Add a set of C bindings for the Object interface.

Patch by Patrick Walton!

llvm-svn: 128798

include/llvm-c/Object.h

@@ -0,0 +1,77 @@
+/*===-- llvm-c/Object.h - Object Lib C Iface --------------------*- C++ -*-===*/
+/*                                                                            */
+/*                     The LLVM Compiler Infrastructure                       */
+/*                                                                            */
+/* This file is distributed under the University of Illinois Open Source      */
+/* License. See LICENSE.TXT for details.                                      */
+/*                                                                            */
+/*===----------------------------------------------------------------------===*/
+/*                                                                            */
+/* This header declares the C interface to libLLVMObject.a, which             */
+/* implements object file reading and writing.                                */
+/*                                                                            */
+/* Many exotic languages can interoperate with C code but have a harder time  */
+/* with C++ due to name mangling. So in addition to C, this interface enables */
+/* tools written in such languages.                                           */
+/*                                                                            */
+/*===----------------------------------------------------------------------===*/
+
+#ifndef LLVM_C_OBJECT_H
+#define LLVM_C_OBJECT_H
+
+#include "llvm-c/Core.h"
+#include "llvm/Config/llvm-config.h"
+
+#ifdef __cplusplus
+#include "llvm/Object/ObjectFile.h"
+
+extern "C" {
+#endif
+
+
+typedef struct LLVMOpaqueObjectFile *LLVMObjectFileRef;
+
+typedef struct LLVMOpaqueSectionIterator *LLVMSectionIteratorRef;
+
+LLVMObjectFileRef LLVMCreateObjectFile(LLVMMemoryBufferRef MemBuf);
+void LLVMDisposeObjectFile(LLVMObjectFileRef ObjectFile);
+
+LLVMSectionIteratorRef LLVMGetSections(LLVMObjectFileRef ObjectFile);
+void LLVMDisposeSectionIterator(LLVMSectionIteratorRef SI);
+LLVMBool LLVMIsSectionIteratorAtEnd(LLVMObjectFileRef ObjectFile,
+                                LLVMSectionIteratorRef SI);
+void LLVMMoveToNextSection(LLVMSectionIteratorRef SI);
+const char *LLVMGetSectionName(LLVMSectionIteratorRef SI);
+uint64_t LLVMGetSectionSize(LLVMSectionIteratorRef SI);
+const char *LLVMGetSectionContents(LLVMSectionIteratorRef SI);
+
+
+#ifdef __cplusplus
+}
+
+namespace llvm {
+  namespace object {
+    inline ObjectFile *unwrap(LLVMObjectFileRef OF) {
+      return reinterpret_cast<ObjectFile*>(OF);
+    }
+
+    inline LLVMObjectFileRef wrap(const ObjectFile *OF) {
+      return reinterpret_cast<LLVMObjectFileRef>(const_cast<ObjectFile*>(OF));
+    }
+
+    inline ObjectFile::section_iterator *unwrap(LLVMSectionIteratorRef SI) {
+      return reinterpret_cast<ObjectFile::section_iterator*>(SI);
+    }
+
+    inline LLVMSectionIteratorRef
+    wrap(const ObjectFile::section_iterator *SI) {
+      return reinterpret_cast<LLVMSectionIteratorRef>
+        (const_cast<ObjectFile::section_iterator*>(SI));
+    }
+  }
+}
+
+#endif /* defined(__cplusplus) */
+
+#endif
+

lib/VMCore/CMakeLists.txt

@@ -24,6 +24,7 @@ add_llvm_library(LLVMCore
   LeakDetector.cpp
   Metadata.cpp
   Module.cpp
+  Object.cpp
   Pass.cpp
   PassManager.cpp
   PassRegistry.cpp

lib/VMCore/Object.cpp

@@ -0,0 +1,59 @@
+//===- Object.cpp - C bindings to the object file library--------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the C bindings to the file-format-independent object
+// library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/ObjectFile.h"
+#include "llvm-c/Object.h"
+
+using namespace llvm;
+using namespace object;
+
+LLVMObjectFileRef LLVMCreateObjectFile(LLVMMemoryBufferRef MemBuf) {
+  return wrap(ObjectFile::createObjectFile(unwrap(MemBuf)));
+}
+
+void LLVMDisposeObjectFile(LLVMObjectFileRef ObjectFile) {
+  delete unwrap(ObjectFile);
+}
+
+LLVMSectionIteratorRef LLVMGetSections(LLVMObjectFileRef ObjectFile) {
+  ObjectFile::section_iterator SI = unwrap(ObjectFile)->begin_sections();
+  return wrap(new ObjectFile::section_iterator(SI));
+}
+
+void LLVMDisposeSectionIterator(LLVMSectionIteratorRef SI) {
+  delete unwrap(SI);
+}
+
+LLVMBool LLVMIsSectionIteratorAtEnd(LLVMObjectFileRef ObjectFile,
+                                LLVMSectionIteratorRef SI) {
+  return (*unwrap(SI) == unwrap(ObjectFile)->end_sections()) ? 1 : 0;
+}
+
+void LLVMMoveToNextSection(LLVMSectionIteratorRef SI) {
+  // We can't use unwrap() here because the argument to ++ must be an lvalue.
+  ++*reinterpret_cast<ObjectFile::section_iterator*>(SI);
+}
+
+const char *LLVMGetSectionName(LLVMSectionIteratorRef SI) {
+  return (*unwrap(SI))->getName().data();
+}
+
+uint64_t LLVMGetSectionSize(LLVMSectionIteratorRef SI) {
+  return (*unwrap(SI))->getSize();
+}
+
+const char *LLVMGetSectionContents(LLVMSectionIteratorRef SI) {
+  return (*unwrap(SI))->getContents().data();
+}
+