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| 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 #include "platform/assert.h" |
| 6 #include "vm/json_stream.h" |
| 7 |
| 8 |
| 9 namespace dart { |
| 10 |
| 11 JSONStream::JSONStream(TextBuffer* buffer) { |
| 12 ASSERT(buffer != NULL); |
| 13 buffer_ = buffer; |
| 14 open_objects_ = 0; |
| 15 } |
| 16 |
| 17 |
| 18 JSONStream::~JSONStream() { |
| 19 } |
| 20 |
| 21 |
| 22 void JSONStream::Clear() { |
| 23 buffer_->Clear(); |
| 24 open_objects_ = 0; |
| 25 } |
| 26 |
| 27 |
| 28 void JSONStream::OpenObject(const char* property_name) { |
| 29 PrintCommaIfNeeded(); |
| 30 open_objects_++; |
| 31 if (property_name != NULL) { |
| 32 PrintPropertyName(property_name); |
| 33 } |
| 34 buffer_->AddChar('{'); |
| 35 } |
| 36 |
| 37 |
| 38 void JSONStream::CloseObject() { |
| 39 ASSERT(open_objects_ > 0); |
| 40 open_objects_--; |
| 41 buffer_->AddChar('}'); |
| 42 } |
| 43 |
| 44 |
| 45 void JSONStream::OpenArray(const char* property_name) { |
| 46 PrintCommaIfNeeded(); |
| 47 if (property_name != NULL) { |
| 48 PrintPropertyName(property_name); |
| 49 } |
| 50 open_objects_++; |
| 51 buffer_->AddChar('['); |
| 52 } |
| 53 |
| 54 |
| 55 void JSONStream::CloseArray() { |
| 56 ASSERT(open_objects_ > 0); |
| 57 open_objects_--; |
| 58 buffer_->AddChar(']'); |
| 59 } |
| 60 |
| 61 |
| 62 void JSONStream::PrintValueBool(bool b) { |
| 63 PrintCommaIfNeeded(); |
| 64 buffer_->Printf("%s", b ? "true" : "false"); |
| 65 } |
| 66 |
| 67 |
| 68 void JSONStream::PrintValue(intptr_t i) { |
| 69 PrintCommaIfNeeded(); |
| 70 buffer_->Printf("%"Pd"", i); |
| 71 } |
| 72 |
| 73 |
| 74 void JSONStream::PrintValue(double d) { |
| 75 PrintCommaIfNeeded(); |
| 76 buffer_->Printf("%f", d); |
| 77 } |
| 78 |
| 79 |
| 80 void JSONStream::PrintValue(const char* s) { |
| 81 PrintCommaIfNeeded(); |
| 82 buffer_->Printf("\"%s\"", s); |
| 83 } |
| 84 |
| 85 |
| 86 void JSONStream::PrintPropertyBool(const char* name, bool b) { |
| 87 PrintPropertyName(name); |
| 88 PrintValueBool(b); |
| 89 } |
| 90 |
| 91 |
| 92 void JSONStream::PrintProperty(const char* name, intptr_t i) { |
| 93 PrintPropertyName(name); |
| 94 PrintValue(i); |
| 95 } |
| 96 |
| 97 |
| 98 void JSONStream::PrintProperty(const char* name, double d) { |
| 99 PrintPropertyName(name); |
| 100 PrintValue(d); |
| 101 } |
| 102 |
| 103 |
| 104 void JSONStream::PrintProperty(const char* name, const char* s) { |
| 105 PrintPropertyName(name); |
| 106 PrintValue(s); |
| 107 } |
| 108 |
| 109 |
| 110 void JSONStream::PrintPropertyName(const char* name) { |
| 111 ASSERT(name != NULL); |
| 112 PrintCommaIfNeeded(); |
| 113 buffer_->Printf("\"%s\":", name); |
| 114 } |
| 115 |
| 116 |
| 117 void JSONStream::PrintCommaIfNeeded() { |
| 118 if (NeedComma()) { |
| 119 buffer_->AddChar(','); |
| 120 } |
| 121 } |
| 122 |
| 123 |
| 124 bool JSONStream::NeedComma() { |
| 125 const char* buffer = buffer_->buf(); |
| 126 intptr_t length = buffer_->length(); |
| 127 if (length == 0) { |
| 128 return false; |
| 129 } |
| 130 char ch = buffer[length-1]; |
| 131 return ch != '[' && ch != '{' && ch != ':' && ch != ','; |
| 132 } |
| 133 |
| 134 } // namespace dart |
| 135 |
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