15 #include <sys/param.h>
16 #include <netinet/in.h>
21 #if ZLIB_VERNUM < 0x1200
22 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
26 #define DTYPE(de) ((de)->d_type)
32 #define DTYPE(de) DT_UNKNOWN
36 * Environment variables transition.
37 * We accept older names for now but warn.
39 extern char *gitenv_bc(const char *);
40 #define gitenv(e) (getenv(e) ? : gitenv_bc(e))
43 * Basic data structures for the directory cache
46 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
48 unsigned int hdr_signature;
49 unsigned int hdr_version;
50 unsigned int hdr_entries;
54 * The "cache_time" is just the low 32 bits of the
55 * time. It doesn't matter if it overflows - we only
56 * check it for equality in the 32 bits we save.
64 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
65 * Again - this is just a (very strong in practice) heuristic that
66 * the inode hasn't changed.
68 * We save the fields in big-endian order to allow using the
69 * index file over NFS transparently.
72 struct cache_time ce_ctime;
73 struct cache_time ce_mtime;
80 unsigned char sha1[20];
81 unsigned short ce_flags;
85 #define CE_NAMEMASK (0x0fff)
86 #define CE_STAGEMASK (0x3000)
87 #define CE_UPDATE (0x4000)
88 #define CE_STAGESHIFT 12
90 #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
91 #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
92 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
93 #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
95 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
96 static inline unsigned int create_ce_mode(unsigned int mode)
99 return htonl(S_IFLNK);
100 return htonl(S_IFREG | ce_permissions(mode));
103 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
105 extern struct cache_entry **active_cache;
106 extern unsigned int active_nr, active_alloc, active_cache_changed;
108 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
109 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
110 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
111 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
113 extern char *get_object_directory(void);
114 extern char *get_index_file(void);
116 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
118 #define alloc_nr(x) (((x)+16)*3/2)
120 /* Initialize and use the cache information */
121 extern int read_cache(void);
122 extern int write_cache(int newfd, struct cache_entry **cache, int entries);
123 extern int cache_name_pos(const char *name, int namelen);
124 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
125 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
126 extern int add_cache_entry(struct cache_entry *ce, int option);
127 extern int remove_cache_entry_at(int pos);
128 extern int remove_file_from_cache(char *path);
129 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
130 extern int ce_match_stat(struct cache_entry *ce, struct stat *st);
131 extern int index_fd(unsigned char *sha1, int fd, struct stat *st);
132 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
135 struct cache_file *next;
136 char lockfile[PATH_MAX];
138 extern int hold_index_file_for_update(struct cache_file *, const char *path);
139 extern int commit_index_file(struct cache_file *);
140 extern void rollback_index_file(struct cache_file *);
142 #define MTIME_CHANGED 0x0001
143 #define CTIME_CHANGED 0x0002
144 #define OWNER_CHANGED 0x0004
145 #define MODE_CHANGED 0x0008
146 #define INODE_CHANGED 0x0010
147 #define DATA_CHANGED 0x0020
148 #define TYPE_CHANGED 0x0040
150 /* Return a statically allocated filename matching the sha1 signature */
151 extern char *sha1_file_name(const unsigned char *sha1);
153 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
154 extern void * map_sha1_file(const unsigned char *sha1, unsigned long *size);
155 extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size);
156 extern int parse_sha1_header(char *hdr, char *type, unsigned long *sizep);
157 extern int sha1_delta_base(const unsigned char *, unsigned char *);
158 extern int sha1_file_size(const unsigned char *, unsigned long *);
159 extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size);
160 extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size);
161 extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
163 extern int check_sha1_signature(unsigned char *sha1, void *buf, unsigned long size, const char *type);
165 /* Read a tree into the cache */
166 extern int read_tree(void *buffer, unsigned long size, int stage);
168 extern int write_sha1_from_fd(const unsigned char *sha1, int fd);
170 extern int has_sha1_file(const unsigned char *sha1);
172 /* Convert to/from hex/sha1 representation */
173 extern int get_sha1(const char *str, unsigned char *sha1);
174 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
175 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
177 /* General helper functions */
178 extern void usage(const char *err);
179 extern void die(const char *err, ...);
180 extern int error(const char *err, ...);
182 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
183 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
185 extern void *read_object_with_reference(const unsigned char *sha1,
186 const char *required_type,
188 unsigned char *sha1_ret);
190 const char *show_date(unsigned long time, int timezone);
191 void parse_date(char *date, char *buf, int bufsize);
192 void datestamp(char *buf, int bufsize);
194 static inline void *xmalloc(size_t size)
196 void *ret = malloc(size);
198 die("Out of memory, malloc failed");
202 static inline void *xrealloc(void *ptr, size_t size)
204 void *ret = realloc(ptr, size);
206 die("Out of memory, realloc failed");
210 static inline void *xcalloc(size_t nmemb, size_t size)
212 void *ret = calloc(nmemb, size);
214 die("Out of memory, calloc failed");
219 const char *base_dir;
227 extern int checkout_entry(struct cache_entry *ce, struct checkout *state);