int get_first_month(int year, int month)
{
const int weeknum[7] = {1,2,3,4,5,6,0}; //数组的作用是对应不同余数的星期
int weeksum = yeardays(year) + monthdays(year,month) + 1; //计算这个月第一天到基准日的天数
int week = weeksum % 7; //计算这些天的星期余数
return weeknum[week];
}
int weekday(int year, int month, int day) //计算当前日期到基准日的星期
{
const int weeknum[7] = {1,2,3,4,5,6,0};
int weeksum = yeardays(year) + monthdays(year,month)+ day;
int week = weeksum % 7;
return weeknum[week];
}
BOOL EVAL::EvalFunction(INT nFunction, INT argc, double * argv, double * pValue)
{
switch( nFunction ) {
case EVAL_FUNCTION_ABS:
if( argc == 1 ) { * pValue = fabs( argv[0] ); return TRUE; }
break;
case EVAL_FUNCTION_MOD:
if( argc == 2 ) { * pValue = fmod( argv[0], argv[1] ); return TRUE; }
break;
case EVAL_FUNCTION_CEIL:
if( argc == 1 ) { * pValue = ceil( argv[0] ); return TRUE; }
break;
case EVAL_FUNCTION_FLOOR:
if( argc == 1 ) { * pValue = floor( argv[0] ); return TRUE; }
break;
case EVAL_FUNCTION_ROUND:
if( argc == 1 ) { * pValue = floor( argv[0] + 0.5 ); return TRUE; }
break;
case EVAL_FUNCTION_MIN:
if( argc == 2 ) { * pValue = argv[0] < argv[1] ? argv[0] : argv[1]; return TRUE; }
break;
case EVAL_FUNCTION_MAX:
if( argc == 2 ) { * pValue = argv[0] > argv[1] ? argv[0] : argv[1]; return TRUE; }
break;
case EVAL_FUNCTION_ACOS:
if( argc == 1 ) { * pValue = acos(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_ASIN:
if( argc == 1 ) { * pValue = asin(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_ATAN:
if( argc == 1 ) { * pValue = atan(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_ATAN2:
if( argc == 2 ) { * pValue = atan2(argv[0], argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_COS:
if( argc == 1 ) { * pValue = cos(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_SIN:
if( argc == 1 ) { * pValue = sin(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_TAN:
if( argc == 1 ) { * pValue = tan(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_COSH:
if( argc == 1 ) { * pValue = cosh(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_SINH:
if( argc == 1 ) { * pValue = sinh(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_TANH:
if( argc == 1 ) { * pValue = tanh(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_EXP:
if( argc == 1 ) { * pValue = exp(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_LOG:
if( argc == 1 ) { * pValue = log(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_LOG10:
if( argc == 1 ) { * pValue = log10(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_POW:
if( argc == 2 ) { * pValue = pow(argv[0], argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_SQR:
if( argc == 1 ) { * pValue = argv[0] * argv[0]; return TRUE; }
break;
case EVAL_FUNCTION_SQRT:
if( argc == 1 ) { * pValue = sqrt(argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_TODAY:
if( argc == 0 ) { * pValue = (double)today(); return TRUE; }
break;
case EVAL_FUNCTION_YEARDAYS:
if( argc == 1 ) { * pValue = (double)yeardays((int)argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_MONTHDAYS:
if( argc == 2 ) { * pValue = (double)monthdays((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_DATE2DAYS:
if( argc == 1 ) { * pValue = (double)date2days((int)argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_DAYS2DATE:
if( argc == 1 ) { * pValue = (double)days2date((int)argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_EOMDAY:
if( argc == 2 ) { * pValue = (double)eomday((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_EOMDATE:
if( argc == 2 ) { * pValue = (double)eomdate((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_WEEKDAY:
if( argc == 1 ) { * pValue = (double)weekday((int)argv[0]); return TRUE; }
break;
case EVAL_FUNCTION_ISBIZDATE:
if( argc == 1 ) { * pValue = (double)isbizdate((int)argv[0], HDC_SUNSAT ); return TRUE; }
if( argc == 2 ) { * pValue = (double)isbizdate((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_NBIZDATE:
if( argc == 1 ) { * pValue = (double)nbizdate((int)argv[0], HDC_SUNSAT ); return TRUE; }
if( argc == 2 ) { * pValue = (double)nbizdate((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_PBIZDATE:
if( argc == 1 ) { * pValue = (double)pbizdate((int)argv[0], HDC_SUNSAT ); return TRUE; }
if( argc == 2 ) { * pValue = (double)pbizdate((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_ADDDAYS:
if( argc == 2 ) { * pValue = (double)adddays((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_ADDMONTHS:
if( argc == 2 ) { * pValue = (double)addmonths((int)argv[0], (int)argv[1], EMR_ACTUAL ); return TRUE; }
if( argc == 3 ) { * pValue = (double)addmonths((int)argv[0], (int)argv[1], (int)argv[2]); return TRUE; }
break;
case EVAL_FUNCTION_ADDTERMS:
if( argc == 3 ) { * pValue = (double)addterms((int)argv[0], (int)argv[1], (int)argv[2], EMR_ACTUAL ); return TRUE; }
if( argc == 4 ) { * pValue = (double)addterms((int)argv[0], (int)argv[1], (int)argv[2], (int)argv[3]); return TRUE; }
break;
case EVAL_FUNCTION_DAYS360:
if( argc == 2 ) { * pValue = (double)days360((int)argv[0], (int)argv[1], 0 /* USA */ ); return TRUE; }
if( argc == 3 ) { * pValue = (double)days360((int)argv[0], (int)argv[1], (int)argv[2]); return TRUE; }
break;
case EVAL_FUNCTION_DAYS365:
if( argc == 2 ) { * pValue = (double)days365((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_DAYSACT:
if( argc == 2 ) { * pValue = (double)daysact((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_DAYSBET:
if( argc == 2 ) { * pValue = (double)daysbet((int)argv[0], (int)argv[1], DCB_ACTACT ); return TRUE; }
if( argc == 3 ) { * pValue = (double)daysbet((int)argv[0], (int)argv[1], (int)argv[2]); return TRUE; }
break;
case EVAL_FUNCTION_MONTHSBET:
if( argc == 2 ) { * pValue = (double)monthsbet((int)argv[0], (int)argv[1]); return TRUE; }
break;
case EVAL_FUNCTION_TERMSBET:
if( argc == 3 ) { * pValue = (double)termsbet((int)argv[0], (int)argv[1], (int)argv[2]); return TRUE; }
break;
case EVAL_FUNCTION_TERMFRAC:
if( argc == 3 ) { * pValue = termfrac((int)argv[0], (int)argv[1], (int)argv[2], DCB_ACTACT, EMR_ACTUAL ); return TRUE; }
if( argc == 4 ) { * pValue = termfrac((int)argv[0], (int)argv[1], (int)argv[2], (int)argv[3], EMR_ACTUAL ); return TRUE; }
if( argc == 5 ) { * pValue = termfrac((int)argv[0], (int)argv[1], (int)argv[2], (int)argv[3], (int)argv[4]); return TRUE; }
break;
case EVAL_FUNCTION_YEARFRAC:
if( argc == 2 ) { * pValue = yearfrac((int)argv[0], (int)argv[1], DCB_ACTACT, EMR_ACTUAL ); return TRUE; }
if( argc == 3 ) { * pValue = yearfrac((int)argv[0], (int)argv[1], (int)argv[2], EMR_ACTUAL ); return TRUE; }
if( argc == 4 ) { * pValue = yearfrac((int)argv[0], (int)argv[1], (int)argv[2], (int)argv[3]); return TRUE; }
break;
}
return FALSE;
}
