thodg/libgit2/src/tree.c

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• Hash : a7a7ddbe
  Author :
  Date : 2010-09-18T19:16:04
  

  Add generic methods for object writeback git_repository_object has now several internal methods to write back the object information in the repository. - git_repository__dbo_prepare_write() Prepares the DBO object to be modified - git_repository__dbo_write() Writes new bytes to the DBO object - git_repository__dbo_writeback() Writes back the changes to the repository Signed-off-by: Vicent Marti <tanoku@gmail.com>

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• src/tree.c

• /*
   * This file is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License, version 2,
   * as published by the Free Software Foundation.
   *
   * In addition to the permissions in the GNU General Public License,
   * the authors give you unlimited permission to link the compiled
   * version of this file into combinations with other programs,
   * and to distribute those combinations without any restriction
   * coming from the use of this file.  (The General Public License
   * restrictions do apply in other respects; for example, they cover
   * modification of the file, and distribution when not linked into
   * a combined executable.)
   *
   * This file is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; see the file COPYING.  If not, write to
   * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
   * Boston, MA 02110-1301, USA.
   */
  
  #include "common.h"
  #include "commit.h"
  #include "revwalk.h"
  #include "tree.h"
  #include "git/repository.h"
  
  void git_tree__free(git_tree *tree)
  {
  	size_t i;
  
  	for (i = 0; i < tree->entry_count; ++i)
  		free(tree->entries[i].filename);
  
  	free(tree->entries);
  	free(tree);
  }
  
  const git_oid *git_tree_id(git_tree *tree)
  {
  	return &tree->object.id;
  }
  
  git_tree *git_tree_lookup(git_repository *repo, const git_oid *id)
  {
  	return (git_tree *)git_repository_lookup(repo, id, GIT_OBJ_TREE);
  }
  
  unsigned int git_tree_entry_attributes(const git_tree_entry *entry)
  {
  	return entry->attr;
  }
  
  const char *git_tree_entry_name(const git_tree_entry *entry)
  {
  	return entry->filename;
  }
  
  const git_oid *git_tree_entry_id(const git_tree_entry *entry)
  {
  	return &entry->oid;
  }
  
  git_repository_object *git_tree_entry_2object(const git_tree_entry *entry)
  {
  	return git_repository_lookup(entry->owner->object.repo, &entry->oid, GIT_OBJ_ANY);
  }
  
  int entry_cmp(const void *key, const void *array_member)
  {
  	const char *filename = (const char *)key;
  	const git_tree_entry *entry = (const git_tree_entry *)array_member;
  
  	return strcmp(filename, entry->filename);
  }
  
  const git_tree_entry *git_tree_entry_byname(git_tree *tree, const char *filename)
  {
  	return bsearch(filename, tree->entries, tree->entry_count, sizeof(git_tree_entry), entry_cmp);
  }
  
  const git_tree_entry *git_tree_entry_byindex(git_tree *tree, int idx)
  {
  	if (tree->entries == NULL)
  		return NULL;
  
  	return (idx >= 0 && idx < (int)tree->entry_count) ? &tree->entries[idx] : NULL;
  }
  
  size_t git_tree_entrycount(git_tree *tree)
  {
  	return tree->entry_count;
  }
  
  int git_tree__parse(git_tree *tree)
  {
  	static const size_t avg_entry_size = 40;
  
  	int error = 0;
  	char *buffer, *buffer_end;
  	size_t entries_size;
  
  	if (tree->entries != NULL)
  		return GIT_SUCCESS;
  
  	error = git_repository__dbo_open((git_repository_object *)tree);
  	if (error < 0)
  		return error;
  
  	buffer = tree->object.dbo.data;
  	buffer_end = buffer + tree->object.dbo.len;
  
  	tree->entry_count = 0;
  	entries_size = (tree->object.dbo.len / avg_entry_size) + 1;
  	tree->entries = git__malloc(entries_size * sizeof(git_tree_entry));
  
  	while (buffer < buffer_end) {
  		git_tree_entry *entry;
  
  		if (tree->entry_count >= entries_size) {
  			git_tree_entry *new_entries;
  
  			entries_size = entries_size * 2;
  
  			new_entries = git__malloc(entries_size * sizeof(git_tree_entry));
  			memcpy(new_entries, tree->entries, tree->entry_count * sizeof(git_tree_entry));
  
  			free(tree->entries);
  			tree->entries = new_entries;
  		}
  
  		entry = &tree->entries[tree->entry_count++];
  		entry->owner = tree;
  
  		entry->attr = strtol(buffer, &buffer, 8);
  
  		if (*buffer++ != ' ') {
  			error = GIT_EOBJCORRUPTED;
  			break;
  		}
  
  		entry->filename = git__strdup(buffer);
  
  		if (entry->filename == NULL) {
  			error = GIT_EOBJCORRUPTED;
  		}
  
  		buffer += strlen(entry->filename) + 1;
  
  		git_oid_mkraw(&entry->oid, (const unsigned char *)buffer);
  		buffer += GIT_OID_RAWSZ;
  	}
  
  	git_repository__dbo_close((git_repository_object *)tree);
  	return error;
  }
  

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