+extern void usage(const char *err) NORETURN;
+extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
+extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
+
+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);
+int parse_date(const char *date, char *buf, int bufsize);
+void datestamp(char *buf, int bufsize);
+unsigned long approxidate(const char *);
+
+extern int setup_ident(void);
+extern const char *git_author_info(void);
+extern const char *git_committer_info(void);
+
+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);
+
+extern struct alternate_object_database {
+ struct alternate_object_database *next;
+ char *name;
+ char base[0]; /* more */
+} *alt_odb_list;
+extern void prepare_alt_odb(void);
+
+extern struct packed_git {
+ struct packed_git *next;
+ unsigned long index_size;
+ unsigned long pack_size;
+ unsigned int *index_base;
+ void *pack_base;
+ unsigned int pack_last_used;
+ unsigned int pack_use_cnt;
+ int pack_local;
+ unsigned char sha1[20];
+ char pack_name[0]; /* something like ".git/objects/pack/xxxxx.pack" */
+} *packed_git;
+
+struct pack_entry {
+ unsigned int offset;
+ unsigned char sha1[20];
+ struct packed_git *p;
+};
+
+struct ref {
+ struct ref *next;
+ unsigned char old_sha1[20];
+ unsigned char new_sha1[20];
+ unsigned char force;
+ struct ref *peer_ref; /* when renaming */
+ char name[0];
+};
+
+extern int git_connect(int fd[2], char *url, const char *prog);
+extern int finish_connect(pid_t pid);
+extern int path_match(const char *path, int nr, char **match);
+extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
+ int nr_refspec, char **refspec, int all);
+extern int get_ack(int fd, unsigned char *result_sha1);
+extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, int ignore_funny);
+extern int server_supports(const char *feature);
+
+extern struct packed_git *parse_pack_index(unsigned char *sha1);
+extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
+ char *idx_path);
+
+extern void prepare_packed_git(void);
+extern void install_packed_git(struct packed_git *pack);
+
+extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
+ struct packed_git *packs);
+
+extern int use_packed_git(struct packed_git *);
+extern void unuse_packed_git(struct packed_git *);
+extern struct packed_git *add_packed_git(char *, int, int);
+extern int num_packed_objects(const struct packed_git *p);
+extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*);
+extern int find_pack_entry_one(const unsigned char *, struct pack_entry *, struct packed_git *);
+extern void *unpack_entry_gently(struct pack_entry *, char *, unsigned long *);
+extern void packed_object_info_detail(struct pack_entry *, char *, unsigned long *, unsigned long *, int *, unsigned char *);
+
+/* Dumb servers support */
+extern int update_server_info(int);
+
+#ifdef NO_MMAP
+
+#ifndef PROT_READ
+#define PROT_READ 1
+#define PROT_WRITE 2
+#define MAP_PRIVATE 1
+#define MAP_FAILED ((void*)-1)
+#endif
+
+extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
+extern int gitfakemunmap(void *start, size_t length);
+
+#endif
+
+typedef int (*config_fn_t)(const char *, const char *);
+extern int git_default_config(const char *, const char *);
+extern int git_config_from_file(config_fn_t fn, const char *);
+extern int git_config(config_fn_t fn);
+extern int git_config_int(const char *, const char *);
+extern int git_config_bool(const char *, const char *);
+extern int git_config_set(const char *, const char *);
+extern int git_config_set_multivar(const char *, const char *, const char *, int);
+extern int check_repository_format_version(const char *var, const char *value);
+
+#define MAX_GITNAME (1000)
+extern char git_default_email[MAX_GITNAME];
+extern char git_default_name[MAX_GITNAME];
+
+#define MAX_ENCODING_LENGTH 64
+extern char git_commit_encoding[MAX_ENCODING_LENGTH];
+
+/* Sane ctype - no locale, and works with signed chars */
+#undef isspace
+#undef isdigit
+#undef isalpha
+#undef isalnum
+#undef tolower
+#undef toupper
+extern unsigned char sane_ctype[256];
+#define GIT_SPACE 0x01
+#define GIT_DIGIT 0x02
+#define GIT_ALPHA 0x04
+#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
+#define isspace(x) sane_istest(x,GIT_SPACE)
+#define isdigit(x) sane_istest(x,GIT_DIGIT)
+#define isalpha(x) sane_istest(x,GIT_ALPHA)
+#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
+#define tolower(x) sane_case((unsigned char)(x), 0x20)
+#define toupper(x) sane_case((unsigned char)(x), 0)
+
+static inline int sane_case(int x, int high)
+{
+ if (sane_istest(x, GIT_ALPHA))
+ x = (x & ~0x20) | high;
+ return x;
+}