Tweak GetGlyphRangesJapanese() to it is easier to modify

imgui_draw.cpp

@@ -1533,25 +1533,27 @@ const ImWchar*  ImFontAtlas::GetGlyphRangesJapanese()
         19,3,8,0,0,0,4,4,16,0,4,1,5,1,3,0,3,4,6,2,17,10,10,31,6,4,3,6,10,126,7,3,2,2,0,9,0,0,5,20,13,0,15,0,6,0,2,5,8,64,50,3,2,12,2,9,0,0,11,8,20,
         109,2,18,23,0,0,9,61,3,0,28,41,77,27,19,17,81,5,2,14,5,83,57,252,14,154,263,14,20,8,13,6,57,39,38,
     };
-    static int ranges_unpacked = false;
-    static ImWchar ranges[8 + IM_ARRAYSIZE(offsets_from_0x4E00)*2 + 1] =
+    static ImWchar base_ranges[] =
     {
         0x0020, 0x00FF, // Basic Latin + Latin Supplement
         0x3000, 0x30FF, // Punctuations, Hiragana, Katakana
         0x31F0, 0x31FF, // Katakana Phonetic Extensions
         0xFF00, 0xFFEF, // Half-width characters
     };
-    if (!ranges_unpacked)
+    static bool full_ranges_unpacked = false;
+    static ImWchar full_ranges[IM_ARRAYSIZE(base_ranges) + IM_ARRAYSIZE(offsets_from_0x4E00)*2 + 1];
+    if (!full_ranges_unpacked)
     {
         // Unpack
         int codepoint = 0x4e00;
-        ImWchar* dst = &ranges[8];
+        memcpy(full_ranges, base_ranges, sizeof(base_ranges));
+        ImWchar* dst = full_ranges + IM_ARRAYSIZE(base_ranges);;
         for (int n = 0; n < IM_ARRAYSIZE(offsets_from_0x4E00); n++, dst += 2)
             dst[0] = dst[1] = (ImWchar)(codepoint += (offsets_from_0x4E00[n] + 1));
         dst[0] = 0;
-        ranges_unpacked = true;
+        full_ranges_unpacked = true;
     }
-    return &ranges[0];
+    return &full_ranges[0];
 }
 
 const ImWchar*  ImFontAtlas::GetGlyphRangesCyrillic()