YugabyteDB (2.13.1.0-b60, 21121d69985fbf76aa6958d8f04a9bfa936293b5)

//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.

//  This source code is licensed under the BSD-style license found in the

//  LICENSE file in the root directory of this source tree. An additional grant

//  of patent rights can be found in the PATENTS file in the same directory.

//

// The following only applies to changes made to this file as part of YugaByte development.

//

// Portions Copyright (c) YugaByte, Inc.

//

// Licensed 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.

//

// Copyright (c) 2011 The LevelDB Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file. See the AUTHORS file for names of contributors.

#include "yb/rocksdb/util/logging.h"

#ifndef __STDC_FORMAT_MACROS

#define __STDC_FORMAT_MACROS

#endif

#include <inttypes.h>

#include <stdio.h>

#include "yb/util/slice.h"

namespace rocksdb {

// for micros < 10ms, print "XX us".

// for micros < 10sec, print "XX ms".

// for micros >= 10 sec, print "XX sec".

// for micros <= 1 hour, print Y:X M:S".

// for micros > 1 hour, print Z:Y:X H:M:S".

int AppendHumanMicros(uint64_t micros, char* output, int len,

                      bool fixed_format) {

  if (micros < 10000 && !fixed_format) {

    return snprintf(output, len, "%" PRIu64 " us", micros);

  } else if (micros < 10000000 && !fixed_format) {

    return snprintf(output, len, "%.3lf ms",

                    static_cast<double>(micros) / 1000);

  } else if (micros < 1000000l * 60 && !fixed_format) {

    return snprintf(output, len, "%.3lf sec",

                    static_cast<double>(micros) / 1000000);

  } else if (micros < 1000000ll * 60 * 60 && !fixed_format) {

    return snprintf(output, len, "%02" PRIu64 ":%05.3f M:S",

        micros / 1000000 / 60,

        static_cast<double>(micros % 60000000) / 1000000);

  } else {

    return snprintf(output, len,

        "%02" PRIu64 ":%02" PRIu64 ":%05.3f H:M:S",

        micros / 1000000 / 3600,

        (micros / 1000000 / 60) % 60,

        static_cast<double>(micros % 60000000) / 1000000);

  }

}

// for sizes >=10TB, print "XXTB"

// for sizes >=10GB, print "XXGB"

// etc.

// append file size summary to output and return the len

int AppendHumanBytes(uint64_t bytes, char* output, int len) {

  const uint64_t ull10 = 10;

  if (bytes >= ull10 << 40) {

    return snprintf(output, len, "%" PRIu64 "TB", bytes >> 40);

  } else if (bytes >= ull10 << 30) {

    return snprintf(output, len, "%" PRIu64 "GB", bytes >> 30);

  } else if (bytes >= ull10 << 20) {

    return snprintf(output, len, "%" PRIu64 "MB", bytes >> 20);

  } else if (bytes >= ull10 << 10) {

    return snprintf(output, len, "%" PRIu64 "KB", bytes >> 10);

  } else {

    return snprintf(output, len, "%" PRIu64 "B", bytes);

  }

}

void AppendNumberTo(std::string* str, uint64_t num) {

  char buf[30];

  snprintf(buf, sizeof(buf), "%" PRIu64, num);

  str->append(buf);

}

void AppendBoolTo(std::string* str, const bool b) {

  str->append(b ? "true" : "false");

}

void AppendEscapedStringTo(std::string* str, const Slice& value) {

  for (size_t i = 0; i < value.size(); 
i++10
) {

    char c = value[i];

    if (c >= ' ' && 
c <= '~'0
) {

      str->push_back(c);

    } else {

      char buf[10];

      snprintf(buf, sizeof(buf), "\\x%02x",

               static_cast<unsigned int>(c) & 0xff);

      str->append(buf);

    }

  }

}

std::string NumberToString(uint64_t num) {

  std::string r;

  AppendNumberTo(&r, num);

  return r;

}

std::string NumberToHumanString(int64_t num) {

  char buf[24];

  int64_t absnum = num < 0 ? 
-num0
 : num;

  if (absnum < 10000) {

    snprintf(buf, sizeof(buf), "%" PRIi64, num);

  } else 
if (0
absnum < 100000000
) {

    snprintf(buf, sizeof(buf), "%" PRIi64 "K", num / 1000);

  } else if (absnum < 10000000000LL) {

    snprintf(buf, sizeof(buf), "%" PRIi64 "M", num / 1000000);

  } else {

    snprintf(buf, sizeof(buf), "%" PRIi64 "G", num / 1000000000);

  }

  return std::string(buf);

}

std::string EscapeString(const Slice& value) {

  std::string r;

  AppendEscapedStringTo(&r, value);

  return r;

}

bool ConsumeDecimalNumber(Slice* in, uint64_t* val) {

  uint64_t v = 0;

  int digits = 0;

  while (!in->empty()) {

    char c = (*in)[0];

    if (c >= '0' && 
c <= '9'96.5M
) {

      ++digits;

      const unsigned int delta = (c - '0');

      static const uint64_t kMaxUint64 = ~static_cast<uint64_t>(0);

      if (v > kMaxUint64/10 ||

          (v == kMaxUint64/10 && 
delta > kMaxUint64%105
)) {

        // Overflow

        return false;

      }

      v = (v * 10) + delta;

      in->remove_prefix(1);

    } else {

      break;

    }

  }

  *val = v;

  return (digits > 0);

}

}  // namespace rocksdb