/src/logging-log4cxx/src/main/cpp/stringhelper.cpp

Source
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#define __STDC_CONSTANT_MACROS
#include <log4cxx/logstring.h>
#include <log4cxx/helpers/stringhelper.h>
#include <log4cxx/helpers/transcoder.h>
#include <algorithm>
#include <vector>
#include <iterator>
#include <algorithm>
#include <cctype>

using namespace LOG4CXX_NS;
using namespace LOG4CXX_NS::helpers;

bool StringHelper::equalsIgnoreCase(const LogString& s1, const logchar* upper, const logchar* lower)
{
  for (const auto& item : s1)
  {
    if (0 == item || // OSS-Fuzz makes strings with embedded NUL characters
      (item != *upper && item != *lower))
    {
      return false;
    }
    ++upper;
    ++lower;
  }

  return 0 == *upper;
}

bool StringHelper::equalsIgnoreCase(const LogString& s1, const LogString& upper, const LogString& lower)
{
  LogString::const_iterator u = upper.begin();
  LogString::const_iterator l = lower.begin();
  LogString::const_iterator iter = s1.begin();

  for (;
    iter != s1.end() && u != upper.end() && l != lower.end();
    iter++, u++, l++)
  {
    if (*iter != *u && *iter != *l)
    {
      return false;
    }
  }

  return u == upper.end() && iter == s1.end();
}



LogString StringHelper::toLowerCase(const LogString& s)
{
  // Fold ASCII A-Z only. Passing a value not representable as unsigned char
  // (or EOF) to std::tolower(int) is undefined behaviour; with signed char,
  // any byte > 0x7F sign-extends to a negative int. The previous implementation
  // also produced locale-dependent output for the same input, which is wrong
  // for the callers (class names, color names, column names — all ASCII).
  LogString d;
  d.reserve(s.size());
  for (auto ch : s)
  {
    if (ch >= static_cast<logchar>('A') && ch <= static_cast<logchar>('Z'))
      d.push_back(static_cast<logchar>(ch + ('a' - 'A')));
    else
      d.push_back(ch);
  }
  return d;
}

LogString StringHelper::trim(const LogString& s)
{
  LogString::size_type pos = s.find_first_not_of(' ');

  if (pos == std::string::npos)
  {
    return LogString();
  }

  LogString::size_type n = s.find_last_not_of(' ') - pos + 1;
  return s.substr(pos, n);
}

bool StringHelper::startsWith(const LogString& s, const LogString& prefix)
{
  if (s.length() < prefix.length())
  {
    return false;
  }

  return s.compare(0, prefix.length(), prefix) == 0;
}

bool StringHelper::endsWith(const LogString& s, const LogString& suffix)
{
  if (suffix.length() <= s.length())
  {
    return s.compare(s.length() - suffix.length(), suffix.length(), suffix) == 0;
  }

  return false;
}


int StringHelper::toInt(const LogString& s)
{
#if LOG4CXX_LOGCHAR_IS_UNICHAR
  std::string as;
  Transcoder::encode(s, as);
  return std::stoi(as);
#else
  return std::stoi(s);
#endif
}

int64_t StringHelper::toInt64(const LogString& s)
{
#if LOG4CXX_LOGCHAR_IS_UNICHAR
  std::string as;
  Transcoder::encode(s, as);
  return std::stoll(as);
#else
  return std::stoll(s);
#endif
}

void StringHelper::toString(int n, LogString& dst)
{
#if LOG4CXX_LOGCHAR_IS_WCHAR
  dst.append(std::to_wstring(n));
#elif LOG4CXX_LOGCHAR_IS_UTF8
  dst.append(std::to_string(n));
#else
  Transcoder::decode(std::to_string(n), dst);
#endif
}

void StringHelper::toString(bool val, LogString& dst)
{
  if (val)
  {
    dst.append(LOG4CXX_STR("true"));
  }
  else
  {
    dst.append(LOG4CXX_STR("false"));
  }
}


void StringHelper::toString(int64_t n, LogString& dst)
{
#if LOG4CXX_LOGCHAR_IS_WCHAR
  dst.append(std::to_wstring(n));
#elif LOG4CXX_LOGCHAR_IS_UTF8
  dst.append(std::to_string(n));
#else
  Transcoder::decode(std::to_string(n), dst);
#endif
}


void StringHelper::toString(size_t n, LogString& dst)
{
#if LOG4CXX_LOGCHAR_IS_WCHAR
  dst.append(std::to_wstring(n));
#elif LOG4CXX_LOGCHAR_IS_UTF8
  dst.append(std::to_string(n));
#else
  Transcoder::decode(std::to_string(n), dst);
#endif
}

LogString StringHelper::format(const LogString& pattern, const std::vector<LogString>& params)
{

  LogString result;
  LogString::size_type i = 0;

  while (i < pattern.length())
  {
    if (i + 2 < pattern.length() &&
      pattern[i] == 0x7B /* '{' */ && pattern[i + 1] >= 0x30 /* '0' */ &&
      pattern[i + 1] <= 0x39 /* '9' */ && pattern[i + 2] == 0x7D /* '}' */)
    {
      LogString::size_type arg = pattern[i + 1] - 0x30 /* '0' */;
      if (arg < params.size())
      {
        result = result + params[arg];
        i += 3;
        continue;
      }
    }
    result = result + pattern[i];
    i++;
  }

  return result;
}

#if LOG4CXX_ABI_VERSION <= 15
void StringHelper::toString(int n, Pool& pool, LogString& dst) { toString(n, dst); }
void StringHelper::toString(int64_t n, Pool& pool, LogString& dst) { toString(n, dst); }
void StringHelper::toString(size_t n, Pool& pool, LogString& dst) { toString(n, dst); }
#endif

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Created: 2026-06-10 06:58