bindings/go/llvm/bitreader.go

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