public static bool UnmarshalPmglHeader(ref byte[] pData, ref uint pDataPos,
ref uint pDataLen, ref chmPmglHeader dest)
{
/* we only know how to deal with a 0x14 byte structures */
if (pDataLen != CHM_PMGL_LEN)
{
return(false);
}
InitialisePmglHeader(ref dest);
/* unmarshal fields */
Unmarshal.ToCharArray(ref pData, ref pDataPos, ref pDataLen, ref dest.signature, 4);
Unmarshal.ToUInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.free_space);
Unmarshal.ToUInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.unknown_0008);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.block_prev);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.block_next);
/* check structure */
if (new String(dest.signature, 0, 4).CompareTo(CHM_PMGL_MARKER) != 0)
{
return(false);
}
return(true);
}
public static bool UnmarshalItpfHeader(ref byte[] pData, ref uint pDataPos,
ref uint pDataLen, ref chmItspHeader dest)
{
/* we only know how to deal with a 0x54 byte structures */
if (pDataLen != CHM_ITSP_V1_LEN)
{
return(false);
}
InitialiseItspHeader(ref dest);
/* unmarshal fields */
Unmarshal.ToCharArray(ref pData, ref pDataPos, ref pDataLen, ref dest.signature, 4);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.version);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.header_len);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.unknown_000c);
Unmarshal.ToUInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.block_len);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.blockidx_intvl);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.index_depth);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.index_root);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.index_head);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.unknown_0024);
Unmarshal.ToUInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.num_blocks);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.unknown_002c);
Unmarshal.ToUInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.lang_id);
Unmarshal.ToUuid(ref pData, ref pDataPos, ref pDataLen, ref dest.system_uuid);
Unmarshal.ToByteArray(ref pData, ref pDataPos, ref pDataLen, ref dest.unknown_0044, 16);
/* error check the data */
if (new String(dest.signature).CompareTo("ITSP\0") != 0)
{
return(false);
}
if (dest.version != 1)
{
return(false);
}
if (dest.header_len != CHM_ITSP_V1_LEN)
{
return(false);
}
return(true);
}
public static SystemFile Read(ChmFile f)
{
List <SystemFileEntry> sfelst = new List <SystemFileEntry>();
ChmUnitInfo ui = new ChmUnitInfo();
byte[] buf;
uint pos = 0, remaining = 0;
if (!f.ResolveObject("/#SYSTEM", ref ui))
{
throw new InvalidOperationException("Could not find SYSTEM file in CHM!");
}
buf = new byte[ui.length];
remaining = (uint)buf.Length;
if (f.RetrieveObject(ui, ref buf, 0, (long)ui.length) == 0)
{
throw new InvalidOperationException("Could not read SYSTEM file in CHM!");
}
Int32 version = 0;
Unmarshal.ToInt32(ref buf, ref pos, ref remaining, ref version);
for ( ; pos < buf.Length;)
{
SystemFileEntry sfe = new SystemFileEntry();
Unmarshal.ToUInt16(ref buf, ref pos, ref remaining, ref sfe.code);
Unmarshal.ToUInt16(ref buf, ref pos, ref remaining, ref sfe.length);
sfe.data = new byte[sfe.length];
Array.Copy(buf, pos, sfe.data, 0, sfe.length);
pos += sfe.length;
remaining -= sfe.length;
sfelst.Add(sfe);
}
return(new SystemFile(version, sfelst.ToArray()));
}
public static bool UnmarshalItsfHeader(ref byte[] pData, ref uint pDataPos,
ref uint pDataLen, ref chmItsfHeader dest)
{
/* we only know how to deal with the 0x58 and 0x60 byte structures */
if (pDataLen != CHM_ITSF_V2_LEN && pDataLen != CHM_ITSF_V3_LEN)
{
return(false);
}
InitialiseItsfHeader(ref dest);
/* unmarshal common fields */
Unmarshal.ToCharArray(ref pData, ref pDataPos, ref pDataLen, ref dest.signature, 4);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.version);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.header_len);
Unmarshal.ToInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.unknown_000c);
Unmarshal.ToUInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.last_modified);
Unmarshal.ToUInt32(ref pData, ref pDataPos, ref pDataLen, ref dest.lang_id);
Unmarshal.ToUuid(ref pData, ref pDataPos, ref pDataLen, ref dest.dir_uuid);
Unmarshal.ToUuid(ref pData, ref pDataPos, ref pDataLen, ref dest.stream_uuid);
Unmarshal.ToUInt64(ref pData, ref pDataPos, ref pDataLen, ref dest.unknown_offset);
Unmarshal.ToUInt64(ref pData, ref pDataPos, ref pDataLen, ref dest.unknown_len);
Unmarshal.ToUInt64(ref pData, ref pDataPos, ref pDataLen, ref dest.dir_offset);
Unmarshal.ToUInt64(ref pData, ref pDataPos, ref pDataLen, ref dest.dir_len);
/* error check the data */
/* XXX: should also check UUIDs, probably, though with a version 3 file,
* current MS tools do not seem to use them.
*/
if (new String(dest.signature).CompareTo("ITSF") != 0)
{
return(false);
}
if (dest.version == 2)
{
if (dest.header_len < CHM_ITSF_V2_LEN)
{
return(false);
}
}
else if (dest.version == 3)
{
if (dest.header_len < CHM_ITSF_V3_LEN)
{
return(false);
}
}
else
{
return(false);
}
/* now, if we have a V3 structure, unmarshal the rest.
* otherwise, compute it
*/
if (dest.version == 3)
{
if (pDataLen != 0)
{
Unmarshal.ToUInt64(ref pData, ref pDataPos, ref pDataLen, ref dest.data_offset);
}
else
{
return(false);
}
}
else
{
dest.data_offset = dest.dir_offset + dest.dir_len;
}
return(true);
}