Re: memcpy with 64 bit
Re: memcpy with 64 bit
- Subject: Re: memcpy with 64 bit
- From: "Hank Heijink (Mailinglists)" <email@hidden>
- Date: Mon, 14 Dec 2009 13:42:13 -0500
On Dec 14, 2009, at 1:27 PM, gMail.com wrote:
> Hi,
> if I compile this code against "32-bits Universal", it works.
> If I compile this code against "64-bit Intel", it doesn't work.
> I get a bad access error just on memcpy. What do I miss? I use:
>
> Base SDK 10.6
> i386 ppc ppc64 ppc7400 ppc970 x86_64
> GCC 4.2 or 4.0
> Target Mac OS X 10.6
> Active Architecture x86_64
>
> - (void)LoadImageData:(NSData*)imageData
> pointer:(void*)handle
> h:(GLuint)imageHeight
> {
> NSBitmapImageRep *bitmap = [[NSBitmapImageRep alloc]
> initWithData:imageData];
> int bytesPRow = [bitmap bytesPerRow];
> unsigned char *theImageData = [bitmap bitmapData];
> int rowNum;
>
> for(rowNum = 0; rowNum < imageHeight; rowNum++){
> memcpy(handle + (rowNum * bytesPRow),
> theImageData + (rowNum * bytesPRow), bytesPRow);
> }
>
> [bitmap release];
> }
How did you allocate handle? Any chance you're allocating enough memory for 32-bit values, but not for 64-bit ones?
Hank
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