| // Copyright (c) 2019 Pantor. All rights reserved. |
| |
| #ifndef INCLUDE_INJA_UTILS_HPP_ |
| #define INCLUDE_INJA_UTILS_HPP_ |
| |
| #include <algorithm> |
| #include <fstream> |
| #include <stdexcept> |
| #include <string> |
| #include <utility> |
| |
| #include "string_view.hpp" |
| |
| |
| namespace inja { |
| |
| inline void inja_throw(const std::string& type, const std::string& message) { |
| throw std::runtime_error("[inja.exception." + type + "] " + message); |
| } |
| |
| inline std::ifstream open_file_or_throw(const std::string& path) { |
| std::ifstream file; |
| file.exceptions(std::ifstream::failbit | std::ifstream::badbit); |
| try { |
| file.open(path); |
| } catch(const std::ios_base::failure& /*e*/) { |
| inja_throw("file_error", "failed accessing file at '" + path + "'"); |
| } |
| return file; |
| } |
| |
| namespace string_view { |
| inline nonstd::string_view slice(nonstd::string_view view, size_t start, size_t end) { |
| start = std::min(start, view.size()); |
| end = std::min(std::max(start, end), view.size()); |
| return view.substr(start, end - start); // StringRef(Data + Start, End - Start); |
| } |
| |
| inline std::pair<nonstd::string_view, nonstd::string_view> split(nonstd::string_view view, char Separator) { |
| size_t idx = view.find(Separator); |
| if (idx == nonstd::string_view::npos) { |
| return std::make_pair(view, nonstd::string_view()); |
| } |
| return std::make_pair(slice(view, 0, idx), slice(view, idx + 1, nonstd::string_view::npos)); |
| } |
| |
| inline bool starts_with(nonstd::string_view view, nonstd::string_view prefix) { |
| return (view.size() >= prefix.size() && view.compare(0, prefix.size(), prefix) == 0); |
| } |
| } // namespace string_view |
| |
| } // namespace inja |
| |
| #endif // INCLUDE_INJA_UTILS_HPP_ |