String.cpp

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#include <sourcepp/String.h>
 
#include <algorithm>
#include <cctype>
#include <format>
#include <random>
#include <ranges>
#include <sstream>
 
namespace {
 
std::mt19937& getRandomGenerator() {
    static std::random_device random_device{};
    static std::mt19937 generator{random_device()};
    return generator;
}
 
} // namespace
 
using namespace sourcepp;
 
bool string::contains(std::string_view s, char c) {
    return std::ranges::find(s, c) != s.end();
}
 
bool string::matches(std::string_view in, std::string_view search) {
    int inPos = 0, searchPos = 0;
    for ( ; inPos < in.length() && searchPos < search.length(); inPos++, searchPos++) {
        if (search[searchPos] == '%') {
            if (++searchPos == search.length()) {
                return false;
            }
            switch (search[searchPos]) {
                default:
                case '?': // wildcard
                    break;
                case 'w': // whitespace
                    if (!std::isspace(in[inPos])) return false;
                    break;
                case 'a': // letter
                    if (!(in[inPos] >= 'a' && in[inPos] <= 'z' || in[inPos] >= 'A' && in[inPos] <= 'Z')) return false;
                    break;
                case 'u': // uppercase letter
                    if (!(in[inPos] >= 'A' && in[inPos] <= 'Z')) return false;
                    break;
                case 'l': // lowercase letter
                    if (!(in[inPos] >= 'a' && in[inPos] <= 'z')) return false;
                    break;
                case 'd': // digit
                    if (!std::isdigit(in[inPos])) return false;
                    break;
                case '%': // escaped percent
                    if (in[inPos] != '%') return false;
                    break;
            }
        } else if (in[inPos] != search[searchPos]) {
            return false;
        }
    }
    return inPos == in.length() && searchPos == search.length();
}
 
bool string::iequals(std::string_view s1, std::string_view s2) {
    return std::ranges::equal(s1, s2, [](char a, char b) { return std::tolower(a) == std::tolower(b); });
}
 
// https://stackoverflow.com/a/217605
 
void string::ltrim(std::string& s) {
    s.erase(s.begin(), std::ranges::find_if(s, [](char c) { return !std::isspace(c); }));
}
 
std::string_view string::ltrim(std::string_view s) {
    while (!s.empty() && std::isspace(s[0])) {
        s.remove_prefix(1);
    }
    return s;
}
 
void string::rtrim(std::string& s) {
    s.erase(std::find_if(s.rbegin(), s.rend(), [](char c) { return !std::isspace(c); }).base(), s.end());
}
 
std::string_view string::rtrim(std::string_view s) {
    while (!s.empty() && std::isspace(s[s.size() - 1])) {
        s.remove_suffix(1);
    }
    return s;
}
 
void string::trim(std::string& s) {
    rtrim(s);
    ltrim(s);
}
 
std::string_view string::trim(std::string_view s) {
    return ltrim(rtrim(s));
}
 
void string::trimInternal(std::string& s) {
    s.erase(std::ranges::unique(s, [](char lhs, char rhs) { return lhs == rhs && std::isspace(lhs); }).begin(), s.end());
}
 
std::string string::trimInternal(std::string_view s) {
    std::string out{s};
    trimInternal(out);
    return out;
}
 
void string::ltrim(std::string& s, std::string_view chars) {
    s.erase(s.begin(), std::ranges::find_if(s, [chars](char c) {
        return !contains(chars, c);
    }));
}
 
std::string_view string::ltrim(std::string_view s, std::string_view chars) {
    while (!s.empty() && contains(chars, s[0])) {
        s.remove_prefix(1);
    }
    return s;
}
 
void string::rtrim(std::string& s, std::string_view chars) {
    s.erase(std::find_if(s.rbegin(), s.rend(), [chars](char c) {
        return !contains(chars, c);
    }).base(), s.end());
}
 
std::string_view string::rtrim(std::string_view s, std::string_view chars) {
    while (!s.empty() && contains(chars, s[s.size() - 1])) {
        s.remove_suffix(1);
    }
    return s;
}
 
void string::trim(std::string& s, std::string_view chars) {
    rtrim(s, chars);
    ltrim(s, chars);
}
 
std::string_view string::trim(std::string_view s, std::string_view chars) {
    return ltrim(rtrim(s, chars), chars);
}
 
void string::trimInternal(std::string& s, std::string_view chars) {
    s.erase(std::ranges::unique(s, [chars](char lhs, char rhs) { return lhs == rhs && std::ranges::find(chars, lhs) != chars.end(); }).begin(), s.end());
}
 
std::string string::trimInternal(std::string_view s, std::string_view chars) {
    std::string out{s};
    trimInternal(out, chars);
    return out;
}
 
// https://stackoverflow.com/a/46931770
 
std::vector<std::string> string::split(std::string_view s, char delim) {
    std::vector<std::string> result;
    std::stringstream ss(std::string{s});
    std::string item;
    while (std::getline(ss, item, delim)) {
        result.push_back(item);
    }
    return result;
}
 
void string::toLower(std::string& input) {
    std::ranges::transform(input, input.begin(), [](unsigned char c){ return std::tolower(c); });
}
 
std::string string::toLower(std::string_view input) {
    std::string out{input};
    toLower(out);
    return out;
}
 
void string::toUpper(std::string& input) {
    std::ranges::transform(input, input.begin(), [](unsigned char c){ return std::toupper(c); });
}
 
std::string string::toUpper(std::string_view input) {
    std::string out{input};
    toUpper(out);
    return out;
}
 
std::string string::createRandom(uint16_t length, std::string_view chars) {
    auto& generator = ::getRandomGenerator();
    std::uniform_int_distribution distribution{0, static_cast<int>(chars.length() - 1)};
 
    std::string out;
    for (uint16_t i = 0; i < length; i++) {
        out += chars[distribution(generator)];
    }
 
    return out;
}
 
std::string string::generateUUIDv4() {
    static constexpr std::string_view chars = "0123456789abcdef";
 
    auto& generator = ::getRandomGenerator();
    std::uniform_int_distribution distribution{0, static_cast<int>(chars.length() - 1)};
 
    std::string out;
    for (uint16_t i = 0; i < 8; i++) {
        out += chars[distribution(generator)];
    }
    out += '-';
    for (uint16_t i = 0; i < 3; i++) {
        for (uint16_t j = 0; j < 4; j++) {
            out += chars[distribution(generator)];
        }
        out += '-';
    }
    for (uint16_t i = 0; i < 12; i++) {
        out += chars[distribution(generator)];
    }
 
    return out;
}
 
std::string string::padNumber(int64_t number, int width) {
    return std::format("{:0>{}}", number, width);
}
 
void string::normalizeSlashes(std::string& path, bool stripSlashPrefix, bool stripSlashSuffix) {
    std::ranges::replace(path, '\\', '/');
    if (stripSlashPrefix && path.starts_with('/')) {
        path = path.substr(1);
    }
    if (stripSlashSuffix && path.ends_with('/')) {
        path.pop_back();
    }
}
 
void string::denormalizeSlashes(std::string& path, bool stripSlashPrefix, bool stripSlashSuffix) {
    std::ranges::replace(path, '/', '\\');
    if (stripSlashPrefix && path.starts_with('\\')) {
        path = path.substr(1);
    }
    if (stripSlashSuffix && path.ends_with('\\')) {
        path.pop_back();
    }
}
 
std::from_chars_result string::toBool(std::string_view number, bool& out, int base) {
    uint8_t tmp;
    const auto result = std::from_chars(number.data(), number.data() + number.size(), tmp, base);
    out = tmp;
    return result;
}
 
std::vector<std::byte> string::decodeHex(std::string_view hex) {
    static constexpr auto hexChar2Int = [](char c) -> uint8_t {
        if (c >= '0' && c <= '9') {
            return c - '0';
        }
        if (c >= 'a' && c <= 'f') {
            return c - 'a' + 10;
        }
        if (c >= 'A' && c <= 'F') {
            return c - 'A' + 10;
        }
        return 0;
    };
 
    const bool remainder = hex.size() % 2;
 
    std::vector<std::byte> hexData;
    hexData.reserve(hex.size() / 2 + remainder);
    if (remainder) {
        hexData.push_back(static_cast<std::byte>(hexChar2Int(hex.front())));
    }
    for (int i = remainder; i < hex.length(); i += 2) {
        hexData.push_back(static_cast<std::byte>(hexChar2Int(hex[i]) << 4 | hexChar2Int(hex[i + 1])));
    }
    return hexData;
}
 
std::string string::encodeHex(std::span<const std::byte> hex) {
    std::string hexStr;
    hexStr.reserve(hex.size() * 2);
    for (const auto byte : hex) {
        hexStr.append(std::format("{:02x}", static_cast<int>(byte)));
    }
    return hexStr;
}