src/offmap.h

   1 /*
   2  * Copyright (C) 2012 the libgit2 contributors
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7 #ifndef INCLUDE_offmap_h__
   8 #define INCLUDE_offmap_h__
   9
  10 #include "common.h"
  11 #include "git2/types.h"
  12
  13 #define kmalloc git__malloc
  14 #define kcalloc git__calloc
  15 #define krealloc git__realloc
  16 #define kfree git__free
  17 #include "khash.h"
  18
  19 __KHASH_TYPE(off, git_off_t, void *);
  20 typedef khash_t(off) git_offmap;
  21
  22 #define GIT__USE_OFFMAP \
  23         __KHASH_IMPL(off, static kh_inline, git_off_t, void *, 1, kh_int64_hash_func, kh_int64_hash_equal);
  24
  25 #define git_offmap_alloc()  kh_init(off)
  26 #define git_offmap_free(h)  kh_destroy(off, h), h = NULL
  27 #define git_offmap_clear(h) kh_clear(off, h)
  28
  29 #define git_offmap_num_entries(h) kh_size(h)
  30
  31 #define git_offmap_lookup_index(h, k)  kh_get(off, h, k)
  32 #define git_offmap_valid_index(h, idx) (idx != kh_end(h))
  33
  34 #define git_offmap_exists(h, k) (kh_get(off, h, k) != kh_end(h))
  35
  36 #define git_offmap_value_at(h, idx)        kh_val(h, idx)
  37 #define git_offmap_set_value_at(h, idx, v) kh_val(h, idx) = v
  38 #define git_offmap_delete_at(h, idx)       kh_del(off, h, idx)
  39
  40 #define git_offmap_insert(h, key, val, rval) do { \
  41         khiter_t __pos = kh_put(off, h, key, &rval); \
  42         if (rval >= 0) { \
  43                 if (rval == 0) kh_key(h, __pos) = key; \
  44                 kh_val(h, __pos) = val; \
  45         } } while (0)
  46
  47 #define git_offmap_insert2(h, key, val, oldv, rval) do { \
  48         khiter_t __pos = kh_put(off, h, key, &rval); \
  49         if (rval >= 0) { \
  50                 if (rval == 0) { \
  51                         oldv = kh_val(h, __pos); \
  52                         kh_key(h, __pos) = key; \
  53                 } else { oldv = NULL; } \
  54                 kh_val(h, __pos) = val; \
  55         } } while (0)
  56
  57 #define git_offmap_delete(h, key) do { \
  58         khiter_t __pos = git_offmap_lookup_index(h, key); \
  59         if (git_offmap_valid_index(h, __pos)) \
  60                 git_offmap_delete_at(h, __pos); } while (0)
  61
  62 #define git_offmap_foreach              kh_foreach
  63 #define git_offmap_foreach_value        kh_foreach_value
  64
  65 #endif