ta_minus_dm.c

股票主要技术指标源码

    * in the outReal.
    */
   outIdx = 0;

   /* Trap the case where no smoothing is needed. */
   if( optInTimePeriod <= 1 )
   {
      /* No smoothing needed. Just do a simple DM1
       * for each price bar.
       */
      VALUE_HANDLE_DEREF(outBegIdx) = startIdx;
      today = startIdx-1;
      prevHigh = inHigh[today];
      prevLow  = inLow[today];
      while( today < endIdx )
      {      
         today++;
         tempReal = inHigh[today];
         diffP    = tempReal-prevHigh; /* Plus Delta */
         prevHigh = tempReal;
         tempReal = inLow[today];
         diffM    = prevLow-tempReal;   /* Minus Delta */
         prevLow  = tempReal;
         if( (diffM > 0) && (diffP < diffM) )
         {
            /* Case 2 and 4: +DM=0,-DM=diffM */
            outReal[outIdx++] = diffM;
         }
         else
            outReal[outIdx++] = 0;
      }

      VALUE_HANDLE_DEREF(outNBElement) = outIdx;
      return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
   }

   /* Process the initial DM */
   VALUE_HANDLE_DEREF(outBegIdx) = startIdx;

   prevMinusDM = 0.0;
   today       = startIdx - lookbackTotal;
   prevHigh    = inHigh[today];
   prevLow     = inLow[today];
   i           = optInTimePeriod-1;
   while( i-- > 0 )
   {
      today++;
      tempReal = inHigh[today];
      diffP    = tempReal-prevHigh; /* Plus Delta */
      prevHigh = tempReal;
      tempReal = inLow[today];
      diffM    = prevLow-tempReal;   /* Minus Delta */
      prevLow  = tempReal;

      if( (diffM > 0) && (diffP < diffM) )
      {
         /* Case 2 and 4: +DM=0,-DM=diffM */
         prevMinusDM += diffM;
      }
   }

   /* Process subsequent DM */

   /* Skip the unstable period. */
   i = TA_GLOBALS_UNSTABLE_PERIOD(TA_FUNC_UNST_MINUS_DM,MinusDM);
   while( i-- != 0 )
   {
      today++;
      tempReal = inHigh[today];
      diffP    = tempReal-prevHigh; /* Plus Delta */
      prevHigh = tempReal;
      tempReal = inLow[today];
      diffM    = prevLow-tempReal;   /* Minus Delta */
      prevLow  = tempReal;
      if( (diffM > 0) && (diffP < diffM) )
      {
         /* Case 2 and 4: +DM=0,-DM=diffM */
         prevMinusDM = prevMinusDM - (prevMinusDM/optInTimePeriod) + diffM;
      }
      else
      {
         /* Case 1,3,5 and 7 */
         prevMinusDM = prevMinusDM - (prevMinusDM/optInTimePeriod);
      }
   }

   /* Now start to write the output in
    * the caller provided outReal.
    */
   outReal[0] = prevMinusDM;
   outIdx = 1;

   while( today < endIdx )
   {
      today++;
      tempReal = inHigh[today];
      diffP    = tempReal-prevHigh; /* Plus Delta */
      prevHigh = tempReal;
      tempReal = inLow[today];
      diffM    = prevLow-tempReal;  /* Minus Delta */
      prevLow  = tempReal;

      if( (diffM > 0) && (diffP < diffM) )
      {
         /* Case 2 and 4: +DM=0,-DM=diffM */
         prevMinusDM = prevMinusDM - (prevMinusDM/optInTimePeriod) + diffM;
      }
      else
      {
         /* Case 1,3,5 and 7 */
         prevMinusDM = prevMinusDM - (prevMinusDM/optInTimePeriod);
      }

      outReal[outIdx++] = prevMinusDM;
   }

   VALUE_HANDLE_DEREF(outNBElement) = outIdx;

   return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
}

/**** START GENCODE SECTION 5 - DO NOT DELETE THIS LINE ****/
/* Generated */ 
/* Generated */ #define  USE_SINGLE_PRECISION_INPUT
/* Generated */ #if !defined( _MANAGED ) && !defined( _JAVA )
/* Generated */    #undef   TA_PREFIX
/* Generated */    #define  TA_PREFIX(x) TA_S_##x
/* Generated */ #endif
/* Generated */ #undef   INPUT_TYPE
/* Generated */ #define  INPUT_TYPE float
/* Generated */ #if defined( _MANAGED )
/* Generated */ enum class Core::RetCode Core::MinusDM( int    startIdx,
/* Generated */                                         int    endIdx,
/* Generated */                                         cli::array<float>^ inHigh,
/* Generated */                                         cli::array<float>^ inLow,
/* Generated */                                         int           optInTimePeriod, /* From 1 to 100000 */
/* Generated */                                         [Out]int%    outBegIdx,
/* Generated */                                         [Out]int%    outNBElement,
/* Generated */                                         cli::array<double>^  outReal )
/* Generated */ #elif defined( _JAVA )
/* Generated */ public RetCode minusDM( int    startIdx,
/* Generated */                         int    endIdx,
/* Generated */                         float        inHigh[],
/* Generated */                         float        inLow[],
/* Generated */                         int           optInTimePeriod, /* From 1 to 100000 */
/* Generated */                         MInteger     outBegIdx,
/* Generated */                         MInteger     outNBElement,
/* Generated */                         double        outReal[] )
/* Generated */ #else
/* Generated */ TA_RetCode TA_S_MINUS_DM( int    startIdx,
/* Generated */                           int    endIdx,
/* Generated */                           const float  inHigh[],
/* Generated */                           const float  inLow[],
/* Generated */                           int           optInTimePeriod, /* From 1 to 100000 */
/* Generated */                           int          *outBegIdx,
/* Generated */                           int          *outNBElement,
/* Generated */                           double        outReal[] )
/* Generated */ #endif
/* Generated */ {
/* Generated */    int today, lookbackTotal, outIdx;
/* Generated */    double prevHigh, prevLow, tempReal;
/* Generated */    double prevMinusDM;
/* Generated */    double diffP, diffM;
/* Generated */    int i;
/* Generated */  #ifndef TA_FUNC_NO_RANGE_CHECK
/* Generated */     if( startIdx < 0 )
/* Generated */        return ENUM_VALUE(RetCode,TA_OUT_OF_RANGE_START_INDEX,OutOfRangeStartIndex);
/* Generated */     if( (endIdx < 0) || (endIdx < startIdx))
/* Generated */        return ENUM_VALUE(RetCode,TA_OUT_OF_RANGE_END_INDEX,OutOfRangeEndIndex);
/* Generated */     #if !defined(_JAVA)
/* Generated */     if(!inHigh||!inLow)
/* Generated */        return ENUM_VALUE(RetCode,TA_BAD_PARAM,BadParam);
/* Generated */     #endif 
/* Generated */     if( (int)optInTimePeriod == TA_INTEGER_DEFAULT )
/* Generated */        optInTimePeriod = 14;
/* Generated */     else if( ((int)optInTimePeriod < 1) || ((int)optInTimePeriod > 100000) )
/* Generated */        return ENUM_VALUE(RetCode,TA_BAD_PARAM,BadParam);
/* Generated */     #if !defined(_JAVA)
/* Generated */     if( !outReal )
/* Generated */        return ENUM_VALUE(RetCode,TA_BAD_PARAM,BadParam);
/* Generated */     #endif 
/* Generated */  #endif 
/* Generated */    if( optInTimePeriod > 1 )
/* Generated */       lookbackTotal = optInTimePeriod + TA_GLOBALS_UNSTABLE_PERIOD(TA_FUNC_UNST_MINUS_DM,MinusDM) - 1;
/* Generated */    else
/* Generated */       lookbackTotal = 1;
/* Generated */    if( startIdx < lookbackTotal )
/* Generated */       startIdx = lookbackTotal;
/* Generated */    if( startIdx > endIdx )
/* Generated */    {
/* Generated */       VALUE_HANDLE_DEREF_TO_ZERO(outBegIdx);
/* Generated */       VALUE_HANDLE_DEREF_TO_ZERO(outNBElement);
/* Generated */       return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
/* Generated */    }
/* Generated */    outIdx = 0;
/* Generated */    if( optInTimePeriod <= 1 )
/* Generated */    {
/* Generated */       VALUE_HANDLE_DEREF(outBegIdx) = startIdx;
/* Generated */       today = startIdx-1;
/* Generated */       prevHigh = inHigh[today];
/* Generated */       prevLow  = inLow[today];
/* Generated */       while( today < endIdx )
/* Generated */       {      
/* Generated */          today++;
/* Generated */          tempReal = inHigh[today];
/* Generated */          diffP    = tempReal-prevHigh; 
/* Generated */          prevHigh = tempReal;
/* Generated */          tempReal = inLow[today];
/* Generated */          diffM    = prevLow-tempReal;   
/* Generated */          prevLow  = tempReal;
/* Generated */          if( (diffM > 0) && (diffP < diffM) )
/* Generated */          {
/* Generated */             outReal[outIdx++] = diffM;
/* Generated */          }
/* Generated */          else
/* Generated */             outReal[outIdx++] = 0;
/* Generated */       }
/* Generated */       VALUE_HANDLE_DEREF(outNBElement) = outIdx;
/* Generated */       return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
/* Generated */    }
/* Generated */    VALUE_HANDLE_DEREF(outBegIdx) = startIdx;
/* Generated */    prevMinusDM = 0.0;
/* Generated */    today       = startIdx - lookbackTotal;
/* Generated */    prevHigh    = inHigh[today];
/* Generated */    prevLow     = inLow[today];
/* Generated */    i           = optInTimePeriod-1;
/* Generated */    while( i-- > 0 )
/* Generated */    {
/* Generated */       today++;
/* Generated */       tempReal = inHigh[today];
/* Generated */       diffP    = tempReal-prevHigh; 
/* Generated */       prevHigh = tempReal;
/* Generated */       tempReal = inLow[today];
/* Generated */       diffM    = prevLow-tempReal;   
/* Generated */       prevLow  = tempReal;
/* Generated */       if( (diffM > 0) && (diffP < diffM) )
/* Generated */       {
/* Generated */          prevMinusDM += diffM;
/* Generated */       }
/* Generated */    }
/* Generated */    i = TA_GLOBALS_UNSTABLE_PERIOD(TA_FUNC_UNST_MINUS_DM,MinusDM);
/* Generated */    while( i-- != 0 )
/* Generated */    {
/* Generated */       today++;
/* Generated */       tempReal = inHigh[today];
/* Generated */       diffP    = tempReal-prevHigh; 
/* Generated */       prevHigh = tempReal;
/* Generated */       tempReal = inLow[today];
/* Generated */       diffM    = prevLow-tempReal;   
/* Generated */       prevLow  = tempReal;
/* Generated */       if( (diffM > 0) && (diffP < diffM) )
/* Generated */       {
/* Generated */          prevMinusDM = prevMinusDM - (prevMinusDM/optInTimePeriod) + diffM;
/* Generated */       }
/* Generated */       else
/* Generated */       {
/* Generated */          prevMinusDM = prevMinusDM - (prevMinusDM/optInTimePeriod);
/* Generated */       }
/* Generated */    }
/* Generated */    outReal[0] = prevMinusDM;
/* Generated */    outIdx = 1;
/* Generated */    while( today < endIdx )
/* Generated */    {
/* Generated */       today++;
/* Generated */       tempReal = inHigh[today];
/* Generated */       diffP    = tempReal-prevHigh; 
/* Generated */       prevHigh = tempReal;
/* Generated */       tempReal = inLow[today];
/* Generated */       diffM    = prevLow-tempReal;  
/* Generated */       prevLow  = tempReal;
/* Generated */       if( (diffM > 0) && (diffP < diffM) )
/* Generated */       {
/* Generated */          prevMinusDM = prevMinusDM - (prevMinusDM/optInTimePeriod) + diffM;
/* Generated */       }
/* Generated */       else
/* Generated */       {
/* Generated */          prevMinusDM = prevMinusDM - (prevMinusDM/optInTimePeriod);
/* Generated */       }
/* Generated */       outReal[outIdx++] = prevMinusDM;
/* Generated */    }
/* Generated */    VALUE_HANDLE_DEREF(outNBElement) = outIdx;
/* Generated */    return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
/* Generated */ }
/* Generated */ 
/* Generated */ #if defined( _MANAGED )
/* Generated */ }}} // Close namespace TicTacTec.TA.Lib
/* Generated */ #endif
/**** END GENCODE SECTION 5 - DO NOT DELETE THIS LINE ****/