rename ExpectedStorage::isThis to isSelfAssign so that the self-assign check in opera...

[folly.git] / folly / io / IOBufQueue.h

diff --git a/folly/io/IOBufQueue.h b/folly/io/IOBufQueue.h
index bbf28fe9f9a7fee2a600ca27d67c05a9cea4d66d..30b7fed3a6473a230ad5c709d4c09c03fb128ac5 100644 (file)
--- a/folly/io/IOBufQueue.h
+++ b/folly/io/IOBufQueue.h
@@ -195,7 +195,17 @@ class IOBufQueue {
    * @throws std::underflow_error if n exceeds the number of bytes
    *         in the queue.
    */
-  std::unique_ptr<folly::IOBuf> split(size_t n);
+  std::unique_ptr<folly::IOBuf> split(size_t n) {
+    return split(n, true);
+  }
+
+  /**
+   * Similar to split, but will return the entire queue instead of throwing
+   * if n exceeds the number of bytes in the queue.
+   */
+  std::unique_ptr<folly::IOBuf> splitAtMost(size_t n) {
+    return split(n, false);
+  }
 
   /**
    * Similar to IOBuf::trimStart, but works on the whole queue.  Will
@@ -283,6 +293,8 @@ class IOBufQueue {
   std::pair<void*,uint64_t> preallocateSlow(
     uint64_t min, uint64_t newAllocationSize, uint64_t max);
 
+  std::unique_ptr<folly::IOBuf> split(size_t n, bool throwOnUnderflow);
+
   static const size_t kChainLengthNotCached = (size_t)-1;
   /** Not copyable */
   IOBufQueue(const IOBufQueue&) = delete;