From cb9d679a3a93c65c44904bf77811b9d74e431e23 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Fri, 26 Oct 2018 08:16:54 -0400
Subject: Feature/file system cache (#692)

* First pass at caching file system.

* default-file-system -> slang-file-system
fix problem with location("build.linux") confusing windows build for now.

* Added CompressedResult
Fix problem in Result construction with it being unsigned

* Add support for Path simplification.

* Testing for Path::Simplify.

* Refactored CacheFileSystem - automatically handles ISlangFileSystem or ISlangFileSystemExt appropriately.
Removed WrapFileSystem - because wasn't possible to emulate some of the behavior if just loadFile is implemented.
Split out StringBlob - so that no need to convert between ISlangBlob and String repeatidly.

* Remove unwanted code in ~CompileRequest
---
 source/core/slang-string-util.cpp | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

(limited to 'source/core/slang-string-util.cpp')

diff --git a/source/core/slang-string-util.cpp b/source/core/slang-string-util.cpp
index 29f8dc0ca..6d0d896a1 100644
--- a/source/core/slang-string-util.cpp
+++ b/source/core/slang-string-util.cpp
@@ -2,6 +2,19 @@
 
 namespace Slang {
 
+// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! StringBlob !!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+// Allocate static const storage for the various interface IDs that the Slang API needs to expose
+static const Guid IID_ISlangUnknown = SLANG_UUID_ISlangUnknown;
+static const Guid IID_ISlangBlob = SLANG_UUID_ISlangBlob;
+
+/* static */ISlangUnknown* StringBlob::getInterface(const Guid& guid)
+{
+    return (guid == IID_ISlangUnknown || guid == IID_ISlangBlob) ? static_cast<ISlangBlob*>(this) : nullptr;
+}
+
+// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! StringUtil !!!!!!!!!!!!!!!!!!!!!!!!!!!
+
 /* static */void StringUtil::split(const UnownedStringSlice& in, char splitChar, List<UnownedStringSlice>& slicesOut)
 {
     slicesOut.Clear();
@@ -74,4 +87,28 @@ namespace Slang {
     return builder;
 }
 
+/* static */String StringUtil::getString(ISlangBlob* blob)
+{
+    if (blob)
+    {
+        size_t size = blob->getBufferSize();
+        if (size > 0)
+        {
+            const char* contents = (const char*)blob->getBufferPointer();
+            // Check it has terminating 0, if not we must construct as if it does
+            if (contents[size - 1] == 0)
+            {
+                size--;
+            }
+            return String(contents, contents + size);
+        }
+    }
+    return String();
+}
+
+ComPtr<ISlangBlob> StringUtil::createStringBlob(const String& string)
+{
+    return ComPtr<ISlangBlob>(new StringBlob(string));
+}
+
 } // namespace Slang
-- 
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