/* TA-LIB Copyright (c) 1999-2026, Mario Fortier
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
*   notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
*   notice, this list of conditions and the following disclaimer in
*   the documentation and/or other materials provided with the
*   distribution.
*
* - Neither name of author nor the names of its contributors
*   may be used to endorse or promote products derived from this
*   software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/* AUTO-GENERATED by ta_codegen — DO NOT EDIT.
* Source of truth: ta_codegen/input/<name>/  (regenerate: cd ta_codegen/generator && cargo run -- generate)
*/

#include <string.h>
#include <math.h>
#include "ta_func.h"
#include "ta_utility.h"
#include "ta_memory.h"
#include "ta_func_stream_private.h"

/* List of contributors:
 *
 *  Initial  Name/description
 *  -------------------------------------------------------------------
 *  AC       Angelo Ciceri
 *  MF       Mario Fortier
 *  CC       Claude Code (AI assistant)
 *
 *
 * Change history:
 *
 *  MMDDYY BY     Description
 *  -------------------------------------------------------------------
 *  102304 AC     Creation
 *  100426 MF,CC  Remove the outInteger comment, which misstated the values
 */

TA_LIB_API int TA_CDLHAMMER_Lookback( void )
{
   int BodyShort_avgPeriod = TA_Globals->candleSettings[TA_BodyShort].avgPeriod;
   int Near_avgPeriod = TA_Globals->candleSettings[TA_Near].avgPeriod;
   int ShadowLong_avgPeriod = TA_Globals->candleSettings[TA_ShadowLong].avgPeriod;
   int ShadowVeryShort_avgPeriod = TA_Globals->candleSettings[TA_ShadowVeryShort].avgPeriod;
   return max(max(max(BodyShort_avgPeriod,ShadowLong_avgPeriod),ShadowVeryShort_avgPeriod),Near_avgPeriod) + 1;
}

TA_LIB_API int TA_CDLHAMMER_DisplayShift( int outputIdx )
{
   if( outputIdx < 0 || outputIdx >= 1 )
      return INT_MIN;
   return 0;
}

TA_LIB_API TA_RetCode TA_CDLHAMMER( int    startIdx,
                                    int    endIdx,
                                    const double inOpen[],
                                    const double inHigh[],
                                    const double inLow[],
                                    const double inClose[],
                                    int          *outBegIdx,
                                    int          *outNBElement,
                                    int        outInteger[] )
{
   double BodyPeriodTotal;
   double ShadowLongPeriodTotal;
   double ShadowVeryShortPeriodTotal;
   double NearPeriodTotal;
   int i;
   int outIdx;
   int BodyTrailingIdx;
   int ShadowLongTrailingIdx;
   int ShadowVeryShortTrailingIdx;
   int NearTrailingIdx;
   int lookbackTotal;
   int BodyShort_avgPeriod = TA_Globals->candleSettings[TA_BodyShort].avgPeriod;
   int Near_avgPeriod = TA_Globals->candleSettings[TA_Near].avgPeriod;
   int ShadowLong_avgPeriod = TA_Globals->candleSettings[TA_ShadowLong].avgPeriod;
   int ShadowVeryShort_avgPeriod = TA_Globals->candleSettings[TA_ShadowVeryShort].avgPeriod;

   if( (startIdx < 0) || (startIdx > TA_INDEX_MAX) )
      return TA_OUT_OF_RANGE_START_INDEX;
   if( (endIdx < 0) || (endIdx > TA_INDEX_MAX) || (endIdx < startIdx) )
      return TA_OUT_OF_RANGE_END_INDEX;

   if( !inOpen )
      return TA_BAD_PARAM;
   if( !inHigh )
      return TA_BAD_PARAM;
   if( !inLow )
      return TA_BAD_PARAM;
   if( !inClose )
      return TA_BAD_PARAM;
   if( !outBegIdx || !outNBElement )
      return TA_BAD_PARAM;
   if( !outInteger )
      return TA_BAD_PARAM;

   /* Identify the minimum number of price bar needed
    * to calculate at least one output.
    */
   lookbackTotal = TA_CDLHAMMER_Lookback();
   /* Move up the start index if there is not
    * enough initial data.
    */
   if( startIdx < lookbackTotal )
   {
      startIdx = lookbackTotal;
   }
   /* Make sure there is still something to evaluate. */
   if( startIdx > endIdx )
   {
      *outBegIdx= 0;
      *outNBElement= 0;
      return TA_SUCCESS;
   }
   /* Do the calculation using tight loops. */
   /* Add-up the initial period, except for the last value. */
   BodyPeriodTotal = 0;
   BodyTrailingIdx = startIdx - BodyShort_avgPeriod;
   ShadowLongPeriodTotal = 0;
   ShadowLongTrailingIdx = startIdx - ShadowLong_avgPeriod;
   ShadowVeryShortPeriodTotal = 0;
   ShadowVeryShortTrailingIdx = startIdx - ShadowVeryShort_avgPeriod;
   NearPeriodTotal = 0;
   NearTrailingIdx = startIdx - 1 - Near_avgPeriod;
   i = BodyTrailingIdx;
   while( i < startIdx )
   {
      BodyPeriodTotal += TA_CANDLERANGE(BodyShort,i);
      i += 1;
   }
   i = ShadowLongTrailingIdx;
   while( i < startIdx )
   {
      ShadowLongPeriodTotal += TA_CANDLERANGE(ShadowLong,i);
      i += 1;
   }
   i = ShadowVeryShortTrailingIdx;
   while( i < startIdx )
   {
      ShadowVeryShortPeriodTotal += TA_CANDLERANGE(ShadowVeryShort,i);
      i += 1;
   }
   i = NearTrailingIdx;
   while( i < startIdx - 1 )
   {
      NearPeriodTotal += TA_CANDLERANGE(Near,i);
      i += 1;
   }
   i = startIdx;
   /* Proceed with the calculation for the requested range.
    * Must have:
    * - small real body
    * - long lower shadow
    * - no, or very short, upper shadow
    * - body below or near the lows of the previous candle
    * The meaning of "short", "long" and "near the lows" is specified with TA_SetCandleSettings
    */
   outIdx = 0;
   do
   {
      if( fabs(inClose[i] - inOpen[i]) < TA_CANDLEAVERAGE(BodyShort,BodyPeriodTotal,i) && /* small rb */
          (((inClose[i] >= inOpen[i]) ? inOpen[i] : inClose[i]) - inLow[i]) > TA_CANDLEAVERAGE(ShadowLong,ShadowLongPeriodTotal,i) && /* long lower shadow */
          (inHigh[i] - ((inClose[i] >= inOpen[i]) ? inClose[i] : inOpen[i])) < TA_CANDLEAVERAGE(ShadowVeryShort,ShadowVeryShortPeriodTotal,i) && /* very short upper shadow */
          min(inClose[i],inOpen[i]) <= inLow[i - 1] + TA_CANDLEAVERAGE(Near,NearPeriodTotal,i - 1) ) /* rb near the prior candle's lows */
      {
         outInteger[outIdx++] = 100;
      } else 
      {
         outInteger[outIdx++] = 0;
      }
      /* add the current range and subtract the first range: this is done after the pattern recognition
       * when avgPeriod is not 0, that means "compare with the previous candles" (it excludes the current candle)
       */
      BodyPeriodTotal += TA_CANDLERANGE(BodyShort,i) - TA_CANDLERANGE(BodyShort,BodyTrailingIdx);
      ShadowLongPeriodTotal += TA_CANDLERANGE(ShadowLong,i) - TA_CANDLERANGE(ShadowLong,ShadowLongTrailingIdx);
      ShadowVeryShortPeriodTotal += TA_CANDLERANGE(ShadowVeryShort,i) - TA_CANDLERANGE(ShadowVeryShort,ShadowVeryShortTrailingIdx);
      NearPeriodTotal += TA_CANDLERANGE(Near,i - 1) - TA_CANDLERANGE(Near,NearTrailingIdx);
      i += 1;
      BodyTrailingIdx += 1;
      ShadowLongTrailingIdx += 1;
      ShadowVeryShortTrailingIdx += 1;
      NearTrailingIdx += 1;
   } while( i <= endIdx );
   /* All done. Indicate the output limits and return. */
   *outNBElement= outIdx;
   *outBegIdx= startIdx;
   return TA_SUCCESS;
}

TA_RetCode TA_S_CDLHAMMER( int    startIdx,
                           int    endIdx,
                           const float inOpen[],
                           const float inHigh[],
                           const float inLow[],
                           const float inClose[],
                           int          *outBegIdx,
                           int          *outNBElement,
                           int        outInteger[] )
{
   double BodyPeriodTotal;
   double ShadowLongPeriodTotal;
   double ShadowVeryShortPeriodTotal;
   double NearPeriodTotal;
   int i;
   int outIdx;
   int BodyTrailingIdx;
   int ShadowLongTrailingIdx;
   int ShadowVeryShortTrailingIdx;
   int NearTrailingIdx;
   int lookbackTotal;
   int BodyShort_avgPeriod = TA_Globals->candleSettings[TA_BodyShort].avgPeriod;
   int Near_avgPeriod = TA_Globals->candleSettings[TA_Near].avgPeriod;
   int ShadowLong_avgPeriod = TA_Globals->candleSettings[TA_ShadowLong].avgPeriod;
   int ShadowVeryShort_avgPeriod = TA_Globals->candleSettings[TA_ShadowVeryShort].avgPeriod;

   if( (startIdx < 0) || (startIdx > TA_INDEX_MAX) )
      return TA_OUT_OF_RANGE_START_INDEX;
   if( (endIdx < 0) || (endIdx > TA_INDEX_MAX) || (endIdx < startIdx) )
      return TA_OUT_OF_RANGE_END_INDEX;

   if( !inOpen )
      return TA_BAD_PARAM;
   if( !inHigh )
      return TA_BAD_PARAM;
   if( !inLow )
      return TA_BAD_PARAM;
   if( !inClose )
      return TA_BAD_PARAM;
   if( !outBegIdx || !outNBElement )
      return TA_BAD_PARAM;
   if( !outInteger )
      return TA_BAD_PARAM;

   lookbackTotal = TA_CDLHAMMER_Lookback();
   if( startIdx < lookbackTotal )
   {
      startIdx = lookbackTotal;
   }
   if( startIdx > endIdx )
   {
      *outBegIdx= 0;
      *outNBElement= 0;
      return TA_SUCCESS;
   }
   BodyPeriodTotal = 0;
   BodyTrailingIdx = startIdx - BodyShort_avgPeriod;
   ShadowLongPeriodTotal = 0;
   ShadowLongTrailingIdx = startIdx - ShadowLong_avgPeriod;
   ShadowVeryShortPeriodTotal = 0;
   ShadowVeryShortTrailingIdx = startIdx - ShadowVeryShort_avgPeriod;
   NearPeriodTotal = 0;
   NearTrailingIdx = startIdx - 1 - Near_avgPeriod;
   i = BodyTrailingIdx;
   while( i < startIdx )
   {
      BodyPeriodTotal += TA_CANDLERANGE(BodyShort,i);
      i += 1;
   }
   i = ShadowLongTrailingIdx;
   while( i < startIdx )
   {
      ShadowLongPeriodTotal += TA_CANDLERANGE(ShadowLong,i);
      i += 1;
   }
   i = ShadowVeryShortTrailingIdx;
   while( i < startIdx )
   {
      ShadowVeryShortPeriodTotal += TA_CANDLERANGE(ShadowVeryShort,i);
      i += 1;
   }
   i = NearTrailingIdx;
   while( i < startIdx - 1 )
   {
      NearPeriodTotal += TA_CANDLERANGE(Near,i);
      i += 1;
   }
   i = startIdx;
   outIdx = 0;
   do
   {
      if( fabs((double)inClose[i] - (double)inOpen[i]) < TA_CANDLEAVERAGE(BodyShort,BodyPeriodTotal,i) && ((((double)inClose[i] >= (double)inOpen[i]) ? (double)inOpen[i] : (double)inClose[i]) - (double)inLow[i]) > TA_CANDLEAVERAGE(ShadowLong,ShadowLongPeriodTotal,i) && ((double)inHigh[i] - (((double)inClose[i] >= (double)inOpen[i]) ? (double)inClose[i] : (double)inOpen[i])) < TA_CANDLEAVERAGE(ShadowVeryShort,ShadowVeryShortPeriodTotal,i) && min((double)inClose[i],(double)inOpen[i]) <= (double)inLow[i - 1] + TA_CANDLEAVERAGE(Near,NearPeriodTotal,i - 1) )
      {
         outInteger[outIdx++] = 100;
      } else 
      {
         outInteger[outIdx++] = 0;
      }
      BodyPeriodTotal += TA_CANDLERANGE(BodyShort,i) - TA_CANDLERANGE(BodyShort,BodyTrailingIdx);
      ShadowLongPeriodTotal += TA_CANDLERANGE(ShadowLong,i) - TA_CANDLERANGE(ShadowLong,ShadowLongTrailingIdx);
      ShadowVeryShortPeriodTotal += TA_CANDLERANGE(ShadowVeryShort,i) - TA_CANDLERANGE(ShadowVeryShort,ShadowVeryShortTrailingIdx);
      NearPeriodTotal += TA_CANDLERANGE(Near,i - 1) - TA_CANDLERANGE(Near,NearTrailingIdx);
      i += 1;
      BodyTrailingIdx += 1;
      ShadowLongTrailingIdx += 1;
      ShadowVeryShortTrailingIdx += 1;
      NearTrailingIdx += 1;
   } while( i <= endIdx );
   *outNBElement= outIdx;
   *outBegIdx= startIdx;
   return TA_SUCCESS;
}

/**** Streaming API *****/

struct TA_CDLHAMMER_Stream {
   /* The bars this handle has an output for (see TA_CDLHAMMER_OutRange). */
   int outRangeBegIdx;
   int outRangeCount;
   /* The value(s) at the last bar the stream counted (see TA_CDLHAMMER_Value). */
   int cur_outInteger;
   double BodyPeriodTotal;
   double ShadowLongPeriodTotal;
   double ShadowVeryShortPeriodTotal;
   double NearPeriodTotal;
   double lag1_inOpen;
   double lag1_inHigh;
   double lag1_inLow;
   double lag1_inClose;
   int ringPos_BodyTrailingIdx;
   int ringCap_BodyTrailingIdx;
   double *ring_BodyTrailingIdx_derived;
   int ringPos_NearTrailingIdx;
   int ringCap_NearTrailingIdx;
   double *ring_NearTrailingIdx_derived;
   int ringPos_ShadowLongTrailingIdx;
   int ringCap_ShadowLongTrailingIdx;
   double *ring_ShadowLongTrailingIdx_derived;
   int ringPos_ShadowVeryShortTrailingIdx;
   int ringCap_ShadowVeryShortTrailingIdx;
   double *ring_ShadowVeryShortTrailingIdx_derived;
};

/* Private function, not in public API. */
static void TA_CDLHAMMER_ReleaseImpl( struct TA_CDLHAMMER_Stream *sp )
{
   if( !sp ) return;
   if( sp->ring_BodyTrailingIdx_derived ) TA_Free( sp->ring_BodyTrailingIdx_derived );
   if( sp->ring_NearTrailingIdx_derived ) TA_Free( sp->ring_NearTrailingIdx_derived );
   if( sp->ring_ShadowLongTrailingIdx_derived ) TA_Free( sp->ring_ShadowLongTrailingIdx_derived );
   if( sp->ring_ShadowVeryShortTrailingIdx_derived ) TA_Free( sp->ring_ShadowVeryShortTrailingIdx_derived );
   TA_Free( sp );
}

/* Private function, not in public API. */
static void TA_CDLHAMMER_StepImpl( struct TA_CDLHAMMER_Stream *sp, double inOpen, double inHigh, double inLow, double inClose, int *outInteger )
{
   if( sp->ringCap_BodyTrailingIdx == 0 )
   {
      sp->ring_BodyTrailingIdx_derived[0] = TA_STREAM_CANDLERANGE(BodyShort,inOpen,inHigh,inLow,inClose);
   }
   if( sp->ringCap_NearTrailingIdx == 0 )
   {
      sp->ring_NearTrailingIdx_derived[0] = TA_STREAM_CANDLERANGE(Near,inOpen,inHigh,inLow,inClose);
   }
   if( sp->ringCap_ShadowLongTrailingIdx == 0 )
   {
      sp->ring_ShadowLongTrailingIdx_derived[0] = TA_STREAM_CANDLERANGE(ShadowLong,inOpen,inHigh,inLow,inClose);
   }
   if( sp->ringCap_ShadowVeryShortTrailingIdx == 0 )
   {
      sp->ring_ShadowVeryShortTrailingIdx_derived[0] = TA_STREAM_CANDLERANGE(ShadowVeryShort,inOpen,inHigh,inLow,inClose);
   }
   if( fabs(inClose - inOpen) < TA_STREAM_CANDLEAVERAGE(BodyShort,sp->BodyPeriodTotal,inOpen,inHigh,inLow,inClose) && /* small rb */
       (((inClose >= inOpen) ? inOpen : inClose) - inLow) > TA_STREAM_CANDLEAVERAGE(ShadowLong,sp->ShadowLongPeriodTotal,inOpen,inHigh,inLow,inClose) && /* long lower shadow */
       (inHigh - ((inClose >= inOpen) ? inClose : inOpen)) < TA_STREAM_CANDLEAVERAGE(ShadowVeryShort,sp->ShadowVeryShortPeriodTotal,inOpen,inHigh,inLow,inClose) && /* very short upper shadow */
       min(inClose,inOpen) <= sp->lag1_inLow + TA_STREAM_CANDLEAVERAGE(Near,sp->NearPeriodTotal,sp->lag1_inOpen,sp->lag1_inHigh,sp->lag1_inLow,sp->lag1_inClose) ) /* rb near the prior candle's lows */
   {
      *outInteger= 100;
   } else 
   {
      *outInteger= 0;
   }
   /* add the current range and subtract the first range: this is done after the pattern recognition
    * when avgPeriod is not 0, that means "compare with the previous candles" (it excludes the current candle)
    */
   sp->BodyPeriodTotal += TA_STREAM_CANDLERANGE(BodyShort,inOpen,inHigh,inLow,inClose) - sp->ring_BodyTrailingIdx_derived[sp->ringPos_BodyTrailingIdx];
   sp->ShadowLongPeriodTotal += TA_STREAM_CANDLERANGE(ShadowLong,inOpen,inHigh,inLow,inClose) - sp->ring_ShadowLongTrailingIdx_derived[sp->ringPos_ShadowLongTrailingIdx];
   sp->ShadowVeryShortPeriodTotal += TA_STREAM_CANDLERANGE(ShadowVeryShort,inOpen,inHigh,inLow,inClose) - sp->ring_ShadowVeryShortTrailingIdx_derived[sp->ringPos_ShadowVeryShortTrailingIdx];
   sp->NearPeriodTotal += TA_STREAM_CANDLERANGE(Near,sp->lag1_inOpen,sp->lag1_inHigh,sp->lag1_inLow,sp->lag1_inClose) - sp->ring_NearTrailingIdx_derived[sp->ringPos_NearTrailingIdx];
   sp->cur_outInteger = *outInteger;
   sp->lag1_inOpen = inOpen;
   sp->lag1_inHigh = inHigh;
   sp->lag1_inLow = inLow;
   sp->lag1_inClose = inClose;
   sp->ring_BodyTrailingIdx_derived[sp->ringPos_BodyTrailingIdx] = TA_STREAM_CANDLERANGE(BodyShort,inOpen,inHigh,inLow,inClose);
   sp->ringPos_BodyTrailingIdx = sp->ringPos_BodyTrailingIdx + 1;
   if( sp->ringPos_BodyTrailingIdx >= sp->ringCap_BodyTrailingIdx )
   {
      sp->ringPos_BodyTrailingIdx = 0;
   }
   sp->ring_NearTrailingIdx_derived[sp->ringPos_NearTrailingIdx] = TA_STREAM_CANDLERANGE(Near,inOpen,inHigh,inLow,inClose);
   sp->ringPos_NearTrailingIdx = sp->ringPos_NearTrailingIdx + 1;
   if( sp->ringPos_NearTrailingIdx >= sp->ringCap_NearTrailingIdx )
   {
      sp->ringPos_NearTrailingIdx = 0;
   }
   sp->ring_ShadowLongTrailingIdx_derived[sp->ringPos_ShadowLongTrailingIdx] = TA_STREAM_CANDLERANGE(ShadowLong,inOpen,inHigh,inLow,inClose);
   sp->ringPos_ShadowLongTrailingIdx = sp->ringPos_ShadowLongTrailingIdx + 1;
   if( sp->ringPos_ShadowLongTrailingIdx >= sp->ringCap_ShadowLongTrailingIdx )
   {
      sp->ringPos_ShadowLongTrailingIdx = 0;
   }
   sp->ring_ShadowVeryShortTrailingIdx_derived[sp->ringPos_ShadowVeryShortTrailingIdx] = TA_STREAM_CANDLERANGE(ShadowVeryShort,inOpen,inHigh,inLow,inClose);
   sp->ringPos_ShadowVeryShortTrailingIdx = sp->ringPos_ShadowVeryShortTrailingIdx + 1;
   if( sp->ringPos_ShadowVeryShortTrailingIdx >= sp->ringCap_ShadowVeryShortTrailingIdx )
   {
      sp->ringPos_ShadowVeryShortTrailingIdx = 0;
   }
}

static TA_RetCode TA_CDLHAMMER_OpenImpl( struct TA_CDLHAMMER_Stream **stream, const double inOpen[], const double inHigh[], const double inLow[], const double inClose[], int startIdx, int historyLen, int *outBegIdx, int *outNBElement, int outInteger[], int outStride )
{
   struct TA_CDLHAMMER_Stream *sp;
   int endIdx;

   if( !stream ) return TA_BAD_PARAM;
   *stream = NULL;
   if( historyLen < 1 ) return TA_OUT_OF_RANGE_START_INDEX;
   if( historyLen > TA_INDEX_MAX + 1 ) return TA_OUT_OF_RANGE_END_INDEX;
   if( !inOpen || !inHigh || !inLow || !inClose || !outInteger ) return TA_BAD_PARAM;
   if( startIdx > historyLen - 1 )
   {
      *outBegIdx = 0;
      *outNBElement = 0;
      return TA_INSUFFICIENT_HISTORY;
   }

   endIdx = historyLen - 1;

   {
      int BodyShort_avgPeriod = TA_Globals->candleSettings[TA_BodyShort].avgPeriod;
      int Near_avgPeriod = TA_Globals->candleSettings[TA_Near].avgPeriod;
      int ShadowLong_avgPeriod = TA_Globals->candleSettings[TA_ShadowLong].avgPeriod;
      int ShadowVeryShort_avgPeriod = TA_Globals->candleSettings[TA_ShadowVeryShort].avgPeriod;
      double BodyPeriodTotal = 0.0;
      double ShadowLongPeriodTotal = 0.0;
      double ShadowVeryShortPeriodTotal = 0.0;
      double NearPeriodTotal = 0.0;
      int i;
      int outIdx;
      int BodyTrailingIdx;
      int ShadowLongTrailingIdx;
      int ShadowVeryShortTrailingIdx;
      int NearTrailingIdx;
      int lookbackTotal;
      /* Identify the minimum number of price bar needed
       * to calculate at least one output.
       */
      lookbackTotal = TA_CDLHAMMER_Lookback();
      /* Move up the start index if there is not
       * enough initial data.
       */
      if( startIdx < lookbackTotal )
      {
         startIdx = lookbackTotal;
      }
      /* Make sure there is still something to evaluate. */
      if( startIdx > endIdx )
      {
         *outBegIdx= 0;
         *outNBElement= 0;
         return TA_INSUFFICIENT_HISTORY;
      }
      /* Do the calculation using tight loops. */
      /* Add-up the initial period, except for the last value. */
      BodyPeriodTotal = 0;
      BodyTrailingIdx = startIdx - BodyShort_avgPeriod;
      ShadowLongPeriodTotal = 0;
      ShadowLongTrailingIdx = startIdx - ShadowLong_avgPeriod;
      ShadowVeryShortPeriodTotal = 0;
      ShadowVeryShortTrailingIdx = startIdx - ShadowVeryShort_avgPeriod;
      NearPeriodTotal = 0;
      NearTrailingIdx = startIdx - 1 - Near_avgPeriod;
      i = BodyTrailingIdx;
      while( i < startIdx )
      {
         BodyPeriodTotal += TA_CANDLERANGE(BodyShort,i);
         i += 1;
      }
      i = ShadowLongTrailingIdx;
      while( i < startIdx )
      {
         ShadowLongPeriodTotal += TA_CANDLERANGE(ShadowLong,i);
         i += 1;
      }
      i = ShadowVeryShortTrailingIdx;
      while( i < startIdx )
      {
         ShadowVeryShortPeriodTotal += TA_CANDLERANGE(ShadowVeryShort,i);
         i += 1;
      }
      i = NearTrailingIdx;
      while( i < startIdx - 1 )
      {
         NearPeriodTotal += TA_CANDLERANGE(Near,i);
         i += 1;
      }
      i = startIdx;
      /* Proceed with the calculation for the requested range.
       * Must have:
       * - small real body
       * - long lower shadow
       * - no, or very short, upper shadow
       * - body below or near the lows of the previous candle
       * The meaning of "short", "long" and "near the lows" is specified with TA_SetCandleSettings
       */
      outIdx = 0;
      do
      {
         if( fabs(inClose[i] - inOpen[i]) < TA_CANDLEAVERAGE(BodyShort,BodyPeriodTotal,i) && /* small rb */
             (((inClose[i] >= inOpen[i]) ? inOpen[i] : inClose[i]) - inLow[i]) > TA_CANDLEAVERAGE(ShadowLong,ShadowLongPeriodTotal,i) && /* long lower shadow */
             (inHigh[i] - ((inClose[i] >= inOpen[i]) ? inClose[i] : inOpen[i])) < TA_CANDLEAVERAGE(ShadowVeryShort,ShadowVeryShortPeriodTotal,i) && /* very short upper shadow */
             min(inClose[i],inOpen[i]) <= inLow[i - 1] + TA_CANDLEAVERAGE(Near,NearPeriodTotal,i - 1) ) /* rb near the prior candle's lows */
         {
            outInteger[outIdx++ * outStride] = 100;
         } else 
         {
            outInteger[outIdx++ * outStride] = 0;
         }
         /* add the current range and subtract the first range: this is done after the pattern recognition
          * when avgPeriod is not 0, that means "compare with the previous candles" (it excludes the current candle)
          */
         BodyPeriodTotal += TA_CANDLERANGE(BodyShort,i) - TA_CANDLERANGE(BodyShort,BodyTrailingIdx);
         ShadowLongPeriodTotal += TA_CANDLERANGE(ShadowLong,i) - TA_CANDLERANGE(ShadowLong,ShadowLongTrailingIdx);
         ShadowVeryShortPeriodTotal += TA_CANDLERANGE(ShadowVeryShort,i) - TA_CANDLERANGE(ShadowVeryShort,ShadowVeryShortTrailingIdx);
         NearPeriodTotal += TA_CANDLERANGE(Near,i - 1) - TA_CANDLERANGE(Near,NearTrailingIdx);
         i += 1;
         BodyTrailingIdx += 1;
         ShadowLongTrailingIdx += 1;
         ShadowVeryShortTrailingIdx += 1;
         NearTrailingIdx += 1;
      } while( i <= endIdx );
      /* All done. Indicate the output limits and return. */
      *outNBElement= outIdx;
      *outBegIdx= startIdx;

      /* Capture the live batch state into the handle. */
      sp = (struct TA_CDLHAMMER_Stream *)TA_Malloc( sizeof(*sp) );
      if( !sp ) { return TA_ALLOC_ERR; }
      memset( sp, 0, sizeof(*sp) );
      sp->BodyPeriodTotal = BodyPeriodTotal;
      sp->ShadowLongPeriodTotal = ShadowLongPeriodTotal;
      sp->ShadowVeryShortPeriodTotal = ShadowVeryShortPeriodTotal;
      sp->NearPeriodTotal = NearPeriodTotal;
      sp->ringCap_BodyTrailingIdx = (int)(i - BodyTrailingIdx);
      if( sp->ringCap_BodyTrailingIdx < 0 || sp->ringCap_BodyTrailingIdx > historyLen ) { TA_CDLHAMMER_ReleaseImpl( sp ); return TA_INTERNAL_ERROR(238); }
      { size_t allocN = (size_t)(sp->ringCap_BodyTrailingIdx > 0 ? sp->ringCap_BodyTrailingIdx : 1);
        sp->ring_BodyTrailingIdx_derived = (double *)TA_Malloc( sizeof(double) * allocN );
        if( !sp->ring_BodyTrailingIdx_derived ) { TA_CDLHAMMER_ReleaseImpl( sp ); return TA_ALLOC_ERR; }
        { int fillJ;
          for( fillJ = historyLen - sp->ringCap_BodyTrailingIdx; fillJ < historyLen; fillJ++ )
             sp->ring_BodyTrailingIdx_derived[fillJ - (historyLen - sp->ringCap_BodyTrailingIdx)] = TA_STREAM_CANDLERANGE(BodyShort,inOpen[fillJ],inHigh[fillJ],inLow[fillJ],inClose[fillJ]);
        }
      }
      sp->ringPos_BodyTrailingIdx = 0;
      sp->ringCap_NearTrailingIdx = (int)(i - NearTrailingIdx);
      if( sp->ringCap_NearTrailingIdx < 0 || sp->ringCap_NearTrailingIdx > historyLen ) { TA_CDLHAMMER_ReleaseImpl( sp ); return TA_INTERNAL_ERROR(239); }
      { size_t allocN = (size_t)(sp->ringCap_NearTrailingIdx > 0 ? sp->ringCap_NearTrailingIdx : 1);
        sp->ring_NearTrailingIdx_derived = (double *)TA_Malloc( sizeof(double) * allocN );
        if( !sp->ring_NearTrailingIdx_derived ) { TA_CDLHAMMER_ReleaseImpl( sp ); return TA_ALLOC_ERR; }
        { int fillJ;
          for( fillJ = historyLen - sp->ringCap_NearTrailingIdx; fillJ < historyLen; fillJ++ )
             sp->ring_NearTrailingIdx_derived[fillJ - (historyLen - sp->ringCap_NearTrailingIdx)] = TA_STREAM_CANDLERANGE(Near,inOpen[fillJ],inHigh[fillJ],inLow[fillJ],inClose[fillJ]);
        }
      }
      sp->ringPos_NearTrailingIdx = 0;
      sp->ringCap_ShadowLongTrailingIdx = (int)(i - ShadowLongTrailingIdx);
      if( sp->ringCap_ShadowLongTrailingIdx < 0 || sp->ringCap_ShadowLongTrailingIdx > historyLen ) { TA_CDLHAMMER_ReleaseImpl( sp ); return TA_INTERNAL_ERROR(240); }
      { size_t allocN = (size_t)(sp->ringCap_ShadowLongTrailingIdx > 0 ? sp->ringCap_ShadowLongTrailingIdx : 1);
        sp->ring_ShadowLongTrailingIdx_derived = (double *)TA_Malloc( sizeof(double) * allocN );
        if( !sp->ring_ShadowLongTrailingIdx_derived ) { TA_CDLHAMMER_ReleaseImpl( sp ); return TA_ALLOC_ERR; }
        { int fillJ;
          for( fillJ = historyLen - sp->ringCap_ShadowLongTrailingIdx; fillJ < historyLen; fillJ++ )
             sp->ring_ShadowLongTrailingIdx_derived[fillJ - (historyLen - sp->ringCap_ShadowLongTrailingIdx)] = TA_STREAM_CANDLERANGE(ShadowLong,inOpen[fillJ],inHigh[fillJ],inLow[fillJ],inClose[fillJ]);
        }
      }
      sp->ringPos_ShadowLongTrailingIdx = 0;
      sp->ringCap_ShadowVeryShortTrailingIdx = (int)(i - ShadowVeryShortTrailingIdx);
      if( sp->ringCap_ShadowVeryShortTrailingIdx < 0 || sp->ringCap_ShadowVeryShortTrailingIdx > historyLen ) { TA_CDLHAMMER_ReleaseImpl( sp ); return TA_INTERNAL_ERROR(241); }
      { size_t allocN = (size_t)(sp->ringCap_ShadowVeryShortTrailingIdx > 0 ? sp->ringCap_ShadowVeryShortTrailingIdx : 1);
        sp->ring_ShadowVeryShortTrailingIdx_derived = (double *)TA_Malloc( sizeof(double) * allocN );
        if( !sp->ring_ShadowVeryShortTrailingIdx_derived ) { TA_CDLHAMMER_ReleaseImpl( sp ); return TA_ALLOC_ERR; }
        { int fillJ;
          for( fillJ = historyLen - sp->ringCap_ShadowVeryShortTrailingIdx; fillJ < historyLen; fillJ++ )
             sp->ring_ShadowVeryShortTrailingIdx_derived[fillJ - (historyLen - sp->ringCap_ShadowVeryShortTrailingIdx)] = TA_STREAM_CANDLERANGE(ShadowVeryShort,inOpen[fillJ],inHigh[fillJ],inLow[fillJ],inClose[fillJ]);
        }
      }
      sp->ringPos_ShadowVeryShortTrailingIdx = 0;
      sp->lag1_inOpen = inOpen[historyLen - 1];
      sp->lag1_inHigh = inHigh[historyLen - 1];
      sp->lag1_inLow = inLow[historyLen - 1];
      sp->lag1_inClose = inClose[historyLen - 1];
      sp->outRangeBegIdx = *outBegIdx;
      sp->outRangeCount = *outNBElement;
      sp->cur_outInteger = outInteger[(*outNBElement - 1) * outStride];
      *stream = sp;
      return TA_SUCCESS;
   }
}

/* Private function, not in public API. */
TA_RetCode TA_CDLHAMMER_OpenInternal( struct TA_CDLHAMMER_Stream **stream, const double inOpen[], const double inHigh[], const double inLow[], const double inClose[], int startIdx, int historyLen, int *outInteger )
{
   TA_RetCode retCode;
   int dummyBegIdx = 0;
   int dummyNBElement = 0;
   int sink_outInteger = 0;
   retCode = TA_CDLHAMMER_OpenImpl( stream, inOpen, inHigh, inLow, inClose, startIdx, historyLen, &dummyBegIdx, &dummyNBElement, &sink_outInteger, 0 );
   if( retCode == TA_SUCCESS )
   {
      *outInteger = sink_outInteger;
   }
   return retCode;
}

TA_LIB_API TA_RetCode TA_CDLHAMMER_Open( TA_CDLHAMMER_Stream **stream, const double inOpen[], const double inHigh[], const double inLow[], const double inClose[], int historyLen, int *outInteger )
{
   if( !stream ) return TA_BAD_PARAM;
   *stream = NULL;
   if( historyLen < 1 ) return TA_OUT_OF_RANGE_START_INDEX;
   if( historyLen > TA_INDEX_MAX + 1 ) return TA_OUT_OF_RANGE_END_INDEX;
   if( !inOpen || !inHigh || !inLow || !inClose || !outInteger ) return TA_BAD_PARAM;
   return TA_CDLHAMMER_OpenInternal( stream, inOpen, inHigh, inLow, inClose, 0, historyLen, outInteger );
}

TA_LIB_API TA_RetCode TA_CDLHAMMER_OpenAndFill( TA_CDLHAMMER_Stream **stream, const double inOpen[], const double inHigh[], const double inLow[], const double inClose[], int historyLen, int *outBegIdx, int *outNBElement, int outInteger[] )
{
   if( !stream ) return TA_BAD_PARAM;
   *stream = NULL;
   if( historyLen < 1 ) return TA_OUT_OF_RANGE_START_INDEX;
   if( historyLen > TA_INDEX_MAX + 1 ) return TA_OUT_OF_RANGE_END_INDEX;
   if( !inOpen || !inHigh || !inLow || !inClose || !outBegIdx || !outNBElement || !outInteger ) return TA_BAD_PARAM;
   if( (const void *)outInteger == (const void *)inOpen || (const void *)outInteger == (const void *)inHigh || (const void *)outInteger == (const void *)inLow || (const void *)outInteger == (const void *)inClose ) return TA_BAD_PARAM;
   return TA_CDLHAMMER_OpenAndFillInternal( stream, inOpen, inHigh, inLow, inClose, 0, historyLen, outBegIdx, outNBElement, outInteger );
}

/* Private function, not in public API. */
TA_RetCode TA_CDLHAMMER_OpenAndFillInternal( struct TA_CDLHAMMER_Stream **stream, const double inOpen[], const double inHigh[], const double inLow[], const double inClose[], int startIdx, int historyLen, int *outBegIdx, int *outNBElement, int outInteger[] )
{
   return TA_CDLHAMMER_OpenImpl( stream, inOpen, inHigh, inLow, inClose, startIdx, historyLen, outBegIdx, outNBElement, outInteger, 1 );
}

TA_LIB_API TA_RetCode TA_CDLHAMMER_Update( TA_CDLHAMMER_Stream *stream, double inOpen, double inHigh, double inLow, double inClose, int *outInteger )
{
   if( !stream ) return TA_BAD_PARAM;
   if( stream->outRangeBegIdx + stream->outRangeCount > TA_INDEX_MAX )
      return TA_OUT_OF_RANGE_END_INDEX;
   if( !outInteger ) return TA_BAD_PARAM;
   if( !TA_IS_FINITE( inOpen ) || !TA_IS_FINITE( inHigh ) || !TA_IS_FINITE( inLow ) || !TA_IS_FINITE( inClose ) ) return TA_BAD_PARAM;
   TA_CDLHAMMER_StepImpl( stream, inOpen, inHigh, inLow, inClose, outInteger );
   stream->outRangeCount++;
   return TA_SUCCESS;
}

TA_LIB_API TA_RetCode TA_CDLHAMMER_Peek( const TA_CDLHAMMER_Stream *stream, double inOpen, double inHigh, double inLow, double inClose, int *outInteger )
{
   const struct TA_CDLHAMMER_Stream *sp = stream;

   if( !stream || !outInteger ) return TA_BAD_PARAM;
   if( !TA_IS_FINITE( inOpen ) || !TA_IS_FINITE( inHigh ) || !TA_IS_FINITE( inLow ) || !TA_IS_FINITE( inClose ) ) return TA_BAD_PARAM;
   if( fabs(inClose - inOpen) < TA_STREAM_CANDLEAVERAGE(BodyShort,sp->BodyPeriodTotal,inOpen,inHigh,inLow,inClose) && /* small rb */
       (((inClose >= inOpen) ? inOpen : inClose) - inLow) > TA_STREAM_CANDLEAVERAGE(ShadowLong,sp->ShadowLongPeriodTotal,inOpen,inHigh,inLow,inClose) && /* long lower shadow */
       (inHigh - ((inClose >= inOpen) ? inClose : inOpen)) < TA_STREAM_CANDLEAVERAGE(ShadowVeryShort,sp->ShadowVeryShortPeriodTotal,inOpen,inHigh,inLow,inClose) && /* very short upper shadow */
       min(inClose,inOpen) <= sp->lag1_inLow + TA_STREAM_CANDLEAVERAGE(Near,sp->NearPeriodTotal,sp->lag1_inOpen,sp->lag1_inHigh,sp->lag1_inLow,sp->lag1_inClose) ) /* rb near the prior candle's lows */
   {
      *outInteger= 100;
   } else 
   {
      *outInteger= 0;
   }
   return TA_SUCCESS;
}

TA_LIB_API TA_RetCode TA_CDLHAMMER_Close( TA_CDLHAMMER_Stream *stream )
{
   TA_CDLHAMMER_ReleaseImpl( stream );
   return TA_SUCCESS;
}

TA_LIB_API TA_RetCode TA_CDLHAMMER_Value( const TA_CDLHAMMER_Stream *stream, int *outInteger )
{
   if( !stream || !outInteger ) return TA_BAD_PARAM;
   *outInteger = stream->cur_outInteger;
   return TA_SUCCESS;
}

TA_LIB_API TA_RetCode TA_CDLHAMMER_OutRange( const TA_CDLHAMMER_Stream *stream, int *outBegIdx, int *outNBElement )
{
   if( !stream || !outBegIdx || !outNBElement ) return TA_BAD_PARAM;
   *outBegIdx = stream->outRangeBegIdx;
   *outNBElement = stream->outRangeCount;
   return TA_SUCCESS;
}

TA_LIB_API TA_RetCode TA_CDLHAMMER_Advance( TA_CDLHAMMER_Stream *stream )
{
   if( !stream ) return TA_BAD_PARAM;
   if( stream->outRangeBegIdx + stream->outRangeCount > TA_INDEX_MAX )
      return TA_OUT_OF_RANGE_END_INDEX;
   stream->outRangeCount++;
   return TA_SUCCESS;
}

TA_LIB_API TA_RetCode TA_CDLHAMMER_Clone( const TA_CDLHAMMER_Stream *stream, TA_CDLHAMMER_Stream **clone )
{
   struct TA_CDLHAMMER_Stream *sp;

   if( !clone ) return TA_BAD_PARAM;
   *clone = NULL;
   if( !stream ) return TA_BAD_PARAM;
   sp = (struct TA_CDLHAMMER_Stream *)TA_Malloc( sizeof(*sp) );
   if( !sp ) return TA_ALLOC_ERR;
   *sp = *stream;
   sp->ring_BodyTrailingIdx_derived = NULL;
   sp->ring_NearTrailingIdx_derived = NULL;
   sp->ring_ShadowLongTrailingIdx_derived = NULL;
   sp->ring_ShadowVeryShortTrailingIdx_derived = NULL;
   if( stream->ring_BodyTrailingIdx_derived )
   { size_t copyN = (size_t)(sp->ringCap_BodyTrailingIdx > 0 ? sp->ringCap_BodyTrailingIdx : 1);
     sp->ring_BodyTrailingIdx_derived = (double *)TA_Malloc( sizeof(double) * copyN );
     if( !sp->ring_BodyTrailingIdx_derived ) { TA_CDLHAMMER_Close( sp ); return TA_ALLOC_ERR; }
     memcpy( sp->ring_BodyTrailingIdx_derived, stream->ring_BodyTrailingIdx_derived, sizeof(double) * copyN ); }
   if( stream->ring_NearTrailingIdx_derived )
   { size_t copyN = (size_t)(sp->ringCap_NearTrailingIdx > 0 ? sp->ringCap_NearTrailingIdx : 1);
     sp->ring_NearTrailingIdx_derived = (double *)TA_Malloc( sizeof(double) * copyN );
     if( !sp->ring_NearTrailingIdx_derived ) { TA_CDLHAMMER_Close( sp ); return TA_ALLOC_ERR; }
     memcpy( sp->ring_NearTrailingIdx_derived, stream->ring_NearTrailingIdx_derived, sizeof(double) * copyN ); }
   if( stream->ring_ShadowLongTrailingIdx_derived )
   { size_t copyN = (size_t)(sp->ringCap_ShadowLongTrailingIdx > 0 ? sp->ringCap_ShadowLongTrailingIdx : 1);
     sp->ring_ShadowLongTrailingIdx_derived = (double *)TA_Malloc( sizeof(double) * copyN );
     if( !sp->ring_ShadowLongTrailingIdx_derived ) { TA_CDLHAMMER_Close( sp ); return TA_ALLOC_ERR; }
     memcpy( sp->ring_ShadowLongTrailingIdx_derived, stream->ring_ShadowLongTrailingIdx_derived, sizeof(double) * copyN ); }
   if( stream->ring_ShadowVeryShortTrailingIdx_derived )
   { size_t copyN = (size_t)(sp->ringCap_ShadowVeryShortTrailingIdx > 0 ? sp->ringCap_ShadowVeryShortTrailingIdx : 1);
     sp->ring_ShadowVeryShortTrailingIdx_derived = (double *)TA_Malloc( sizeof(double) * copyN );
     if( !sp->ring_ShadowVeryShortTrailingIdx_derived ) { TA_CDLHAMMER_Close( sp ); return TA_ALLOC_ERR; }
     memcpy( sp->ring_ShadowVeryShortTrailingIdx_derived, stream->ring_ShadowVeryShortTrailingIdx_derived, sizeof(double) * copyN ); }
   *clone = sp;
   return TA_SUCCESS;
}