/* See LICENSE file for copyright and license details. */
#include "common.h"


int
libpatch_format_rcs_patch(struct libpatch_diff2_printer *printer, struct libpatch_diff2 *diff, size_t difflen,
                          const struct libpatch_file *file1, const struct libpatch_file *file2)
{
	size_t i, j, n, ai, bi, an, bn;

	ai = 0;
	bi = 0;
	for (i = 0; (n = libpatch_next_hunk(diff, difflen, &i, &ai, &bi, &an, &bn, 1));) {
		if (an) {
			printer->put_hunk_head_prefix(printer, "", 0);
			printer->put_hunk_operation(printer, "d", 0, 1);
			printer->put_hunk_start(printer, " ", ai + 1, 1);
			printer->put_hunk_length(printer, " ", an, 1);
			printer->put_hunk_head_suffix(printer, "", 0);
			printer->put_newline(printer);
		}
		if (bn) {
			printer->put_hunk_head_prefix(printer, "", 0);
			printer->put_hunk_operation(printer, "a", 0, 1);
			printer->put_hunk_start(printer, " ", ai + an, 1);
			printer->put_hunk_length(printer, " ", bn, 2);
			printer->put_hunk_head_suffix(printer, "", 0);
			printer->put_newline(printer);
		}

		ai += an;
		if (bn) {
			for (n += i; i < n; i++) {
				for (j = 0; j < diff[i].repetition; j++) {
					if (diff[i].change != LIBPATCH_DIFF2_FILE1_ONLY) {
						printer->put_change_prefix(printer, "", 2, 0, bi);
						printer->put_line(printer, file2->lines[bi++]);
						if (bi < file2->nlines || file2->lf_terminated)
							printer->put_newline(printer);
					}
				}
			}
		}
	}

	(void) file1;
	return 0;
}