/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#ifndef cmLocalGenerator_h
#define cmLocalGenerator_h

#include "cmStandardIncludes.h"
#include "cmState.h"
#include "cmOutputConverter.h"

class cmMakefile;
class cmGlobalGenerator;
class cmGeneratorTarget;
class cmTarget;
class cmTargetManifest;
class cmSourceFile;
class cmCustomCommand;
class cmCustomCommandGenerator;

/** \class cmLocalGenerator
 * \brief Create required build files for a directory.
 *
 * Subclasses of this abstract class generate makefiles, DSP, etc for various
 * platforms. This class should never be constructed directly. A
 * GlobalGenerator will create it and invoke the appropriate commands on it.
 */
class cmLocalGenerator : public cmOutputConverter
{
public:
  cmLocalGenerator(cmGlobalGenerator* gg, cmLocalGenerator* parent,
                   cmState::Snapshot snapshot);
  virtual ~cmLocalGenerator();

  /// @return whether we are processing the top CMakeLists.txt file.
  bool IsRootMakefile() const;

  /**
   * Generate the makefile for this directory.
   */
  virtual void Generate() {}

  virtual void ComputeHomeRelativeOutputPath() {}

  /**
   * Calls TraceVSDependencies() on all targets of this generator.
   */
  void TraceDependencies();

  virtual void AddHelperCommands() {}

  /**
   * Generate the install rules files in this directory.
   */
  void GenerateInstallRules();

  /**
   * Generate the test files for tests.
   */
  void GenerateTestFiles();

  /**
   * Generate a manifest of target files that will be built.
   */
  void GenerateTargetManifest();

  ///! Get the makefile for this generator
  cmMakefile *GetMakefile() {
    return this->Makefile; }

  ///! Get the makefile for this generator, const version
    const cmMakefile *GetMakefile() const {
      return this->Makefile; }

  ///! Get the GlobalGenerator this is associated with
  cmGlobalGenerator *GetGlobalGenerator() {
    return this->GlobalGenerator; }
  const cmGlobalGenerator *GetGlobalGenerator() const {
    return this->GlobalGenerator; }

  cmState* GetState() const;
  cmState::Snapshot GetStateSnapshot() const;

  ///! set/get the parent generator
  cmLocalGenerator* GetParent() const {return this->Parent;}

  ///! set/get the children
  void AddChild(cmLocalGenerator* g) { this->Children.push_back(g); }
  std::vector<cmLocalGenerator*>& GetChildren() { return this->Children; }


  void AddArchitectureFlags(std::string& flags,
                            cmGeneratorTarget const* target,
                            const std::string&lang, const std::string& config);

  void AddLanguageFlags(std::string& flags, const std::string& lang,
                        const std::string& config);
  void AddCMP0018Flags(std::string &flags, cmTarget const* target,
                       std::string const& lang, const std::string& config);
  void AddVisibilityPresetFlags(std::string &flags, cmTarget const* target,
                                const std::string& lang);
  void AddConfigVariableFlags(std::string& flags, const std::string& var,
                              const std::string& config);
  void AddCompilerRequirementFlag(std::string &flags, cmTarget const* target,
                                  const std::string& lang);
  ///! Append flags to a string.
  virtual void AppendFlags(std::string& flags, const std::string& newFlags);
  virtual void AppendFlags(std::string& flags, const char* newFlags);
  virtual void AppendFlagEscape(std::string& flags,
                                const std::string& rawFlag);
  ///! Get the include flags for the current makefile and language
  std::string GetIncludeFlags(const std::vector<std::string> &includes,
                              cmGeneratorTarget* target,
                              const std::string& lang,
                              bool forceFullPaths = false,
                              bool forResponseFile = false,
                              const std::string& config = "");

  /**
   * Encode a list of preprocessor definitions for the compiler
   * command line.
   */
  void AppendDefines(std::set<std::string>& defines,
                     const char* defines_list);
  void AppendDefines(std::set<std::string>& defines,
                     std::string defines_list)
  {
    this->AppendDefines(defines, defines_list.c_str());
  }
  void AppendDefines(std::set<std::string>& defines,
                     const std::vector<std::string> &defines_vec);

  /**
   * Join a set of defines into a definesString with a space separator.
   */
  void JoinDefines(const std::set<std::string>& defines,
                   std::string &definesString,
                   const std::string& lang);

  /** Lookup and append options associated with a particular feature.  */
  void AppendFeatureOptions(std::string& flags, const std::string& lang,
                            const char* feature);

  const char* GetFeature(const std::string& feature,
                         const std::string& config);

  /** \brief Get absolute path to dependency \a name
   *
   * Translate a dependency as given in CMake code to the name to
   * appear in a generated build file.
   * - If \a name is a utility target, returns false.
   * - If \a name is a CMake target, it will be transformed to the real output
   *   location of that target for the given configuration.
   * - If \a name is the full path to a file, it will be returned.
   * - Otherwise \a name is treated as a relative path with respect to
   *   the source directory of this generator.  This should only be
   *   used for dependencies of custom commands.
   */
  bool GetRealDependency(const std::string& name, const std::string& config,
                         std::string& dep);

  virtual std::string ConvertToIncludeReference(std::string const& path,
                                                OutputFormat format = SHELL,
                                                bool forceFullPaths = false);

  /** Called from command-line hook to clear dependencies.  */
  virtual void ClearDependencies(cmMakefile* /* mf */,
                                 bool /* verbose */) {}

  /** Called from command-line hook to update dependencies.  */
  virtual bool UpdateDependencies(const char* /* tgtInfo */,
                                  bool /*verbose*/,
                                  bool /*color*/)
    { return true; }

  /** Get the include flags for the current makefile and language.  */
  void GetIncludeDirectories(std::vector<std::string>& dirs,
                             cmGeneratorTarget* target,
                             const std::string& lang = "C",
                             const std::string& config = "",
                             bool stripImplicitInclDirs = true);
  void AddCompileOptions(std::string& flags, cmTarget* target,
                         const std::string& lang, const std::string& config);
  void AddCompileDefinitions(std::set<std::string>& defines,
                             cmTarget const* target,
                             const std::string& config,
                             const std::string& lang);

  /** Compute the language used to compile the given source file.  */
  std::string GetSourceFileLanguage(const cmSourceFile& source);

  // Fill the vector with the target names for the object files,
  // preprocessed files and assembly files.
  virtual void GetIndividualFileTargets(std::vector<std::string>&) {}

  // Create a struct to hold the varibles passed into
  // ExpandRuleVariables
  struct RuleVariables
  {
    RuleVariables()
      {
        memset(this, 0,  sizeof(*this));
      }
    cmTarget* CMTarget;
    const char* TargetPDB;
    const char* TargetCompilePDB;
    const char* TargetVersionMajor;
    const char* TargetVersionMinor;
    const char* Language;
    const char* Objects;
    const char* Target;
    const char* LinkLibraries;
    const char* Source;
    const char* AssemblySource;
    const char* PreprocessedSource;
    const char* Output;
    const char* Object;
    const char* ObjectDir;
    const char* ObjectFileDir;
    const char* Flags;
    const char* ObjectsQuoted;
    const char* SONameFlag;
    const char* TargetSOName;
    const char* TargetInstallNameDir;
    const char* LinkFlags;
    const char* LanguageCompileFlags;
    const char* Defines;
    const char* RuleLauncher;
    const char* DependencyFile;
    const char* FilterPrefix;
  };

  /**
   * Get the relative path from the generator output directory to a
   * per-target support directory.
   */
  virtual std::string GetTargetDirectory(cmTarget const& target) const;

  /**
   * Get the level of backwards compatibility requested by the project
   * in this directory.  This is the value of the CMake variable
   * CMAKE_BACKWARDS_COMPATIBILITY whose format is
   * "major.minor[.patch]".  The returned integer is encoded as
   *
   *   CMake_VERSION_ENCODE(major, minor, patch)
   *
   * and is monotonically increasing with the CMake version.
   */
  cmIML_INT_uint64_t GetBackwardsCompatibility();

  /**
   * Test whether compatibility is set to a given version or lower.
   */
  bool NeedBackwardsCompatibility_2_4();

  /**
   * Generate a Mac OS X application bundle Info.plist file.
   */
  void GenerateAppleInfoPList(cmTarget* target, const std::string& targetName,
                              const char* fname);

  /**
   * Generate a Mac OS X framework Info.plist file.
   */
  void GenerateFrameworkInfoPList(cmTarget* target,
                                  const std::string& targetName,
                                  const char* fname);
  /** Construct a comment for a custom command.  */
  std::string ConstructComment(cmCustomCommandGenerator const& ccg,
                               const char* default_comment = "");
  // Compute object file names.
  std::string GetObjectFileNameWithoutTarget(const cmSourceFile& source,
                                             std::string const& dir_max,
                                             bool* hasSourceExtension = 0);

  /** Fill out the static linker flags for the given target.  */
  void GetStaticLibraryFlags(std::string& flags,
                             std::string const& config,
                             cmTarget* target);

  /** Fill out these strings for the given target.  Libraries to link,
   *  flags, and linkflags. */
  void GetTargetFlags(std::string& linkLibs,
                      std::string& flags,
                      std::string& linkFlags,
                      std::string& frameworkPath,
                      std::string& linkPath,
                      cmGeneratorTarget* target,
                      bool useWatcomQuote);

  virtual void ComputeObjectFilenames(
                        std::map<cmSourceFile const*, std::string>& mapping,
                        cmGeneratorTarget const* gt = 0);

  bool IsWindowsShell() const;
  bool IsWatcomWMake() const;
  bool IsMinGWMake() const;
  bool IsNMake() const;

  void ComputeObjectMaxPath();
protected:
  ///! put all the libraries for a target on into the given stream
  void OutputLinkLibraries(std::string& linkLibraries,
                                   std::string& frameworkPath,
                                   std::string& linkPath,
                                   cmGeneratorTarget &,
                                   bool relink,
                                   bool forResponseFile,
                                   bool useWatcomQuote);

  // Expand rule variables in CMake of the type found in language rules
  void ExpandRuleVariables(std::string& string,
                           const RuleVariables& replaceValues);
  // Expand rule variables in a single string
  std::string ExpandRuleVariable(std::string const& variable,
                                 const RuleVariables& replaceValues);

  const char* GetRuleLauncher(cmTarget* target, const std::string& prop);
  void InsertRuleLauncher(std::string& s, cmTarget* target,
                          const std::string& prop);


  /** Convert a target to a utility target for unsupported
   *  languages of a generator */
  void AddBuildTargetRule(const std::string& llang,
                          cmGeneratorTarget& target);
  ///! add a custom command to build a .o file that is part of a target
  void AddCustomCommandToCreateObject(const char* ofname,
                                      const std::string& lang,
                                      cmSourceFile& source,
                                      cmGeneratorTarget& target);
  // Create Custom Targets and commands for unsupported languages
  // The set passed in should contain the languages supported by the
  // generator directly.  Any targets containing files that are not
  // of the types listed will be compiled as custom commands and added
  // to a custom target.
  void CreateCustomTargetsAndCommands(std::set<std::string> const&);

  // Handle old-style install rules stored in the targets.
  void GenerateTargetInstallRules(
    std::ostream& os, const std::string& config,
    std::vector<std::string> const& configurationTypes);

  std::string& CreateSafeUniqueObjectFileName(const std::string& sin,
                                              std::string const& dir_max);

  virtual std::string ConvertToLinkReference(std::string const& lib,
                                             OutputFormat format = SHELL);

  /** Check whether the native build system supports the given
      definition.  Issues a warning.  */
  virtual bool CheckDefinition(std::string const& define) const;

  cmMakefile *Makefile;
  cmState::Snapshot StateSnapshot;
  cmGlobalGenerator *GlobalGenerator;
  cmLocalGenerator* Parent;
  std::vector<cmLocalGenerator*> Children;
  std::map<std::string, std::string> UniqueObjectNamesMap;
  std::string::size_type ObjectPathMax;
  std::set<std::string> ObjectMaxPathViolations;

  std::set<cmTarget const*> WarnCMP0063;

  bool EmitUniversalBinaryFlags;

  // Hack for ExpandRuleVariable until object-oriented version is
  // committed.
  std::string TargetImplib;

  cmIML_INT_uint64_t BackwardsCompatibility;
  bool BackwardsCompatibilityFinal;
private:
  void AddSharedFlags(std::string& flags, const std::string& lang,
                      bool shared);
  bool GetShouldUseOldFlags(bool shared, const std::string &lang) const;
  void AddPositionIndependentFlags(std::string& flags, std::string const& l,
                                   int targetType);
};

#endif
