path: root/lib/Basic/Diagnostic.cpp

//===--- Diagnostic.cpp - C Language Family Diagnostic Handling -----------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This file implements the Diagnostic-related interfaces.
//
//===----------------------------------------------------------------------===//

#include "clang/AST/ASTDiagnostic.h"
#include "clang/Analysis/AnalysisDiagnostic.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/PartialDiagnostic.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Lex/LexDiagnostic.h"
#include "clang/Parse/ParseDiagnostic.h"
#include "clang/Sema/SemaDiagnostic.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"

#include <vector>
#include <map>
#include <cstring>
using namespace clang;

//===----------------------------------------------------------------------===//
// Builtin Diagnostic information
//===----------------------------------------------------------------------===//

namespace {

// Diagnostic classes.
enum {
  CLASS_NOTE       = 0x01,
  CLASS_WARNING    = 0x02,
  CLASS_EXTENSION  = 0x03,
  CLASS_ERROR      = 0x04
};

struct StaticDiagInfoRec {
  unsigned short DiagID;
  unsigned Mapping : 3;
  unsigned Class : 3;
  bool SFINAE : 1;
  unsigned Category : 5;
  
  const char *Description;
  const char *OptionGroup;

  bool operator<(const StaticDiagInfoRec &RHS) const {
    return DiagID < RHS.DiagID;
  }
};

}

static const StaticDiagInfoRec StaticDiagInfo[] = {
#define DIAG(ENUM,CLASS,DEFAULT_MAPPING,DESC,GROUP,SFINAE, CATEGORY)    \
  { diag::ENUM, DEFAULT_MAPPING, CLASS, SFINAE, CATEGORY, DESC, GROUP },
#include "clang/Basic/DiagnosticCommonKinds.inc"
#include "clang/Basic/DiagnosticDriverKinds.inc"
#include "clang/Basic/DiagnosticFrontendKinds.inc"
#include "clang/Basic/DiagnosticLexKinds.inc"
#include "clang/Basic/DiagnosticParseKinds.inc"
#include "clang/Basic/DiagnosticASTKinds.inc"
#include "clang/Basic/DiagnosticSemaKinds.inc"
#include "clang/Basic/DiagnosticAnalysisKinds.inc"
  { 0, 0, 0, 0, 0, 0, 0}
};
#undef DIAG

/// GetDiagInfo - Return the StaticDiagInfoRec entry for the specified DiagID,
/// or null if the ID is invalid.
static const StaticDiagInfoRec *GetDiagInfo(unsigned DiagID) {
  unsigned NumDiagEntries = sizeof(StaticDiagInfo)/sizeof(StaticDiagInfo[0])-1;

  // If assertions are enabled, verify that the StaticDiagInfo array is sorted.
#ifndef NDEBUG
  static bool IsFirst = true;
  if (IsFirst) {
    for (unsigned i = 1; i != NumDiagEntries; ++i) {
      assert(StaticDiagInfo[i-1].DiagID != StaticDiagInfo[i].DiagID &&
             "Diag ID conflict, the enums at the start of clang::diag (in "
             "Diagnostic.h) probably need to be increased");

      assert(StaticDiagInfo[i-1] < StaticDiagInfo[i] &&
             "Improperly sorted diag info");
    }
    IsFirst = false;
  }
#endif

  // Search the diagnostic table with a binary search.
  StaticDiagInfoRec Find = { DiagID, 0, 0, 0, 0, 0, 0 };

  const StaticDiagInfoRec *Found =
    std::lower_bound(StaticDiagInfo, StaticDiagInfo + NumDiagEntries, Find);
  if (Found == StaticDiagInfo + NumDiagEntries ||
      Found->DiagID != DiagID)
    return 0;

  return Found;
}

static unsigned GetDefaultDiagMapping(unsigned DiagID) {
  if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
    return Info->Mapping;
  return diag::MAP_FATAL;
}

/// getWarningOptionForDiag - Return the lowest-level warning option that
/// enables the specified diagnostic.  If there is no -Wfoo flag that controls
/// the diagnostic, this returns null.
const char *Diagnostic::getWarningOptionForDiag(unsigned DiagID) {
  if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
    return Info->OptionGroup;
  return 0;
}

/// getWarningOptionForDiag - Return the category number that a specified
/// DiagID belongs to, or 0 if no category.
unsigned Diagnostic::getCategoryNumberForDiag(unsigned DiagID) {
  if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
    return Info->Category;
  return 0;
}

/// getCategoryNameFromID - Given a category ID,