[PATCH] Add tag header/parser to library

[git.git] / cache.h

diff --git a/cache.h b/cache.h
index eab355d..3277d48 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>
 
 /*
@@ -83,6 +85,13 @@ unsigned int active_nr, active_alloc;
 #define DB_ENVIRONMENT "SHA1_FILE_DIRECTORY"
 #define DEFAULT_DB_ENVIRONMENT ".git/objects"
 
+#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)
 
 /* Initialize and use the cache information */
@@ -90,7 +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
@@ -110,9 +121,17 @@ extern int write_sha1_buffer(const unsigned char *sha1, void *buf, unsigned int
 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 write_sha1_file(char *buf, unsigned long len, const char *type, unsigned char *return_sha1);
+
 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);
+
+extern int write_sha1_from_fd(const unsigned char *sha1, int fd);
+
+extern int has_sha1_file(const unsigned char *sha1);
+
 /* Convert to/from hex/sha1 representation */
 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 extern char *sha1_to_hex(const unsigned char *sha1);   /* static buffer result! */
@@ -124,4 +143,24 @@ 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);
+
+static inline void *xmalloc(int size)
+{
+       void *ret = malloc(size);
+       if (!ret)
+               die("Out of memory, malloc failed");
+       return ret;
+}
+
+static inline void *xrealloc(void *ptr, int size)
+{
+       void *ret = realloc(ptr, size);
+       if (!ret)
+               die("Out of memory, realloc failed");
+       return ret;
+}
+
 #endif /* CACHE_H */