checkpoint

Alpm/API.cs

@@ -0,0 +1,33 @@
+using System;
+
+namespace Foodsoft.Alpm
+{
+    public static class API
+    {
+        public static readonly string Version = alpm.alpm_version();
+
+        internal static void WrapError(SafeAlpmHandle h, Func<int> f)
+        {
+            var err = f();
+            if (err != 0)
+            {
+                throw new Exception(alpm.alpm_errno(h));
+            }
+        }
+        
+        /*
+         * Handles the pattern where <0 is exceptional, but 1 is some "false"
+         * condition.
+         */
+        internal static bool WrapErrorBool(SafeAlpmHandle h, Func<int> f)
+        {
+            var err = f();
+            if (err < 0)
+            {
+                throw new Exception(alpm.alpm_errno(h));
+            }
+            return err == 0;
+        }
+
+    }
+}

Alpm/Alpm.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Module</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+    <Nullable>enable</Nullable>
+    <RootNamespace>Foodsoft.Alpm</RootNamespace>
+  </PropertyGroup>
+
+</Project>

Alpm/Backup.cs

@@ -0,0 +1,8 @@
+namespace Foodsoft.Alpm
+{
+    public struct Backup
+    {
+        private string _name;
+        private string _hash;
+    }
+}

Alpm/CachePackage.cs

@@ -0,0 +1,19 @@
+namespace Foodsoft.Alpm
+{
+    public class CachePackage : Package
+    {
+        // ReSharper disable once SuggestBaseTypeForParameter
+        internal CachePackage(SafeCachePackageHandle handle, Database db) : base(handle)
+        {
+            DB = db;
+        }
+
+        public override Database? DB { get; }
+
+        public void SetInstallReason(InstallReason reason)
+        {
+            if (alpm.alpm_pkg_set_reason(Handle, reason) != 0)
+                throw new Exception(alpm.alpm_errno(((SafeCachePackageHandle) Handle).SafeAlpmHandle));
+        }
+    }
+}

Alpm/CollectionWrapper`2.cs

@@ -0,0 +1,131 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+
+// FIXME: This is increasing the ref-count on AlpmHandle all the time, so this is NOT correct for database handles,
+// or other handles that have a dispose that is not a no-op.
+namespace Foodsoft.Alpm
+{
+    internal class CollectionWrapper<TImpl, TElement> : ICollection<TElement> where TImpl : struct,
+        IItemsAccessor<TElement>
+    {
+        private TImpl _impl;
+
+        public CollectionWrapper(TImpl impl)
+        {
+            _impl = impl;
+        }
+
+        private static unsafe IntPtr ListNext(IntPtr list) => ((alpm_list_t*) list)->next;
+        private static unsafe IntPtr ListData(IntPtr list) => ((alpm_list_t*) list)->data;
+        public IEnumerator<TElement> GetEnumerator()
+        {
+            var safeAlpmHandle = _impl.SafeAlpmHandle;
+            var release = false;
+
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try
+            {
+                safeAlpmHandle.DangerousAddRef(ref release);
+                if (!release) throw new ObjectDisposedException(_impl.GetType().FullName);
+                for (var list = _impl.GetItems(); list != IntPtr.Zero; list = ListNext(list))
+                {
+                    yield return _impl.PtrToItem(ListData(list));
+                }
+            }
+            finally
+            {
+                if (release)
+                    safeAlpmHandle.DangerousRelease();
+            }
+        }
+
+        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+
+        public void Add(TElement item)
+        {
+            _impl.AddItem(item);
+        }
+
+        public void Clear()
+        {
+            _impl.SetItems(IntPtr.Zero);
+        }
+
+
+        public bool Contains(TElement item)
+        {
+            var safeAlpmHandle = _impl.SafeAlpmHandle;
+            var release = false;
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try
+            {
+                safeAlpmHandle.DangerousAddRef(ref release);
+                return _impl.FindItem(item) != IntPtr.Zero;
+            }
+            finally
+            {
+                if (release)
+                    safeAlpmHandle.DangerousRelease();
+            }
+        }
+
+        public void CopyTo(TElement[] array, int arrayIndex)
+        {
+            var safeAlpmHandle = _impl.SafeAlpmHandle;
+            var release = false;
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try
+            {
+                safeAlpmHandle.DangerousAddRef(ref release);
+                var intPtr = _impl.GetItems();
+                unsafe
+                {
+                    for (var list = (alpm_list_t*) intPtr; list != null; list = alpm.alpm_list_next(list))
+                    {
+                        array[arrayIndex++] = _impl.PtrToItem(list->data);
+                    }
+                }
+            }
+            finally
+            {
+                if (release)
+                    safeAlpmHandle.DangerousRelease();
+            }
+        }
+
+        public bool Remove(TElement item)
+        {
+            var err = _impl.RemoveItem(item);
+            if (err < 0)
+            {
+                throw new Exception(alpm.alpm_errno(_impl.SafeAlpmHandle));
+            }
+
+            return err == 0;
+        }
+
+        public int Count
+        {
+            get
+            {
+                var safeAlpmHandle = _impl.SafeAlpmHandle;
+                var release = false;
+                RuntimeHelpers.PrepareConstrainedRegions();
+                try
+                {
+                    safeAlpmHandle.DangerousAddRef(ref release);
+                    return (int) alpm.alpm_list_count(_impl.GetItems());
+                }
+                finally
+                {
+                    if (release)
+                        safeAlpmHandle.DangerousRelease();
+                }
+            }
+        }
+
+        public bool IsReadOnly => false;
+    }
+}

Alpm/Database.cs

@@ -0,0 +1,102 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    public sealed class Database : IDisposable
+    {
+        private readonly SafeDatabaseHandle _handle;
+
+        internal Database(SafeDatabaseHandle handle) => _handle = handle;
+
+        public void Unregister()
+        {
+            try
+            {
+                API.WrapError(_handle.SafeAlpmHandle, () => alpm.alpm_db_unregister(_handle));
+            }
+            finally
+            {
+                _handle.Close();
+            }
+        }
+
+
+        private readonly struct ServersAccessor : IItemsReader<string, SafeDatabaseHandle>
+        {
+            internal ServersAccessor(SafeDatabaseHandle handle)
+            {
+                Handle = handle;
+            }
+
+            public SafeDatabaseHandle Handle { get; }
+            public IntPtr GetItems() => alpm.alpm_db_get_servers(Handle);
+            public string PtrToItem(IntPtr p) => Marshal.PtrToStringUTF8(p)!;
+        }
+
+        public void AddServer(string url) => API.WrapError(_handle.SafeAlpmHandle, () => alpm.alpm_db_add_server(_handle, url));
+
+        public bool RemoveServer(string url) => API.WrapErrorBool(_handle.SafeAlpmHandle, () => alpm.alpm_db_remove_server(_handle, url));
+
+        public IEnumerable<string> Servers
+        {
+            get => new EnumerableWrapper<ServersAccessor, string, SafeDatabaseHandle>(new ServersAccessor(_handle));
+            set
+            {
+                foreach (var s in value)
+                {
+                    API.WrapError(_handle.SafeAlpmHandle, () => alpm.alpm_db_add_server(_handle, s));
+                }
+            }
+        }
+
+        public string Name => alpm.alpm_db_get_name(_handle);
+
+        public SigLevel SigLevel => alpm.alpm_db_get_siglevel(_handle);
+
+        public ErrNo Valid =>
+            alpm.alpm_db_get_valid(_handle) != 0 ? alpm.alpm_errno(_handle.SafeAlpmHandle) : ErrNo.ERR_OK;
+
+        public bool Update(bool force = false)
+        {
+            var err = alpm.alpm_db_update(force ? 1 : 0, _handle);
+            if (err < 0)
+            {
+                throw new Exception(_handle.SafeAlpmHandle);
+            }
+
+            return err == 0;
+        }
+
+        public Package? GetPackage(string name)
+        {
+            var pkgPtr = alpm.alpm_pkg_get_pkg(_handle, name);
+            if (pkgPtr == IntPtr.Zero)
+            {
+                var err = alpm.alpm_errno(_handle.SafeAlpmHandle);
+                if (err == ErrNo.ERR_PKG_NOT_FOUND)
+                    return null;
+                throw new Exception(err);
+            }
+
+            return new CachePackage(new SafeCachePackageHandle(pkgPtr, _handle), this);
+        }
+
+        public PackageList PackageCache
+        {
+            get
+            {
+                var listPtr = alpm.alpm_db_get_pkgcache(_handle);
+                if (listPtr == IntPtr.Zero)
+                    throw new Exception(alpm.alpm_errno(_handle.SafeAlpmHandle));
+                return new PackageList(new SafeListHandle<SafeDatabaseHandle>(listPtr, _handle), this);
+            }
+        }
+
+        public void Dispose()
+        {
+            _handle.Dispose();
+        }
+    }
+}

Alpm/Depend.cs

@@ -0,0 +1,34 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+
+    
+    [StructLayout(LayoutKind.Sequential)]
+    [SuppressMessage("ReSharper", "ConvertToConstant.Local")]
+    public class Depend
+    {
+        public enum ModType
+        {
+            Any = 1,
+            Equal,
+            GreaterThanOrEqual,
+            LessThanOrEqual,
+            GreaterThan,
+            LessThan
+        }
+        
+        [field: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public string Name { get; } = null!;
+
+        [field: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public string Version { get; } = null!;
+
+        [field: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public string Description { get; } = null!;
+
+        public ulong NameHash { get; } = 0;
+        public ModType Mod { get; } = ModType.Any;
+    }
+}

Alpm/EnumerableWrapper`3.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    internal struct EnumerableWrapper<TImpl, TElement, THandle> : IEnumerable<TElement> where TImpl : struct,
+        IItemsReader<TElement, THandle>
+        where THandle : SafeHandle
+    {
+        private TImpl _impl;
+
+        public EnumerableWrapper(TImpl impl)
+        {
+            _impl = impl;
+        }
+
+        public IEnumerator<TElement> GetEnumerator()
+        {
+            var handle = _impl.Handle;
+            var release = false;
+
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try
+            {
+                handle.DangerousAddRef(ref release);
+                if (!release) throw new ObjectDisposedException(_impl.GetType().FullName);
+                for (var list = _impl.GetItems(); list != IntPtr.Zero; list = Wrapper.ListNext(list))
+                {
+                    yield return _impl.PtrToItem(Wrapper.ListData(list));
+                }
+            }
+            finally
+            {
+                if (release)
+                    handle.DangerousRelease();
+            }
+        }
+
+        IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+    }
+}

Alpm/ErrNo.cs

@@ -0,0 +1,81 @@
+namespace Foodsoft.Alpm
+{
+    public enum ErrNo
+    {
+        ERR_OK = 0,
+        ERR_MEMORY,
+        ERR_SYSTEM,
+        ERR_BADPERMS,
+        ERR_NOT_A_FILE,
+        ERR_NOT_A_DIR,
+        ERR_WRONG_ARGS,
+        ERR_DISK_SPACE,
+
+        /* Interface */
+        ERR_HANDLE_NULL,
+        ERR_HANDLE_NOT_NULL,
+        ERR_HANDLE_LOCK,
+
+        /* Databases */
+        ERR_DB_OPEN,
+        ERR_DB_CREATE,
+        ERR_DB_NULL,
+        ERR_DB_NOT_NULL,
+        ERR_DB_NOT_FOUND,
+        ERR_DB_INVALID,
+        ERR_DB_INVALID_SIG,
+        ERR_DB_VERSION,
+        ERR_DB_WRITE,
+        ERR_DB_REMOVE,
+
+        /* Servers */
+        ERR_SERVER_BAD_URL,
+        ERR_SERVER_NONE,
+
+        /* Transactions */
+        ERR_TRANS_NOT_NULL,
+        ERR_TRANS_NULL,
+        ERR_TRANS_DUP_TARGET,
+        ERR_TRANS_NOT_INITIALIZED,
+        ERR_TRANS_NOT_PREPARED,
+        ERR_TRANS_ABORT,
+        ERR_TRANS_TYPE,
+        ERR_TRANS_NOT_LOCKED,
+        ERR_TRANS_HOOK_FAILED,
+
+        /* Packages */
+        ERR_PKG_NOT_FOUND,
+        ERR_PKG_IGNORED,
+        ERR_PKG_INVALID,
+        ERR_PKG_INVALID_CHECKSUM,
+        ERR_PKG_INVALID_SIG,
+        ERR_PKG_MISSING_SIG,
+        ERR_PKG_OPEN,
+        ERR_PKG_CANT_REMOVE,
+        ERR_PKG_INVALID_NAME,
+        ERR_PKG_INVALID_ARCH,
+        ERR_PKG_REPO_NOT_FOUND,
+
+        /* Signatures */
+        ERR_SIG_MISSING,
+        ERR_SIG_INVALID,
+
+        /* Dependencies */
+        ERR_UNSATISFIED_DEPS,
+        ERR_CONFLICTING_DEPS,
+        ERR_FILE_CONFLICTS,
+
+        /* Misc */
+        ERR_RETRIEVE,
+        ERR_INVALID_REGEX,
+
+        /* External library errors */
+        ERR_LIBARCHIVE,
+        ERR_LIBCURL,
+        ERR_EXTERNAL_DOWNLOAD,
+        ERR_GPGME,
+
+        /* Missing compile-time features */
+        ERR_MISSING_CAPABILITY_SIGNATURES
+    }
+}

Alpm/Exception.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Runtime.Serialization;
+using Foodsoft.Alpm;
+
+namespace Foodsoft.Alpm
+{
+    [Serializable()]
+    public class Exception : System.Exception
+    {
+        public Exception() { }
+        internal Exception(SafeAlpmHandle handle) : base(alpm.alpm_strerror(alpm.alpm_errno(handle))) { }
+        public Exception(ErrNo errno) : base(alpm.alpm_strerror(errno)) { }
+        public Exception(ErrNo errno, System.Exception inner) : base(alpm.alpm_strerror(errno), inner) { }
+
+        protected Exception(SerializationInfo info,
+            StreamingContext context) : base(info, context) { }
+    }
+}

Alpm/File.cs

@@ -0,0 +1,15 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    [SuppressMessage("ReSharper", "UnassignedGetOnlyAutoProperty")]
+    public readonly struct File
+    {
+        [field: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public string Name { get; }
+
+        public long Size { get; }
+        public uint Mode { get; }
+    }
+}

Alpm/FileList.cs

@@ -0,0 +1,23 @@
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Foodsoft.Alpm
+{
+    public class FileList : IReadOnlyList<File>
+    {
+        
+        public IEnumerator<File> GetEnumerator()
+        {
+            throw new System.NotImplementedException();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        public int Count { get; }
+
+        public File this[int index] => throw new System.NotImplementedException();
+    }
+}

Alpm/Handle.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    public sealed class Handle : IDisposable
+    {
+        private readonly SafeAlpmHandle _handle;
+
+        public Handle(string root, string dbpath)
+        {
+            _handle = alpm.alpm_initialize(root, dbpath, out var err);
+            if (_handle.IsInvalid)
+            {
+                throw new Exception(err);
+            }
+        }
+
+        public void Dispose()
+        {
+            _handle.Dispose();
+        }
+
+        private Database ToDatabase(IntPtr ptr)
+        {
+            // It's ok that the database pointer is kept outside atomic section, because the resource is actually
+            // managed by the alpm handle.
+            if (ptr == IntPtr.Zero)
+            {
+                throw new Exception(_handle);
+            }
+
+            return new Database(new SafeDatabaseHandle(ptr, _handle));
+        }
+
+        public Database LocalDB => ToDatabase(alpm.alpm_get_localdb(_handle));
+
+        public Database RegisterSyncDB(string treename, SigLevel sigLevel) =>
+            ToDatabase(alpm.alpm_register_syncdb(_handle, treename, sigLevel));
+
+        private readonly struct CacheDirsAccessor : IItemsAccessor<string>
+        {
+            internal CacheDirsAccessor(SafeAlpmHandle safeAlpmHandle)
+            {
+                SafeAlpmHandle = safeAlpmHandle;
+            }
+
+            public SafeAlpmHandle SafeAlpmHandle { get; }
+            public IntPtr GetItems() => alpm.alpm_option_get_cachedirs(SafeAlpmHandle);
+            public int SetItems(IntPtr list) => alpm.alpm_option_set_cachedirs(SafeAlpmHandle, list);
+            public int AddItem(string item) => alpm.alpm_option_add_cachedir(SafeAlpmHandle, item);
+            public int RemoveItem(string item) => alpm.alpm_option_remove_cachedir(SafeAlpmHandle, item);
+            public IntPtr FindItem(string item) => alpm.alpm_list_find_str(GetItems(), item);
+            public string PtrToItem(IntPtr p) => Marshal.PtrToStringUTF8(p)!;
+        }
+
+        public ICollection<string> CacheDirs
+        {
+            get => new CollectionWrapper<CacheDirsAccessor, string>(new CacheDirsAccessor(_handle));
+            set
+            {
+                foreach (var s in value)
+                {
+                    API.WrapError(_handle, () => alpm.alpm_option_add_cachedir(_handle, s));
+                }
+            }
+        }
+
+        public bool ShouldIgnorePackage(Package pkg)
+        {
+            return alpm.alpm_pkg_should_ignore(_handle, pkg.Handle) == 0;
+        }
+    }
+}

Alpm/IAlpmItemsAccessor`1.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace Foodsoft.Alpm
+{
+    internal interface IItemsAccessor<TElement>
+    {
+        SafeAlpmHandle SafeAlpmHandle { get; }
+        public IntPtr GetItems();
+        public int SetItems(IntPtr list);
+        public int AddItem(TElement item);
+        public int RemoveItem(TElement item);
+        public IntPtr FindItem(TElement item);
+        public TElement PtrToItem(IntPtr p);
+    }
+}

Alpm/IItemsReader`2.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    internal interface IItemsReader<out TElement, out THandle> where THandle : SafeHandle
+    {
+        public THandle Handle { get; }
+        public IntPtr GetItems();
+        public TElement PtrToItem(IntPtr p);
+    }
+}

Alpm/IPackageData.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Collections.Generic;
+
+namespace Foodsoft.Alpm
+{
+    public enum PackageOrigin
+    {
+        File = 1,
+        LocalDB,
+        SyncDB
+    }
+
+    public enum InstallReason
+    {
+        Explicit = 0,
+        Depend = 1
+    }
+
+    [Flags]
+    public enum ValidationType
+    {
+        Unknown = 0,
+        None = (1 << 0),
+        MD5Sum = (1 << 1),
+        SHA256Sum = (1 << 2),
+        Signature = (1 << 3)
+    }
+
+    public interface IPackageData : IDisposable
+    {
+        public string Filename { get; }
+        public string Base { get; }
+        public string Name { get; }
+        public string Version { get; }
+        public PackageOrigin Origin { get; }
+        public string Description { get; }
+        public string Url { get; }
+        public DateTimeOffset BuildDate { get; }
+        public DateTimeOffset InstallDate { get; }
+        public string Packager { get; }
+        public string MD5Sum { get; }
+        public string SHA256Sum { get; }
+        public string Arch { get; }
+        public long Size { get; }
+        public long InstalledSize { get; }
+        public InstallReason InstallReason { get; }
+        public IEnumerable<string> Licenses { get; }
+        public IReadOnlyCollection<string> Groups { get; }
+        public IReadOnlyCollection<Depend> Depends { get; }
+        public IReadOnlyCollection<Depend> OptDepends { get; }
+        public IReadOnlyCollection<Depend> CheckDepends { get; }
+        public IReadOnlyCollection<Depend> MakeDepends { get; }
+        public IReadOnlyCollection<Depend> Conflicts { get; }
+        public IReadOnlyCollection<Depend> Provides { get; }
+        public IReadOnlyCollection<Depend> Replaces { get; }
+        public IReadOnlyList<File> FileList { get; }
+        public IReadOnlyList<Backup> Backup { get; }
+        public string Base64Signature { get; }
+        public ValidationType Validation { get; }
+        public bool HasScriptlet { get; }
+        public long DownloadSize { get; }
+        public Database? DB { get;  }
+    }
+}

Alpm/Junk.cs

@@ -0,0 +1,345 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{    
+    
+    /*
+ * Hooks
+ */
+
+    enum alpm_hook_when_t
+    {
+        HOOK_PRE_TRANSACTION = 1,
+        HOOK_POST_TRANSACTION
+    }
+
+/*
+ * Logging facilities
+ */
+
+    /** Logging Levels */
+    enum _alpm_loglevel_t
+    {
+        LOG_ERROR = 1,
+        LOG_WARNING = (1 << 1),
+        LOG_DEBUG = (1 << 2),
+        LOG_FUNCTION = (1 << 3)
+    }
+
+
+    /** Location a package object was loaded from. */
+    enum alpm_pkgfrom_t
+    {
+        PKG_FROM_FILE = 1,
+        PKG_FROM_LOCALDB,
+        PKG_FROM_SYNCDB
+    }
+
+    /** Method used to validate a package. */
+    enum alpm_pkgvalidation_t
+    {
+        PKG_VALIDATION_UNKNOWN = 0,
+        PKG_VALIDATION_NONE = (1 << 0),
+        PKG_VALIDATION_MD5SUM = (1 << 1),
+        PKG_VALIDATION_SHA256SUM = (1 << 2),
+        PKG_VALIDATION_SIGNATURE = (1 << 3)
+    }
+
+    /** Types of version constraints in dependency specs. */
+    public enum alpm_depmod_t
+    {
+        /** No version constraint */
+        DEP_MOD_ANY = 1,
+
+        /** Test version equality (package=x.y.z) */
+        DEP_MOD_EQ,
+
+        /** Test for at least a version (package>=x.y.z) */
+        DEP_MOD_GE,
+
+        /** Test for at most a version (package<=x.y.z) */
+        DEP_MOD_LE,
+
+        /** Test for greater than some version (package>x.y.z) */
+        DEP_MOD_GT,
+
+        /** Test for less than some version (package<x.y.z) */
+        DEP_MOD_LT
+    }
+
+    /**
+     * File conflict type.
+     * Whether the conflict results from a file existing on the filesystem, or with
+     * another target in the transaction.
+     */
+    enum alpm_fileconflicttype_t
+    {
+        FILECONFLICT_TARGET = 1,
+        FILECONFLICT_FILESYSTEM
+    }
+
+    /** PGP signature verification options */
+    [Flags]
+    public enum SigLevel
+    {
+        SIG_PACKAGE = (1 << 0),
+        SIG_PACKAGE_OPTIONAL = (1 << 1),
+        SIG_PACKAGE_MARGINAL_OK = (1 << 2),
+        SIG_PACKAGE_UNKNOWN_OK = (1 << 3),
+
+        SIG_DATABASE = (1 << 10),
+        SIG_DATABASE_OPTIONAL = (1 << 11),
+        SIG_DATABASE_MARGINAL_OK = (1 << 12),
+        SIG_DATABASE_UNKNOWN_OK = (1 << 13),
+        SIG_USE_DEFAULT = (1 << 31)
+    }
+
+    /** PGP signature verification status return codes */
+    enum alpm_sigstatus_t
+    {
+        SIGSTATUS_VALID,
+        SIGSTATUS_KEY_EXPIRED,
+        SIGSTATUS_SIG_EXPIRED,
+        SIGSTATUS_KEY_UNKNOWN,
+        SIGSTATUS_KEY_DISABLED,
+        SIGSTATUS_INVALID
+    }
+
+    /** PGP signature verification status return codes */
+    enum alpm_sigvalidity_t
+    {
+        SIGVALIDITY_FULL,
+        SIGVALIDITY_MARGINAL,
+        SIGVALIDITY_NEVER,
+        SIGVALIDITY_UNKNOWN
+    }
+
+    /** Dependency */
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
+    public struct alpm_depend_t
+    {
+        string name;
+        string version;
+        string desc;
+        public ulong name_hash;
+        public alpm_depmod_t mod;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    public struct AlpmDependPtr
+    {
+        private IntPtr ptr;
+
+        public alpm_depend_t Unmarshal()
+        {
+            return Marshal.PtrToStructure<alpm_depend_t>(ptr);
+        }
+    }
+
+    /** Missing dependency */
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
+    public struct alpm_depmissing_t
+    {
+        public string target;
+
+        public AlpmDependPtr depend;
+
+        /* this is used only in the case of a remove dependency error */
+        public string causingpkg;
+    }
+
+    [StructLayout(LayoutKind.Sequential)]
+    /** Conflict */
+    public struct alpm_conflict_t
+    {
+        public ulong package1_hash;
+        public ulong package2_hash;
+        public string package1;
+        public string package2;
+        public AlpmDependPtr reason;
+    }
+
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
+    /** File conflict */
+    struct alpm_fileconflict_t
+    {
+        public string target;
+        public alpm_fileconflicttype_t type;
+        public string file;
+        public string ctarget;
+    }
+
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
+    /** Package group */
+    public readonly struct alpm_group_t
+    {
+        /** group name */
+        public readonly string name;
+
+        /** list of alpm_pkg_t packages */
+        private readonly unsafe alpm_list_t* packages;
+    }
+
+    /* TODO: alpm_pkg_get_files - need to wrap */
+    /** File in a package */
+    public readonly struct alpm_file_t
+    {
+        public readonly string name;
+        public readonly UIntPtr size;
+        public readonly uint mode;
+    }
+
+    public enum caps
+    {
+        ALPM_CAPABILITY_NLS = (1 << 0),
+        ALPM_CAPABILITY_DOWNLOADER = (1 << 1),
+        ALPM_CAPABILITY_SIGNATURES = (1 << 2)
+    }
+
+    /** Package filelist container */
+    public struct _alpm_filelist_t
+    {
+        public UIntPtr count;
+        private IntPtr files;
+
+        /* FIXME: This is broken as shit */
+        public alpm_file_t[] Unmarshal()
+        {
+            var iCount = (int) this.count;
+            var byteCount = Marshal.SizeOf<alpm_file_t>() * iCount;
+            var byteBuffer = new byte[byteCount];
+            Marshal.Copy(files, byteBuffer, 0, byteBuffer.Length);
+            var result = new alpm_file_t[iCount];
+
+            Buffer.BlockCopy(byteBuffer, 0, result, 0, byteBuffer.Length);
+            return result;
+        }
+    }
+
+    /** Local package or package file backup entry */
+    public struct _alpm_backup_t
+    {
+        string name;
+        string hash;
+    }
+
+    public class alpm_pgpkey_t
+    {
+        public byte[] data;
+        public string fingerprint;
+        public string uid;
+        public string name;
+        public string email;
+        public long created;
+        public long expires;
+        public uint revoked;
+        public char pubkey_algo;
+    }
+
+    public class PgpKeyInMarshaler : ICustomMarshaler
+    {
+        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
+        private class NativePgpKey
+        {
+            public IntPtr data;
+            public string fingerprint;
+            public string uid;
+            public string name;
+            public string email;
+            public long created;
+            public long expires;
+            public uint length;
+            public uint revoked;
+            public char pubkey_algo;
+        }
+
+        public void CleanUpManagedData(object ManagedObj) { }
+        public void CleanUpNativeData(IntPtr pNativeData) { }
+
+        public int GetNativeDataSize()
+        {
+            throw new NotImplementedException();
+        }
+
+        public IntPtr MarshalManagedToNative(object ManagedObj)
+        {
+            throw new NotImplementedException();
+        }
+
+        public object MarshalNativeToManaged(IntPtr pNativeData)
+        {
+            var raw = Marshal.PtrToStructure<NativePgpKey>(pNativeData);
+            var managed = new alpm_pgpkey_t()
+            {
+                data = new byte[raw.length],
+                fingerprint = raw.fingerprint,
+                uid = raw.uid,
+                name = raw.name,
+                email = raw.email,
+                created = raw.created,
+                expires = raw.expires,
+                revoked = raw.revoked,
+                pubkey_algo = raw.pubkey_algo
+            };
+            Marshal.Copy(raw.data, managed.data, 0, (int) raw.length);
+            return managed;
+        }
+    }
+
+    /**
+ * Signature result. Contains the key, status, and validity of a given
+ * signature.
+ */
+    public readonly struct alpm_sigresult_t
+    {
+        [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(PgpKeyInMarshaler))]
+        readonly alpm_pgpkey_t key;
+
+        readonly alpm_sigstatus_t status;
+        readonly alpm_sigvalidity_t validity;
+    }
+
+    /**
+ * Signature list. Contains the number of signatures found and a pointer to an
+ * array of results. The array is of size count.
+ */
+    public class SigListInMarshaler : ICustomMarshaler
+    {
+        public void CleanUpManagedData(object ManagedObj) { }
+        public void CleanUpNativeData(IntPtr pNativeData) { }
+
+        public int GetNativeDataSize()
+        {
+            throw new NotImplementedException();
+        }
+
+        public IntPtr MarshalManagedToNative(object ManagedObj)
+        {
+            throw new NotImplementedException();
+        }
+
+        public object MarshalNativeToManaged(IntPtr pNativeData)
+        {
+            UIntPtr count;
+            IntPtr data;
+            unsafe
+            {
+                count = *(UIntPtr*) pNativeData;
+                data = *(IntPtr*) (pNativeData + sizeof(UIntPtr));
+            }
+
+            var iCount = (int) count;
+            var result = new alpm_sigresult_t[iCount];
+            // NOTE: I expect this to fail cuz i didn't implement the above GetNativeDataSize
+            for (var i = 0; i < iCount; ++i, data += Marshal.SizeOf<alpm_sigresult_t>())
+            {
+                result[i] = Marshal.PtrToStructure<alpm_sigresult_t>(data);
+            }
+
+            return result;
+        }
+    }
+
+    
+}

Alpm/Package.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    public abstract class Package : IPackageData
+    {
+        internal SafePackageHandle Handle { get; }
+
+        internal Package(SafePackageHandle handle)
+        {
+            Handle = handle;
+        }
+
+        public string Filename => alpm.alpm_pkg_get_filename(Handle);
+        public string Base => alpm.alpm_pkg_get_base(Handle);
+        public string Name => alpm.alpm_pkg_get_name(Handle);
+        public string Version => alpm.alpm_pkg_get_version(Handle);
+        public PackageOrigin Origin => alpm.alpm_pkg_get_origin(Handle);
+        public string Description => alpm.alpm_pkg_get_desc(Handle);
+        public string Url => alpm.alpm_pkg_get_url(Handle);
+
+        public DateTimeOffset BuildDate => DateTimeOffset.FromUnixTimeSeconds(alpm.alpm_pkg_get_builddate(Handle));
+        public DateTimeOffset InstallDate => DateTimeOffset.FromUnixTimeSeconds(alpm.alpm_pkg_get_installdate(Handle));
+        public string Packager => alpm.alpm_pkg_get_packager(Handle);
+        public string MD5Sum => alpm.alpm_pkg_get_md5sum(Handle);
+        public string SHA256Sum => alpm.alpm_pkg_get_sha256sum(Handle);
+        public string Arch => alpm.alpm_pkg_get_arch(Handle);
+        public long Size => alpm.alpm_pkg_get_size(Handle);
+        public long InstalledSize => alpm.alpm_pkg_get_isize(Handle);
+        public InstallReason InstallReason => alpm.alpm_pkg_get_reason(Handle);
+
+        public IEnumerable<string> Licenses { get; }
+        public IReadOnlyCollection<string> Groups { get; }
+        public IReadOnlyCollection<Depend> Depends { get; }
+        public IReadOnlyCollection<Depend> OptDepends { get; }
+        public IReadOnlyCollection<Depend> CheckDepends { get; }
+        public IReadOnlyCollection<Depend> MakeDepends { get; }
+        public IReadOnlyCollection<Depend> Conflicts { get; }
+        public IReadOnlyCollection<Depend> Provides { get; }
+        public IReadOnlyCollection<Depend> Replaces { get; }
+        public IReadOnlyList<File> FileList { get; }
+        public IReadOnlyList<Backup> Backup { get; }
+        public string Base64Signature { get; }
+        public ValidationType Validation { get; }
+        public bool HasScriptlet { get; }
+        public long DownloadSize { get; }
+        public bool CheckMD5Sum()
+        {
+            throw new NotImplementedException();
+        }
+
+        public virtual Database? DB => null;
+
+        public  IEnumerator<Package> ComputeRequiredBy()
+        {
+            throw new NotImplementedException();
+        }
+
+        public  IEnumerator<Package> ComputeOptionalFor()
+        {
+            throw new NotImplementedException();
+        }
+
+
+        public void Dispose()
+        {
+            Handle.Dispose();
+        }
+    }
+    
+}

Alpm/PackageList.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Runtime.CompilerServices;
+
+namespace Foodsoft.Alpm
+{
+    public struct PackageList : IEnumerable<Package>, IDisposable
+    {
+        private SafeListHandle<SafeDatabaseHandle> _handle;
+        private Database _db;
+
+        internal PackageList(SafeListHandle<SafeDatabaseHandle> handle, Database db)
+        {
+            _handle = handle;
+            _db = db;
+        }
+
+        public IEnumerator<Package> GetEnumerator()
+        {
+            var release = false;
+
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try
+            {
+                _handle.DangerousAddRef(ref release);
+                if (!release) throw new ObjectDisposedException(_handle.GetType().FullName);
+                for (var list = _handle.DangerousGetHandle(); list != IntPtr.Zero; list = Wrapper.ListNext(list))
+                {
+                    yield return new CachePackage(
+                        new SafeCachePackageHandle(Wrapper.ListData(list), _handle.ParentHandle), _db);
+                }
+            }
+            finally
+            {
+                if (release)
+                    _handle.DangerousRelease();
+            }
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
+
+        public void Dispose()
+        {
+            _handle.Dispose();
+        }
+    }
+}

Alpm/SafeAlpmHandle.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Runtime.ConstrainedExecution;
+using System.Runtime.InteropServices;
+using Foodsoft.Alpm;
+
+namespace Foodsoft.Alpm
+{
+    internal sealed class SafeAlpmHandle : SafeHandle
+    {
+        private SafeAlpmHandle() : base(IntPtr.Zero, true) { }
+
+        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail), PrePrepareMethod]
+        protected override bool ReleaseHandle() => alpm.alpm_release(handle) == 0;
+
+        public override bool IsInvalid
+        {
+            [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), PrePrepareMethod]
+            get => handle == IntPtr.Zero;
+        }
+    }
+}

Alpm/SafeCachePackageHandle.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.ConstrainedExecution;
+
+namespace Foodsoft.Alpm
+{
+    internal sealed class SafeCachePackageHandle : SafePackageHandle
+    {
+        internal SafeAlpmHandle SafeAlpmHandle => SafeDatabaseHandle.SafeAlpmHandle;
+        internal SafeDatabaseHandle SafeDatabaseHandle { get; } = null!;
+
+        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
+        [PrePrepareMethod]
+        internal SafeCachePackageHandle(IntPtr ptr, SafeDatabaseHandle dbHandle)
+            : base()
+        {
+            var success = false;
+
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try { }
+            finally
+            {
+                dbHandle.DangerousAddRef(ref success);
+                if (success)
+                {
+                    SafeDatabaseHandle = dbHandle;
+                    handle = ptr;
+                }
+            }
+
+            if (!success) throw new ObjectDisposedException(GetType().FullName);
+        }
+
+        protected override bool ReleaseHandle()
+        {
+            SafeDatabaseHandle.DangerousRelease();
+            return true;
+        }
+
+        public override bool IsInvalid
+        {
+            [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), PrePrepareMethod]
+            get => handle == IntPtr.Zero;
+        }
+    }
+}

Alpm/SafeDatabaseHandle.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.ConstrainedExecution;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    internal sealed class SafeDatabaseHandle : SafeHandle
+    {
+        internal SafeAlpmHandle SafeAlpmHandle
+        {
+            [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
+            [PrePrepareMethod]
+            get;
+        } = null!; // we always throw in the constructor on failure
+
+        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
+        [PrePrepareMethod]
+        internal SafeDatabaseHandle(IntPtr dbPtr, SafeAlpmHandle safeAlpmHandle)
+            : base(IntPtr.Zero, true)
+        {
+            var success = false;
+
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try { }
+            finally
+            {
+                safeAlpmHandle.DangerousAddRef(ref success);
+                if (success)
+                {
+                    SafeAlpmHandle = safeAlpmHandle;
+                    handle = dbPtr;
+                }
+            }
+
+            if (!success) throw new ObjectDisposedException(GetType().FullName);
+        }
+
+        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail), PrePrepareMethod]
+        protected override bool ReleaseHandle()
+        {
+            SafeAlpmHandle.DangerousRelease();
+            return true;
+        }
+
+        public override bool IsInvalid
+        {
+            [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), PrePrepareMethod]
+            get => handle == IntPtr.Zero;
+        }
+    }
+}

Alpm/SafeListHandle`1.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.ConstrainedExecution;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    internal sealed class SafeListHandle<TParent> : SafeHandle where TParent: SafeHandle
+    {
+        internal TParent ParentHandle
+        {
+            [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
+            [PrePrepareMethod]
+            get;
+        } = null!;
+
+        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail)]
+        [PrePrepareMethod]
+        internal SafeListHandle(IntPtr listPtr, TParent parentHandle)
+            : base(IntPtr.Zero, true)
+        {
+            var success = false;
+            RuntimeHelpers.PrepareConstrainedRegions();
+            try { }
+            finally
+            {
+                parentHandle.DangerousAddRef(ref success);
+                if (success)
+                {
+                    ParentHandle = parentHandle;
+                    handle = listPtr;
+                }
+
+            }
+            if (!success)
+                throw new ObjectDisposedException(GetType().FullName);
+        }
+
+        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), PrePrepareMethod]
+        protected override bool ReleaseHandle()
+        {
+            ParentHandle.DangerousRelease();
+            return true;
+        }
+
+        public override bool IsInvalid
+        {
+            [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), PrePrepareMethod]
+            get => ParentHandle.IsInvalid;
+        }
+    }
+}

Alpm/SafePackageHandle.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Runtime.ConstrainedExecution;
+using System.Runtime.InteropServices;
+
+namespace Foodsoft.Alpm
+{
+    internal class SafePackageHandle : SafeHandle
+    {
+        protected SafePackageHandle() : base(IntPtr.Zero, true) { }
+
+        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail), PrePrepareMethod]
+        protected override bool ReleaseHandle() => alpm.alpm_pkg_free(handle) == 0;
+
+        public override bool IsInvalid
+        {
+            [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), PrePrepareMethod]
+            get => handle == IntPtr.Zero;
+        }
+    }
+}

Alpm/UTF8InMarshaler.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace Foodsoft.Alpm
+{
+    internal readonly struct UTF8InMarshaler : ICustomMarshaler
+    {
+        private static readonly UTF8InMarshaler _instance = default;
+
+        public void CleanUpManagedData(object managedObj) { }
+
+        public void CleanUpNativeData(IntPtr pNativeData)
+        {
+            if (pNativeData == IntPtr.Zero)
+                return;
+            Marshal.FreeHGlobal(pNativeData);
+        }
+
+        public int GetNativeDataSize() => -1;
+
+        public unsafe IntPtr MarshalManagedToNative(object? managedObj)
+        {
+            if (managedObj is null) return IntPtr.Zero;
+
+            var s = (string) managedObj;
+
+            var nb = Encoding.UTF8.GetMaxByteCount(s.Length);
+
+            var pMem = Marshal.AllocHGlobal(nb + 1);
+            var pbMem = (byte*) pMem;
+
+            int nbWritten;
+            fixed (char* firstChar = s)
+            {
+                nbWritten = Encoding.UTF8.GetBytes(firstChar, s.Length, pbMem, nb);
+            }
+
+            pbMem[nbWritten] = 0;
+            return pMem;
+        }
+
+        public object MarshalNativeToManaged(IntPtr pNativeData)
+        {
+            return Marshal.PtrToStringUTF8(pNativeData)!;
+        }
+
+        // ReSharper disable once UnusedMember.Local
+        // ReSharper disable once UnusedParameter.Local
+        private static ICustomMarshaler GetInstance(string cookie)
+        {
+            return _instance;
+        }
+    }
+}

Alpm/UTF8OutMarshaler.cs

@@ -0,0 +1,35 @@
+namespace Foodsoft.Alpm
+{
+    using System;
+    using System.Runtime.InteropServices;
+    using System.Text;
+
+
+    internal readonly struct UTF8OutMarshaler : ICustomMarshaler
+    {
+        private static readonly UTF8OutMarshaler _instance = default;
+
+        // ReSharper disable once UnusedMember.Local
+        // ReSharper disable once UnusedParameter.Local
+        private static ICustomMarshaler GetInstance(string cookie)
+        {
+            return _instance;
+        }
+
+        public void CleanUpManagedData(object managedObj) { }
+
+        public void CleanUpNativeData(IntPtr pNativeData) { }
+
+        public int GetNativeDataSize() => -1;
+
+        public object MarshalNativeToManaged(IntPtr pNativeData)
+        {
+            return Marshal.PtrToStringUTF8(pNativeData)!;
+        }
+
+        public IntPtr MarshalManagedToNative(object managedObj)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}

Alpm/Wrapper.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace Foodsoft.Alpm
+{
+    internal static class Wrapper
+    {
+        internal static unsafe IntPtr ListNext(IntPtr list) => ((alpm_list_t*) list)->next;
+        internal static unsafe IntPtr ListData(IntPtr list) => ((alpm_list_t*) list)->data;
+    }
+}

Alpm/alpm.cs

@@ -0,0 +1,225 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Foodsoft.Alpm;
+
+namespace Foodsoft.Alpm
+{
+    // ReSharper disable once InconsistentNaming
+    [StructLayout(LayoutKind.Sequential)]
+    internal struct alpm_list_t
+    {
+        internal IntPtr data;
+        internal readonly IntPtr prev;
+        internal readonly IntPtr next;
+    }
+
+    // ReSharper disable once InconsistentNaming
+    internal static class alpm
+    {
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_pkg_should_ignore(SafeAlpmHandle handle, SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_filename(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_base(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_name(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_version(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        public static extern PackageOrigin alpm_pkg_get_origin(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_desc(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_url(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        public static extern long alpm_pkg_get_builddate(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        public static extern long alpm_pkg_get_installdate(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_packager(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_md5sum(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_sha256sum(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_arch(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        public static extern long alpm_pkg_get_size(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        public static extern long alpm_pkg_get_isize(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        public static extern InstallReason alpm_pkg_get_reason(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_licenses(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_groups(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_depends(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_optdepends(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_checkdepends(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_makedepends(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_conflicts(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_pkg_get_provides(SafePackageHandle pkg);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_pkg_set_reason(SafePackageHandle pkg, InstallReason reason);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_pkg_free(IntPtr ptr);
+        
+        
+        [DllImport(nameof(alpm))]
+        public static extern IntPtr alpm_option_get_cachedirs(SafeAlpmHandle handle);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_option_set_cachedirs(SafeAlpmHandle handle, IntPtr cachedirs);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_option_add_cachedir(SafeAlpmHandle handle, 
+            [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8InMarshaler))] string cachedir);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_option_remove_cachedir(SafeAlpmHandle handle, 
+            [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8InMarshaler))] string cachedir);
+
+        [DllImport(nameof(alpm))]
+        public static extern ErrNo alpm_errno(SafeAlpmHandle handle);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_strerror(ErrNo err);
+
+        [DllImport(nameof(alpm))]
+        public static extern IntPtr alpm_get_localdb(SafeAlpmHandle handle);
+
+        [DllImport(nameof(alpm))]
+        public static extern unsafe alpm_list_t* alpm_option_get_syncdbs();
+
+        [DllImport(nameof(alpm))]
+        public static extern IntPtr alpm_register_syncdb(SafeAlpmHandle handle, [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8InMarshaler))] string treename, SigLevel sigLevel);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_db_unregister_all_syncdbs(SafeAlpmHandle handle);
+
+        [DllImport(nameof(alpm))]
+        public static extern unsafe alpm_list_t* alpm_list_next(alpm_list_t* list);
+
+        [DllImport(nameof(alpm))]
+        public static extern UIntPtr alpm_list_count(IntPtr list);
+
+        [DllImport(nameof(alpm))]
+        public static extern void alpm_list_free(IntPtr list);
+
+        [DllImport(nameof(alpm))]
+        public static extern IntPtr alpm_list_find_str(IntPtr list, [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8InMarshaler))] string needle);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_unlock(Handle handle);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_version();
+
+        [DllImport(nameof(alpm))]
+        public static extern caps alpm_capabilities();
+
+        [DllImport(nameof(alpm))]
+        public static extern SafeAlpmHandle alpm_initialize(
+            [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8InMarshaler))]
+            string root, [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8InMarshaler))]
+            string dbpath, out ErrNo err);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_release(IntPtr handle);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_db_remove_server(SafeDatabaseHandle db,
+            [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8InMarshaler))]
+            string url);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_db_unregister(SafeDatabaseHandle db);
+
+        [DllImport(nameof(alpm))]
+        [return: MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8OutMarshaler))]
+        public static extern string alpm_db_get_name(SafeDatabaseHandle db);
+
+        [DllImport(nameof(alpm))]
+        public static extern SigLevel alpm_db_get_siglevel(SafeDatabaseHandle db);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_db_get_valid(SafeDatabaseHandle db);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_db_update(int force, SafeDatabaseHandle db);
+
+        [DllImport(nameof(alpm))]
+        public static extern IntPtr alpm_db_get_servers(SafeDatabaseHandle db);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_db_set_servers(SafeDatabaseHandle db, IntPtr list);
+
+        [DllImport(nameof(alpm))]
+        public static extern int alpm_db_add_server(SafeDatabaseHandle db,
+            [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8InMarshaler))]
+            string url);
+
+        [DllImport(nameof(alpm))]
+        public static extern IntPtr alpm_pkg_get_pkg(SafeDatabaseHandle db,
+            [MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef = typeof(UTF8InMarshaler))]
+            string name);
+
+        [DllImport(nameof(alpm))]
+        public static extern IntPtr alpm_db_get_pkgcache(SafeDatabaseHandle db);
+
+    }
+}