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comparison: tools/profiler/JSStreamWriter.cpp
tools/profiler/JSStreamWriter.cpp
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| -1:000000000000 | 0:9250ae85b5e8 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "JSStreamWriter.h" | |
| 7 | |
| 8 #include "mozilla/ArrayUtils.h" // for ArrayLength | |
| 9 #include "nsDataHashtable.h" | |
| 10 #include "nsString.h" | |
| 11 #include "nsTArray.h" | |
| 12 #include "nsUTF8Utils.h" | |
| 13 | |
| 14 #if _MSC_VER | |
| 15 #define snprintf _snprintf | |
| 16 #endif | |
| 17 | |
| 18 #define ARRAY (void*)1 | |
| 19 #define OBJECT (void*)2 | |
| 20 | |
| 21 // Escape a UTF8 string to a stream. When an illegal encoding | |
| 22 // is found it will insert "INVALID" and the function will return. | |
| 23 static void EscapeToStream(std::ostream& stream, const char* str) { | |
| 24 stream << "\""; | |
| 25 | |
| 26 size_t len = strlen(str); | |
| 27 const char* end = &str[len]; | |
| 28 while (str < end) { | |
| 29 bool err; | |
| 30 const char* utf8CharStart = str; | |
| 31 uint32_t ucs4Char = UTF8CharEnumerator::NextChar(&str, end, &err); | |
| 32 | |
| 33 if (err) { | |
| 34 // Encoding error | |
| 35 stream << "INVALID\""; | |
| 36 return; | |
| 37 } | |
| 38 | |
| 39 // See http://www.ietf.org/rfc/rfc4627.txt?number=4627 | |
| 40 // characters that must be escaped: quotation mark, | |
| 41 // reverse solidus, and the control characters | |
| 42 // (U+0000 through U+001F). | |
| 43 if (ucs4Char == '\"') { | |
| 44 stream << "\\\""; | |
| 45 } else if (ucs4Char == '\\') { | |
| 46 stream << "\\\\"; | |
| 47 } else if (ucs4Char > 0xFF) { | |
| 48 char16_t chr[2]; | |
| 49 ConvertUTF8toUTF16 encoder(chr); | |
| 50 encoder.write(utf8CharStart, uint32_t(str-utf8CharStart)); | |
| 51 char escChar[13]; | |
| 52 snprintf(escChar, mozilla::ArrayLength(escChar), "\\u%04X\\u%04X", chr[0], chr[1]); | |
| 53 stream << escChar; | |
| 54 } else if (ucs4Char < 0x1F || ucs4Char > 0xFF) { | |
| 55 char escChar[7]; | |
| 56 snprintf(escChar, mozilla::ArrayLength(escChar), "\\u%04X", ucs4Char); | |
| 57 stream << escChar; | |
| 58 } else { | |
| 59 stream << char(ucs4Char); | |
| 60 } | |
| 61 } | |
| 62 stream << "\""; | |
| 63 } | |
| 64 | |
| 65 JSStreamWriter::JSStreamWriter(std::ostream& aStream) | |
| 66 : mStream(aStream) | |
| 67 , mNeedsComma(false) | |
| 68 , mNeedsName(false) | |
| 69 { } | |
| 70 | |
| 71 JSStreamWriter::~JSStreamWriter() | |
| 72 { | |
| 73 MOZ_ASSERT(mStack.GetSize() == 0); | |
| 74 } | |
| 75 | |
| 76 void | |
| 77 JSStreamWriter::BeginObject() | |
| 78 { | |
| 79 MOZ_ASSERT(!mNeedsName); | |
| 80 if (mNeedsComma && mStack.Peek() == ARRAY) { | |
| 81 mStream << ","; | |
| 82 } | |
| 83 mStream << "{"; | |
| 84 mNeedsComma = false; | |
| 85 mNeedsName = true; | |
| 86 mStack.Push(OBJECT); | |
| 87 } | |
| 88 | |
| 89 void | |
| 90 JSStreamWriter::EndObject() | |
| 91 { | |
| 92 MOZ_ASSERT(mStack.Peek() == OBJECT); | |
| 93 mStream << "}"; | |
| 94 mNeedsComma = true; | |
| 95 mNeedsName = false; | |
| 96 mStack.Pop(); | |
| 97 if (mStack.GetSize() > 0 && mStack.Peek() == OBJECT) { | |
| 98 mNeedsName = true; | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 void | |
| 103 JSStreamWriter::BeginArray() | |
| 104 { | |
| 105 MOZ_ASSERT(!mNeedsName); | |
| 106 if (mNeedsComma && mStack.Peek() == ARRAY) { | |
| 107 mStream << ","; | |
| 108 } | |
| 109 mStream << "["; | |
| 110 mNeedsComma = false; | |
| 111 mStack.Push(ARRAY); | |
| 112 } | |
| 113 | |
| 114 void | |
| 115 JSStreamWriter::EndArray() | |
| 116 { | |
| 117 MOZ_ASSERT(!mNeedsName); | |
| 118 MOZ_ASSERT(mStack.Peek() == ARRAY); | |
| 119 mStream << "]"; | |
| 120 mNeedsComma = true; | |
| 121 mStack.Pop(); | |
| 122 if (mStack.GetSize() > 0 && mStack.Peek() == OBJECT) { | |
| 123 mNeedsName = true; | |
| 124 } | |
| 125 } | |
| 126 | |
| 127 void | |
| 128 JSStreamWriter::Name(const char *aName) | |
| 129 { | |
| 130 MOZ_ASSERT(mNeedsName); | |
| 131 if (mNeedsComma && mStack.Peek() == OBJECT) { | |
| 132 mStream << ","; | |
| 133 } | |
| 134 EscapeToStream(mStream, aName); | |
| 135 mStream << ":"; | |
| 136 mNeedsName = false; | |
| 137 } | |
| 138 | |
| 139 void | |
| 140 JSStreamWriter::Value(int aValue) | |
| 141 { | |
| 142 MOZ_ASSERT(!mNeedsName); | |
| 143 if (mNeedsComma && mStack.Peek() == ARRAY) { | |
| 144 mStream << ","; | |
| 145 } | |
| 146 mStream << aValue; | |
| 147 mNeedsComma = true; | |
| 148 if (mStack.Peek() == OBJECT) { | |
| 149 mNeedsName = true; | |
| 150 } | |
| 151 } | |
| 152 | |
| 153 void | |
| 154 JSStreamWriter::Value(double aValue) | |
| 155 { | |
| 156 MOZ_ASSERT(!mNeedsName); | |
| 157 if (mNeedsComma && mStack.Peek() == ARRAY) { | |
| 158 mStream << ","; | |
| 159 } | |
| 160 mStream.precision(18); | |
| 161 mStream << aValue; | |
| 162 mNeedsComma = true; | |
| 163 if (mStack.Peek() == OBJECT) { | |
| 164 mNeedsName = true; | |
| 165 } | |
| 166 } | |
| 167 | |
| 168 void | |
| 169 JSStreamWriter::Value(const char *aValue) | |
| 170 { | |
| 171 MOZ_ASSERT(!mNeedsName); | |
| 172 if (mNeedsComma && mStack.Peek() == ARRAY) { | |
| 173 mStream << ","; | |
| 174 } | |
| 175 EscapeToStream(mStream, aValue); | |
| 176 mNeedsComma = true; | |
| 177 if (mStack.Peek() == OBJECT) { | |
| 178 mNeedsName = true; | |
| 179 } | |
| 180 } |
