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[0.4.9][CONUTILS] Fix regression with file redirection of 'more' CORE-14592

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In ConWrite(), emit an \r when a \n is encountered but not already preceded by \r.

And, don't emit \r\n when an \r alone is encountered.
This fixes the problem of extra newlines appearing when redirecting
"more" output to a file.

It regressed somewhere in between SVN [r68849-r73441], most likely with some
commit that touched 'conutils' or 'more'.

fix picked from commit 0.4.11-dev-1-g
b277cbdf22
This commit is contained in:
Joachim Henze 2020-11-11 17:39:36 +01:00
parent 144976843a
commit 07ff621b4b
1 changed files with 42 additions and 28 deletions
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70
sdk/lib/conutils/outstream.c
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@ -162,36 +162,43 @@ ConWrite(
/*
* Find any newline character in the buffer,
* write the part BEFORE the newline, then write
* a carriage-return + newline, and then write
* the remaining part of the buffer.
* write the part BEFORE the newline, then emit
* a carriage-return + newline sequence and finally
* write the remaining part of the buffer.
*
* This fixes output in files and serial console.
*/
while (len > 0)
{
/* Loop until we find a \r or \n character */
// FIXME: What about the pair \r\n ?
/* Loop until we find a newline character */
p = szStr;
while (len > 0 && *(PWCHAR)p != L'\r' && *(PWCHAR)p != L'\n')
while (len > 0 && *(PWCHAR)p != L'\n')
{
/* Advance one character */
p = (PVOID)((PWCHAR)p + 1);
len--;
--len;
}
/* Write everything up to \r or \n */
/* Write everything up to \n */
dwNumBytes = ((PWCHAR)p - (PWCHAR)szStr) * sizeof(WCHAR);
WriteFile(Stream->hHandle, szStr, dwNumBytes, &dwNumBytes, NULL);
/* If we hit \r or \n ... */
if (len > 0 && (*(PWCHAR)p == L'\r' || *(PWCHAR)p == L'\n'))
/*
* If we hit a newline and the previous character is not a carriage-return,
* emit a carriage-return + newline sequence, otherwise just emit the newline.
*/
if (len > 0 && *(PWCHAR)p == L'\n')
{
/* ... send a carriage-return + newline sequence and skip \r or \n */
WriteFile(Stream->hHandle, L"\r\n", 2 * sizeof(WCHAR), &dwNumBytes, NULL);
szStr = (PVOID)((PWCHAR)p + 1);
len--;
if (p == (PVOID)szStr || (p > (PVOID)szStr && *((PWCHAR)p - 1) != L'\r'))
WriteFile(Stream->hHandle, L"\r\n", 2 * sizeof(WCHAR), &dwNumBytes, NULL);
else
WriteFile(Stream->hHandle, L"\n", sizeof(WCHAR), &dwNumBytes, NULL);
/* Skip \n */
p = (PVOID)((PWCHAR)p + 1);
--len;
}
szStr = p;
}
#ifndef _UNICODE
@ -239,36 +246,43 @@ ConWrite(
/*
* Find any newline character in the buffer,
* write the part BEFORE the newline, then write
* a carriage-return + newline, and then write
* the remaining part of the buffer.
* write the part BEFORE the newline, then emit
* a carriage-return + newline sequence and finally
* write the remaining part of the buffer.
*
* This fixes output in files and serial console.
*/
while (len > 0)
{
/* Loop until we find a \r or \n character */
// FIXME: What about the pair \r\n ?
/* Loop until we find a newline character */
p = szStr;
while (len > 0 && *(PCHAR)p != '\r' && *(PCHAR)p != '\n')
while (len > 0 && *(PCHAR)p != '\n')
{
/* Advance one character */
p = (PVOID)((PCHAR)p + 1);
len--;
--len;
}
/* Write everything up to \r or \n */
/* Write everything up to \n */
dwNumBytes = ((PCHAR)p - (PCHAR)szStr) * sizeof(CHAR);
WriteFile(Stream->hHandle, szStr, dwNumBytes, &dwNumBytes, NULL);
/* If we hit \r or \n ... */
if (len > 0 && (*(PCHAR)p == '\r' || *(PCHAR)p == '\n'))
/*
* If we hit a newline and the previous character is not a carriage-return,
* emit a carriage-return + newline sequence, otherwise just emit the newline.
*/
if (len > 0 && *(PCHAR)p == '\n')
{
/* ... send a carriage-return + newline sequence and skip \r or \n */
WriteFile(Stream->hHandle, "\r\n", 2, &dwNumBytes, NULL);
szStr = (PVOID)((PCHAR)p + 1);
len--;
if (p == (PVOID)szStr || (p > (PVOID)szStr && *((PCHAR)p - 1) != '\r'))
WriteFile(Stream->hHandle, "\r\n", 2, &dwNumBytes, NULL);
else
WriteFile(Stream->hHandle, "\n", 1, &dwNumBytes, NULL);
/* Skip \n */
p = (PVOID)((PCHAR)p + 1);
--len;
}
szStr = p;
}
#ifdef _UNICODE