X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=cache.h;h=88c2fa8d95b2cf6c0b2cd78c074659885625766d;hb=9bd94cafdf104e613d7609401e60711cd08e209c;hp=07598d469a15db2c10d36e627c0e77dea065b8ef;hpb=4bb04f2190d526f8917663f0be62d8026e1ed100;p=git.git

diff --git a/cache.h b/cache.h
index 07598d46..88c2fa8d 100644
--- a/cache.h
+++ b/cache.h
@@ -10,6 +10,7 @@
 #include <string.h>
 #include <errno.h>
 #include <sys/mman.h>
+#include <netinet/in.h>
 
 #include <openssl/sha.h>
 #include <zlib.h>
@@ -24,9 +25,9 @@
 
 #define CACHE_SIGNATURE 0x44495243	/* "DIRC" */
 struct cache_header {
-	unsigned int signature;
-	unsigned int version;
-	unsigned int entries;
+	unsigned int hdr_signature;
+	unsigned int hdr_version;
+	unsigned int hdr_entries;
 	unsigned char sha1[20];
 };
 
@@ -44,21 +45,35 @@ struct cache_time {
  * dev/ino/uid/gid/size are also just tracked to the low 32 bits
  * Again - this is just a (very strong in practice) heuristic that
  * the inode hasn't changed.
+ *
+ * We save the fields in big-endian order to allow using the
+ * index file over NFS transparently.
  */
 struct cache_entry {
-	struct cache_time ctime;
-	struct cache_time mtime;
-	unsigned int st_dev;
-	unsigned int st_ino;
-	unsigned int st_mode;
-	unsigned int st_uid;
-	unsigned int st_gid;
-	unsigned int st_size;
+	struct cache_time ce_ctime;
+	struct cache_time ce_mtime;
+	unsigned int ce_dev;
+	unsigned int ce_ino;
+	unsigned int ce_mode;
+	unsigned int ce_uid;
+	unsigned int ce_gid;
+	unsigned int ce_size;
 	unsigned char sha1[20];
-	unsigned short namelen;
+	unsigned short ce_flags;
 	char name[0];
 };
 
+#define CE_NAMEMASK  (0x0fff)
+#define CE_STAGEMASK (0x3000)
+#define CE_STAGESHIFT 12
+
+#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
+#define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
+#define ce_size(ce) cache_entry_size(ce_namelen(ce))
+#define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
+
+#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
+
 const char *sha1_file_directory;
 struct cache_entry **active_cache;
 unsigned int active_nr, active_alloc;
@@ -66,9 +81,6 @@ unsigned int active_nr, active_alloc;
 #define DB_ENVIRONMENT "SHA1_FILE_DIRECTORY"
 #define DEFAULT_DB_ENVIRONMENT ".git/objects"
 
-#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
-#define ce_size(ce) cache_entry_size((ce)->namelen)
-
 #define alloc_nr(x) (((x)+16)*3/2)
 
 /* Initialize and use the cache information */
@@ -104,7 +116,10 @@ extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 extern char *sha1_to_hex(const unsigned char *sha1);	/* static buffer result! */
 
 /* General helper functions */
-extern void usage(const char *err, ...);
+extern void usage(const char *err);
+extern void die(const char *err, ...);
+extern int error(const char *err, ...);
+
 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 
 #endif /* CACHE_H */