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Forums > C64 Coding > Reading the directory - raw mode

2018-10-08 19:20

JackAsser

Registered: Jun 2002
Posts: 1987

Reading the directory - raw mode

I might have dreamt it but.. I distinctively remember being able to control ”output mode” from the regular reading $ command. I’d rather not parse quoted strings and what not and I’d rather not read raw sectors.

I remeber being able to change output format..

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2018-10-08 23:07

Krill

Registered: Apr 2002
Posts: 2825

Then you should have perfect control over your naming scheme.

I think parsing the directory in cooked mode is the better option. Works consistently across all drives, and you're using KERNAL calls anyways.

And it can't be so hard or error-prone to do some kind of pattern matching in order to list your savegames, can it? Doesn't even require handling quoted strings and what not. :)

2018-10-08 23:35

JackAsser

Registered: Jun 2002
Posts: 1987

Quote: Then you should have perfect control over your naming scheme.

I think parsing the directory in cooked mode is the better option. Works consistently across all drives, and you're using KERNAL calls anyways.

And it can't be so hard or error-prone to do some kind of pattern matching in order to list your savegames, can it? Doesn't even require handling quoted strings and what not. :)

Just did. :)

1) Enter kernel hell

2 I read each null-terminated line into a buffer.

3) Scan from the end until normal character, then scans backwards until space. => File type found

4) Then I continue to scan backwards until " found. If not, bail

5) Then I scan from 0 and forward until " found. If not bail

=> Filename found

6) Verify filetype, pattern match filename, add to valid file buffer list.

7) Repeat 2) until EOF

8) Leave kernel hell

9) Present nice file picker UI

2018-10-08 23:39

chatGPZ

Registered: Dec 2001
Posts: 11100

why dont you just let the drive do the work for you?

a) pick a prefix for your savegames, like "leet.game1" "leet.game2"
b) open "$:leet*"

2018-10-09 00:03

JackAsser

Registered: Jun 2002
Posts: 1987

Quote: why dont you just let the drive do the work for you?

a) pick a prefix for your savegames, like "leet.game1" "leet.game2"
b) open "$:leet*"

Wasnt aware it could be done. Awesome! I’ll remove my filter stuff but keep the quote parsing. Can you enforce filetype also?

2018-10-09 00:09

chatGPZ

Registered: Dec 2001
Posts: 11100

of course - open "$:bla*,p"

2018-10-09 00:14

Krill

Registered: Apr 2002
Posts: 2825