};
/*
- * Packed object index header
- *
- * struct pack_idx_header {
- * uint32_t idx_signature;
- * uint32_t idx_version;
- * };
- *
- * Note: this header isn't active yet. In future versions of git
- * we may change the index file format. At that time we would start
- * the first four bytes of the new index format with this signature,
- * as all older git binaries would find this value illegal and abort
- * reading the file.
+ * The first four bytes of index formats later than version 1 should
+ * start with this signature, as all older git binaries would find this
+ * value illegal and abort reading the file.
*
* This is the case because the number of objects in a packfile
* cannot exceed 1,431,660,000 as every object would need at least
- * 3 bytes of data and the overall packfile cannot exceed 4 GiB due
- * to the 32 bit offsets used by the index. Clearly the signature
- * exceeds this maximum.
+ * 3 bytes of data and the overall packfile cannot exceed 4 GiB with
+ * version 1 of the index file due to the offsets limited to 32 bits.
+ * Clearly the signature exceeds this maximum.
*
* Very old git binaries will also compare the first 4 bytes to the
* next 4 bytes in the index and abort with a "non-monotonic index"
*/
#define PACK_IDX_SIGNATURE 0xff744f63 /* "\377tOc" */
+/* These may be overridden by command-line parameters */
+extern uint32_t pack_idx_default_version;
+extern uint32_t pack_idx_off32_limit;
+
+/*
+ * Packed object index header
+ */
+struct pack_idx_header {
+ uint32_t idx_signature;
+ uint32_t idx_version;
+};
+
+/*
+ * Common part of object structure used for write_idx_file
+ */
+struct pack_idx_entry {
+ unsigned char sha1[20];
+ uint32_t crc32;
+ off_t offset;
+};
+
+extern const char *write_idx_file(const char *index_name, struct pack_idx_entry **objects, int nr_objects, unsigned char *sha1);
+
extern int verify_pack(struct packed_git *, int);
+extern void fixup_pack_header_footer(int, unsigned char *, const char *, uint32_t);
#define PH_ERROR_EOF (-1)
#define PH_ERROR_PACK_SIGNATURE (-2)