string.hxx

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/*
 * Copyright (C) 2024-2026 David C. Manuelda (StormBytePP)
 *
 * This file is part of StormByte-String.
 *
 * StormByte-String original source is dual-licensed:
 *
 * 1. GNU Lesser General Public License v3.0 (or later)
 *    You may redistribute and/or modify this file under the terms of the
 *    GNU Lesser General Public License as published by the Free Software
 *    Foundation, either version 3 of the License, or (at your option)
 *    any later version.
 *
 * 2. Commercial license
 *    Alternatively, this file may be used under the terms of a commercial
 *    license agreement with the copyright holder
 *    (David C. Manuelda <StormByte@gmail.com>).
 *
 * Both licenses apply only to original StormByte-String source in this
 * repository. They do not cover other StormByte modules or any third-party
 * material shipped with this repository (including everything under
 * thirdparty/, and in particular the bundled StormByte Base tree),
 * which remains under its own license.
 *
 * Neither license grants any patent rights. Any patent licenses required
 * to use this software or third-party components must be obtained separately
 * from the patent holders.
 *
 * StormByte-String is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with StormByte-String. If not, see
 * <https://www.gnu.org/licenses/lgpl-3.0.html>.
 *
 * SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-StormByte-Commercial
 */
 
#pragma once
 
#include <StormByte/cstring.hxx>
#include <StormByte/string/visibility.h>
 
#include <cctype>
#include <compare>
#include <cstddef>
#include <functional>
#include <iterator>
#include <ostream>
#include <queue>
#include <string>
#include <string_view>
#include <vector>
 
namespace StormByte {
    namespace String {
        class WString;
 
        class STORMBYTE_STRING_PUBLIC String {
            public:
                using value_type = char;    
                using const_iterator = const char*; 
                using const_reverse_iterator = std::reverse_iterator<const_iterator>;   
 
                String() noexcept;
 
                explicit String(const char* str) noexcept;
 
                explicit String(std::string_view str) noexcept;
 
                explicit String(CString text) noexcept;
 
                explicit String(const WString& other) noexcept;
 
                String(const String& other) noexcept;
 
                String(String&& other) noexcept;
 
                ~String() noexcept = default;
 
                String& operator=(const String& other) noexcept;
 
                String& operator=(String&& other) noexcept;
 
                inline const_iterator begin() const noexcept {
                    return data();
                }
 
                inline const_iterator end() const noexcept {
                    const char* text = data();
                    return text ? text + size() : nullptr;
                }
 
                inline const_iterator cbegin() const noexcept {
                    return begin();
                }
 
                inline const_iterator cend() const noexcept {
                    return end();
                }
 
                inline const_reverse_iterator rbegin() const noexcept {
                    return const_reverse_iterator(end());
                }
 
                inline const_reverse_iterator rend() const noexcept {
                    return const_reverse_iterator(begin());
                }
 
                inline const_reverse_iterator crbegin() const noexcept {
                    return rbegin();
                }
 
                inline const_reverse_iterator crend() const noexcept {
                    return rend();
                }
 
                inline const char* data() const noexcept {
                    return static_cast<const char*>(m_text);
                }
 
                inline Size size() const noexcept {
                    return m_text.Length();
                }
 
                inline Size length() const noexcept {
                    return size();
                }
 
                inline bool empty() const noexcept {
                    return size() == 0;
                }
 
                inline char operator[](const Size& index) const noexcept {
                    return m_text[index];
                }
 
                inline explicit operator bool() const noexcept {
                    return static_cast<bool>(m_text);
                }
 
                inline operator std::string_view() const noexcept {
                    return static_cast<std::string_view>(m_text);
                }
 
                STORMBYTE_FORCE_INLINE explicit operator std::string() const {
                    return static_cast<std::string>(m_text);
                }
 
                inline explicit operator const char*() const noexcept {
                    return static_cast<const char*>(m_text);
                }
 
                explicit operator WString() const noexcept;
 
                inline const CString& Bytes() const noexcept {
                    return m_text;
                }
 
                static constexpr Size npos{~0ull};  
 
                inline bool starts_with(std::string_view text) const noexcept {
                    return static_cast<std::string_view>(*this).starts_with(text);
                }
 
                inline bool starts_with(char ch) const noexcept {
                    return static_cast<std::string_view>(*this).starts_with(ch);
                }
 
                inline bool ends_with(std::string_view text) const noexcept {
                    return static_cast<std::string_view>(*this).ends_with(text);
                }
 
                inline bool ends_with(char ch) const noexcept {
                    return static_cast<std::string_view>(*this).ends_with(ch);
                }
 
                inline bool contains(std::string_view text) const noexcept {
                    return static_cast<std::string_view>(*this).contains(text);
                }
 
                inline bool contains(char ch) const noexcept {
                    return static_cast<std::string_view>(*this).contains(ch);
                }
 
                inline Size find(std::string_view text, Size pos = {}) const noexcept {
                    return FindAt(static_cast<std::string_view>(*this), text, pos);
                }
 
                inline Size find(char ch, Size pos = {}) const noexcept {
                    return FindAt(static_cast<std::string_view>(*this), ch, pos);
                }
 
                inline Size find(const char* text, Size pos, Size count) const noexcept {
                    return find(std::string_view(text, static_cast<std::size_t>(count)), pos);
                }
 
                inline Size rfind(std::string_view text, Size pos = npos) const noexcept {
                    return RFindAt(static_cast<std::string_view>(*this), text, pos);
                }
 
                inline Size rfind(char ch, Size pos = npos) const noexcept {
                    return RFindAt(static_cast<std::string_view>(*this), ch, pos);
                }
 
                inline Size rfind(const char* text, Size pos, Size count) const noexcept {
                    return rfind(std::string_view(text, static_cast<std::size_t>(count)), pos);
                }
 
                inline Size find_first_of(std::string_view text, Size pos = {}) const noexcept {
                    const std::string_view self = *this;
                    if (pos > Size{self.size()})
                        return npos;
                    return FromIndex(self.find_first_of(text, static_cast<std::size_t>(pos)));
                }
 
                inline Size find_first_of(char ch, Size pos = {}) const noexcept {
                    return find(ch, pos);
                }
 
                inline Size find_last_of(std::string_view text, Size pos = npos) const noexcept {
                    const std::string_view self = *this;
                    const std::size_t start = pos == npos ? std::string_view::npos : static_cast<std::size_t>(pos);
                    return FromIndex(self.find_last_of(text, start));
                }
 
                inline Size find_last_of(char ch, Size pos = npos) const noexcept {
                    return rfind(ch, pos);
                }
 
                inline Size find_first_not_of(std::string_view text, Size pos = {}) const noexcept {
                    const std::string_view self = *this;
                    if (pos > Size{self.size()})
                        return npos;
                    return FromIndex(self.find_first_not_of(text, static_cast<std::size_t>(pos)));
                }
 
                inline Size find_first_not_of(char ch, Size pos = {}) const noexcept {
                    const std::string_view self = *this;
                    if (pos > Size{self.size()})
                        return npos;
                    return FromIndex(self.find_first_not_of(ch, static_cast<std::size_t>(pos)));
                }
 
                inline Size find_last_not_of(std::string_view text, Size pos = npos) const noexcept {
                    const std::string_view self = *this;
                    const std::size_t start = pos == npos ? std::string_view::npos : static_cast<std::size_t>(pos);
                    return FromIndex(self.find_last_not_of(text, start));
                }
 
                inline Size find_last_not_of(char ch, Size pos = npos) const noexcept {
                    const std::string_view self = *this;
                    const std::size_t start = pos == npos ? std::string_view::npos : static_cast<std::size_t>(pos);
                    return FromIndex(self.find_last_not_of(ch, start));
                }
 
                inline String substr(Size pos = {}, Size count = npos) const noexcept {
                    const std::string_view text = *this;
                    if (pos > Size{text.size()})
                        return String();
                    const std::size_t n = count == npos ? std::string_view::npos : static_cast<std::size_t>(count);
                    return String(text.substr(static_cast<std::size_t>(pos), n));
                }
 
                inline int compare(std::string_view text) const noexcept {
                    return static_cast<std::string_view>(*this).compare(text);
                }
 
                inline char front() const noexcept {
                    return (*this)[Size{0}];
                }
 
                inline char back() const noexcept {
                    return (*this)[size() - Size{1}];
                }
 
                static String ToLower(std::string_view str) noexcept;
 
                static String ToUpper(std::string_view str) noexcept;
 
                static String SanitizeNewlines(std::string_view str) noexcept;
 
                static String RemoveWhitespace(std::string_view str) noexcept;
 
                static bool IsInteger(std::string_view str) noexcept;
 
                static STORMBYTE_FORCE_INLINE void Split(std::string_view str, std::vector<String>& out) noexcept {
                    out.clear();
                    std::size_t i = 0;
                    while (i < str.size()) {
                        while (i < str.size() && std::isspace(static_cast<unsigned char>(str[i])) != 0)
                            ++i;
                        if (i >= str.size())
                            break;
                        std::size_t j = i;
                        while (j < str.size() && std::isspace(static_cast<unsigned char>(str[j])) == 0)
                            ++j;
                        out.emplace_back(str.substr(i, j - i));
                        i = j;
                    }
                }
 
                static STORMBYTE_FORCE_INLINE void Explode(std::string_view str, char delimiter, std::queue<String>& out) noexcept {
                    while (!out.empty())
                        out.pop();
                    std::size_t start = 0;
                    for (std::size_t i = 0; i <= str.size(); ++i) {
                        if (i == str.size() || str[i] == delimiter) {
                            out.emplace(str.substr(start, i - start));
                            start = i + 1;
                        }
                    }
                }
 
                inline String ToLower() const noexcept {
                    return ToLower(static_cast<std::string_view>(*this));
                }
 
                inline String ToUpper() const noexcept {
                    return ToUpper(static_cast<std::string_view>(*this));
                }
 
                inline String SanitizeNewlines() const noexcept {
                    return SanitizeNewlines(static_cast<std::string_view>(*this));
                }
 
                inline String RemoveWhitespace() const noexcept {
                    return RemoveWhitespace(static_cast<std::string_view>(*this));
                }
 
                inline bool IsInteger() const noexcept {
                    return IsInteger(static_cast<std::string_view>(*this));
                }
 
                STORMBYTE_FORCE_INLINE std::vector<String> Split() const noexcept {
                    std::vector<String> out;
                    Split(static_cast<std::string_view>(*this), out);
                    return out;
                }
 
                STORMBYTE_FORCE_INLINE std::queue<String> Explode(char delimiter) const noexcept {
                    std::queue<String> out;
                    Explode(static_cast<std::string_view>(*this), delimiter, out);
                    return out;
                }
 
                inline bool operator==(const String& other) const noexcept {
                    return m_text == other.m_text;
                }
 
                inline bool operator!=(const String& other) const noexcept {
                    return !(*this == other);
                }
 
                inline bool operator==(const char* str) const noexcept {
                    return m_text == str;
                }
 
                inline bool operator!=(const char* str) const noexcept {
                    return !(*this == str);
                }
 
                inline std::strong_ordering operator<=>(const String& other) const noexcept {
                    return m_text <=> other.m_text;
                }
 
                inline std::strong_ordering operator<=>(const char* str) const noexcept {
                    return m_text <=> str;
                }
 
                void swap(String& other) noexcept;
 
            private:
                static Size FromIndex(std::size_t index) noexcept {
                    return index == std::string_view::npos ? npos : Size{index};
                }
 
                template<typename Needle>
                static Size FindAt(std::string_view self, Needle needle, Size pos) noexcept {
                    if (pos > Size{self.size()})
                        return npos;
                    return FromIndex(self.find(needle, static_cast<std::size_t>(pos)));
                }
 
                template<typename Needle>
                static Size RFindAt(std::string_view self, Needle needle, Size pos) noexcept {
                    const std::size_t start = pos == npos ? std::string_view::npos : static_cast<std::size_t>(pos);
                    return FromIndex(self.rfind(needle, start));
                }
 
                CString m_text; 
        };
 
        inline std::ostream& operator<<(std::ostream& stream, const String& text) {
            return stream << text.Bytes();
        }
 
        inline bool operator==(const char* str, const String& text) noexcept {
            return text == str;
        }
 
        inline bool operator!=(const char* str, const String& text) noexcept {
            return text != str;
        }
 
        inline void swap(String& left, String& right) noexcept {
            left.swap(right);
        }
    }
}
 
template<>
struct std::hash<StormByte::String::String> {
    std::size_t operator()(const StormByte::String::String& text) const noexcept {
        return std::hash<std::string_view>{}(static_cast<std::string_view>(text));
    }
};