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bitreader.go

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//===- bitreader.go - Bindings for bitreader ------------------------------===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

//

// This file defines bindings for the bitreader component.

//

//===----------------------------------------------------------------------===//

package llvm

/*

#include "llvm-c/BitReader.h"

#include "llvm-c/Core.h"

#include <stdlib.h>

*/

import "C"

import (

"errors"

"unsafe"

)

// ParseBitcodeFile parses the LLVM IR (bitcode) in the file with the specified

// name, and returns a new LLVM module.

func (c Context) ParseBitcodeFile(name string) (Module, error) {

var buf C.LLVMMemoryBufferRef

var errmsg *C.char

var cfilename *C.char = C.CString(name)

defer C.free(unsafe.Pointer(cfilename))

result := C.LLVMCreateMemoryBufferWithContentsOfFile(cfilename, &buf, &errmsg)

if result != 0 {

err := errors.New(C.GoString(errmsg))

C.free(unsafe.Pointer(errmsg))

return Module{}, err

}

defer C.LLVMDisposeMemoryBuffer(buf)

var m Module

if C.LLVMParseBitcodeInContext2(c.C, buf, &m.C) == 0 {

return m, nil

}

err := errors.New(C.GoString(errmsg))

C.free(unsafe.Pointer(errmsg))

return Module{}, err

}