Commit b76486212890eb043d42d08d14e343280222ae73

Con Kolivas 2013-11-02T21:54:51

Update uthash to latest.

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diff --git a/uthash.h b/uthash.h
index 4cedb9c..72acf11 100644
--- a/uthash.h
+++ b/uthash.h
@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2003-2011, Troy D. Hanson     http://uthash.sourceforge.net
+Copyright (c) 2003-2013, Troy D. Hanson     http://troydhanson.github.com/uthash/
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -22,7 +22,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 #ifndef UTHASH_H
-#define UTHASH_H
+#define UTHASH_H 
 
 #include <string.h>   /* memcmp,strlen */
 #include <stddef.h>   /* ptrdiff_t */
@@ -49,7 +49,7 @@ do {                                                                            
   char **_da_dst = (char**)(&(dst));                                             \
   *_da_dst = (char*)(src);                                                       \
 } while(0)
-#else
+#else 
 #define DECLTYPE_ASSIGN(dst,src)                                                 \
 do {                                                                             \
   (dst) = DECLTYPE(dst)(src);                                                    \
@@ -64,14 +64,24 @@ typedef unsigned char uint8_t;
 #include <inttypes.h>   /* uint32_t */
 #endif
 
-#define UTHASH_VERSION 1.9.4
+#define UTHASH_VERSION 1.9.8
 
+#ifndef uthash_fatal
 #define uthash_fatal(msg) exit(-1)        /* fatal error (out of memory,etc) */
+#endif
+#ifndef uthash_malloc
 #define uthash_malloc(sz) malloc(sz)      /* malloc fcn                      */
+#endif
+#ifndef uthash_free
 #define uthash_free(ptr,sz) free(ptr)     /* free fcn                        */
+#endif
 
+#ifndef uthash_noexpand_fyi
 #define uthash_noexpand_fyi(tbl)          /* can be defined to log noexpand  */
+#endif
+#ifndef uthash_expand_fyi
 #define uthash_expand_fyi(tbl)            /* can be defined to log expands   */
+#endif
 
 /* initial number of buckets */
 #define HASH_INITIAL_NUM_BUCKETS 32      /* initial number of buckets        */
@@ -104,12 +114,12 @@ do {                                                                            
   if (!((tbl)->bloom_bv))  { uthash_fatal( "out of memory"); }                   \
   memset((tbl)->bloom_bv, 0, HASH_BLOOM_BYTELEN);                                \
   (tbl)->bloom_sig = HASH_BLOOM_SIGNATURE;                                       \
-} while (0);
+} while (0) 
 
 #define HASH_BLOOM_FREE(tbl)                                                     \
 do {                                                                             \
   uthash_free((tbl)->bloom_bv, HASH_BLOOM_BYTELEN);                              \
-} while (0);
+} while (0) 
 
 #define HASH_BLOOM_BITSET(bv,idx) (bv[(idx)/8] |= (1U << ((idx)%8)))
 #define HASH_BLOOM_BITTEST(bv,idx) (bv[(idx)/8] & (1U << ((idx)%8)))
@@ -121,10 +131,11 @@ do {                                                                            
   HASH_BLOOM_BITTEST((tbl)->bloom_bv, (hashv & (uint32_t)((1ULL << (tbl)->bloom_nbits) - 1)))
 
 #else
-#define HASH_BLOOM_MAKE(tbl)
-#define HASH_BLOOM_FREE(tbl)
-#define HASH_BLOOM_ADD(tbl,hashv)
+#define HASH_BLOOM_MAKE(tbl) 
+#define HASH_BLOOM_FREE(tbl) 
+#define HASH_BLOOM_ADD(tbl,hashv) 
 #define HASH_BLOOM_TEST(tbl,hashv) (1)
+#define HASH_BLOOM_BYTELEN 0
 #endif
 
 #define HASH_MAKE_TABLE(hh,head)                                                 \
@@ -147,14 +158,24 @@ do {                                                                            
 } while(0)
 
 #define HASH_ADD(hh,head,fieldname,keylen_in,add)                                \
-        HASH_ADD_KEYPTR(hh,head,&add->fieldname,keylen_in,add)
+        HASH_ADD_KEYPTR(hh,head,&((add)->fieldname),keylen_in,add)
 
+#define HASH_REPLACE(hh,head,fieldname,keylen_in,add,replaced)                   \
+do {                                                                             \
+  replaced=NULL;                                                                 \
+  HASH_FIND(hh,head,&((add)->fieldname),keylen_in,replaced);                     \
+  if (replaced!=NULL) {                                                          \
+     HASH_DELETE(hh,head,replaced);                                              \
+  };                                                                             \
+  HASH_ADD(hh,head,fieldname,keylen_in,add);                                     \
+} while(0)
+ 
 #define HASH_ADD_KEYPTR(hh,head,keyptr,keylen_in,add)                            \
 do {                                                                             \
  unsigned _ha_bkt;                                                               \
  (add)->hh.next = NULL;                                                          \
- (add)->hh.key = (char*)keyptr;                                                  \
- (add)->hh.keylen = keylen_in;                                                   \
+ (add)->hh.key = (char*)(keyptr);                                                \
+ (add)->hh.keylen = (unsigned)(keylen_in);                                       \
  if (!(head)) {                                                                  \
     head = (add);                                                                \
     (head)->hh.prev = NULL;                                                      \
@@ -205,17 +226,17 @@ do {                                                                            
         _hd_hh_del = &((delptr)->hh);                                            \
         if ((delptr) == ELMT_FROM_HH((head)->hh.tbl,(head)->hh.tbl->tail)) {     \
             (head)->hh.tbl->tail =                                               \
-                (UT_hash_handle*)((char*)((delptr)->hh.prev) +                   \
+                (UT_hash_handle*)((ptrdiff_t)((delptr)->hh.prev) +               \
                 (head)->hh.tbl->hho);                                            \
         }                                                                        \
         if ((delptr)->hh.prev) {                                                 \
-            ((UT_hash_handle*)((char*)((delptr)->hh.prev) +                      \
+            ((UT_hash_handle*)((ptrdiff_t)((delptr)->hh.prev) +                  \
                     (head)->hh.tbl->hho))->next = (delptr)->hh.next;             \
         } else {                                                                 \
             DECLTYPE_ASSIGN(head,(delptr)->hh.next);                             \
         }                                                                        \
         if (_hd_hh_del->next) {                                                  \
-            ((UT_hash_handle*)((char*)_hd_hh_del->next +                         \
+            ((UT_hash_handle*)((ptrdiff_t)_hd_hh_del->next +                     \
                     (head)->hh.tbl->hho))->prev =                                \
                     _hd_hh_del->prev;                                            \
         }                                                                        \
@@ -232,14 +253,20 @@ do {                                                                            
     HASH_FIND(hh,head,findstr,strlen(findstr),out)
 #define HASH_ADD_STR(head,strfield,add)                                          \
     HASH_ADD(hh,head,strfield,strlen(add->strfield),add)
+#define HASH_REPLACE_STR(head,strfield,add,replaced)                             \
+  HASH_REPLACE(hh,head,strfield,strlen(add->strfield),add,replaced)
 #define HASH_FIND_INT(head,findint,out)                                          \
     HASH_FIND(hh,head,findint,sizeof(int),out)
 #define HASH_ADD_INT(head,intfield,add)                                          \
     HASH_ADD(hh,head,intfield,sizeof(int),add)
+#define HASH_REPLACE_INT(head,intfield,add,replaced)                             \
+    HASH_REPLACE(hh,head,intfield,sizeof(int),add,replaced)
 #define HASH_FIND_PTR(head,findptr,out)                                          \
     HASH_FIND(hh,head,findptr,sizeof(void *),out)
 #define HASH_ADD_PTR(head,ptrfield,add)                                          \
     HASH_ADD(hh,head,ptrfield,sizeof(void *),add)
+#define HASH_REPLACE_PTR(head,ptrfield,add)                                      \
+    HASH_REPLACE(hh,head,ptrfield,sizeof(void *),add,replaced)
 #define HASH_DEL(head,delptr)                                                    \
     HASH_DELETE(hh,head,delptr)
 
@@ -300,10 +327,10 @@ do {                                                                            
     }                                                                            \
 } while (0)
 #else
-#define HASH_FSCK(hh,head)
+#define HASH_FSCK(hh,head) 
 #endif
 
-/* When compiled with -DHASH_EMIT_KEYS, length-prefixed keys are emitted to
+/* When compiled with -DHASH_EMIT_KEYS, length-prefixed keys are emitted to 
  * the descriptor to which this macro is defined for tuning the hash function.
  * The app can #include <unistd.h> to get the prototype for write(2). */
 #ifdef HASH_EMIT_KEYS
@@ -313,12 +340,12 @@ do {                                                                            
     write(HASH_EMIT_KEYS, &_klen, sizeof(_klen));                                \
     write(HASH_EMIT_KEYS, keyptr, fieldlen);                                     \
 } while (0)
-#else
-#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen)
+#else 
+#define HASH_EMIT_KEY(hh,head,keyptr,fieldlen)                    
 #endif
 
 /* default to Jenkin's hash unless overridden e.g. DHASH_FUNCTION=HASH_SAX */
-#ifdef HASH_FUNCTION
+#ifdef HASH_FUNCTION 
 #define HASH_FCN HASH_FUNCTION
 #else
 #define HASH_FCN HASH_JEN
@@ -335,7 +362,7 @@ do {                                                                            
 } while (0)
 
 
-/* SAX/FNV/OAT/JEN hash functions are macro variants of those listed at
+/* SAX/FNV/OAT/JEN hash functions are macro variants of those listed at 
  * http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx */
 #define HASH_SAX(key,keylen,num_bkts,hashv,bkt)                                  \
 do {                                                                             \
@@ -355,8 +382,8 @@ do {                                                                            
   for(_fn_i=0; _fn_i < keylen; _fn_i++)                                          \
       hashv = (hashv * 16777619) ^ _hf_key[_fn_i];                               \
   bkt = hashv & (num_bkts-1);                                                    \
-} while(0);
-
+} while(0) 
+ 
 #define HASH_OAT(key,keylen,num_bkts,hashv,bkt)                                  \
 do {                                                                             \
   unsigned _ho_i;                                                                \
@@ -389,10 +416,10 @@ do {                                                                            
 #define HASH_JEN(key,keylen,num_bkts,hashv,bkt)                                  \
 do {                                                                             \
   unsigned _hj_i,_hj_j,_hj_k;                                                    \
-  char *_hj_key=(char*)(key);                                                    \
+  unsigned char *_hj_key=(unsigned char*)(key);                                  \
   hashv = 0xfeedbeef;                                                            \
   _hj_i = _hj_j = 0x9e3779b9;                                                    \
-  _hj_k = keylen;                                                                \
+  _hj_k = (unsigned)(keylen);                                                      \
   while (_hj_k >= 12) {                                                          \
     _hj_i +=    (_hj_key[0] + ( (unsigned)_hj_key[1] << 8 )                      \
         + ( (unsigned)_hj_key[2] << 16 )                                         \
@@ -440,7 +467,7 @@ do {                                                                            
 #endif
 #define HASH_SFH(key,keylen,num_bkts,hashv,bkt)                                  \
 do {                                                                             \
-  char *_sfh_key=(char*)(key);                                                   \
+  unsigned char *_sfh_key=(unsigned char*)(key);                                 \
   uint32_t _sfh_tmp, _sfh_len = keylen;                                          \
                                                                                  \
   int _sfh_rem = _sfh_len & 3;                                                   \
@@ -450,7 +477,7 @@ do {                                                                            
   /* Main loop */                                                                \
   for (;_sfh_len > 0; _sfh_len--) {                                              \
     hashv    += get16bits (_sfh_key);                                            \
-    _sfh_tmp       = (get16bits (_sfh_key+2) << 11) ^ hashv;                     \
+    _sfh_tmp       = (uint32_t)(get16bits (_sfh_key+2)) << 11  ^ hashv;          \
     hashv     = (hashv << 16) ^ _sfh_tmp;                                        \
     _sfh_key += 2*sizeof (uint16_t);                                             \
     hashv    += hashv >> 11;                                                     \
@@ -460,7 +487,7 @@ do {                                                                            
   switch (_sfh_rem) {                                                            \
     case 3: hashv += get16bits (_sfh_key);                                       \
             hashv ^= hashv << 16;                                                \
-            hashv ^= _sfh_key[sizeof (uint16_t)] << 18;                          \
+            hashv ^= (uint32_t)(_sfh_key[sizeof (uint16_t)] << 18);              \
             hashv += hashv >> 11;                                                \
             break;                                                               \
     case 2: hashv += get16bits (_sfh_key);                                       \
@@ -480,19 +507,19 @@ do {                                                                            
     hashv ^= hashv << 25;                                                        \
     hashv += hashv >> 6;                                                         \
     bkt = hashv & (num_bkts-1);                                                  \
-} while(0);
+} while(0) 
 
 #ifdef HASH_USING_NO_STRICT_ALIASING
 /* The MurmurHash exploits some CPU's (x86,x86_64) tolerance for unaligned reads.
  * For other types of CPU's (e.g. Sparc) an unaligned read causes a bus error.
- * MurmurHash uses the faster approach only on CPU's where we know it's safe.
+ * MurmurHash uses the faster approach only on CPU's where we know it's safe. 
  *
  * Note the preprocessor built-in defines can be emitted using:
  *
  *   gcc -m64 -dM -E - < /dev/null                  (on gcc)
  *   cc -## a.c (where a.c is a simple test file)   (Sun Studio)
  */
-#if (defined(__i386__) || defined(__x86_64__))
+#if (defined(__i386__) || defined(__x86_64__)  || defined(_M_IX86))
 #define MUR_GETBLOCK(p,i) p[i]
 #else /* non intel */
 #define MUR_PLUS0_ALIGNED(p) (((unsigned long)p & 0x3) == 0)
@@ -531,10 +558,12 @@ do {                                                                   \
   uint32_t _mur_h1 = 0xf88D5353;                                       \
   uint32_t _mur_c1 = 0xcc9e2d51;                                       \
   uint32_t _mur_c2 = 0x1b873593;                                       \
+  uint32_t _mur_k1 = 0;                                                \
+  const uint8_t *_mur_tail;                                            \
   const uint32_t *_mur_blocks = (const uint32_t*)(_mur_data+_mur_nblocks*4); \
   int _mur_i;                                                          \
   for(_mur_i = -_mur_nblocks; _mur_i; _mur_i++) {                      \
-    uint32_t _mur_k1 = MUR_GETBLOCK(_mur_blocks,_mur_i);               \
+    _mur_k1 = MUR_GETBLOCK(_mur_blocks,_mur_i);                        \
     _mur_k1 *= _mur_c1;                                                \
     _mur_k1 = MUR_ROTL32(_mur_k1,15);                                  \
     _mur_k1 *= _mur_c2;                                                \
@@ -543,8 +572,8 @@ do {                                                                   \
     _mur_h1 = MUR_ROTL32(_mur_h1,13);                                  \
     _mur_h1 = _mur_h1*5+0xe6546b64;                                    \
   }                                                                    \
-  const uint8_t *_mur_tail = (const uint8_t*)(_mur_data + _mur_nblocks*4); \
-  uint32_t _mur_k1=0;                                                  \
+  _mur_tail = (const uint8_t*)(_mur_data + _mur_nblocks*4);            \
+  _mur_k1=0;                                                           \
   switch((keylen) & 3) {                                               \
     case 3: _mur_k1 ^= _mur_tail[2] << 16;                             \
     case 2: _mur_k1 ^= _mur_tail[1] << 8;                              \
@@ -562,7 +591,7 @@ do {                                                                   \
 #endif  /* HASH_USING_NO_STRICT_ALIASING */
 
 /* key comparison function; return 0 if keys equal */
-#define HASH_KEYCMP(a,b,len) memcmp(a,b,len)
+#define HASH_KEYCMP(a,b,len) memcmp(a,b,len) 
 
 /* iterate over items in a known bucket to find desired item */
 #define HASH_FIND_IN_BKT(tbl,hh,head,keyptr,keylen_in,out)                       \
@@ -570,10 +599,10 @@ do {                                                                            
  if (head.hh_head) DECLTYPE_ASSIGN(out,ELMT_FROM_HH(tbl,head.hh_head));          \
  else out=NULL;                                                                  \
  while (out) {                                                                   \
-    if (out->hh.keylen == keylen_in) {                                           \
-        if ((HASH_KEYCMP(out->hh.key,keyptr,keylen_in)) == 0) break;             \
+    if ((out)->hh.keylen == keylen_in) {                                           \
+        if ((HASH_KEYCMP((out)->hh.key,keyptr,keylen_in)) == 0) break;             \
     }                                                                            \
-    if (out->hh.hh_next) DECLTYPE_ASSIGN(out,ELMT_FROM_HH(tbl,out->hh.hh_next)); \
+    if ((out)->hh.hh_next) DECLTYPE_ASSIGN(out,ELMT_FROM_HH(tbl,(out)->hh.hh_next)); \
     else out = NULL;                                                             \
  }                                                                               \
 } while(0)
@@ -603,36 +632,36 @@ do {                                                                            
     }                                                                            \
     if (hh_del->hh_next) {                                                       \
         hh_del->hh_next->hh_prev = hh_del->hh_prev;                              \
-    }
+    }                                                                
 
 /* Bucket expansion has the effect of doubling the number of buckets
  * and redistributing the items into the new buckets. Ideally the
  * items will distribute more or less evenly into the new buckets
  * (the extent to which this is true is a measure of the quality of
- * the hash function as it applies to the key domain).
- *
+ * the hash function as it applies to the key domain). 
+ * 
  * With the items distributed into more buckets, the chain length
  * (item count) in each bucket is reduced. Thus by expanding buckets
- * the hash keeps a bound on the chain length. This bounded chain
+ * the hash keeps a bound on the chain length. This bounded chain 
  * length is the essence of how a hash provides constant time lookup.
- *
+ * 
  * The calculation of tbl->ideal_chain_maxlen below deserves some
  * explanation. First, keep in mind that we're calculating the ideal
  * maximum chain length based on the *new* (doubled) bucket count.
  * In fractions this is just n/b (n=number of items,b=new num buckets).
- * Since the ideal chain length is an integer, we want to calculate
+ * Since the ideal chain length is an integer, we want to calculate 
  * ceil(n/b). We don't depend on floating point arithmetic in this
  * hash, so to calculate ceil(n/b) with integers we could write
- *
+ * 
  *      ceil(n/b) = (n/b) + ((n%b)?1:0)
- *
+ * 
  * and in fact a previous version of this hash did just that.
  * But now we have improved things a bit by recognizing that b is
  * always a power of two. We keep its base 2 log handy (call it lb),
  * so now we can write this with a bit shift and logical AND:
- *
+ * 
  *      ceil(n/b) = (n>>lb) + ( (n & (b-1)) ? 1:0)
- *
+ * 
  */
 #define HASH_EXPAND_BUCKETS(tbl)                                                 \
 do {                                                                             \
@@ -684,7 +713,7 @@ do {                                                                            
 
 
 /* This is an adaptation of Simon Tatham's O(n log(n)) mergesort */
-/* Note that HASH_SORT assumes the hash handle name to be hh.
+/* Note that HASH_SORT assumes the hash handle name to be hh. 
  * HASH_SRT was added to allow the hash handle name to be passed in. */
 #define HASH_SORT(head,cmpfcn) HASH_SRT(hh,head,cmpfcn)
 #define HASH_SRT(hh,head,cmpfcn)                                                 \
@@ -722,18 +751,22 @@ do {                                                                            
                       _hs_qsize--;                                               \
                   } else if ( (_hs_qsize == 0) || !(_hs_q) ) {                   \
                       _hs_e = _hs_p;                                             \
-                      _hs_p = (UT_hash_handle*)((_hs_p->next) ?                  \
-                              ((void*)((char*)(_hs_p->next) +                    \
-                              (head)->hh.tbl->hho)) : NULL);                     \
+                      if (_hs_p){                                                \
+                        _hs_p = (UT_hash_handle*)((_hs_p->next) ?                \
+                                ((void*)((char*)(_hs_p->next) +                  \
+                                (head)->hh.tbl->hho)) : NULL);                   \
+                       }                                                         \
                       _hs_psize--;                                               \
                   } else if ((                                                   \
                       cmpfcn(DECLTYPE(head)(ELMT_FROM_HH((head)->hh.tbl,_hs_p)), \
                              DECLTYPE(head)(ELMT_FROM_HH((head)->hh.tbl,_hs_q))) \
                              ) <= 0) {                                           \
                       _hs_e = _hs_p;                                             \
-                      _hs_p = (UT_hash_handle*)((_hs_p->next) ?                  \
-                              ((void*)((char*)(_hs_p->next) +                    \
-                              (head)->hh.tbl->hho)) : NULL);                     \
+                      if (_hs_p){                                                \
+                        _hs_p = (UT_hash_handle*)((_hs_p->next) ?                \
+                               ((void*)((char*)(_hs_p->next) +                   \
+                               (head)->hh.tbl->hho)) : NULL);                    \
+                       }                                                         \
                       _hs_psize--;                                               \
                   } else {                                                       \
                       _hs_e = _hs_q;                                             \
@@ -748,13 +781,17 @@ do {                                                                            
                   } else {                                                       \
                       _hs_list = _hs_e;                                          \
                   }                                                              \
+                  if (_hs_e) {                                                   \
                   _hs_e->prev = ((_hs_tail) ?                                    \
                      ELMT_FROM_HH((head)->hh.tbl,_hs_tail) : NULL);              \
+                  }                                                              \
                   _hs_tail = _hs_e;                                              \
               }                                                                  \
               _hs_p = _hs_q;                                                     \
           }                                                                      \
-          _hs_tail->next = NULL;                                                 \
+          if (_hs_tail){                                                         \
+            _hs_tail->next = NULL;                                               \
+          }                                                                      \
           if ( _hs_nmerges <= 1 ) {                                              \
               _hs_looping=0;                                                     \
               (head)->hh.tbl->tail = _hs_tail;                                   \
@@ -766,10 +803,10 @@ do {                                                                            
  }                                                                               \
 } while (0)
 
-/* This function selects items from one hash into another hash.
- * The end result is that the selected items have dual presence
- * in both hashes. There is no copy of the items made; rather
- * they are added into the new hash through a secondary hash
+/* This function selects items from one hash into another hash. 
+ * The end result is that the selected items have dual presence 
+ * in both hashes. There is no copy of the items made; rather 
+ * they are added into the new hash through a secondary hash 
  * hash handle that must be present in the structure. */
 #define HASH_SELECT(hh_dst, dst, hh_src, src, cond)                              \
 do {                                                                             \
@@ -814,15 +851,22 @@ do {                                                                            
   if (head) {                                                                    \
     uthash_free((head)->hh.tbl->buckets,                                         \
                 (head)->hh.tbl->num_buckets*sizeof(struct UT_hash_bucket));      \
+    HASH_BLOOM_FREE((head)->hh.tbl);                                             \
     uthash_free((head)->hh.tbl, sizeof(UT_hash_table));                          \
     (head)=NULL;                                                                 \
   }                                                                              \
 } while(0)
 
+#define HASH_OVERHEAD(hh,head)                                                   \
+ (size_t)((((head)->hh.tbl->num_items   * sizeof(UT_hash_handle))   +            \
+           ((head)->hh.tbl->num_buckets * sizeof(UT_hash_bucket))   +            \
+            (sizeof(UT_hash_table))                                 +            \
+            (HASH_BLOOM_BYTELEN)))
+
 #ifdef NO_DECLTYPE
 #define HASH_ITER(hh,head,el,tmp)                                                \
 for((el)=(head), (*(char**)(&(tmp)))=(char*)((head)?(head)->hh.next:NULL);       \
-  el; (el)=(tmp),(*(char**)(&(tmp)))=(char*)((tmp)?(tmp)->hh.next:NULL))
+  el; (el)=(tmp),(*(char**)(&(tmp)))=(char*)((tmp)?(tmp)->hh.next:NULL)) 
 #else
 #define HASH_ITER(hh,head,el,tmp)                                                \
 for((el)=(head),(tmp)=DECLTYPE(el)((head)?(head)->hh.next:NULL);                 \
@@ -830,7 +874,7 @@ for((el)=(head),(tmp)=DECLTYPE(el)((head)?(head)->hh.next:NULL);                
 #endif
 
 /* obtain a count of items in the hash */
-#define HASH_COUNT(head) HASH_CNT(hh,head)
+#define HASH_COUNT(head) HASH_CNT(hh,head) 
 #define HASH_CNT(hh,head) ((head)?((head)->hh.tbl->num_items):0)
 
 typedef struct UT_hash_bucket {
@@ -839,7 +883,7 @@ typedef struct UT_hash_bucket {
 
    /* expand_mult is normally set to 0. In this situation, the max chain length
     * threshold is enforced at its default value, HASH_BKT_CAPACITY_THRESH. (If
-    * the bucket's chain exceeds this length, bucket expansion is triggered).
+    * the bucket's chain exceeds this length, bucket expansion is triggered). 
     * However, setting expand_mult to a non-zero value delays bucket expansion
     * (that would be triggered by additions to this particular bucket)
     * until its chain length reaches a *multiple* of HASH_BKT_CAPACITY_THRESH.
@@ -847,7 +891,7 @@ typedef struct UT_hash_bucket {
     * multiplier is to reduce bucket expansions, since they are expensive, in
     * situations where we know that a particular bucket tends to be overused.
     * It is better to let its chain length grow to a longer yet-still-bounded
-    * value, than to do an O(n) bucket expansion too often.
+    * value, than to do an O(n) bucket expansion too often. 
     */
    unsigned expand_mult;
 
@@ -873,7 +917,7 @@ typedef struct UT_hash_table {
     * hash distribution; reaching them in a chain traversal takes >ideal steps */
    unsigned nonideal_items;
 
-   /* ineffective expands occur when a bucket doubling was performed, but
+   /* ineffective expands occur when a bucket doubling was performed, but 
     * afterward, more than half the items in the hash had nonideal chain
     * positions. If this happens on two consecutive expansions we inhibit any
     * further expansion, as it's not helping; this happens when the hash