thodg/libgit2/src/odb.c

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• Hash : 7b6e8067
  Author :
  Date : 2008-12-10T18:31:28
  

  Add some git_otype string conversion and testing routines Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

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• src/odb.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 "git/odb.h"
  #include "util.h"
  
  struct git_odb {
  	/** Path to the "objects" directory. */
  	char *path;
  
  	/** Alternate databases to search. */
  	git_odb **alternates;
  };
  
  static struct {
  	const char *str;   /* type name string */
  	int        loose;  /* valid loose object type flag */
  } obj_type_table [] = {
  	{ "",          0 },  /* 0 = GIT_OBJ__EXT1     */
  	{ "commit",    1 },  /* 1 = GIT_OBJ_COMMIT    */
  	{ "tree",      1 },  /* 2 = GIT_OBJ_TREE      */
  	{ "blob",      1 },  /* 3 = GIT_OBJ_BLOB      */
  	{ "tag",       1 },  /* 4 = GIT_OBJ_TAG       */
  	{ "",          0 },  /* 5 = GIT_OBJ__EXT2     */
  	{ "OFS_DELTA", 0 },  /* 6 = GIT_OBJ_OFS_DELTA */
  	{ "REF_DELTA", 0 }   /* 7 = GIT_OBJ_REF_DELTA */
  };
  
  const char *git_obj_type_to_string(git_otype type)
  {
  	if (type < 0 || type >= ARRAY_SIZE(obj_type_table))
  		return "";
  	return obj_type_table[type].str;
  }
  
  git_otype git_obj_string_to_type(const char *str)
  {
  	int i;
  
  	if (!str || !*str)
  		return GIT_OBJ_BAD;
  
  	for (i = 0; i < ARRAY_SIZE(obj_type_table); i++)
  		if (!strcmp(str, obj_type_table[i].str))
  			return (git_otype) i;
  
  	return GIT_OBJ_BAD;
  }
  
  int git_obj__loose_object_type(git_otype type)
  {
  	if (type < 0 || type >= ARRAY_SIZE(obj_type_table))
  		return 0;
  	return obj_type_table[type].loose;
  }
  
  static int open_alternates(git_odb *db)
  {
  	unsigned n = 0;
  
  	db->alternates = malloc(sizeof(*db->alternates) * (n + 1));
  	if (!db->alternates)
  		return GIT_ERROR;
  
  	db->alternates[n] = NULL;
  	return GIT_SUCCESS;
  }
  
  int git_odb_open(git_odb **out, const char *objects_dir)
  {
  	git_odb *db = malloc(sizeof(*db));
  	if (!db)
  		return GIT_ERROR;
  
  	db->path = strdup(objects_dir);
  	if (!db->path) {
  		free(db);
  		return GIT_ERROR;
  	}
  
  	db->alternates = NULL;
  
  	*out = db;
  	return GIT_SUCCESS;
  }
  
  void git_odb_close(git_odb *db)
  {
  	if (!db)
  		return;
  
  	if (db->alternates) {
  		git_odb **alt;
  		for (alt = db->alternates; *alt; alt++)
  			git_odb_close(*alt);
  		free(db->alternates);
  	}
  
  	free(db->path);
  	free(db);
  }
  
  int git_odb_read(
  	git_obj *out,
  	git_odb *db,
  	const git_oid *id)
  {
  attempt:
  	if (!git_odb__read_packed(out, db, id))
  		return GIT_SUCCESS;
  	if (!git_odb__read_loose(out, db, id))
  		return GIT_SUCCESS;
  	if (!db->alternates && !open_alternates(db))
  		goto attempt;
  
  	out->data = NULL;
  	return GIT_ENOTFOUND;
  }
  
  int git_odb__read_loose(git_obj *out, git_odb *db, const git_oid *id)
  {
  	return GIT_SUCCESS;
  }
  
  int git_odb__read_packed(git_obj *out, git_odb *db, const git_oid *id)
  {
  	return GIT_SUCCESS;
  }
  
  

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