Add a "checkout-cache" command which does what the name suggests.

diff --git a/cache.h b/cache.h
index 98a32a9ad39883c6d05a000a68511d4b1ee2b3c7..0038e8b8e04b287ec876594cbab9df4af09ce131 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -7,6 +7,7 @@
 #include <stddef.h>
 #include <stdlib.h>
 #include <stdarg.h>
+#include <string.h>
 #include <errno.h>
 #include <sys/mman.h>
 
@@ -55,7 +56,7 @@ struct cache_entry {
        unsigned int st_size;
        unsigned char sha1[20];
        unsigned short namelen;
-       unsigned char name[0];
+       char name[0];
 };
 
 const char *sha1_file_directory;
@@ -70,8 +71,17 @@ unsigned int active_nr, active_alloc;
 
 #define alloc_nr(x) (((x)+16)*3/2)
 
-/* Initialize the cache information */
+/* Initialize and use the cache information */
 extern int read_cache(void);
+extern int cache_name_pos(const char *name, int namelen);
+extern int cache_match_stat(struct cache_entry *ce, struct stat *st);
+
+#define MTIME_CHANGED  0x0001
+#define CTIME_CHANGED  0x0002
+#define OWNER_CHANGED  0x0004
+#define MODE_CHANGED    0x0008
+#define INODE_CHANGED   0x0010
+#define DATA_CHANGED    0x0020
 
 /* Return a statically allocated filename matching the sha1 signature */
 extern char *sha1_file_name(unsigned char *sha1);
@@ -80,8 +90,11 @@ extern char *sha1_file_name(unsigned char *sha1);
 extern int write_sha1_buffer(unsigned char *sha1, void *buf, unsigned int size);
 
 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
+extern void * map_sha1_file(unsigned char *sha1, unsigned long *size);
+extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size);
 extern void * read_sha1_file(unsigned char *sha1, char *type, unsigned long *size);
 extern int write_sha1_file(char *buf, unsigned len);
+extern int check_sha1_signature(unsigned char *sha1, void *buf, unsigned long size);
 
 /* Convert to/from hex/sha1 representation */
 extern int get_sha1_hex(char *hex, unsigned char *sha1);