object-file.h: move declarations for object-file.c functions from cache.h

Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

57 files changed, 184 insertions, 123 deletions

diff --git a/apply.c b/apply.c
index 7e40f53..2868cef 100644
--- a/apply.c
+++ b/apply.c
@@ -23,6 +23,7 @@
 #include "ll-merge.h"
 #include "lockfile.h"
 #include "object-name.h"
+#include "object-file.h"
 #include "parse-options.h"
 #include "quote.h"
 #include "rerere.h"
diff --git a/builtin/bugreport.c b/builtin/bugreport.c
index 52955e1..03fb053 100644
--- a/builtin/bugreport.c
+++ b/builtin/bugreport.c
@@ -8,6 +8,7 @@
 #include "hook.h"
 #include "hook-list.h"
 #include "diagnose.h"
+#include "object-file.h"
 #include "setup.h"
 #include "wrapper.h"
 
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 60b7a55..0bafc14 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -20,6 +20,7 @@
 #include "tree-walk.h"
 #include "oid-array.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "replace-object.h"
diff --git a/builtin/clone.c b/builtin/clone.c
index f1e8aa3..c7fdffb 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -21,6 +21,7 @@
 #include "fetch-pack.h"
 #include "refs.h"
 #include "refspec.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "tree.h"
 #include "tree-walk.h"
diff --git a/builtin/credential-cache--daemon.c b/builtin/credential-cache--daemon.c
index 62c09a2..4e571d9 100644
--- a/builtin/credential-cache--daemon.c
+++ b/builtin/credential-cache--daemon.c
@@ -2,6 +2,7 @@
 #include "abspath.h"
 #include "alloc.h"
 #include "gettext.h"
+#include "object-file.h"
 #include "parse-options.h"
 
 #ifndef NO_UNIX_SOCKETS
diff --git a/builtin/diagnose.c b/builtin/diagnose.c
index 0f8b649..4f22eb2 100644
--- a/builtin/diagnose.c
+++ b/builtin/diagnose.c
@@ -1,6 +1,7 @@
 #include "builtin.h"
 #include "abspath.h"
 #include "gettext.h"
+#include "object-file.h"
 #include "parse-options.h"
 #include "diagnose.h"
 
diff --git a/builtin/difftool.c b/builtin/difftool.c
index e010a21..3ffb052 100644
--- a/builtin/difftool.c
+++ b/builtin/difftool.c
@@ -25,6 +25,7 @@
 #include "strvec.h"
 #include "strbuf.h"
 #include "lockfile.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "dir.h"
 #include "entry.h"
diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index 0bb779d..c7835ea 100644
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -10,6 +10,7 @@
 #include "hex.h"
 #include "refs.h"
 #include "refspec.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "commit.h"
 #include "object.h"
diff --git a/builtin/fast-import.c b/builtin/fast-import.c
index 31b8732..9f90f5b 100644
--- a/builtin/fast-import.c
+++ b/builtin/fast-import.c
@@ -19,6 +19,7 @@
 #include "dir.h"
 #include "run-command.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "mem-pool.h"
diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index 60e5a10..664ac1e 100644
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -2,6 +2,7 @@
 #include "alloc.h"
 #include "gettext.h"
 #include "hex.h"
+#include "object-file.h"
 #include "pkt-line.h"
 #include "fetch-pack.h"
 #include "remote.h"
diff --git a/builtin/fsck.c b/builtin/fsck.c
index 04bc71d..35a6de3 100644
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -19,6 +19,7 @@
 #include "streaming.h"
 #include "decorate.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "replace-object.h"
diff --git a/builtin/gc.c b/builtin/gc.c
index 000a2ef..b95154f 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -25,6 +25,7 @@
 #include "commit.h"
 #include "commit-graph.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "pack.h"
 #include "pack-objects.h"
diff --git a/builtin/grep.c b/builtin/grep.c
index f66e143..fb11be6 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -26,6 +26,7 @@
 #include "setup.h"
 #include "submodule.h"
 #include "submodule-config.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "packfile.h"
diff --git a/builtin/hash-object.c b/builtin/hash-object.c
index a15fe4f..a380121 100644
--- a/builtin/hash-object.c
+++ b/builtin/hash-object.c
@@ -9,6 +9,7 @@
 #include "config.h"
 #include "gettext.h"
 #include "hex.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "blob.h"
 #include "quote.h"
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 5adfb25..0f59cf8 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -18,6 +18,7 @@
 #include "thread-utils.h"
 #include "packfile.h"
 #include "pack-revindex.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "oid-array.h"
 #include "replace-object.h"
diff --git a/builtin/init-db.c b/builtin/init-db.c
index ba6e0b2..6183f3f 100644
--- a/builtin/init-db.c
+++ b/builtin/init-db.c
@@ -11,6 +11,7 @@
 #include "refs.h"
 #include "builtin.h"
 #include "exec-cmd.h"
+#include "object-file.h"
 #include "parse-options.h"
 #include "setup.h"
 #include "worktree.h"
diff --git a/builtin/log.c b/builtin/log.c
index 5cdc227..b6246c7 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -12,6 +12,7 @@
 #include "gettext.h"
 #include "hex.h"
 #include "refs.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "color.h"
diff --git a/builtin/mktag.c b/builtin/mktag.c
index f9d9a38..f33d267 100644
--- a/builtin/mktag.c
+++ b/builtin/mktag.c
@@ -4,6 +4,7 @@
 #include "parse-options.h"
 #include "tag.h"
 #include "replace-object.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "fsck.h"
 #include "config.h"
diff --git a/builtin/mv.c b/builtin/mv.c
index 8f7770a..32935af 100644
--- a/builtin/mv.c
+++ b/builtin/mv.c
@@ -11,6 +11,7 @@
 #include "config.h"
 #include "environment.h"
 #include "gettext.h"
+#include "object-file.h"
 #include "pathspec.h"
 #include "lockfile.h"
 #include "dir.h"
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 69c6542..68c914a 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -33,6 +33,7 @@
 #include "strvec.h"
 #include "list.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "replace-object.h"
 #include "dir.h"
diff --git a/builtin/prune.c b/builtin/prune.c
index 0989183..5dc9b20 100644
--- a/builtin/prune.c
+++ b/builtin/prune.c
@@ -11,6 +11,7 @@
 #include "progress.h"
 #include "prune-packed.h"
 #include "replace-object.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "shallow.h"
diff --git a/builtin/rebase.c b/builtin/rebase.c
index ff5dd77..34fea4d 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -21,6 +21,7 @@
 #include "cache-tree.h"
 #include "unpack-trees.h"
 #include "lockfile.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "parse-options.h"
 #include "commit.h"
diff --git a/builtin/replace.c b/builtin/replace.c
index 134f738..f4b3a8e 100644
--- a/builtin/replace.c
+++ b/builtin/replace.c
@@ -17,6 +17,7 @@
 #include "refs.h"
 #include "parse-options.h"
 #include "run-command.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "replace-object.h"
diff --git a/builtin/rev-list.c b/builtin/rev-list.c
index c17f028..6dc8be4 100644
--- a/builtin/rev-list.c
+++ b/builtin/rev-list.c
@@ -11,6 +11,7 @@
 #include "list-objects-filter-options.h"
 #include "object.h"
 #include "object-name.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "pack.h"
 #include "pack-bitmap.h"
diff --git a/builtin/sparse-checkout.c b/builtin/sparse-checkout.c
index 34b9d92..4de37d0 100644
--- a/builtin/sparse-checkout.c
+++ b/builtin/sparse-checkout.c
@@ -4,6 +4,7 @@
 #include "dir.h"
 #include "environment.h"
 #include "gettext.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "parse-options.h"
 #include "pathspec.h"
diff --git a/builtin/submodule--helper.c b/builtin/submodule--helper.c
index 1f087d7..5d999f8 100644
--- a/builtin/submodule--helper.c
+++ b/builtin/submodule--helper.c
@@ -24,6 +24,7 @@
 #include "revision.h"
 #include "diffcore.h"
 #include "diff.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "advice.h"
diff --git a/builtin/update-index.c b/builtin/update-index.c
index 03cda5e..33b00ce 100644
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -15,6 +15,7 @@
 #include "cache-tree.h"
 #include "tree-walk.h"
 #include "builtin.h"
+#include "object-file.h"
 #include "refs.h"
 #include "resolve-undo.h"
 #include "parse-options.h"
diff --git a/builtin/worktree.c b/builtin/worktree.c
index 69132bb..0621f6f 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -7,6 +7,7 @@
 #include "environment.h"
 #include "gettext.h"
 #include "hex.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "parse-options.h"
 #include "strvec.h"
diff --git a/bulk-checkin.c b/bulk-checkin.c
index 6362b6a..af15f8a 100644
--- a/bulk-checkin.c
+++ b/bulk-checkin.c
@@ -15,6 +15,7 @@
 #include "string-list.h"
 #include "tmp-objdir.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-store.h"
 
 static int odb_transaction_nesting;
diff --git a/cache-tree.c b/cache-tree.c
index 39f0c74..ebfe649 100644
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -7,6 +7,7 @@
 #include "tree-walk.h"
 #include "cache-tree.h"
 #include "bulk-checkin.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "replace-object.h"
 #include "promisor-remote.h"
diff --git a/cache.h b/cache.h
index c06778b..89987cc 100644
--- a/cache.h
+++ b/cache.h
@@ -3,7 +3,6 @@
 
 #include "git-compat-util.h"
 #include "strbuf.h"
-#include "git-zlib.h"
 #include "hashmap.h"
 #include "list.h"
 #include "gettext.h"
@@ -596,13 +595,6 @@ int has_racy_timestamp(struct index_state *istate);
 int ie_match_stat(struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
 int ie_modified(struct index_state *, const struct cache_entry *, struct stat *, unsigned int);
 
-#define HASH_WRITE_OBJECT 1
-#define HASH_FORMAT_CHECK 2
-#define HASH_RENORMALIZE  4
-#define HASH_SILENT 8
-int index_fd(struct index_state *istate, struct object_id *oid, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
-int index_path(struct index_state *istate, struct object_id *oid, const char *path, struct stat *st, unsigned flags);
-
 /*
  * Record to sd the data from st that we use to check whether a file
  * might have changed.
@@ -664,107 +656,6 @@ extern int quote_path_fully;
 #define DATA_CHANGED    0x0020
 #define TYPE_CHANGED    0x0040
 
-/*
- * Create the directory containing the named path, using care to be
- * somewhat safe against races. Return one of the scld_error values to
- * indicate success/failure. On error, set errno to describe the
- * problem.
- *
- * SCLD_VANISHED indicates that one of the ancestor directories of the
- * path existed at one point during the function call and then
- * suddenly vanished, probably because another process pruned the
- * directory while we were working.  To be robust against this kind of
- * race, callers might want to try invoking the function again when it
- * returns SCLD_VANISHED.
- *
- * safe_create_leading_directories() temporarily changes path while it
- * is working but restores it before returning.
- * safe_create_leading_directories_const() doesn't modify path, even
- * temporarily. Both these variants adjust the permissions of the
- * created directories to honor core.sharedRepository, so they are best
- * suited for files inside the git dir. For working tree files, use
- * safe_create_leading_directories_no_share() instead, as it ignores
- * the core.sharedRepository setting.
- */
-enum scld_error {
-	SCLD_OK = 0,
-	SCLD_FAILED = -1,
-	SCLD_PERMS = -2,
-	SCLD_EXISTS = -3,
-	SCLD_VANISHED = -4
-};
-enum scld_error safe_create_leading_directories(char *path);
-enum scld_error safe_create_leading_directories_const(const char *path);
-enum scld_error safe_create_leading_directories_no_share(char *path);
-
-int mkdir_in_gitdir(const char *path);
-
-int git_open_cloexec(const char *name, int flags);
-#define git_open(name) git_open_cloexec(name, O_RDONLY)
-
-/**
- * unpack_loose_header() initializes the data stream needed to unpack
- * a loose object header.
- *
- * Returns:
- *
- * - ULHR_OK on success
- * - ULHR_BAD on error
- * - ULHR_TOO_LONG if the header was too long
- *
- * It will only parse up to MAX_HEADER_LEN bytes unless an optional
- * "hdrbuf" argument is non-NULL. This is intended for use with
- * OBJECT_INFO_ALLOW_UNKNOWN_TYPE to extract the bad type for (error)
- * reporting. The full header will be extracted to "hdrbuf" for use
- * with parse_loose_header(), ULHR_TOO_LONG will still be returned
- * from this function to indicate that the header was too long.
- */
-enum unpack_loose_header_result {
-	ULHR_OK,
-	ULHR_BAD,
-	ULHR_TOO_LONG,
-};
-enum unpack_loose_header_result unpack_loose_header(git_zstream *stream,
-						    unsigned char *map,
-						    unsigned long mapsize,
-						    void *buffer,
-						    unsigned long bufsiz,
-						    struct strbuf *hdrbuf);
-
-/**
- * parse_loose_header() parses the starting "<type> <len>\0" of an
- * object. If it doesn't follow that format -1 is returned. To check
- * the validity of the <type> populate the "typep" in the "struct
- * object_info". It will be OBJ_BAD if the object type is unknown. The
- * parsed <len> can be retrieved via "oi->sizep", and from there
- * passed to unpack_loose_rest().
- */
-struct object_info;
-int parse_loose_header(const char *hdr, struct object_info *oi);
-
-/**
- * With in-core object data in "buf", rehash it to make sure the
- * object name actually matches "oid" to detect object corruption.
- *
- * A negative value indicates an error, usually that the OID is not
- * what we expected, but it might also indicate another error.
- */
-int check_object_signature(struct repository *r, const struct object_id *oid,
-			   void *map, unsigned long size,
-			   enum object_type type);
-
-/**
- * A streaming version of check_object_signature().
- * Try reading the object named with "oid" using
- * the streaming interface and rehash it to do the same.
- */
-int stream_object_signature(struct repository *r, const struct object_id *oid);
-
-int finalize_object_file(const char *tmpfile, const char *filename);
-
-/* Helper to check and "touch" a file */
-int check_and_freshen_file(const char *fn, int freshen);
-
 int base_name_compare(const char *name1, size_t len1, int mode1,
 		      const char *name2, size_t len2, int mode2);
 int df_name_compare(const char *name1, size_t len1, int mode1,
@@ -772,12 +663,6 @@ int df_name_compare(const char *name1, size_t len1, int mode1,
 int name_compare(const char *name1, size_t len1, const char *name2, size_t len2);
 int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2);
 
-void *read_object_with_reference(struct repository *r,
-				 const struct object_id *oid,
-				 enum object_type required_type,
-				 unsigned long *size,
-				 struct object_id *oid_ret);
-
 const char *git_editor(void);
 const char *git_sequence_editor(void);
 const char *git_pager(int stdout_is_tty);
@@ -819,14 +704,6 @@ struct pack_entry {
 	struct packed_git *p;
 };
 
-/*
- * Set this to 0 to prevent oid_object_info_extended() from fetching missing
- * blobs. This has a difference only if extensions.partialClone is set.
- *
- * Its default value is 1.
- */
-extern int fetch_if_missing;
-
 /* Dumb servers support */
 int update_server_info(int);
 
diff --git a/commit-graph.c b/commit-graph.c
index fe9a8b2..c20e73c 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -11,6 +11,7 @@
 #include "revision.h"
 #include "hash-lookup.h"
 #include "commit-graph.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "oid-array.h"
 #include "alloc.h"
diff --git a/diff.c b/diff.c
index 9e6ad94..f8e0d3b 100644
--- a/diff.c
+++ b/diff.c
@@ -35,6 +35,7 @@
 #include "help.h"
 #include "promisor-remote.h"
 #include "dir.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "setup.h"
 #include "strmap.h"
diff --git a/dir.c b/dir.c
index d1f1b1e..aa84099 100644
--- a/dir.c
+++ b/dir.c
@@ -13,6 +13,7 @@
 #include "dir.h"
 #include "environment.h"
 #include "gettext.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "attr.h"
 #include "refs.h"
diff --git a/environment.c b/environment.c
index e57292e..39efa49 100644
--- a/environment.c
+++ b/environment.c
@@ -19,6 +19,7 @@
 #include "fmt-merge-msg.h"
 #include "commit.h"
 #include "strvec.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "replace-object.h"
 #include "tmp-objdir.h"
diff --git a/http.c b/http.c
index 0212c0a..c3916ce 100644
--- a/http.c
+++ b/http.c
@@ -17,6 +17,7 @@
 #include "packfile.h"
 #include "protocol.h"
 #include "string-list.h"
+#include "object-file.h"
 #include "object-store.h"
 
 static struct trace_key trace_curl = TRACE_KEY_INIT(CURL);
diff --git a/merge-recursive.c b/merge-recursive.c
index 748a679..9875bdb 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -22,6 +22,7 @@
 #include "hex.h"
 #include "ll-merge.h"
 #include "lockfile.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "repository.h"
diff --git a/midx.c b/midx.c
index 9af3e5d..2d0da57 100644
--- a/midx.c
+++ b/midx.c
@@ -8,6 +8,7 @@
 #include "hex.h"
 #include "lockfile.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "hash-lookup.h"
 #include "midx.h"
diff --git a/notes-merge.c b/notes-merge.c
index b496b77..cc9538a 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -3,6 +3,7 @@
 #include "commit.h"
 #include "gettext.h"
 #include "refs.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "repository.h"
diff --git a/object-file.c b/object-file.c
index a4331e0..8163ddb 100644
--- a/object-file.c
+++ b/object-file.c
@@ -36,6 +36,7 @@
 #include "mergesort.h"
 #include "quote.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "promisor-remote.h"
 #include "setup.h"
diff --git a/object-file.h b/object-file.h
new file mode 100644
index 0000000..e0cfc3a
--- /dev/null
+++ b/object-file.h
@@ -0,0 +1,129 @@
+#ifndef OBJECT_FILE_H
+#define OBJECT_FILE_H
+
+#include "git-zlib.h"
+#include "object.h"
+
+/*
+ * Set this to 0 to prevent oid_object_info_extended() from fetching missing
+ * blobs. This has a difference only if extensions.partialClone is set.
+ *
+ * Its default value is 1.
+ */
+extern int fetch_if_missing;
+
+#define HASH_WRITE_OBJECT 1
+#define HASH_FORMAT_CHECK 2
+#define HASH_RENORMALIZE  4
+#define HASH_SILENT 8
+int index_fd(struct index_state *istate, struct object_id *oid, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags);
+int index_path(struct index_state *istate, struct object_id *oid, const char *path, struct stat *st, unsigned flags);
+
+/*
+ * Create the directory containing the named path, using care to be
+ * somewhat safe against races. Return one of the scld_error values to
+ * indicate success/failure. On error, set errno to describe the
+ * problem.
+ *
+ * SCLD_VANISHED indicates that one of the ancestor directories of the
+ * path existed at one point during the function call and then
+ * suddenly vanished, probably because another process pruned the
+ * directory while we were working.  To be robust against this kind of
+ * race, callers might want to try invoking the function again when it
+ * returns SCLD_VANISHED.
+ *
+ * safe_create_leading_directories() temporarily changes path while it
+ * is working but restores it before returning.
+ * safe_create_leading_directories_const() doesn't modify path, even
+ * temporarily. Both these variants adjust the permissions of the
+ * created directories to honor core.sharedRepository, so they are best
+ * suited for files inside the git dir. For working tree files, use
+ * safe_create_leading_directories_no_share() instead, as it ignores
+ * the core.sharedRepository setting.
+ */
+enum scld_error {
+	SCLD_OK = 0,
+	SCLD_FAILED = -1,
+	SCLD_PERMS = -2,
+	SCLD_EXISTS = -3,
+	SCLD_VANISHED = -4
+};
+enum scld_error safe_create_leading_directories(char *path);
+enum scld_error safe_create_leading_directories_const(const char *path);
+enum scld_error safe_create_leading_directories_no_share(char *path);
+
+int mkdir_in_gitdir(const char *path);
+
+int git_open_cloexec(const char *name, int flags);
+#define git_open(name) git_open_cloexec(name, O_RDONLY)
+
+/**
+ * unpack_loose_header() initializes the data stream needed to unpack
+ * a loose object header.
+ *
+ * Returns:
+ *
+ * - ULHR_OK on success
+ * - ULHR_BAD on error
+ * - ULHR_TOO_LONG if the header was too long
+ *
+ * It will only parse up to MAX_HEADER_LEN bytes unless an optional
+ * "hdrbuf" argument is non-NULL. This is intended for use with
+ * OBJECT_INFO_ALLOW_UNKNOWN_TYPE to extract the bad type for (error)
+ * reporting. The full header will be extracted to "hdrbuf" for use
+ * with parse_loose_header(), ULHR_TOO_LONG will still be returned
+ * from this function to indicate that the header was too long.
+ */
+enum unpack_loose_header_result {
+	ULHR_OK,
+	ULHR_BAD,
+	ULHR_TOO_LONG,
+};
+enum unpack_loose_header_result unpack_loose_header(git_zstream *stream,
+						    unsigned char *map,
+						    unsigned long mapsize,
+						    void *buffer,
+						    unsigned long bufsiz,
+						    struct strbuf *hdrbuf);
+
+/**
+ * parse_loose_header() parses the starting "<type> <len>\0" of an
+ * object. If it doesn't follow that format -1 is returned. To check
+ * the validity of the <type> populate the "typep" in the "struct
+ * object_info". It will be OBJ_BAD if the object type is unknown. The
+ * parsed <len> can be retrieved via "oi->sizep", and from there
+ * passed to unpack_loose_rest().
+ */
+struct object_info;
+int parse_loose_header(const char *hdr, struct object_info *oi);
+
+/**
+ * With in-core object data in "buf", rehash it to make sure the
+ * object name actually matches "oid" to detect object corruption.
+ *
+ * A negative value indicates an error, usually that the OID is not
+ * what we expected, but it might also indicate another error.
+ */
+int check_object_signature(struct repository *r, const struct object_id *oid,
+			   void *map, unsigned long size,
+			   enum object_type type);
+
+/**
+ * A streaming version of check_object_signature().
+ * Try reading the object named with "oid" using
+ * the streaming interface and rehash it to do the same.
+ */
+int stream_object_signature(struct repository *r, const struct object_id *oid);
+
+int finalize_object_file(const char *tmpfile, const char *filename);
+
+/* Helper to check and "touch" a file */
+int check_and_freshen_file(const char *fn, int freshen);
+
+void *read_object_with_reference(struct repository *r,
+				 const struct object_id *oid,
+				 enum object_type required_type,
+				 unsigned long *size,
+				 struct object_id *oid_ret);
+
+#endif /* OBJECT_FILE_H */
diff --git a/object.c b/object.c
index 45c9721..6d4ef15 100644
--- a/object.c
+++ b/object.c
@@ -3,6 +3,7 @@
 #include "hex.h"
 #include "object.h"
 #include "replace-object.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "blob.h"
 #include "tree.h"
diff --git a/pack-bitmap.c b/pack-bitmap.c
index eba838d..1371f17 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -16,6 +16,7 @@
 #include "packfile.h"
 #include "repository.h"
 #include "trace2.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "list-objects-filter-options.h"
 #include "midx.h"
diff --git a/pack-check.c b/pack-check.c
index 6974e40..40d88bc 100644
--- a/pack-check.c
+++ b/pack-check.c
@@ -6,6 +6,7 @@
 #include "pack-revindex.h"
 #include "progress.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-store.h"
 
 struct idx_entry {
diff --git a/pack-mtimes.c b/pack-mtimes.c
index afed632..0096ace 100644
--- a/pack-mtimes.c
+++ b/pack-mtimes.c
@@ -1,6 +1,7 @@
 #include "cache.h"
 #include "gettext.h"
 #include "pack-mtimes.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "packfile.h"
 
diff --git a/pack-revindex.c b/pack-revindex.c
index 9f9927d..22a1958 100644
--- a/pack-revindex.c
+++ b/pack-revindex.c
@@ -1,6 +1,7 @@
 #include "cache.h"
 #include "gettext.h"
 #include "pack-revindex.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "packfile.h"
 #include "trace2.h"
diff --git a/packfile.c b/packfile.c
index 02afbe7..9ae2278 100644
--- a/packfile.c
+++ b/packfile.c
@@ -18,6 +18,7 @@
 #include "trace.h"
 #include "tree-walk.h"
 #include "tree.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "midx.h"
 #include "commit-graph.h"
diff --git a/read-cache.c b/read-cache.c
index cbbfc03..f225bf4 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -14,6 +14,7 @@
 #include "cache-tree.h"
 #include "refs.h"
 #include "dir.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "oid-array.h"
 #include "tree.h"
diff --git a/refs/files-backend.c b/refs/files-backend.c
index e6a6971..d0581ee 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -12,6 +12,7 @@
 #include "../dir-iterator.h"
 #include "../lockfile.h"
 #include "../object.h"
+#include "../object-file.h"
 #include "../dir.h"
 #include "../chdir-notify.h"
 #include "../setup.h"
diff --git a/rerere.c b/rerere.c
index 5516e33..093c0f6 100644
--- a/rerere.c
+++ b/rerere.c
@@ -13,6 +13,7 @@
 #include "ll-merge.h"
 #include "attr.h"
 #include "pathspec.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "hash-lookup.h"
 #include "strmap.h"
diff --git a/revision.c b/revision.c
index 7438b50..3d86e07 100644
--- a/revision.c
+++ b/revision.c
@@ -5,6 +5,7 @@
 #include "gettext.h"
 #include "hex.h"
 #include "object-name.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "tag.h"
 #include "blob.h"
diff --git a/sequencer.c b/sequencer.c
index 22b287b..be10249 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -8,6 +8,7 @@
 #include "hex.h"
 #include "lockfile.h"
 #include "dir.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "object.h"
diff --git a/server-info.c b/server-info.c
index 355b6e0..68098dd 100644
--- a/server-info.c
+++ b/server-info.c
@@ -9,6 +9,7 @@
 #include "commit.h"
 #include "tag.h"
 #include "packfile.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "strbuf.h"
 #include "wrapper.h"
diff --git a/streaming.c b/streaming.c
index 27e014d..b341572 100644
--- a/streaming.c
+++ b/streaming.c
@@ -6,6 +6,7 @@
 #include "environment.h"
 #include "streaming.h"
 #include "repository.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "replace-object.h"
 #include "packfile.h"
diff --git a/submodule.c b/submodule.c
index 4f403b9..d09bc22 100644
--- a/submodule.c
+++ b/submodule.c
@@ -24,6 +24,7 @@
 #include "remote.h"
 #include "worktree.h"
 #include "parse-options.h"
+#include "object-file.h"
 #include "object-name.h"
 #include "object-store.h"
 #include "commit-reach.h"
diff --git a/tmp-objdir.c b/tmp-objdir.c
index 5adad19..fff7ff4 100644
--- a/tmp-objdir.c
+++ b/tmp-objdir.c
@@ -4,6 +4,7 @@
 #include "chdir-notify.h"
 #include "dir.h"
 #include "environment.h"
+#include "object-file.h"
 #include "sigchain.h"
 #include "string-list.h"
 #include "strbuf.h"
diff --git a/tree-walk.c b/tree-walk.c
index 59add24..2993c48 100644
--- a/tree-walk.c
+++ b/tree-walk.c
@@ -4,6 +4,7 @@
 #include "dir.h"
 #include "gettext.h"
 #include "hex.h"
+#include "object-file.h"
 #include "object-store.h"
 #include "trace2.h"
 #include "tree.h"