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Garo, posted Fri Apr 16, 2021 11:09 am (63398)

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I made an archive called GGTX or gtx.

This is the BMS script to decompress it

Code:

comtype lzma2

idstring "GGTX"
get ZSIZE long
get SIZE long
get NAME basename
string NAME   ".amg"
savepos OFFSET
clog NAME OFFSET ZSIZE SIZE

But I made an archive called PTK or UKTP162N, that uses this script

Code:

idstring "UKTP162N"
get FILES long
get NAMESZ long

for i = 0 < FILES
   getdstring NAME NAMESZ
   get OFFSET longlong
   get SIZE longlong
   log NAME OFFSET SIZE

For each subarchive in the archive, I want to specify the idstring "GGTX" and decompress the file with lzma2.

aluigi, posted Fri Apr 16, 2021 9:42 pm (63407)

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You can try something like the following:

Code:

idstring "UKTP162N"
get FILES long
get NAMESZ long

for i = 0 < FILES
   getdstring NAME NAMESZ
   get OFFSET longlong
   get SIZE longlong

    savepos TMP
    goto OFFSET
    getdstring SIGN 4
    if SIGN u== "GGTX"
        callfunction ggtx_unpack 1
    else
        log NAME OFFSET SIZE
    endif
    goto TMP
next i

startfunction ggtx_unpack
    comtype lzma2
    #idstring "GGTX"
    get ZSIZE long
    get SIZE long
    savepos OFFSET
    clog NAME OFFSET ZSIZE SIZE
endfunction