From 4cb899f824ee5e4421f36506e4c77f682b238b09 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Thu, 16 Mar 2023 15:19:20 -0400
Subject: Preliminary SourceMap support (#2701)

* #include an absolute path didn't work - because paths were taken to always be relative.

* WIP source map.

* Split out handling of RttiTypeFuncs to a map type.

* Make RttiTypeFuncsMap hold default impls.

* Slightly more sophisticated RttiTypeFuncsMap

* Source map decoding.

* Fix tabs.

* Fix asserts due to negative values.

* Use less obscure mechanisms in SourceMap.
---
 source/core/slang-rtti-info.cpp | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'source/core/slang-rtti-info.cpp')

diff --git a/source/core/slang-rtti-info.cpp b/source/core/slang-rtti-info.cpp
index 043e6490a..c35444d03 100644
--- a/source/core/slang-rtti-info.cpp
+++ b/source/core/slang-rtti-info.cpp
@@ -2,6 +2,8 @@
 
 #include "../../slang-com-helper.h"
 
+#include "slang-rtti-util.h"
+
 #include <mutex>
 
 namespace Slang {
@@ -191,4 +193,35 @@ StructRttiInfo StructRttiBuilder::make()
     return m_rttiInfo;
 }
 
+/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! RttiTypeFuncsMap !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
+
+RttiTypeFuncs RttiTypeFuncsMap::getFuncsForType(const RttiInfo* rttiInfo)
+{
+    if (auto funcsPtr = m_map.TryGetValue(rttiInfo))
+    {
+        return *funcsPtr;
+    }
+
+    // Try to get the default impl
+    // NOTE! funcs could be invalid if there is no default impl.
+    const auto funcs = RttiUtil::getDefaultTypeFuncs(rttiInfo);
+
+    // Add to the map
+    m_map.Add(rttiInfo, funcs);
+    return funcs;
+}
+
+void RttiTypeFuncsMap::add(const RttiInfo* rttiInfo, const RttiTypeFuncs& funcs)
+{
+    if (auto funcsPtr = m_map.TryGetValueOrAdd(rttiInfo, funcs))
+    {
+        // If there are funcs set, they aren't valid otherwise this would be 
+        // replacing, so assert on that scenario.
+        SLANG_ASSERT(!funcsPtr->isValid());
+
+        // Replace the funcs
+        *funcsPtr = funcs;
+    }
+}
+
 } // namespace Slang
-- 
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