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From: Andrew Fish <afish@apple.com>
To: krishnaLee <sssky307@163.com>
Cc: edk2-devel@lists.01.org
Subject: Re: [question] A piece of log.txt showed in uefi shell is not the same as showed in notepad++
Date: Thu, 24 Jan 2019 09:45:00 -0800	[thread overview]
Message-ID: <44D582EC-9551-4C45-8D94-893F1BC08F43@apple.com> (raw)
In-Reply-To: <5860630.8aaa.1687eafa2d7.Coremail.sssky307@163.com>

Krishna,

From an EFI point of view BackSpace 0x08, LF 0x0A, and CR 0xD are defined for a ConOut device. 

From Ascii Control Codes:
0x0C - Form Feed
0x0E - Shift Out

The Shift Out is used with graphics characters. 

How did you dump the log? If EFI sends data to a serial terminal then it would use terminal emulation and the output stream would look different. 

Thanks,

Andrew Fish

> On Jan 23, 2019, at 11:07 PM, krishnaLee <sssky307@163.com> wrote:
> 
> Andrew Fish,
> thank you,in this case,you are right.
> but I think there may be other case that the user data just contain some nosense-data
> such as { UINT16 MyData[]={0x000c,0x000d,0x000d,0x000e}  } to the editor, 
> the uefi editor may also meet this question,the editor may do not need output this,
> but the editor should make sure other visible chars can output normal...
> 
> I don't know if it is a bug or not.
> 
> Thank you very much.
> krishna.
> 
> 
> 
> 
> 在 2019-01-24 12:13:50，"Andrew Fish" <afish@apple.com> 写道：
>> On Jan 23, 2019, at 7:17 PM, krishnaLee <sssky307@163.com <mailto:sssky307@163.com>> wrote:
>> 
>> Hi,
>> I dumped a small log.txt from my work,but the log.txt showed in uefi shell,is not the same as it showed in notepad++.
>> I had upload the log here:
>> https://github.com/krishna116/test/blob/master/log.zip <https://github.com/krishna116/test/blob/master/log.zip>
>> 
>> 
>> it seems the log showed in uefi shell had missed some strings...I don't know why,please help,
>> 
> 
> Krishna,
> 
> Your log.txt looks like a normal UTF-16 Unicode file. The leading  FF FE is the Byte order mark for UTF-16 Little Endian [1].  The file looks like it has CR line endings [2] so maybe that is confusing your editor? There seems to be a CR LF at the end, so the mixture of line ending may even be more likely confusing the editor. The byte order mark should let your editor know it is 16-bit Unicode and the correct endian. Hope this helps...
> 
> $ hexdump -C /Users/andrewfish/Downloads/log/log.txt 
> 00000000  ff fe 20 00 20 00 20 00  4d 00 58 00 32 00 35 00  |.. . . .M.X.2.5.|
> 00000010  4c 00 31 00 32 00 38 00  37 00 35 00 46 00 20 00  |L.1.2.8.7.5.F. .|
> 00000020  20 00 20 00 20 00 49 00  44 00 3a 00 30 00 78 00  | . . .I.D.:.0.x.|
> 00000030  43 00 32 00 32 00 30 00  31 00 38 00 20 00 20 00  |C.2.2.0.1.8. . .|
> 00000040  20 00 20 00 53 00 69 00  7a 00 65 00 3a 00 20 00  | . .S.i.z.e.:. .|
> 00000050  31 00 36 00 33 00 38 00  34 00 4b 00 42 00 20 00  |1.6.3.8.4.K.B. .|
> 00000060  28 00 31 00 33 00 31 00  30 00 37 00 32 00 4b 00  |(.1.3.1.0.7.2.K.|
> 00000070  62 00 29 00 20 00 20 00  20 00 20 00 20 00 20 00  |b.). . . . . . .|
> 00000080  20 00 20 00 20 00 20 00  20 00 20 00 20 00 20 00  | . . . . . . . .|
> *
> 000000c0  20 00 20 00 20 00 20 00  0d 00 0d 00 20 00 20 00  | . . . ..... . .|
> 000000d0  20 00 20 00 20 00 20 00  20 00 20 00 20 00 20 00  | . . . . . . . .|
> *
> 00000190  20 00 20 00 0d 00 0d 00  20 00 20 00 20 00 20 00  | . ..... . . . .|
> 000001a0  4d 00 58 00 32 00 35 00  4c 00 36 00 34 00 37 00  |M.X.2.5.L.6.4.7.|
> 000001b0  33 00 45 00 20 00 20 00  20 00 20 00 49 00 44 00  |3.E. . . . .I.D.|
> 000001c0  3a 00 30 00 78 00 43 00  32 00 32 00 30 00 31 00  |:.0.x.C.2.2.0.1.|
> 000001d0  37 00 20 00 20 00 20 00  20 00 53 00 69 00 7a 00  |7. . . . .S.i.z.|
> 000001e0  65 00 3a 00 20 00 38 00  31 00 39 00 32 00 4b 00  |e.:. .8.1.9.2.K.|
> 000001f0  42 00 20 00 28 00 36 00  35 00 35 00 33 00 36 00  |B. .(.6.5.5.3.6.|
> 00000200  4b 00 62 00 29 00 20 00  20 00 20 00 20 00 20 00  |K.b.). . . . . .|
> 00000210  20 00 20 00 20 00 20 00  20 00 20 00 20 00 20 00  | . . . . . . . .|
> *
> 00000260  0d 00 0d 00 20 00 20 00  20 00 20 00 20 00 20 00  |.... . . . . . .|
> 00000270  20 00 20 00 20 00 20 00  20 00 20 00 20 00 20 00  | . . . . . . . .|
> *
> 00000320  20 00 20 00 20 00 20 00  20 00 20 00 0d 00 0d 00  | . . . . . .....|
> 00000330  53 00 50 00 49 00 20 00  42 00 41 00 52 00 3a 00  |S.P.I. .B.A.R.:.|
> 00000340  20 00 46 00 45 00 30 00  31 00 30 00 30 00 30 00  | .F.E.0.1.0.0.0.|
> 00000350  30 00 20 00 20 00 20 00  20 00 20 00 20 00 20 00  |0. . . . . . . .|
> 00000360  20 00 20 00 20 00 20 00  20 00 20 00 20 00 20 00  | . . . . . . . .|
> *
> 000003f0  20 00 20 00 20 00 20 00  0d 00 0d 00 20 00 20 00  | . . . ..... . .|
> 00000400  20 00 20 00 20 00 20 00  20 00 20 00 20 00 20 00  | . . . . . . . .|
> *
> 000004c0  20 00 20 00 0d 00 0d 00  46 00 50 00 54 00 20 00  | . .....F.P.T. .|
> 000004d0  4f 00 70 00 65 00 72 00  61 00 74 00 69 00 6f 00  |O.p.e.r.a.t.i.o.|
> 000004e0  6e 00 20 00 53 00 75 00  63 00 63 00 65 00 73 00  |n. .S.u.c.c.e.s.|
> 000004f0  73 00 66 00 75 00 6c 00  2e 00 20 00 20 00 20 00  |s.f.u.l... . . .|
> 00000500  20 00 20 00 20 00 20 00  20 00 20 00 20 00 20 00  | . . . . . . . .|
> *
> 00000590  0d 00 0d 00 20 00 20 00  20 00 20 00 20 00 20 00  |.... . . . . . .|
> 000005a0  20 00 20 00 20 00 20 00  20 00 20 00 20 00 20 00  | . . . . . . . .|
> *
> 00000650  20 00 20 00 20 00 20 00  20 00 20 00 0d 00 0d 00  | . . . . . .....|
> 00000660  0d 00 0a 00                                       |....|
> 00000664
> 
> 
> [1] https://en.wikipedia.org/wiki/Byte_order_mark#UTF-16 <https://en.wikipedia.org/wiki/Byte_order_mark#UTF-16>
> [2] https://en.wikipedia.org/wiki/Newline <https://en.wikipedia.org/wiki/Newline>
> 
> Thanks,
> 
> Andrew Fish
> 
> 
>> 
>> thank you,
>> by krishna.
>> 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> edk2-devel mailing list
>> edk2-devel@lists.01.org <mailto:edk2-devel@lists.01.org>
>> https://lists.01.org/mailman/listinfo/edk2-devel
> 



  reply	other threads:[~2019-01-24 17:46 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-24  3:17 [question] A piece of log.txt showed in uefi shell is not the same as showed in notepad++ krishnaLee
     [not found] ` <A2150871-41DF-42B0-8131-1EF20D952F4F@apple.com>
2019-01-24  7:07   ` krishnaLee
2019-01-24 17:45     ` Andrew Fish [this message]
2019-01-25  3:10       ` krishnaLee

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