Hi,All:
may be I should reply this to EDK2 group,I had attached my file again.
After many test,my right key of "ls | grep -trim-last 0 | grep -trim-last 0" is:
1,before pipe out the buffer,trim off all in-visible wchars at end of this
buffer, (the trimed of wchar is "like ASCII's range of" 0x0000~0x0020. )
2,always make sure outputBuffer[lastTwoWchar] = { 0x000A,0x000D },it will
also bypass many other strange result.
thank you,
by krishna.
At 2018-07-06 11:07:05, "krishnaLee" <[email protected]> wrote:
Jim,
I attached the smalltest.efi if you have not compiled the test code.
I am in developing of this grep.efi tool,I can now bypass the test-1 question
by follow command:
ls | grep -trim-last 0
ls | grep -trim-last 0 | grep -trim-last 0
I also attached this grep.efi tool, it almost ok :)
//draft usage guide-------------------------------------------------
//if find ok,returncode 1,Print(string);else returncode 0;
grep.efi -find string
//get first word,
//the front and the end in-visible chars of this word will be trimed off;
grep.efi -first
//get back part after the string.
grep.efi -begin-at string
//get front part before the string
grep.efi -end-at string
//trim off first n chars at front
//before start -trim-first,the front in-visible chars will be trimed off;
grep.efi -trim-first n
//trim off back n chars at end,
//before start -trim-last,the end in-visible chars will be trimed off;
grep.efi -trim-last n
//trim off whitespace at front and end,
//trim off in-visible chars infact;
grep.efi -trim-space
thank you,
by krishna.
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