dyld3/JSONWriter.h

   1 /*
   2  * Copyright (c) 2017 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #ifndef __JSON_WRITER_H__
  25 #define __JSON_WRITER_H__
  26
  27 #include <iostream>
  28
  29 #include "JSON.h"
  30
  31 namespace dyld3 {
  32 namespace json {
  33
  34 static inline std::string hex(uint64_t value) {
  35     char buff[64];
  36     sprintf(buff, "0x%llX", value);
  37     return buff;
  38 }
  39
  40 static inline std::string hex4(uint64_t value) {
  41     char buff[64];
  42     sprintf(buff, "0x%04llX", value);
  43     return buff;
  44 }
  45
  46 static inline std::string hex8(uint64_t value) {
  47     char buff[64];
  48     sprintf(buff, "0x%08llX", value);
  49     return buff;
  50 }
  51
  52 static inline std::string decimal(uint64_t value) {
  53     char buff[64];
  54     sprintf(buff, "%llu", value);
  55     return buff;
  56 }
  57
  58 static inline void indentBy(uint32_t spaces, std::ostream& out) {
  59     for (uint32_t i=0; i < spaces; ++i) {
  60         out << " ";
  61     }
  62 }
  63
  64 static inline void printJSON(const Node& node, uint32_t indent, std::ostream& out)
  65 {
  66     if ( !node.map.empty() ) {
  67         out << "{";
  68         bool needComma = false;
  69         for (const auto& entry : node.map) {
  70             if ( needComma )
  71                 out << ",";
  72             out << "\n";
  73             indentBy(indent+2, out);
  74             out << "\"" << entry.first << "\": ";
  75             printJSON(entry.second, indent+2, out);
  76             needComma = true;
  77         }
  78         out << "\n";
  79         indentBy(indent, out);
  80         out << "}";
  81     }
  82     else if ( !node.array.empty() ) {
  83         out << "[";
  84         bool needComma = false;
  85         for (const auto& entry : node.array) {
  86             if ( needComma )
  87                 out << ",";
  88             out << "\n";
  89             indentBy(indent+2, out);
  90             printJSON(entry, indent+2, out);
  91             needComma = true;
  92         }
  93         out << "\n";
  94         indentBy(indent, out);
  95         out << "]";
  96     }
  97     else {
  98         std::string escapedString;
  99         escapedString.reserve(node.value.size());
 100         for (char c : node.value) {
 101             if (c == '"')
 102                 escapedString += '\\';
 103             escapedString += c;
 104         }
 105         out << "\"" << escapedString << "\"";
 106     }
 107     if ( indent == 0 )
 108         out << "\n";
 109 }
 110
 111
 112 } // namespace json
 113 } // namespace dyld3
 114
 115
 116 #endif // __JSON_WRITER_H__