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- /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- /* MacBinary support.c
-
- This file implements MacBinary (actually MacBinary II) support for the following:
-
- -Determine the size of a file when encoded in MacBinary
-
- -Inline encoding of a file in MacBinary format
-
- The MacBinary II format consists of a 128-byte header containing all the
- information necessary to reproduce the document's directory entry on the
- receiving Macintosh; followed by the document's Data Fork (if it has one),
- padded with nulls to a multiple of 128 bytes (if necessary); followed by the
- document's Resource Fork (again, padded if necessary). The lengths of these
- forks (either or both of which may be zero) are contained in the header.
-
- The format of the header for MacBinary II is as follows:
-
- Offset 000 Byte old version number, must be kept at zero for compatibility
- Offset 001 Byte Length of filename (must be in the range 1-63)
- Offset 002 1 to 63 chars, filename (only "length" bytes are significant).
- Offset 065 Long file type (normally expressed as four characters)
- Offset 069 Long file creator (normally expressed as four characters)
- Offset 073 Byte original Finder flags
- Bit 7 - Locked.
- Bit 6 - Invisible.
- Bit 5 - Bundle.
- Bit 4 - System.
- Bit 3 - Bozo.
- Bit 2 - Busy.
- Bit 1 - Changed.
- Bit 0 - Inited.
- Offset 074 Byte zero fill, must be zero for compatibility
- Offset 075 Short file's vertical position within its window.
- Offset 077 Short file's horizontal position within its window.
- Offset 079 Short file's window or folder ID.
- Offset 081 Byte "Protected" flag (in low order bit).
- Offset 082 Byte zero fill, must be zero for compatibility
- Offset 083 Long Data Fork length (bytes, zero if no Data Fork).
- Offset 087 Long Resource Fork length (bytes, zero if no R.F.).
- Offset 091 Long File's creation date
- Offset 095 Long File's "last modified" date.
- Offset 099 Short zero fill (was file comment length which is not supported)
- Offset 101 Byte Finder Flags, bits 0-7. (Bits 8-15 are already in byte 73)
- Offset 116 Long Length of total files when packed files are unpacked.
- This is only used by programs that pack and unpack on the fly,
- mimicing a standalone utility such as PackIt. A program that is
- uploading a single file must zero this location when sending a
- file. Programs that do not unpack/uncompress files when
- downloading may ignore this value.
- Offset 120 Short zero fill (was length of a secondary header which is not supported)
- Offset 122 Byte Version number of Macbinary II that the uploading program
- is written for (the version begins at 129)
- Offset 123 Byte Minimum MacBinary II version needed to read this file
- (start this value at 129)
- Offset 124 Short CRC of previous 124 bytes
-
- All values are stored in normal 68000 order, with Most Significant Byte
- appearing first then the file. Any bytes in the header not defined above
- should be set to zero.
-
-
- MacBinary header creation and CRC calculation based on Erny Tontlinger's free 'Terminal' source
-
- */
-
- #include "xp.h"
-
- #include "MacBinSupport.h"
-
- #include "MoreFilesExtras.h"
-
- enum
- {
- kMB_SendingHeader, /* Data from read is MB header */
- kMB_SetupDataFork, /* Finished sending MB header so prepare data fork */
- kMB_SendingDataFork, /* Data from read is file's data fork */
- kMB_SetupResFork, /* Finished sending data fork so prepare res fork */
- kMB_SendingResFork, /* Data from read is file's data fork */
- kMB_FinishedFile /* Nothing left to send - file finished */
-
- };
-
- static Byte fillerBuf[kMBHeaderLength];
-
- static unsigned short CalcMacBinaryCRC(Byte *ptr, unsigned long count)
- {
- unsigned short crc;
- unsigned short i;
-
- crc = 0;
- while (count-- > 0) {
- crc = crc ^ (unsigned short)*ptr++ << 8;
- for (i = 0; i < 8; ++i)
- if (crc & 0x8000)
- crc = crc << 1 ^ 0x1021;
- else
- crc = crc << 1;
- }
- return crc;
- }
-
- static OSErr InitMacBinaryHeader(MB_FileSpec *mbFileSpec)
- {
- #define MB_VersionNumber 129
- #define MBH_name 1
- #define MBH_info1 65
- #define MBH_protected 81
- #define MBH_dLength 83
- #define MBH_rLength 87
- #define MBH_creation 91
- #define MBH_modification 95
- #define MBH_getInfoLength 99
- #define MBH_info2 101
- #define MBH_filesLength 116
- #define MBH_sHeaderLength 120
- #define MBH_newVersion 122
- #define MBH_minimumVersion 123
- #define MBH_crc 124
-
- OSErr theErr;
- unsigned short crc;
- HParamBlockRec param;
-
- XP_MEMSET(¶m, 0, sizeof(param));
- param.fileParam.ioNamePtr = (StringPtr)mbFileSpec->theFileSpec.name;
- param.fileParam.ioVRefNum = mbFileSpec->theFileSpec.vRefNum;
- param.fileParam.ioDirID = mbFileSpec->theFileSpec.parID;
- theErr = PBHGetFInfoSync(¶m);
- if (theErr != noErr)
- return (theErr);
-
- XP_MEMSET(mbFileSpec->mbHeader, 0, kMBHeaderLength);
-
- XP_MEMCPY(
- &mbFileSpec->mbHeader[MBH_name],
- mbFileSpec->theFileSpec.name, mbFileSpec->theFileSpec.name[0] + 1);
- mbFileSpec->mbHeader[MBH_info2] = param.fileParam.ioFlFndrInfo.fdFlags & 0x00FF;
- param.fileParam.ioFlFndrInfo.fdFlags &= 0xFF00;
- *(long *)¶m.fileParam.ioFlFndrInfo.fdLocation = 0;
- param.fileParam.ioFlFndrInfo.fdFldr = 0;
- XP_MEMCPY(&mbFileSpec->mbHeader[MBH_info1], (void *)¶m.fileParam.ioFlFndrInfo, 16);
- mbFileSpec->mbHeader[MBH_protected] = (Byte)(param.fileParam.ioFlAttrib) & 0x01;
- XP_MEMCPY(&mbFileSpec->mbHeader[MBH_dLength], (void *)¶m.fileParam.ioFlLgLen, 4);
- XP_MEMCPY(&mbFileSpec->mbHeader[MBH_rLength], (void *)¶m.fileParam.ioFlRLgLen, 4);
- XP_MEMCPY(&mbFileSpec->mbHeader[MBH_creation], (void *)¶m.fileParam.ioFlCrDat, 4);
- XP_MEMCPY(&mbFileSpec->mbHeader[MBH_modification], (void *)¶m.fileParam.ioFlMdDat, 4);
- mbFileSpec->mbHeader[MBH_newVersion] = MB_VersionNumber;
- mbFileSpec->mbHeader[MBH_minimumVersion] = MB_VersionNumber;
- crc = CalcMacBinaryCRC(mbFileSpec->mbHeader, 124);
- XP_MEMCPY(&mbFileSpec->mbHeader[MBH_crc], (void *)&crc, 2);
-
- mbFileSpec->dataForkLength = param.fileParam.ioFlLgLen;
- mbFileSpec->resForkLength = param.fileParam.ioFlRLgLen;
-
- return (noErr);
- }
-
- static long PadBufferToMacBinBlock(char *buf, long bytesInBuf)
- {
- long paddingNeeded = 0;
-
- if (bytesInBuf % kMBHeaderLength)
- {
- paddingNeeded = kMBHeaderLength - (bytesInBuf % kMBHeaderLength);
- XP_MEMCPY(&buf[bytesInBuf], fillerBuf, paddingNeeded);
- }
-
- return (bytesInBuf + paddingNeeded);
- }
-
- /* MB_Stat
-
- Returns the size of the file when encoded in MacBinary format
-
- This is computed as 128 bytes for the MacBinary header + the size of the data fork
- rounded up to a multiple of 128 bytes + the size of the resource fork rounded up to
- a multiple of 128 bytes.
- */
-
- int MB_Stat( const char* name, XP_StatStruct * outStat, XP_FileType type )
- {
- int result = -1;
- long totalFileSize = 0;
- char *newName = WH_FileName( name, type );
- FSSpec fileSpec = {0, 0, "\p"};
- OSErr theErr;
- long dataSize;
- long rsrcSize;
- long sizeRemainder;
-
- /* See if we managed to copy the name */
- if (!newName)
- return (result);
-
- /* Now see if we can find out something about the file */
- theErr = FSSpecFromPathname_CWrapper(newName, &fileSpec);
- if (theErr == noErr)
- {
- theErr = FSpGetFileSize(&fileSpec, &dataSize, &rsrcSize);
- if (theErr == noErr)
- {
- result = 0; /* Set the result code to success */
-
- totalFileSize = kMBHeaderLength; /* 128 bytes for the MacBin header */
-
- /* Make sure data and rsrc sizes are multiples of 128 bytes
- before adding them to totalFileSize */
- sizeRemainder = dataSize % kMBHeaderLength;
- if (sizeRemainder)
- {
- dataSize += (kMBHeaderLength - sizeRemainder);
- }
- totalFileSize += dataSize;
-
- sizeRemainder = rsrcSize % kMBHeaderLength;
- if (sizeRemainder)
- {
- rsrcSize += (kMBHeaderLength - sizeRemainder);
- }
- totalFileSize += rsrcSize;
-
- /* Stuff the calculated file size into the appropriate stat field */
- outStat->st_size = totalFileSize;
- }
- }
-
- XP_FREE(newName);
-
- return (result);
- }
-
- /* MB_Open
-
- Prepares a file for inline encoding in the MacBinary format. It builds the
- MacBinary header and initializes the state machine for the encoding process.
-
-
- Get file info
- Build MacBinary header
- Set state machine to kMB_SendingHeader
-
- */
-
- OSErr MB_Open(const char *name, MB_FileSpec *mbFileSpec)
- {
- char *newName = WH_FileName( name, xpFileToPost );
- OSErr theErr = noErr;
-
- /* See if we managed to copy the name */
- if (!newName)
- return (fnfErr);
-
- /* Now see if we can find make an FSSpec for the file */
- theErr = FSSpecFromPathname_CWrapper(newName, &mbFileSpec->theFileSpec);
- if (theErr == noErr)
- {
- theErr = InitMacBinaryHeader(mbFileSpec);
- if (theErr == noErr)
- {
- // Set up the rest of the MB_FileSpec info
- mbFileSpec->fileState = kMB_SendingHeader;
- mbFileSpec->fileRefNum = -1;
- mbFileSpec->dataBytesRead = 0;
- mbFileSpec->resBytesRead = 0;
- }
- }
-
- /* Make sure our filler buffer is cleared */
- XP_MEMSET(fillerBuf, 0, kMBHeaderLength);
-
- return (theErr);
- }
-
- /* MB_Read
-
- Provides a MacBinary encoded version of a file. All reads are done to the supplied
- buffer. The MB_Read function just returns how many bytes have been placed in the
- buffer.
-
- Switch on state
- kMB_SendingHeader
- set state to kMB_SetupDataFork
- Return the # of bytes in an MB header
- kMB_SetupDataFork
- If hasDataFork
- Open the data fork of the file
- Set the state to kMB_SendingDataFork
- GOTO kMB_SendingDataFork
- else
- GOTO kMB_SetupResFork
- kMB_SendingDataFork
- Read a buffer's worth of data
- Make sure buffer is padded to MB block boundary
- If EOF set state to kMB_SetupResFork
- Return the # of bytes in buffer
- kMB_SetupResFork
- Close data fork if open
- If hasResFork
- Open the resource fork of the file
- Set the state to kMB_SendingResFork
- GOTO kMB_SendingResFork
- else
- GOTO kMB_FinishedFile
- kMB_SendingResFork
- Read a buffer's worth of data
- Make sure buffer is padded to MB block boundary
- If EOF set state to kMB_FinishedFile
- Return the # of bytes in buffer
- kMB_FinishedFile
- Close resource fork if open
- Set the state to kMB_FinishedFile
-
- */
- int32 MB_Read(char *buf, int bufSize, MB_FileSpec *mbFileSpec)
- {
- long bytesInBuf = 0;
- OSErr theErr = noErr;
- long count = bufSize;
-
- switch (mbFileSpec->fileState)
- {
- case kMB_SendingHeader:
- XP_MEMCPY(buf, mbFileSpec->mbHeader, kMBHeaderLength);
- bytesInBuf = kMBHeaderLength;
- mbFileSpec->fileState = kMB_SetupDataFork;
- break;
-
- case kMB_SetupDataFork:
- if (mbFileSpec->dataForkLength)
- {
- theErr = FSpOpenDF(&mbFileSpec->theFileSpec, fsRdPerm, &mbFileSpec->fileRefNum);
- if (theErr == noErr)
- {
- mbFileSpec->fileState = kMB_SendingDataFork;
-
- /* Now that the data fork is open jump into the read state */
- goto SendingDataFork;
- }
- else
- { /* Couldn't open the data fork so exit the state machine */
- goto FinishedFile;
- }
- }
- else
- { /* Apparently no data fork so go ahead and try the res fork */
- goto SetupResFork;
- }
- break;
-
- case kMB_SendingDataFork:
- SendingDataFork:
- theErr = FSRead(mbFileSpec->fileRefNum, &count, buf);
- if (theErr == noErr || theErr == eofErr)
- {
- bytesInBuf = PadBufferToMacBinBlock(buf, count);
- mbFileSpec->dataBytesRead += count;
-
- /* See if we've reached EOF for the data */
- if (mbFileSpec->dataBytesRead == mbFileSpec->dataForkLength)
- mbFileSpec->fileState = kMB_SetupResFork;
- }
- else
- { /* Got some sort of error reading the data fork so exit the state machine */
- goto FinishedFile;
- }
- break;
-
- case kMB_SetupResFork:
- SetupResFork:
- /* Close the data fork */
- if (mbFileSpec->fileRefNum != -1)
- {
- FSClose(mbFileSpec->fileRefNum);
- mbFileSpec->fileRefNum = -1;
- }
-
- /* See if we have a res fork to send */
- if (mbFileSpec->resForkLength)
- {
- theErr = FSpOpenRF(&mbFileSpec->theFileSpec, fsRdPerm, &mbFileSpec->fileRefNum);
- if (theErr == noErr)
- {
- mbFileSpec->fileState = kMB_SendingResFork;
- /* Now that the res fork is open jump into the read state */
- goto SendingResFork;
- }
- else
- { /* Couldn't open the res fork so exit the state machine */
- goto FinishedFile;
- }
- }
- else
- { /* Apparently no res fork so go ahead and exite the state machine */
- goto FinishedFile;
- }
-
- case kMB_SendingResFork:
- SendingResFork:
- theErr = FSRead(mbFileSpec->fileRefNum, &count, buf);
- if (theErr == noErr || theErr == eofErr)
- {
- bytesInBuf = PadBufferToMacBinBlock(buf, count);
- mbFileSpec->resBytesRead += count;
-
- /* See if we've reached EOF for the res fork */
- if (mbFileSpec->resBytesRead == mbFileSpec->resForkLength)
- mbFileSpec->fileState = kMB_FinishedFile;
- }
- else
- { /* Got some sort of error reading the res fork so exit the state machine */
- goto FinishedFile;
- }
- break;
-
- case kMB_FinishedFile:
- FinishedFile:
- /* If we're here then we're done with the file */
- mbFileSpec->fileState = kMB_FinishedFile;
-
- /* If we have a fork open, close it */
- if (mbFileSpec->fileRefNum != -1)
- {
- FSClose(mbFileSpec->fileRefNum);
- mbFileSpec->fileRefNum = -1;
- }
- break;
- }
-
- return ((int32)bytesInBuf);
- }
-
- /* MB_Close
-
- Nothing really to do since the file forks are actually closed in the MB_Read
- routine after they have been sent.
- */
- void MB_Close(MB_FileSpec *mbFileSpec)
- {
- if (mbFileSpec->fileRefNum != -1)
- FSClose(mbFileSpec->fileRefNum);
-
- mbFileSpec->fileState = kMB_FinishedFile;
- }
-