Adds a modified copy of talk/base to webrtc/base. It is the first step in
migrating talk/base to webrtc/base.
BUG=N/A
R=niklas.enbom@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/17479005
git-svn-id: http://webrtc.googlecode.com/svn/trunk@6129 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/base/json.cc b/webrtc/base/json.cc
new file mode 100644
index 0000000..49a051c
--- /dev/null
+++ b/webrtc/base/json.cc
@@ -0,0 +1,296 @@
+/*
+ * 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 "webrtc/base/json.h"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+
+#include <sstream>
+
+bool GetStringFromJson(const Json::Value& in, std::string* out) {
+ if (!in.isString()) {
+ std::ostringstream s;
+ if (in.isBool()) {
+ s << std::boolalpha << in.asBool();
+ } else if (in.isInt()) {
+ s << in.asInt();
+ } else if (in.isUInt()) {
+ s << in.asUInt();
+ } else if (in.isDouble()) {
+ s << in.asDouble();
+ } else {
+ return false;
+ }
+ *out = s.str();
+ } 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, const std::string& k,
+ Json::Value* out) {
+ if (!in.isObject() || !in.isMember(k)) {
+ return false;
+ }
+
+ *out = in[k];
+ return true;
+}
+
+bool GetIntFromJsonObject(const Json::Value& in, const std::string& k,
+ int* out) {
+ Json::Value x;
+ return GetValueFromJsonObject(in, k, &x) && GetIntFromJson(x, out);
+}
+
+bool GetUIntFromJsonObject(const Json::Value& in, const std::string& k,
+ unsigned int* out) {
+ Json::Value x;
+ return GetValueFromJsonObject(in, k, &x) && GetUIntFromJson(x, out);
+}
+
+bool GetStringFromJsonObject(const Json::Value& in, const std::string& k,
+ std::string* out) {
+ Json::Value x;
+ return GetValueFromJsonObject(in, k, &x) && GetStringFromJson(x, out);
+}
+
+bool GetBoolFromJsonObject(const Json::Value& in, const std::string& k,
+ bool* out) {
+ Json::Value x;
+ return GetValueFromJsonObject(in, k, &x) && GetBoolFromJson(x, out);
+}
+
+bool GetDoubleFromJsonObject(const Json::Value& in, const std::string& k,
+ double* out) {
+ Json::Value x;
+ return GetValueFromJsonObject(in, k, &x) && GetDoubleFromJson(x, out);
+}
+
+std::string JsonValueToString(const Json::Value& json) {
+ Json::FastWriter w;
+ std::string value = w.write(json);
+ return value.substr(0, value.size() - 1); // trim trailing newline
+}