mirror of
https://github.com/git/git.git
synced 2024-11-15 15:03:47 +01:00
ab580acea4
This introduces an in-place topological sort procedure to commit.c.
Given a list of commits, sort_in_topological_order() will perform an in-place
topological sort of that list.
The invariant that applies to the resulting list is:
a reachable from b => ord(b) < ord(a)
This invariant is weaker than the --merge-order invariant, but is cheaper
to calculate (assuming the list has been identified) and will serve any
purpose where only a minimal topological order guarantee is required.
Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
#ifndef COMMIT_H
|
|
#define COMMIT_H
|
|
|
|
#include "object.h"
|
|
#include "tree.h"
|
|
|
|
struct commit_list {
|
|
struct commit *item;
|
|
struct commit_list *next;
|
|
};
|
|
|
|
struct commit {
|
|
struct object object;
|
|
unsigned long date;
|
|
struct commit_list *parents;
|
|
struct tree *tree;
|
|
char *buffer;
|
|
};
|
|
|
|
extern const char *commit_type;
|
|
|
|
struct commit *lookup_commit(const unsigned char *sha1);
|
|
struct commit *lookup_commit_reference(const unsigned char *sha1);
|
|
|
|
int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size);
|
|
|
|
int parse_commit(struct commit *item);
|
|
|
|
struct commit_list * commit_list_insert(struct commit *item, struct commit_list **list_p);
|
|
struct commit_list * insert_by_date(struct commit *item, struct commit_list **list);
|
|
|
|
void free_commit_list(struct commit_list *list);
|
|
|
|
void sort_by_date(struct commit_list **list);
|
|
|
|
/* Commit formats */
|
|
enum cmit_fmt {
|
|
CMIT_FMT_RAW,
|
|
CMIT_FMT_MEDIUM,
|
|
CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
|
|
CMIT_FMT_SHORT,
|
|
CMIT_FMT_FULL,
|
|
};
|
|
|
|
extern enum cmit_fmt get_commit_format(const char *arg);
|
|
extern unsigned long pretty_print_commit(enum cmit_fmt fmt, const char *msg, unsigned long len, char *buf, unsigned long space);
|
|
|
|
/** Removes the first commit from a list sorted by date, and adds all
|
|
* of its parents.
|
|
**/
|
|
struct commit *pop_most_recent_commit(struct commit_list **list,
|
|
unsigned int mark);
|
|
|
|
struct commit *pop_commit(struct commit_list **stack);
|
|
|
|
int count_parents(struct commit * commit);
|
|
|
|
/*
|
|
* Performs an in-place topological sort of list supplied.
|
|
*
|
|
* Pre-conditions:
|
|
* all commits in input list and all parents of those
|
|
* commits must have object.util == NULL
|
|
*
|
|
* Post-conditions:
|
|
* invariant of resulting list is:
|
|
* a reachable from b => ord(b) < ord(a)
|
|
*/
|
|
void sort_in_topological_order(struct commit_list ** list);
|
|
#endif /* COMMIT_H */
|