/*
 * This module implements commands for saving SIM file content in UNIX host
 * files and restoring these backups back to the SIM.
 */

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <pcsclite.h>
#include <winscard.h>
#include "globals.h"

static
savebin_transparent(outf)
	FILE *outf;
{
	unsigned off, cc;
	int rc;

	for (off = 0; off < curfile_total_size; off += cc) {
		cc = curfile_total_size - off;
		if (cc > 256)
			cc = 256;
		rc = readbin_op(off, cc);
		if (rc < 0)
			return(rc);
		fwrite(sim_resp_data, 1, cc, outf);
	}
	return(0);
}

static
savebin_records(outf)
	FILE *outf;
{
	unsigned recno;
	int rc;

	for (recno = 1; recno <= curfile_record_count; recno++) {
		rc = readrec_op(recno, 0x04, curfile_record_len);
		if (rc < 0)
			return(rc);
		fwrite(sim_resp_data, curfile_record_len, 1, outf);
	}
	return(0);
}

cmd_savebin(argc, argv)
	char **argv;
{
	int file_id, rc;
	unsigned readlen;
	FILE *of;

	if (isxdigit(argv[1][0]) && isxdigit(argv[1][1]) &&
	    isxdigit(argv[1][2]) && isxdigit(argv[1][3]) && !argv[1][4])
		file_id = strtoul(argv[1], 0, 16);
	else
		file_id = find_symbolic_file_name(argv[1]);
	if (file_id < 0) {
		fprintf(stderr,
"error: file ID argument is not a hex value or a recognized symbolic name\n");
		return(-1);
	}
	rc = select_op(file_id);
	if (rc < 0)
		return(rc);
	rc = parse_ef_select_response();
	if (rc < 0)
		return(rc);
	of = fopen(argv[2], "w");
	if (!of) {
		perror(argv[2]);
		return(-1);
	}
	switch (curfile_structure) {
	case 0x00:
		/* transparent */
		rc = savebin_transparent(of);
		break;
	case 0x01:
	case 0x03:
		/* record-based */
		rc = savebin_records(of);
		break;
	}
	fclose(of);
	return(rc);
}