[TD-4614]<feature> add equal func to hashTable

src/util/inc/tcompare.h

@@ -27,6 +27,13 @@ extern "C" {
 #define TSDB_PATTERN_NOWILDCARDMATCH 2
 #define TSDB_PATTERN_STRING_MAX_LEN 20
 
+#define FLT_COMPAR_TOL_FACTOR    4
+#define FLT_EQUAL(_x, _y)        (fabs((_x) - (_y)) <= (FLT_COMPAR_TOL_FACTOR * FLT_EPSILON))
+#define FLT_GREATER(_x, _y)      (!FLT_EQUAL((_x), (_y)) && ((_x) > (_y)))
+#define FLT_LESS(_x, _y)         (!FLT_EQUAL((_x), (_y)) && ((_x) < (_y)))
+#define FLT_GREATEREQUAL(_x, _y) (FLT_EQUAL((_x), (_y)) || ((_x) > (_y)))
+#define FLT_LESSEQUAL(_x, _y)    (FLT_EQUAL((_x), (_y)) || ((_x) < (_y)))
+
 #define PATTERN_COMPARE_INFO_INITIALIZER { '%', '_' }
 
 typedef struct SPatternCompareInfo {

src/util/src/tcompare.c

@@ -90,13 +90,10 @@ int32_t compareFloatVal(const void *pLeft, const void *pRight) {
   if (isnan(p2)) {
     return 1;
   }
-
-  float ret = p1 - p2;
-  if (fabs(ret) < FLT_EPSILON) {
+  if (FLT_EQUAL(p1, p2)) {
     return 0;
-  } else {
-    return ret > 0? 1 : -1;
-  }
+  } 
+  return FLT_GREATER(p1, p2) ? 1: -1; 
 }
 
 int32_t compareDoubleVal(const void *pLeft, const void *pRight) {
@@ -114,13 +111,10 @@ int32_t compareDoubleVal(const void *pLeft, const void *pRight) {
   if (isnan(p2)) {
     return 1;
   }
-
-  double ret = p1 - p2;
-  if (fabs(ret) < FLT_EPSILON) {
+  if (FLT_EQUAL(p1, p2)) {
     return 0;
-  } else {
-    return ret > 0? 1 : -1;
-  }
+  } 
+  return FLT_GREATER(p1, p2) ? 1: -1; 
 }
 
 int32_t compareLenPrefixedStr(const void *pLeft, const void *pRight) {

src/util/src/thashutil.c

@@ -26,8 +26,7 @@
     (h) *= 0x85ebca6b; \
     (h) ^= (h) >> 13;  \
     (h) *= 0xc2b2ae35; \
-    (h) ^= (h) >> 16;  \
-  } while (0)
+    (h) ^= (h) >> 16; } while (0)
   
 uint32_t MurmurHash3_32(const char *key, uint32_t len) {
   const uint8_t *data = (const uint8_t *)key;
@@ -84,22 +83,24 @@ uint32_t taosFloatHash(const char *key, uint32_t UNUSED_PARAM(len)) {
   if (isnan(f)) {
     return 0x7fc00000;
   }
-  if (fabs(f - 0.0) < FLT_EPSILON) {
+   
+  if (FLT_EQUAL(f, 0.0)) {
     return 0;
-  }
-  
-  return *(uint32_t *)(key);
+  } 
+  int t = (int)round(f);
+  return (uint32_t)t;
 }
 uint32_t taosDoubleHash(const char *key, uint32_t UNUSED_PARAM(len)) {
   double f = GET_DOUBLE_VAL(key);  
   if (isnan(f)) {
     return 0x7fc00000;
   }
-  if (fabs(f - 0.0) < FLT_EPSILON) {
+
+  if (FLT_EQUAL(f, 0.0)) {
     return 0;
-  }
-  return *(uint32_t *)(key);
-  
+  } 
+  int t = (int)(round(f));
+  return (uint32_t)t;
 }
 uint32_t taosIntHash_64(const char *key, uint32_t UNUSED_PARAM(len)) {
   uint64_t val = *(uint64_t *)key;