libhttpserver/src/string_utilities.cpp at master · etr/libhttpserver · GitHub

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This file is part of libhttpserver

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library 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 along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301

USA

#include "httpserver/string_utilities.hpp"

#include <algorithm>

#include <cctype>

#include <string>

#include <utility>

#include <vector>

namespace httpserver {

namespace string_utilities {

const std::string to_upper_copy(const std::string& str) {

std::string result = str;

std::transform(result.begin(), result.end(), result.begin(), (int(*)(int)) std::toupper);

return result;

}

const std::string to_lower_copy(const std::string& str) {

std::string result = str;

std::transform(result.begin(), result.end(), result.begin(), (int(*)(int)) std::tolower);

return result;

}

const std::vector<std::string> string_split(const std::string& s, char sep, bool collapse) {

std::vector<std::string> result;

if (s.empty()) return result;

std::string::size_type start = 0;

std::string::size_type end;

while ((end = s.find(sep, start)) != std::string::npos) {

std::string token = s.substr(start, end - start);

if (!collapse || !token.empty()) {

result.push_back(std::move(token));

}

start = end + 1;

}

// Handle the last token (after the final separator)

// Only add if there's content or if not collapsing

// Note: match istringstream behavior which does not emit trailing empty token

if (start < s.size()) {

std::string token = s.substr(start);

if (!collapse || !token.empty()) {

result.push_back(std::move(token));

}

return result;

}

bool is_valid_hex(const std::string& s) {

for (char c : s) {

if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||

(c >= 'A' && c <= 'F'))) {

return false;

}

return true;

}

unsigned char hex_char_to_val(char c) {

if (c >= '0' && c <= '9') return static_cast<unsigned char>(c - '0');

if (c >= 'a' && c <= 'f') return static_cast<unsigned char>(c - 'a' + 10);

if (c >= 'A' && c <= 'F') return static_cast<unsigned char>(c - 'A' + 10);

return 0;

}

} // namespace string_utilities

} // namespace httpserver

libhttpserver/src/string_utilities.cpp at master · etr/libhttpserver · GitHub

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