Embed Sike data in source to make it trim-friendly

[Rob-Hague]

Follow-up to 76e2475 (#534), this time for the constant Sike data.

In the same test app on top of the same branch:

	before #534	after #534	now
untrimmed	6989 KB	6975 KB	6892 KB
trimmed	3993 KB	2791 KB	564 KB

i.e. the assembly trims nicely there with no cost to the untrimmed size.

As before, the source code was generated by reflecting over instances of the existing classes:

using Org.BouncyCastle.Pqc.Crypto.Sike;
using System;
using System.CodeDom.Compiler;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;

P434 lc = new(isCompressed: true);

string[] bz2FieldNames =
[
    "ph2_path",
    "ph3_path",
    "A_gen",
    "B_gen",
    "XQB3",
    "A_basis_zero",
    "B_basis_zero",
    "B_gen_3_tors",
    "g_R_S_im",
    "g_phiR_phiS_re",
    "g_phiR_phiS_im",
    "Montgomery_RB1",
    "Montgomery_RB2",
    "threeinv",
    "u_entang",
    "u0_entang",
    "table_r_qr",
    "table_r_qnr",
    "table_v_qr",
    "table_v_qnr",
    "v_3_torsion",
    "T_tate3",
    "T_tate2_firststep_P",
    "T_tate2_P",
    "T_tate2_firststep_Q",
    "T_tate2_Q",
    "ph2_T",
    "ph3_T1",
    "ph3_T2",
];

FieldInfo[] fields = lc.GetType().GetFields(BindingFlags.NonPublic | BindingFlags.Instance);

using StreamWriter sw = new(@"C:\tmp\out.txt");
using IndentedTextWriter tw = new(sw);

tw.Indent++; //class
tw.WriteLine(); // to get tabs on next line

foreach (string fieldName in bz2FieldNames)
{
    FieldInfo field = fields.Single(f => f.Name == fieldName);

    if (field.FieldType == typeof(uint[]))
    {
        uint[] data = (uint[])field.GetValue(lc);

        int nonZeroDataLength = data.AsSpan().LastIndexOfAnyExcept(0u) + 1;

        tw.WriteLine($"private static readonly uint[] s_{field.Name} = new uint[{nonZeroDataLength}]");
        tw.WriteLine("{");
        tw.Indent++;

        foreach (uint[] chunk in data.Take(nonZeroDataLength).Chunk(8))
        {
            tw.Write("0x");
            tw.Write(string.Join(", 0x", chunk.Select(u => u.ToString("X8"))));
            tw.WriteLine(",");
        }

        tw.Indent--;
        tw.WriteLine("};");
        tw.WriteLine();
    }
    else if (field.FieldType == typeof(ulong[]))
    {
        ulong[] data = (ulong[])field.GetValue(lc);

        int nonZeroDataLength = data.AsSpan().LastIndexOfAnyExcept(0u) + 1;

        tw.WriteLine($"private static readonly ulong[] s_{field.Name} = new ulong[{nonZeroDataLength}]");
        tw.WriteLine("{");
        tw.Indent++;

        foreach (ulong[] chunk in data.Take(nonZeroDataLength).Chunk(4))
        {
            tw.Write("0x");
            tw.Write(string.Join(", 0x", chunk.Select(u => u.ToString("X16"))));
            tw.WriteLine(",");
        }

        tw.Indent--;
        tw.WriteLine("};");
        tw.WriteLine();
    }
    else if (field.FieldType == typeof(ulong[][]))
    {
        ulong[][] data = (ulong[][])field.GetValue(lc);

        tw.WriteLine($"private static readonly ulong[][] s_{field.Name} = new ulong[{data.Length}][]");
        tw.WriteLine("{");
        tw.Indent++;
        for (int i = 0; i < data.Length; i++)
        {
            int nonZeroDataLength = data[i].AsSpan().LastIndexOfAnyExcept(0u) + 1;

            tw.WriteLine($"new ulong[{nonZeroDataLength}]");
            tw.WriteLine("{");
            tw.Indent++;

            foreach (ulong[] chunk in data[i].Take(nonZeroDataLength).Chunk(4))
            {
                tw.Write("0x");
                tw.Write(string.Join(", 0x", chunk.Select(u => u.ToString("X16"))));
                tw.WriteLine(",");
            }

            tw.Indent--;
            tw.WriteLine("},");

        }
        tw.Indent--;
        tw.WriteLine("};");
        tw.WriteLine();
    }
    else if (field.FieldType == typeof(ulong[][][]))
    {
        ulong[][][] data = (ulong[][][])field.GetValue(lc);

        tw.WriteLine($"private static readonly ulong[][][] s_{field.Name} = new ulong[{data.Length}][][]");
        tw.WriteLine("{");
        tw.Indent++;
        for (int i = 0; i < data.Length; i++)
        {
            tw.WriteLine($"new ulong[{data[i].Length}][]");
            tw.WriteLine("{");
            tw.Indent++;

            for (int j = 0; j < data[i].Length; j++)
            {
                int nonZeroDataLength = data[i][j].AsSpan().LastIndexOfAnyExcept(0u) + 1;

                tw.WriteLine($"new ulong[{nonZeroDataLength}]");
                tw.WriteLine("{");
                tw.Indent++;

                foreach (ulong[] chunk in data[i][j].Take(nonZeroDataLength).Chunk(4))
                {
                    tw.Write("0x");
                    tw.Write(string.Join(", 0x", chunk.Select(u => u.ToString("X16"))));
                    tw.WriteLine(",");
                }

                tw.Indent--;
                tw.WriteLine("},");
            }

            tw.Indent--;
            tw.WriteLine("},");
        }
        tw.Indent--;
        tw.WriteLine("};");
        tw.WriteLine();
    }
    else
    {
        Debug.Fail(field.FieldType.ToString());
    }
}

This would complete #422

[peterdettman]

Merged, thanks again.

[Rob-Hague]

Great, thanks