ta_rocr100.c

股票主要技术指标源码

/* Generated */    #if !defined(_JAVA)
/* Generated */    if( !inReal ) return ENUM_VALUE(RetCode,TA_BAD_PARAM,BadParam);
/* Generated */    #endif /* !defined(_JAVA)*/
/* Generated */    /* min/max are checked for optInTimePeriod. */
/* Generated */    if( (int)optInTimePeriod == TA_INTEGER_DEFAULT )
/* Generated */       optInTimePeriod = 10;
/* Generated */    else if( ((int)optInTimePeriod < 1) || ((int)optInTimePeriod > 100000) )
/* Generated */       return ENUM_VALUE(RetCode,TA_BAD_PARAM,BadParam);
/* Generated */ 
/* Generated */    #if !defined(_JAVA)
/* Generated */    if( !outReal )
/* Generated */       return ENUM_VALUE(RetCode,TA_BAD_PARAM,BadParam);
/* Generated */ 
/* Generated */    #endif /* !defined(_JAVA) */
/* Generated */ #endif /* TA_FUNC_NO_RANGE_CHECK */
/* Generated */ 
/**** END GENCODE SECTION 4 - DO NOT DELETE THIS LINE ****/

   /* Insert TA function code here. */

   /* The interpretation of the rate of change varies widely depending
    * which software and/or books you are refering to.
    *
    * The following is the table of Rate-Of-Change implemented in TA-LIB:
    *       MOM     = (price - prevPrice)         [Momentum]
    *       ROC     = ((price/prevPrice)-1)*100   [Rate of change]
    *       ROCP    = (price-prevPrice)/prevPrice [Rate of change Percentage]
    *       ROCR    = (price/prevPrice)           [Rate of change ratio]
    *       ROCR100 = (price/prevPrice)*100       [Rate of change ratio 100 Scale]
    *
    * Here are the equivalent function in other software:
    *       TA-Lib  |   Tradestation   |    Metastock         
    *       =================================================
    *       MOM     |   Momentum       |    ROC (Point)
    *       ROC     |   ROC            |    ROC (Percent)
    *       ROCP    |   PercentChange  |    -     
    *       ROCR    |   -              |    -
    *       ROCR100 |   -              |    MO
    *
    * The MOM function is the only one who is not normalized, and thus
    * should be avoided for comparing different time serie of prices.
    * 
    * ROC and ROCP are centered at zero and can have positive and negative
    * value. Here are some equivalence:
    *    ROC = ROCP/100 
    *        = ((price-prevPrice)/prevPrice)/100
    *        = ((price/prevPrice)-1)*100
    *
    * ROCR and ROCR100 are ratio respectively centered at 1 and 100 and are
    * always positive values.
    */

   /* Move up the start index if there is not
    * enough initial data.
    */
   if( startIdx < optInTimePeriod )
      startIdx = optInTimePeriod;

   /* Make sure there is still something to evaluate. */
   if( startIdx > endIdx )
   {
      VALUE_HANDLE_DEREF_TO_ZERO(outBegIdx);
      VALUE_HANDLE_DEREF_TO_ZERO(outNBElement);
      return ENUM_VALUE(RetCode,TA_SUCCESS,Success);
   }

   /* Calculate Rate of change Ratio: (price / prevPrice) */
   outIdx      = 0;
   inIdx       = startIdx;
   trailingIdx = startIdx - optInTimePeriod;

   while( inIdx <= endIdx )
   {
      tempReal = inReal[trailingIdx++];
      if( tempReal != 0.0 )
         outReal[outIdx++] = (inReal[inIdx] / tempReal)*100.0;
      else
         outReal[outIdx++] = 0.0; 
         
      inIdx++;
   }

   /* Set output limits. */
   VALUE_HANDLE_DEREF(outNBElement) = outIdx;
   VALUE_HANDLE_DEREF(outBegIdx)    = startIdx;

   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::RocR100( int    startIdx,
/* Generated */                                         int    endIdx,
/* Generated */                                         cli::array<float>^ inReal,
/* 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 rocR100( int    startIdx,
/* Generated */                         int    endIdx,
/* Generated */                         float        inReal[],
/* Generated */                         int           optInTimePeriod, /* From 1 to 100000 */
/* Generated */                         MInteger     outBegIdx,
/* Generated */                         MInteger     outNBElement,
/* Generated */                         double        outReal[] )
/* Generated */ #else
/* Generated */ TA_RetCode TA_S_ROCR100( int    startIdx,
/* Generated */                          int    endIdx,
/* Generated */                          const float  inReal[],
/* Generated */                          int           optInTimePeriod, /* From 1 to 100000 */
/* Generated */                          int          *outBegIdx,
/* Generated */                          int          *outNBElement,
/* Generated */                          double        outReal[] )
/* Generated */ #endif
/* Generated */ {
/* Generated */    int inIdx, outIdx, trailingIdx;
/* Generated */    double tempReal;
/* 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( !inReal ) return ENUM_VALUE(RetCode,TA_BAD_PARAM,BadParam);
/* Generated */     #endif 
/* Generated */     if( (int)optInTimePeriod == TA_INTEGER_DEFAULT )
/* Generated */        optInTimePeriod = 10;
/* 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( startIdx < optInTimePeriod )
/* Generated */       startIdx = optInTimePeriod;
/* 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 */    inIdx       = startIdx;
/* Generated */    trailingIdx = startIdx - optInTimePeriod;
/* Generated */    while( inIdx <= endIdx )
/* Generated */    {
/* Generated */       tempReal = inReal[trailingIdx++];
/* Generated */       if( tempReal != 0.0 )
/* Generated */          outReal[outIdx++] = (inReal[inIdx] / tempReal)*100.0;
/* Generated */       else
/* Generated */          outReal[outIdx++] = 0.0; 
/* Generated */       inIdx++;
/* Generated */    }
/* Generated */    VALUE_HANDLE_DEREF(outNBElement) = outIdx;
/* Generated */    VALUE_HANDLE_DEREF(outBegIdx)    = startIdx;
/* 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 ****/