F_StringIsASCII
The function checks whether a string contains only ASCII characters (0x000 to 0x7F) and returns the number of ASCII characters. The string is directly compatible to UTF-8 if it contains only ASCII characters.
The function stops the checking of the input length after Parameterlist.cMaxCharacters characters in order to avoid an infinite loop.
Return value
Name | Type | Description |
|---|---|---|
F_StringIsASCII | BOOL | The return value is TRUE if the string contains only ASCII characters. |
Inputs
VAR_INPUT
pSTRING : POINTER TO STRING;
END_VARName | Type | Description |
|---|---|---|
pString | POINTER TO STRING | Pointer to the STRING variable |
Outputs
VAR_OUTPUT
nLen : UDINT;
END_VARName | Type | Description |
|---|---|---|
nLen | UDINT | Number of ASCII characters in the string |
Requirements
Development environment | Target platform | PLC libraries to be integrated (category group) |
|---|---|---|
TwinCAT v3.1.4022 | PC or CX (x86, x64, Arm®) | Tc2_Utilities (System) >= 3.3.21.0 |