thodg/libgit2/include/git2/revwalk.h

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• Hash : 22d2062d
  Author :
  Date : 2019-01-09T18:25:10
  

  Introduce GIT_CALLBACK macro to enforce cdecl Since we now always build the library with cdecl calling conventions, our callbacks should be decorated as such so that users will not be able to provide callbacks defined with other calling conventions. The `GIT_CALLBACK` macro will inject the `__cdecl` attribute as appropriate.

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• include/git2/revwalk.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #ifndef INCLUDE_git_revwalk_h__
  #define INCLUDE_git_revwalk_h__
  
  #include "common.h"
  #include "types.h"
  #include "oid.h"
  
  /**
   * @file git2/revwalk.h
   * @brief Git revision traversal routines
   * @defgroup git_revwalk Git revision traversal routines
   * @ingroup Git
   * @{
   */
  GIT_BEGIN_DECL
  
  /**
   * Flags to specify the sorting which a revwalk should perform.
   */
  typedef enum {
  	/**
  	 * Sort the output with the same default method from `git`: reverse
  	 * chronological order. This is the default sorting for new walkers.
  	 */
  	GIT_SORT_NONE = 0,
  
  	/**
  	 * Sort the repository contents in topological order (no parents before
  	 * all of its children are shown); this sorting mode can be combined
  	 * with time sorting to produce `git`'s `--date-order``.
  	 */
  	GIT_SORT_TOPOLOGICAL = 1 << 0,
  
  	/**
  	 * Sort the repository contents by commit time;
  	 * this sorting mode can be combined with
  	 * topological sorting.
  	 */
  	GIT_SORT_TIME = 1 << 1,
  
  	/**
  	 * Iterate through the repository contents in reverse
  	 * order; this sorting mode can be combined with
  	 * any of the above.
  	 */
  	GIT_SORT_REVERSE = 1 << 2,
  } git_sort_t;
  
  /**
   * Allocate a new revision walker to iterate through a repo.
   *
   * This revision walker uses a custom memory pool and an internal
   * commit cache, so it is relatively expensive to allocate.
   *
   * For maximum performance, this revision walker should be
   * reused for different walks.
   *
   * This revision walker is *not* thread safe: it may only be
   * used to walk a repository on a single thread; however,
   * it is possible to have several revision walkers in
   * several different threads walking the same repository.
   *
   * @param out pointer to the new revision walker
   * @param repo the repo to walk through
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_revwalk_new(git_revwalk **out, git_repository *repo);
  
  /**
   * Reset the revision walker for reuse.
   *
   * This will clear all the pushed and hidden commits, and
   * leave the walker in a blank state (just like at
   * creation) ready to receive new commit pushes and
   * start a new walk.
   *
   * The revision walk is automatically reset when a walk
   * is over.
   *
   * @param walker handle to reset.
   */
  GIT_EXTERN(void) git_revwalk_reset(git_revwalk *walker);
  
  /**
   * Add a new root for the traversal
   *
   * The pushed commit will be marked as one of the roots from which to
   * start the walk. This commit may not be walked if it or a child is
   * hidden.
   *
   * At least one commit must be pushed onto the walker before a walk
   * can be started.
   *
   * The given id must belong to a committish on the walked
   * repository.
   *
   * @param walk the walker being used for the traversal.
   * @param id the oid of the commit to start from.
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_revwalk_push(git_revwalk *walk, const git_oid *id);
  
  /**
   * Push matching references
   *
   * The OIDs pointed to by the references that match the given glob
   * pattern will be pushed to the revision walker.
   *
   * A leading 'refs/' is implied if not present as well as a trailing
   * '/\*' if the glob lacks '?', '\*' or '['.
   *
   * Any references matching this glob which do not point to a
   * committish will be ignored.
   *
   * @param walk the walker being used for the traversal
   * @param glob the glob pattern references should match
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_revwalk_push_glob(git_revwalk *walk, const char *glob);
  
  /**
   * Push the repository's HEAD
   *
   * @param walk the walker being used for the traversal
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_revwalk_push_head(git_revwalk *walk);
  
  /**
   * Mark a commit (and its ancestors) uninteresting for the output.
   *
   * The given id must belong to a committish on the walked
   * repository.
   *
   * The resolved commit and all its parents will be hidden from the
   * output on the revision walk.
   *
   * @param walk the walker being used for the traversal.
   * @param commit_id the oid of commit that will be ignored during the traversal
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_revwalk_hide(git_revwalk *walk, const git_oid *commit_id);
  
  /**
   * Hide matching references.
   *
   * The OIDs pointed to by the references that match the given glob
   * pattern and their ancestors will be hidden from the output on the
   * revision walk.
   *
   * A leading 'refs/' is implied if not present as well as a trailing
   * '/\*' if the glob lacks '?', '\*' or '['.
   *
   * Any references matching this glob which do not point to a
   * committish will be ignored.
   *
   * @param walk the walker being used for the traversal
   * @param glob the glob pattern references should match
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_revwalk_hide_glob(git_revwalk *walk, const char *glob);
  
  /**
   * Hide the repository's HEAD
   *
   * @param walk the walker being used for the traversal
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_revwalk_hide_head(git_revwalk *walk);
  
  /**
   * Push the OID pointed to by a reference
   *
   * The reference must point to a committish.
   *
   * @param walk the walker being used for the traversal
   * @param refname the reference to push
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_revwalk_push_ref(git_revwalk *walk, const char *refname);
  
  /**
   * Hide the OID pointed to by a reference
   *
   * The reference must point to a committish.
   *
   * @param walk the walker being used for the traversal
   * @param refname the reference to hide
   * @return 0 or an error code
   */
  GIT_EXTERN(int) git_revwalk_hide_ref(git_revwalk *walk, const char *refname);
  
  /**
   * Get the next commit from the revision walk.
   *
   * The initial call to this method is *not* blocking when
   * iterating through a repo with a time-sorting mode.
   *
   * Iterating with Topological or inverted modes makes the initial
   * call blocking to preprocess the commit list, but this block should be
   * mostly unnoticeable on most repositories (topological preprocessing
   * times at 0.3s on the git.git repo).
   *
   * The revision walker is reset when the walk is over.
   *
   * @param out Pointer where to store the oid of the next commit
   * @param walk the walker to pop the commit from.
   * @return 0 if the next commit was found;
   *	GIT_ITEROVER if there are no commits left to iterate
   */
  GIT_EXTERN(int) git_revwalk_next(git_oid *out, git_revwalk *walk);
  
  /**
   * Change the sorting mode when iterating through the
   * repository's contents.
   *
   * Changing the sorting mode resets the walker.
   *
   * @param walk the walker being used for the traversal.
   * @param sort_mode combination of GIT_SORT_XXX flags
   */
  GIT_EXTERN(void) git_revwalk_sorting(git_revwalk *walk, unsigned int sort_mode);
  
  /**
   * Push and hide the respective endpoints of the given range.
   *
   * The range should be of the form
   *   <commit>..<commit>
   * where each <commit> is in the form accepted by 'git_revparse_single'.
   * The left-hand commit will be hidden and the right-hand commit pushed.
   *
   * @param walk the walker being used for the traversal
   * @param range the range
   * @return 0 or an error code
   *
   */
  GIT_EXTERN(int) git_revwalk_push_range(git_revwalk *walk, const char *range);
  
  /**
   * Simplify the history by first-parent
   *
   * No parents other than the first for each commit will be enqueued.
   */
  GIT_EXTERN(void) git_revwalk_simplify_first_parent(git_revwalk *walk);
  
  
  /**
   * Free a revision walker previously allocated.
   *
   * @param walk traversal handle to close. If NULL nothing occurs.
   */
  GIT_EXTERN(void) git_revwalk_free(git_revwalk *walk);
  
  /**
   * Return the repository on which this walker
   * is operating.
   *
   * @param walk the revision walker
   * @return the repository being walked
   */
  GIT_EXTERN(git_repository *) git_revwalk_repository(git_revwalk *walk);
  
  /**
   * This is a callback function that user can provide to hide a
   * commit and its parents. If the callback function returns non-zero value,
   * then this commit and its parents will be hidden.
   *
   * @param commit_id oid of Commit
   * @param payload User-specified pointer to data to be passed as data payload
   */
  typedef int GIT_CALLBACK(git_revwalk_hide_cb)(
  	const git_oid *commit_id,
  	void *payload);
  
  /**
   * Adds, changes or removes a callback function to hide a commit and its parents
   *
   * @param walk the revision walker
   * @param hide_cb  callback function to hide a commit and its parents
   * @param payload  data payload to be passed to callback function
   */
  GIT_EXTERN(int) git_revwalk_add_hide_cb(
  	git_revwalk *walk,
  	git_revwalk_hide_cb hide_cb,
  	void *payload);
  
  /** @} */
  GIT_END_DECL
  #endif
  

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