Re: AsciiPrint behavior with \n linefeed characters.

["Gao, Liming" <liming.gao@intel.com>]

Tim:
  The first parameter in AsciiPrint() is the Format string. Per PrintLib.h definition, \n will be changed to \r\n in the format string. 

The following end of line(EOL) translations must be performed on the contents of the format string:
     - '\\r' is translated to '\\r'
     - '\\r\\n' is translated to '\\r\\n'
     - '\\n' is translated to '\\r\\n' 
     - '\\n\\r' is translated to '\\r\\n'

Thanks
Liming
-----Original Message-----
From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Tim Lewis
Sent: Friday, October 14, 2016 5:29 AM
To: edk2-devel-01 <edk2-devel@lists.01.org>
Subject: [edk2] AsciiPrint behavior with \n linefeed characters.

In using AsciiPrint (I'm presuming the behavior is also in Print, but I haven't tested), I found an interesting behavior for linefeed characters embedded in strings that are parameters. I post it here just so people who are mystified by their output can understand it.

Consider this example:

CONST CHAR16 *XyzStr = "HI\nBYE";

AsciiPrint(XyzStr);
AsciiPrint("Offset\n%s\n", XyzStr);

Output looks like this:

HI
BYE
Offset
HI
   BYE

It turns out that \n characters in the format string are converted to \r\n, but \n characters in strings that are embedded (as in the second example) are not converted. So only the linefeed character is interpreted, leading to "BYE" being suspended one character to the right and one row lower than "HI"
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