Move c++ parsing code from slang-cpp-extractor to static library (#5675)

* Move c++ parsing code from slang-cpp-extractor to static library

* Format code

* Remove relative includes

---------

Co-authored-by: slangbot <ellieh+slangbot@nvidia.com>
Co-authored-by: Yong He <yonghe@outlook.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/tools/slang-cpp-parser/file-util.h b/tools/slang-cpp-parser/file-util.h
new file mode 100644
index 000000000..735758384
--- /dev/null
+++ b/tools/slang-cpp-parser/file-util.h
@@ -0,0 +1,31 @@
+#pragma once
+
+#include "diagnostics.h"
+
+namespace CppParse
+{
+using namespace Slang;
+
+// A macro to define a single indent as a string
+#define CPP_EXTRACT_INDENT_STRING "    "
+
+struct FileUtil
+{
+    /// Read text into outRead. Any failures written to sink (can be passed as nullptr, for no
+    /// output)
+    static SlangResult readAllText(
+        const Slang::String& fileName,
+        DiagnosticSink* sink,
+        String& outRead);
+    /// Write text to filename. Any failures written to sink. (can be passed as nullptr, for no
+    /// output)
+    static SlangResult writeAllText(
+        const Slang::String& fileName,
+        DiagnosticSink* sink,
+        const UnownedStringSlice& text);
+
+    /// Appends CPP_EXTRACT_INDENT_STRING indentCount number of times to out
+    static void indent(Index indentCount, StringBuilder& out);
+};
+
+} // namespace CppParse