thodg/libgit2/src/idxmap.c

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• Hash : 3a5a07fc
  Author :
  Date : 2019-05-20T05:37:16
  

  idxmap: safely cast down to khiter_t

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• src/idxmap.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 "idxmap.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(idx, const git_index_entry *, git_index_entry *)
  __KHASH_TYPE(idxicase, const git_index_entry *, git_index_entry *)
  
  /* This is __ac_X31_hash_string but with tolower and it takes the entry's stage into account */
  static kh_inline khint_t idxentry_hash(const git_index_entry *e)
  {
  	const char *s = e->path;
  	khint_t h = (khint_t)git__tolower(*s);
  	if (h) for (++s ; *s; ++s) h = (h << 5) - h + (khint_t)git__tolower(*s);
  	return h + GIT_INDEX_ENTRY_STAGE(e);
  }
  
  #define idxentry_equal(a, b) (GIT_INDEX_ENTRY_STAGE(a) == GIT_INDEX_ENTRY_STAGE(b) && strcmp(a->path, b->path) == 0)
  #define idxentry_icase_equal(a, b) (GIT_INDEX_ENTRY_STAGE(a) == GIT_INDEX_ENTRY_STAGE(b) && strcasecmp(a->path, b->path) == 0)
  
  __KHASH_IMPL(idx, static kh_inline, const git_index_entry *, git_index_entry *, 1, idxentry_hash, idxentry_equal)
  __KHASH_IMPL(idxicase, static kh_inline, const git_index_entry *, git_index_entry *, 1, idxentry_hash, idxentry_icase_equal)
  
  int git_idxmap_new(git_idxmap **out)
  {
  	*out = kh_init(idx);
  	GIT_ERROR_CHECK_ALLOC(*out);
  
  	return 0;
  }
  
  int git_idxmap_icase_new(git_idxmap_icase **out)
  {
  	*out = kh_init(idxicase);
  	GIT_ERROR_CHECK_ALLOC(*out);
  
  	return 0;
  }
  
  void git_idxmap_free(git_idxmap *map)
  {
  	kh_destroy(idx, map);
  }
  
  void git_idxmap_icase_free(git_idxmap_icase *map)
  {
  	kh_destroy(idxicase, map);
  }
  
  void git_idxmap_clear(git_idxmap *map)
  {
  	kh_clear(idx, map);
  }
  
  void git_idxmap_icase_clear(git_idxmap_icase *map)
  {
  	kh_clear(idxicase, map);
  }
  
  int git_idxmap_resize(git_idxmap *map, size_t size)
  {
  	if (!git__is_uint32(size) ||
  	    kh_resize(idx, map, (khiter_t)size) < 0) {
  		git_error_set_oom();
  		return -1;
  	}
  	return 0;
  }
  
  int git_idxmap_icase_resize(git_idxmap_icase *map, size_t size)
  {
  	if (!git__is_uint32(size) ||
  	    kh_resize(idxicase, map, (khiter_t)size) < 0) {
  		git_error_set_oom();
  		return -1;
  	}
  	return 0;
  }
  
  void *git_idxmap_get(git_idxmap *map, const git_index_entry *key)
  {
  	size_t idx = kh_get(idx, map, key);
  	if (idx == kh_end(map) || !kh_exist(map, idx))
  		return NULL;
  	return kh_val(map, idx);
  }
  
  int git_idxmap_set(git_idxmap *map, const git_index_entry *key, void *value)
  {
  	size_t idx;
  	int rval;
  
  	idx = kh_put(idx, 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_idxmap_icase_set(git_idxmap_icase *map, const git_index_entry *key, void *value)
  {
  	size_t idx;
  	int rval;
  
  	idx = kh_put(idxicase, map, key, &rval);
  	if (rval < 0)
  		return -1;
  
  	if (rval == 0)
  		kh_key(map, idx) = key;
  
  	kh_val(map, idx) = value;
  
  	return 0;
  }
  
  void *git_idxmap_icase_get(git_idxmap_icase *map, const git_index_entry *key)
  {
  	size_t idx = kh_get(idxicase, map, key);
  	if (idx == kh_end(map) || !kh_exist(map, idx))
  		return NULL;
  	return kh_val(map, idx);
  }
  
  void git_idxmap_insert(git_idxmap *map, const git_index_entry *key, void *value, int *rval)
  {
  	khiter_t idx = kh_put(idx, map, key, rval);
  
  	if ((*rval) >= 0) {
  		if ((*rval) == 0)
  			kh_key(map, idx) = key;
  		kh_val(map, idx) = value;
  	}
  }
  
  void git_idxmap_icase_insert(git_idxmap_icase *map, const git_index_entry *key, void *value, int *rval)
  {
  	khiter_t idx = kh_put(idxicase, map, key, rval);
  
  	if ((*rval) >= 0) {
  		if ((*rval) == 0)
  			kh_key(map, idx) = key;
  		kh_val(map, idx) = value;
  	}
  }
  
  int git_idxmap_delete(git_idxmap *map, const git_index_entry *key)
  {
  	khiter_t idx = kh_get(idx, map, key);
  	if (idx == kh_end(map))
  		return GIT_ENOTFOUND;
  	kh_del(idx, map, idx);
  	return 0;
  }
  
  int git_idxmap_icase_delete(git_idxmap_icase *map, const git_index_entry *key)
  {
  	khiter_t idx = kh_get(idxicase, map, key);
  	if (idx == kh_end(map))
  		return GIT_ENOTFOUND;
  	kh_del(idxicase, map, idx);
  	return 0;
  }
  

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