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llvm-mirror/lib/AsmParser/Parser.cpp
Reid Spencer c7c0e6c6ef For PR797:
Rid the Assembly Parser of exceptions. This is a really gross hack but it
will do until the Assembly Parser is re-written as a recursive descent.
The basic premise is that wherever the old "ThrowException" function was
called (new name: GenerateError) we set a flag (TriggerError). Every
production checks that flag and calls YYERROR if it is set. Additionally,
each call to ThrowException in the grammar is replaced with GEN_ERROR
which calls GenerateError and then YYERROR immediately. This prevents
the remaining production from continuing after an error condition.

llvm-svn: 29763
2006-08-18 08:43:06 +00:00

93 lines
2.3 KiB
C++

//===- Parser.cpp - Main dispatch module for the Parser library -------------===
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and 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 "ParserInternals.h"
#include "llvm/Module.h"
using namespace llvm;
ParseError* TheParseError = 0; /// FIXME: Not threading friendly
Module *llvm::ParseAssemblyFile(const std::string &Filename, ParseError* Err) {
FILE *F = stdin;
if (Filename != "-") {
F = fopen(Filename.c_str(), "r");
if (F == 0) {
if (Err)
Err->setError(Filename,"Could not open file '" + Filename + "'");
return 0;
}
}
TheParseError = Err;
Module *Result = RunVMAsmParser(Filename, F);
if (F != stdin)
fclose(F);
return Result;
}
Module *llvm::ParseAssemblyString(
const char * AsmString, Module * M, ParseError* Err)
{
TheParseError = Err;
return RunVMAsmParser(AsmString, M);
}
//===------------------------------------------------------------------------===
// ParseError Class
//===------------------------------------------------------------------------===
void ParseError::setError(const std::string &filename,
const std::string &message,
int lineNo, int colNo)
{
Filename = filename;
Message = message;
LineNo = lineNo;
colNo = colNo;
}
ParseError::ParseError(const ParseError &E)
: Filename(E.Filename), Message(E.Message) {
LineNo = E.LineNo;
ColumnNo = E.ColumnNo;
}
// Includes info from options
const std::string ParseError::getMessage() const {
std::string Result;
char Buffer[10];
if (Filename == "-")
Result += "<stdin>";
else
Result += Filename;
if (LineNo != -1) {
sprintf(Buffer, "%d", LineNo);
Result += std::string(":") + Buffer;
if (ColumnNo != -1) {
sprintf(Buffer, "%d", ColumnNo);
Result += std::string(",") + Buffer;
}
}
return Result + ": " + Message;
}