User:FIQ/Restoring DynaHack saves - Revision history

FIQ at 23:53, 28 August 2020

2020-08-28T23:53:56Z

FIQ: document how to interpret save desync errors

2020-08-28T23:49:50Z

document how to interpret save desync errors

FIQ: add save desync cause notes for future reference

2020-08-28T23:38:54Z

add save desync cause notes for future reference

FIQ: explain why the methods (generally) work

2019-10-29T16:17:27Z

explain why the methods (generally) work

FIQ: restoring dyna saves

2019-10-29T16:08:55Z

restoring dyna saves

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Personal notes for how to restore DynaHack saves. I do not take any responsibility for what you do with this!

<pre>
* There might be binary save data at the bottom. Get rid of it
- Search for "abcdefghijkl" to easily jump to the beginning of it
- The last line should be a diff (~ f:(...))
- Don't omit the newline at the end!
* Sample first line: NHGAME inpr 00e2e4a1 00008811 0.6.0
- Make sure it says "inpr" before loading it
- The game can mess up and make the file worse by failing to load it, so back it up each time before load!
- The first hexadecimal number is the file size. Adjust it after removing the binary stuff
- The second one denotes turncount. You don't need to care about this (Replay mode uses it)
* Back up the save after adjusting it as per above and attempt to load it
- If you get something akin to "Error at position 38062" (somewhat low number), try this:
- Figure out the largest line in the save file
- Try this: perl -ne 'print length()." line $. $_"' ~/.config/DynaHack/save/THESAVE.nhgame | sort -nr | head -n 1
- Output: (size of line) line (line) (content)
- Go to file position as per given above (38062 in this example)
- Emacs: goto-char
- Remove data starting from the diff. If the line is not a diff, remove starting from last diff above
- Remove up until the diff given by (line) above
- Remember to fix file size data at the top
- If the load fails, find the 2nd largest line. How to? Go figure out by yourself
- If you're still failing, try the method below
- If you get errors about the end:
- Remove the last diff in the file and everything above it until the 2nd last diff
- Remember to fix file size data at the top
- If the load fails, try to remove the 2nd last diff, etc...
- If you're still failing, try the method above
</pre>

@@ Line 36: / Line 36: @@
 == Things that cause a DynaHack save to lose sync ==
 * Saving and restoring a game (always)
 * Recovering from blindness (MTAG_OBJ, byte 39 [obj->ox]). Verification: See game log from Aug 28, 2020 23:30ish UTC. FIQ wiz-vam-mal-cha killed by an invisible gnome lord after 1934 moves (desync on replay action 470/609). No save+restore was made before this action.

@@ Line 36: / Line 36: @@
 == Things that cause a DynaHack save to lose sync ==
 * Saving and restoring a game (always)
 * Recovering from blindness (MTAG_OBJ, byte 39 [obj->ox]). Verification: See game log from Aug 28, 2020 23:30ish UTC. FIQ wiz-vam-mal-cha killed by an invisible gnome lord after 1934 moves (desync on replay action 470/609). No save+restore was made before this action.

← Older revision		Revision as of 23:38, 28 August 2020
Line 34:		Line 34:
	- If you're still failing, try the method above		- If you're still failing, try the method above
	</pre>		</pre>
		+
		+	== Things that cause a DynaHack save to lose sync ==
		+	* Saving and restoring a game (always)
		+	* Recovering from blindness (MTAG_OBJ, byte 39 [obj->ox]). Verification: See game log from Aug 28, 2020 23:30ish UTC. FIQ wiz-vam-mal-cha killed by an invisible gnome lord after 1934 moves (desync on replay action 470/609). No save+restore was made before this action.

@@ Line 21: / Line 21: @@
      - Remove up until the diff given by (line) above
      - Remember to fix file size data at the top
      - If the load fails, find the 2nd largest line. How to? Go figure out by yourself
      - If you're still failing, try the method below
@@ Line 26: / Line 30: @@
      - Remove the last diff in the file and everything above it until the 2nd last diff
      - Remember to fix file size data at the top
      - If the load fails, try to remove the 2nd last diff, etc...
      - If you're still failing, try the method above
 </pre>