Function _hx_utf8_to_utf16

src/String.cpp:1529–1570

#ifdef HX_SMART_STRINGS
String _hx_utf8_to_utf16(const unsigned char *ptr, int inUtf8Len, bool addHash)
{
   unsigned int hash = 0;
   if (addHash)
      for(int i=0;i<inUtf8Len;i++)
         hash = hash*223 + ptr[i];

   int char16Count = 0;
   const unsigned char *u = ptr;
   const unsigned char *end = ptr + inUtf8Len;
   while(u<end)
   {
      int code = DecodeAdvanceUTF8(u,end);
      char16Count += UTF16BytesCheck(code);
   }

   int allocSize = 2*(char16Count+1);
   if (addHash)
      allocSize += sizeof(int);
   char16_t *str = (char16_t *)NewGCPrivate(0,allocSize);

   u = ptr;
   char16_t *o = str;
   while(u<end)
   {
      int code = DecodeAdvanceUTF8(u,end);
      Char16AdvanceSet(o,code);
   }
   if (addHash)
   {
      #ifdef EMSCRIPTEN
         *((emscripten_align1_int *)(str+char16Count+1) ) = hash;
      #else
         *((unsigned int *)(str+char16Count+1) ) = hash;
      #endif
      ((unsigned int *)(str))[-1] |= HX_GC_STRING_HASH | HX_GC_STRING_CHAR16_T;
   }
   else
      ((unsigned int *)(str))[-1] |= HX_GC_STRING_CHAR16_T;

   return String(str, char16Count);
}
#endif