1 //===- Parser.cpp - Main dispatch module for the Parser library -----------===//
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 library implements the functionality defined in llvm/Assembly/Parser.h
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/Assembly/Parser.h"
15 #include "LLParser.h"
16 #include "llvm/Module.h"
17 #include "llvm/ADT/OwningPtr.h"
18 #include "llvm/Support/SourceMgr.h"
19 #include "llvm/Support/MemoryBuffer.h"
20 #include "llvm/Support/raw_ostream.h"
21 #include <cstring>
22 using namespace llvm;
23 
24 Module *llvm::ParseAssembly(MemoryBuffer *F,
25                             Module *M,
26                             SMDiagnostic &Err,
27                             LLVMContext &Context) {
28   SourceMgr SM;
29   SM.AddNewSourceBuffer(F, SMLoc());
30 
31   // If we are parsing into an existing module, do it.
32   if (M)
33     return LLParser(F, SM, Err, M).Run() ? 0 : M;
34 
35   // Otherwise create a new module.
36   OwningPtr<Module> M2(new Module(F->getBufferIdentifier(), Context));
37   if (LLParser(F, SM, Err, M2.get()).Run())
38     return 0;
39   return M2.take();
40 }
41 
42 Module *llvm::ParseAssemblyFile(const std::string &Filename, SMDiagnostic &Err,
43                                 LLVMContext &Context) {
44   std::string ErrorStr;
45   MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), &ErrorStr);
46   if (F == 0) {
47     Err = SMDiagnostic(Filename,
48                        "Could not open input file '" + Filename + "': " +
49                        ErrorStr);
50     return 0;
51   }
52 
53   return ParseAssembly(F, 0, Err, Context);
54 }
55 
56 Module *llvm::ParseAssemblyString(const char *AsmString, Module *M,
57                                   SMDiagnostic &Err, LLVMContext &Context) {
58   MemoryBuffer *F =
59     MemoryBuffer::getMemBuffer(StringRef(AsmString, strlen(AsmString)),
60                                "<string>");
61 
62   return ParseAssembly(F, M, Err, Context);
63 }
64