;
fpb->ioFlMdDat = m_dates.modify - CONVERT_TIME;
fpb->ioFlBkDat = m_dates.backup - CONVERT_TIME;
/* update file info */
fpb->ioDirID = fpb->ioFlParID;
PBSetCatInfoSync(&cipbr);
/* set comment */
IOParam vinfo;
GetVolParmsInfoBuffer vp;
DTPBRec dtp;
memset((void *) &vinfo, 0, sizeof (vinfo));
vinfo.ioVRefNum = fpb->ioVRefNum;
vinfo.ioBuffer = (Ptr) &vp;
vinfo.ioReqCount = sizeof (vp);
if (PBHGetVolParmsSync((HParmBlkPtr) &vinfo) == noErr && ((vp.vMAttrib >> bHasDesktopMgr) & 1))
{
memset((void *) &dtp, 0, sizeof (dtp));
dtp.ioVRefNum = fpb->ioVRefNum;
if (PBDTGetPath(&dtp) == noErr)
{
dtp.ioDTBuffer = (Ptr) &m_comment[1];
dtp.ioNamePtr = fpb->ioNamePtr;
dtp.ioDirID = fpb->ioDirID;
dtp.ioDTReqCount = m_comment[0];
if (PBDTSetCommentSync(&dtp) == noErr)
PBDTFlushSync(&dtp);
}
}
}
}
return rv;
}
NS_IMETHODIMP nsDecodeAppleFile::Flush(void)
{
return m_output->Flush();
}
NS_IMETHODIMP nsDecodeAppleFile::WriteFrom(nsIInputStream *inStr, uint32_t count, uint32_t *_retval)
{
return m_output->WriteFrom(inStr, count, _retval);
}
NS_IMETHODIMP nsDecodeAppleFile::WriteSegments(nsReadSegmentFun reader, void * closure, uint32_t count, uint32_t *_retval)
{
return m_output->WriteSegments(reader, closure, count, _retval);
}
NS_IMETHODIMP nsDecodeAppleFile::IsNonBlocking(bool *aNonBlocking)
{
return m_output->IsNonBlocking(aNonBlocking);
}
NS_IMETHODIMP nsDecodeAppleFile::Write(const char *buffer, uint32_t bufferSize, uint32_t* writeCount)
{
/* WARNING: to simplify my life, I presume that I should get all appledouble headers in the first block,
else I would have to implement a buffer */
const char * buffPtr = buffer;
uint32_t dataCount;
int32_t i;
nsresult rv = NS_OK;
*writeCount = 0;
while (bufferSize > 0 && NS_SUCCEEDED(rv))
{
switch (m_state)
{
case parseHeaders :
dataCount = sizeof(ap_header) - m_dataBufferLength;
if (dataCount > bufferSize)
dataCount = bufferSize;
memcpy(&m_dataBuffer[m_dataBufferLength], buffPtr, dataCount);
m_dataBufferLength += dataCount;
if (m_dataBufferLength == sizeof(ap_header))
{
memcpy(&m_headers, m_dataBuffer, sizeof(ap_header));
/* Check header to be sure we are dealing with the right kind of data, else just write it to the data fork. */
if ((m_headers.magic == APPLEDOUBLE_MAGIC || m_headers.magic == APPLESINGLE_MAGIC) &&
m_headers.version == VERSION && m_headers.entriesCount)
{
/* Just to be sure, the filler must contains only 0 */
for (i = 0; i < 4 && m_headers.fill[i] == 0L; i ++)
;
if (i == 4)
m_state = parseEntries;
}
m_dataBufferLength = 0;
if (m_state == parseHeaders)
{
dataCount = 0;
m_state = parseWriteThrough;
}
}
break;
case parseEntries :
if (!m_entries)
{
m_entries = new ap_entry[m_headers.entriesCount];
if (!m_entries)
return NS_ERROR_OUT_OF_MEMORY;
}
uint32_t entriesSize = sizeof(ap_entry) * m_headers.entriesCount;
dataCount = entriesSize - m_dataBufferLength;
if (dataCount > bufferSize)
dataCount = bufferSize;
memcpy(&m_dataBuffer[m_dataBufferLength], buffPtr, dataCount);
m_dataBufferLength += dataCount;
if (m_dataBufferLength == entriesSize)
{
for (i = 0; i < m_headers.entriesCount; i ++)
{
memcpy(&m_entries[i], &m_dataBuffer[i * sizeof(ap_entry)], sizeof(ap_entry));
if (m_headers.magic == APPLEDOUBLE_MAGIC)
{
uint32_t offset = m_entries[i].offset + m_entries[i].length;
if (offset > m_dataForkOffset)
m_dataForkOffset = offset;
}
}
m_headerOk = true;
m_state = parseLookupPart;
}
break;
case parseLookupPart :
/* which part are we parsing? */
m_currentPartID = -1;
for (i = 0; i < m_headers.entriesCount; i ++)
if (m_offset == m_entries[i].offset && m_entries[i].length)
{
m_currentPartID = m_entries[i].id;
m_currentPartLength = m_entries[i].length;
m_currentPartCount = 0;
switch (m_currentPartID)
{
case ENT_DFORK : m_state = parseDataFork; break;
case ENT_RFORK : m_state = parseResourceFork; break;
case ENT_COMMENT :
case ENT_DATES :
case ENT_FINFO :
m_dataBufferLength = 0;
m_state = parsePart;
break;
default : m_state = parseSkipPart; break;
}
break;
}
if (m_currentPartID == -1)
{
/* maybe is the datafork of an appledouble file? */
if (m_offset == m_dataForkOffset)
{
m_currentPartID = ENT_DFORK;
m_currentPartLength = -1;
m_currentPartCount = 0;
m_state = parseDataFork;
}
else
dataCount = 1;
}
break;
case parsePart :
dataCount = m_currentPartLength - m_dataBufferLength;
if (dataCount > bufferSize)
dataCount = bufferSize;
memcpy(&m_dataBuffer[m_dataBufferLength], buffPtr, dataCount);
m_dataBufferLength += dataCount;
if (m_dataBufferLength == m_currentPartLength)
{
switch (m_currentPartID)
{
case ENT_COMMENT :
m_comment[0] = m_currentPartLength > 255 ? 255 : m_currentPartLength;
memcpy(&m_comment[1], buffPtr, m_comment[0]);
break;
case ENT_DATES :
if (m_currentPartLength == sizeof(m_dates))
memcpy(&m_dates, buffPtr, m_currentPartLength);
break;
case ENT_FINFO :
if (m_currentPartLength == (sizeof(m_finderInfo) + sizeof(m_finderExtraInfo)))
{
memcpy(&m_finderInfo, buffPtr, sizeof(m_finderInfo));
memcpy(&m_finderExtraInfo, buffPtr + sizeof(m_finderInfo), sizeof(m_finderExtraInfo));
}
break;
}
m_state = parseLookupPart;
}
break;
case parseSkipPart :
dataCount = m_currentPartLength - m_currentPartCount;
if (dataCount > bufferSize)
dataCount = bufferSize;
else
m_state = parseLookupPart;
break;
case parseDataFork :
if (m_headers.magic == APPLEDOUBLE_MAGIC)
dataCount = bufferSize;
else
{
dataCount = m_currentPartLength - m_currentPartCount;
if (dataCount > bufferSize)
dataCount = bufferSize;
else
m_state = parseLookupPart;
}
if (m_output)
{
uint32_t writeCount;
rv = m_output->Write((const char *)buffPtr, dataCount, &writeCount);
if (dataCount != writeCount)
rv = NS_ERROR_FAILURE;
m_totalDataForkWritten += dataCount;
}
break;
case parseResourceFork :
dataCount = m_currentPartLength - m_currentPartCount;
if (dataCount > bufferSize)
dataCount = bufferSize;
else
m_state = parseLookupPart;
if (m_rfRefNum == -1)
{
if (noErr != FSpOpenRF(&m_fsFileSpec, fsWrPerm, &m_rfRefNum))
return NS_ERROR_FAILURE;
}
long count = dataCount;
if (noErr != FSWrite(m_rfRefNum, &count, buffPtr) || count != dataCount)
return NS_ERROR_FAILURE;
m_totalResourceForkWritten += dataCount;
break;
case parseWriteThrough :
dataCount = bufferSize;
if (m_output)
{
uint32_t writeCount;
rv = m_output->Write((const char *)buffPtr, dataCount, &writeCount);
if (dataCount != writeCount)
rv = NS_ERROR_FAILURE;
}
break;
}
if (dataCount)
{
*writeCount += dataCount;
bufferSize -= dataCount;
buffPtr += dataCount;
m_currentPartCount += dataCount;
m_offset += dataCount;
dataCount = 0;
}
}
return rv;
}