[core] refactor util::toString to use RapidJSON's stringification

1 files changed, 55 insertions, 7 deletions

diff --git a/src/mbgl/util/string.cpp b/src/mbgl/util/string.cpp
index 06ccb56968..2f737e7436 100644
--- a/src/mbgl/util/string.cpp
+++ b/src/mbgl/util/string.cpp
@@ -1,19 +1,67 @@
 #include <mbgl/util/string.hpp>
-#include <mbgl/util/dtoa.hpp>
+
+#include <rapidjson/writer.h>
+#include <rapidjson/stringbuffer.h>
+
+#include <cassert>
 
 namespace mbgl {
 namespace util {
 
-std::string toString(float num, bool decimal) {
-    return dtoa(num, decimal);
+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(double num, bool decimal) {
-    return dtoa(num, decimal);
+std::string toString(int64_t t) {
+    rapidjson::StringBuffer s;
+    rapidjson::Writer<rapidjson::StringBuffer> writer(s);
+    writer.Int64(t);
+    return s.GetString();
 }
 
-std::string toString(long double num, bool decimal) {
-    return dtoa(num, decimal);
+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(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 {