/** * apr tutorial sample code * http://dev.ariel-networks.com/apr/ */#ifdef HAVE_CONFIG_H#include <config.h>#endif#include <stdio.h>#include <stdlib.h>#include <assert.h>#include <apr_general.h>#include <apr_base64.h>/** * base64 sample code * @remark Error checks omitted */int main(int argc, const char *argv[]){    apr_pool_t *mp;    const char orig[] = "abcdefghijklmn";    char *encbuf;    char *decbuf;    int elen;    int dlen;            apr_initialize();    apr_pool_create(&mp, NULL);    /* get the length of encoded string */    elen = apr_base64_encode_len(strlen(orig));    encbuf = apr_palloc(mp, elen);    apr_base64_encode(encbuf, orig, strlen(orig));    printf("base64 encoded string: %s, len = %d\n", encbuf, elen);    /* get the length of decoded string */    dlen = apr_base64_decode_len(encbuf);    decbuf = apr_palloc(mp, dlen);    apr_base64_decode(decbuf, encbuf);    printf("decoded string: %s, len = %d\n", decbuf, dlen);    apr_terminate();    return 0;}