Mercurial > code
annotate C++/Json.cpp @ 314:4c3019385769
Json: add iterators
TODO:
- Test operator->, const_iterator must not let modify
- Test const and non const operator[]
| author | David Demelier <markand@malikania.fr> |
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| date | Wed, 25 Feb 2015 13:53:41 +0100 |
| parents | ea1a73a7d468 |
| children | b67b2da45bb0 |
| rev | line source |
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1 /* |
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2 * Json.cpp -- jansson C++11 wrapper |
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3 * |
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4 * Copyright (c) 2013, 2014 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
| 314 | 19 #include <stdexcept> |
| 20 | |
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21 #include "Json.h" |
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22 |
| 311 | 23 /* -------------------------------------------------------- |
| 314 | 24 * JsonObject |
| 311 | 25 * -------------------------------------------------------- */ |
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26 |
| 314 | 27 JsonObject JsonValue::toObject() const noexcept |
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28 { |
| 311 | 29 json_incref(m_handle.get()); |
| 30 | |
| 314 | 31 return JsonObject(m_handle.get()); |
| 311 | 32 } |
| 33 | |
| 314 | 34 JsonArray JsonValue::toArray() const noexcept |
| 311 | 35 { |
| 36 json_incref(m_handle.get()); | |
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37 |
| 314 | 38 return JsonArray(m_handle.get()); |
| 311 | 39 } |
| 40 | |
| 41 /* -------------------------------------------------------- | |
| 42 * JsonArray | |
| 43 * -------------------------------------------------------- */ | |
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44 |
| 314 | 45 JsonValue JsonArray::at(int index) const |
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46 { |
| 311 | 47 auto value = json_array_get(m_handle.get(), index); |
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48 |
| 311 | 49 if (value == nullptr) |
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50 throw JsonError{"index out of bounds"}; |
| 311 | 51 |
| 52 json_incref(value); | |
| 53 | |
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54 return JsonValue{value}; |
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55 } |
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56 |
| 314 | 57 JsonValue JsonArray::operator[](int index) const noexcept |
| 58 { | |
| 59 auto value = json_array_get(m_handle.get(), index); | |
| 60 | |
| 61 if (value == nullptr) | |
| 62 return JsonValue(); | |
| 63 | |
| 64 json_incref(value); | |
| 65 | |
| 66 return JsonValue(value); | |
| 67 } | |
| 68 | |
| 69 JsonArray::Ref JsonArray::operator[](int index) noexcept | |
| 70 { | |
| 71 auto value = json_array_get(m_handle.get(), index); | |
| 72 | |
| 73 if (value == nullptr) | |
| 74 value = json_null(); | |
| 75 else | |
| 76 json_incref(value); | |
| 77 | |
| 78 return Ref(value, *this, index); | |
| 79 } | |
| 80 | |
| 311 | 81 /* -------------------------------------------------------- |
| 82 * JsonObject | |
| 83 * -------------------------------------------------------- */ | |
| 84 | |
| 314 | 85 JsonObject::Ref JsonObject::operator[](const std::string &name) |
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86 { |
| 314 | 87 if (typeOf() != JsonType::Object) |
| 88 return Ref(JsonValue(), *this, name); | |
| 89 | |
| 90 auto value = json_object_get(m_handle.get(), name.c_str()); | |
| 91 | |
| 92 json_incref(value); | |
| 93 | |
| 94 return Ref(value, *this, name); | |
| 311 | 95 } |
| 96 | |
| 97 JsonValue JsonObject::operator[](const std::string &name) const | |
| 98 { | |
| 99 if (typeOf() != JsonType::Object) | |
| 314 | 100 return JsonValue(); |
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101 |
| 311 | 102 auto value = json_object_get(m_handle.get(), name.c_str()); |
| 103 | |
| 104 if (value == nullptr) | |
| 314 | 105 return JsonValue(); |
| 311 | 106 |
| 107 json_incref(value); | |
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108 |
| 314 | 109 return JsonValue(value); |
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110 } |
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111 |
| 311 | 112 /* -------------------------------------------------------- |
| 314 | 113 * JsonDocument |
| 311 | 114 * -------------------------------------------------------- */ |
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115 |
| 314 | 116 JsonValue JsonDocument::read(std::string content, int flags) const |
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117 { |
| 311 | 118 json_error_t error; |
| 314 | 119 json_t *json = json_loads(content.c_str(), flags, &error); |
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120 |
| 314 | 121 if (json == nullptr) |
| 122 throw JsonError(error); | |
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123 |
| 314 | 124 return JsonValue(json); |
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125 } |
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126 |
| 314 | 127 JsonValue JsonDocument::read(std::ifstream &stream, int flags) const |
| 128 { | |
| 129 if (!stream.is_open()) | |
| 130 throw JsonError("File not opened"); | |
| 311 | 131 |
| 314 | 132 stream.seekg(0, stream.end); |
| 133 auto length = stream.tellg(); | |
| 134 stream.seekg(0, stream.beg); | |
| 135 | |
| 136 std::string buffer; | |
| 137 buffer.resize(length, ' '); | |
| 138 | |
| 139 stream.read(&buffer[0], length); | |
| 140 stream.close(); | |
| 141 | |
| 142 return read(std::move(buffer), flags); | |
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143 } |
| 311 | 144 |
| 314 | 145 JsonDocument::JsonDocument(std::ifstream &stream, int flags) |
| 146 { | |
| 147 m_value = read(stream, flags); | |
| 148 } | |
| 149 | |
| 150 JsonDocument::JsonDocument(std::ifstream &&stream, int flags) | |
| 311 | 151 { |
| 314 | 152 m_value = read(stream, flags); |
| 311 | 153 } |
| 314 | 154 |
| 155 JsonDocument::JsonDocument(std::string content, int flags) | |
| 156 { | |
| 157 m_value = read(std::move(content), flags); | |
| 158 } |