[general] moving ios and android project under ./platform folder

src/mbgl/util/string.cpp

@@ -0,0 +1,92 @@
+#include <mbgl/util/string.hpp>
+
+#include <rapidjson/writer.h>
+#include <rapidjson/stringbuffer.h>
+
+#include <cassert>
+
+namespace mbgl {
+namespace util {
+
+std::string toString(int32_t t) {
+    rapidjson::StringBuffer s;
+    rapidjson::Writer<rapidjson::StringBuffer> writer(s);
+    writer.Int(t);
+    return s.GetString();
+}
+
+std::string toString(uint32_t t) {
+    rapidjson::StringBuffer s;
+    rapidjson::Writer<rapidjson::StringBuffer> writer(s);
+    writer.Uint(t);
+    return s.GetString();
+}
+
+std::string toString(int64_t t) {
+    rapidjson::StringBuffer s;
+    rapidjson::Writer<rapidjson::StringBuffer> writer(s);
+    writer.Int64(t);
+    return s.GetString();
+}
+
+std::string toString(uint64_t t) {
+    rapidjson::StringBuffer s;
+    rapidjson::Writer<rapidjson::StringBuffer> writer(s);
+    writer.Uint64(t);
+    return s.GetString();
+}
+
+std::string toString(double t, bool decimal) {
+    rapidjson::StringBuffer s;
+    rapidjson::Writer<rapidjson::StringBuffer> writer(s);
+    writer.Double(t);
+    std::string data = s.GetString();
+    if (!decimal && data.length() >= 3 && data[data.length() - 1] == '0' && data[data.length() - 2] == '.') {
+        // Remove trailing ".0" for integers
+        data.resize(data.length() - 2);
+    }
+    return data;
+}
+
+std::string toString(const std::exception_ptr& error) {
+    assert(error);
+
+    if (!error) {
+        return "(null)";
+    }
+
+    try {
+        std::rethrow_exception(error);
+    } catch (const std::exception& ex) {
+        return ex.what();
+    } catch (...) {
+        return "Unknown exception type";
+    }
+}
+
+namespace {
+
+template <typename T>
+std::string toPaddedHex(T x) {
+    std::string result;
+    result.resize(sizeof(T) * 2);
+    for (int index = sizeof(T) * 2 - 1; index >= 0; index--) {
+        const int digit = x & 0x0F;
+        result[index] = '0' + digit + (digit > 9 ? 39 : 0);
+        x >>= 4;
+    }
+    return result;
+}
+
+} // namespace
+
+std::string toHex(uint32_t value) {
+    return toPaddedHex(value);
+}
+
+std::string toHex(uint64_t value) {
+    return toPaddedHex(value);
+}
+
+} // namespace util
+} // namespace mbgl