1 files changed, 42 insertions, 0 deletions
diff --git a/range-diff.h b/range-diff.h
new file mode 100644
index 0000000000..9d39818e34
--- /dev/null
+++ b/range-diff.h
@@ -0,0 +1,42 @@
+#ifndef RANGE_DIFF_H
+#define RANGE_DIFF_H
+
+#include "diff.h"
+#include "strvec.h"
+
+#define RANGE_DIFF_CREATION_FACTOR_DEFAULT 60
+#define RANGE_DIFF_MAX_MEMORY_DEFAULT \
+	(sizeof(void*) >= 8 ? \
+		((size_t)(1024L * 1024L) * (size_t)(4L * 1024L)) : /* 4GB on 64-bit */ \
+		((size_t)(1024L * 1024L) * (size_t)(2L * 1024L)))   /* 2GB on 32-bit */
+
+/*
+ * A much higher value than the default, when we KNOW we are comparing
+ * the same series (e.g., used when format-patch calls range-diff).
+ */
+#define CREATION_FACTOR_FOR_THE_SAME_SERIES 999
+
+struct range_diff_options {
+	int creation_factor;
+	unsigned dual_color:1;
+	unsigned left_only:1, right_only:1;
+	unsigned include_merges:1;
+	size_t max_memory;
+	const struct diff_options *diffopt; /* may be NULL */
+	const struct strvec *other_arg; /* may be NULL */
+};
+
+/*
+ * Compare series of commits in `range1` and `range2`, and emit to the
+ * standard output.
+ */
+int show_range_diff(const char *range1, const char *range2,
+		    struct range_diff_options *opts);
+
+/*
+ * Determine whether the given argument is usable as a range argument of `git
+ * range-diff`, e.g. A..B.
+ */
+int is_range_diff_range(const char *arg);
+
+#endif