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	==Definition==		==Definition==
-	'''INT''' memset ( <'''BYTE POINTER''' data> , <'''BYTE''' value> , <'''INT''' bytes> )	+	'''INT''' memset ( <'''VOID POINTER''' data> , <'''BYTE''' value> , <'''INT''' bytes> )
	Sets all bytes in a certain memory block to a certain value.		Sets all bytes in a certain memory block to a certain value.
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	== Parameters ==		== Parameters ==
	{|		{|
-	| '''BYTE POINTER''' data || - Pointer to the block of bytes in memory	+	| '''VOID POINTER''' data || - Pointer to the block of bytes in memory
	|-		|-
	| '''BYTE''' value || - Value to set all bytes to.		| '''BYTE''' value || - Value to set all bytes to.
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	</pre>		</pre>
	Used in example: [[alloc]](), [[memsetw]](), [[say]](), [[pointer]]		Used in example: [[alloc]](), [[memsetw]](), [[say]](), [[pointer]]
-	Also usable in conjunction with [[map_buffer]]() with 8bit maps. (''Example needed.'')	+
		+	Also usable in conjunction with [[map_buffer]]() with 8bit [[map]]s. (''Example needed.'')

---

Revision as of 00:30, 28 April 2007

Contents 1 Definition 2 Parameters 3 Returns 4 Example

Definition

INT memset ( <VOID POINTER data> , <BYTE value> , <INT bytes> )

Sets all bytes in a certain memory block to a certain value.

Parameters

VOID POINTER data	- Pointer to the block of bytes in memory
BYTE value	- Value to set all bytes to.
INT bytes	- Number of bytes to change the value of.

Returns

INT : true

Example

Program example;
Private
    byte pointer pbyte;
    word pointer pword;
    int  pointer pint;
    int elements = 10;
    int i;
Begin

    // Allocate memory
    pbyte = alloc(elements);
    pword = alloc(elements*sizeof(word));
    pint  = alloc(elements*sizeof(int));

    // Reset memory to 0's
    memset (pbyte,0,elements);
    memsetw(pword,0,elements); // same as  memset(pword,0,elements*sizeof(word));
                               // because value-parameter is 0.
    memset (pint ,0,elements*sizeof(int)); // There isn't a "memseti()", so we need to
                                           // set the individual bytes to 0. To change
                                           // ints to nonzero values, memset() can't be
                                           // used easily

    // Write numbers to bytes and ints
    for(i=0; i<elements; i++)
        pbyte[i]  = 133; // pbyte[i] is the same as *(pbyte+i)
        *(pint+i) = 4555; // pint[i] is the same as *(pint+i)
    end

    // Write numbers to words
    memsetw(pword,345,elements);

    // Show numbers
    for(i=0; i<elements; i++)
        say("byte["+i+"] = " + *(pbyte+i));
        say("word["+i+"] = " + pword[i]);
        say("int ["+i+"] = " + pint[i]);
    end

    Loop
        frame;
    End

End

Used in example: alloc(), memsetw(), say(), pointer

Also usable in conjunction with map_buffer() with 8bit maps. (Example needed.)