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Fix a bug in CFReadStreamGetBuffer for data streams #11

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Dec 8, 2015
Merged

Fix a bug in CFReadStreamGetBuffer for data streams #11

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12 changes: 7 additions & 5 deletions CoreFoundation/Stream.subproj/CFConcreteStreams.c
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Original file line number Diff line number Diff line change
Expand Up @@ -592,21 +592,23 @@ static CFIndex dataRead(CFReadStreamRef stream, UInt8 *buffer, CFIndex bufferLen

static const UInt8 *dataGetBuffer(CFReadStreamRef stream, CFIndex maxBytesToRead, CFIndex *numBytesRead, CFStreamError *error, Boolean *atEOF, void *info) {
_CFReadDataStreamContext *dataCtxt = (_CFReadDataStreamContext *)info;
const UInt8 *bytes = CFDataGetBytePtr(dataCtxt->data);
if (dataCtxt->loc - bytes > maxBytesToRead) {
const UInt8 *bytePtr = CFDataGetBytePtr(dataCtxt->data);
CFIndex length = CFDataGetLength(dataCtxt->data);
CFIndex bytesToRead = bytePtr + length - dataCtxt->loc;
if (bytesToRead > maxBytesToRead) {
*numBytesRead = maxBytesToRead;
*atEOF = FALSE;
} else {
*numBytesRead = dataCtxt->loc - bytes;
*numBytesRead = bytesToRead;
*atEOF = TRUE;
}
error->error = 0;
bytes = dataCtxt->loc;
const UInt8 *buffer = dataCtxt->loc;
dataCtxt->loc += *numBytesRead;
if (dataCtxt->scheduled && !*atEOF) {
CFReadStreamSignalEvent(stream, kCFStreamEventHasBytesAvailable, NULL);
}
return bytes;
return buffer;
}

static Boolean dataCanRead(CFReadStreamRef stream, void *info) {
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