Enable ILASM for *nix

This enables ILASM for x-platforms.
1. Added a bunch of warning disable options mostly due to this prebuilt asmparse.cpp
2. Create a separte entry point "main" to pass WCHAR arguments.
3. PDB (CorSymWriter) part is disabled.
4. Converting/embedding resource file to binary is disabled.
5. jkotas kindly provided a code for IsTextUnicode which is unavailable on CoreCLR.

2 files changed, 29 insertions, 0 deletions

diff --git a/src/palrt/CMakeLists.txt b/src/palrt/CMakeLists.txt
index a66f148082..bc965db15a 100644
--- a/src/palrt/CMakeLists.txt
+++ b/src/palrt/CMakeLists.txt
@@ -11,6 +11,7 @@ set(PALRT_SOURCES
     memorystream.cpp
     path.cpp
     urlpars.cpp
+    unicode.cpp
     variant.cpp
 )
 
diff --git a/src/palrt/unicode.cpp b/src/palrt/unicode.cpp
new file mode 100644
index 0000000000..2ea581586c
--- /dev/null
+++ b/src/palrt/unicode.cpp
@@ -0,0 +1,28 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+//
+
+#include "common.h" 
+
+// This is a simplified implementation of IsTextUnicode.
+// https://github.com/dotnet/coreclr/issues/2307
+BOOL IsTextUnicode(CONST VOID* lpv, int iSize, LPINT lpiResult)
+{
+    *lpiResult = 0;
+
+    if (iSize < 2) return FALSE;
+
+    BYTE * p = (BYTE *)lpv;
+
+    // Check for Unicode BOM
+    if ((*p == 0xFF) && (*(p+1) == 0xFE))
+    {
+        *lpiResult |= IS_TEXT_UNICODE_SIGNATURE;
+        return TRUE;
+    }
+
+    return FALSE;
+}
+