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Implementation of ReadSegments to support less copying in the parser. r=rpotts, sr=jst

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git-svn-id: svn://10.0.0.236/trunk@83551 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
vidur%netscape.com
2000-12-12 21:57:47 +00:00
parent 2afdb2a411
commit 65d3ffed0d
5 changed files with 104 additions and 27 deletions
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26
mozilla/xpcom/io/nsByteArrayInputStream.cpp
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@@ -82,10 +82,30 @@ nsByteArrayInputStream::Read (char* aBuffer, PRUint32 aCount, PRUint32 *aNumRead
}
NS_IMETHODIMP
nsByteArrayInputStream::ReadSegments(nsWriteSegmentFun writer, void * closure, PRUint32 count, PRUint32 *_retval)
nsByteArrayInputStream::ReadSegments(nsWriteSegmentFun writer, void * aClosure, PRUint32 aCount, PRUint32 *aNumRead)
{
NS_NOTREACHED("ReadSegments");
return NS_ERROR_NOT_IMPLEMENTED;
nsresult rv = NS_OK;
if (aNumRead == NULL)
return NS_ERROR_NULL_POINTER;
if (_nbytes == 0)
return NS_ERROR_FAILURE;
if (aCount == 0 || _pos == _nbytes)
*aNumRead = 0;
else {
NS_ASSERTION (_buffer != NULL, "Stream buffer has been released - there's an ownership problem somewhere!");
PRUint32 readCount = PR_MIN(aCount, (_nbytes - _pos));
if (_buffer == NULL)
*aNumRead = 0;
else
rv = writer (this, aClosure, &_buffer[_pos],
_pos, readCount, aNumRead);
_pos += *aNumRead;
}
return rv;
}
NS_IMETHODIMP