thodg/libgit2/src/revwalk.h

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• Hash : 3315782c
  Author :
  Date : 2010-08-08T14:12:17
  

  Redesigned the walking/object lookup interface The old 'git_revpool' object has been removed and split into two distinct objects with separate functionality, in order to have separate methods for object management and object walking. * A new object 'git_repository' does the high-level management of a repository's objects (commits, trees, tags, etc) on top of a 'git_odb'. Eventually, it will also manage other repository attributes (e.g. tag resolution, references, etc). See: src/git/repository.h * A new external method 'git_repository_lookup(repo, oid, type)' has been added to the 'git_repository' API. All object lookups (git_XXX_lookup()) are now wrappers to this method, and duplicated code has been removed. The method does automatic type checking and returns a generic 'git_revpool_object' that can be cast to any specific object. See: src/git/repository.h * The external methods for object parsing of repository objects (git_XXX_parse()) have been removed. Loading objects from the repository is now managed through the 'lookup' functions. These objects are loaded with minimal information, and the relevant parsing is done automatically when the user requests any of the parsed attributes through accessor methods. An attribute has been added to 'git_repository' in order to force the parsing of all the repository objects immediately after lookup. See: src/git/commit.h See: src/git/tag.h See: src/git/tree.h * The previous walking functionality of the revpool is now found in 'git_revwalk', which does the actual revision walking on a repository; the attributes when walking through commits in a database have been decoupled from the actual commit objects. This increases performance when accessing commits during the walk and allows to have several 'git_revwalk' instances working at the same time on top of the same repository, without having to load commits in memory several times. See: src/git/revwalk.h * The old 'git_revpool_table' has been renamed to 'git_hashtable' and now works as a generic hashtable with support for any kind of object and custom hash functions. See: src/hashtable.h * All the relevant unit tests have been updated, renamed and grouped accordingly. Signed-off-by: Vicent Marti <tanoku@gmail.com>

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• src/revwalk.h

• #ifndef INCLUDE_revwalk_h__
  #define INCLUDE_revwalk_h__
  
  #include "git/common.h"
  #include "git/revwalk.h"
  
  #include "commit.h"
  #include "repository.h"
  #include "hashtable.h"
  
  struct git_revwalk_commit;
  
  typedef struct git_revwalk_listnode {
  	struct git_revwalk_commit *walk_commit;
  	struct git_revwalk_listnode *next;
  	struct git_revwalk_listnode *prev;
  } git_revwalk_listnode;
  
  typedef struct git_revwalk_list {
  	struct git_revwalk_listnode *head;
  	struct git_revwalk_listnode *tail;
  	size_t size;
  } git_revwalk_list;
  
  
  struct git_revwalk_commit {
  
  	git_commit *commit_object;
  	git_revwalk_list parents;
  
  	unsigned short in_degree;
  	unsigned seen:1,
  			 uninteresting:1,
  			 topo_delay:1,
  			 flags:25;
  };
  
  typedef struct git_revwalk_commit git_revwalk_commit;
  
  struct git_revwalk {
  	git_repository *repo;
  
  	git_hashtable *commits;
  	git_revwalk_list iterator;
  
  	git_revwalk_commit *(*next)(git_revwalk_list *);
  
  	unsigned walking:1;
  	unsigned int sorting;
  };
  
  
  void git_revwalk__prepare_walk(git_revwalk *walk);
  int git_revwalk__enroot(git_revwalk *walk, git_commit *commit);
  
  int git_revwalk_list_push_back(git_revwalk_list *list, git_revwalk_commit *commit);
  int git_revwalk_list_push_front(git_revwalk_list *list, git_revwalk_commit *obj);
  
  git_revwalk_commit *git_revwalk_list_pop_back(git_revwalk_list *list);
  git_revwalk_commit *git_revwalk_list_pop_front(git_revwalk_list *list);
  
  void git_revwalk_list_clear(git_revwalk_list *list);
  
  void git_revwalk_list_timesort(git_revwalk_list *list);
  void git_revwalk_list_toposort(git_revwalk_list *list);
  
  #endif /* INCLUDE_revwalk_h__ */
  

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