//Sample code file: var/ndk/webBuildengine/tmp/viewable_samples/bae5da4a-b842-4667-9fdf-ef3d868564d0/intl/utf8/utf8.c

/*************************************************************************

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/**************************************************************************
  UTF8.C
***************************************************************************

  This example shows how to convert text from Unicode to UTF-8 and back to
  demonstrate the use of NWLUnicodeToUTF8Size, NWLUnicodeToUTF8, 
  NWLUTF8ToUnicodeSize, and NWLUTF8ToUnicode.
  
  Uses the Unicode test string "This is a test". First the string is
  converted from Unicode to UTF-8. Then it is converted from UTF-8
  to Unicode. unicmp() is used to verify that the round-trip conversion
  was done correctly.

  Expected Output:
                   NWLUnicodeToUTF8Size() returned 15
                   NWLUnicodeToUTF8() was successful: 'This is a test'
                   NWLUTF8ToUnicodeSize() passed back 30
                   UNLUTF8ToUnicode() was successful

**************************************************************************/

#include <stdio.h>
#include <stdlib.h>

#include <unicode.h>
#include <assert.h>


void main (int argc, char *argv[])
{
   unicode          sourceStr[] = L"This is a test";
   unicode        * uniPtr;
   char           * utf8Ptr;
   nuint            utf8Size;
   nuint            uniSize;
   nint             ccode;


   /* 
    * Convert string from Unicode to UTF-8 
    */
   utf8Size = NWLUnicodeToUTF8Size(sourceStr);
   printf("NWLUnicodeToUTF8Size() returned %d\n", utf8Size);
   
   utf8Ptr = malloc(utf8Size);
   if (NULL == utf8Ptr)
   {
      fprintf(stderr, "Memory allocation error\n");
      exit(1);
   }

   ccode = NWLUnicodeToUTF8(sourceStr, utf8Size, utf8Ptr, &utf8Size);
   assert(0 == ccode);
   printf("NWLUnicodeToUTF8() was successful: '%s'\n", utf8Ptr);


   /* 
    * Convert UTF-8 string to Unicode 
    */
   ccode = NWLUTF8ToUnicodeSize(utf8Ptr, &uniSize);
   assert(0 == ccode);
   printf("NWLUTF8ToUnicodeSize() passed back %d\n", uniSize);

   uniPtr = malloc(uniSize);
   if (NULL == uniPtr)
   {
      fprintf(stderr, "Memory allocation error\n");
      free(utf8Ptr);
      exit(1);
   }

   ccode = NWLUTF8ToUnicode(utf8Ptr, uniSize, uniPtr, &uniSize, NULL);
   assert(0 == ccode);
   assert(unicmp(uniPtr, sourceStr) == 0);   /* Check round-trip conversion */
   printf("NWLUTF8ToUnicode() was successful\n");


   /* 
    * Clean-up 
    */
   free(utf8Ptr);
   free(uniPtr);
}