Ok, I think I understand now. Because the binary file is constant, you want to make symbols based on its contents. It's not possible, even though the values are known at compile time. -thefox Sent from my iPhone On 22.1.2013, at 9.44, Payton Byrd <plbyrd@gmail.com> wrote: Yes, this is very much what I'm looking for with one change. When I reference _ormand+font::IndexPtr, I want the actual value in fontIndex, not the memory location. I don't see how to do this. On Tue, Jan 22, 2013 at 1:21 AM, thefox xofeht <thefox@aspekt.fi> wrote: > On Tue, Jan 22, 2013 at 7:30 AM, Payton Byrd <plbyrd@gmail.com> wrote: > >> Hello, >> >> I have a scenario where I want to be able to define a font in a file and >> then overlay a struct on top of the loaded file such that I can access the >> values of the file as struct values. To that end I've created the >> following code, which compiles: >> >> .struct font >> Baseline .byte >> TotalWidth .word >> Height .byte >> IndexPtr .word >> FontDataPtr .word >> .endstruct >> >> .union Ormand >> Font .tag font >> >> >> >> >> >> .endunion >> >> fontRowLength = _ormand+font::TotalWidth >> fontIndex = _ormand + _ormand+font::IndexPtr >> fontData = _ormand + _ormand+font::FontDataPtr >> >> .rodata >> _ormand: .tag Ormand >> .incbin "..\res\ormand.geosfont" >> >> >> The problem I'm having is that the values I retrieve from the >> fontRowLength, fontIndex, and fontData variables do not reflect the data in >> the file. What am I doing wrong here? I've searched google (including the >> mailing list) and found no answer. >> > > Hi, > > I'm guessing you want something like this: > > .struct font > Baseline .byte > TotalWidth .word > Height .byte > IndexPtr .word > FontDataPtr .word > .endstruct > > fontRowLength = _ormand+font::TotalWidth > fontIndex = _ormand+font::IndexPtr > fontData = _ormand+font::FontDataPtr > > .rodata > _ormand: > .incbin "..\res\ormand.geosfont" > > No need for union. And note that .tag actually allocates memory, so if you > put .tag in rodata, it will allocate bunch of zeroes from it according to > the data structure given to it. > > -thefox > > -- Payton Byrd <http://www.paytonbyrd.com> <http://it.toolbox.com/blogs/paytonbyrd> ---------------------------------------------------------------------- To unsubscribe from the list send mail to majordomo@musoftware.de with the string "unsubscribe cc65" in the body(!) of the mail.Received on Tue Jan 22 09:20:09 2013
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