#include "json_utils.h" namespace node { std::string EscapeJsonChars(std::string_view str) { // 'static constexpr' is slightly better than static const // since the initialization occurs at compile time. // See https://lemire.me/blog/I3Cah static constexpr std::string_view control_symbols[0x20] = { "\\u0000", "\\u0001", "\\u0002", "\\u0003", "\\u0004", "\\u0005", "\\u0006", "\\u0007", "\\b", "\\t", "\\n", "\\u000b", "\\f", "\\r", "\\u000e", "\\u000f", "\\u0010", "\\u0011", "\\u0012", "\\u0013", "\\u0014", "\\u0015", "\\u0016", "\\u0017", "\\u0018", "\\u0019", "\\u001a", "\\u001b", "\\u001c", "\\u001d", "\\u001e", "\\u001f"}; std::string ret; size_t last_pos = 0; size_t pos = 0; for (; pos < str.size(); ++pos) { std::string replace; char ch = str[pos]; if (ch == '\\') { replace = "\\\\"; } else if (ch == '\"') { replace = "\\\""; } else { size_t num = static_cast(ch); if (num < 0x20) replace = control_symbols[num]; } if (!replace.empty()) { if (pos > last_pos) { ret += str.substr(last_pos, pos - last_pos); } last_pos = pos + 1; ret += replace; } } // Append any remaining symbols. if (last_pos < str.size()) { ret += str.substr(last_pos, pos - last_pos); } return ret; } std::string Reindent(const std::string& str, int indent_depth) { if (indent_depth <= 0) return str; const std::string indent(indent_depth, ' '); std::string out; std::string::size_type pos = 0; for (;;) { std::string::size_type prev_pos = pos; pos = str.find('\n', pos); out.append(indent); if (pos == std::string::npos) { out.append(str, prev_pos, std::string::npos); break; } else { pos++; out.append(str, prev_pos, pos - prev_pos); } } return out; } } // namespace node