bindings/go/llvm/bitreader.go

   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
  13 package llvm
  14
  15 /*
  16 #include "llvm-c/BitReader.h"
  17 #include "llvm-c/Core.h"
  18 #include <stdlib.h>
  19 */
  20 import "C"
  21
  22 import (
  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.
  29 func 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 }