// Licence at LICENSES/KLIB_LICENSE

/*
  An example:

#include "khash.h"
KHASH_MAP_INIT_INT(32, char)
int main() {
        int ret, is_missing;
        khiter_t k;
        khash_t(32) *h = kh_init(32);
        k = kh_put(32, h, 5, &ret);
        if (!ret) kh_del(32, h, k);
        kh_value(h, k) = 10;
        k = kh_get(32, h, 10);
        is_missing = (k == kh_end(h));
        k = kh_get(32, h, 5);
        kh_del(32, h, k);
        for (k = kh_begin(h); k != kh_end(h); ++k)
                if (kh_exist(h, k)) kh_value(h, k) = 1;
        kh_destroy(32, h);
        return 0;
}
*/

/*
  2011-09-16 (0.2.6):

        * The capacity is a power of 2. This seems to dramatically improve the
          speed for simple keys. Thank Zilong Tan for the suggestion. Reference:

           - https://github.com/stefanocasazza/ULib
           - https://nothings.org/computer/judy/

        * Allow to optionally use linear probing which usually has better
          performance for random input. Double hashing is still the default as
  it is more robust to certain non-random input.

        * Added Wang's integer hash function (not used by default). This hash
          function is more robust to certain non-random input.

  2011-02-14 (0.2.5):

    * Allow to declare global functions.

  2009-09-26 (0.2.4):

    * Improve portability

  2008-09-19 (0.2.3):

        * Corrected the example
        * Improved interfaces

  2008-09-11 (0.2.2):

        * Improved speed a little in kh_put()

  2008-09-10 (0.2.1):

        * Added kh_clear()
        * Fixed a compiling error

  2008-09-02 (0.2.0):

        * Changed to token concatenation which increases flexibility.

  2008-08-31 (0.1.2):

        * Fixed a bug in kh_get(), which has not been tested previously.

  2008-08-31 (0.1.1):

        * Added destructor
*/

#ifndef __AC_KHASH_H
#define __AC_KHASH_H

/*!
  @header

  Generic hash table library.
 */

#define AC_VERSION_KHASH_H "0.2.6"

#include <limits.h>
#include <stdlib.h>
#include <string.h>

// hooks for memory allocator, C-runtime allocator used per default
#ifndef KHASH_MALLOC
#define KHASH_MALLOC malloc
#endif

#ifndef KHASH_REALLOC
#define KHASH_REALLOC realloc
#endif

#ifndef KHASH_CALLOC
#define KHASH_CALLOC calloc
#endif

#ifndef KHASH_FREE
#define KHASH_FREE free
#endif

#if UINT_MAX == 0xffffffffu
typedef unsigned int khuint32_t;
typedef signed int khint32_t;
#elif ULONG_MAX == 0xffffffffu
typedef unsigned long khuint32_t;
typedef signed long khint32_t;
#endif

#if ULONG_MAX == ULLONG_MAX
typedef unsigned long khuint64_t;
typedef signed long khint64_t;
#else
typedef unsigned long long khuint64_t;
typedef signed long long khint64_t;
#endif

#if UINT_MAX == 0xffffu
typedef unsigned int khuint16_t;
typedef signed int khint16_t;
#elif USHRT_MAX == 0xffffu
typedef unsigned short khuint16_t;
typedef signed short khint16_t;
#endif

#if UCHAR_MAX == 0xffu
typedef unsigned char khuint8_t;
typedef signed char khint8_t;
#endif

typedef double khfloat64_t;
typedef float khfloat32_t;

typedef khuint32_t khuint_t;
typedef khuint_t khiter_t;

#define __ac_isempty(flag, i) ((flag[i >> 5] >> (i & 0x1fU)) & 1)
#define __ac_isdel(flag, i) (0)
#define __ac_iseither(flag, i) __ac_isempty(flag, i)
#define __ac_set_isdel_false(flag, i) (0)
#define __ac_set_isempty_false(flag, i) (flag[i >> 5] &= ~(1ul << (i & 0x1fU)))
#define __ac_set_isempty_true(flag, i) (flag[i >> 5] |= (1ul << (i & 0x1fU)))
#define __ac_set_isboth_false(flag, i) __ac_set_isempty_false(flag, i)
#define __ac_set_isdel_true(flag, i) ((void)0)

// specializations of
// https://github.com/aappleby/smhasher/blob/master/src/MurmurHash2.cpp
static inline khuint32_t murmur2_32to32(khuint32_t k) {
  const khuint32_t SEED = 0xc70f6907UL;
  // 'm' and 'r' are mixing constants generated offline.
  // They're not really 'magic', they just happen to work well.
  const khuint32_t M_32 = 0x5bd1e995;
  const int R_32 = 24;

  // Initialize the hash to a 'random' value
  khuint32_t h = SEED ^ 4;

  // handle 4 bytes:
  k *= M_32;
  k ^= k >> R_32;
  k *= M_32;

  h *= M_32;
  h ^= k;

  // Do a few final mixes of the hash to ensure the "last few
  // bytes" are well-incorporated. (Really needed here?)
  h ^= h >> 13;
  h *= M_32;
  h ^= h >> 15;
  return h;
}

// it is possible to have a special x64-version, which would need less
// operations, but using 32bit version always has also some benefits:
//    - one code for 32bit and 64bit builds
//    - the same case for 32bit and 64bit builds
//    - no performance difference could be measured compared to a possible
//    x64-version

static inline khuint32_t murmur2_32_32to32(khuint32_t k1, khuint32_t k2) {
  const khuint32_t SEED = 0xc70f6907UL;
  // 'm' and 'r' are mixing constants generated offline.
  // They're not really 'magic', they just happen to work well.
  const khuint32_t M_32 = 0x5bd1e995;
  const int R_32 = 24;

  // Initialize the hash to a 'random' value
  khuint32_t h = SEED ^ 4;

  // handle first 4 bytes:
  k1 *= M_32;
  k1 ^= k1 >> R_32;
  k1 *= M_32;

  h *= M_32;
  h ^= k1;

  // handle second 4 bytes:
  k2 *= M_32;
  k2 ^= k2 >> R_32;
  k2 *= M_32;

  h *= M_32;
  h ^= k2;

  // Do a few final mixes of the hash to ensure the "last few
  // bytes" are well-incorporated.
  h ^= h >> 13;
  h *= M_32;
  h ^= h >> 15;
  return h;
}

static inline khuint32_t murmur2_64to32(khuint64_t k) {
  khuint32_t k1 = (khuint32_t)k;
  khuint32_t k2 = (khuint32_t)(k >> 32);

  return murmur2_32_32to32(k1, k2);
}

#ifdef KHASH_LINEAR
#define __ac_inc(k, m) 1
#else
#define __ac_inc(k, m) (murmur2_32to32(k) | 1) & (m)
#endif

#define __ac_fsize(m) ((m) < 32 ? 1 : (m) >> 5)

#ifndef kroundup32
#define kroundup32(x)                                                          \
  (--(x), (x) |= (x) >> 1, (x) |= (x) >> 2, (x) |= (x) >> 4, (x) |= (x) >> 8,  \
   (x) |= (x) >> 16, ++(x))
#endif

static const double __ac_HASH_UPPER = 0.77;

#define KHASH_DECLARE(name, khkey_t, khval_t)                                  \
  typedef struct {                                                             \
    khuint_t n_buckets, size, n_occupied, upper_bound;                         \
    khuint32_t *flags;                                                         \
    khkey_t *keys;                                                             \
    khval_t *vals;                                                             \
  } kh_##name##_t;                                                             \
  extern kh_##name##_t *kh_init_##name();                                      \
  extern void kh_destroy_##name(kh_##name##_t *h);                             \
  extern void kh_clear_##name(kh_##name##_t *h);                               \
  extern khuint_t kh_get_##name(const kh_##name##_t *h, khkey_t key);          \
  extern void kh_resize_##name(kh_##name##_t *h, khuint_t new_n_buckets);      \
  extern khuint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret);      \
  extern void kh_del_##name(kh_##name##_t *h, khuint_t x);

#define KHASH_INIT2(name, SCOPE, khkey_t, khval_t, kh_is_map, __hash_func,     \
                    __hash_equal)                                              \
  typedef struct {                                                             \
    khuint_t n_buckets, size, n_occupied, upper_bound;                         \
    khuint32_t *flags;                                                         \
    khkey_t *keys;                                                             \
    khval_t *vals;                                                             \
  } kh_##name##_t;                                                             \
  SCOPE kh_##name##_t *kh_init_##name(void) {                                  \
    return (kh_##name##_t *)KHASH_CALLOC(1, sizeof(kh_##name##_t));            \
  }                                                                            \
  SCOPE void kh_destroy_##name(kh_##name##_t *h) {                             \
    if (h) {                                                                   \
      KHASH_FREE(h->keys);                                                     \
      KHASH_FREE(h->flags);                                                    \
      KHASH_FREE(h->vals);                                                     \
      KHASH_FREE(h);                                                           \
    }                                                                          \
  }                                                                            \
  SCOPE void kh_clear_##name(kh_##name##_t *h) {                               \
    if (h && h->flags) {                                                       \
      memset(h->flags, 0xaa, __ac_fsize(h->n_buckets) * sizeof(khuint32_t));   \
      h->size = h->n_occupied = 0;                                             \
    }                                                                          \
  }                                                                            \
  SCOPE khuint_t kh_get_##name(const kh_##name##_t *h, khkey_t key) {          \
    if (h->n_buckets) {                                                        \
      khuint_t inc, k, i, last, mask;                                          \
      mask = h->n_buckets - 1;                                                 \
      k = __hash_func(key);                                                    \
      i = k & mask;                                                            \
      inc = __ac_inc(k, mask);                                                 \
      last = i; /* inc==1 for linear probing */                                \
      while (!__ac_isempty(h->flags, i) &&                                     \
             (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) {    \
        i = (i + inc) & mask;                                                  \
        if (i == last)                                                         \
          return h->n_buckets;                                                 \
      }                                                                        \
      return __ac_iseither(h->flags, i) ? h->n_buckets : i;                    \
    } else                                                                     \
      return 0;                                                                \
  }                                                                            \
  SCOPE void kh_resize_##name(                                                 \
      kh_##name##_t *h,                                                        \
      khuint_t new_n_buckets) { /* This function uses 0.25*n_bucktes bytes of  \
                                   working space instead of                    \
                                   [sizeof(key_t+val_t)+.25]*n_buckets. */     \
    khuint32_t *new_flags = 0;                                                 \
    khuint_t j = 1;                                                            \
    {                                                                          \
      kroundup32(new_n_buckets);                                               \
      if (new_n_buckets < 4)                                                   \
        new_n_buckets = 4;                                                     \
      if (h->size >= (khuint_t)(new_n_buckets * __ac_HASH_UPPER + 0.5))        \
        j = 0; /* requested size is too small */                               \
      else {   /* hash table size to be changed (shrink or expand); rehash */  \
        new_flags = (khuint32_t *)KHASH_MALLOC(__ac_fsize(new_n_buckets) *     \
                                               sizeof(khuint32_t));            \
        memset(new_flags, 0xff,                                                \
               __ac_fsize(new_n_buckets) * sizeof(khuint32_t));                \
        if (h->n_buckets < new_n_buckets) { /* expand */                       \
          h->keys = (khkey_t *)KHASH_REALLOC(h->keys,                          \
                                             new_n_buckets * sizeof(khkey_t)); \
          if (kh_is_map)                                                       \
            h->vals = (khval_t *)KHASH_REALLOC(h->vals, new_n_buckets *        \
                                                            sizeof(khval_t));  \
        } /* otherwise shrink */                                               \
      }                                                                        \
    }                                                                          \
    if (j) { /* rehashing is needed */                                         \
      for (j = 0; j != h->n_buckets; ++j) {                                    \
        if (__ac_iseither(h->flags, j) == 0) {                                 \
          khkey_t key = h->keys[j];                                            \
          khval_t val;                                                         \
          khuint_t new_mask;                                                   \
          new_mask = new_n_buckets - 1;                                        \
          if (kh_is_map)                                                       \
            val = h->vals[j];                                                  \
          __ac_set_isempty_true(h->flags, j);                                  \
          while (1) { /* kick-out process; sort of like in Cuckoo hashing */   \
            khuint_t inc, k, i;                                                \
            k = __hash_func(key);                                              \
            i = k & new_mask;                                                  \
            inc = __ac_inc(k, new_mask);                                       \
            while (!__ac_isempty(new_flags, i))                                \
              i = (i + inc) & new_mask;                                        \
            __ac_set_isempty_false(new_flags, i);                              \
            if (i < h->n_buckets &&                                            \
                __ac_iseither(h->flags, i) ==                                  \
                    0) { /* kick out the existing element */                   \
              {                                                                \
                khkey_t tmp = h->keys[i];                                      \
                h->keys[i] = key;                                              \
                key = tmp;                                                     \
              }                                                                \
              if (kh_is_map) {                                                 \
                khval_t tmp = h->vals[i];                                      \
                h->vals[i] = val;                                              \
                val = tmp;                                                     \
              }                                                                \
              __ac_set_isempty_true(                                           \
                  h->flags, i); /* mark it as deleted in the old hash table */ \
            } else { /* write the element and jump out of the loop */          \
              h->keys[i] = key;                                                \
              if (kh_is_map)                                                   \
                h->vals[i] = val;                                              \
              break;                                                           \
            }                                                                  \
          }                                                                    \
        }                                                                      \
      }                                                                        \
      if (h->n_buckets > new_n_buckets) { /* shrink the hash table */          \
        h->keys = (khkey_t *)KHASH_REALLOC(h->keys,                            \
                                           new_n_buckets * sizeof(khkey_t));   \
        if (kh_is_map)                                                         \
          h->vals = (khval_t *)KHASH_REALLOC(h->vals,                          \
                                             new_n_buckets * sizeof(khval_t)); \
      }                                                                        \
      KHASH_FREE(h->flags); /* free the working space */                       \
      h->flags = new_flags;                                                    \
      h->n_buckets = new_n_buckets;                                            \
      h->n_occupied = h->size;                                                 \
      h->upper_bound = (khuint_t)(h->n_buckets * __ac_HASH_UPPER + 0.5);       \
    }                                                                          \
  }                                                                            \
  SCOPE khuint_t kh_put_##name(kh_##name##_t *h, khkey_t key, int *ret) {      \
    khuint_t x;                                                                \
    if (h->n_occupied >= h->upper_bound) { /* update the hash table */         \
      if (h->n_buckets > (h->size << 1))                                       \
        kh_resize_##name(h, h->n_buckets - 1); /* clear "deleted" elements */  \
      else                                                                     \
        kh_resize_##name(h, h->n_buckets + 1); /* expand the hash table */     \
    } /* TODO: to implement automatically shrinking; resize() already support  \
         shrinking */                                                          \
    {                                                                          \
      khuint_t inc, k, i, site, last, mask = h->n_buckets - 1;                 \
      x = site = h->n_buckets;                                                 \
      k = __hash_func(key);                                                    \
      i = k & mask;                                                            \
      if (__ac_isempty(h->flags, i))                                           \
        x = i; /* for speed up */                                              \
      else {                                                                   \
        inc = __ac_inc(k, mask);                                               \
        last = i;                                                              \
        while (!__ac_isempty(h->flags, i) &&                                   \
               (__ac_isdel(h->flags, i) || !__hash_equal(h->keys[i], key))) {  \
          if (__ac_isdel(h->flags, i))                                         \
            site = i;                                                          \
          i = (i + inc) & mask;                                                \
          if (i == last) {                                                     \
            x = site;                                                          \
            break;                                                             \
          }                                                                    \
        }                                                                      \
        if (x == h->n_buckets) {                                               \
          if (__ac_isempty(h->flags, i) && site != h->n_buckets)               \
            x = site;                                                          \
          else                                                                 \
            x = i;                                                             \
        }                                                                      \
      }                                                                        \
    }                                                                          \
    if (__ac_isempty(h->flags, x)) { /* not present at all */                  \
      h->keys[x] = key;                                                        \
      __ac_set_isboth_false(h->flags, x);                                      \
      ++h->size;                                                               \
      ++h->n_occupied;                                                         \
      *ret = 1;                                                                \
    } else if (__ac_isdel(h->flags, x)) { /* deleted */                        \
      h->keys[x] = key;                                                        \
      __ac_set_isboth_false(h->flags, x);                                      \
      ++h->size;                                                               \
      *ret = 2;                                                                \
    } else                                                                     \
      *ret = 0; /* Don't touch h->keys[x] if present and not deleted */        \
    return x;                                                                  \
  }                                                                            \
  SCOPE void kh_del_##name(kh_##name##_t *h, khuint_t x) {                     \
    if (x != h->n_buckets && !__ac_iseither(h->flags, x)) {                    \
      __ac_set_isdel_true(h->flags, x);                                        \
      --h->size;                                                               \
    }                                                                          \
  }

#define KHASH_INIT(name, khkey_t, khval_t, kh_is_map, __hash_func,             \
                   __hash_equal)                                               \
  KHASH_INIT2(name, static inline, khkey_t, khval_t, kh_is_map, __hash_func,   \
              __hash_equal)

/* --- BEGIN OF HASH FUNCTIONS --- */

/*! @function
  @abstract     Integer hash function
  @param  key   The integer [khuint32_t]
  @return       The hash value [khuint_t]
 */
#define kh_int_hash_func(key) (khuint32_t)(key)
/*! @function
  @abstract     Integer comparison function
 */
#define kh_int_hash_equal(a, b) ((a) == (b))
/*! @function
  @abstract     64-bit integer hash function
  @param  key   The integer [khuint64_t]
  @return       The hash value [khuint_t]
 */
static inline khuint_t kh_int64_hash_func(khuint64_t key) {
  return (khuint_t)((key) >> 33 ^ (key) ^ (key) << 11);
}
/*! @function
  @abstract     64-bit integer comparison function
 */
#define kh_int64_hash_equal(a, b) ((a) == (b))

/*! @function
  @abstract     const char* hash function
  @param  s     Pointer to a null terminated string
  @return       The hash value
 */
static inline khuint_t __ac_X31_hash_string(const char *s) {
  khuint_t h = *s;
  if (h)
    for (++s; *s; ++s)
      h = (h << 5) - h + *s;
  return h;
}
/*! @function
  @abstract     Another interface to const char* hash function
  @param  key   Pointer to a null terminated string [const char*]
  @return       The hash value [khuint_t]
 */
#define kh_str_hash_func(key) __ac_X31_hash_string(key)
/*! @function
  @abstract     Const char* comparison function
 */
#define kh_str_hash_equal(a, b) (strcmp(a, b) == 0)

static inline khuint_t __ac_Wang_hash(khuint_t key) {
  key += ~(key << 15);
  key ^= (key >> 10);
  key += (key << 3);
  key ^= (key >> 6);
  key += ~(key << 11);
  key ^= (key >> 16);
  return key;
}
#define kh_int_hash_func2(k) __ac_Wang_hash((khuint_t)key)

/* --- END OF HASH FUNCTIONS --- */

/* Other convenient macros... */

/*!
  @abstract Type of the hash table.
  @param  name  Name of the hash table [symbol]
 */
#define khash_t(name) kh_##name##_t

/*! @function
  @abstract     Initiate a hash table.
  @param  name  Name of the hash table [symbol]
  @return       Pointer to the hash table [khash_t(name)*]
 */
#define kh_init(name) kh_init_##name(void)

/*! @function
  @abstract     Destroy a hash table.
  @param  name  Name of the hash table [symbol]
  @param  h     Pointer to the hash table [khash_t(name)*]
 */
#define kh_destroy(name, h) kh_destroy_##name(h)

/*! @function
  @abstract     Reset a hash table without deallocating memory.
  @param  name  Name of the hash table [symbol]
  @param  h     Pointer to the hash table [khash_t(name)*]
 */
#define kh_clear(name, h) kh_clear_##name(h)

/*! @function
  @abstract     Resize a hash table.
  @param  name  Name of the hash table [symbol]
  @param  h     Pointer to the hash table [khash_t(name)*]
  @param  s     New size [khuint_t]
 */
#define kh_resize(name, h, s) kh_resize_##name(h, s)

/*! @function
  @abstract     Insert a key to the hash table.
  @param  name  Name of the hash table [symbol]
  @param  h     Pointer to the hash table [khash_t(name)*]
  @param  k     Key [type of keys]
  @param  r     Extra return code: 0 if the key is present in the hash table;
                1 if the bucket is empty (never used); 2 if the element in
                                the bucket has been deleted [int*]
  @return       Iterator to the inserted element [khuint_t]
 */
#define kh_put(name, h, k, r) kh_put_##name(h, k, r)

/*! @function
  @abstract     Retrieve a key from the hash table.
  @param  name  Name of the hash table [symbol]
  @param  h     Pointer to the hash table [khash_t(name)*]
  @param  k     Key [type of keys]
  @return       Iterator to the found element, or kh_end(h) is the element is
  absent [khuint_t]
 */
#define kh_get(name, h, k) kh_get_##name(h, k)

/*! @function
  @abstract     Remove a key from the hash table.
  @param  name  Name of the hash table [symbol]
  @param  h     Pointer to the hash table [khash_t(name)*]
  @param  k     Iterator to the element to be deleted [khuint_t]
 */
#define kh_del(name, h, k) kh_del_##name(h, k)

/*! @function
  @abstract     Test whether a bucket contains data.
  @param  h     Pointer to the hash table [khash_t(name)*]
  @param  x     Iterator to the bucket [khuint_t]
  @return       1 if containing data; 0 otherwise [int]
 */
#define kh_exist(h, x) (!__ac_iseither((h)->flags, (x)))

/*! @function
  @abstract     Get key given an iterator
  @param  h     Pointer to the hash table [khash_t(name)*]
  @param  x     Iterator to the bucket [khuint_t]
  @return       Key [type of keys]
 */
#define kh_key(h, x) ((h)->keys[x])

/*! @function
  @abstract     Get value given an iterator
  @param  h     Pointer to the hash table [khash_t(name)*]
  @param  x     Iterator to the bucket [khuint_t]
  @return       Value [type of values]
  @discussion   For hash sets, calling this results in segfault.
 */
#define kh_val(h, x) ((h)->vals[x])

/*! @function
  @abstract     Alias of kh_val()
 */
#define kh_value(h, x) ((h)->vals[x])

/*! @function
  @abstract     Get the start iterator
  @param  h     Pointer to the hash table [khash_t(name)*]
  @return       The start iterator [khuint_t]
 */
#define kh_begin(h) (khuint_t)(0)

/*! @function
  @abstract     Get the end iterator
  @param  h     Pointer to the hash table [khash_t(name)*]
  @return       The end iterator [khuint_t]
 */
#define kh_end(h) ((h)->n_buckets)

/*! @function
  @abstract     Get the number of elements in the hash table
  @param  h     Pointer to the hash table [khash_t(name)*]
  @return       Number of elements in the hash table [khuint_t]
 */
#define kh_size(h) ((h)->size)

/*! @function
  @abstract     Get the number of buckets in the hash table
  @param  h     Pointer to the hash table [khash_t(name)*]
  @return       Number of buckets in the hash table [khuint_t]
 */
#define kh_n_buckets(h) ((h)->n_buckets)

/* More convenient interfaces */

/*! @function
  @abstract     Instantiate a hash set containing integer keys
  @param  name  Name of the hash table [symbol]
 */
#define KHASH_SET_INIT_INT(name)                                               \
  KHASH_INIT(name, khint32_t, char, 0, kh_int_hash_func, kh_int_hash_equal)

/*! @function
  @abstract     Instantiate a hash map containing integer keys
  @param  name  Name of the hash table [symbol]
  @param  khval_t  Type of values [type]
 */
#define KHASH_MAP_INIT_INT(name, khval_t)                                      \
  KHASH_INIT(name, khint32_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)

#define KHASH_MAP_INIT_UINT(name, khval_t)                                     \
  KHASH_INIT(name, khuint32_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)

/*! @function
  @abstract     Instantiate a hash map containing 64-bit integer keys
  @param  name  Name of the hash table [symbol]
 */
#define KHASH_SET_INIT_UINT64(name)                                            \
  KHASH_INIT(name, khuint64_t, char, 0, kh_int64_hash_func, kh_int64_hash_equal)

#define KHASH_SET_INIT_INT64(name)                                             \
  KHASH_INIT(name, khint64_t, char, 0, kh_int64_hash_func, kh_int64_hash_equal)

/*! @function
  @abstract     Instantiate a hash map containing 64-bit integer keys
  @param  name  Name of the hash table [symbol]
  @param  khval_t  Type of values [type]
 */
#define KHASH_MAP_INIT_UINT64(name, khval_t)                                   \
  KHASH_INIT(name, khuint64_t, khval_t, 1, kh_int64_hash_func,                 \
             kh_int64_hash_equal)

#define KHASH_MAP_INIT_INT64(name, khval_t)                                    \
  KHASH_INIT(name, khint64_t, khval_t, 1, kh_int64_hash_func,                  \
             kh_int64_hash_equal)

/*! @function
  @abstract     Instantiate a hash map containing 16bit-integer keys
  @param  name  Name of the hash table [symbol]
  @param  khval_t  Type of values [type]
 */
#define KHASH_MAP_INIT_INT16(name, khval_t)                                    \
  KHASH_INIT(name, khint16_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)

#define KHASH_MAP_INIT_UINT16(name, khval_t)                                   \
  KHASH_INIT(name, khuint16_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)

/*! @function
  @abstract     Instantiate a hash map containing 8bit-integer keys
  @param  name  Name of the hash table [symbol]
  @param  khval_t  Type of values [type]
 */
#define KHASH_MAP_INIT_INT8(name, khval_t)                                     \
  KHASH_INIT(name, khint8_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)

#define KHASH_MAP_INIT_UINT8(name, khval_t)                                    \
  KHASH_INIT(name, khuint8_t, khval_t, 1, kh_int_hash_func, kh_int_hash_equal)

typedef const char *kh_cstr_t;
/*! @function
  @abstract     Instantiate a hash map containing const char* keys
  @param  name  Name of the hash table [symbol]
 */
#define KHASH_SET_INIT_STR(name)                                               \
  KHASH_INIT(name, kh_cstr_t, char, 0, kh_str_hash_func, kh_str_hash_equal)

/*! @function
  @abstract     Instantiate a hash map containing const char* keys
  @param  name  Name of the hash table [symbol]
  @param  khval_t  Type of values [type]
 */
#define KHASH_MAP_INIT_STR(name, khval_t)                                      \
  KHASH_INIT(name, kh_cstr_t, khval_t, 1, kh_str_hash_func, kh_str_hash_equal)

#define kh_exist_str(h, k) (kh_exist(h, k))
#define kh_exist_float64(h, k) (kh_exist(h, k))
#define kh_exist_uint64(h, k) (kh_exist(h, k))
#define kh_exist_int64(h, k) (kh_exist(h, k))
#define kh_exist_float32(h, k) (kh_exist(h, k))
#define kh_exist_int32(h, k) (kh_exist(h, k))
#define kh_exist_uint32(h, k) (kh_exist(h, k))
#define kh_exist_int16(h, k) (kh_exist(h, k))
#define kh_exist_uint16(h, k) (kh_exist(h, k))
#define kh_exist_int8(h, k) (kh_exist(h, k))
#define kh_exist_uint8(h, k) (kh_exist(h, k))

KHASH_MAP_INIT_STR(str, size_t)
KHASH_MAP_INIT_INT(int32, size_t)
KHASH_MAP_INIT_UINT(uint32, size_t)
KHASH_MAP_INIT_INT64(int64, size_t)
KHASH_MAP_INIT_UINT64(uint64, size_t)
KHASH_MAP_INIT_INT16(int16, size_t)
KHASH_MAP_INIT_UINT16(uint16, size_t)
KHASH_MAP_INIT_INT8(int8, size_t)
KHASH_MAP_INIT_UINT8(uint8, size_t)

#endif /* __AC_KHASH_H */
