thodg/libgit2/src/offmap.c

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• Hash : 84a089da
  Author :
  Date : 2018-12-01T08:50:36
  

  maps: provide return value when deleting entries Currently, the delete functions of maps do not provide a return value. Like this, it is impossible to tell whether the entry has really been deleted or not. Change the implementation to provide either a return value of zero if the entry has been successfully deleted or `GIT_ENOTFOUND` if the key could not be found. Convert callers to the `delete_at` functions to instead use this higher-level interface.

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• src/offmap.c

• /*
   * 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.
   */
  
  #include "offmap.h"
  
  #define kmalloc git__malloc
  #define kcalloc git__calloc
  #define krealloc git__realloc
  #define kreallocarray git__reallocarray
  #define kfree git__free
  #include "khash.h"
  
  __KHASH_TYPE(off, git_off_t, void *)
  
  __KHASH_IMPL(off, static kh_inline, git_off_t, void *, 1, kh_int64_hash_func, kh_int64_hash_equal)
  
  
  int git_offmap_new(git_offmap **out)
  {
  	*out = kh_init(off);
  	GIT_ERROR_CHECK_ALLOC(*out);
  
  	return 0;
  }
  
  void git_offmap_free(git_offmap *map)
  {
  	kh_destroy(off, map);
  }
  
  void git_offmap_clear(git_offmap *map)
  {
  	kh_clear(off, map);
  }
  
  size_t git_offmap_size(git_offmap *map)
  {
  	return kh_size(map);
  }
  
  void *git_offmap_get(git_offmap *map, const git_off_t key)
  {
  	size_t idx = git_offmap_lookup_index(map, key);
  	if (!git_offmap_valid_index(map, idx) ||
  	    !git_offmap_has_data(map, idx))
  		return NULL;
  	return kh_val(map, idx);
  }
  
  int git_offmap_set(git_offmap *map, const git_off_t key, void *value)
  {
  	size_t idx;
  	int rval;
  
  	idx = kh_put(off, map, key, &rval);
  	if (rval < 0)
  		return -1;
  
  	if (rval == 0)
  		kh_key(map, idx) = key;
  
  	kh_val(map, idx) = value;
  
  	return 0;
  }
  
  int git_offmap_delete(git_offmap *map, const git_off_t key)
  {
  	khiter_t idx = git_offmap_lookup_index(map, key);
  	if (!git_offmap_valid_index(map, idx))
  		return GIT_ENOTFOUND;
  	git_offmap_delete_at(map, idx);
  	return 0;
  }
  
  size_t git_offmap_lookup_index(git_offmap *map, const git_off_t key)
  {
  	return kh_get(off, map, key);
  }
  
  int git_offmap_valid_index(git_offmap *map, size_t idx)
  {
  	return idx != kh_end(map);
  }
  
  int git_offmap_exists(git_offmap *map, const git_off_t key)
  {
  	return kh_get(off, map, key) != kh_end(map);
  }
  
  int git_offmap_has_data(git_offmap *map, size_t idx)
  {
  	return kh_exist(map, idx);
  }
  
  git_off_t git_offmap_key_at(git_offmap *map, size_t idx)
  {
  	return kh_key(map, idx);
  }
  
  void *git_offmap_value_at(git_offmap *map, size_t idx)
  {
  	return kh_val(map, idx);
  }
  
  void git_offmap_set_value_at(git_offmap *map, size_t idx, void *value)
  {
  	kh_val(map, idx) = value;
  }
  
  void git_offmap_delete_at(git_offmap *map, size_t idx)
  {
  	kh_del(off, map, idx);
  }
  
  int git_offmap_put(git_offmap *map, const git_off_t key, int *err)
  {
  	return kh_put(off, map, key, err);
  }
  
  void git_offmap_insert(git_offmap *map, const git_off_t key, void *value, int *rval)
  {
  	khiter_t idx = kh_put(off, map, key, rval);
  
  	if ((*rval) >= 0) {
  		if ((*rval) == 0)
  			kh_key(map, idx) = key;
  		kh_val(map, idx) = value;
  	}
  }
  
  size_t git_offmap_begin(git_offmap *map)
  {
  	GIT_UNUSED(map);
  	return 0;
  }
  
  size_t git_offmap_end(git_offmap *map)
  {
  	return map->n_buckets;
  }
  

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