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Co-authored-by: Jonathan Peppers <jonathan.peppers@gmail.com>
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160 changes: 160 additions & 0 deletions
160
src/Xamarin.Android.Build.Tasks/Tasks/GenerateJniRemappingNativeCode.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| using System; | ||
| using System.IO; | ||
| using System.Collections.Generic; | ||
| using System.Xml; | ||
|
|
||
| using Microsoft.Build.Framework; | ||
| using Microsoft.Build.Utilities; | ||
| using Microsoft.Android.Build.Tasks; | ||
|
|
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| namespace Xamarin.Android.Tasks | ||
| { | ||
| public class GenerateJniRemappingNativeCode : AndroidTask | ||
| { | ||
| internal const string JniRemappingNativeCodeInfoKey = ".:!JniRemappingNativeCodeInfo!:."; | ||
|
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| internal sealed class JniRemappingNativeCodeInfo | ||
| { | ||
| public int ReplacementTypeCount { get; } | ||
| public int ReplacementMethodIndexEntryCount { get; } | ||
|
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| public JniRemappingNativeCodeInfo (int replacementTypeCount, int replacementMethodIndexEntryCount) | ||
| { | ||
| ReplacementTypeCount = replacementTypeCount; | ||
| ReplacementMethodIndexEntryCount = replacementMethodIndexEntryCount; | ||
| } | ||
| } | ||
|
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| public override string TaskPrefix => "GJRNC"; | ||
|
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| public ITaskItem RemappingXmlFilePath { get; set; } | ||
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| [Required] | ||
| public string OutputDirectory { get; set; } | ||
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| [Required] | ||
| public string [] SupportedAbis { get; set; } | ||
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| public bool GenerateEmptyCode { get; set; } | ||
|
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| public override bool RunTask () | ||
| { | ||
| if (!GenerateEmptyCode) { | ||
| if (RemappingXmlFilePath == null) { | ||
| throw new InvalidOperationException ("RemappingXmlFilePath parameter is required"); | ||
| } | ||
|
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| Generate (); | ||
| } else { | ||
| GenerateEmpty (); | ||
| } | ||
|
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| return !Log.HasLoggedErrors; | ||
| } | ||
|
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| void GenerateEmpty () | ||
| { | ||
| Generate (new JniRemappingAssemblyGenerator (), typeReplacementsCount: 0); | ||
| } | ||
|
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| void Generate () | ||
| { | ||
| var typeReplacements = new List<JniRemappingTypeReplacement> (); | ||
| var methodReplacements = new List<JniRemappingMethodReplacement> (); | ||
|
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| var readerSettings = new XmlReaderSettings { | ||
| XmlResolver = null, | ||
| }; | ||
|
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| using (var reader = XmlReader.Create (File.OpenRead (RemappingXmlFilePath.ItemSpec), readerSettings)) { | ||
| if (reader.MoveToContent () != XmlNodeType.Element || reader.LocalName != "replacements") { | ||
| Log.LogError ($"Input file `{RemappingXmlFilePath.ItemSpec}` does not start with `<replacements/>`"); | ||
| } else { | ||
| ReadXml (reader, typeReplacements, methodReplacements); | ||
| } | ||
| } | ||
|
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| Generate (new JniRemappingAssemblyGenerator (typeReplacements, methodReplacements), typeReplacements.Count); | ||
| } | ||
|
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| void Generate (JniRemappingAssemblyGenerator jniRemappingGenerator, int typeReplacementsCount) | ||
| { | ||
| jniRemappingGenerator.Init (); | ||
|
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| foreach (string abi in SupportedAbis) { | ||
| string baseAsmFilePath = Path.Combine (OutputDirectory, $"jni_remap.{abi.ToLowerInvariant ()}"); | ||
| string llFilePath = $"{baseAsmFilePath}.ll"; | ||
|
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| using (var sw = MemoryStreamPool.Shared.CreateStreamWriter ()) { | ||
| jniRemappingGenerator.Write (GeneratePackageManagerJava.GetAndroidTargetArchForAbi (abi), sw, llFilePath); | ||
| sw.Flush (); | ||
| Files.CopyIfStreamChanged (sw.BaseStream, llFilePath); | ||
| } | ||
| } | ||
|
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| BuildEngine4.RegisterTaskObjectAssemblyLocal ( | ||
| JniRemappingNativeCodeInfoKey, | ||
| new JniRemappingNativeCodeInfo (typeReplacementsCount, jniRemappingGenerator.ReplacementMethodIndexEntryCount), | ||
| RegisteredTaskObjectLifetime.Build | ||
| ); | ||
| } | ||
|
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| void ReadXml (XmlReader reader, List<JniRemappingTypeReplacement> typeReplacements, List<JniRemappingMethodReplacement> methodReplacements) | ||
| { | ||
| bool haveAllAttributes; | ||
|
|
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| while (reader.Read ()) { | ||
| if (reader.NodeType != XmlNodeType.Element) { | ||
| continue; | ||
| } | ||
|
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| haveAllAttributes = true; | ||
| if (String.Compare ("replace-type", reader.LocalName, StringComparison.Ordinal) == 0) { | ||
| haveAllAttributes &= GetRequiredAttribute ("from", out string from); | ||
| haveAllAttributes &= GetRequiredAttribute ("to", out string to); | ||
| if (!haveAllAttributes) { | ||
| continue; | ||
| } | ||
|
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| typeReplacements.Add (new JniRemappingTypeReplacement (from, to)); | ||
| } else if (String.Compare ("replace-method", reader.LocalName, StringComparison.Ordinal) == 0) { | ||
| haveAllAttributes &= GetRequiredAttribute ("source-type", out string sourceType); | ||
| haveAllAttributes &= GetRequiredAttribute ("source-method-name", out string sourceMethodName); | ||
| haveAllAttributes &= GetRequiredAttribute ("target-type", out string targetType); | ||
| haveAllAttributes &= GetRequiredAttribute ("target-method-name", out string targetMethodName); | ||
| haveAllAttributes &= GetRequiredAttribute ("target-method-instance-to-static", out string targetIsStatic); | ||
|
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| if (!haveAllAttributes) { | ||
| continue; | ||
| } | ||
|
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| if (!Boolean.TryParse (targetIsStatic, out bool isStatic)) { | ||
| Log.LogError ($"Attribute 'target-method-instance-to-static' in element '{reader.LocalName}' value '{targetIsStatic}' cannot be parsed as boolean; {RemappingXmlFilePath.ItemSpec} line {GetCurrentLineNumber ()}"); | ||
| continue; | ||
| } | ||
|
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| string sourceMethodSignature = reader.GetAttribute ("source-method-signature"); | ||
| methodReplacements.Add ( | ||
| new JniRemappingMethodReplacement ( | ||
| sourceType, sourceMethodName, sourceMethodSignature, | ||
| targetType, targetMethodName, isStatic | ||
| ) | ||
| ); | ||
| } | ||
| } | ||
|
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| bool GetRequiredAttribute (string attributeName, out string attributeValue) | ||
| { | ||
| attributeValue = reader.GetAttribute (attributeName); | ||
| if (!String.IsNullOrEmpty (attributeValue)) { | ||
| return true; | ||
| } | ||
|
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| Log.LogError ($"Attribute '{attributeName}' missing from element '{reader.LocalName}'; {RemappingXmlFilePath.ItemSpec} line {GetCurrentLineNumber ()}"); | ||
| return false; | ||
| } | ||
|
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| int GetCurrentLineNumber () => ((IXmlLineInfo)reader).LineNumber; | ||
| } | ||
| } | ||
| } |
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