STW TC1, User Manual

Page: 127 / 374

7 Teleservice Application Framework
User Manual 127/374
STW
type Prefix Size Range (hexadecimal - HEX) Range (decimal - DEC) C equivalent
places 15..16) double precision
NATIVE type definitions
STW
type Prefix Size Range (hexadecimal - HEX) Range (decimal - DEC) C equivalent
charn
cn_ 8 bit 0x80 .. 0x7F -128 .. +127 char
uintn
un_ 32
bit 0x00000000 .. 0xFFFFFFFF 0 .. 4294967295 unsigned int
sintn
sn_ 32
bit 0x80000000 .. 0x7FFFFFFF - 2147483648 ..
+2147483647 signed int
Not recommended mistakable COMPATIBILITY type definitions
STW
type Prefix Size Range (hexadecimal - HEX) Range (decimal - DEC) C equivalent
boolean
q_ 8 bit 0x00:FALSE / (!=0x00):TRUE 0:FALSE / (!=0):TRUE unsigned char
STW also defines the data type boolean to store binary data. A boolean data type can help to increase the
performance. However boolean is target specific and should be used with care. On some platforms a boolean
variable takes 1 bit of memory. Such a variable can only be 0 or 1 but can not be referenced by pointers or
members of a structure. Other platforms define boolean as an integer variable. In this case it is not guaranteed,
that the value of this variable is 0 or 1 - it could also be greater than 1. If a platform defines a boolean as an
integer, the variable can be referenced by pointers or member of a structure.
NOTE:
For information about using floating point arithmetic see programming hints.
NOTE:
The width of native data types (charn, uintn, and sintn) depend on the used platforms.
On 16-bit platforms an integer has a width of 16-bits - at 32-bit platform it is 32-bit wide. The API uses
this behavior for definition of platform comprehensive functions.
WARNING:
Note:
The usage of boolean can lead to unportable code.