From 5c46bef7176b6d8c784516eff6cc1915cf9b28a1 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@mapbox.com>
Date: Wed, 28 May 2014 19:57:01 -0700
Subject: [PATCH] fallback to boost::locale on linux

---
 include/llmr/util/utf.hpp | 44 +++++++++++++++++++++++++++++++++++++++
 src/map/tile_parser.cpp   | 11 ++++------
 2 files changed, 48 insertions(+), 7 deletions(-)
 create mode 100644 include/llmr/util/utf.hpp

diff --git a/include/llmr/util/utf.hpp b/include/llmr/util/utf.hpp
new file mode 100644
index 000000000..fb9ab2048
--- /dev/null
+++ b/include/llmr/util/utf.hpp
@@ -0,0 +1,44 @@
+#ifndef LLMR_UTIL_UTF
+#define LLMR_UTIL_UTF
+
+#include <memory>
+
+// g++/libstdc++ is missing c++11 codecvt support
+#ifdef __linux__
+#include <boost/locale.hpp>
+#else
+#include <codecvt>
+#endif
+
+namespace llmr {
+
+namespace util {
+
+#ifdef __linux__
+
+class utf8_to_utf32 {
+ public:
+    explicit utf8_to_utf32()
+        : utf32conv_() {}
+    std::u32string convert(std::string const& utf8) {
+        return boost::locale::conv::utf_to_utf<char32_t>(utf8)
+    }
+};
+#else
+
+class utf8_to_utf32 {
+ public:
+    explicit utf8_to_utf32()
+        : utf32conv_() {}
+    std::u32string convert(std::string const& utf8) {
+        return utf32conv_.from_bytes(utf8);
+    }
+ private:
+    std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> utf32conv_;
+};
+
+#endif
+
+}}
+
+#endif
diff --git a/src/map/tile_parser.cpp b/src/map/tile_parser.cpp
index 7d8323960..70085b309 100644
--- a/src/map/tile_parser.cpp
+++ b/src/map/tile_parser.cpp
@@ -12,8 +12,7 @@
 #include <llmr/text/glyph_store.hpp>
 
 #include <llmr/util/std.hpp>
-
-#include <codecvt>
+#include <llmr/util/utf.hpp>
 
 using namespace llmr;
 
@@ -172,9 +171,7 @@ std::unique_ptr<Bucket> TileParser::createTextBucket(const VectorTileLayer& laye
     std::unique_ptr<TextBucket> bucket = std::make_unique<TextBucket>(
         tile.textVertexBuffer, tile.triangleElementsBuffer, bucket_desc, placement);
 
-
-    std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> ucs4conv;
-
+    util::utf8_to_utf32 ucs4conv;
 
     // Determine and load glyph ranges
     {
@@ -194,7 +191,7 @@ std::unique_ptr<Bucket> TileParser::createTextBucket(const VectorTileLayer& laye
                 continue;
             }
 
-            const std::u32string string = ucs4conv.from_bytes(toString(it_prop->second));
+            const std::u32string string = ucs4conv.convert(toString(it_prop->second));
 
             // Loop through all characters of this text and collect unique codepoints.
             for (uint32_t chr : string) {
@@ -224,7 +221,7 @@ std::unique_ptr<Bucket> TileParser::createTextBucket(const VectorTileLayer& laye
                 continue;
             }
 
-            const std::u32string string = ucs4conv.from_bytes(toString(it_prop->second));
+            const std::u32string string = ucs4conv.convert(toString(it_prop->second));
 
             // TODO: Shape label
             // TODO: Place label