Little-Endian to Big-Endian Convertor?

[Lazy Bastard]

I'd like something (online script, program, etc) that will allow me to dump a list of little-endian memory addresses (say, 32-bit/4-byte) somewhere, and have a list of big-endian addresses come out the other side. I'd rather not have to compile whatever this is, if possible (I see there are a few C source code files floating around for such a thing). I don't mind using something like CScript, Windows batch script, VBScript, etc, but I'm too lazy to set up a dev environment on my machine at the moment, especially to be disappointed when whatever I've found won't compile for some reason or another.

Anyone know of something that will work?

[dnawrkshp]

This is something I wrote in VB6. It is slow, and I think something in C/C++ would be more practical, but it does work.

It exports as a string like this: DATA (32 bits) and then a newline and the next 32 bits. Alternatively, if you have the interest of making a code out of this, you may check the 'Address' box and specify an initial address. Then it will output like this (in hex);

ADDRESS DATA
ADDRESS + 4 DATA

and so on. Also, you can specify a range with the Load Offset and Load End Offset. It counts in bytes and will round to the lowest multiple of 4 (VALUE - (VALUE % 4)). If the Load End Offset is 0, it will use the file length of the file specified.

Hope this helps.

[Pyriel]

addresses.txt

20101002
24101002
28101002
2C101002
30101002
341010
3810
3C

endianswap.bat

@ECHO OFF
SETLOCAL EnableDelayedExpansion
FOR /F "tokens=*" %%G IN (addresses.txt) DO (
  SET ADDRESS=%%G
  ECHO !ADDRESS:~6,2!!ADDRESS:~4,2!!ADDRESS:~2,2!!ADDRESS:~0,2!
)
ENDLOCAL

Sample Output

02101020
02101024
02101028
0210102C
02101030
101034
1038
3C

[Lazy Bastard]

This is something I wrote in VB6. It is slow, and I think something in C/C++ would be more practical, but it does work.

It exports as a string like this: DATA (32 bits) and then a newline and the next 32 bits. Alternatively, if you have the interest of making a code out of this, you may check the 'Address' box and specify an initial address. Then it will output like this (in hex);

ADDRESS DATA
ADDRESS + 4 DATA

and so on. Also, you can specify a range with the Load Offset and Load End Offset. It counts in bytes and will round to the lowest multiple of 4 (VALUE - (VALUE % 4)). If the Load End Offset is 0, it will use the file length of the file specified.

Hope this helps.

Looks great, but I can't seem to make it work properly. I feed it a text file with lines like this:

00430D80
00F20C80
04300D80
04480C80
04C40C80

...and give it an output file to save to, but when I hit Convert, it says "Address not valid!". Any idea?

addresses.txt

20101002
24101002
28101002
2C101002
30101002
341010
3810
3C

endianswap.bat

@ECHO OFF
SETLOCAL EnableDelayedExpansion
FOR /F "tokens=*" %%G IN (addresses.txt) DO (
  SET ADDRESS=%%G
  ECHO !ADDRESS:~6,2!!ADDRESS:~4,2!!ADDRESS:~2,2!!ADDRESS:~0,2!
)
ENDLOCAL

Sample Output

02101020
02101024
02101028
0210102C
02101030
101034
1038
3C

Perfect; does exactly what I need it to. Thanks I just added a >> addressesbig.txt to the end of the echo command to output to a new file.

When grabbing chunks of offsets from a file in a hex editor (HxD, usually), I end up with a blob of one byte, space, another byte, space, etc. I usually like my data in this format, but in the case of offsets, it's obviously a hassle. So, I'm currently doing the following for each chunk of offsets:

Switch to byte group size 4 (so 32 bits before each space)
Copy, paste to something like sortmylist.com
Switch back to byte group size 1 (for whatever I'm doing with the next chunk of data)
In sortmylist.com, create columns delimited by space (yeah, I could do this in Excel, but it's quicker this way)
Run the list through the batch script you provided above.

Although, it would be optimal to simply toss the entire single-byte-separated blob at something, and have the finished product spit out the other end. Ideas?

[Pyriel]

20 10 10 02
24 10 10 02
28 10 10 02
2C 10 10 02
30 10 10 02
34 10 10
38 10
3C

@ECHO OFF
SETLOCAL EnableDelayedExpansion
FOR /F "tokens=1-4" %%A IN (addresses.txt) DO (
  ECHO %%D%%C%%B%%A
)
ENDLOCAL

Kind of depends on how many you have per line. You can do up to say 61 pairs per line, technically, but Windows batch scripting is kind of cruddy, so you can't really do an arbitrary number per line.

Edit: Also, >> will append if the file exists. Obviously, that's necessary in the echo, unless you only want one address in the file, but you need to clear out that file somehow on each run. Unless you want a running list from all executions, that is. Generally, I'd just call the batch file and redirect its output on the command line.

Edit 2: I should clarify. You can do 61 or fewer bytes per line, with the possibility of gobbledy-gook for the last set of tokens, as long as you have the %%D%%C%%B%%A, %%H%%G%%F%%E, etc. for them. You just can't have 5 bytes on a line, and then 3 bytes on the next, and have that pair up.

[rimsky82]

Or http://regexr.com?33ru0

Alter to your liking.

[Lazy Bastard]

20 10 10 02
24 10 10 02
28 10 10 02
2C 10 10 02
30 10 10 02
34 10 10
38 10
3C

@ECHO OFF
SETLOCAL EnableDelayedExpansion
FOR /F "tokens=1-4" %%A IN (addresses.txt) DO (
  ECHO %%D%%C%%B%%A
)
ENDLOCAL

Kind of depends on how many you have per line. You can do up to say 61 pairs per line, technically, but Windows batch scripting is kind of cruddy, so you can't really do an arbitrary number per line.

Edit: Also, >> will append if the file exists. Obviously, that's necessary in the echo, unless you only want one address in the file, but you need to clear out that file somehow on each run. Unless you want a running list from all executions, that is. Generally, I'd just call the batch file and redirect its output on the command line.

Edit 2: I should clarify. You can do 61 or fewer bytes per line, with the possibility of gobbledy-gook for the last set of tokens, as long as you have the %%D%%C%%B%%A, %%H%%G%%F%%E, etc. for them. You just can't have 5 bytes on a line, and then 3 bytes on the next, and have that pair up.

Per "Edit": right, I understand. Generally, I'm just performing this one chunk at a time, and I don't mind Cut/Paste as a suitable method of both putting the finished product somewhere else and clearing the output file.

Per "Edit 2": The problem is, it's all technically one line, since it's just a raw blob. Most of the time, it'll be more than 61 bytes.

Still, once I've got a line-by-line, little-endian input ready, your initial suggestion works perfectly.

Or http://regexr.com?33ru0

Alter to your liking.

That saves even more time Now I just have to copy from a hex editor, paste into the above regex script, copy from the above regex script, paste into a sorting script such as sortmylist.com, break into new lines by space, and it's in its finished form. To make it slightly more efficient, it should be possible to incorporate the newline-by-space step in the regex script, right? I know next to nothing about regex...

[rimsky82]

Paste me an example of what you're starting with, and then a sample of what you want the output to be.

[Lazy Bastard]

OK. For example,

Input:

20 3A 0C 80 7C 2F 0C 80 FC 2F 0C 80 7C 30 0C 80 FC 30 0C 80 E4 31 0C 80 CC 32 0C 80 34 3C 0C 80 78 FE 0C 80 80 01 0D 80 00 F2 0C 80 BC F2 0C 80 54 0B 0C 80 54 0B 0C 80 3C 52 0C 80 64 21 0D 80 A0 3F 0C 80 1C 40 0C 80 A0 3E 0C 80 1C 3F 0C 80 E4 1D 0C 80 EC 1E 0C 80 8C 22 0C 80 94 23 0C 80 54 27 0C 80 5C 28 0C 80 54 0B 0C 80 54 0B 0C 80 54 0B 0C 80 54 0B 0C 80 54 0B 0C 80 54 0B 0C 80 C4 43 0C 80 E8 4E 0C 80 14 42 0D 80 00 43 0D 80 18 0C 0C 80 4C 18 0D 80 20 44 0D 80 EC 50 0C 80 E8 44 0D 80 80 47 0D 80 3C 7C 0C 80 24 1D 0C 80 A8 28 0D 80 94 27 0D 80 CC B1 0C 80 8C B2 0C 80 FC 2B 0C 80 A8 2C 0C 80 54 2D 0C 80 2C 53 0C 80 C0 81 0C 80 88 85 0C 80 30 3F 0D 80 38 40 0D 80 64 3E 0D 80 88 3B 0D 80 18 3C 0D 80 A8 3C 0D 80 8C 36 0D 80 8C 36 0D 80 48 35 0D 80 8C 36 0D 80 60 AF 0C 80 04 30 0D 80 24 31 0D 80 1C B0 0C 80 54 0B 0C 80 28 37 0D 80 54 0B 0C 80 40 38 0D 80 B8 B0 0C 80 60 2C 0D 80 94 2E 0D 80 78 43 0D 80 54 0B 0C 80 58 39 0D 80 54 0B 0C 80 70 3A 0D 80 54 B3 0C 80 F8 B4 0C 80 18 B7 0C 80 C0 B5 0C 80 60 B6 0C 80 50 B4 0C 80 94 1B 0D 80 68 1C 0D 80 20 1F 0D 80 DC 1F 0D 80 98 20 0D 80 8C 29 0D 80 70 2A 0D 80 60 2B 0D 80 B8 1D 0D 80 E8 0B 0C 80 A4 40 0C 80 94 51 0C 80 14 D2 0C 80 E8 D2 0C 80 6C D1 0C 80 54 D5 0C 80 F0 D5 0C 80 70 D7 0C 80 B0 D6 0C 80 BC 54 0C 80 E4 FC 0C 80 54 16 0D 80 5C 19 0D 80 80 1A 0D 80 3C 1D 0D 80 F0 D3 0C 80 AC 45 0C 80 14 54 0C 80 60 41 0D 80 54 A2 0C 80 3C 2F 0D 80 7C A7 0C 80 F4 BB 0C 80 40 BD 0C 80 94 BE 0C 80 DC BF 0C 80 58 C5 0C 80 70 C6 0C 80 8C C7 0C 80 A8 C8 0C 80 24 AA 0C 80 EC C9 0C 80 E0 0D 0C 80 5C 0E 0C 80 74 16 0C 80 14 17 0C 80 B8 17 0C 80 5C BB 0C 80 A4 BC 0C 80 FC BD 0C 80 40 BF 0C 80 98 C0 0C 80 34 C1 0C 80 D4 C1 0C 80 84 C2 0C 80 58 C3 0C 80 04 C4 0C 80 C0 B7 0C 80 58 B8 0C 80 F4 B8 0C 80 8C B9 0C 80 28 BA 0C 80 C0 BA 0C 80 D8 C4 0C 80 EC C5 0C 80 0C C7 0C 80 24 C8 0C 80 44 C9 0C 80 DC 0E 0C 80 58 0F 0C 80 D8 0F 0C 80 7C 10 0C 80 14 12 0C 80 B0 13 0C 80 94 EB 0C 80 40 57 0C 80 98 58 0C 80 E8 5C 0C 80 5C A9 0C 80 EC AA 0C 80 FC AD 0C 80 98 AC 0C 80 24 69 0C 80 D8 6F 0C 80 E8 7C 0C 80 14 85 0C 80 48 67 0C 80 64 6D 0C 80 E8 5C 0C 80 80 5E 0C 80 F4 5F 0C 80 CC 63 0C 80 78 9F 0C 80 20 9A 0C 80 5C 95 0C 80 D8 91 0C 80 4C 81 0C 80 58 A1 0C 80 90 A4 0C 80 94 A3 0C 80 80 5E 0C 80 F4 5F 0C 80 CC 63 0C 80 74 A0 0C 80 54 0B 0C 80 68 56 0C 80 54 73 0C 80 D4 A5 0C 80 F0 75 0C 80 98 8B 0C 80 64 8F 0C 80 80 9D 0C 80 88 9B 0C 80 1C FC 0C 80 44 EE 0C 80 28 F0 0C 80 40 F1 0C 80 18 F7 0C 80 74 F8 0C 80 B8 F9 0C 80 F0 FA 0C 80 84 FB 0C 80 58 18 0C 80 F4 1B 0C 80 C4 D0 0C 80 B4 1A 0C 80 64 32 0D 80 30 33 0D 80 7C 9E 0C 80 84 9C 0C 80 B0 42 0C 80 50 43 0C 80 04 48 0C 80 8C 72 0C 80 2C 5A 0C 80 4C 68 0C 80 80 90 0C 80 04 E9 0C 80 68 CA 0C 80 10 CB 0C 80 3C CC 0C 80 C8 CC 0C 80 BC CB 0C 80 34 D8 0C 80 24 DA 0C 80 28 DC 0C 80 8C DE 0C 80 14 E2 0C 80 F4 E6 0C 80 1C D9 0C 80 0C DB 0C 80 40 DD 0C 80 54 E0 0C 80 80 E4 0C 80 EC 49 0C 80 3C 49 0C 80 D0 46 0C 80 40 4A 0C 80 94 4A 0C 80 6C 50 0C 80 E8 4C 0C 80 40 3D 0D 80 54 CD 0C 80 94 CE 0C 80 E8 CF 0C 80 64 55 0C 80 E8 4D 0C 80 E8 4A 0C 80 CC 3D 0D 80 0C 56 0C 80

Output:

800C3A20
800C2F7C
800C2FFC
800C307C
800C30FC
800C31E4
800C32CC
800C3C34
800CFE78
800D0180
800CF200
800CF2BC
800C0B54
800C0B54
800C523C
800D2164
800C3FA0
800C401C
800C3EA0
800C3F1C
800C1DE4
800C1EEC
800C228C
800C2394
800C2754
800C285C
800C0B54
800C0B54
800C0B54
800C0B54
800C0B54
800C0B54
800C43C4
800C4EE8
800D4214
800D4300
800C0C18
800D184C
800D4420
800C50EC
800D44E8
800D4780
800C7C3C
800C1D24
800D28A8
800D2794
800CB1CC
800CB28C
800C2BFC
800C2CA8
800C2D54
800C532C
800C81C0
800C8588
800D3F30
800D4038
800D3E64
800D3B88
800D3C18
800D3CA8
800D368C
800D368C
800D3548
800D368C
800CAF60
800D3004
800D3124
800CB01C
800C0B54
800D3728
800C0B54
800D3840
800CB0B8
800D2C60
800D2E94
800D4378
800C0B54
800D3958
800C0B54
800D3A70
800CB354
800CB4F8
800CB718
800CB5C0
800CB660
800CB450
800D1B94
800D1C68
800D1F20
800D1FDC
800D2098
800D298C
800D2A70
800D2B60
800D1DB8
800C0BE8
800C40A4
800C5194
800CD214
800CD2E8
800CD16C
800CD554
800CD5F0
800CD770
800CD6B0
800C54BC
800CFCE4
800D1654
800D195C
800D1A80
800D1D3C
800CD3F0
800C45AC
800C5414
800D4160
800CA254
800D2F3C
800CA77C
800CBBF4
800CBD40
800CBE94
800CBFDC
800CC558
800CC670
800CC78C
800CC8A8
800CAA24
800CC9EC
800C0DE0
800C0E5C
800C1674
800C1714
800C17B8
800CBB5C
800CBCA4
800CBDFC
800CBF40
800CC098
800CC134
800CC1D4
800CC284
800CC358
800CC404
800CB7C0
800CB858
800CB8F4
800CB98C
800CBA28
800CBAC0
800CC4D8
800CC5EC
800CC70C
800CC824
800CC944
800C0EDC
800C0F58
800C0FD8
800C107C
800C1214
800C13B0
800CEB94
800C5740
800C5898
800C5CE8
800CA95C
800CAAEC
800CADFC
800CAC98
800C6924
800C6FD8
800C7CE8
800C8514
800C6748
800C6D64
800C5CE8
800C5E80
800C5FF4
800C63CC
800C9F78
800C9A20
800C955C
800C91D8
800C814C
800CA158
800CA490
800CA394
800C5E80
800C5FF4
800C63CC
800CA074
800C0B54
800C5668
800C7354
800CA5D4
800C75F0
800C8B98
800C8F64
800C9D80
800C9B88
800CFC1C
800CEE44
800CF028
800CF140
800CF718
800CF874
800CF9B8
800CFAF0
800CFB84
800C1858
800C1BF4
800CD0C4
800C1AB4
800D3264
800D3330
800C9E7C
800C9C84
800C42B0
800C4350
800C4804
800C728C
800C5A2C
800C684C
800C9080
800CE904
800CCA68
800CCB10
800CCC3C
800CCCC8
800CCBBC
800CD834
800CDA24
800CDC28
800CDE8C
800CE214
800CE6F4
800CD91C
800CDB0C
800CDD40
800CE054
800CE480
800C49EC
800C493C
800C46D0
800C4A40
800C4A94
800C506C
800C4CE8
800D3D40
800CCD54
800CCE94
800CCFE8
800C5564
800C4DE8
800C4AE8
800D3DCC
800C560C

[rimsky82]

http://regexr.com?33s0k

[Pyriel]

Didn't think of using one of those regex tester pages. If you want to be really lazy, stick a "\s*" at the tail end of the expression (instead of the space that's there) so it'll always pick up the last one. There are better ways, but adding complexity to a regex for an ad hoc job is kind of silly.

I might recommend looking up another regex tester. I had the expression highlighted, and clicked in the syntax/sets listing box by accident, and suddenly the flash plugin pegged my CPU and tried to crash my browser. I know of a couple of simpler ones, but I don't think any of them will give a very well-formatted listing of the captured text. The output always has labels and such embedded in it.

[Lazy Bastard]

Didn't think of using one of those regex tester pages. If you want to be really lazy, stick a "\s*" at the tail end of the expression (instead of the space that's there) so it'll always pick up the last one. There are better ways, but adding complexity to a regex for an ad hoc job is kind of silly.

I might recommend looking up another regex tester. I had the expression highlighted, and clicked in the syntax/sets listing box by accident, and suddenly the flash plugin pegged my CPU and tried to crash my browser. I know of a couple of simpler ones, but I don't think any of them will give a very well-formatted listing of the captured text. The output always has labels and such embedded in it.

Nice; that takes care of the trailing offset. There's even a desktop version of the RegExr app (though it's just Adobe Air), so I don't have to bother with working in the browser.

[dnawrkshp]

@LB, it was intended to load binary files and convert the bytes within it to the string representation of each 32 bits. I hadn't realized that you wanted to convert a string to begin with.

Though it looks like you have your solution, you can find where you want to begin reading the data and where you want to end and input that as the Load Offsets (If hex, add 0x). Then input the binary file and that should work.

...and give it an output file to save to, but when I hit Convert, it says "Address not valid!". Any idea?

Oops, I hadn't fully tested it I guess... Fixed.

[Lazy Bastard]

Cool; that will be a useful alternative. Thanks.