llvm-6502/lib/AsmParser/Parser.cpp
Dan Gohman 2ec5fe524c Refactor common code from ParseAssemblyString and ParseAssemblyFile,
to expose a low-level interface for parsing from an existing MemoryBuffer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80803 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-02 17:18:19 +00:00

64 lines
2.1 KiB
C++

//===- 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::ParseAssembly(MemoryBuffer *F,
const std::string &Name,
Module *M,
SMDiagnostic &Err,
LLVMContext &Context) {
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(Name, Context));
if (LLParser(F, SM, Err, M2.get()).Run())
return 0;
return M2.take();
}
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;
}
return ParseAssembly(F, Filename, 0, Err, Context);
}
Module *llvm::ParseAssemblyString(const char *AsmString, Module *M,
SMDiagnostic &Err, LLVMContext &Context) {
MemoryBuffer *F =
MemoryBuffer::getMemBuffer(AsmString, AsmString+strlen(AsmString),
"<string>");
return ParseAssembly(F, "<string>", M, Err, Context);
}