1 files changed, 42 insertions, 0 deletions
diff --git a/csum-file.h b/csum-file.h
new file mode 100644
index 0000000000..3b540bdc21
--- /dev/null
+++ b/csum-file.h
@@ -0,0 +1,42 @@
+#ifndef CSUM_FILE_H
+#define CSUM_FILE_H
+
+struct progress;
+
+/* A SHA1-protected file */
+struct sha1file {
+	int fd;
+	int check_fd;
+	unsigned int offset;
+	git_SHA_CTX ctx;
+	off_t total;
+	struct progress *tp;
+	const char *name;
+	int do_crc;
+	uint32_t crc32;
+	unsigned char buffer[8192];
+};
+
+/* Checkpoint */
+struct sha1file_checkpoint {
+	off_t offset;
+	git_SHA_CTX ctx;
+};
+
+extern void sha1file_checkpoint(struct sha1file *, struct sha1file_checkpoint *);
+extern int sha1file_truncate(struct sha1file *, struct sha1file_checkpoint *);
+
+/* sha1close flags */
+#define CSUM_CLOSE	1
+#define CSUM_FSYNC	2
+
+extern struct sha1file *sha1fd(int fd, const char *name);
+extern struct sha1file *sha1fd_check(const char *name);
+extern struct sha1file *sha1fd_throughput(int fd, const char *name, struct progress *tp);
+extern int sha1close(struct sha1file *, unsigned char *, unsigned int);
+extern int sha1write(struct sha1file *, void *, unsigned int);
+extern void sha1flush(struct sha1file *f);
+extern void crc32_begin(struct sha1file *);
+extern uint32_t crc32_end(struct sha1file *);
+
+#endif