llvm/lib/AsmParser/Parser.cpp

//===- Parser.cpp - Main dispatch module for the Parser library -----------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This library implements the functionality defined in llvm/Assembly/Parser.h
//
//===----------------------------------------------------------------------===//

#include "llvm/Assembly/Parser.h"
#include "LLParser.h"
#include "llvm/Module.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <cstring>
using namespace llvm;

Module *llvm::ParseAssemblyFile(const std::string &Filename, SMDiagnostic &Err,
                                LLVMContext &Context) {
  std::string ErrorStr;
  MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
  if (F == 0) {
    Err = SMDiagnostic("", -1, -1,
                       "Could not open input file '" + Filename + "'", "");
    return 0;
  }

  SourceMgr SM;
  SM.AddNewSourceBuffer(F, SMLoc());
  
  OwningPtr<Module> M(new Module(Filename, Context));
  if (LLParser(F, SM, Err, M.get()).Run())
    return 0;
  return M.take();
}

Module *llvm::ParseAssemblyString(const char *AsmString, Module *M,
                                  SMDiagnostic &Err, LLVMContext &Context) {
  MemoryBuffer *F =
    MemoryBuffer::getMemBuffer(AsmString, AsmString+strlen(AsmString),
                               "<string>");
  
  SourceMgr SM;
  SM.AddNewSourceBuffer(F, SMLoc());

  // If we are parsing into an existing module, do it.
  if (M)
    return LLParser(F, SM, Err, M).Run() ? 0 : M;

  // Otherwise create a new module.
  OwningPtr<Module> M2(new Module("<string>", Context));
  if (LLParser(F, SM, Err, M2.get()).Run())
    return 0;
  return M2.take();
}