#include <stdio.h>
#include <string.h>
#include <libxml/xmlversion.h>
#include <libxml/encoding.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xpath.h>

int main(int argc, char **argv)
  {
    const char*         instring = "my teststring";
    xmlCharEncodingHandler* encodingHandler = NULL;
    xmlCharEncoding     encoder;
    int                 insize,
                        outsize,
                        ret,
                        tmp;
    char*               convertbuffer = NULL;

    encoder = xmlParseCharEncoding("ISO-8859-1");
    if (encoder <= 0)
      {
        fprintf(stderr, "no encoder\n");
        return 1;
      }

    encodingHandler = xmlGetCharEncodingHandler(encoder);
    if (!encodingHandler)
      {
        fprintf(stderr, "no encodingHandler\n");
        return 1;
      }

    insize = strlen((char*)instring) + 1;
    outsize = insize * 2 - 1;
    convertbuffer = malloc(outsize);

    tmp = insize - 1;
    ret = encodingHandler -> input(
        (unsigned char*)convertbuffer, &outsize,
        (unsigned char*)instring, &tmp);
    if (ret <= 0 || tmp != insize - 1)
      {
        fprintf(stderr, "bad encoding result: %d\n", ret);
        return 1;
      }

    free(convertbuffer);

    xmlCharEncCloseFunc(encodingHandler);

    return 0;
  }