117 строки
2.7 KiB
C#
117 строки
2.7 KiB
C#
using System;
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using System.IO;
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using System.Linq;
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using System.Collections.Generic;
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using Microsoft.Build.Framework;
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// Disable until we get around to enable + fix any issues.
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#nullable disable
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namespace Xamarin.MacDev.Tasks {
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public static class AssetPackUtils {
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const string Base36Alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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const int HashEverythingLimit = 96;
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static unsafe ulong ComputeHash (string tags)
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{
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var value = (ulong) tags.Length;
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char [] buffer;
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if (tags.Length > HashEverythingLimit) {
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buffer = new char [HashEverythingLimit];
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int index = 0;
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while (index < 32) {
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buffer [index] = tags [index];
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index++;
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}
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for (int i = (tags.Length >> 1) - 16; i < 32; i++)
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buffer [index++] = tags [i];
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for (int i = tags.Length - 32; i < tags.Length; i++)
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buffer [index++] = tags [i];
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} else {
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buffer = tags.ToCharArray ();
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}
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fixed (char* bufptr = buffer) {
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ushort* end4 = ((ushort*) bufptr) + (tags.Length & ~3);
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ushort* end = ((ushort*) bufptr) + tags.Length;
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ushort* cur = (ushort*) bufptr;
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while (cur < end4) {
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value = (value * 67503105) + (ulong) (cur [0] * 16974593) + (ulong) (cur [1] * 66049) + (ulong) (cur [2] * 257) + (ulong) cur [3];
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cur += 4;
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}
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while (cur < end) {
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value = (value * 257) + (ulong) *cur;
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cur++;
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}
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}
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return value + (value << (tags.Length & 31));
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}
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static string Base36Encode (ulong value)
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{
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var encoded = new char [13];
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int index = 12;
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do {
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encoded [index--] = Base36Alphabet [(int) (value % 36)];
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value /= 36;
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} while (value != 0);
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while (index >= 0)
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encoded [index--] = '0';
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return new string (encoded, 0, 13);
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}
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public static string [] ParseTags (string value)
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{
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if (string.IsNullOrEmpty (value))
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return new string [0];
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return value.Split (new [] { ',' }, StringSplitOptions.RemoveEmptyEntries).Select (tag => tag.Trim ()).ToArray ();
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}
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public static IList<string> GetResourceTags (ITaskItem item)
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{
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var tags = ParseTags (item.GetMetadata ("ResourceTags"));
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if (tags.Length == 0)
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return null;
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Array.Sort (tags, StringComparer.Ordinal);
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return tags;
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}
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public static string GetAssetPackDirectory (string outputPath, string bundleIdentifier, IList<string> tags, out string hash)
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{
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bool addHash = false;
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string id;
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for (int i = 0; i < tags.Count; i++) {
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if (tags [i].IndexOf ('+') != -1) {
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addHash = true;
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break;
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}
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}
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hash = Base36Encode (ComputeHash (string.Join (" ", tags)));
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id = string.Join ("+", tags);
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if (addHash)
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id += "+" + hash;
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return Path.Combine (outputPath, "OnDemandResources", bundleIdentifier + "." + id + ".assetpack");
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}
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}
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}
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