ERXMacBinarySwissArmyKnife (Project Wonder Reference Documentation)

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Project Wonder 2.0

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er.extensions
Class ERXMacBinarySwissArmyKnife

java.lang.Object
  er.extensions.ERXMacBinarySwissArmyKnife

public class ERXMacBinarySwissArmyKnife
extends Object

Useful for extracting files from binhexed files, ie when a Mac user uploads a file.

Field Summary
`static int`	`_AT` Offsets in header where the fields are located.
`static int`	`CRC_AT` Offsets in header where the fields are located.
`static int`	`FILE_CREATOR_AT` Offsets in header where the fields are located.
`static int`	`FILE_TYPE_AT` Offsets in header where the fields are located.
`static int`	`FINDER_FLAGS1_AT` Offsets in header where the fields are located.
`static int`	`FINDER_FLAGS2_AT` Offsets in header where the fields are located.
`static int`	`FINDER_FLAGS3_AT` Offsets in header where the fields are located.
`static int`	`FINDER_HORZ_AT` Offsets in header where the fields are located.
`static int`	`FINDER_VERT_AT` Offsets in header where the fields are located.
`static int`	`FINDER_WINDOW_AT` Offsets in header where the fields are located.
`static int`	`FLAG_LOCKED_AT` Offsets in header where the fields are located.
`static int`	`LEN_COMMENT_AT` Offsets in header where the fields are located.
`static int`	`LEN_DATA_FORK_AT` Offsets in header where the fields are located.
`static int`	`LEN_RES_FORK_AT` Offsets in header where the fields are located.
`static int`	`LEN_SECONDARY_AT` Offsets in header where the fields are located.
`protected static int[]`	`levelMasks` Bit-masks for different levels.
`static long`	`LIMIT_DATAFORK` Enforce this limit on data-fork length, due either to Mac OS API or field-width.
`static int`	`LIMIT_NAME` Enforce this limit on name-length, regardless of available space in header.
`static int`	`LIMIT_RESFORK` Enforce this limit on resource-fork length, due either to Mac OS API or field-width.
`static ERXLogger`	`log`
`static int`	`MACBINARY_HEADER_LEN` Length of a MacBinary header, always the first component of the file, and the only required element.
`static int`	`MB1_VERSION` Possible values in VERSION_TARGET_AT and VERSION_MIN_AT byte-sized fields.
`static int`	`MB2_VERSION` Possible values in VERSION_TARGET_AT and VERSION_MIN_AT byte-sized fields.
`static int`	`MB3_SIGNATURE` Distinctive int-sized value in MB3_SIGNATURE_AT field, only present for MB-3 format.
`static int`	`MB3_SIGNATURE_AT` Offsets in header where the fields are located.
`static int`	`MB3_VERSION` Possible values in VERSION_TARGET_AT and VERSION_MIN_AT byte-sized fields.
`static int`	`NAME_BYTES_AT` Offsets in header where the fields are located.
`static int`	`NAME_LEN_AT` Offsets in header where the fields are located.
`static int`	`NAME_SCRIPT_AT` Offsets in header where the fields are located.
`protected static boolean`	`strict`
`static int`	`VERSION_MIN_AT` Offsets in header where the fields are located.
`static int`	`VERSION_OBSOLETE_AT` Offsets in header where the fields are located.
`static int`	`VERSION_TARGET_AT` Offsets in header where the fields are located.
`static int`	`WHEN_CREATED_AT` Offsets in header where the fields are located.
`static int`	`WHEN_MODIFIED_AT` Offsets in header where the fields are located.
`static int`	`ZERO_1_AT` Offsets in header where the fields are located.
`static int`	`ZERO_2_AT` Offsets in header where the fields are located.
`static int`	`ZERO_3_AT` Offsets in header where the fields are located.

Constructor Summary
`ERXMacBinarySwissArmyKnife()`
`ERXMacBinarySwissArmyKnife(NSData fileData)`

Method Summary
`int`	`calcCRC()` Calculate and return a CRC over the header.
`int`	`calcCRC2()` Calculate and return an alternative header CRC.
`static int`	`calculateCRC(int seed, byte[] bytes, int offset, int count)` Calculate a MacBinary CRC using the given starting seed, and proceeding over the given range of bytes.
`int`	`checkFormat(boolean strict)`
`byte[]`	`getByteArray()` Get the internal byte-array.
`byte`	`getByteAt(int offset)` Return the signed byte at the given offset.
`int`	`getCRC()` Return the header CRC, as embedded in the header itself.
`int`	`getDataForkLength()` Get the data-fork length from the header.
`int`	`getIntAt(int offset)` Return the signed int at the given offset.
`long`	`getLongAt(int offset)` Return the signed long at the given offset.
`int`	`getResourceForkLength()` Get the resource-fork length from the header.
`short`	`getShortAt(int offset)` Return the signed short at the given offset.
`int`	`getUByteAt(int offset)` Return an int holding the unsigned byte at the given offset.
`long`	`getUIntAt(int offset)` Return a long holding the unsigned int at the given offset.
`int`	`getUShortAt(int offset)` Return an int holding the unsigned short at the given offset.
`boolean`	`isMacBinary(NSData fileData)`
`boolean`	`isValidCRC()` Calculate and check the header CRC.
`void`	`putByteAt(byte value, int offset)` Put the given byte at the supplied offset.
`void`	`putBytesAt(byte[] data, int offset)` Put all the given bytes at the supplied offset.
`void`	`putBytesAt(byte[] data, int offset, int count)` Put the given bytes at the supplied offset.
`void`	`putIntAt(int value, int offset)` Put the given int at the supplied offset.
`void`	`putLongAt(long value, int offset)` Put the given long at the supplied offset.
`void`	`putShortAt(short value, int offset)` Put the given short at the supplied offset.
`void`	`setByteArray(byte[] bytes)` Use the given array to hold bytes.
`void`	`setCRC()` Calculate and set the CRC over the header bytes previously set, invoking calcCRC() to calculate the 16-bit value to store.
`NSData`	`unwrapMacBinary(NSData fileContents)`

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail