/// <summary>
/// Calculates the revision check for the specified files.
/// </summary>
/// <param name="valueString">The value string for the check revision function specified by Battle.net's SID_AUTH_INFO message.</param>
/// <param name="files">The list of files for the given game client. This parameter must be exactly three files long.</param>
/// <param name="mpqNumber">The number of the MPQ file. To extract this number, see the
/// <see cref="ExtractMPQNumber(String)">ExtractMPQNumber</see> method.</param>
/// <returns>The checksum value.</returns>
/// <exception cref="ArgumentNullException">Thrown if the <i>valueString</i> or <i>files</i> parameters are <b>null</b>
/// (<b>Nothing</b> in Visual Basic).</exception>
/// <exception cref="ArgumentOutOfRangeException">Thrown if <paramref name="files" /> is not a 3-string array, or if
/// <paramref name="mpqNumber" /> is outside of the range of 0 to 7, inclusive.</exception>
/// <exception cref="FileNotFoundException">Thrown if one of the specified game files is not found.</exception>
/// <exception cref="IOException">Thrown in the event of a general I/O error.</exception>
/// <remarks>
/// <para>The file list for this is product-specific and order-specific:</para>
/// <list type="table">
/// <listheader>
/// <term>Product</term>
/// <description>File list</description>
/// </listheader>
/// <item>
/// <term>Starcraft; Starcraft: Brood War</term>
/// <description>
/// <list type="bullet">
/// <item>
/// <description>Starcraft.exe</description>
/// </item>
/// <item>
/// <description>storm.dll</description>
/// </item>
/// <item>
/// <description>battle.snp</description>
/// </item>
/// </list>
/// </description>
/// </item>
/// <item>
/// <term>Warcraft II: Battle.net Edition</term>
/// <description>
/// <list type="bullet">
/// <item>
/// <description>Warcraft II BNE.exe</description>
/// </item>
/// <item>
/// <description>storm.dll</description>
/// </item>
/// <item>
/// <description>battle.snp</description>
/// </item>
/// </list>
/// </description>
/// </item>
/// <item>
/// <term>Diablo II; Diablo II: Lord of Destruction</term>
/// <description>
/// <list type="bullet">
/// <item>
/// <description>Game.exe</description>
/// </item>
/// <item>
/// <description>Bnclient.dll</description>
/// </item>
/// <item>
/// <description>D2Client.dll</description>
/// </item>
/// </list>
/// </description>
/// </item>
/// <item>
/// <term>Warcraft III: The Reign of Chaos; Warcraft III: The Frozen Throne</term>
/// <description>
/// <list type="bullet">
/// <item>
/// <description>War3.exe</description>
/// </item>
/// <item>
/// <description>storm.dll</description>
/// </item>
/// <item>
/// <description>Game.dll</description>
/// </item>
/// </list>
/// </description>
/// </item>
/// </list>
/// </remarks>
public static int DoCheckRevision(
string valueString,
IEnumerable <Stream> files,
int mpqNumber)
{
if (valueString == null)
{
throw new ArgumentNullException("valueString");
}
if (files == null)
{
throw new ArgumentNullException("files");
}
if (files.Count() != 3)
{
throw new ArgumentOutOfRangeException("files", files, "The file list is invalid.");
}
if (mpqNumber < 0 || mpqNumber > 7)
{
throw new ArgumentOutOfRangeException("mpqNumber", mpqNumber, "MPQ number must be between 0 and 7, inclusive.");
}
using (Stream crStream = new CheckRevisionStream(files))
{
uint A, B, C;
List <string> formulas = new List <string>();
CheckRevisionFormulaTracker.InitializeValues(valueString, formulas, out A, out B, out C);
A ^= hashcodes[mpqNumber];
int result = DoCheckRevisionCompiled(A, B, C, formulas, crStream);
return(result);
}
}
// This method assumes all parameters have been sanity checked
private static int DoCheckRevisionCompiled(
uint A,
uint B,
uint C,
IEnumerable <string> crevFormulas,
Stream completeDataStream)
{
StandardCheckRevisionImplementation impl = CheckRevisionFormulaTracker.GetImplementation(crevFormulas);
using (BinaryReader br = new BinaryReader(completeDataStream))
{
uint S;
while (br.BaseStream.Position < br.BaseStream.Length)
{
S = br.ReadUInt32();
impl(ref A, ref B, ref C, ref S);
}
}
return(unchecked ((int)C));
}