thodg/libgit2/src/tree.h

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• Hash : f0e693b1
  Author :
  Date : 2021-09-07T17:53:49
  

  str: introduce `git_str` for internal, `git_buf` is external
  
  libgit2 has two distinct requirements that were previously solved by
  `git_buf`.  We require:
  
  1. A general purpose string class that provides a number of utility APIs
     for manipulating data (eg, concatenating, truncating, etc).
  2. A structure that we can use to return strings to callers that they
     can take ownership of.
  
  By using a single class (`git_buf`) for both of these purposes, we have
  confused the API to the point that refactorings are difficult and
  reasoning about correctness is also difficult.
  
  Move the utility class `git_buf` to be called `git_str`: this represents
  its general purpose, as an internal string buffer class.  The name also
  is an homage to Junio Hamano ("gitstr").
  
  The public API remains `git_buf`, and has a much smaller footprint.  It
  is generally only used as an "out" param with strict requirements that
  follow the documentation.  (Exceptions exist for some legacy APIs to
  avoid breaking callers unnecessarily.)
  
  Utility functions exist to convert a user-specified `git_buf` to a
  `git_str` so that we can call internal functions, then converting it
  back again.
  

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• src/tree.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_tree_h__
  #define INCLUDE_tree_h__
  
  #include "common.h"
  
  #include "git2/tree.h"
  #include "repository.h"
  #include "odb.h"
  #include "vector.h"
  #include "strmap.h"
  #include "pool.h"
  
  struct git_tree_entry {
  	uint16_t attr;
  	uint16_t filename_len;
  	const git_oid *oid;
  	const char *filename;
  };
  
  struct git_tree {
  	git_object object;
  	git_odb_object *odb_obj;
  	git_array_t(git_tree_entry) entries;
  };
  
  struct git_treebuilder {
  	git_repository *repo;
  	git_strmap *map;
  	git_str write_cache;
  };
  
  GIT_INLINE(bool) git_tree_entry__is_tree(const struct git_tree_entry *e)
  {
  	return (S_ISDIR(e->attr) && !S_ISGITLINK(e->attr));
  }
  
  void git_tree__free(void *tree);
  int git_tree__parse(void *tree, git_odb_object *obj);
  int git_tree__parse_raw(void *_tree, const char *data, size_t size);
  
  /**
   * Write a tree to the given repository
   */
  int git_tree__write_index(
  	git_oid *oid, git_index *index, git_repository *repo);
  
  /**
   * Obsolete mode kept for compatibility reasons
   */
  #define GIT_FILEMODE_BLOB_GROUP_WRITABLE 0100664
  
  #endif
  

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