1 //===- Parser.cpp - Main dispatch module for the Parser library -------------===
2 //
3 // This library implements the functionality defined in llvm/assembly/parser.h
4 //
5 //===------------------------------------------------------------------------===
6 
7 #include "llvm/Analysis/Verifier.h"
8 #include "llvm/Module.h"
9 #include "ParserInternals.h"
10 using std::string;
11 
12 // The useful interface defined by this file... Parse an ascii file, and return
13 // the internal representation in a nice slice'n'dice'able representation.
14 //
15 Module *ParseAssemblyFile(const string &Filename) { // throw (ParseException)
16   FILE *F = stdin;
17 
18   if (Filename != "-") {
19     F = fopen(Filename.c_str(), "r");
20 
21     if (F == 0)
22       throw ParseException(Filename, "Could not open file '" + Filename + "'");
23   }
24 
25   Module *Result;
26   try {
27     Result = RunVMAsmParser(Filename, F);
28   } catch (...) {
29     if (F != stdin) fclose(F);      // Make sure to close file descriptor if an
30     throw;                          // exception is thrown
31   }
32 
33   if (F != stdin)
34     fclose(F);
35 
36   if (Result) {  // Check to see that it is valid...
37     if (verifyModule(Result)) {
38       delete Result;
39       throw ParseException(Filename, "Source file is not well formed LLVM!");
40     }
41   }
42   return Result;
43 }
44 
45 
46 //===------------------------------------------------------------------------===
47 //                              ParseException Class
48 //===------------------------------------------------------------------------===
49 
50 
51 ParseException::ParseException(const string &filename, const string &message,
52 			       int lineNo, int colNo)
53   : Filename(filename), Message(message) {
54   LineNo = lineNo; ColumnNo = colNo;
55 }
56 
57 ParseException::ParseException(const ParseException &E)
58   : Filename(E.Filename), Message(E.Message) {
59   LineNo = E.LineNo;
60   ColumnNo = E.ColumnNo;
61 }
62 
63 const string ParseException::getMessage() const { // Includes info from options
64   string Result;
65   char Buffer[10];
66 
67   if (Filename == "-")
68     Result += "<stdin>";
69   else
70     Result += Filename;
71 
72   if (LineNo != -1) {
73     sprintf(Buffer, "%d", LineNo);
74     Result += string(":") + Buffer;
75     if (ColumnNo != -1) {
76       sprintf(Buffer, "%d", ColumnNo);
77       Result += string(",") + Buffer;
78     }
79   }
80 
81   return Result + ": " + Message;
82 }
83