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--- a/tools/clang/include/clang-c/Index.h
+++ a/tools/clang/include/clang-c/Index.h
@@ -404,6 +404,21 @@
const char *file_name);
/**
+ * \brief Retrieve the buffer associated with the given file.
+ *
+ * \param tu the translation unit
+ *
+ * \param file the file for which to retrieve the buffer.
+ *
+ * \param size [out] if non-NULL, will be set to the size of the buffer.
+ *
+ * \returns a pointer to the buffer in memory that holds the contents of
+ * \p file, or a NULL pointer when the file is not loaded.
+ */
+CINDEX_LINKAGE const char *clang_getFileContents(CXTranslationUnit tu,
+ CXFile file, size_t *size);
+
+/**
* \brief Returns non-zero if the \c file1 and \c file2 point to the same file,
* or they are both NULL.
*/
--- a/tools/clang/tools/libclang/CIndex.cpp
+++ a/tools/clang/tools/libclang/CIndex.cpp
@@ -4162,6 +4162,27 @@
return const_cast<FileEntry *>(FMgr.getFile(file_name));
}
+const char *clang_getFileContents(CXTranslationUnit TU, CXFile file,
+ size_t *size) {
+ if (isNotUsableTU(TU)) {
+ LOG_BAD_TU(TU);
+ return nullptr;
+ }
+
+ const SourceManager &SM = cxtu::getASTUnit(TU)->getSourceManager();
+ FileID fid = SM.translateFile(static_cast<FileEntry *>(file));
+ bool Invalid = true;
+ llvm::MemoryBuffer *buf = SM.getBuffer(fid, &Invalid);
+ if (Invalid) {
+ if (size)
+ *size = 0;
+ return nullptr;
+ }
+ if (size)
+ *size = buf->getBufferSize();
+ return buf->getBufferStart();
+}
+
unsigned clang_isFileMultipleIncludeGuarded(CXTranslationUnit TU,
CXFile file) {
if (isNotUsableTU(TU)) {
--- a/tools/clang/tools/libclang/libclang.exports
+++ b/tools/clang/tools/libclang/libclang.exports
@@ -216,6 +216,7 @@ clang_getExceptionSpecificationType
clang_getFieldDeclBitWidth
clang_getExpansionLocation
clang_getFile
+clang_getFileContents
clang_getFileLocation
clang_getFileName
clang_getFileTime
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