1 files changed, 97 insertions, 0 deletions
diff --git a/third_party/git/fsck.h b/third_party/git/fsck.h
new file mode 100644
index 000000000000..69cf715e798c
--- /dev/null
+++ b/third_party/git/fsck.h
@@ -0,0 +1,97 @@
+#ifndef GIT_FSCK_H
+#define GIT_FSCK_H
+
+#include "oidset.h"
+
+#define FSCK_ERROR 1
+#define FSCK_WARN 2
+#define FSCK_IGNORE 3
+
+struct fsck_options;
+struct object;
+
+void fsck_set_msg_type(struct fsck_options *options,
+		const char *msg_id, const char *msg_type);
+void fsck_set_msg_types(struct fsck_options *options, const char *values);
+int is_valid_msg_type(const char *msg_id, const char *msg_type);
+
+/*
+ * callback function for fsck_walk
+ * type is the expected type of the object or OBJ_ANY
+ * the return value is:
+ *     0	everything OK
+ *     <0	error signaled and abort
+ *     >0	error signaled and do not abort
+ */
+typedef int (*fsck_walk_func)(struct object *obj, int type, void *data, struct fsck_options *options);
+
+/* callback for fsck_object, type is FSCK_ERROR or FSCK_WARN */
+typedef int (*fsck_error)(struct fsck_options *o,
+			  const struct object_id *oid, enum object_type object_type,
+			  int msg_type, const char *message);
+
+int fsck_error_function(struct fsck_options *o,
+			const struct object_id *oid, enum object_type object_type,
+			int msg_type, const char *message);
+
+struct fsck_options {
+	fsck_walk_func walk;
+	fsck_error error_func;
+	unsigned strict:1;
+	int *msg_type;
+	struct oidset skiplist;
+	kh_oid_map_t *object_names;
+};
+
+#define FSCK_OPTIONS_DEFAULT { NULL, fsck_error_function, 0, NULL, OIDSET_INIT }
+#define FSCK_OPTIONS_STRICT { NULL, fsck_error_function, 1, NULL, OIDSET_INIT }
+
+/* descend in all linked child objects
+ * the return value is:
+ *    -1	error in processing the object
+ *    <0	return value of the callback, which lead to an abort
+ *    >0	return value of the first signaled error >0 (in the case of no other errors)
+ *    0		everything OK
+ */
+int fsck_walk(struct object *obj, void *data, struct fsck_options *options);
+
+/*
+ * Blob objects my pass a NULL data pointer, which indicates they are too large
+ * to fit in memory. All other types must pass a real buffer.
+ */
+int fsck_object(struct object *obj, void *data, unsigned long size,
+	struct fsck_options *options);
+
+/*
+ * Some fsck checks are context-dependent, and may end up queued; run this
+ * after completing all fsck_object() calls in order to resolve any remaining
+ * checks.
+ */
+int fsck_finish(struct fsck_options *options);
+
+/*
+ * Subsystem for storing human-readable names for each object.
+ *
+ * If fsck_enable_object_names() has not been called, all other functions are
+ * noops.
+ *
+ * Use fsck_put_object_name() to seed initial names (e.g. from refnames); the
+ * fsck code will extend that while walking trees, etc.
+ *
+ * Use fsck_get_object_name() to get a single name (or NULL if none). Or the
+ * more convenient describe_object(), which always produces an output string
+ * with the oid combined with the name (if any). Note that the return value
+ * points to a rotating array of static buffers, and may be invalidated by a
+ * subsequent call.
+ */
+void fsck_enable_object_names(struct fsck_options *options);
+const char *fsck_get_object_name(struct fsck_options *options,
+				 const struct object_id *oid);
+__attribute__((format (printf,3,4)))
+void fsck_put_object_name(struct fsck_options *options,
+			  const struct object_id *oid,
+			  const char *fmt, ...);
+const char *fsck_describe_object(struct fsck_options *options,
+				 const struct object_id *oid);
+
+#endif