public MacBinary(Stream input)
{
byte[] buf = new byte[128];
if (input.Read(buf, 0, 128) != 128)
throw new MacBinaryException("Could not read header.");
version = Version.MacBinaryIII;
// Version
if (buf[0] != 0)
throw new MacBinaryException("Incompatible version.");
// Signature 'mBIN'
if (buf[102] != 'm' || buf[103] != 'B' || buf[104] != 'I' || buf[105] != 'N')
version = Version.MacBinaryII;
// Zero padding
if (buf[74] != 0 || buf[82] != 0 || buf[126] != 0 || buf[127] != 0)
throw new MacBinaryException("Zero padding is not zero.");
// MacBinary version of this file.
if (version == Version.MacBinaryII && buf[122] != 129)
throw new MacBinaryException("Version field corrupt for a MacBinary II file.");
if (version == Version.MacBinaryIII && buf[122] != 130)
{
if (buf[122] == 129)
version = Version.MacBinaryII;
else
throw new MacBinaryException("Version field corrupt for a MacBinary III file.");
}
// CRC at the end of the header
int crc = MacUtil.read16(buf, 124);
// FIXME: check CRC
if (crc == 0)
version = Version.MacBinaryI;
// File name
int namelen = buf[1];
if (namelen < 1 || namelen > 63)
throw new MacBinaryException("Invalid file length.");
filename = MacUtil.readString(buf, 2, namelen);
// File type
filetype = MacUtil.readString(buf, 65, 4);
// File creator
filecreator = MacUtil.readString(buf, 69, 4);
// Finder flags
finderflags = buf[73];
// Window position
windowposy = MacUtil.read16(buf, 75);
windowposx = MacUtil.read16(buf, 77);
// Window or folder ID
windowid = MacUtil.read16(buf, 79);
// Protected flag
protectedflag = (buf[81] & 1) == 1;
// Data en resource fork lengths
int datlen = MacUtil.read32(buf, 83);
int reslen = MacUtil.read32(buf, 87);
// Creation and modification dates
ctime = MacUtil.read32(buf, 91);
mtime = MacUtil.read32(buf, 95);
int commentlen = 0;
int secheaderlen = 0;
if (version != Version.MacBinaryI)
{
// Get Info comment length
commentlen = MacUtil.read16(buf, 99);
// Finder flags
finderflags2 = buf[101];
if (version != Version.MacBinaryII)
{
// Finder fxInfo fields
fxScript = buf[106];
fdXFlags = buf[107];
}
// Length of total files when packed files are unpacked. (never really used)
//int unpackedlen = read32(buf, 117);
// Length of secondary header.
secheaderlen = MacUtil.read16(buf, 120);
// Minimum version to support in order to read this file (ignored)
//int minversion = buf[123];
}
// Skip the secondary header
if (secheaderlen > 0)
{
// Round up to 128 bytes
secheaderlen = (int)Math.Ceiling((double)secheaderlen / 128) * 128;
input.Seek(secheaderlen, SeekOrigin.Current);
}
// Read data fork
dat = new byte[datlen];
if (input.Read(dat, 0, datlen) != datlen)
throw new MacBinaryException("Could not read data fork.");
// Round up to 128 bytes and skip padding
long temp = (int)Math.Ceiling((double)datlen / 128) * 128 - datlen;
input.Seek(temp, SeekOrigin.Current);
// Read the resource fork
temp = input.Position + (int)Math.Ceiling((double)reslen / 128) * 128;
res = new MacResourceFork(input);
input.Seek(temp, SeekOrigin.Begin);
if (commentlen > 0)
{
buf = new byte[commentlen];
if (input.Read(buf, 0, commentlen) != commentlen)
throw new MacBinaryException("Could not read Get Info comment.");
comment = MacUtil.readString(buf, 0, commentlen);
}
}
public MacBinary(Stream input)
{
byte[] buf = new byte[128];
if (input.Read(buf, 0, 128) != 128)
{
throw new MacBinaryException("Could not read header.");
}
version = Version.MacBinaryIII;
// Version
if (buf[0] != 0)
{
throw new MacBinaryException("Incompatible version.");
}
// Signature 'mBIN'
if (buf[102] != 'm' || buf[103] != 'B' || buf[104] != 'I' || buf[105] != 'N')
{
version = Version.MacBinaryII;
}
// Zero padding
if (buf[74] != 0 || buf[82] != 0 || buf[126] != 0 || buf[127] != 0)
{
throw new MacBinaryException("Zero padding is not zero.");
}
// MacBinary version of this file.
if (version == Version.MacBinaryII && buf[122] != 129)
{
throw new MacBinaryException("Version field corrupt for a MacBinary II file.");
}
if (version == Version.MacBinaryIII && buf[122] != 130)
{
if (buf[122] == 129)
{
version = Version.MacBinaryII;
}
else
{
throw new MacBinaryException("Version field corrupt for a MacBinary III file.");
}
}
// CRC at the end of the header
int crc = MacUtil.read16(buf, 124);
// FIXME: check CRC
if (crc == 0)
{
version = Version.MacBinaryI;
}
// File name
int namelen = buf[1];
if (namelen < 1 || namelen > 63)
{
throw new MacBinaryException("Invalid file length.");
}
filename = MacUtil.readString(buf, 2, namelen);
// File type
filetype = MacUtil.readString(buf, 65, 4);
// File creator
filecreator = MacUtil.readString(buf, 69, 4);
// Finder flags
finderflags = buf[73];
// Window position
windowposy = MacUtil.read16(buf, 75);
windowposx = MacUtil.read16(buf, 77);
// Window or folder ID
windowid = MacUtil.read16(buf, 79);
// Protected flag
protectedflag = (buf[81] & 1) == 1;
// Data en resource fork lengths
int datlen = MacUtil.read32(buf, 83);
int reslen = MacUtil.read32(buf, 87);
// Creation and modification dates
ctime = MacUtil.read32(buf, 91);
mtime = MacUtil.read32(buf, 95);
int commentlen = 0;
int secheaderlen = 0;
if (version != Version.MacBinaryI)
{
// Get Info comment length
commentlen = MacUtil.read16(buf, 99);
// Finder flags
finderflags2 = buf[101];
if (version != Version.MacBinaryII)
{
// Finder fxInfo fields
fxScript = buf[106];
fdXFlags = buf[107];
}
// Length of total files when packed files are unpacked. (never really used)
//int unpackedlen = read32(buf, 117);
// Length of secondary header.
secheaderlen = MacUtil.read16(buf, 120);
// Minimum version to support in order to read this file (ignored)
//int minversion = buf[123];
}
// Skip the secondary header
if (secheaderlen > 0)
{
// Round up to 128 bytes
secheaderlen = (int)Math.Ceiling((double)secheaderlen / 128) * 128;
input.Seek(secheaderlen, SeekOrigin.Current);
}
// Read data fork
dat = new byte[datlen];
if (input.Read(dat, 0, datlen) != datlen)
{
throw new MacBinaryException("Could not read data fork.");
}
// Round up to 128 bytes and skip padding
long temp = (int)Math.Ceiling((double)datlen / 128) * 128 - datlen;
input.Seek(temp, SeekOrigin.Current);
// Read the resource fork
temp = input.Position + (int)Math.Ceiling((double)reslen / 128) * 128;
res = new MacResourceFork(input);
input.Seek(temp, SeekOrigin.Begin);
if (commentlen > 0)
{
buf = new byte[commentlen];
if (input.Read(buf, 0, commentlen) != commentlen)
{
throw new MacBinaryException("Could not read Get Info comment.");
}
comment = MacUtil.readString(buf, 0, commentlen);
}
}
