[PATCH] PPC assembly implementation of SHA1

[git.git] / cache.h

diff --git a/cache.h b/cache.h
index bce48b0..bf30ac4 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -1,6 +1,7 @@
 #ifndef CACHE_H
 #define CACHE_H
 
+#include <unistd.h>
 #include <stdio.h>
 #include <sys/stat.h>
 #include <fcntl.h>
@@ -10,9 +11,10 @@
 #include <string.h>
 #include <errno.h>
 #include <sys/mman.h>
+#include <sys/param.h>
 #include <netinet/in.h>
 
-#include <openssl/sha.h>
+#include SHA1_HEADER
 #include <zlib.h>
 
 /*
@@ -28,7 +30,6 @@ struct cache_header {
        unsigned int hdr_signature;
        unsigned int hdr_version;
        unsigned int hdr_entries;
-       unsigned char sha1[20];
 };
 
 /*
@@ -63,9 +64,19 @@ struct cache_entry {
        char name[0];
 };
 
-#define CE_NAMEMASK (0x0fff)
-#define CE_STAGE1   (0x1000)
-#define CE_STAGE2   (0x2000)
+#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 ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
+#define create_ce_mode(mode) htonl(S_IFREG | ce_permissions(mode))
+
+#define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
 
 const char *sha1_file_directory;
 struct cache_entry **active_cache;
@@ -74,9 +85,12 @@ 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_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
-#define ce_size(ce) cache_entry_size(ce_namelen(ce))
+#define get_object_directory() (getenv(DB_ENVIRONMENT) ? : DEFAULT_DB_ENVIRONMENT)
+
+#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
+#define DEFAULT_INDEX_ENVIRONMENT ".git/index"
+
+#define get_index_file() (getenv(INDEX_ENVIRONMENT) ? : DEFAULT_INDEX_ENVIRONMENT)
 
 #define alloc_nr(x) (((x)+16)*3/2)
 
@@ -85,7 +99,9 @@ extern int read_cache(void);
 extern int write_cache(int newfd, struct cache_entry **cache, int entries);
 extern int cache_name_pos(const char *name, int namelen);
 extern int add_cache_entry(struct cache_entry *ce, int ok_to_add);
+extern int remove_entry_at(int pos);
 extern int remove_file_from_cache(char *path);
+extern int same_name(struct cache_entry *a, struct cache_entry *b);
 extern int cache_match_stat(struct cache_entry *ce, struct stat *st);
 
 #define MTIME_CHANGED  0x0001
@@ -106,7 +122,10 @@ extern void * map_sha1_file(const 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(const unsigned char *sha1, char *type, unsigned long *size);
 extern int write_sha1_file(char *buf, unsigned len, unsigned char *return_sha1);
-extern int check_sha1_signature(unsigned char *sha1, void *buf, unsigned long size);
+extern int check_sha1_signature(unsigned char *sha1, void *buf, unsigned long size, const char *type);
+
+/* Read a tree into the cache */
+extern int read_tree(void *buffer, unsigned long size, int stage);
 
 /* Convert to/from hex/sha1 representation */
 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
@@ -119,4 +138,8 @@ extern int error(const char *err, ...);
 
 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
 
+extern void *read_tree_with_tree_or_commit_sha1(const unsigned char *sha1,
+                                               unsigned long *size,
+                                               unsigned char *tree_sha1_ret);
+
 #endif /* CACHE_H */