git/statinfo.h
Junio C Hamano a1264a08a1 Merge branch 'en/header-split-cache-h-part-3'
Header files cleanup.

* en/header-split-cache-h-part-3: (28 commits)
  fsmonitor-ll.h: split this header out of fsmonitor.h
  hash-ll, hashmap: move oidhash() to hash-ll
  object-store-ll.h: split this header out of object-store.h
  khash: name the structs that khash declares
  merge-ll: rename from ll-merge
  git-compat-util.h: remove unneccessary include of wildmatch.h
  builtin.h: remove unneccessary includes
  list-objects-filter-options.h: remove unneccessary include
  diff.h: remove unnecessary include of oidset.h
  repository: remove unnecessary include of path.h
  log-tree: replace include of revision.h with simple forward declaration
  cache.h: remove this no-longer-used header
  read-cache*.h: move declarations for read-cache.c functions from cache.h
  repository.h: move declaration of the_index from cache.h
  merge.h: move declarations for merge.c from cache.h
  diff.h: move declaration for global in diff.c from cache.h
  preload-index.h: move declarations for preload-index.c from elsewhere
  sparse-index.h: move declarations for sparse-index.c from cache.h
  name-hash.h: move declarations for name-hash.c from cache.h
  run-command.h: move declarations for run-command.c from cache.h
  ...
2023-06-29 16:43:21 -07:00

90 lines
2.3 KiB
C

#ifndef STATINFO_H
#define STATINFO_H
struct index_state;
/*
* The "cache_time" is just the low 32 bits of the
* time. It doesn't matter if it overflows - we only
* check it for equality in the 32 bits we save.
*/
struct cache_time {
uint32_t sec;
uint32_t nsec;
};
struct stat_data {
struct cache_time sd_ctime;
struct cache_time sd_mtime;
unsigned int sd_dev;
unsigned int sd_ino;
unsigned int sd_uid;
unsigned int sd_gid;
unsigned int sd_size;
};
/*
* A struct to encapsulate the concept of whether a file has changed
* since we last checked it. This uses criteria similar to those used
* for the index.
*/
struct stat_validity {
struct stat_data *sd;
};
#define MTIME_CHANGED 0x0001
#define CTIME_CHANGED 0x0002
#define OWNER_CHANGED 0x0004
#define MODE_CHANGED 0x0008
#define INODE_CHANGED 0x0010
#define DATA_CHANGED 0x0020
#define TYPE_CHANGED 0x0040
/*
* Record to sd the data from st that we use to check whether a file
* might have changed.
*/
void fill_stat_data(struct stat_data *sd, struct stat *st);
/*
* Return 0 if st is consistent with a file not having been changed
* since sd was filled. If there are differences, return a
* combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED,
* INODE_CHANGED, and DATA_CHANGED.
*/
int match_stat_data(const struct stat_data *sd, struct stat *st);
void stat_validity_clear(struct stat_validity *sv);
/*
* Returns 1 if the path is a regular file (or a symlink to a regular
* file) and matches the saved stat_validity, 0 otherwise. A missing
* or inaccessible file is considered a match if the struct was just
* initialized, or if the previous update found an inaccessible file.
*/
int stat_validity_check(struct stat_validity *sv, const char *path);
/*
* Update the stat_validity from a file opened at descriptor fd. If
* the file is missing, inaccessible, or not a regular file, then
* future calls to stat_validity_check will match iff one of those
* conditions continues to be true.
*/
void stat_validity_update(struct stat_validity *sv, int fd);
#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
#define DTYPE(de) ((de)->d_type)
#else
#undef DT_UNKNOWN
#undef DT_DIR
#undef DT_REG
#undef DT_LNK
#define DT_UNKNOWN 0
#define DT_DIR 1
#define DT_REG 2
#define DT_LNK 3
#define DTYPE(de) DT_UNKNOWN
#endif
#endif