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