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 #include <string.h>
  25
  26 #include <string>
  27 #include <map>
  28 #include <vector>
  29
  30 namespace dyld3 {
  31 namespace json {
  32
  33 struct Node
  34 {
  35     std::string                 value;
  36     std::map<std::string, Node> map;
  37     std::vector<Node>           array;
  38 };
  39
  40 static inline std::string hex(uint64_t value) {
  41     char buff[64];
  42     sprintf(buff, "0x%llX", value);
  43     return buff;
  44 }
  45
  46 static inline std::string hex4(uint64_t value) {
  47     char buff[64];
  48     sprintf(buff, "0x%04llX", value);
  49     return buff;
  50 }
  51
  52 static inline std::string hex8(uint64_t value) {
  53     char buff[64];
  54     sprintf(buff, "0x%08llX", value);
  55     return buff;
  56 }
  57
  58 static inline std::string decimal(uint64_t value) {
  59     char buff[64];
  60     sprintf(buff, "%llu", value);
  61     return buff;
  62 }
  63
  64 static inline void indentBy(uint32_t spaces, FILE* out) {
  65     for (int i=0; i < spaces; ++i) {
  66         fprintf(out, " ");
  67     }
  68 }
  69
  70 static inline void printJSON(const Node& node, uint32_t indent, FILE* out)
  71 {
  72     if ( !node.map.empty() ) {
  73         fprintf(out, "{");
  74         bool needComma = false;
  75         for (const auto& entry : node.map) {
  76             if ( needComma )
  77                 fprintf(out, ",");
  78             fprintf(out, "\n");
  79             indentBy(indent+2, out);
  80             fprintf(out, "\"%s\": ", entry.first.c_str());
  81             printJSON(entry.second, indent+2, out);
  82             needComma = true;
  83         }
  84         fprintf(out, "\n");
  85         indentBy(indent, out);
  86         fprintf(out, "}");
  87     }
  88     else if ( !node.array.empty() ) {
  89         fprintf(out, "[");
  90         bool needComma = false;
  91         for (const auto& entry : node.array) {
  92             if ( needComma )
  93                 fprintf(out, ",");
  94             fprintf(out, "\n");
  95             indentBy(indent+2, out);
  96             printJSON(entry, indent+2, out);
  97             needComma = true;
  98         }
  99         fprintf(out, "\n");
 100         indentBy(indent, out);
 101         fprintf(out, "]");
 102     }
 103     else {
 104         fprintf(out, "\"%s\"", node.value.c_str());
 105     }
 106     if ( indent == 0 )
 107         fprintf(out, "\n");
 108 }
 109
 110
 111 } // namespace json
 112 } // namespace dyld3