GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: json_utils.h Lines: 96 96 100.0 %
Date: 2022-11-20 04:28:36 Branches: 21 22 95.5 %

Line Branch Exec Source
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#ifndef SRC_JSON_UTILS_H_
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#define SRC_JSON_UTILS_H_
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#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#include <iomanip>
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#include <ostream>
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#include <limits>
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#include <string>
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namespace node {
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std::string EscapeJsonChars(const std::string& str);
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std::string Reindent(const std::string& str, int indentation);
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// JSON compiler definitions.
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class JSONWriter {
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 public:
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  JSONWriter(std::ostream& out, bool compact)
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    : out_(out), compact_(compact) {}
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 private:
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  inline void indent() { indent_ += 2; }
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  inline void deindent() { indent_ -= 2; }
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  inline void advance() {
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    if (compact_) return;
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    for (int i = 0; i < indent_; i++) out_ << ' ';
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  }
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  inline void write_one_space() {
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    if (compact_) return;
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    out_ << ' ';
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  }
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  inline void write_new_line() {
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    if (compact_) return;
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    out_ << '\n';
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  }
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 public:
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  inline void json_start() {
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    if (state_ == kAfterValue) out_ << ',';
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    write_new_line();
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    advance();
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    out_ << '{';
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    indent();
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    state_ = kObjectStart;
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  }
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  inline void json_end() {
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    write_new_line();
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    deindent();
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    advance();
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    out_ << '}';
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    state_ = kAfterValue;
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  }
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  template <typename T>
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  inline void json_objectstart(T key) {
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    if (state_ == kAfterValue) out_ << ',';
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    write_new_line();
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    advance();
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    write_string(key);
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    out_ << ':';
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    write_one_space();
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    out_ << '{';
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    indent();
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    state_ = kObjectStart;
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  }
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  template <typename T>
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  inline void json_arraystart(T key) {
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    if (state_ == kAfterValue) out_ << ',';
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    write_new_line();
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    advance();
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    write_string(key);
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    out_ << ':';
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    write_one_space();
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    out_ << '[';
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    indent();
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    state_ = kObjectStart;
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  }
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  inline void json_objectend() {
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    write_new_line();
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    deindent();
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    advance();
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    out_ << '}';
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    if (indent_ == 0) {
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      // Top-level object is complete, so end the line.
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      out_ << '\n';
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    }
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    state_ = kAfterValue;
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  }
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  inline void json_arrayend() {
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    write_new_line();
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    deindent();
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    advance();
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    out_ << ']';
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    state_ = kAfterValue;
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  }
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  template <typename T, typename U>
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  inline void json_keyvalue(const T& key, const U& value) {
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    if (state_ == kAfterValue) out_ << ',';
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    write_new_line();
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    advance();
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    write_string(key);
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    out_ << ':';
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    write_one_space();
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    write_value(value);
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    state_ = kAfterValue;
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  }
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  template <typename U>
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  inline void json_element(const U& value) {
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    if (state_ == kAfterValue) out_ << ',';
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    write_new_line();
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    advance();
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    write_value(value);
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    state_ = kAfterValue;
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  }
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  struct Null {};  // Usable as a JSON value.
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  struct ForeignJSON {
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    std::string as_string;
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  };
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 private:
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  template <typename T,
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            typename test_for_number = typename std::
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                enable_if<std::numeric_limits<T>::is_specialized, bool>::type>
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  inline void write_value(T number) {
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    if constexpr (std::is_same<T, bool>::value)
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      out_ << (number ? "true" : "false");
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    else
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      out_ << number;
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  }
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  inline void write_value(Null null) { out_ << "null"; }
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  inline void write_value(const char* str) { write_string(str); }
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  inline void write_value(const std::string& str) { write_string(str); }
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  inline void write_value(const ForeignJSON& json) {
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    out_ << Reindent(json.as_string, indent_);
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  }
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  inline void write_string(const std::string& str) {
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    out_ << '"' << EscapeJsonChars(str) << '"';
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  }
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  inline void write_string(const char* str) { write_string(std::string(str)); }
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  enum JSONState { kObjectStart, kAfterValue };
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  std::ostream& out_;
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  bool compact_;
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  int indent_ = 0;
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  int state_ = kObjectStart;
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};
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}  // namespace node
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#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
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#endif  // SRC_JSON_UTILS_H_