thodg/libgit2/src/odb.h

• Show log

  Commit

• Hash : 77b339f7
  Author :
  Date : 2015-05-12T13:06:33
  

  odb: make the writestream's size a git_off_t
  
  Restricting files to size_t is a silly limitation. The loose backend
  writes to a file directly, so there is no issue in using 63 bits for the
  size.
  
  We still assume that the header is going to fit in 64 bytes, which does
  mean quite a bit smaller files due to the run-length encoding, but it's
  still a much larger size than you would want Git to handle.
  

Download

• src/odb.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_odb_h__
  #define INCLUDE_odb_h__
  
  #include "git2/odb.h"
  #include "git2/oid.h"
  #include "git2/types.h"
  
  #include "vector.h"
  #include "cache.h"
  #include "posix.h"
  #include "filter.h"
  
  #define GIT_OBJECTS_DIR "objects/"
  #define GIT_OBJECT_DIR_MODE 0777
  #define GIT_OBJECT_FILE_MODE 0444
  
  /* DO NOT EXPORT */
  typedef struct {
  	void *data;			/**< Raw, decompressed object data. */
  	size_t len;			/**< Total number of bytes in data. */
  	git_otype type;		/**< Type of this object. */
  } git_rawobj;
  
  /* EXPORT */
  struct git_odb_object {
  	git_cached_obj cached;
  	void *buffer;
  };
  
  /* EXPORT */
  struct git_odb {
  	git_refcount rc;
  	git_vector backends;
  	git_cache own_cache;
  };
  
  /*
   * Hash a git_rawobj internally.
   * The `git_rawobj` is supposed to be previously initialized
   */
  int git_odb__hashobj(git_oid *id, git_rawobj *obj);
  
  /*
   * Format the object header such as it would appear in the on-disk object
   */
  int git_odb__format_object_header(char *hdr, size_t n, git_off_t obj_len, git_otype obj_type);
  /*
   * Hash an open file descriptor.
   * This is a performance call when the contents of a fd need to be hashed,
   * but the fd is already open and we have the size of the contents.
   *
   * Saves us some `stat` calls.
   *
   * The fd is never closed, not even on error. It must be opened and closed
   * by the caller
   */
  int git_odb__hashfd(git_oid *out, git_file fd, size_t size, git_otype type);
  
  /*
   * Hash an open file descriptor applying an array of filters
   * Acts just like git_odb__hashfd with the addition of filters...
   */
  int git_odb__hashfd_filtered(
  	git_oid *out, git_file fd, size_t len, git_otype type, git_filter_list *fl);
  
  /*
   * Hash a `path`, assuming it could be a POSIX symlink: if the path is a
   * symlink, then the raw contents of the symlink will be hashed. Otherwise,
   * this will fallback to `git_odb__hashfd`.
   *
   * The hash type for this call is always `GIT_OBJ_BLOB` because symlinks may
   * only point to blobs.
   */
  int git_odb__hashlink(git_oid *out, const char *path);
  
  /*
   * Generate a GIT_ENOTFOUND error for the ODB.
   */
  int git_odb__error_notfound(const char *message, const git_oid *oid);
  
  /*
   * Generate a GIT_EAMBIGUOUS error for the ODB.
   */
  int git_odb__error_ambiguous(const char *message);
  
  /*
   * Attempt to read object header or just return whole object if it could
   * not be read.
   */
  int git_odb__read_header_or_object(
  	git_odb_object **out, size_t *len_p, git_otype *type_p,
  	git_odb *db, const git_oid *id);
  
  /* fully free the object; internal method, DO NOT EXPORT */
  void git_odb_object__free(void *object);
  
  #endif
  

Download