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