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#include <stdio.h>
#include <sys/types.h>
#include <Rectangle.h> /* Rectangle ASN.1 type */
/*
* This is a custom function which writes the
* encoded output into some FILE stream.
*/
static int
write_out(const void *buffer, size_t size, void *app_key) {
FILE *out_fp = app_key;
size_t wrote;
wrote = fwrite(buffer, 1, size, out_fp);
return (wrote == size) ? 0 : -1;
}
int main(int ac, char **av) {
Rectangle_t *rectangle; /* Type to encode */
asn_enc_rval_t ec; /* Encoder return value */
/* Allocate the Rectangle_t */
rectangle = calloc(1, sizeof(Rectangle_t)); /* not malloc! */
if(!rectangle) {
perror("calloc() failed");
exit(71); /* better, EX_OSERR */
}
/*
* Initialize the Rectangle members
*/
/* height */
rectangle->height = 42;
/* width */
rectangle->width = 23;
/* BER encode the data if filename is given */
if(ac < 2) {
fprintf(stderr, "Specify filename for BER output\n");
} else {
const char *filename = av[1];
FILE *fp = fopen(filename, "wb"); /* for BER output */
if(!fp) {
perror(filename);
exit(71); /* better, EX_OSERR */
}
/* Encode the Rectangle type as BER (DER) */
ec = der_encode(&asn_DEF_Rectangle,
rectangle, write_out, fp);
fclose(fp);
if(ec.encoded == -1) {
fprintf(stderr,
"Could not encode Rectangle (at %s)\n",
ec.failed_type ? ec.failed_type->name : "unknown");
exit(65); /* better, EX_DATAERR */
} else {
fprintf(stderr, "Created %s with BER encoded Rectangle\n",
filename);
}
}
/* Also print the constructed Rectangle XER encoded (XML) */
xer_fprint(stdout, &asn_DEF_Rectangle, rectangle);
return 0; /* Encoding finished successfully */
}
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