/*
 * This module implements the sst command, listing the SIM Service Table
 * in a human-readable, yet very compact form: just a list of activated
 * (or allocated but not activated, specially marked) service numbers.
 */

#include <sys/types.h>
#include <stdio.h>
#include "simresp.h"
#include "curfile.h"
#include "file_id.h"

cmd_sst()
{
	int rc;
	unsigned byte, pos, code, nserv, linelen;

	rc = select_op(DF_GSM);
	if (rc < 0)
		return(rc);
	rc = select_op(EF_SST);
	if (rc < 0)
		return(rc);
	rc = parse_ef_select_response();
	if (rc < 0)
		return(rc);
	if (curfile_structure != 0x00) {
		fprintf(stderr, "error: EF_SST is not transparent\n");
		return(-1);
	}
	if (curfile_total_size < 2) {
		fprintf(stderr,
		"error: EF_SST is shorter than spec minimum of 2 bytes\n");
		return(-1);
	}
	if (curfile_total_size > 256) {
		fprintf(stderr,
			"error: EF_SST is longer than our 256 byte limit\n");
		return(-1);
	}
	rc = readbin_op(0, curfile_total_size);
	if (rc < 0)
		return(rc);
	linelen = 0;
	for (byte = 0, nserv = 1; byte < curfile_total_size; byte++) {
		for (pos = 0; pos < 8; pos += 2, nserv++) {
			code = (sim_resp_data[byte] >> pos) & 3;
			if (!(code & 1))
				continue;
			if (linelen > 73) {
				putchar('\n');
				linelen = 0;
			}
			if (linelen) {
				putchar(' ');
				linelen++;
			}
			linelen += printf("%u", nserv);
			if (!(code & 2)) {
				putchar('^');
				linelen++;
			}
		}
	}
	if (linelen)
		putchar('\n');
	return(0);
}