#ifndef CACHE_H
#define CACHE_H
+#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
+#include <limits.h>
#include <sys/mman.h>
+#include <sys/param.h>
#include <netinet/in.h>
-#include <openssl/sha.h>
+#include SHA1_HEADER
#include <zlib.h>
+#if ZLIB_VERNUM < 0x1200
+#define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
+#endif
+
+#ifdef DT_UNKNOWN
+#define DTYPE(de) ((de)->d_type)
+#else
+#define DT_UNKNOWN 0
+#define DT_DIR 1
+#define DT_REG 2
+#define DT_LNK 3
+#define DTYPE(de) DT_UNKNOWN
+#endif
+
+#ifdef __GNUC__
+#define NORETURN __attribute__((__noreturn__))
+#else
+#define NORETURN
+#endif
+
+/*
+ * Environment variables transition.
+ * We accept older names for now but warn.
+ */
+extern char *gitenv_bc(const char *);
+#define gitenv(e) (getenv(e) ? : gitenv_bc(e))
+
/*
* Basic data structures for the directory cache
- *
- * NOTE NOTE NOTE! This is all in the native CPU byte format. It's
- * not even trying to be portable. It's trying to be efficient. It's
- * just a cache, after all.
*/
#define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
unsigned int hdr_signature;
unsigned int hdr_version;
unsigned int hdr_entries;
- unsigned char sha1[20];
};
/*
#define CE_NAMEMASK (0x0fff)
#define CE_STAGEMASK (0x3000)
+#define CE_UPDATE (0x4000)
#define CE_STAGESHIFT 12
#define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
#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))
+static inline unsigned int create_ce_mode(unsigned int mode)
+{
+ if (S_ISLNK(mode))
+ return htonl(S_IFLNK);
+ return 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;
-unsigned int active_nr, active_alloc;
+extern struct cache_entry **active_cache;
+extern unsigned int active_nr, active_alloc, active_cache_changed;
+
+#define GIT_DIR_ENVIRONMENT "GIT_DIR"
+#define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
+#define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
+#define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
-#define DB_ENVIRONMENT "SHA1_FILE_DIRECTORY"
-#define DEFAULT_DB_ENVIRONMENT ".git/objects"
+extern char *get_object_directory(void);
+extern char *get_refs_directory(void);
+extern char *get_index_file(void);
+
+#define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
#define alloc_nr(x) (((x)+16)*3/2)
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);
+#define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
+#define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
+extern int add_cache_entry(struct cache_entry *ce, int option);
+extern int remove_cache_entry_at(int pos);
extern int remove_file_from_cache(char *path);
-extern int cache_match_stat(struct cache_entry *ce, struct stat *st);
+extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
+extern int ce_match_stat(struct cache_entry *ce, struct stat *st);
+extern int index_fd(unsigned char *sha1, int fd, struct stat *st);
+extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
+
+struct cache_file {
+ struct cache_file *next;
+ char lockfile[PATH_MAX];
+};
+extern int hold_index_file_for_update(struct cache_file *, const char *path);
+extern int commit_index_file(struct cache_file *);
+extern void rollback_index_file(struct cache_file *);
#define MTIME_CHANGED 0x0001
#define CTIME_CHANGED 0x0002
#define MODE_CHANGED 0x0008
#define INODE_CHANGED 0x0010
#define DATA_CHANGED 0x0020
+#define TYPE_CHANGED 0x0040
/* Return a statically allocated filename matching the sha1 signature */
extern char *sha1_file_name(const unsigned char *sha1);
-/* Write a memory buffer out to the sha file */
-extern int write_sha1_buffer(const 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(const unsigned char *sha1, unsigned long *size);
+extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size);
+extern int parse_sha1_header(char *hdr, char *type, unsigned long *sizep);
+extern int sha1_delta_base(const unsigned char *, unsigned char *);
+extern int sha1_file_size(const unsigned char *, unsigned long *);
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, const char *type);
+extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
+
+extern int check_sha1_signature(const 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(const char *str, unsigned char *sha1);
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 die(const char *err, ...);
+extern void usage(const char *err) NORETURN;
+extern void die(const char *err, ...) NORETURN;
extern int error(const char *err, ...);
+extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
+extern void *read_object_with_reference(const unsigned char *sha1,
+ const char *required_type,
+ unsigned long *size,
+ unsigned char *sha1_ret);
+
+const char *show_date(unsigned long time, int timezone);
+void parse_date(char *date, char *buf, int bufsize);
+void datestamp(char *buf, int bufsize);
+
+static inline void *xmalloc(size_t size)
+{
+ void *ret = malloc(size);
+ if (!ret)
+ die("Out of memory, malloc failed");
+ return ret;
+}
+
+static inline void *xrealloc(void *ptr, size_t size)
+{
+ void *ret = realloc(ptr, size);
+ if (!ret)
+ die("Out of memory, realloc failed");
+ return ret;
+}
+
+static inline void *xcalloc(size_t nmemb, size_t size)
+{
+ void *ret = calloc(nmemb, size);
+ if (!ret)
+ die("Out of memory, calloc failed");
+ return ret;
+}
+
+struct checkout {
+ const char *base_dir;
+ int base_dir_len;
+ unsigned force:1,
+ quiet:1,
+ not_new:1,
+ refresh_cache:1;
+};
+
+extern int checkout_entry(struct cache_entry *ce, struct checkout *state);
+
#endif /* CACHE_H */
projects / git.git / blobdiff