RNTupleUtils.cxx

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/// \file RNTupleUtils.cxx
/// \author Jakob Blomer <jblomer@cern.ch> & Max Orok <maxwellorok@gmail.com>
/// \date 2020-07-14
/// \author Vincenzo Eduardo Padulano, CERN
/// \date 2024-11-08
 
/*************************************************************************
 * Copyright (C) 1995-2025, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#include <ROOT/RLogger.hxx>
#include <ROOT/RNTupleUtils.hxx>
 
#include <TError.h>
 
#include <algorithm>
#include <array>
#include <cctype>
#include <string>
#include <utility>
 
ROOT::RLogChannel &ROOT::Internal::NTupleLog()
{
   static RLogChannel sLog("ROOT.NTuple");
   return sLog;
}
 
ROOT::RResult<void> ROOT::Internal::EnsureValidNameForRNTuple(std::string_view name, std::string_view where)
{
   using codeAndRepr = std::pair<const char *, const char *>;
   constexpr static std::array<codeAndRepr, 4> forbiddenChars{codeAndRepr{"\u002E", "."}, codeAndRepr{"\u002F", "/"},
                                                              codeAndRepr{"\u0020", "space"},
                                                              codeAndRepr{"\u005C", "\\"}};
 
   for (auto &&[code, repr] : forbiddenChars) {
      if (name.find(code) != std::string_view::npos)
         return R__FAIL(std::string(where) + " name '" + std::string(name) + "' cannot contain character '" + repr +
                        "'.");
   }
 
   if (std::count_if(name.begin(), name.end(), [](unsigned char c) { return std::iscntrl(c); }))
      return R__FAIL(std::string(where) + " name '" + std::string(name) +
                     "' cannot contain character classified as control character. These notably include newline, tab, "
                     "carriage return.");
 
   return RResult<void>::Success();
}
 
const std::string *ROOT::Internal::RStringPool::Intern(std::string_view str)
{
   auto itr = std::lower_bound(fStrings.begin(), fStrings.end(), str, Less);
 
   if (itr == fStrings.end() || **itr != str) {
      R__ASSERT(!fFrozen);
      itr = fStrings.insert(itr, std::make_unique<std::string>(str));
   }
 
   return itr->get();
}