public static IntPtr Allocate(SVMParameter x)
{
if (x == null)
return IntPtr.Zero;
svm_parameter y = new svm_parameter();
y.svm_type = (int)x.Type;
y.kernel_type = (int)x.Kernel;
y.degree = x.Degree;
y.gamma = x.Gamma;
y.coef0 = x.Coef0;
y.cache_size = x.CacheSize;
y.eps = x.Eps;
y.C = x.C;
y.nu = x.Nu;
y.p = x.P;
y.shrinking = x.Shrinking ? 1 : 0;
y.probability = x.Probability ? 1 : 0;
y.nr_weight = x.WeightLabels.Length;
y.weight_label = IntPtr.Zero;
if (y.nr_weight > 0)
{
y.weight_label = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(int)) * x.WeightLabels.Length);
Marshal.Copy(x.WeightLabels, 0, y.weight_label, x.WeightLabels.Length);
}
y.weight = IntPtr.Zero;
if (y.nr_weight > 0)
{
y.weight = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(double)) * x.Weights.Length);
Marshal.Copy(x.Weights, 0, y.weight, x.Weights.Length);
}
int size = Marshal.SizeOf(y);
IntPtr ptr = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(y, ptr, true);
return ptr;
}
public static void Free(svm_parameter x)
{
Marshal.FreeHGlobal(x.weight);
x.weight = IntPtr.Zero;
Marshal.FreeHGlobal(x.weight_label);
x.weight_label = IntPtr.Zero;
}
public static SVMParameter Convert(svm_parameter x)
{
SVMParameter y = new SVMParameter();
y.Type = (SVMType)x.svm_type;
y.Kernel = (SVMKernelType)x.kernel_type;
y.Degree = x.degree;
y.Gamma = x.gamma;
y.Coef0 = x.coef0;
y.CacheSize = x.cache_size;
y.Eps = x.eps;
y.C = x.C;
y.Nu = x.nu;
y.P = x.p;
y.Shrinking = x.shrinking != 0;
y.Probability = x.probability != 0;
int length = x.nr_weight;
y.WeightLabels = new int[length];
if (length > 0)
Marshal.Copy(x.weight_label, y.WeightLabels, 0, length);
y.Weights = new double[length];
if (length > 0)
Marshal.Copy(x.weight, y.Weights, 0, length);
return y;
}
