From 67f575b6a4f6eb7a058eb8ebed7eabbdb4809899 Mon Sep 17 00:00:00 2001
From: Robert Widmann <devteam.codafi@gmail.com>
Date: Wed, 17 Apr 2019 13:29:14 +0000
Subject: [PATCH] [LLVM-C] Add DIFile Field Accesssors

Summary:
Add accessors for the file, directory, source file name (curiously, an `Optional` value?), of a DIFile.

This is intended to replace the LLVMValueRef-based accessors used in D52239

Reviewers: whitequark, jberdine, deadalnix

Reviewed By: whitequark, jberdine

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60489

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358577 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm-c/DebugInfo.h | 34 ++++++++++++++++++++++++++++++++++
 lib/IR/DebugInfo.cpp       | 25 +++++++++++++++++++++++++
 2 files changed, 59 insertions(+)

diff --git a/include/llvm-c/DebugInfo.h b/include/llvm-c/DebugInfo.h
index 414a5bf0805..33c8110a863 100644
--- a/include/llvm-c/DebugInfo.h
+++ b/include/llvm-c/DebugInfo.h
@@ -459,6 +459,40 @@ LLVMMetadataRef LLVMDILocationGetScope(LLVMMetadataRef Location);
  */
 LLVMMetadataRef LLVMDILocationGetInlinedAt(LLVMMetadataRef Location);
 
+/**
+ * Get the metadata of the file associated with a given scope.
+ * \param Scope     The scope object.
+ *
+ * @see DIScope::getFile()
+ */
+LLVMMetadataRef LLVMDIScopeGetFile(LLVMMetadataRef Scope);
+
+/**
+ * Get the directory of a given file.
+ * \param File     The file object.
+ * \param Len      The length of the returned string.
+ *
+ * @see DIFile::getDirectory()
+ */
+const char *LLVMDIFileGetDirectory(LLVMMetadataRef File, unsigned *Len);
+
+/**
+ * Get the name of a given file.
+ * \param File     The file object.
+ * \param Len      The length of the returned string.
+ *
+ * @see DIFile::getFilename()
+ */
+const char *LLVMDIFileGetFilename(LLVMMetadataRef File, unsigned *Len);
+
+/**
+ * Get the source of a given file.
+ * \param File     The file object.
+ * \param Len      The length of the returned string.
+ *
+ * @see DIFile::getSource()
+ */
+const char *LLVMDIFileGetSource(LLVMMetadataRef File, unsigned *Len);
 
 /**
  * Create a type array.
diff --git a/lib/IR/DebugInfo.cpp b/lib/IR/DebugInfo.cpp
index 124462355cd..69579047976 100644
--- a/lib/IR/DebugInfo.cpp
+++ b/lib/IR/DebugInfo.cpp
@@ -903,6 +903,31 @@ LLVMMetadataRef LLVMDILocationGetInlinedAt(LLVMMetadataRef Location) {
   return wrap(unwrapDI<DILocation>(Location)->getInlinedAt());
 }
 
+LLVMMetadataRef LLVMDIScopeGetFile(LLVMMetadataRef Scope) {
+  return wrap(unwrapDI<DIScope>(Scope)->getFile());
+}
+
+const char *LLVMDIFileGetDirectory(LLVMMetadataRef File, unsigned *Len) {
+  auto Dir = unwrapDI<DIFile>(File)->getDirectory();
+  *Len = Dir.size();
+  return Dir.data();
+}
+
+const char *LLVMDIFileGetFilename(LLVMMetadataRef File, unsigned *Len) {
+  auto Name = unwrapDI<DIFile>(File)->getFilename();
+  *Len = Name.size();
+  return Name.data();
+}
+
+const char *LLVMDIFileGetSource(LLVMMetadataRef File, unsigned *Len) {
+  if (auto Src = unwrapDI<DIFile>(File)->getSource()) {
+    *Len = Src->size();
+    return Src->data();
+  }
+  *Len = 0;
+  return "";
+}
+
 LLVMMetadataRef LLVMDIBuilderCreateEnumerator(LLVMDIBuilderRef Builder,
                                               const char *Name, size_t NameLen,
                                               int64_t Value,
-- 
2.11.0