1 files changed, 58 insertions, 0 deletions
diff --git a/libpatch_format_ed_patch.c b/libpatch_format_ed_patch.c
new file mode 100644
index 0000000..ba9efcb
--- /dev/null
+++ b/libpatch_format_ed_patch.c
@@ -0,0 +1,58 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+int
+libpatch_format_ed_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, bj, an, bn;
+	int stopped;
+
+	ai = file1->nlines;
+	bi = file2->nlines;
+	for (i = difflen; (n = libpatch_previous_hunk(diff, &i, &ai, &bi, &an, &bn, 1));) {
+		printer->put_hunk_head_prefix(printer, "", 0);
+		printer->put_hunk_start(printer, "", ai + (an ? 1U : 0U), 1);
+		if (an > 1)
+			printer->put_hunk_end(printer, ",", ai + an, 1);
+		printer->put_hunk_operation(printer, !bn ? "d" : !an ? "a" : "c", an > 0, bn > 0);
+		printer->put_hunk_head_suffix(printer, "", 0);
+		printer->put_newline(printer);
+
+		if (bn) {
+			bj = bi;
+			stopped = 0;
+			for (; i < n; i++) {
+				for (j = 0; j < diff[i].repetition; j++) {
+					if (diff[i].change != LIBPATCH_DIFF2_FILE1_ONLY) {
+						if (stopped) {
+							stopped = 0;
+							printer->put_end_of_change(printer, "a");
+							printer->put_newline(printer);
+						}
+						printer->put_change_prefix(printer, "", 2, an > 0, bj);
+						if (file2->lines[bj]->len == 1 && file2->lines[bj]->text[0] == '.') {
+							printer->put_syntactical_escape(printer, ".");
+							printer->put_line(printer, file2->lines[bj++]);
+							printer->put_newline(printer);
+							printer->put_end_of_change(printer, ".");
+							printer->put_newline(printer);
+							printer->put_end_of_change(printer, "s/.//");
+							printer->put_newline(printer);
+							stopped = 1;
+						} else {
+							printer->put_line(printer, file2->lines[bj++]);
+							printer->put_newline(printer);
+						}
+					}
+				}
+			}
+			if (!stopped)
+				printer->put_end_of_change(printer, ".");
+			printer->put_newline(printer);
+		}
+	}
+
+	return 0;
+}