Reserved Identifiers
112
NetLinx Programming Language Reference Guide
Keywords & Run-Time Library Functions (Cont.)
DATE The system variable DATE returns the current date in (mm/dd/yy) string format.
The wildcard character "?" is not allowed for string comparisons because the
actual date is needed.
IF (DATE = '12/25/00')
{
}
You can replace the wildcard feature by using the COMPARE_STRING function.
DAY The system variable DAY returns the current day of the week as one of the fol-
lowing strings: 'MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT' or 'SUN'.
IF (DAY = 'SUN')
{
}
DATE_TO_DAY This function returns an sinteger representing the day portion of a date string.
The S in SINTEGER allows a negative value to be returned.
SINTEGER DATE_TO_DAY (CHAR LDATE[ ])
Parameters:
• LDATE: [Input] string containing the date in mm/dd/yyyy format.
If successful, this function returns an integer (1-31) representing the day portion
of the date string. If the specified date is invalid, this function returns -1.
SINTEGER nDaynDay = DATE_TO_DAY ('2/9/1999') // nDay = 9
DATE_TO_MONTH This function returns an sinteger representing the month portion of a date string.
SINTEGER DATE_TO_MONTH (CHAR LDATE[ ])
Parameters:
• LDATE: [Input] string containing the date in mm/dd/yyyy format.
If successful, this function returns an integer (1-12) representing the month por-
tion of the date string. If the specified date is invalid, this function returns -1.
SINTEGER nMonthNMonth = DATE_TO_MONTH ('2/9/1999')
// nMonth = 2
DATE_TO_YEAR This function returns an sinteger representing the year portion of a date string.
SINTEGER DATE_TO_YEAR (CHAR LDATE[ ])
Parameters:
• LDATE: [Input] string containing the date in mm/dd/yyyy format.
If successful, this function returns a 4-digit integer representing the year portion
of the date string. If the specified date is invalid, this function returns -1.
SINTEGER nYearnYear = DATE_TO_YEAR ('2/9/1999')
// nYear = 1999
DAY_OF_WEEK This function returns the day of the week for the specified date.
SINTEGER DAY_OF_WEEK (CHAR LDATE[ ])
Parameters:
• LDATE: String containing the date in mm/dd/yyyy format.
This function returns an sinteger representing the day of the week (1 = Sunday,
2 = Monday, etc.).
SINTEGER nDay = DAY_OF_WEEK ('2/13/1999')
// nDay = 7 (Saturday)
DEFAULT This keyword specifies the default case in a SWITCH…CASE statement.
See SWITCH...CASE on page 153.
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