1 files changed, 24 insertions, 0 deletions
diff --git a/sha1-array.h b/sha1-array.h
new file mode 100644
index 0000000..4499b5d
--- /dev/null
+++ b/sha1-array.h
@@ -0,0 +1,24 @@
+#ifndef SHA1_ARRAY_H
+#define SHA1_ARRAY_H
+
+struct sha1_array {
+	unsigned char (*sha1)[20];
+	int nr;
+	int alloc;
+	int sorted;
+};
+
+#define SHA1_ARRAY_INIT { NULL, 0, 0, 0 }
+
+void sha1_array_append(struct sha1_array *array, const unsigned char *sha1);
+void sha1_array_sort(struct sha1_array *array);
+int sha1_array_lookup(struct sha1_array *array, const unsigned char *sha1);
+void sha1_array_clear(struct sha1_array *array);
+
+typedef void (*for_each_sha1_fn)(const unsigned char sha1[20],
+				 void *data);
+void sha1_array_for_each_unique(struct sha1_array *array,
+				for_each_sha1_fn fn,
+				void *data);
+
+#endif /* SHA1_ARRAY_H */