5 #ifndef CRYPTOPP_IMPORTS
12 static const unsigned int s_maxAutoNodeSize = 16*1024;
25 inline size_t MaxSize()
const {
return buf.
size();}
27 inline size_t CurrentSize()
const
32 inline bool UsedUp()
const
34 return (m_head==MaxSize());
42 inline size_t Put(
const byte *begin,
size_t length)
45 if (!begin || !length)
return length;
46 size_t l =
STDMIN(length, MaxSize()-m_tail);
47 if (buf+m_tail != begin)
48 memcpy(buf+m_tail, begin, l);
53 inline size_t Peek(
byte &outByte)
const
62 inline size_t Peek(
byte *target,
size_t copyMax)
const
64 size_t len =
STDMIN(copyMax, m_tail-m_head);
65 memcpy(target, buf+m_head, len);
71 size_t len = m_tail-m_head;
78 size_t len =
STDMIN(copyMax, m_tail-m_head);
83 inline size_t Get(
byte &outByte)
85 size_t len = Peek(outByte);
90 inline size_t Get(
byte *outString,
size_t getMax)
92 size_t len = Peek(outString, getMax);
99 size_t len = m_tail-m_head;
107 size_t len =
UnsignedMin(m_tail-m_head, transferMax);
113 inline size_t Skip(
size_t skipMax)
115 size_t len =
STDMIN(skipMax, m_tail-m_head);
120 inline byte operator[](
size_t i)
const
122 return buf[m_head+i];
128 size_t m_head, m_tail;
135 , m_head(NULL), m_tail(NULL), m_lazyString(NULL), m_lazyLength(0), m_lazyStringModifiable(false)
137 SetNodeSize(nodeSize);
141 void ByteQueue::SetNodeSize(
size_t nodeSize)
143 m_autoNodeSize = !nodeSize;
144 m_nodeSize = m_autoNodeSize ? 256 : nodeSize;
153 void ByteQueue::CopyFrom(
const ByteQueue ©)
156 m_autoNodeSize = copy.m_autoNodeSize;
157 m_nodeSize = copy.m_nodeSize;
160 for (
ByteQueueNode *current=copy.m_head->next; current; current=current->next)
163 m_tail = m_tail->next;
168 Put(copy.m_lazyString, copy.m_lazyLength);
171 ByteQueue::~ByteQueue()
176 void ByteQueue::Destroy()
178 for (
ByteQueueNode *next, *current=m_head; current; current=next)
191 lword ByteQueue::CurrentSize()
const
195 for (
ByteQueueNode *current=m_head; current; current=current->next)
196 size += current->CurrentSize();
198 return size + m_lazyLength;
201 bool ByteQueue::IsEmpty()
const
203 return m_head==m_tail && m_head->CurrentSize()==0 && m_lazyLength==0;
206 void ByteQueue::Clear()
208 for (
ByteQueueNode *next, *current=m_head->next; current; current=next)
220 size_t ByteQueue::Put2(
const byte *inString,
size_t length,
int messageEnd,
bool blocking)
222 CRYPTOPP_UNUSED(messageEnd), CRYPTOPP_UNUSED(blocking);
224 if (m_lazyLength > 0)
228 while ((len=m_tail->Put(inString, length)) < length)
232 if (m_autoNodeSize && m_nodeSize < s_maxAutoNodeSize)
237 while (m_nodeSize < length && m_nodeSize < s_maxAutoNodeSize);
239 m_tail = m_tail->next;
245 void ByteQueue::CleanupUsedNodes()
248 while (m_head && m_head != m_tail && m_head->UsedUp())
256 if (m_head && m_head->CurrentSize() == 0)
260 void ByteQueue::LazyPut(
const byte *inString,
size_t size)
262 if (m_lazyLength > 0)
265 if (inString == m_tail->buf+m_tail->m_tail)
269 m_lazyString =
const_cast<byte *
>(inString);
271 m_lazyStringModifiable =
false;
275 void ByteQueue::LazyPutModifiable(
byte *inString,
size_t size)
277 if (m_lazyLength > 0)
279 m_lazyString = inString;
281 m_lazyStringModifiable =
true;
284 void ByteQueue::UndoLazyPut(
size_t size)
286 if (m_lazyLength < size)
287 throw InvalidArgument(
"ByteQueue: size specified for UndoLazyPut is too large");
289 m_lazyLength -= size;
292 void ByteQueue::FinalizeLazyPut()
294 size_t len = m_lazyLength;
297 Put(m_lazyString, len);
302 if (m_head->Get(outByte))
304 if (m_head->UsedUp())
308 else if (m_lazyLength > 0)
310 outByte = *m_lazyString++;
326 if (m_head->Peek(outByte))
328 else if (m_lazyLength > 0)
330 outByte = *m_lazyString;
340 return (
size_t)
CopyTo(sink, peekMax);
347 lword bytesLeft = transferBytes;
348 for (
ByteQueueNode *current=m_head; bytesLeft && current; current=current->next)
349 bytesLeft -= current->TransferTo(target, bytesLeft, channel);
352 size_t len = (size_t)
STDMIN(bytesLeft, (lword)m_lazyLength);
355 if (m_lazyStringModifiable)
358 target.
ChannelPut(channel, m_lazyString, len);
363 transferBytes -= bytesLeft;
369 size_t blockedBytes = walker.
TransferTo2(target, transferBytes, channel, blocking);
379 lword transferBytes = end-begin;
380 size_t blockedBytes = walker.
TransferTo2(target, transferBytes, channel, blocking);
381 begin += transferBytes;
385 void ByteQueue::Unget(
byte inByte)
390 void ByteQueue::Unget(
const byte *inString,
size_t length)
392 size_t len =
STDMIN(length, m_head->m_head);
394 m_head->m_head -= len;
395 memcpy(m_head->buf + m_head->m_head, inString + length, len);
400 newHead->next = m_head;
402 m_head->Put(inString, length);
406 const byte * ByteQueue::Spy(
size_t &contiguousSize)
const
408 contiguousSize = m_head->m_tail - m_head->m_head;
409 if (contiguousSize == 0 && m_lazyLength > 0)
411 contiguousSize = m_lazyLength;
415 return m_head->buf + m_head->m_head;
420 if (m_lazyLength > 0)
423 if (m_tail->m_tail == m_tail->MaxSize())
426 m_tail = m_tail->next;
429 size = m_tail->MaxSize() - m_tail->m_tail;
430 return m_tail->buf + m_tail->m_tail;
440 bool ByteQueue::operator==(
const ByteQueue &rhs)
const
442 const lword currentSize = CurrentSize();
444 if (currentSize != rhs.CurrentSize())
447 Walker walker1(*
this), walker2(rhs);
450 while (walker1.Get(b1) && walker2.Get(b2))
457 byte ByteQueue::operator[](lword i)
const
459 for (
ByteQueueNode *current=m_head; current; current=current->next)
461 if (i < current->CurrentSize())
462 return (*current)[(size_t)i];
464 i -= current->CurrentSize();
468 return m_lazyString[i];
473 std::swap(m_autoNodeSize, rhs.m_autoNodeSize);
474 std::swap(m_nodeSize, rhs.m_nodeSize);
475 std::swap(m_head, rhs.m_head);
476 std::swap(m_tail, rhs.m_tail);
477 std::swap(m_lazyString, rhs.m_lazyString);
478 std::swap(m_lazyLength, rhs.m_lazyLength);
479 std::swap(m_lazyStringModifiable, rhs.m_lazyStringModifiable);
486 CRYPTOPP_UNUSED(parameters);
488 m_node = m_queue.m_head;
491 m_lazyString = m_queue.m_lazyString;
492 m_lazyLength = m_queue.m_lazyLength;
510 return (
size_t)
CopyTo(sink, 1);
516 return (
size_t)
CopyTo(sink, peekMax);
521 lword bytesLeft = transferBytes;
522 size_t blockedBytes = 0;
526 size_t len = (size_t)
STDMIN(bytesLeft, (lword)m_node->CurrentSize()-m_offset);
527 blockedBytes = target.
ChannelPut2(channel, m_node->buf+m_node->m_head+m_offset, len, 0, blocking);
541 m_node = m_node->next;
545 if (bytesLeft && m_lazyLength)
547 size_t len = (size_t)
STDMIN(bytesLeft, (lword)m_lazyLength);
548 blockedBytes = target.
ChannelPut2(channel, m_lazyString, len, 0, blocking);
558 transferBytes -= bytesLeft;
566 lword transferBytes = end-begin;
567 size_t blockedBytes = walker.
TransferTo2(target, transferBytes, channel, blocking);
568 begin += transferBytes;