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Re: memcpy with 64 bit
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Re: memcpy with 64 bit


  • Subject: Re: memcpy with 64 bit
  • From: Mike Abdullah <email@hidden>
  • Date: Mon, 14 Dec 2009 18:41:58 +0000

Have you read the 64 bit transition guide? http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptual/Cocoa64BitGuide/Introduction/Introduction.html
Your question (use of int) suggests not.

On 14 Dec 2009, at 18:27, 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];
> }
>
>
> Best Regards
> --
> Leonardo
>
>
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