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117 lines
3.0 KiB
C++
117 lines
3.0 KiB
C++
#include "str.hpp"
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#include <cstring>
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#include <string>
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#ifdef _WIN32
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#include <llarp/win32/exception.hpp>
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#include <windows.h>
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#include <stringapiset.h>
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#endif
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namespace llarp
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{
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constexpr static char whitespace[] = " \t\n\r\f\v";
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std::string_view
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TrimWhitespace(std::string_view str)
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{
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size_t begin = str.find_first_not_of(whitespace);
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if (begin == std::string_view::npos)
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{
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str.remove_prefix(str.size());
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return str;
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}
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str.remove_prefix(begin);
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size_t end = str.find_last_not_of(whitespace);
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if (end != std::string_view::npos)
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str.remove_suffix(str.size() - end - 1);
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return str;
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}
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using namespace std::literals;
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std::vector<std::string_view>
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split(std::string_view str, const std::string_view delim, bool trim)
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{
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std::vector<std::string_view> results;
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// Special case for empty delimiter: splits on each character boundary:
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if (delim.empty())
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{
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results.reserve(str.size());
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for (size_t i = 0; i < str.size(); i++)
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results.emplace_back(str.data() + i, 1);
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return results;
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}
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for (size_t pos = str.find(delim); pos != std::string_view::npos; pos = str.find(delim))
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{
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if (!trim || !results.empty() || pos > 0)
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results.push_back(str.substr(0, pos));
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str.remove_prefix(pos + delim.size());
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}
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if (!trim || str.size())
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results.push_back(str);
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else
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while (!results.empty() && results.back().empty())
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results.pop_back();
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return results;
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}
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std::vector<std::string_view>
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split_any(std::string_view str, const std::string_view delims, bool trim)
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{
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if (delims.empty())
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return split(str, delims, trim);
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std::vector<std::string_view> results;
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for (size_t pos = str.find_first_of(delims); pos != std::string_view::npos;
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pos = str.find_first_of(delims))
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{
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if (!trim || !results.empty() || pos > 0)
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results.push_back(str.substr(0, pos));
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size_t until = str.find_first_not_of(delims, pos + 1);
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if (until == std::string_view::npos)
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str.remove_prefix(str.size());
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else
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str.remove_prefix(until);
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}
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if (!trim || str.size())
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results.push_back(str);
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else
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while (!results.empty() && results.back().empty())
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results.pop_back();
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return results;
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}
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std::string
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lowercase_ascii_string(std::string src)
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{
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for (char& ch : src)
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if (ch >= 'A' && ch <= 'Z')
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ch = ch + ('a' - 'A');
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return src;
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}
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std::wstring
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to_wide(std::string data)
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{
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std::wstring buf;
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buf.resize(data.size());
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#ifdef _WIN32
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// win32 specific codepath because balmer made windows so that man may suffer
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if (MultiByteToWideChar(CP_UTF8, 0, data.c_str(), data.size(), buf.data(), buf.size()) == 0)
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throw win32::error{GetLastError(), "failed to convert string to wide string"};
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#else
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// this dumb but probably works (i guess?)
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std::transform(
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data.begin(), data.end(), buf.begin(), [](const auto& ch) -> wchar_t { return ch; });
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#endif
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return buf;
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}
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} // namespace llarp
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