ENH: Added cmStringStream class to wrap std::stringstream or std::strstream...

ENH: Added cmStringStream class to wrap std::stringstream or std::strstream depending on the platform.  The interface is that of std::stringstream, so no "ends" or "rdbuf()->freeze(0)" lines are needed.

Source/cmBorlandMakefileGenerator.cxx

@@ -251,12 +251,10 @@ void cmBorlandMakefileGenerator::OutputSharedLibraryRule(std::ostream& fout,
   command += "-e";
   command += target;
   command += " ";
-  std::strstream linklibs;
+  cmStringStream linklibs;
   this->OutputLinkLibraries(linklibs, name, t);
-  linklibs << std::ends;
   // then the linker options -L and libraries (any other order will fail!)
   command += linklibs.str();
-  delete [] linklibs.str();
   // then list of object files 
   command += " $(" + this->CreateMakeVariable(name, "_SRC_OBJS") + ") ";
   std::string command2 = "implib -w ";
@@ -353,11 +351,9 @@ void cmBorlandMakefileGenerator::OutputExecutableRule(std::ostream& fout,
     {
     command += " -tWC ";
     }
-  std::strstream linklibs;
+  cmStringStream linklibs;
   this->OutputLinkLibraries(linklibs, 0, t);
-  linklibs << std::ends;
   command += linklibs.str();
-  delete [] linklibs.str();
   command += " $(" +  this->CreateMakeVariable(name, "_SRC_OBJS") + ")";
   
   std::string comment = "rule to build executable: ";

Source/cmCMakeMinimumRequired.cxx

@@ -35,11 +35,10 @@ bool cmCMakeMinimumRequired::InitialPass(std::vector<std::string> const& args)
   sscanf(args[1].c_str(), "%f", &reqVersion);
   if(reqVersion > version)
     {
-    std::strstream str;
+    cmStringStream str;
     str << "WARNING: This project requires version: " << args[1].c_str() << " of cmake.\n"
-        << "You are running version: " << version << std::ends;
-    cmSystemTools::Message(str.str());
-    delete [] str.str();
+        << "You are running version: " << version;
+    cmSystemTools::Message(str.str().c_str());
     }
   return true;
 }

Source/cmConfigure.cmake.h.in

 #cmakedefine CMAKE_NO_STD_NAMESPACE
 #cmakedefine CMAKE_NO_ANSI_STREAM_HEADERS
+#cmakedefine CMAKE_NO_ANSI_STRING_STREAM
 #cmakedefine CMAKE_NO_ANSI_FOR_SCOPE
 #define  CMAKE_ROOT_DIR "${CMake_SOURCE_DIR}"
 #define  CMAKE_BUILD_DIR "${CMake_BINARY_DIR}"

Source/cmConfigure.h.in

 #undef CMAKE_NO_STD_NAMESPACE
 #undef CMAKE_NO_ANSI_STREAM_HEADERS
+#undef CMAKE_NO_ANSI_STRING_STREAM
 #undef CMAKE_NO_ANSI_FOR_SCOPE
 

Source/cmNMakeMakefileGenerator.cxx

@@ -431,11 +431,9 @@ void cmNMakeMakefileGenerator::OutputSharedLibraryRule(std::ostream& fout,
 
   command += " $(" + this->CreateMakeVariable(name, "_SRC_OBJS") + ") ";
 
-  std::strstream linklibs;
+  cmStringStream linklibs;
   this->OutputLinkLibraries(linklibs, name, t);
-  linklibs << std::ends;
   command += linklibs.str();
-  delete [] linklibs.str();
 
   const std::vector<cmSourceFile*>& sources = t.GetSourceFiles();
   for(std::vector<cmSourceFile*>::const_iterator i = sources.begin();
@@ -541,9 +539,8 @@ void cmNMakeMakefileGenerator::OutputExecutableRule(std::ostream& fout,
     command +=  " /subsystem:windows ";
     }
   
-  std::strstream linklibs;
+  cmStringStream linklibs;
   this->OutputLinkLibraries(linklibs, 0, t);
-  linklibs << std::ends;
   command += linklibs.str();
 
   std::string comment = "rule to build executable: ";

Source/cmStandardIncludes.h

@@ -38,13 +38,19 @@
 #endif
 
 #ifndef CMAKE_NO_ANSI_STREAM_HEADERS
-#include <fstream>
-#include <iostream>
-#include <strstream>
+#  include <fstream>
+#  include <iostream>
 #else
-#include <fstream.h>
-#include <iostream.h>
-#include <strstream.h>
+#  include <fstream.h>
+#  include <iostream.h>
+#endif
+
+#if !defined(CMAKE_NO_ANSI_STRING_STREAM)
+#  include <sstream>
+#elif !defined(CMAKE_NO_ANSI_STREAM_HEADERS)
+#  include <strstream>
+#else
+#  include <strstream.h>
 #endif
 
 // we must have stl with the standard include style
@@ -100,7 +106,13 @@ using ::cerr;
 using ::cin;
 using ::ifstream;
 using ::ofstream;
-using ::strstream;
+  
+#if !defined(CMAKE_NO_ANSI_STRING_STREAM)
+  using ::stringstream;
+#else
+  using ::strstream;
+#endif
+  
 using ::endl;
 using ::ends;
 using ::flush;
@@ -136,5 +148,45 @@ struct cmStdString : public std::string
   cmStdString(const StdString& s, size_type pos=0, size_type n=npos):
     StdString(s, pos, n) {}
 };
-  
+
+// Define cmStringStream wrapper to hide differences between
+// std::stringstream and the old strstream.
+#if !defined(CMAKE_NO_ANSI_STRING_STREAM)
+class cmStringStream: public std::stringstream
+{
+public:
+  cmStringStream() {}
+private:
+  cmStringStream(const cmStringStream&);
+  void operator=(const cmStringStream&);
+};
+#else
+class cmStrStreamCleanup
+{
+public:
+  cmStrStreamCleanup(std::strstream& ostr): m_StrStream(ostr) {}
+  ~cmStrStreamCleanup() { m_StrStream.rdbuf()->freeze(0); }
+  static void IgnoreUnusedVariable(const cmStrStreamCleanup&) {}
+protected:
+  std::strstream& m_StrStream;
+};
+
+class cmStringStream: public std::strstream
+{
+public:
+  typedef std::strstream Superclass;
+  cmStringStream() {}
+  std::string str()
+    {
+      cmStrStreamCleanup cleanup(*this);
+      cmStrStreamCleanup::IgnoreUnusedVariable(cleanup);
+      const char* ptr = this->Superclass::str();
+      return std::string(ptr, ptr+this->pcount());
+    }
+private:
+  cmStringStream(const cmStringStream&);
+  void operator=(const cmStringStream&);
+};
+#endif
+
 #endif

Source/cmSystemTools.cxx

@@ -1068,12 +1068,11 @@ bool cmSystemTools::FilesDiffer(const char* source,
   if(statSource.st_size != static_cast<long>(finSource.gcount()) ||
      statSource.st_size != static_cast<long>(finDestination.gcount()))
     {
-    std::strstream msg;
+    cmStringStream msg;
     msg << "FilesDiffer failed to read files (allocated: " 
         << statSource.st_size << ", read source: " <<  finSource.gcount() 
-        << ", read dest: " << finDestination.gcount() << std::ends;
-    cmSystemTools::Error(msg.str());
-    delete [] msg.str();
+        << ", read dest: " << finDestination.gcount();
+    cmSystemTools::Error(msg.str().c_str());
     delete [] source_buf;
     delete [] dest_buf;
     return false;
@@ -1176,12 +1175,10 @@ void cmSystemTools::cmCopyFile(const char* source,
 
   if (statSource.st_size != statDestination.st_size)
     {
-    std::strstream msg;
+    cmStringStream msg;
     msg << "CopyFile failed to copy files (sizes differ, source: " 
-        << statSource.st_size << " , dest: " << statDestination.st_size 
-        << std::ends;
-    cmSystemTools::Error(msg.str());
-    delete [] msg.str();
+        << statSource.st_size << " , dest: " << statDestination.st_size;
+    cmSystemTools::Error(msg.str().c_str());
     }
 }
 
@@ -1427,7 +1424,7 @@ bool cmSystemTools::RunCommand(const char* command,
   if (WIFSIGNALED(retVal))
     {
     retVal = WTERMSIG(retVal);
-    std::strstream error;
+    cmStringStream error;
     error << "\nProcess terminated due to ";
     switch (retVal)
       {
@@ -1455,9 +1452,7 @@ bool cmSystemTools::RunCommand(const char* command,
 	error << "signal " << retVal;
 	break;
       }
-    error << std::ends;
     output += error.str();
-    error.rdbuf()->freeze(0);
     }
   return false;
 #endif

Source/cmUnixMakefileGenerator.cxx

@@ -655,11 +655,9 @@ void cmUnixMakefileGenerator::OutputSharedLibraryRule(std::ostream& fout,
   libName = this->ConvertToOutputPath(libName.c_str());
   command2 += libName + " \\\n";
   command2 += "\t  $(" + this->CreateMakeVariable(name, "_SRC_OBJS") + ") ";
-  std::strstream linklibs;
+  cmStringStream linklibs;
   this->OutputLinkLibraries(linklibs, name, t);
-  linklibs << std::ends;
   command2 += linklibs.str();
-  delete [] linklibs.str();
   std::string customCommands = this->CreateTargetRules(t, name);
   const char* cc = 0;
   if(customCommands.size() > 0)
@@ -699,11 +697,9 @@ void cmUnixMakefileGenerator::OutputModuleLibraryRule(std::ostream& fout,
   libName = this->ConvertToOutputPath(libName.c_str());
   command2 += libName + " \\\n";
   command2 += "\t  $(" + this->CreateMakeVariable(name, "_SRC_OBJS") + ") ";
-  std::strstream linklibs;
+  cmStringStream linklibs;
   this->OutputLinkLibraries(linklibs, std::string(name).c_str(), t);
-  linklibs << std::ends;
   command2 += linklibs.str();
-  delete [] linklibs.str();
   std::string customCommands = this->CreateTargetRules(t, name);
   const char* cc = 0;
   if(customCommands.size() > 0)
@@ -778,9 +774,8 @@ void cmUnixMakefileGenerator::OutputExecutableRule(std::ostream& fout,
       "$(CMAKE_C_COMPILER) $(CMAKE_C_SHLIB_LINK_FLAGS) $(CMAKE_C_FLAGS) ";
     }
   command += "$(" + this->CreateMakeVariable(name, "_SRC_OBJS") + ") ";
-  std::strstream linklibs;
+  cmStringStream linklibs;
   this->OutputLinkLibraries(linklibs, 0, t);
-  linklibs << std::ends;
   command += linklibs.str();
   std::string outputFile = m_ExecutableOutputPath + name;
   command += " -o " + this->ConvertToOutputPath(outputFile.c_str());

Source/cmVTKMakeInstantiatorCommand.cxx

@@ -216,10 +216,9 @@ cmVTKMakeInstantiatorCommand
 std::string
 cmVTKMakeInstantiatorCommand::GenerateCreationFileName(unsigned int block)
 {
-  std::strstream nameStr;
-  nameStr << m_ClassName.c_str() << block << ".cxx" << std::ends;
+  cmStringStream nameStr;
+  nameStr << m_ClassName.c_str() << block << ".cxx";
   std::string result = nameStr.str();
-  delete [] nameStr.str();
   return result;
 }
 

Source/cmake.cxx

@@ -43,7 +43,7 @@ cmake::cmake()
 
 void cmake::Usage(const char* program)
 {
-  std::strstream errorStream;
+  cmStringStream errorStream;
 
   errorStream << "cmake version " << cmMakefile::GetMajorVersion()
             << "." << cmMakefile::GetMinorVersion() << "\n";
@@ -61,9 +61,9 @@ void cmake::Usage(const char* program)
     {
     errorStream << "\"" << i->c_str() << "\" ";
     }
-	  errorStream << ")\n" << std::ends;
+	  errorStream << ")\n";
 
-  cmSystemTools::Error(errorStream.str());
+  cmSystemTools::Error(errorStream.str().c_str());
 }
 
 // Parse the args
@@ -519,7 +519,7 @@ int cmake::Generate(const std::vector<std::string>& args, bool buildMakefiles)
 
 void CMakeCommandUsage(const char* program)
 {
-  std::strstream errorStream;
+  cmStringStream errorStream;
 
   errorStream 
     << "cmake version " << cmMakefile::GetMajorVersion()
@@ -530,14 +530,14 @@ void CMakeCommandUsage(const char* program)
     << "Available commands: \n"
     << "  copy file destination   - copy file to destination (either file or directory)\n"
     << "  remove file1 file2 ...  - remove the file(s)\n"
-    << "  time command [args] ... - run command and return elapsed time\n"
+    << "  time command [args] ... - run command and return elapsed time\n";
 #if defined(_WIN32) && !defined(__CYGWIN__)
+  errorStream
     << "  write_regv key value    - write registry value\n"
-    << "  delete_regv key         - delete registry value\n"
+    << "  delete_regv key         - delete registry value\n";
 #endif
-    << std::ends;
 
-  cmSystemTools::Error(errorStream.str());
+  cmSystemTools::Error(errorStream.str().c_str());
 }
 
 int cmake::CMakeCommand(std::vector<std::string>& args)