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-rw-r--r--third-party/benchmark/src/commandlineflags.cc286
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diff --git a/third-party/benchmark/src/commandlineflags.cc b/third-party/benchmark/src/commandlineflags.cc
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--- a/third-party/benchmark/src/commandlineflags.cc
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-// Copyright 2015 Google Inc. All rights reserved.
-//
-// 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.
-
-#include "commandlineflags.h"
-
-#include <algorithm>
-#include <cctype>
-#include <cstdlib>
-#include <cstring>
-#include <iostream>
-#include <limits>
-#include <map>
-#include <utility>
-
-#include "../src/string_util.h"
-
-namespace benchmark {
-namespace {
-
-// Parses 'str' for a 32-bit signed integer. If successful, writes
-// the result to *value and returns true; otherwise leaves *value
-// unchanged and returns false.
-bool ParseInt32(const std::string& src_text, const char* str, int32_t* value) {
- // Parses the environment variable as a decimal integer.
- char* end = nullptr;
- const long long_value = strtol(str, &end, 10); // NOLINT
-
- // Has strtol() consumed all characters in the string?
- if (*end != '\0') {
- // No - an invalid character was encountered.
- std::cerr << src_text << " is expected to be a 32-bit integer, "
- << "but actually has value \"" << str << "\".\n";
- return false;
- }
-
- // Is the parsed value in the range of an Int32?
- const int32_t result = static_cast<int32_t>(long_value);
- if (long_value == std::numeric_limits<long>::max() ||
- long_value == std::numeric_limits<long>::min() ||
- // The parsed value overflows as a long. (strtol() returns
- // LONG_MAX or LONG_MIN when the input overflows.)
- result != long_value
- // The parsed value overflows as an Int32.
- ) {
- std::cerr << src_text << " is expected to be a 32-bit integer, "
- << "but actually has value \"" << str << "\", "
- << "which overflows.\n";
- return false;
- }
-
- *value = result;
- return true;
-}
-
-// Parses 'str' for a double. If successful, writes the result to *value and
-// returns true; otherwise leaves *value unchanged and returns false.
-bool ParseDouble(const std::string& src_text, const char* str, double* value) {
- // Parses the environment variable as a decimal integer.
- char* end = nullptr;
- const double double_value = strtod(str, &end); // NOLINT
-
- // Has strtol() consumed all characters in the string?
- if (*end != '\0') {
- // No - an invalid character was encountered.
- std::cerr << src_text << " is expected to be a double, "
- << "but actually has value \"" << str << "\".\n";
- return false;
- }
-
- *value = double_value;
- return true;
-}
-
-// Parses 'str' into KV pairs. If successful, writes the result to *value and
-// returns true; otherwise leaves *value unchanged and returns false.
-bool ParseKvPairs(const std::string& src_text, const char* str,
- std::map<std::string, std::string>* value) {
- std::map<std::string, std::string> kvs;
- for (const auto& kvpair : StrSplit(str, ',')) {
- const auto kv = StrSplit(kvpair, '=');
- if (kv.size() != 2) {
- std::cerr << src_text << " is expected to be a comma-separated list of "
- << "<key>=<value> strings, but actually has value \"" << str
- << "\".\n";
- return false;
- }
- if (!kvs.emplace(kv[0], kv[1]).second) {
- std::cerr << src_text << " is expected to contain unique keys but key \""
- << kv[0] << "\" was repeated.\n";
- return false;
- }
- }
-
- *value = kvs;
- return true;
-}
-
-// Returns the name of the environment variable corresponding to the
-// given flag. For example, FlagToEnvVar("foo") will return
-// "BENCHMARK_FOO" in the open-source version.
-static std::string FlagToEnvVar(const char* flag) {
- const std::string flag_str(flag);
-
- std::string env_var;
- for (size_t i = 0; i != flag_str.length(); ++i)
- env_var += static_cast<char>(::toupper(flag_str.c_str()[i]));
-
- return env_var;
-}
-
-} // namespace
-
-bool BoolFromEnv(const char* flag, bool default_val) {
- const std::string env_var = FlagToEnvVar(flag);
- const char* const value_str = getenv(env_var.c_str());
- return value_str == nullptr ? default_val : IsTruthyFlagValue(value_str);
-}
-
-int32_t Int32FromEnv(const char* flag, int32_t default_val) {
- const std::string env_var = FlagToEnvVar(flag);
- const char* const value_str = getenv(env_var.c_str());
- int32_t value = default_val;
- if (value_str == nullptr ||
- !ParseInt32(std::string("Environment variable ") + env_var, value_str,
- &value)) {
- return default_val;
- }
- return value;
-}
-
-double DoubleFromEnv(const char* flag, double default_val) {
- const std::string env_var = FlagToEnvVar(flag);
- const char* const value_str = getenv(env_var.c_str());
- double value = default_val;
- if (value_str == nullptr ||
- !ParseDouble(std::string("Environment variable ") + env_var, value_str,
- &value)) {
- return default_val;
- }
- return value;
-}
-
-const char* StringFromEnv(const char* flag, const char* default_val) {
- const std::string env_var = FlagToEnvVar(flag);
- const char* const value = getenv(env_var.c_str());
- return value == nullptr ? default_val : value;
-}
-
-std::map<std::string, std::string> KvPairsFromEnv(
- const char* flag, std::map<std::string, std::string> default_val) {
- const std::string env_var = FlagToEnvVar(flag);
- const char* const value_str = getenv(env_var.c_str());
-
- if (value_str == nullptr) return default_val;
-
- std::map<std::string, std::string> value;
- if (!ParseKvPairs("Environment variable " + env_var, value_str, &value)) {
- return default_val;
- }
- return value;
-}
-
-// Parses a string as a command line flag. The string should have
-// the format "--flag=value". When def_optional is true, the "=value"
-// part can be omitted.
-//
-// Returns the value of the flag, or nullptr if the parsing failed.
-const char* ParseFlagValue(const char* str, const char* flag,
- bool def_optional) {
- // str and flag must not be nullptr.
- if (str == nullptr || flag == nullptr) return nullptr;
-
- // The flag must start with "--".
- const std::string flag_str = std::string("--") + std::string(flag);
- const size_t flag_len = flag_str.length();
- if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
- // Skips the flag name.
- const char* flag_end = str + flag_len;
-
- // When def_optional is true, it's OK to not have a "=value" part.
- if (def_optional && (flag_end[0] == '\0')) return flag_end;
-
- // If def_optional is true and there are more characters after the
- // flag name, or if def_optional is false, there must be a '=' after
- // the flag name.
- if (flag_end[0] != '=') return nullptr;
-
- // Returns the string after "=".
- return flag_end + 1;
-}
-
-bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
- // Gets the value of the flag as a string.
- const char* const value_str = ParseFlagValue(str, flag, true);
-
- // Aborts if the parsing failed.
- if (value_str == nullptr) return false;
-
- // Converts the string value to a bool.
- *value = IsTruthyFlagValue(value_str);
- return true;
-}
-
-bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
- // Gets the value of the flag as a string.
- const char* const value_str = ParseFlagValue(str, flag, false);
-
- // Aborts if the parsing failed.
- if (value_str == nullptr) return false;
-
- // Sets *value to the value of the flag.
- return ParseInt32(std::string("The value of flag --") + flag, value_str,
- value);
-}
-
-bool ParseDoubleFlag(const char* str, const char* flag, double* value) {
- // Gets the value of the flag as a string.
- const char* const value_str = ParseFlagValue(str, flag, false);
-
- // Aborts if the parsing failed.
- if (value_str == nullptr) return false;
-
- // Sets *value to the value of the flag.
- return ParseDouble(std::string("The value of flag --") + flag, value_str,
- value);
-}
-
-bool ParseStringFlag(const char* str, const char* flag, std::string* value) {
- // Gets the value of the flag as a string.
- const char* const value_str = ParseFlagValue(str, flag, false);
-
- // Aborts if the parsing failed.
- if (value_str == nullptr) return false;
-
- *value = value_str;
- return true;
-}
-
-bool ParseKeyValueFlag(
- const char* str, const char* flag,
- std::map<std::string, std::string>* value) {
- const char* const value_str = ParseFlagValue(str, flag, false);
-
- if (value_str == nullptr) return false;
-
- for (const auto& kvpair : StrSplit(value_str, ',')) {
- const auto kv = StrSplit(kvpair, '=');
- if (kv.size() != 2) return false;
- value->emplace(kv[0], kv[1]);
- }
-
- return true;
-}
-
-bool IsFlag(const char* str, const char* flag) {
- return (ParseFlagValue(str, flag, true) != nullptr);
-}
-
-bool IsTruthyFlagValue(const std::string& value) {
- if (value.size() == 1) {
- char v = value[0];
- return isalnum(v) &&
- !(v == '0' || v == 'f' || v == 'F' || v == 'n' || v == 'N');
- } else if (!value.empty()) {
- std::string value_lower(value);
- std::transform(value_lower.begin(), value_lower.end(), value_lower.begin(),
- [](char c) { return static_cast<char>(::tolower(c)); });
- return !(value_lower == "false" || value_lower == "no" ||
- value_lower == "off");
- } else
- return true;
-}
-
-} // end namespace benchmark