Language Elements
50
NetLinx Programming Language Reference Guide
Data Types
Intrinsic types
The following table lists the data types inherently supported by the NetLinx language.
Type conversion
Although explicit type casting is not supported in the NetLinx language, the compiler is forced to do type
conversion in situations where an arithmetic assignment or other operation is defined with constants and/
or variables having mixed data types. Type conversions will occur under the following circumstances:
A value of one type is assigned to a variable of another type.
A value passed as a parameter to a subroutine does not match the declared parameter type.
The value returned by a subroutine does not match the declared return type.
Type conversion rules
If the expression contains a 32 or 64-bit floating-point variable or constant, all variables and
constants in the expression are converted to 64-bit floating point before resolving.
If the expression contains only whole number value variables and constants, all variables and
constants in the expression are converted to 32-bit integers before resolving.
If type conversion is required for an assignment or as a result of a parameter or return type
mismatch, the value is converted to fit the type of the target variable. This may involve
truncating the high order bytes(s) when converting to a smaller size variable, or sign
conversion when converting signed values to unsigned or vice versa.
NetLinx Intrinsic Data Types
Keyword
Data Type
Sign
Size
Range
CHAR
Byte
Unsigned
8-bit
0 - 255
WIDECHAR
Integer
Unsigned
16-bit
0 - 65535
INTEGER
Integer
Unsigned
16-bit
0 - 65536
SINTEGER
Integer
Signed
16-bit
-32768 to +32768
LONG
Long Integer
Unsigned
32-bit
4,294,967,295
SLONG
Long Integer
Signed
32-bit
+ 2,147,483,647
FLOAT
Floating Point
Signed
32-bit
1.79769313 E
+308
to 2.22507385 E
-308
DOUBLE
Double Precision
Floating Point
Signed
32-bit
3.40282347 E
+38
to 1.17549435 E
-38
Содержание NETLINX PROGRAMMING LANGUAGE
Страница 15: ...Table of Contents xiii NetLinx Programming Language Reference Guide...
Страница 16: ...xiv NetLinx Programming Language Reference Guide Table of Contents...
Страница 18: ...Introduction 2 NetLinx Programming Language Reference Guide...
Страница 76: ...Language Elements 60 NetLinx Programming Language Reference Guide...
Страница 106: ...Combining Devices Levels and Channels 90 NetLinx Programming Language Reference Guide...
Страница 112: ...Master To Master M2M 96 NetLinx Programming Language Reference Guide...
Страница 114: ...Mainline 98 NetLinx Programming Language Reference Guide FIG 1 Message and Mainline Processing in the NetLinx System...
Страница 182: ...Reserved Identifiers 166 NetLinx Programming Language Reference Guide...
Страница 204: ...NetLinx UniCode Functions 188 NetLinx Programming Language Reference Guide...
Страница 244: ...Appendix B Glossary 228 NetLinx Programming Language Reference Guide...
Страница 245: ...Appendix B Glossary 229 NetLinx Programming Language Reference Guide...