Core Function PTRWrite
From Sputnik Wiki
PTRWrite( <ptr>, <type>, <offset>, <value> )
Contents |
Description
Write data to a memory pointer optionally starting from a given index.
Parameters
ptr
The pointer to use.
type
The type of data to read
[TYPE] [WHAT IT IS] r Raw bytes c ASCII char C UNICODE char b unsigned byte B signed byte s signed int16 i signed int32 l signed int64 S unsigned int16 I unsigned int32 L unsigned int64 f float d double t pointer
offset
Offset to add to the pointer.
value
The value to write to the pointer at the given offset.
Return Value
Success: Returns 1.
Failure: Returns 0.
Remarks
None.
Example
$PTR = Alloc(300); PTRWrite($PTR, "f", 0, 133.77); PTRWrite($PTR, "l", 4, 777); PTRWrite($PTR, "i", 12, 1221); Println( PTRRead($PTR, "f", 0) ); Println( PTRRead($PTR, "l", 4) ); Println( PTRRead($PTR, "i", 12) ); Free($PTR);
This uses a string
$PTR = Alloc(300); PTRWrite($PTR, "f", 0, 133.77); PTRWrite($PTR, "l", 4, 777); PTRWrite($PTR, "i", 8, StringToPTR(0, "Hello World")); PTRWrite($PTR, "i", 12, 1221); Println( PTRRead($PTR, "f", 0) ); Println( PTRRead($PTR, "l", 4) ); Println( PTRToString(0, PTRRead($PTR, "i", 8)) ); Println( PTRRead($PTR, "i", 12) ); Free($PTR);
Example of writing raw bytes to the pointer
$Value = "Hello World!"; $PTR = Alloc(StrLen($Value) + 1); $Bytes = Pack("A*", "Hello World!"); PTRWrite($PTR, "r", 0, $Bytes); $String = PTRToString(0, $PTR); echo $String; Free($PTR); # Prints # Hello World!
