295 lines
7.8 KiB
C++
295 lines
7.8 KiB
C++
/*
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* Copyright 2004 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/strings/json.h"
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#include <errno.h>
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#include <limits.h>
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#include <stdlib.h>
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#include "rtc_base/string_encode.h"
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namespace rtc {
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bool GetStringFromJson(const Json::Value& in, std::string* out) {
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if (!in.isString()) {
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if (in.isBool()) {
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*out = rtc::ToString(in.asBool());
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} else if (in.isInt()) {
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*out = rtc::ToString(in.asInt());
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} else if (in.isUInt()) {
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*out = rtc::ToString(in.asUInt());
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} else if (in.isDouble()) {
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*out = rtc::ToString(in.asDouble());
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} else {
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return false;
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}
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} else {
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*out = in.asString();
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}
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return true;
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}
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bool GetIntFromJson(const Json::Value& in, int* out) {
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bool ret;
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if (!in.isString()) {
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ret = in.isConvertibleTo(Json::intValue);
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if (ret) {
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*out = in.asInt();
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}
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} else {
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long val; // NOLINT
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const char* c_str = in.asCString();
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char* end_ptr;
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errno = 0;
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val = strtol(c_str, &end_ptr, 10); // NOLINT
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ret = (end_ptr != c_str && *end_ptr == '\0' && !errno && val >= INT_MIN &&
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val <= INT_MAX);
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*out = val;
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}
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return ret;
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}
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bool GetUIntFromJson(const Json::Value& in, unsigned int* out) {
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bool ret;
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if (!in.isString()) {
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ret = in.isConvertibleTo(Json::uintValue);
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if (ret) {
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*out = in.asUInt();
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}
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} else {
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unsigned long val; // NOLINT
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const char* c_str = in.asCString();
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char* end_ptr;
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errno = 0;
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val = strtoul(c_str, &end_ptr, 10); // NOLINT
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ret = (end_ptr != c_str && *end_ptr == '\0' && !errno && val <= UINT_MAX);
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*out = val;
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}
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return ret;
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}
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bool GetBoolFromJson(const Json::Value& in, bool* out) {
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bool ret;
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if (!in.isString()) {
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ret = in.isConvertibleTo(Json::booleanValue);
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if (ret) {
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*out = in.asBool();
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}
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} else {
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if (in.asString() == "true") {
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*out = true;
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ret = true;
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} else if (in.asString() == "false") {
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*out = false;
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ret = true;
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} else {
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ret = false;
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}
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}
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return ret;
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}
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bool GetDoubleFromJson(const Json::Value& in, double* out) {
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bool ret;
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if (!in.isString()) {
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ret = in.isConvertibleTo(Json::realValue);
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if (ret) {
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*out = in.asDouble();
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}
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} else {
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double val;
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const char* c_str = in.asCString();
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char* end_ptr;
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errno = 0;
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val = strtod(c_str, &end_ptr);
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ret = (end_ptr != c_str && *end_ptr == '\0' && !errno);
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*out = val;
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}
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return ret;
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}
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namespace {
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template <typename T>
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bool JsonArrayToVector(const Json::Value& value,
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bool (*getter)(const Json::Value& in, T* out),
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std::vector<T>* vec) {
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vec->clear();
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if (!value.isArray()) {
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return false;
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}
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for (Json::Value::ArrayIndex i = 0; i < value.size(); ++i) {
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T val;
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if (!getter(value[i], &val)) {
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return false;
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}
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vec->push_back(val);
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}
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return true;
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}
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// Trivial getter helper
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bool GetValueFromJson(const Json::Value& in, Json::Value* out) {
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*out = in;
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return true;
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}
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} // unnamed namespace
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bool JsonArrayToValueVector(const Json::Value& in,
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std::vector<Json::Value>* out) {
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return JsonArrayToVector(in, GetValueFromJson, out);
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}
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bool JsonArrayToIntVector(const Json::Value& in, std::vector<int>* out) {
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return JsonArrayToVector(in, GetIntFromJson, out);
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}
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bool JsonArrayToUIntVector(const Json::Value& in,
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std::vector<unsigned int>* out) {
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return JsonArrayToVector(in, GetUIntFromJson, out);
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}
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bool JsonArrayToStringVector(const Json::Value& in,
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std::vector<std::string>* out) {
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return JsonArrayToVector(in, GetStringFromJson, out);
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}
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bool JsonArrayToBoolVector(const Json::Value& in, std::vector<bool>* out) {
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return JsonArrayToVector(in, GetBoolFromJson, out);
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}
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bool JsonArrayToDoubleVector(const Json::Value& in, std::vector<double>* out) {
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return JsonArrayToVector(in, GetDoubleFromJson, out);
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}
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namespace {
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template <typename T>
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Json::Value VectorToJsonArray(const std::vector<T>& vec) {
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Json::Value result(Json::arrayValue);
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for (size_t i = 0; i < vec.size(); ++i) {
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result.append(Json::Value(vec[i]));
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}
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return result;
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}
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} // unnamed namespace
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Json::Value ValueVectorToJsonArray(const std::vector<Json::Value>& in) {
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return VectorToJsonArray(in);
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}
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Json::Value IntVectorToJsonArray(const std::vector<int>& in) {
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return VectorToJsonArray(in);
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}
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Json::Value UIntVectorToJsonArray(const std::vector<unsigned int>& in) {
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return VectorToJsonArray(in);
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}
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Json::Value StringVectorToJsonArray(const std::vector<std::string>& in) {
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return VectorToJsonArray(in);
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}
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Json::Value BoolVectorToJsonArray(const std::vector<bool>& in) {
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return VectorToJsonArray(in);
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}
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Json::Value DoubleVectorToJsonArray(const std::vector<double>& in) {
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return VectorToJsonArray(in);
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}
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bool GetValueFromJsonArray(const Json::Value& in, size_t n, Json::Value* out) {
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if (!in.isArray() || !in.isValidIndex(static_cast<int>(n))) {
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return false;
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}
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*out = in[static_cast<Json::Value::ArrayIndex>(n)];
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return true;
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}
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bool GetIntFromJsonArray(const Json::Value& in, size_t n, int* out) {
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Json::Value x;
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return GetValueFromJsonArray(in, n, &x) && GetIntFromJson(x, out);
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}
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bool GetUIntFromJsonArray(const Json::Value& in, size_t n, unsigned int* out) {
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Json::Value x;
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return GetValueFromJsonArray(in, n, &x) && GetUIntFromJson(x, out);
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}
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bool GetStringFromJsonArray(const Json::Value& in, size_t n, std::string* out) {
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Json::Value x;
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return GetValueFromJsonArray(in, n, &x) && GetStringFromJson(x, out);
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}
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bool GetBoolFromJsonArray(const Json::Value& in, size_t n, bool* out) {
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Json::Value x;
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return GetValueFromJsonArray(in, n, &x) && GetBoolFromJson(x, out);
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}
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bool GetDoubleFromJsonArray(const Json::Value& in, size_t n, double* out) {
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Json::Value x;
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return GetValueFromJsonArray(in, n, &x) && GetDoubleFromJson(x, out);
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}
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bool GetValueFromJsonObject(const Json::Value& in,
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const std::string& k,
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Json::Value* out) {
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if (!in.isObject() || !in.isMember(k)) {
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return false;
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}
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*out = in[k];
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return true;
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}
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bool GetIntFromJsonObject(const Json::Value& in,
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const std::string& k,
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int* out) {
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Json::Value x;
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return GetValueFromJsonObject(in, k, &x) && GetIntFromJson(x, out);
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}
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bool GetUIntFromJsonObject(const Json::Value& in,
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const std::string& k,
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unsigned int* out) {
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Json::Value x;
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return GetValueFromJsonObject(in, k, &x) && GetUIntFromJson(x, out);
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}
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bool GetStringFromJsonObject(const Json::Value& in,
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const std::string& k,
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std::string* out) {
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Json::Value x;
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return GetValueFromJsonObject(in, k, &x) && GetStringFromJson(x, out);
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}
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bool GetBoolFromJsonObject(const Json::Value& in,
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const std::string& k,
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bool* out) {
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Json::Value x;
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return GetValueFromJsonObject(in, k, &x) && GetBoolFromJson(x, out);
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}
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bool GetDoubleFromJsonObject(const Json::Value& in,
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const std::string& k,
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double* out) {
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Json::Value x;
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return GetValueFromJsonObject(in, k, &x) && GetDoubleFromJson(x, out);
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}
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std::string JsonValueToString(const Json::Value& json) {
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Json::FastWriter w;
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std::string value = w.write(json);
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return value.substr(0, value.size() - 1); // trim trailing newline
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}
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} // namespace rtc
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