public WordGraph GetWordGraph(IReadOnlyList <string> segment)
{
CheckDisposed();
IntPtr nativeSentence = Thot.ConvertStringsToNativeUtf8(segment);
IntPtr wordGraph = IntPtr.Zero;
IntPtr nativeWordGraphStr = IntPtr.Zero;
try
{
wordGraph = Thot.decoder_getWordGraph(_decoderHandle, nativeSentence);
uint len = Thot.wg_getString(wordGraph, IntPtr.Zero, 0);
nativeWordGraphStr = Marshal.AllocHGlobal((int)len);
Thot.wg_getString(wordGraph, nativeWordGraphStr, len);
string wordGraphStr = Thot.ConvertNativeUtf8ToString(nativeWordGraphStr, len);
double initialStateScore = Thot.wg_getInitialStateScore(wordGraph);
return(CreateWordGraph(segment, wordGraphStr, initialStateScore));
}
finally
{
if (nativeWordGraphStr != IntPtr.Zero)
{
Marshal.FreeHGlobal(nativeWordGraphStr);
}
if (wordGraph != IntPtr.Zero)
{
Thot.wg_destroy(wordGraph);
}
Marshal.FreeHGlobal(nativeSentence);
}
}
private string GetWord(uint index, IntPtr nativeWordStr, ref uint capacity)
{
uint len = GetWordNative(index, nativeWordStr, capacity);
if (len > capacity)
{
capacity = len;
nativeWordStr = Marshal.ReAllocHGlobal(nativeWordStr, (IntPtr)capacity);
len = GetWordNative(index, nativeWordStr, capacity);
}
return(Thot.ConvertNativeUtf8ToString(nativeWordStr, len));
}