[+] getopts

9 files changed, 77 insertions, 2741 deletions

diff --git a/.gitignore b/.gitignore
index 6756fcf..ea8c4bf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1 @@
-cmake-build-release
-cmake-build-debug
-.ccls-cache
-build
\ No newline at end of file
+/target
diff --git a/CMakeLists.txt b/CMakeLists.txt
deleted file mode 100644
index 655db6f..0000000
--- a/CMakeLists.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-cmake_minimum_required(VERSION 3.15)
-project(t)
-
-set(CMAKE_CXX_STANDARD 17)
-
-add_executable(t src/main.cpp src/opts/cxxopts.hpp src/functions.hpp)
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..2d96995
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,23 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "getopts"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14dbbfd5c71d70241ecf9e6f13737f7b5ce823821063188d7e46c41d371eebd5"
+dependencies = [
+ "unicode-width",
+]
+
+[[package]]
+name = "t"
+version = "0.1.0"
+dependencies = [
+ "getopts",
+]
+
+[[package]]
+name = "unicode-width"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caaa9d531767d1ff2150b9332433f32a24622147e5ebb1f26409d5da67afd479"
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..18f248d
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "t"
+version = "0.1.0"
+authors = ["Denis Evsyukov <[email protected]>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+getopts = "0.2"
\ No newline at end of file
diff --git a/src/functions.hpp b/src/functions.hpp
deleted file mode 100644
index 6b86197..0000000
--- a/src/functions.hpp
+++ /dev/null
@@ -1,35 +0,0 @@
-//
-// Created by d.evsyukov on 09.01.2020.
-//
-
-#ifndef T_FUNCTIONS_HPP
-#define T_FUNCTIONS_HPP
-
-#include "sha256/picosha2.h"
-#include <string>
-
-std::string &ltrim(std::string &str, const std::string &chars = "\t\n\v\f\r ") {
-  str.erase(0, str.find_first_not_of(chars));
-  return str;
-}
-
-std::string &rtrim(std::string &str, const std::string &chars = "\t\n\v\f\r ") {
-  str.erase(str.find_last_not_of(chars) + 1);
-  return str;
-}
-
-std::string &trim(std::string &str, const std::string &chars = "\t\n\v\f\r ") {
-  return ltrim(rtrim(str, chars), chars);
-}
-
-std::vector<std::string> split(const std::string &s, char delimiter) {
-  std::vector<std::string> tokens;
-  std::string token;
-  std::istringstream tokenStream(s);
-  while (std::getline(tokenStream, token, delimiter)) {
-    tokens.push_back(token);
-  }
-  return tokens;
-}
-
-#endif // T_FUNCTIONS_HPP
diff --git a/src/main.cpp b/src/main.cpp
deleted file mode 100644
index 010f3d3..0000000
--- a/src/main.cpp
+++ /dev/null
@@ -1,248 +0,0 @@
-#include <filesystem>
-#include <unordered_map>
-
-#include "functions.hpp"
-#include "opts/cxxopts.hpp"
-
-namespace fs = std::filesystem;
-
-std::unordered_map<std::string, std::string> tasks = {};
-std::unordered_map<std::string, std::string> tasksDone = {};
-std::unordered_map<std::string, std::string> prefixes = {};
-
-fs::path taskpath, donepath;
-std::string taskdir;
-std::string taskfile;
-bool deleteIfEmpthy;
-
-std::string sha256_hash(std::string text) {
-    std::vector<unsigned char> hash(picosha2::k_digest_size);
-    picosha2::hash256(text.begin(), text.end(), hash.begin(), hash.end());
-
-    std::string hex_str = picosha2::bytes_to_hex_string(hash.begin(), hash.end());
-    return hex_str;
-}
-
-std::string prefix(std::string hash) {
-    std::string prefix;
-    for (size_t i = 1; i <= hash.length(); i++) {
-        prefix = hash.substr(0, i);
-        if (prefixes.find(prefix) == prefixes.end())
-            return prefix;
-    }
-    return hash;
-}
-
-std::string getPrefixByHash(const std::string& hash) {
-    for (const auto &n : prefixes) {
-        if (n.second == hash)
-            return n.first;
-    }
-    return "";
-}
-
-void readFiles() {
-    // read task file
-    std::ifstream intaskfile(taskpath);
-
-    std::string line;
-    while (std::getline(intaskfile, line)) {
-        std::istringstream iss(line);
-        tasks[sha256_hash(line)] = line;
-    }
-    intaskfile.close();
-
-    // read done file
-    std::ifstream indonefile(donepath);
-
-    while (std::getline(indonefile, line)) {
-        std::istringstream iss(line);
-        tasksDone[sha256_hash(line)] = line;
-    }
-    indonefile.close();
-
-    for (const auto &n : tasks) {
-        prefixes[prefix(n.first)] = n.first;
-    }
-}
-
-void writeFiles() {
-    if (deleteIfEmpthy && (tasks.empty())) {
-        remove(taskpath);
-        remove(donepath);
-    } else {
-        std::ofstream outtaskfile(taskpath);
-        if (outtaskfile.is_open()) {
-            for (const auto &n : tasks) {
-                outtaskfile << n.second << std::endl;
-            }
-        }
-        outtaskfile.close();
-        std::ofstream outdonefile(donepath);
-        if (outdonefile.is_open()) {
-            for (const auto &n : tasksDone) {
-                outdonefile << n.second << std::endl;
-            }
-        }
-        outdonefile.close();
-    }
-}
-
-int main(int argc, char *argv[]) {
-    cxxopts::Options options(
-            "t", "t is for people that want do things, not organize their tasks.");
-    options.allow_unrecognised_options().add_options()(
-            "positional",
-            "Positional arguments: these are the arguments that are entered "
-            "without an option",
-            cxxopts::value<std::vector<std::string>>())(
-            "e,edit", "edit TASK to contain TEXT", cxxopts::value<std::string>())(
-            "f,finish", "mark TASK as finished", cxxopts::value<std::string>())(
-            "r,remove", "Remove TASK from list", cxxopts::value<std::string>())(
-            "l,list", "work on LIST",
-            cxxopts::value<std::string>()->default_value("tasks"))(
-            "t,taskdir", "work on the lists in DIR", cxxopts::value<std::string>())(
-            "d,delete-if-empty", "delete the task file if it becomes empty",
-            cxxopts::value<bool>()->default_value("false"))(
-            "g,grep", "print only tasks that contain WORD",
-            cxxopts::value<std::string>())(
-            "v,verbose", "print more detailed output (full task ids, etc)",
-            cxxopts::value<bool>()->default_value("false"))(
-            "q,quiet", "print less detailed output (no task ids, etc)",
-            cxxopts::value<bool>()->default_value("false"))(
-            "done", "list done tasks instead of unfinished ones",
-            cxxopts::value<bool>()->default_value("false"))("h,help", "HELP");
-    options.parse_positional({"positional"});
-    auto result = options.parse(argc, argv);
-    const auto &arguments = result.arguments();
-
-    if (result.count("help")) {
-        std::cout << options.help() << std::endl;
-        exit(0);
-    }
-
-    if (result.count("taskdir")) {
-        taskdir = result["taskdir"].as<std::string>();
-    } else {
-        namespace fs = std::filesystem;
-        taskdir = fs::current_path();
-    }
-
-    if (result.count("list")) {
-        taskfile = result["list"].as<std::string>();
-    } else {
-        taskfile = "tasks";
-    }
-
-    taskpath = fs::path(taskdir) / fs::path(taskfile);
-    donepath = fs::path(taskdir) / fs::path("." + taskfile + ".done");
-
-    if (!fs::exists(fs::path(taskdir))) {
-        std::cout << "Path is not exist: " << fs::path(taskdir) << std::endl;
-        exit(1);
-    }
-
-    if (result.count("delete-if-empty")) {
-        deleteIfEmpthy = true;
-    }
-
-    readFiles();
-
-    // edit task
-    if (result.count("edit")) {
-        auto task_prefix = result["edit"].as<std::string>();
-        auto task_hash = prefixes[task_prefix];
-        if (tasks.find(task_hash) != tasks.end()) {
-            std::string str;
-            auto &v = result["positional"].as<std::vector<std::string>>();
-            for (const auto &s : v) {
-                str += s + " ";
-            }
-            auto src_str = trim(str);
-            if (src_str.length() > 0) {
-                tasks[sha256_hash(src_str)] = src_str;
-                tasks.erase(task_hash);
-                writeFiles();
-            }
-        } else {
-            std::cout << "Task not found: " << task_prefix << std::endl;
-        }
-        exit(0);
-    }
-
-    // finish task
-    if (result.count("finish")) {
-        auto task_prefix = result["finish"].as<std::string>();
-        for (const auto &el : split(task_prefix, ',')) {
-            auto task_hash = prefixes[el];
-            if (tasks.find(task_hash) != tasks.end()) {
-                tasksDone[task_hash] = tasks[task_hash];
-                tasks.erase(task_hash);
-            } else {
-                std::cout << "Task not found: " << el << std::endl;
-            }
-        }
-        writeFiles();
-        exit(0);
-    }
-
-    // remove task
-    if (result.count("remove")) {
-        auto task_prefix = result["remove"].as<std::string>();
-        for (const auto &el : split(task_prefix, ',')) {
-            auto task_hash = prefixes[el];
-            if (tasks.find(task_hash) != tasks.end()) {
-                tasks.erase(task_hash);
-            } else {
-                std::cout << "Task not found: " << el << std::endl;
-            }
-        }
-        writeFiles();
-        exit(0);
-    }
-
-    // add new task
-    if (result.count("positional")) {
-        std::string str;
-        auto &v = result["positional"].as<std::vector<std::string>>();
-        for (const auto &s : v) {
-            str += s + " ";
-        }
-        auto src_str = trim(str);
-        tasks[sha256_hash(src_str)] = src_str;
-        std::string hash = sha256_hash(src_str);
-        std::string p = prefix(hash);
-
-        writeFiles();
-        exit(0);
-    }
-
-    // print tasks
-    if (result.count("done")) {
-        for (const auto &n : tasksDone) {
-            std::cout << n.second << std::endl;
-        }
-        exit(0);
-    }
-
-    std::string word;
-    if (result.count("grep")) {
-        word = result["grep"].as<std::string>();
-    } else {
-        word = "";
-    }
-
-    for (const auto &n : tasks) {
-        if (n.second.find(word) != std::string::npos) {
-            if (result.count("quiet")) {
-                std::cout << n.second << std::endl;
-            } else if (result.count("verbose")) {
-                std::cout << n.first << " - " << n.second << std::endl;
-            } else {
-                std::cout << getPrefixByHash(n.first) << " - " << n.second << std::endl;
-            }
-        }
-    }
-
-    return 0;
-}
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..88027c7
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,43 @@
+extern crate getopts;
+
+use getopts::*;
+use std::env;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let mut opts = Options::new();
+    opts.optflag("h", "help", "Show this help screen");
+    opts.optflag("", "done", "list done tasks instead of unfinished ones");
+    opts.optopt("e", "edit", "edit TASK to contain TEXT", "TASK");
+    opts.optopt("f", "finish", "mark TASK as finished", "TASK");
+    opts.optopt("r", "remove", "Remove TASK from list", "TASK");
+    opts.optopt("l", "list", "work on LIST", "LIST");
+    opts.optopt("t", "taskdir", "work on the lists in DIR", "DIR");
+    opts.optflag(
+        "d",
+        "delete-if-empty",
+        "delete the task file if it becomes empty",
+    );
+    opts.optopt("g", "grep", "print only tasks that contain WORD", "WORD");
+    opts.optflag(
+        "v",
+        "verbose",
+        "print more detailed output (full task ids, etc)",
+    );
+    opts.optflag(
+        "q",
+        "quiet",
+        "print less detailed output (no task ids, etc)",
+    );
+
+    let matches = match opts.parse(&args[1..]) {
+        Ok(m) => m,
+        Err(f) => panic!(f.to_string()),
+    };
+
+    if matches.opt_present("h") {
+        let brief = "t is for people that want do things, not organize their tasks";
+        opts.usage(&brief);
+        return;
+    }
+}
diff --git a/src/opts/cxxopts.hpp b/src/opts/cxxopts.hpp
deleted file mode 100644
index 99e0aab..0000000
--- a/src/opts/cxxopts.hpp
+++ /dev/null
@@ -1,2072 +0,0 @@
-/*
-
-Copyright (c) 2014, 2015, 2016, 2017 Jarryd Beck
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-
-*/
-
-#ifndef CXXOPTS_HPP_INCLUDED
-#define CXXOPTS_HPP_INCLUDED
-
-#include <cstring>
-#include <cctype>
-#include <exception>
-#include <iostream>
-#include <limits>
-#include <map>
-#include <memory>
-#include <regex>
-#include <sstream>
-#include <string>
-#include <unordered_map>
-#include <unordered_set>
-#include <vector>
-
-#ifdef __cpp_lib_optional
-#include <optional>
-#define CXXOPTS_HAS_OPTIONAL
-#endif
-
-#ifndef CXXOPTS_VECTOR_DELIMITER
-#define CXXOPTS_VECTOR_DELIMITER ','
-#endif
-
-#define CXXOPTS__VERSION_MAJOR 2
-#define CXXOPTS__VERSION_MINOR 2
-#define CXXOPTS__VERSION_PATCH 0
-
-namespace cxxopts
-{
-static constexpr struct
-{
-    uint8_t major, minor, patch;
-} version = {
-    CXXOPTS__VERSION_MAJOR,
-    CXXOPTS__VERSION_MINOR,
-    CXXOPTS__VERSION_PATCH};
-} // namespace cxxopts
-
-//when we ask cxxopts to use Unicode, help strings are processed using ICU,
-//which results in the correct lengths being computed for strings when they
-//are formatted for the help output
-//it is necessary to make sure that <unicode/unistr.h> can be found by the
-//compiler, and that icu-uc is linked in to the binary.
-
-#ifdef CXXOPTS_USE_UNICODE
-#include <unicode/unistr.h>
-
-namespace cxxopts
-{
-typedef icu::UnicodeString String;
-
-inline String
-toLocalString(std::string s)
-{
-    return icu::UnicodeString::fromUTF8(std::move(s));
-}
-
-class UnicodeStringIterator : public std::iterator<std::forward_iterator_tag, int32_t>
-{
-public:
-    UnicodeStringIterator(const icu::UnicodeString *string, int32_t pos)
-        : s(string), i(pos)
-    {
-    }
-
-    value_type
-    operator*() const
-    {
-        return s->char32At(i);
-    }
-
-    bool
-    operator==(const UnicodeStringIterator &rhs) const
-    {
-        return s == rhs.s && i == rhs.i;
-    }
-
-    bool
-    operator!=(const UnicodeStringIterator &rhs) const
-    {
-        return !(*this == rhs);
-    }
-
-    UnicodeStringIterator &
-    operator++()
-    {
-        ++i;
-        return *this;
-    }
-
-    UnicodeStringIterator
-    operator+(int32_t v)
-    {
-        return UnicodeStringIterator(s, i + v);
-    }
-
-private:
-    const icu::UnicodeString *s;
-    int32_t i;
-};
-
-inline String &
-stringAppend(String &s, String a)
-{
-    return s.append(std::move(a));
-}
-
-inline String &
-stringAppend(String &s, int n, UChar32 c)
-{
-    for (int i = 0; i != n; ++i)
-    {
-        s.append(c);
-    }
-
-    return s;
-}
-
-template <typename Iterator>
-String &
-stringAppend(String &s, Iterator begin, Iterator end)
-{
-    while (begin != end)
-    {
-        s.append(*begin);
-        ++begin;
-    }
-
-    return s;
-}
-
-inline size_t
-stringLength(const String &s)
-{
-    return s.length();
-}
-
-inline std::string
-toUTF8String(const String &s)
-{
-    std::string result;
-    s.toUTF8String(result);
-
-    return result;
-}
-
-inline bool
-empty(const String &s)
-{
-    return s.isEmpty();
-}
-} // namespace cxxopts
-
-namespace std
-{
-inline cxxopts::UnicodeStringIterator
-begin(const icu::UnicodeString &s)
-{
-    return cxxopts::UnicodeStringIterator(&s, 0);
-}
-
-inline cxxopts::UnicodeStringIterator
-end(const icu::UnicodeString &s)
-{
-    return cxxopts::UnicodeStringIterator(&s, s.length());
-}
-} // namespace std
-
-//ifdef CXXOPTS_USE_UNICODE
-#else
-
-namespace cxxopts
-{
-typedef std::string String;
-
-template <typename T>
-T toLocalString(T &&t)
-{
-    return std::forward<T>(t);
-}
-
-inline size_t
-stringLength(const String &s)
-{
-    return s.length();
-}
-
-inline String &
-stringAppend(String &s, String a)
-{
-    return s.append(std::move(a));
-}
-
-inline String &
-stringAppend(String &s, size_t n, char c)
-{
-    return s.append(n, c);
-}
-
-template <typename Iterator>
-String &
-stringAppend(String &s, Iterator begin, Iterator end)
-{
-    return s.append(begin, end);
-}
-
-template <typename T>
-std::string
-toUTF8String(T &&t)
-{
-    return std::forward<T>(t);
-}
-
-inline bool
-empty(const std::string &s)
-{
-    return s.empty();
-}
-} // namespace cxxopts
-
-//ifdef CXXOPTS_USE_UNICODE
-#endif
-
-namespace cxxopts
-{
-namespace
-{
-#ifdef _WIN32
-const std::string LQUOTE("\'");
-const std::string RQUOTE("\'");
-#else
-const std::string LQUOTE("‘");
-const std::string RQUOTE("’");
-#endif
-} // namespace
-
-class Value : public std::enable_shared_from_this<Value>
-{
-public:
-    virtual ~Value() = default;
-
-    virtual std::shared_ptr<Value>
-    clone() const = 0;
-
-    virtual void
-    parse(const std::string &text) const = 0;
-
-    virtual void
-    parse() const = 0;
-
-    virtual bool
-    has_default() const = 0;
-
-    virtual bool
-    is_container() const = 0;
-
-    virtual bool
-    has_implicit() const = 0;
-
-    virtual std::string
-    get_default_value() const = 0;
-
-    virtual std::string
-    get_implicit_value() const = 0;
-
-    virtual std::shared_ptr<Value>
-    default_value(const std::string &value) = 0;
-
-    virtual std::shared_ptr<Value>
-    implicit_value(const std::string &value) = 0;
-
-    virtual std::shared_ptr<Value>
-    no_implicit_value() = 0;
-
-    virtual bool
-    is_boolean() const = 0;
-};
-
-class OptionException : public std::exception
-{
-public:
-    OptionException(const std::string &message)
-        : m_message(message)
-    {
-    }
-
-    virtual const char *
-    what() const noexcept
-    {
-        return m_message.c_str();
-    }
-
-private:
-    std::string m_message;
-};
-
-class OptionSpecException : public OptionException
-{
-public:
-    OptionSpecException(const std::string &message)
-        : OptionException(message)
-    {
-    }
-};
-
-class OptionParseException : public OptionException
-{
-public:
-    OptionParseException(const std::string &message)
-        : OptionException(message)
-    {
-    }
-};
-
-class option_exists_error : public OptionSpecException
-{
-public:
-    option_exists_error(const std::string &option)
-        : OptionSpecException("Option " + LQUOTE + option + RQUOTE + " already exists")
-    {
-    }
-};
-
-class invalid_option_format_error : public OptionSpecException
-{
-public:
-    invalid_option_format_error(const std::string &format)
-        : OptionSpecException("Invalid option format " + LQUOTE + format + RQUOTE)
-    {
-    }
-};
-
-class option_syntax_exception : public OptionParseException
-{
-public:
-    option_syntax_exception(const std::string &text)
-        : OptionParseException("Argument " + LQUOTE + text + RQUOTE +
-                               " starts with a - but has incorrect syntax")
-    {
-    }
-};
-
-class option_not_exists_exception : public OptionParseException
-{
-public:
-    option_not_exists_exception(const std::string &option)
-        : OptionParseException("Option " + LQUOTE + option + RQUOTE + " does not exist")
-    {
-    }
-};
-
-class missing_argument_exception : public OptionParseException
-{
-public:
-    missing_argument_exception(const std::string &option)
-        : OptionParseException(
-              "Option " + LQUOTE + option + RQUOTE + " is missing an argument")
-    {
-    }
-};
-
-class option_requires_argument_exception : public OptionParseException
-{
-public:
-    option_requires_argument_exception(const std::string &option)
-        : OptionParseException(
-              "Option " + LQUOTE + option + RQUOTE + " requires an argument")
-    {
-    }
-};
-
-class option_not_has_argument_exception : public OptionParseException
-{
-public:
-    option_not_has_argument_exception(
-        const std::string &option,
-        const std::string &arg)
-        : OptionParseException(
-              "Option " + LQUOTE + option + RQUOTE +
-              " does not take an argument, but argument " +
-              LQUOTE + arg + RQUOTE + " given")
-    {
-    }
-};
-
-class option_not_present_exception : public OptionParseException
-{
-public:
-    option_not_present_exception(const std::string &option)
-        : OptionParseException("Option " + LQUOTE + option + RQUOTE + " not present")
-    {
-    }
-};
-
-class argument_incorrect_type : public OptionParseException
-{
-public:
-    argument_incorrect_type(
-        const std::string &arg)
-        : OptionParseException(
-              "Argument " + LQUOTE + arg + RQUOTE + " failed to parse")
-    {
-    }
-};
-
-class option_required_exception : public OptionParseException
-{
-public:
-    option_required_exception(const std::string &option)
-        : OptionParseException(
-              "Option " + LQUOTE + option + RQUOTE + " is required but not present")
-    {
-    }
-};
-
-template <typename T>
-void throw_or_mimic(const std::string &text)
-{
-    static_assert(std::is_base_of<std::exception, T>::value,
-                  "throw_or_mimic only works on std::exception and "
-                  "deriving classes");
-
-#ifndef CXXOPTS_NO_EXCEPTIONS
-    // If CXXOPTS_NO_EXCEPTIONS is not defined, just throw
-    throw T{text};
-#else
-    // Otherwise manually instantiate the exception, print what() to stderr,
-    // and abort
-    T exception{text};
-    std::cerr << exception.what() << std::endl;
-    std::cerr << "Aborting (exceptions disabled)..." << std::endl;
-    std::abort();
-#endif
-}
-
-namespace values
-{
-namespace
-{
-std::basic_regex<char> integer_pattern("(-)?(0x)?([0-9a-zA-Z]+)|((0x)?0)");
-std::basic_regex<char> truthy_pattern("(t|T)(rue)?|1");
-std::basic_regex<char> falsy_pattern("(f|F)(alse)?|0");
-} // namespace
-
-namespace detail
-{
-template <typename T, bool B>
-struct SignedCheck;
-
-template <typename T>
-struct SignedCheck<T, true>
-{
-    template <typename U>
-    void
-    operator()(bool negative, U u, const std::string &text)
-    {
-        if (negative)
-        {
-            if (u > static_cast<U>((std::numeric_limits<T>::min)()))
-            {
-                throw_or_mimic<argument_incorrect_type>(text);
-            }
-        }
-        else
-        {
-            if (u > static_cast<U>((std::numeric_limits<T>::max)()))
-            {
-                throw_or_mimic<argument_incorrect_type>(text);
-            }
-        }
-    }
-};
-
-template <typename T>
-struct SignedCheck<T, false>
-{
-    template <typename U>
-    void
-    operator()(bool, U, const std::string &) {}
-};
-
-template <typename T, typename U>
-void check_signed_range(bool negative, U value, const std::string &text)
-{
-    SignedCheck<T, std::numeric_limits<T>::is_signed>()(negative, value, text);
-}
-} // namespace detail
-
-template <typename R, typename T>
-R checked_negate(T &&t, const std::string &, std::true_type)
-{
-    // if we got to here, then `t` is a positive number that fits into
-    // `R`. So to avoid MSVC C4146, we first cast it to `R`.
-    // See https://github.com/jarro2783/cxxopts/issues/62 for more details.
-    return static_cast<R>(-static_cast<R>(t - 1) - 1);
-}
-
-template <typename R, typename T>
-T checked_negate(T &&t, const std::string &text, std::false_type)
-{
-    throw_or_mimic<argument_incorrect_type>(text);
-    return t;
-}
-
-template <typename T>
-void integer_parser(const std::string &text, T &value)
-{
-    std::smatch match;
-    std::regex_match(text, match, integer_pattern);
-
-    if (match.length() == 0)
-    {
-        throw_or_mimic<argument_incorrect_type>(text);
-    }
-
-    if (match.length(4) > 0)
-    {
-        value = 0;
-        return;
-    }
-
-    using US = typename std::make_unsigned<T>::type;
-
-    constexpr bool is_signed = std::numeric_limits<T>::is_signed;
-    const bool negative = match.length(1) > 0;
-    const uint8_t base = match.length(2) > 0 ? 16 : 10;
-
-    auto value_match = match[3];
-
-    US result = 0;
-
-    for (auto iter = value_match.first; iter != value_match.second; ++iter)
-    {
-        US digit = 0;
-
-        if (*iter >= '0' && *iter <= '9')
-        {
-            digit = static_cast<US>(*iter - '0');
-        }
-        else if (base == 16 && *iter >= 'a' && *iter <= 'f')
-        {
-            digit = static_cast<US>(*iter - 'a' + 10);
-        }
-        else if (base == 16 && *iter >= 'A' && *iter <= 'F')
-        {
-            digit = static_cast<US>(*iter - 'A' + 10);
-        }
-        else
-        {
-            throw_or_mimic<argument_incorrect_type>(text);
-        }
-
-        const US next = static_cast<US>(result * base + digit);
-        if (result > next)
-        {
-            throw_or_mimic<argument_incorrect_type>(text);
-        }
-
-        result = next;
-    }
-
-    detail::check_signed_range<T>(negative, result, text);
-
-    if (negative)
-    {
-        value = checked_negate<T>(result,
-                                  text,
-                                  std::integral_constant<bool, is_signed>());
-    }
-    else
-    {
-        value = static_cast<T>(result);
-    }
-}
-
-template <typename T>
-void stringstream_parser(const std::string &text, T &value)
-{
-    std::stringstream in(text);
-    in >> value;
-    if (!in)
-    {
-        throw_or_mimic<argument_incorrect_type>(text);
-    }
-}
-
-inline void
-parse_value(const std::string &text, uint8_t &value)
-{
-    integer_parser(text, value);
-}
-
-inline void
-parse_value(const std::string &text, int8_t &value)
-{
-    integer_parser(text, value);
-}
-
-inline void
-parse_value(const std::string &text, uint16_t &value)
-{
-    integer_parser(text, value);
-}
-
-inline void
-parse_value(const std::string &text, int16_t &value)
-{
-    integer_parser(text, value);
-}
-
-inline void
-parse_value(const std::string &text, uint32_t &value)
-{
-    integer_parser(text, value);
-}
-
-inline void
-parse_value(const std::string &text, int32_t &value)
-{
-    integer_parser(text, value);
-}
-
-inline void
-parse_value(const std::string &text, uint64_t &value)
-{
-    integer_parser(text, value);
-}
-
-inline void
-parse_value(const std::string &text, int64_t &value)
-{
-    integer_parser(text, value);
-}
-
-inline void
-parse_value(const std::string &text, bool &value)
-{
-    std::smatch result;
-    std::regex_match(text, result, truthy_pattern);
-
-    if (!result.empty())
-    {
-        value = true;
-        return;
-    }
-
-    std::regex_match(text, result, falsy_pattern);
-    if (!result.empty())
-    {
-        value = false;
-        return;
-    }
-
-    throw_or_mimic<argument_incorrect_type>(text);
-}
-
-inline void
-parse_value(const std::string &text, std::string &value)
-{
-    value = text;
-}
-
-// The fallback parser. It uses the stringstream parser to parse all types
-// that have not been overloaded explicitly.  It has to be placed in the
-// source code before all other more specialized templates.
-template <typename T>
-void parse_value(const std::string &text, T &value)
-{
-    stringstream_parser(text, value);
-}
-
-template <typename T>
-void parse_value(const std::string &text, std::vector<T> &value)
-{
-    std::stringstream in(text);
-    std::string token;
-    while (in.eof() == false && std::getline(in, token, CXXOPTS_VECTOR_DELIMITER))
-    {
-        T v;
-        parse_value(token, v);
-        value.emplace_back(std::move(v));
-    }
-}
-
-#ifdef CXXOPTS_HAS_OPTIONAL
-template <typename T>
-void parse_value(const std::string &text, std::optional<T> &value)
-{
-    T result;
-    parse_value(text, result);
-    value = std::move(result);
-}
-#endif
-
-inline void parse_value(const std::string &text, char &c)
-{
-    if (text.length() != 1)
-    {
-        throw_or_mimic<argument_incorrect_type>(text);
-    }
-
-    c = text[0];
-}
-
-template <typename T>
-struct type_is_container
-{
-    static constexpr bool value = false;
-};
-
-template <typename T>
-struct type_is_container<std::vector<T>>
-{
-    static constexpr bool value = true;
-};
-
-template <typename T>
-class abstract_value : public Value
-{
-    using Self = abstract_value<T>;
-
-public:
-    abstract_value()
-        : m_result(std::make_shared<T>()), m_store(m_result.get())
-    {
-    }
-
-    abstract_value(T *t)
-        : m_store(t)
-    {
-    }
-
-    virtual ~abstract_value() = default;
-
-    abstract_value(const abstract_value &rhs)
-    {
-        if (rhs.m_result)
-        {
-            m_result = std::make_shared<T>();
-            m_store = m_result.get();
-        }
-        else
-        {
-            m_store = rhs.m_store;
-        }
-
-        m_default = rhs.m_default;
-        m_implicit = rhs.m_implicit;
-        m_default_value = rhs.m_default_value;
-        m_implicit_value = rhs.m_implicit_value;
-    }
-
-    void
-    parse(const std::string &text) const
-    {
-        parse_value(text, *m_store);
-    }
-
-    bool
-    is_container() const
-    {
-        return type_is_container<T>::value;
-    }
-
-    void
-    parse() const
-    {
-        parse_value(m_default_value, *m_store);
-    }
-
-    bool
-    has_default() const
-    {
-        return m_default;
-    }
-
-    bool
-    has_implicit() const
-    {
-        return m_implicit;
-    }
-
-    std::shared_ptr<Value>
-    default_value(const std::string &value)
-    {
-        m_default = true;
-        m_default_value = value;
-        return shared_from_this();
-    }
-
-    std::shared_ptr<Value>
-    implicit_value(const std::string &value)
-    {
-        m_implicit = true;
-        m_implicit_value = value;
-        return shared_from_this();
-    }
-
-    std::shared_ptr<Value>
-    no_implicit_value()
-    {
-        m_implicit = false;
-        return shared_from_this();
-    }
-
-    std::string
-    get_default_value() const
-    {
-        return m_default_value;
-    }
-
-    std::string
-    get_implicit_value() const
-    {
-        return m_implicit_value;
-    }
-
-    bool
-    is_boolean() const
-    {
-        return std::is_same<T, bool>::value;
-    }
-
-    const T &
-    get() const
-    {
-        if (m_store == nullptr)
-        {
-            return *m_result;
-        }
-        else
-        {
-            return *m_store;
-        }
-    }
-
-protected:
-    std::shared_ptr<T> m_result;
-    T *m_store;
-
-    bool m_default = false;
-    bool m_implicit = false;
-
-    std::string m_default_value;
-    std::string m_implicit_value;
-};
-
-template <typename T>
-class standard_value : public abstract_value<T>
-{
-public:
-    using abstract_value<T>::abstract_value;
-
-    std::shared_ptr<Value>
-    clone() const
-    {
-        return std::make_shared<standard_value<T>>(*this);
-    }
-};
-
-template <>
-class standard_value<bool> : public abstract_value<bool>
-{
-public:
-    ~standard_value() = default;
-
-    standard_value()
-    {
-        set_default_and_implicit();
-    }
-
-    standard_value(bool *b)
-        : abstract_value(b)
-    {
-        set_default_and_implicit();
-    }
-
-    std::shared_ptr<Value>
-    clone() const
-    {
-        return std::make_shared<standard_value<bool>>(*this);
-    }
-
-private:
-    void
-    set_default_and_implicit()
-    {
-        m_default = true;
-        m_default_value = "false";
-        m_implicit = true;
-        m_implicit_value = "true";
-    }
-};
-} // namespace values
-
-template <typename T>
-std::shared_ptr<Value>
-value()
-{
-    return std::make_shared<values::standard_value<T>>();
-}
-
-template <typename T>
-std::shared_ptr<Value>
-value(T &t)
-{
-    return std::make_shared<values::standard_value<T>>(&t);
-}
-
-class OptionAdder;
-
-class OptionDetails
-{
-public:
-    OptionDetails(
-        const std::string &short_,
-        const std::string &long_,
-        const String &desc,
-        std::shared_ptr<const Value> val)
-        : m_short(short_), m_long(long_), m_desc(desc), m_value(val), m_count(0)
-    {
-    }
-
-    OptionDetails(const OptionDetails &rhs)
-        : m_desc(rhs.m_desc), m_count(rhs.m_count)
-    {
-        m_value = rhs.m_value->clone();
-    }
-
-    OptionDetails(OptionDetails &&rhs) = default;
-
-    const String &
-    description() const
-    {
-        return m_desc;
-    }
-
-    const Value &value() const
-    {
-        return *m_value;
-    }
-
-    std::shared_ptr<Value>
-    make_storage() const
-    {
-        return m_value->clone();
-    }
-
-    const std::string &
-    short_name() const
-    {
-        return m_short;
-    }
-
-    const std::string &
-    long_name() const
-    {
-        return m_long;
-    }
-
-private:
-    std::string m_short;
-    std::string m_long;
-    String m_desc;
-    std::shared_ptr<const Value> m_value;
-    int m_count;
-};
-
-struct HelpOptionDetails
-{
-    std::string s;
-    std::string l;
-    String desc;
-    bool has_default;
-    std::string default_value;
-    bool has_implicit;
-    std::string implicit_value;
-    std::string arg_help;
-    bool is_container;
-    bool is_boolean;
-};
-
-struct HelpGroupDetails
-{
-    std::string name;
-    std::string description;
-    std::vector<HelpOptionDetails> options;
-};
-
-class OptionValue
-{
-public:
-    void
-    parse(
-        std::shared_ptr<const OptionDetails> details,
-        const std::string &text)
-    {
-        ensure_value(details);
-        ++m_count;
-        m_value->parse(text);
-    }
-
-    void
-    parse_default(std::shared_ptr<const OptionDetails> details)
-    {
-        ensure_value(details);
-        m_default = true;
-        m_value->parse();
-    }
-
-    size_t
-    count() const noexcept
-    {
-        return m_count;
-    }
-
-    // TODO: maybe default options should count towards the number of arguments
-    bool
-    has_default() const noexcept
-    {
-        return m_default;
-    }
-
-    template <typename T>
-    const T &
-    as() const
-    {
-        if (m_value == nullptr)
-        {
-            throw_or_mimic<std::domain_error>("No value");
-        }
-
-#ifdef CXXOPTS_NO_RTTI
-        return static_cast<const values::standard_value<T> &>(*m_value).get();
-#else
-        return dynamic_cast<const values::standard_value<T> &>(*m_value).get();
-#endif
-    }
-
-private:
-    void
-    ensure_value(std::shared_ptr<const OptionDetails> details)
-    {
-        if (m_value == nullptr)
-        {
-            m_value = details->make_storage();
-        }
-    }
-
-    std::shared_ptr<Value> m_value;
-    size_t m_count = 0;
-    bool m_default = false;
-};
-
-class KeyValue
-{
-public:
-    KeyValue(std::string key_, std::string value_)
-        : m_key(std::move(key_)), m_value(std::move(value_))
-    {
-    }
-
-    const std::string &
-    key() const
-    {
-        return m_key;
-    }
-
-    const std::string &
-    value() const
-    {
-        return m_value;
-    }
-
-    template <typename T>
-    T as() const
-    {
-        T result;
-        values::parse_value(m_value, result);
-        return result;
-    }
-
-private:
-    std::string m_key;
-    std::string m_value;
-};
-
-class ParseResult
-{
-public:
-    ParseResult(
-        const std::shared_ptr<
-            std::unordered_map<std::string, std::shared_ptr<OptionDetails>>>,
-        std::vector<std::string>,
-        bool allow_unrecognised,
-        int &, char **&);
-
-    size_t
-    count(const std::string &o) const
-    {
-        auto iter = m_options->find(o);
-        if (iter == m_options->end())
-        {
-            return 0;
-        }
-
-        auto riter = m_results.find(iter->second);
-
-        return riter->second.count();
-    }
-
-    const OptionValue &
-    operator[](const std::string &option) const
-    {
-        auto iter = m_options->find(option);
-
-        if (iter == m_options->end())
-        {
-            throw_or_mimic<option_not_present_exception>(option);
-        }
-
-        auto riter = m_results.find(iter->second);
-
-        return riter->second;
-    }
-
-    const std::vector<KeyValue> &
-    arguments() const
-    {
-        return m_sequential;
-    }
-
-private:
-    void
-    parse(int &argc, char **&argv);
-
-    void
-    add_to_option(const std::string &option, const std::string &arg);
-
-    bool
-    consume_positional(std::string a);
-
-    void
-    parse_option(
-        std::shared_ptr<OptionDetails> value,
-        const std::string &name,
-        const std::string &arg = "");
-
-    void
-    parse_default(std::shared_ptr<OptionDetails> details);
-
-    void
-    checked_parse_arg(
-        int argc,
-        char *argv[],
-        int &current,
-        std::shared_ptr<OptionDetails> value,
-        const std::string &name);
-
-    const std::shared_ptr<
-        std::unordered_map<std::string, std::shared_ptr<OptionDetails>>>
-        m_options;
-    std::vector<std::string> m_positional;
-    std::vector<std::string>::iterator m_next_positional;
-    std::unordered_set<std::string> m_positional_set;
-    std::unordered_map<std::shared_ptr<OptionDetails>, OptionValue> m_results;
-
-    bool m_allow_unrecognised;
-
-    std::vector<KeyValue> m_sequential;
-};
-
-struct Option
-{
-    Option(
-        const std::string &opts,
-        const std::string &desc,
-        const std::shared_ptr<const Value> &value = ::cxxopts::value<bool>(),
-        const std::string &arg_help = "")
-        : opts_(opts), desc_(desc), value_(value), arg_help_(arg_help)
-    {
-    }
-
-    std::string opts_;
-    std::string desc_;
-    std::shared_ptr<const Value> value_;
-    std::string arg_help_;
-};
-
-class Options
-{
-    typedef std::unordered_map<std::string, std::shared_ptr<OptionDetails>>
-        OptionMap;
-
-public:
-    Options(std::string program, std::string help_string = "")
-        : m_program(std::move(program)), m_help_string(toLocalString(std::move(help_string))), m_custom_help("[OPTION...]"), m_positional_help("positional parameters"), m_show_positional(false), m_allow_unrecognised(false), m_options(std::make_shared<OptionMap>()), m_next_positional(m_positional.end())
-    {
-    }
-
-    Options &
-    positional_help(std::string help_text)
-    {
-        m_positional_help = std::move(help_text);
-        return *this;
-    }
-
-    Options &
-    custom_help(std::string help_text)
-    {
-        m_custom_help = std::move(help_text);
-        return *this;
-    }
-
-    Options &
-    show_positional_help()
-    {
-        m_show_positional = true;
-        return *this;
-    }
-
-    Options &
-    allow_unrecognised_options()
-    {
-        m_allow_unrecognised = true;
-        return *this;
-    }
-
-    ParseResult
-    parse(int &argc, char **&argv);
-
-    OptionAdder
-    add_options(std::string group = "");
-
-    void
-    add_options(
-        const std::string &group,
-        std::initializer_list<Option> options);
-
-    void
-    add_option(
-        const std::string &group,
-        const Option &option);
-
-    void
-    add_option(
-        const std::string &group,
-        const std::string &s,
-        const std::string &l,
-        std::string desc,
-        std::shared_ptr<const Value> value,
-        std::string arg_help);
-
-    //parse positional arguments into the given option
-    void
-    parse_positional(std::string option);
-
-    void
-    parse_positional(std::vector<std::string> options);
-
-    void
-    parse_positional(std::initializer_list<std::string> options);
-
-    template <typename Iterator>
-    void
-    parse_positional(Iterator begin, Iterator end)
-    {
-        parse_positional(std::vector<std::string>{begin, end});
-    }
-
-    std::string
-    help(const std::vector<std::string> &groups = {}) const;
-
-    const std::vector<std::string>
-    groups() const;
-
-    const HelpGroupDetails &
-    group_help(const std::string &group) const;
-
-private:
-    void
-    add_one_option(
-        const std::string &option,
-        std::shared_ptr<OptionDetails> details);
-
-    String
-    help_one_group(const std::string &group) const;
-
-    void
-    generate_group_help(
-        String &result,
-        const std::vector<std::string> &groups) const;
-
-    void
-    generate_all_groups_help(String &result) const;
-
-    std::string m_program;
-    String m_help_string;
-    std::string m_custom_help;
-    std::string m_positional_help;
-    bool m_show_positional;
-    bool m_allow_unrecognised;
-
-    std::shared_ptr<OptionMap> m_options;
-    std::vector<std::string> m_positional;
-    std::vector<std::string>::iterator m_next_positional;
-    std::unordered_set<std::string> m_positional_set;
-
-    //mapping from groups to help options
-    std::map<std::string, HelpGroupDetails> m_help;
-};
-
-class OptionAdder
-{
-public:
-    OptionAdder(Options &options, std::string group)
-        : m_options(options), m_group(std::move(group))
-    {
-    }
-
-    OptionAdder &
-    operator()(
-        const std::string &opts,
-        const std::string &desc,
-        std::shared_ptr<const Value> value = ::cxxopts::value<bool>(),
-        std::string arg_help = "");
-
-private:
-    Options &m_options;
-    std::string m_group;
-};
-
-namespace
-{
-constexpr int OPTION_LONGEST = 30;
-constexpr int OPTION_DESC_GAP = 2;
-
-std::basic_regex<char> option_matcher("--([[:alnum:]][-_[:alnum:]]+)(=(.*))?|-([[:alnum:]]+)");
-
-std::basic_regex<char> option_specifier("(([[:alnum:]]),)?[ ]*([[:alnum:]][-_[:alnum:]]*)?");
-
-String
-format_option(
-    const HelpOptionDetails &o)
-{
-    auto &s = o.s;
-    auto &l = o.l;
-
-    String result = "  ";
-
-    if (s.size() > 0)
-    {
-        result += "-" + toLocalString(s) + ",";
-    }
-    else
-    {
-        result += "   ";
-    }
-
-    if (l.size() > 0)
-    {
-        result += " --" + toLocalString(l);
-    }
-
-    auto arg = o.arg_help.size() > 0 ? toLocalString(o.arg_help) : "arg";
-
-    if (!o.is_boolean)
-    {
-        if (o.has_implicit)
-        {
-            result += " [=" + arg + "(=" + toLocalString(o.implicit_value) + ")]";
-        }
-        else
-        {
-            result += " " + arg;
-        }
-    }
-
-    return result;
-}
-
-String
-format_description(
-    const HelpOptionDetails &o,
-    size_t start,
-    size_t width)
-{
-    auto desc = o.desc;
-
-    if (o.has_default && (!o.is_boolean || o.default_value != "false"))
-    {
-        if (o.default_value != "")
-        {
-            desc += toLocalString(" (default: " + o.default_value + ")");
-        }
-        else
-        {
-            desc += toLocalString(" (default: \"\")");
-        }
-    }
-
-    String result;
-
-    auto current = std::begin(desc);
-    auto startLine = current;
-    auto lastSpace = current;
-
-    auto size = size_t{};
-
-    while (current != std::end(desc))
-    {
-        if (*current == ' ')
-        {
-            lastSpace = current;
-        }
-
-        if (*current == '\n')
-        {
-            startLine = current + 1;
-            lastSpace = startLine;
-        }
-        else if (size > width)
-        {
-            if (lastSpace == startLine)
-            {
-                stringAppend(result, startLine, current + 1);
-                stringAppend(result, "\n");
-                stringAppend(result, start, ' ');
-                startLine = current + 1;
-                lastSpace = startLine;
-            }
-            else
-            {
-                stringAppend(result, startLine, lastSpace);
-                stringAppend(result, "\n");
-                stringAppend(result, start, ' ');
-                startLine = lastSpace + 1;
-                lastSpace = startLine;
-            }
-            size = 0;
-        }
-        else
-        {
-            ++size;
-        }
-
-        ++current;
-    }
-
-    //append whatever is left
-    stringAppend(result, startLine, current);
-
-    return result;
-}
-} // namespace
-
-inline ParseResult::ParseResult(
-    const std::shared_ptr<
-        std::unordered_map<std::string, std::shared_ptr<OptionDetails>>>
-        options,
-    std::vector<std::string> positional,
-    bool allow_unrecognised,
-    int &argc, char **&argv)
-    : m_options(options), m_positional(std::move(positional)), m_next_positional(m_positional.begin()), m_allow_unrecognised(allow_unrecognised)
-{
-    parse(argc, argv);
-}
-
-inline void
-Options::add_options(
-    const std::string &group,
-    std::initializer_list<Option> options)
-{
-    OptionAdder option_adder(*this, group);
-    for (const auto &option : options)
-    {
-        option_adder(option.opts_, option.desc_, option.value_, option.arg_help_);
-    }
-}
-
-inline OptionAdder
-Options::add_options(std::string group)
-{
-    return OptionAdder(*this, std::move(group));
-}
-
-inline OptionAdder &
-OptionAdder::operator()(
-    const std::string &opts,
-    const std::string &desc,
-    std::shared_ptr<const Value> value,
-    std::string arg_help)
-{
-    std::match_results<const char *> result;
-    std::regex_match(opts.c_str(), result, option_specifier);
-
-    if (result.empty())
-    {
-        throw_or_mimic<invalid_option_format_error>(opts);
-    }
-
-    const auto &short_match = result[2];
-    const auto &long_match = result[3];
-
-    if (!short_match.length() && !long_match.length())
-    {
-        throw_or_mimic<invalid_option_format_error>(opts);
-    }
-    else if (long_match.length() == 1 && short_match.length())
-    {
-        throw_or_mimic<invalid_option_format_error>(opts);
-    }
-
-    auto option_names = [](
-                            const std::sub_match<const char *> &short_,
-                            const std::sub_match<const char *> &long_) {
-        if (long_.length() == 1)
-        {
-            return std::make_tuple(long_.str(), short_.str());
-        }
-        else
-        {
-            return std::make_tuple(short_.str(), long_.str());
-        }
-    }(short_match, long_match);
-
-    m_options.add_option(
-        m_group,
-        std::get<0>(option_names),
-        std::get<1>(option_names),
-        desc,
-        value,
-        std::move(arg_help));
-
-    return *this;
-}
-
-inline void
-ParseResult::parse_default(std::shared_ptr<OptionDetails> details)
-{
-    m_results[details].parse_default(details);
-}
-
-inline void
-ParseResult::parse_option(
-    std::shared_ptr<OptionDetails> value,
-    const std::string & /*name*/,
-    const std::string &arg)
-{
-    auto &result = m_results[value];
-    result.parse(value, arg);
-
-    m_sequential.emplace_back(value->long_name(), arg);
-}
-
-inline void
-ParseResult::checked_parse_arg(
-    int argc,
-    char *argv[],
-    int &current,
-    std::shared_ptr<OptionDetails> value,
-    const std::string &name)
-{
-    if (current + 1 >= argc)
-    {
-        if (value->value().has_implicit())
-        {
-            parse_option(value, name, value->value().get_implicit_value());
-        }
-        else
-        {
-            throw_or_mimic<missing_argument_exception>(name);
-        }
-    }
-    else
-    {
-        if (value->value().has_implicit())
-        {
-            parse_option(value, name, value->value().get_implicit_value());
-        }
-        else
-        {
-            parse_option(value, name, argv[current + 1]);
-            ++current;
-        }
-    }
-}
-
-inline void
-ParseResult::add_to_option(const std::string &option, const std::string &arg)
-{
-    auto iter = m_options->find(option);
-
-    if (iter == m_options->end())
-    {
-        throw_or_mimic<option_not_exists_exception>(option);
-    }
-
-    parse_option(iter->second, option, arg);
-}
-
-inline bool
-ParseResult::consume_positional(std::string a)
-{
-    while (m_next_positional != m_positional.end())
-    {
-        auto iter = m_options->find(*m_next_positional);
-        if (iter != m_options->end())
-        {
-            auto &result = m_results[iter->second];
-            if (!iter->second->value().is_container())
-            {
-                if (result.count() == 0)
-                {
-                    add_to_option(*m_next_positional, a);
-                    ++m_next_positional;
-                    return true;
-                }
-                else
-                {
-                    ++m_next_positional;
-                    continue;
-                }
-            }
-            else
-            {
-                add_to_option(*m_next_positional, a);
-                return true;
-            }
-        }
-        else
-        {
-            throw_or_mimic<option_not_exists_exception>(*m_next_positional);
-        }
-    }
-
-    return false;
-}
-
-inline void
-Options::parse_positional(std::string option)
-{
-    parse_positional(std::vector<std::string>{std::move(option)});
-}
-
-inline void
-Options::parse_positional(std::vector<std::string> options)
-{
-    m_positional = std::move(options);
-    m_next_positional = m_positional.begin();
-
-    m_positional_set.insert(m_positional.begin(), m_positional.end());
-}
-
-inline void
-Options::parse_positional(std::initializer_list<std::string> options)
-{
-    parse_positional(std::vector<std::string>(std::move(options)));
-}
-
-inline ParseResult
-Options::parse(int &argc, char **&argv)
-{
-    ParseResult result(m_options, m_positional, m_allow_unrecognised, argc, argv);
-    return result;
-}
-
-inline void
-ParseResult::parse(int &argc, char **&argv)
-{
-    int current = 1;
-
-    int nextKeep = 1;
-
-    bool consume_remaining = false;
-
-    while (current != argc)
-    {
-        if (strcmp(argv[current], "--") == 0)
-        {
-            consume_remaining = true;
-            ++current;
-            break;
-        }
-
-        std::match_results<const char *> result;
-        std::regex_match(argv[current], result, option_matcher);
-
-        if (result.empty())
-        {
-            //not a flag
-
-            // but if it starts with a `-`, then it's an error
-            if (argv[current][0] == '-' && argv[current][1] != '\0')
-            {
-                if (!m_allow_unrecognised)
-                {
-                    throw_or_mimic<option_syntax_exception>(argv[current]);
-                }
-            }
-
-            //if true is returned here then it was consumed, otherwise it is
-            //ignored
-            if (consume_positional(argv[current]))
-            {
-            }
-            else
-            {
-                argv[nextKeep] = argv[current];
-                ++nextKeep;
-            }
-            //if we return from here then it was parsed successfully, so continue
-        }
-        else
-        {
-            //short or long option?
-            if (result[4].length() != 0)
-            {
-                const std::string &s = result[4];
-
-                for (std::size_t i = 0; i != s.size(); ++i)
-                {
-                    std::string name(1, s[i]);
-                    auto iter = m_options->find(name);
-
-                    if (iter == m_options->end())
-                    {
-                        if (m_allow_unrecognised)
-                        {
-                            continue;
-                        }
-                        else
-                        {
-                            //error
-                            throw_or_mimic<option_not_exists_exception>(name);
-                        }
-                    }
-
-                    auto value = iter->second;
-
-                    if (i + 1 == s.size())
-                    {
-                        //it must be the last argument
-                        checked_parse_arg(argc, argv, current, value, name);
-                    }
-                    else if (value->value().has_implicit())
-                    {
-                        parse_option(value, name, value->value().get_implicit_value());
-                    }
-                    else
-                    {
-                        //error
-                        throw_or_mimic<option_requires_argument_exception>(name);
-                    }
-                }
-            }
-            else if (result[1].length() != 0)
-            {
-                const std::string &name = result[1];
-
-                auto iter = m_options->find(name);
-
-                if (iter == m_options->end())
-                {
-                    if (m_allow_unrecognised)
-                    {
-                        // keep unrecognised options in argument list, skip to next argument
-                        argv[nextKeep] = argv[current];
-                        ++nextKeep;
-                        ++current;
-                        continue;
-                    }
-                    else
-                    {
-                        //error
-                        throw_or_mimic<option_not_exists_exception>(name);
-                    }
-                }
-
-                auto opt = iter->second;
-
-                //equals provided for long option?
-                if (result[2].length() != 0)
-                {
-                    //parse the option given
-
-                    parse_option(opt, name, result[3]);
-                }
-                else
-                {
-                    //parse the next argument
-                    checked_parse_arg(argc, argv, current, opt, name);
-                }
-            }
-        }
-
-        ++current;
-    }
-
-    for (auto &opt : *m_options)
-    {
-        auto &detail = opt.second;
-        auto &value = detail->value();
-
-        auto &store = m_results[detail];
-
-        if (value.has_default() && !store.count() && !store.has_default())
-        {
-            parse_default(detail);
-        }
-    }
-
-    if (consume_remaining)
-    {
-        while (current < argc)
-        {
-            if (!consume_positional(argv[current]))
-            {
-                break;
-            }
-            ++current;
-        }
-
-        //adjust argv for any that couldn't be swallowed
-        while (current != argc)
-        {
-            argv[nextKeep] = argv[current];
-            ++nextKeep;
-            ++current;
-        }
-    }
-
-    argc = nextKeep;
-}
-
-inline void
-Options::add_option(
-    const std::string &group,
-    const Option &option)
-{
-    add_options(group, {option});
-}
-
-inline void
-Options::add_option(
-    const std::string &group,
-    const std::string &s,
-    const std::string &l,
-    std::string desc,
-    std::shared_ptr<const Value> value,
-    std::string arg_help)
-{
-    auto stringDesc = toLocalString(std::move(desc));
-    auto option = std::make_shared<OptionDetails>(s, l, stringDesc, value);
-
-    if (s.size() > 0)
-    {
-        add_one_option(s, option);
-    }
-
-    if (l.size() > 0)
-    {
-        add_one_option(l, option);
-    }
-
-    //add the help details
-    auto &options = m_help[group];
-
-    options.options.emplace_back(HelpOptionDetails{s, l, stringDesc,
-                                                   value->has_default(), value->get_default_value(),
-                                                   value->has_implicit(), value->get_implicit_value(),
-                                                   std::move(arg_help),
-                                                   value->is_container(),
-                                                   value->is_boolean()});
-}
-
-inline void
-Options::add_one_option(
-    const std::string &option,
-    std::shared_ptr<OptionDetails> details)
-{
-    auto in = m_options->emplace(option, details);
-
-    if (!in.second)
-    {
-        throw_or_mimic<option_exists_error>(option);
-    }
-}
-
-inline String
-Options::help_one_group(const std::string &g) const
-{
-    typedef std::vector<std::pair<String, String>> OptionHelp;
-
-    auto group = m_help.find(g);
-    if (group == m_help.end())
-    {
-        return "";
-    }
-
-    OptionHelp format;
-
-    size_t longest = 0;
-
-    String result;
-
-    if (!g.empty())
-    {
-        result += toLocalString(" " + g + " options:\n");
-    }
-
-    for (const auto &o : group->second.options)
-    {
-        if (m_positional_set.find(o.l) != m_positional_set.end() &&
-            !m_show_positional)
-        {
-            continue;
-        }
-
-        auto s = format_option(o);
-        longest = (std::max)(longest, stringLength(s));
-        format.push_back(std::make_pair(s, String()));
-    }
-
-    longest = (std::min)(longest, static_cast<size_t>(OPTION_LONGEST));
-
-    //widest allowed description
-    auto allowed = size_t{76} - longest - OPTION_DESC_GAP;
-
-    auto fiter = format.begin();
-    for (const auto &o : group->second.options)
-    {
-        if (m_positional_set.find(o.l) != m_positional_set.end() &&
-            !m_show_positional)
-        {
-            continue;
-        }
-
-        auto d = format_description(o, longest + OPTION_DESC_GAP, allowed);
-
-        result += fiter->first;
-        if (stringLength(fiter->first) > longest)
-        {
-            result += '\n';
-            result += toLocalString(std::string(longest + OPTION_DESC_GAP, ' '));
-        }
-        else
-        {
-            result += toLocalString(std::string(longest + OPTION_DESC_GAP -
-                                                    stringLength(fiter->first),
-                                                ' '));
-        }
-        result += d;
-        result += '\n';
-
-        ++fiter;
-    }
-
-    return result;
-}
-
-inline void
-Options::generate_group_help(
-    String &result,
-    const std::vector<std::string> &print_groups) const
-{
-    for (size_t i = 0; i != print_groups.size(); ++i)
-    {
-        const String &group_help_text = help_one_group(print_groups[i]);
-        if (empty(group_help_text))
-        {
-            continue;
-        }
-        result += group_help_text;
-        if (i < print_groups.size() - 1)
-        {
-            result += '\n';
-        }
-    }
-}
-
-inline void
-Options::generate_all_groups_help(String &result) const
-{
-    std::vector<std::string> all_groups;
-    all_groups.reserve(m_help.size());
-
-    for (auto &group : m_help)
-    {
-        all_groups.push_back(group.first);
-    }
-
-    generate_group_help(result, all_groups);
-}
-
-inline std::string
-Options::help(const std::vector<std::string> &help_groups) const
-{
-    String result = m_help_string + "\nUsage:\n  " +
-                    toLocalString(m_program) + " " + toLocalString(m_custom_help);
-
-    if (m_positional.size() > 0 && m_positional_help.size() > 0)
-    {
-        result += " " + toLocalString(m_positional_help);
-    }
-
-    result += "\n\n";
-
-    if (help_groups.size() == 0)
-    {
-        generate_all_groups_help(result);
-    }
-    else
-    {
-        generate_group_help(result, help_groups);
-    }
-
-    return toUTF8String(result);
-}
-
-inline const std::vector<std::string>
-Options::groups() const
-{
-    std::vector<std::string> g;
-
-    std::transform(
-        m_help.begin(),
-        m_help.end(),
-        std::back_inserter(g),
-        [](const std::map<std::string, HelpGroupDetails>::value_type &pair) {
-            return pair.first;
-        });
-
-    return g;
-}
-
-inline const HelpGroupDetails &
-Options::group_help(const std::string &group) const
-{
-    return m_help.at(group);
-}
-
-} // namespace cxxopts
-
-#endif //CXXOPTS_HPP_INCLUDED
\ No newline at end of file
diff --git a/src/sha256/picosha2.h b/src/sha256/picosha2.h
deleted file mode 100644
index 6bfe2d0..0000000
--- a/src/sha256/picosha2.h
+++ /dev/null
@@ -1,376 +0,0 @@
-/*
-The MIT License (MIT)
-
-Copyright (C) 2017 okdshin
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
-*/
-#ifndef PICOSHA2_H
-#define PICOSHA2_H
-// picosha2:20140213
-
-#ifndef PICOSHA2_BUFFER_SIZE_FOR_INPUT_ITERATOR
-#define PICOSHA2_BUFFER_SIZE_FOR_INPUT_ITERATOR                                \
-  1048576 //=1024*1024: default is 1MB memory
-#endif
-
-#include <algorithm>
-#include <cassert>
-#include <fstream>
-#include <iterator>
-#include <sstream>
-#include <vector>
-namespace picosha2 {
-typedef unsigned long word_t;
-typedef unsigned char byte_t;
-
-static const size_t k_digest_size = 32;
-
-namespace detail {
-inline byte_t mask_8bit(byte_t x) { return x & 0xff; }
-
-inline word_t mask_32bit(word_t x) { return x & 0xffffffff; }
-
-const word_t add_constant[64] = {
-    0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1,
-    0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
-    0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786,
-    0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
-    0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
-    0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
-    0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b,
-    0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
-    0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
-    0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
-    0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2};
-
-const word_t initial_message_digest[8] = {0x6a09e667, 0xbb67ae85, 0x3c6ef372,
-                                          0xa54ff53a, 0x510e527f, 0x9b05688c,
-                                          0x1f83d9ab, 0x5be0cd19};
-
-inline word_t ch(word_t x, word_t y, word_t z) { return (x & y) ^ ((~x) & z); }
-
-inline word_t maj(word_t x, word_t y, word_t z) {
-  return (x & y) ^ (x & z) ^ (y & z);
-}
-
-inline word_t rotr(word_t x, std::size_t n) {
-  assert(n < 32);
-  return mask_32bit((x >> n) | (x << (32 - n)));
-}
-
-inline word_t bsig0(word_t x) { return rotr(x, 2) ^ rotr(x, 13) ^ rotr(x, 22); }
-
-inline word_t bsig1(word_t x) { return rotr(x, 6) ^ rotr(x, 11) ^ rotr(x, 25); }
-
-inline word_t shr(word_t x, std::size_t n) {
-  assert(n < 32);
-  return x >> n;
-}
-
-inline word_t ssig0(word_t x) { return rotr(x, 7) ^ rotr(x, 18) ^ shr(x, 3); }
-
-inline word_t ssig1(word_t x) { return rotr(x, 17) ^ rotr(x, 19) ^ shr(x, 10); }
-
-template <typename RaIter1, typename RaIter2>
-void hash256_block(RaIter1 message_digest, RaIter2 first, RaIter2 last) {
-  assert(first + 64 == last);
-  static_cast<void>(last); // for avoiding unused-variable warning
-  word_t w[64];
-  std::fill(w, w + 64, 0);
-  for (std::size_t i = 0; i < 16; ++i) {
-    w[i] = (static_cast<word_t>(mask_8bit(*(first + i * 4))) << 24) |
-           (static_cast<word_t>(mask_8bit(*(first + i * 4 + 1))) << 16) |
-           (static_cast<word_t>(mask_8bit(*(first + i * 4 + 2))) << 8) |
-           (static_cast<word_t>(mask_8bit(*(first + i * 4 + 3))));
-  }
-  for (std::size_t i = 16; i < 64; ++i) {
-    w[i] =
-        mask_32bit(ssig1(w[i - 2]) + w[i - 7] + ssig0(w[i - 15]) + w[i - 16]);
-  }
-
-  word_t a = *message_digest;
-  word_t b = *(message_digest + 1);
-  word_t c = *(message_digest + 2);
-  word_t d = *(message_digest + 3);
-  word_t e = *(message_digest + 4);
-  word_t f = *(message_digest + 5);
-  word_t g = *(message_digest + 6);
-  word_t h = *(message_digest + 7);
-
-  for (std::size_t i = 0; i < 64; ++i) {
-    word_t temp1 = h + bsig1(e) + ch(e, f, g) + add_constant[i] + w[i];
-    word_t temp2 = bsig0(a) + maj(a, b, c);
-    h = g;
-    g = f;
-    f = e;
-    e = mask_32bit(d + temp1);
-    d = c;
-    c = b;
-    b = a;
-    a = mask_32bit(temp1 + temp2);
-  }
-  *message_digest += a;
-  *(message_digest + 1) += b;
-  *(message_digest + 2) += c;
-  *(message_digest + 3) += d;
-  *(message_digest + 4) += e;
-  *(message_digest + 5) += f;
-  *(message_digest + 6) += g;
-  *(message_digest + 7) += h;
-  for (std::size_t i = 0; i < 8; ++i) {
-    *(message_digest + i) = mask_32bit(*(message_digest + i));
-  }
-}
-
-} // namespace detail
-
-template <typename InIter>
-void output_hex(InIter first, InIter last, std::ostream &os) {
-  os.setf(std::ios::hex, std::ios::basefield);
-  while (first != last) {
-    os.width(2);
-    os.fill('0');
-    os << static_cast<unsigned int>(*first);
-    ++first;
-  }
-  os.setf(std::ios::dec, std::ios::basefield);
-}
-
-template <typename InIter>
-void bytes_to_hex_string(InIter first, InIter last, std::string &hex_str) {
-  std::ostringstream oss;
-  output_hex(first, last, oss);
-  hex_str.assign(oss.str());
-}
-
-template <typename InContainer>
-void bytes_to_hex_string(const InContainer &bytes, std::string &hex_str) {
-  bytes_to_hex_string(bytes.begin(), bytes.end(), hex_str);
-}
-
-template <typename InIter>
-std::string bytes_to_hex_string(InIter first, InIter last) {
-  std::string hex_str;
-  bytes_to_hex_string(first, last, hex_str);
-  return hex_str;
-}
-
-template <typename InContainer>
-std::string bytes_to_hex_string(const InContainer &bytes) {
-  std::string hex_str;
-  bytes_to_hex_string(bytes, hex_str);
-  return hex_str;
-}
-
-class hash256_one_by_one {
-public:
-  hash256_one_by_one() { init(); }
-
-  void init() {
-    buffer_.clear();
-    std::fill(data_length_digits_, data_length_digits_ + 4, 0);
-    std::copy(detail::initial_message_digest,
-              detail::initial_message_digest + 8, h_);
-  }
-
-  template <typename RaIter> void process(RaIter first, RaIter last) {
-    add_to_data_length(static_cast<word_t>(std::distance(first, last)));
-    std::copy(first, last, std::back_inserter(buffer_));
-    std::size_t i = 0;
-    for (; i + 64 <= buffer_.size(); i += 64) {
-      detail::hash256_block(h_, buffer_.begin() + i, buffer_.begin() + i + 64);
-    }
-    buffer_.erase(buffer_.begin(), buffer_.begin() + i);
-  }
-
-  void finish() {
-    byte_t temp[64];
-    std::fill(temp, temp + 64, 0);
-    std::size_t remains = buffer_.size();
-    std::copy(buffer_.begin(), buffer_.end(), temp);
-    temp[remains] = 0x80;
-
-    if (remains > 55) {
-      std::fill(temp + remains + 1, temp + 64, 0);
-      detail::hash256_block(h_, temp, temp + 64);
-      std::fill(temp, temp + 64 - 4, 0);
-    } else {
-      std::fill(temp + remains + 1, temp + 64 - 4, 0);
-    }
-
-    write_data_bit_length(&(temp[56]));
-    detail::hash256_block(h_, temp, temp + 64);
-  }
-
-  template <typename OutIter>
-  void get_hash_bytes(OutIter first, OutIter last) const {
-    for (const word_t *iter = h_; iter != h_ + 8; ++iter) {
-      for (std::size_t i = 0; i < 4 && first != last; ++i) {
-        *(first++) =
-            detail::mask_8bit(static_cast<byte_t>((*iter >> (24 - 8 * i))));
-      }
-    }
-  }
-
-private:
-  void add_to_data_length(word_t n) {
-    word_t carry = 0;
-    data_length_digits_[0] += n;
-    for (std::size_t i = 0; i < 4; ++i) {
-      data_length_digits_[i] += carry;
-      if (data_length_digits_[i] >= 65536u) {
-        carry = data_length_digits_[i] >> 16;
-        data_length_digits_[i] &= 65535u;
-      } else {
-        break;
-      }
-    }
-  }
-  void write_data_bit_length(byte_t *begin) {
-    word_t data_bit_length_digits[4];
-    std::copy(data_length_digits_, data_length_digits_ + 4,
-              data_bit_length_digits);
-
-    // convert byte length to bit length (multiply 8 or shift 3 times left)
-    word_t carry = 0;
-    for (std::size_t i = 0; i < 4; ++i) {
-      word_t before_val = data_bit_length_digits[i];
-      data_bit_length_digits[i] <<= 3;
-      data_bit_length_digits[i] |= carry;
-      data_bit_length_digits[i] &= 65535u;
-      carry = (before_val >> (16 - 3)) & 65535u;
-    }
-
-    // write data_bit_length
-    for (int i = 3; i >= 0; --i) {
-      (*begin++) = static_cast<byte_t>(data_bit_length_digits[i] >> 8);
-      (*begin++) = static_cast<byte_t>(data_bit_length_digits[i]);
-    }
-  }
-  std::vector<byte_t> buffer_;
-  word_t data_length_digits_[4]; // as 64bit integer (16bit x 4 integer)
-  word_t h_[8];
-};
-
-inline void get_hash_hex_string(const hash256_one_by_one &hasher,
-                                std::string &hex_str) {
-  byte_t hash[k_digest_size];
-  hasher.get_hash_bytes(hash, hash + k_digest_size);
-  return bytes_to_hex_string(hash, hash + k_digest_size, hex_str);
-}
-
-inline std::string get_hash_hex_string(const hash256_one_by_one &hasher) {
-  std::string hex_str;
-  get_hash_hex_string(hasher, hex_str);
-  return hex_str;
-}
-
-namespace impl {
-template <typename RaIter, typename OutIter>
-void hash256_impl(RaIter first, RaIter last, OutIter first2, OutIter last2, int,
-                  std::random_access_iterator_tag) {
-  hash256_one_by_one hasher;
-  // hasher.init();
-  hasher.process(first, last);
-  hasher.finish();
-  hasher.get_hash_bytes(first2, last2);
-}
-
-template <typename InputIter, typename OutIter>
-void hash256_impl(InputIter first, InputIter last, OutIter first2,
-                  OutIter last2, int buffer_size, std::input_iterator_tag) {
-  std::vector<byte_t> buffer(buffer_size);
-  hash256_one_by_one hasher;
-  // hasher.init();
-  while (first != last) {
-    int size = buffer_size;
-    for (int i = 0; i != buffer_size; ++i, ++first) {
-      if (first == last) {
-        size = i;
-        break;
-      }
-      buffer[i] = *first;
-    }
-    hasher.process(buffer.begin(), buffer.begin() + size);
-  }
-  hasher.finish();
-  hasher.get_hash_bytes(first2, last2);
-}
-} // namespace impl
-
-template <typename InIter, typename OutIter>
-void hash256(InIter first, InIter last, OutIter first2, OutIter last2,
-             int buffer_size = PICOSHA2_BUFFER_SIZE_FOR_INPUT_ITERATOR) {
-  picosha2::impl::hash256_impl(
-      first, last, first2, last2, buffer_size,
-      typename std::iterator_traits<InIter>::iterator_category());
-}
-
-template <typename InIter, typename OutContainer>
-void hash256(InIter first, InIter last, OutContainer &dst) {
-  hash256(first, last, dst.begin(), dst.end());
-}
-
-template <typename InContainer, typename OutIter>
-void hash256(const InContainer &src, OutIter first, OutIter last) {
-  hash256(src.begin(), src.end(), first, last);
-}
-
-template <typename InContainer, typename OutContainer>
-void hash256(const InContainer &src, OutContainer &dst) {
-  hash256(src.begin(), src.end(), dst.begin(), dst.end());
-}
-
-template <typename InIter>
-void hash256_hex_string(InIter first, InIter last, std::string &hex_str) {
-  byte_t hashed[k_digest_size];
-  hash256(first, last, hashed, hashed + k_digest_size);
-  std::ostringstream oss;
-  output_hex(hashed, hashed + k_digest_size, oss);
-  hex_str.assign(oss.str());
-}
-
-template <typename InIter>
-std::string hash256_hex_string(InIter first, InIter last) {
-  std::string hex_str;
-  hash256_hex_string(first, last, hex_str);
-  return hex_str;
-}
-
-inline void hash256_hex_string(const std::string &src, std::string &hex_str) {
-  hash256_hex_string(src.begin(), src.end(), hex_str);
-}
-
-template <typename InContainer>
-void hash256_hex_string(const InContainer &src, std::string &hex_str) {
-  hash256_hex_string(src.begin(), src.end(), hex_str);
-}
-
-template <typename InContainer>
-std::string hash256_hex_string(const InContainer &src) {
-  return hash256_hex_string(src.begin(), src.end());
-}
-template <typename OutIter>
-void hash256(std::ifstream &f, OutIter first, OutIter last) {
-  hash256(std::istreambuf_iterator<char>(f), std::istreambuf_iterator<char>(),
-          first, last);
-}
-} // namespace picosha2
-#endif // PICOSHA2_H
\ No newline at end of file