worktree: check the result of read_in_full()

diff --git a/packfile.h b/packfile.h
index 790b174cb33ed4e9376805143828bd42d8a2cd6c..0cdeb54dcd97a67c38285e8f81412ec71273fd7f 100644 (file)
--- a/packfile.h
+++ b/packfile.h
@@ -42,6 +42,9 @@ extern void install_packed_git(struct packed_git *pack);
  */
 unsigned long approximate_object_count(void);
 
+extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
+                                        struct packed_git *packs);
+
 extern void pack_report(void);
 
 /*
@@ -63,6 +66,16 @@ extern void unuse_pack(struct pack_window **);
 extern void clear_delta_base_cache(void);
 extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local);
 
+/*
+ * Make sure that a pointer access into an mmap'd index file is within bounds,
+ * and can provide at least 8 bytes of data.
+ *
+ * Note that this is only necessary for variable-length segments of the file
+ * (like the 64-bit extended offset table), as we compare the size to the
+ * fixed-length parts when we open the file.
+ */
+extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr);
+
 /*
  * Return the SHA-1 of the nth object within the specified packfile.
  * Open the index if it is not already open.  The return value points
@@ -77,7 +90,19 @@ extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t
  */
 extern const struct object_id *nth_packed_object_oid(struct object_id *, struct packed_git *, uint32_t n);
 
+/*
+ * Return the offset of the nth object within the specified packfile.
+ * The index must already be opened.
+ */
+extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);
+
+/*
+ * If the object named sha1 is present in the specified packfile,
+ * return its offset within the packfile; otherwise, return 0.
+ */
+extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
 
+extern int is_pack_valid(struct packed_git *);
 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
@@ -85,8 +110,6 @@ extern int unpack_object_header(struct packed_git *, struct pack_window **, off_
 
 extern void release_pack_memory(size_t);
 
-extern int open_packed_git(struct packed_git *p);
-
 /* global flag to enable extra checks when accessing packed objects */
 extern int do_check_packed_object_crc;
 
@@ -94,4 +117,22 @@ extern int packed_object_info(struct packed_git *pack, off_t offset, struct obje
 
 extern void mark_bad_packed_object(struct packed_git *p, const unsigned char *sha1);
 extern const struct packed_git *has_packed_and_bad(const unsigned char *sha1);
+
+extern int find_pack_entry(const unsigned char *sha1, struct pack_entry *e);
+
+extern int has_sha1_pack(const unsigned char *sha1);
+
+extern int has_pack_index(const unsigned char *sha1);
+
+/*
+ * Iterate over packed objects in both the local
+ * repository and any alternates repositories (unless the
+ * FOR_EACH_OBJECT_LOCAL_ONLY flag, defined in cache.h, is set).
+ */
+typedef int each_packed_object_fn(const struct object_id *oid,
+                                 struct packed_git *pack,
+                                 uint32_t pos,
+                                 void *data);
+extern int for_each_packed_object(each_packed_object_fn, void *, unsigned flags);
+
 #endif