add arg avoid modify man call

src/query/inc/qHistogram.h

@@ -67,7 +67,7 @@ void tHistogramDestroy(SHistogramInfo** pHisto);
 
 void tHistogramPrint(SHistogramInfo* pHisto);
 
-int32_t histoBinarySearch(SHistBin* pEntry, int32_t len, double val);
+int32_t histoBinarySearch(SHistBin* pEntry, int32_t len, double val, int32_t maxEntries);
 
 SHeapEntry* tHeapCreate(int32_t numOfEntries);
 void tHeapSort(SHeapEntry* pEntry, int32_t len);

src/query/src/qHistogram.c

@@ -161,8 +161,7 @@ int32_t tHistogramAdd(SHistogramInfo** pHisto, double val) {
   }
 
 #if defined(USE_ARRAYLIST)
-  int32_t idx = histoBinarySearch((*pHisto)->elems, (*pHisto)->numOfEntries, val);
-  if(idx >= (*pHisto)->maxEntries) idx = (*pHisto)->maxEntries - 1;
+  int32_t idx = histoBinarySearch((*pHisto)->elems, (*pHisto)->numOfEntries, val, (*pHisto)->maxEntries);
   assert(idx >= 0 && idx < (*pHisto)->maxEntries && (*pHisto)->elems != NULL);
 
   if ((*pHisto)->elems[idx].val == val && idx >= 0) {
@@ -360,7 +359,7 @@ int32_t tHistogramAdd(SHistogramInfo** pHisto, double val) {
   return 0;
 }
 
-int32_t histoBinarySearch(SHistBin* pEntry, int32_t len, double val) {
+int32_t histoBinarySearch(SHistBin* pEntry, int32_t len, double val, int32_t maxEntries) {
   int32_t end = len - 1;
   int32_t start = 0;
 
@@ -378,6 +377,7 @@ int32_t histoBinarySearch(SHistBin* pEntry, int32_t len, double val) {
   }
 
   int32_t ret = start > end ? start : end;
+  if(ret >= maxEntries) ret = maxEntries - 1;
   if (ret < 0) {
     return 0;
   } else {
@@ -470,7 +470,7 @@ void tHistogramPrint(SHistogramInfo* pHisto) {
  */
 int64_t tHistogramSum(SHistogramInfo* pHisto, double v) {
 #if defined(USE_ARRAYLIST)
-  int32_t slotIdx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, v);
+  int32_t slotIdx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, v, pHisto->maxEntries);
   if (pHisto->elems[slotIdx].val != v) {
     slotIdx -= 1;
 

src/query/tests/histogramTest.cpp

@@ -98,19 +98,19 @@ TEST(testCase, histogram_binary_search) {
     pHisto->elems[i].val = i;
   }
 
-  int32_t idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, 1);
+  int32_t idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, 1, pHisto->maxEntries);
   assert(idx == 1);
 
-  idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, 9);
+  idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, 9, pHisto->maxEntries);
   assert(idx == 9);
 
-  idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, 20);
+  idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, 20, pHisto->maxEntries);
   assert(idx == 10);
 
-  idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, -1);
+  idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, -1, pHisto->maxEntries);
   assert(idx == 0);
 
-  idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, 3.9);
+  idx = histoBinarySearch(pHisto->elems, pHisto->numOfEntries, 3.9, pHisto->maxEntries);
   assert(idx == 4);
 
   free(pHisto);