commit d59645ca93e848225789f77b1f84f3f0deced858
from: Neels Hofmeyr <neels@hofmeyr.de>
date: Fri Nov 06 13:29:24 2020 UTC

example for finding plus lines

commit - 67157248154a23138c2b7ff2eebecbdf3d079ef7
commit + d59645ca93e848225789f77b1f84f3f0deced858
blob - 40142164742fb5bb3d4316a5bca80a90d132836c
blob + 1860f72f783037ecbfabf0432313bd8498ff44ac
--- include/diff_main.h
+++ include/diff_main.h
@@ -180,3 +180,6 @@ struct diff_result *diff_main(const struct diff_config
 			      struct diff_data *left,
 			      struct diff_data *right);
 void diff_result_free(struct diff_result *result);
+
+void diff_result_plus_lines(const struct diff_result *result,
+			    void(*plus_lines_cb)(unsigned int first_atom_idx, unsigned int atoms));
blob - 69aea0a6aaf3ddfe78f7567e8a2405ae2d0c81e0
blob + 4eab36b52ec40f795ad60515f5a7ba6374a37835
--- lib/diff_main.c
+++ lib/diff_main.c
@@ -585,7 +585,12 @@ diff_atomize_file(struct diff_data *d,
 	diff_data_init_root(d, f, data, len, diff_flags);
 
 	return config->atomize_func(config->atomize_func_data, d);
+
+}
 
+void print_plus_lines(unsigned int first_atom_idx, unsigned int atoms)
+{
+	printf("+ %u,%u\n", 1 + first_atom_idx, atoms);
 }
 
 struct diff_result *
@@ -616,6 +621,8 @@ diff_main(const struct diff_config *config, struct dif
 	result->rc = diff_run_algo(config->algo, &state);
 	free(state.kd_buf);
 
+	diff_result_plus_lines(result, print_plus_lines);
+
 	return result;
 }
 
@@ -627,3 +634,17 @@ diff_result_free(struct diff_result *result)
 	ARRAYLIST_FREE(result->chunks);
 	free(result);
 }
+
+
+void diff_result_plus_lines(const struct diff_result *result,
+			    void(*plus_lines_cb)(unsigned int first_atom_idx, unsigned int atoms))
+{
+	struct diff_chunk *c;
+	ARRAYLIST_FOREACH(c, result->chunks) {
+		if (c->left_count)
+			continue;
+		if (!c->right_count)
+			continue;
+		plus_lines_cb(diff_atom_root_idx(c->right_start->root, c->right_start), c->right_count);
+	}
+}