private static void UpdateWeights(IntPtr weightUpdaterHandle,
IReadOnlyList <IReadOnlyList <string> > tuneTargetCorpus, HashSet <TranslationInfo>[] nbestLists,
float[] curWeights)
{
IntPtr[] nativeTuneTargetCorpus = tuneTargetCorpus.Select(Thot.ConvertStringsToNativeUtf8).ToArray();
int sizeOfPtr = Marshal.SizeOf <IntPtr>();
int sizeOfDouble = Marshal.SizeOf <double>();
IntPtr nativeNBestLists = Marshal.AllocHGlobal(nbestLists.Length * sizeOfPtr);
IntPtr nativeScoreComps = Marshal.AllocHGlobal(nbestLists.Length * sizeOfPtr);
var nativeNBestListLens = new uint[nbestLists.Length];
for (int i = 0; i < nbestLists.Length; i++)
{
IntPtr nativeNBestList = Marshal.AllocHGlobal(nbestLists[i].Count * sizeOfPtr);
IntPtr nativeListScoreComps = Marshal.AllocHGlobal(nbestLists[i].Count * sizeOfPtr);
int j = 0;
foreach (TranslationInfo ti in nbestLists[i])
{
IntPtr nativeSegment = Thot.ConvertStringsToNativeUtf8(ti.Translation);
Marshal.WriteIntPtr(nativeNBestList, j * sizeOfPtr, nativeSegment);
IntPtr nativeTransScoreComps = Marshal.AllocHGlobal((ti.ScoreComponents.Length - 1) * sizeOfDouble);
Marshal.Copy(ti.ScoreComponents, 0, nativeTransScoreComps, ti.ScoreComponents.Length - 1);
Marshal.WriteIntPtr(nativeListScoreComps, j * sizeOfPtr, nativeTransScoreComps);
j++;
}
Marshal.WriteIntPtr(nativeNBestLists, i * sizeOfPtr, nativeNBestList);
Marshal.WriteIntPtr(nativeScoreComps, i * sizeOfPtr, nativeListScoreComps);
nativeNBestListLens[i] = (uint)nbestLists[i].Count;
}
try
{
Thot.llWeightUpdater_updateClosedCorpus(weightUpdaterHandle, nativeTuneTargetCorpus, nativeNBestLists,
nativeScoreComps, nativeNBestListLens,
curWeights, (uint)nbestLists.Length, (uint)curWeights.Length - 1);
}
finally
{
foreach (IntPtr nativeSegment in nativeTuneTargetCorpus)
{
Marshal.FreeHGlobal(nativeSegment);
}
for (int i = 0; i < nbestLists.Length; i++)
{
IntPtr nativeNBestList = Marshal.ReadIntPtr(nativeNBestLists, i * sizeOfPtr);
IntPtr nativeListScoreComps = Marshal.ReadIntPtr(nativeScoreComps, i * sizeOfPtr);
for (int j = 0; j < nbestLists[i].Count; j++)
{
IntPtr nativeSegment = Marshal.ReadIntPtr(nativeNBestList, j * sizeOfPtr);
Marshal.FreeHGlobal(nativeSegment);
IntPtr nativeTransScoreComps = Marshal.ReadIntPtr(nativeListScoreComps, j * sizeOfPtr);
Marshal.FreeHGlobal(nativeTransScoreComps);
}
Marshal.FreeHGlobal(nativeNBestList);
Marshal.FreeHGlobal(nativeListScoreComps);
}
Marshal.FreeHGlobal(nativeNBestLists);
Marshal.FreeHGlobal(nativeScoreComps);
}
}