lib/AsmParser/Parser.cpp

   1 //===- Parser.cpp - Main dispatch module for the Parser library -------------===
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by the LLVM research group and is distributed under
   6 // the University of Illinois Open Source 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 "ParserInternals.h"
  15 #include "llvm/Module.h"
  16 using namespace llvm;
  17
  18 // The useful interface defined by this file... Parse an ASCII file, and return
  19 // the internal representation in a nice slice'n'dice'able representation.
  20 //
  21 Module *llvm::ParseAssemblyFile(const std::string &Filename) {
  22   FILE *F = stdin;
  23
  24   if (Filename != "-") {
  25     F = fopen(Filename.c_str(), "r");
  26
  27     if (F == 0)
  28       throw ParseException(Filename, "Could not open file '" + Filename + "'");
  29   }
  30
  31   Module *Result;
  32   try {
  33     Result = RunVMAsmParser(Filename, F);
  34   } catch (...) {
  35     if (F != stdin) fclose(F);      // Make sure to close file descriptor if an
  36     throw;                          // exception is thrown
  37   }
  38
  39   if (F != stdin)
  40     fclose(F);
  41
  42   return Result;
  43 }
  44
  45 Module *llvm::ParseAssemblyString(const char * AsmString, Module * M) {
  46   return RunVMAsmParser(AsmString, M);
  47 }
  48
  49
  50 //===------------------------------------------------------------------------===
  51 //                              ParseException Class
  52 //===------------------------------------------------------------------------===
  53
  54
  55 ParseException::ParseException(const std::string &filename,
  56                                const std::string &message,
  57                                int lineNo, int colNo)
  58   : Filename(filename), Message(message) {
  59   LineNo = lineNo; ColumnNo = colNo;
  60 }
  61
  62 ParseException::ParseException(const ParseException &E)
  63   : Filename(E.Filename), Message(E.Message) {
  64   LineNo = E.LineNo;
  65   ColumnNo = E.ColumnNo;
  66 }
  67
  68 // Includes info from options
  69 const std::string ParseException::getMessage() const {
  70   std::string Result;
  71   char Buffer[10];
  72
  73   if (Filename == "-")
  74     Result += "<stdin>";
  75   else
  76     Result += Filename;
  77
  78   if (LineNo != -1) {
  79     sprintf(Buffer, "%d", LineNo);
  80     Result += std::string(":") + Buffer;
  81     if (ColumnNo != -1) {
  82       sprintf(Buffer, "%d", ColumnNo);
  83       Result += std::string(",") + Buffer;
  84     }
  85   }
  86
  87   return Result + ": " + Message;
  88 }