File: JsonWriter.h

package info (click to toggle)
chromium 138.0.7204.157-1
  • links: PTS, VCS
  • area: main
  • in suites: sid, trixie
  • size: 6,071,864 kB
  • sloc: cpp: 34,936,859; ansic: 7,176,967; javascript: 4,110,704; python: 1,419,953; asm: 946,768; xml: 739,967; pascal: 187,324; sh: 89,623; perl: 88,663; objc: 79,944; sql: 50,304; cs: 41,786; fortran: 24,137; makefile: 21,806; php: 13,980; tcl: 13,166; yacc: 8,925; ruby: 7,485; awk: 3,720; lisp: 3,096; lex: 1,327; ada: 727; jsp: 228; sed: 36
file content (82 lines) | stat: -rw-r--r-- 1,932 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef TOOLS_BLINK_GC_PLUGIN_JSON_WRITER_H_
#define TOOLS_BLINK_GC_PLUGIN_JSON_WRITER_H_

#include <memory>
#include <stack>

#include "llvm/Support/raw_ostream.h"

// Helper to write information for the points-to graph.
class JsonWriter {
 public:
  static JsonWriter* from(std::unique_ptr<llvm::raw_ostream> os) {
    return os ? new JsonWriter(std::move(os)) : 0;
  }
  void OpenList() {
    Separator();
    *os_ << "[";
    state_.push(false);
  }
  void OpenList(const std::string& key) {
    Write(key);
    *os_ << ":";
    OpenList();
  }
  void CloseList() {
    *os_ << "]";
    state_.pop();
  }
  void OpenObject() {
    Separator();
    *os_ << "{";
    state_.push(false);
  }
  void CloseObject() {
    *os_ << "}\n";
    state_.pop();
  }
  void Write(const size_t val) {
    Separator();
    *os_ << val;
  }
  void Write(const std::string& val) {
    Separator();
    *os_ << "\"" << Escape(val) << "\"";
  }
  void Write(const std::string& key, const size_t val) {
    Separator();
    *os_ << "\"" << Escape(key) << "\":" << val;
  }
  void Write(const std::string& key, const std::string& val) {
    Separator();
    *os_ << "\"" << Escape(key) << "\":\"" << Escape(val) << "\"";
  }
 private:
  JsonWriter(std::unique_ptr<llvm::raw_ostream> os) : os_(std::move(os)) {}
  void Separator() {
    if (state_.empty())
      return;
    if (state_.top()) {
      *os_ << ",";
      return;
    }
    state_.top() = true;
  }
  std::string Escape(const std::string& s) {
    std::string copy = s;
    size_t i = 0;
    while ((i = copy.find('\\', i)) != std::string::npos) {
      copy.replace(i, 1, "\\\\");
      i += 2;
    }
    return copy;
  }
  std::unique_ptr<llvm::raw_ostream> os_;
  std::stack<bool> state_;
};

#endif // TOOLS_BLINK_GC_PLUGIN_JSON_WRITER_H_