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zgoro, posted Tue May 11, 2021 8:18 am (63883)

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Hi pals,

I'm trying to understand how to use Append 1 (overwrite mode):

Code:

open fdsE target.bin 99   #Target file

get SIZE asize # Get size of new chunk to import

append 1
goto 0x0c7518 99  # Offset to insert new chunk into Target file
log target.bin 0x0c7518 SIZE
append

This does not work as it expects a smaller file, which is the correct way to do it?

Cheers!

aluigi, posted Tue May 11, 2021 9:51 am (63884)

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Reading and writing the same file at the same time?
I'm not surprised it doesn't work.

zgoro, posted Tue May 11, 2021 10:17 am (63885)

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Well yeah, it definitely is wrong!
How should I change the script for this to work?

Thanks for you stellar job on QBMS, I love it!

aluigi, posted Tue May 11, 2021 10:35 am (63887)

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The best solution is just creating a new file with the portions of the original file you want that I guess it's the following:

Code:

get SIZE asize
log "new.bin" 0 0x0c7518
append
log "new.bin" 0 SIZE
append

zgoro, posted Tue May 11, 2021 10:38 am (63888)

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Gotcha, thanks Aluigi!

zgoro, posted Wed May 12, 2021 8:52 am (63914)

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Just for ref, after abit of experiments overwrite Append 1 worked great on my side like this:

Code:

Open FDSE "Source.bin" 9                   # Open source file you want to overwrite data in, refer as "9"
Get S_SIZE asize 9                         # Get source file total size as S_SIZE
Get I_SIZE asize                           # Get input file total size as I_SIZE  
Log MEMORY_FILE 0 S_SIZE 9                 # Place the whole source file in MEMORY_FILE 
                                           
                                                                                    
Goto 0x20 MEMORY_FILE                      # Which offset to store input file
Append 1                                    
Log MEMORY_FILE 0 I_SIZE                   # Input file starting offset & size   
Append                                     
                                             
                                                                        
Log NEW.bin 0 S_SIZE MEMORY_FILE           # Log to new file

Of course, by repeating the "Goto -Append 1 - Log - Append" chunk, you can overwrite to multiple offsets at once.