Parser.cpp revision b576c94c15af9a440f69d9d03c2afead7971118c 
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 "llvm/Analysis/Verifier.h"
15#include "llvm/Module.h"
16#include "ParserInternals.h"
17using std::string;
18
19// The useful interface defined by this file... Parse an ASCII file, and return
20// the internal representation in a nice slice'n'dice'able representation.
21//
22Module *ParseAssemblyFile(const string &Filename) { // throw (ParseException)
23  FILE *F = stdin;
24
25  if (Filename != "-") {
26    F = fopen(Filename.c_str(), "r");
27
28    if (F == 0)
29      throw ParseException(Filename, "Could not open file '" + Filename + "'");
30  }
31
32  Module *Result;
33  try {
34    Result = RunVMAsmParser(Filename, F);
35  } catch (...) {
36    if (F != stdin) fclose(F);      // Make sure to close file descriptor if an
37    throw;                          // exception is thrown
38  }
39
40  if (F != stdin)
41    fclose(F);
42
43  return Result;
44}
45
46
47//===------------------------------------------------------------------------===
48//                              ParseException Class
49//===------------------------------------------------------------------------===
50
51
52ParseException::ParseException(const string &filename, const string &message,
53			       int lineNo, int colNo)
54  : Filename(filename), Message(message) {
55  LineNo = lineNo; ColumnNo = colNo;
56}
57
58ParseException::ParseException(const ParseException &E)
59  : Filename(E.Filename), Message(E.Message) {
60  LineNo = E.LineNo;
61  ColumnNo = E.ColumnNo;
62}
63
64const string ParseException::getMessage() const { // Includes info from options
65  string Result;
66  char Buffer[10];
67
68  if (Filename == "-")
69    Result += "<stdin>";
70  else
71    Result += Filename;
72
73  if (LineNo != -1) {
74    sprintf(Buffer, "%d", LineNo);
75    Result += string(":") + Buffer;
76    if (ColumnNo != -1) {
77      sprintf(Buffer, "%d", ColumnNo);
78      Result += string(",") + Buffer;
79    }
80  }
81
82  return Result + ": " + Message;
83}
84