henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1 | /* |
| 2 | * libjingle |
| 3 | * Copyright 2004--2005, Google Inc. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions are met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| 9 | * this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * 3. The name of the author may not be used to endorse or promote products |
| 14 | * derived from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| 19 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 20 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 21 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 22 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 23 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 24 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 25 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #include "talk/base/json.h" |
| 29 | |
| 30 | #include <errno.h> |
| 31 | |
| 32 | #include <climits> |
| 33 | #include <cstdlib> |
| 34 | #include <sstream> |
| 35 | |
| 36 | bool GetStringFromJson(const Json::Value& in, std::string* out) { |
| 37 | if (!in.isString()) { |
| 38 | std::ostringstream s; |
| 39 | if (in.isBool()) { |
| 40 | s << std::boolalpha << in.asBool(); |
| 41 | } else if (in.isInt()) { |
| 42 | s << in.asInt(); |
| 43 | } else if (in.isUInt()) { |
| 44 | s << in.asUInt(); |
| 45 | } else if (in.isDouble()) { |
| 46 | s << in.asDouble(); |
| 47 | } else { |
| 48 | return false; |
| 49 | } |
| 50 | *out = s.str(); |
| 51 | } else { |
| 52 | *out = in.asString(); |
| 53 | } |
| 54 | return true; |
| 55 | } |
| 56 | |
| 57 | bool GetIntFromJson(const Json::Value& in, int* out) { |
| 58 | bool ret; |
| 59 | if (!in.isString()) { |
| 60 | ret = in.isConvertibleTo(Json::intValue); |
| 61 | if (ret) { |
| 62 | *out = in.asInt(); |
| 63 | } |
| 64 | } else { |
| 65 | long val; // NOLINT |
| 66 | const char* c_str = in.asCString(); |
| 67 | char* end_ptr; |
| 68 | errno = 0; |
| 69 | val = strtol(c_str, &end_ptr, 10); // NOLINT |
| 70 | ret = (end_ptr != c_str && *end_ptr == '\0' && !errno && |
| 71 | val >= INT_MIN && val <= INT_MAX); |
| 72 | *out = val; |
| 73 | } |
| 74 | return ret; |
| 75 | } |
| 76 | |
| 77 | bool GetUIntFromJson(const Json::Value& in, unsigned int* out) { |
| 78 | bool ret; |
| 79 | if (!in.isString()) { |
| 80 | ret = in.isConvertibleTo(Json::uintValue); |
| 81 | if (ret) { |
| 82 | *out = in.asUInt(); |
| 83 | } |
| 84 | } else { |
| 85 | unsigned long val; // NOLINT |
| 86 | const char* c_str = in.asCString(); |
| 87 | char* end_ptr; |
| 88 | errno = 0; |
| 89 | val = strtoul(c_str, &end_ptr, 10); // NOLINT |
| 90 | ret = (end_ptr != c_str && *end_ptr == '\0' && !errno && |
| 91 | val <= UINT_MAX); |
| 92 | *out = val; |
| 93 | } |
| 94 | return ret; |
| 95 | } |
| 96 | |
| 97 | bool GetBoolFromJson(const Json::Value& in, bool* out) { |
| 98 | bool ret; |
| 99 | if (!in.isString()) { |
| 100 | ret = in.isConvertibleTo(Json::booleanValue); |
| 101 | if (ret) { |
| 102 | *out = in.asBool(); |
| 103 | } |
| 104 | } else { |
| 105 | if (in.asString() == "true") { |
| 106 | *out = true; |
| 107 | ret = true; |
| 108 | } else if (in.asString() == "false") { |
| 109 | *out = false; |
| 110 | ret = true; |
| 111 | } else { |
| 112 | ret = false; |
| 113 | } |
| 114 | } |
| 115 | return ret; |
| 116 | } |
| 117 | |
| 118 | bool GetDoubleFromJson(const Json::Value& in, double* out) { |
| 119 | bool ret; |
| 120 | if (!in.isString()) { |
| 121 | ret = in.isConvertibleTo(Json::realValue); |
| 122 | if (ret) { |
| 123 | *out = in.asDouble(); |
| 124 | } |
| 125 | } else { |
| 126 | double val; |
| 127 | const char* c_str = in.asCString(); |
| 128 | char* end_ptr; |
| 129 | errno = 0; |
| 130 | val = strtod(c_str, &end_ptr); |
| 131 | ret = (end_ptr != c_str && *end_ptr == '\0' && !errno); |
| 132 | *out = val; |
| 133 | } |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | namespace { |
| 138 | template<typename T> |
| 139 | bool JsonArrayToVector(const Json::Value& value, |
| 140 | bool (*getter)(const Json::Value& in, T* out), |
| 141 | std::vector<T> *vec) { |
| 142 | vec->clear(); |
| 143 | if (!value.isArray()) { |
| 144 | return false; |
| 145 | } |
| 146 | |
| 147 | for (Json::Value::ArrayIndex i = 0; i < value.size(); ++i) { |
| 148 | T val; |
| 149 | if (!getter(value[i], &val)) { |
| 150 | return false; |
| 151 | } |
| 152 | vec->push_back(val); |
| 153 | } |
| 154 | |
| 155 | return true; |
| 156 | } |
| 157 | // Trivial getter helper |
| 158 | bool GetValueFromJson(const Json::Value& in, Json::Value* out) { |
| 159 | *out = in; |
| 160 | return true; |
| 161 | } |
| 162 | } // unnamed namespace |
| 163 | |
| 164 | bool JsonArrayToValueVector(const Json::Value& in, |
| 165 | std::vector<Json::Value>* out) { |
| 166 | return JsonArrayToVector(in, GetValueFromJson, out); |
| 167 | } |
| 168 | |
| 169 | bool JsonArrayToIntVector(const Json::Value& in, |
| 170 | std::vector<int>* out) { |
| 171 | return JsonArrayToVector(in, GetIntFromJson, out); |
| 172 | } |
| 173 | |
| 174 | bool JsonArrayToUIntVector(const Json::Value& in, |
| 175 | std::vector<unsigned int>* out) { |
| 176 | return JsonArrayToVector(in, GetUIntFromJson, out); |
| 177 | } |
| 178 | |
| 179 | bool JsonArrayToStringVector(const Json::Value& in, |
| 180 | std::vector<std::string>* out) { |
| 181 | return JsonArrayToVector(in, GetStringFromJson, out); |
| 182 | } |
| 183 | |
| 184 | bool JsonArrayToBoolVector(const Json::Value& in, |
| 185 | std::vector<bool>* out) { |
| 186 | return JsonArrayToVector(in, GetBoolFromJson, out); |
| 187 | } |
| 188 | |
| 189 | bool JsonArrayToDoubleVector(const Json::Value& in, |
| 190 | std::vector<double>* out) { |
| 191 | return JsonArrayToVector(in, GetDoubleFromJson, out); |
| 192 | } |
| 193 | |
| 194 | namespace { |
| 195 | template<typename T> |
| 196 | Json::Value VectorToJsonArray(const std::vector<T>& vec) { |
| 197 | Json::Value result(Json::arrayValue); |
| 198 | for (size_t i = 0; i < vec.size(); ++i) { |
| 199 | result.append(Json::Value(vec[i])); |
| 200 | } |
| 201 | return result; |
| 202 | } |
| 203 | } // unnamed namespace |
| 204 | |
| 205 | Json::Value ValueVectorToJsonArray(const std::vector<Json::Value>& in) { |
| 206 | return VectorToJsonArray(in); |
| 207 | } |
| 208 | |
| 209 | Json::Value IntVectorToJsonArray(const std::vector<int>& in) { |
| 210 | return VectorToJsonArray(in); |
| 211 | } |
| 212 | |
| 213 | Json::Value UIntVectorToJsonArray(const std::vector<unsigned int>& in) { |
| 214 | return VectorToJsonArray(in); |
| 215 | } |
| 216 | |
| 217 | Json::Value StringVectorToJsonArray(const std::vector<std::string>& in) { |
| 218 | return VectorToJsonArray(in); |
| 219 | } |
| 220 | |
| 221 | Json::Value BoolVectorToJsonArray(const std::vector<bool>& in) { |
| 222 | return VectorToJsonArray(in); |
| 223 | } |
| 224 | |
| 225 | Json::Value DoubleVectorToJsonArray(const std::vector<double>& in) { |
| 226 | return VectorToJsonArray(in); |
| 227 | } |
| 228 | |
| 229 | bool GetValueFromJsonArray(const Json::Value& in, size_t n, |
| 230 | Json::Value* out) { |
| 231 | if (!in.isArray() || !in.isValidIndex(static_cast<int>(n))) { |
| 232 | return false; |
| 233 | } |
| 234 | |
| 235 | *out = in[static_cast<Json::Value::ArrayIndex>(n)]; |
| 236 | return true; |
| 237 | } |
| 238 | |
| 239 | bool GetIntFromJsonArray(const Json::Value& in, size_t n, |
| 240 | int* out) { |
| 241 | Json::Value x; |
| 242 | return GetValueFromJsonArray(in, n, &x) && GetIntFromJson(x, out); |
| 243 | } |
| 244 | |
| 245 | bool GetUIntFromJsonArray(const Json::Value& in, size_t n, |
| 246 | unsigned int* out) { |
| 247 | Json::Value x; |
| 248 | return GetValueFromJsonArray(in, n, &x) && GetUIntFromJson(x, out); |
| 249 | } |
| 250 | |
| 251 | bool GetStringFromJsonArray(const Json::Value& in, size_t n, |
| 252 | std::string* out) { |
| 253 | Json::Value x; |
| 254 | return GetValueFromJsonArray(in, n, &x) && GetStringFromJson(x, out); |
| 255 | } |
| 256 | |
| 257 | bool GetBoolFromJsonArray(const Json::Value& in, size_t n, |
| 258 | bool* out) { |
| 259 | Json::Value x; |
| 260 | return GetValueFromJsonArray(in, n, &x) && GetBoolFromJson(x, out); |
| 261 | } |
| 262 | |
| 263 | bool GetDoubleFromJsonArray(const Json::Value& in, size_t n, |
| 264 | double* out) { |
| 265 | Json::Value x; |
| 266 | return GetValueFromJsonArray(in, n, &x) && GetDoubleFromJson(x, out); |
| 267 | } |
| 268 | |
| 269 | bool GetValueFromJsonObject(const Json::Value& in, const std::string& k, |
| 270 | Json::Value* out) { |
| 271 | if (!in.isObject() || !in.isMember(k)) { |
| 272 | return false; |
| 273 | } |
| 274 | |
| 275 | *out = in[k]; |
| 276 | return true; |
| 277 | } |
| 278 | |
| 279 | bool GetIntFromJsonObject(const Json::Value& in, const std::string& k, |
| 280 | int* out) { |
| 281 | Json::Value x; |
| 282 | return GetValueFromJsonObject(in, k, &x) && GetIntFromJson(x, out); |
| 283 | } |
| 284 | |
| 285 | bool GetUIntFromJsonObject(const Json::Value& in, const std::string& k, |
| 286 | unsigned int* out) { |
| 287 | Json::Value x; |
| 288 | return GetValueFromJsonObject(in, k, &x) && GetUIntFromJson(x, out); |
| 289 | } |
| 290 | |
| 291 | bool GetStringFromJsonObject(const Json::Value& in, const std::string& k, |
| 292 | std::string* out) { |
| 293 | Json::Value x; |
| 294 | return GetValueFromJsonObject(in, k, &x) && GetStringFromJson(x, out); |
| 295 | } |
| 296 | |
| 297 | bool GetBoolFromJsonObject(const Json::Value& in, const std::string& k, |
| 298 | bool* out) { |
| 299 | Json::Value x; |
| 300 | return GetValueFromJsonObject(in, k, &x) && GetBoolFromJson(x, out); |
| 301 | } |
| 302 | |
| 303 | bool GetDoubleFromJsonObject(const Json::Value& in, const std::string& k, |
| 304 | double* out) { |
| 305 | Json::Value x; |
| 306 | return GetValueFromJsonObject(in, k, &x) && GetDoubleFromJson(x, out); |
| 307 | } |
| 308 | |
| 309 | std::string JsonValueToString(const Json::Value& json) { |
| 310 | Json::FastWriter w; |
| 311 | std::string value = w.write(json); |
| 312 | return value.substr(0, value.size() - 1); // trim trailing newline |
| 313 | } |