1//===- bitreader.go - Bindings for bitreader ------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines bindings for the bitreader component.
10//
11//===----------------------------------------------------------------------===//
12
13package llvm
14
15/*
16#include "llvm-c/BitReader.h"
17#include "llvm-c/Core.h"
18#include <stdlib.h>
19*/
20import "C"
21
22import (
23	"errors"
24	"unsafe"
25)
26
27// ParseBitcodeFile parses the LLVM IR (bitcode) in the file with the
28// specified name, and returns a new LLVM module.
29func ParseBitcodeFile(name string) (Module, error) {
30	var buf C.LLVMMemoryBufferRef
31	var errmsg *C.char
32	var cfilename *C.char = C.CString(name)
33	defer C.free(unsafe.Pointer(cfilename))
34	result := C.LLVMCreateMemoryBufferWithContentsOfFile(cfilename, &buf, &errmsg)
35	if result != 0 {
36		err := errors.New(C.GoString(errmsg))
37		C.free(unsafe.Pointer(errmsg))
38		return Module{}, err
39	}
40	defer C.LLVMDisposeMemoryBuffer(buf)
41
42	var m Module
43	if C.LLVMParseBitcode2(buf, &m.C) == 0 {
44		return m, nil
45	}
46
47	err := errors.New(C.GoString(errmsg))
48	C.free(unsafe.Pointer(errmsg))
49	return Module{}, err
50}
51