C++ extractor improvements (#1803)

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

* Split of NodeTree.
Split out FileUtil.
Split out MacroWriter.

* Rename slang-cpp-extractor-main.cpp -> cpp-extractor-main.cpp

* First pass at extractor unit-tests

* Initial parsing of enum.

* Ability to disable/enable parsing of scope types.

* Initial support for typedef.

* Added operator== != to ArrayVIew.
Added test for splitting to unit tests.

* Improve comment in StringUtil.

* Fix comment.

* Fix typo.

1 files changed, 46 insertions, 0 deletions

diff --git a/source/core/slang-string-util.cpp b/source/core/slang-string-util.cpp
index b4c767c87..8108bdc98 100644
--- a/source/core/slang-string-util.cpp
+++ b/source/core/slang-string-util.cpp
@@ -56,6 +56,52 @@ namespace Slang {
     }
 }
 
+/* static */void StringUtil::split(const UnownedStringSlice& in, const UnownedStringSlice& splitSlice, List<UnownedStringSlice>& outSlices)
+{
+    const Index splitLen = splitSlice.getLength();
+
+    if (splitLen == 1)
+    {
+        return split(in, splitSlice[0], outSlices);
+    }
+
+    outSlices.clear();
+
+    SLANG_ASSERT(splitLen > 0);
+    if (splitLen <= 0)
+    {
+        return;
+    }
+
+    const char* start = in.begin();
+    const char* end = in.end();
+
+    const char splitChar = splitSlice[0];
+
+    while (start < end)
+    {
+        // Move cur so it's either at the end or at next splitSlice
+        const char* cur = start;
+        while (cur < end)
+        {
+            if (*cur == splitChar &&
+                (cur + splitLen <= end && UnownedStringSlice(cur, splitLen) == splitSlice))
+            {
+                // We hit a split
+                break;
+            }
+
+            cur++;
+        }
+      
+        // Add to output
+        outSlices.add(UnownedStringSlice(start, cur));
+
+        // Skip the split, if at end we are okay anyway
+        start = cur + splitLen;
+    }
+}
+
 /* static */Index StringUtil::split(const UnownedStringSlice& in, char splitChar, Index maxSlices, UnownedStringSlice* outSlices)
 {
     Index index = 0;