Mock up of the software. Fully generated with Gemini 3.8 as a proof of concept.

vendor/llvm/include/clang-c/CXFile.h

@@ -0,0 +1,83 @@
+/*===-- clang-c/CXFile.h - C Index File ---------------------------*- C -*-===*\
+|*                                                                            *|
+|* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
+|* Exceptions.                                                                *|
+|* See https://llvm.org/LICENSE.txt for license information.                  *|
+|* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
+|*                                                                            *|
+|*===----------------------------------------------------------------------===*|
+|*                                                                            *|
+|* This header provides the interface to C Index files.                       *|
+|*                                                                            *|
+\*===----------------------------------------------------------------------===*/
+
+#ifndef LLVM_CLANG_C_CXFILE_H
+#define LLVM_CLANG_C_CXFILE_H
+
+#include <time.h>
+
+#include "clang-c/CXString.h"
+#include "clang-c/ExternC.h"
+#include "clang-c/Platform.h"
+
+LLVM_CLANG_C_EXTERN_C_BEGIN
+
+/**
+ * \defgroup CINDEX_FILES File manipulation routines
+ *
+ * @{
+ */
+
+/**
+ * A particular source file that is part of a translation unit.
+ */
+typedef void *CXFile;
+
+/**
+ * Retrieve the complete file and path name of the given file.
+ */
+CINDEX_LINKAGE CXString clang_getFileName(CXFile SFile);
+
+/**
+ * Retrieve the last modification time of the given file.
+ */
+CINDEX_LINKAGE time_t clang_getFileTime(CXFile SFile);
+
+/**
+ * Uniquely identifies a CXFile, that refers to the same underlying file,
+ * across an indexing session.
+ */
+typedef struct {
+  unsigned long long data[3];
+} CXFileUniqueID;
+
+/**
+ * Retrieve the unique ID for the given \c file.
+ *
+ * \param file the file to get the ID for.
+ * \param outID stores the returned CXFileUniqueID.
+ * \returns If there was a failure getting the unique ID, returns non-zero,
+ * otherwise returns 0.
+ */
+CINDEX_LINKAGE int clang_getFileUniqueID(CXFile file, CXFileUniqueID *outID);
+
+/**
+ * Returns non-zero if the \c file1 and \c file2 point to the same file,
+ * or they are both NULL.
+ */
+CINDEX_LINKAGE int clang_File_isEqual(CXFile file1, CXFile file2);
+
+/**
+ * Returns the real path name of \c file.
+ *
+ * An empty string may be returned. Use \c clang_getFileName() in that case.
+ */
+CINDEX_LINKAGE CXString clang_File_tryGetRealPathName(CXFile file);
+
+/**
+ * @}
+ */
+
+LLVM_CLANG_C_EXTERN_C_END
+
+#endif