Add talk/base/json.cc
git-svn-id: http://libjingle.googlecode.com/svn/trunk@74 dd674b97-3498-5ee5-1854-bdd07cd0ff33
diff --git a/talk/base/json.cc b/talk/base/json.cc
new file mode 100644
index 0000000..1c84b26
--- /dev/null
+++ b/talk/base/json.cc
@@ -0,0 +1,217 @@
+/*
+ * libjingle
+ * Copyright 2004--2005, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "talk/base/json.h"
+
+#include <errno.h>
+
+#include <climits>
+#include <cstdlib>
+#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 GetValueFromJsonArray(const Json::Value& in, size_t n,
+ Json::Value* out) {
+ if (!in.isArray() || !in.isValidIndex(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 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);
+}
+
+Json::Value StringVectorToJsonValue(const std::vector<std::string>& strings) {
+ Json::Value result(Json::arrayValue);
+ for (size_t i = 0; i < strings.size(); ++i) {
+ result.append(Json::Value(strings[i]));
+ }
+ return result;
+}
+
+bool JsonValueToStringVector(const Json::Value& value,
+ std::vector<std::string> *strings) {
+ strings->clear();
+ if (!value.isArray()) {
+ return false;
+ }
+
+ for (Json::Value::ArrayIndex i = 0; i < value.size(); ++i) {
+ if (value[i].isString()) {
+ strings->push_back(value[i].asString());
+ } else {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+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
+}
diff --git a/talk/base/json.h b/talk/base/json.h
new file mode 100644
index 0000000..73d0f69
--- /dev/null
+++ b/talk/base/json.h
@@ -0,0 +1,80 @@
+/*
+ * libjingle
+ * Copyright 2004--2005, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef TALK_BASE_JSON_H_
+#define TALK_BASE_JSON_H_
+
+#include <string>
+#include <vector>
+
+#include "third_party/jsoncpp/json.h"
+
+// TODO: Move to talk_base namespace
+
+///////////////////////////////////////////////////////////////////////////////
+// JSON Helpers
+///////////////////////////////////////////////////////////////////////////////
+
+// Robust conversion operators, better than the ones in JsonCpp.
+bool GetIntFromJson(const Json::Value& in, int* out);
+bool GetUIntFromJson(const Json::Value& in, unsigned int* out);
+bool GetStringFromJson(const Json::Value& in, std::string* out);
+bool GetBoolFromJson(const Json::Value& in, bool* out);
+
+// Pull values out of a JSON array.
+bool GetValueFromJsonArray(const Json::Value& in, size_t n,
+ Json::Value* out);
+bool GetIntFromJsonArray(const Json::Value& in, size_t n,
+ int* out);
+bool GetUIntFromJsonArray(const Json::Value& in, size_t n,
+ unsigned int* out);
+bool GetStringFromJsonArray(const Json::Value& in, size_t n,
+ std::string* out);
+bool GetBoolFromJsonArray(const Json::Value& in, size_t n,
+ bool* out);
+
+// Pull values out of a JSON object.
+bool GetValueFromJsonObject(const Json::Value& in, const std::string& k,
+ Json::Value* out);
+bool GetIntFromJsonObject(const Json::Value& in, const std::string& k,
+ int* out);
+bool GetUIntFromJsonObject(const Json::Value& in, const std::string& k,
+ unsigned int* out);
+bool GetStringFromJsonObject(const Json::Value& in, const std::string& k,
+ std::string* out);
+bool GetBoolFromJsonObject(const Json::Value& in, const std::string& k,
+ bool* out);
+
+// Converts vectors of strings to/from JSON arrays.
+Json::Value StringVectorToJsonValue(const std::vector<std::string>& strings);
+bool JsonValueToStringVector(const Json::Value& value,
+ std::vector<std::string> *strings);
+
+// Writes out a Json value as a string.
+std::string JsonValueToString(const Json::Value& json);
+
+#endif // TALK_BASE_JSON_H_
diff --git a/talk/libjingle.scons b/talk/libjingle.scons
index 44259de..423ae41 100644
--- a/talk/libjingle.scons
+++ b/talk/libjingle.scons
@@ -117,6 +117,7 @@
"base/httpclient.cc",
"base/httpcommon.cc",
"base/httprequest.cc",
+ "base/json.cc",
"base/logging.cc",
"base/md5c.c",
"base/messagehandler.cc",
