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+/** 
+ * @file llpipeutil.h
+ * @date 2006-05-18
+ * @brief Utility pipe fittings for injecting and extracting strings
+ *
+ * Copyright (c) 2006-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#ifndef LL_LLPIPEUTIL_H
+#define LL_LLPIPEUTIL_H
+
+#include "lliopipe.h"
+
+
+/**
+ * @brief Simple function which pumps for the specified time.
+ */
+F32 pump_loop(LLPumpIO* pump, F32 seconds);
+
+/**
+ * @brief Simple class which writes a string and then marks the stream
+ * as done.
+ */
+class LLPipeStringInjector : public LLIOPipe
+{
+public:
+        LLPipeStringInjector(const std::string& string)
+                : mString(string)
+                { }
+          
+protected:
+    virtual EStatus process_impl(
+                const LLChannelDescriptors& channels,
+                buffer_ptr_t& buffer,
+                bool& eos,
+                LLSD& context,
+                LLPumpIO* pump);
+
+private:
+        std::string mString;
+};
+
+
+class LLPipeStringExtractor : public LLIOPipe
+{
+public:
+        LLPipeStringExtractor() : mDone(false) { }
+        
+        bool done() { return mDone; }
+        std::string string() { return mString; }
+        
+protected:
+        // LLIOPipe API implementation.
+        virtual EStatus process_impl(
+        const LLChannelDescriptors& channels,
+        LLIOPipe::buffer_ptr_t& buffer,
+        bool& eos,
+        LLSD& context,
+        LLPumpIO* pump);
+
+private:
+        bool mDone;
+        std::string mString;
+};
+
+/**
+ * @brief Generate a specified number of bytes of random data
+ */
+class LLIOFuzz : public LLIOPipe
+{
+public:
+        LLIOFuzz(int byte_count) : mByteCount(byte_count) {}
+          
+protected:
+    virtual EStatus process_impl(
+                const LLChannelDescriptors& channels,
+                buffer_ptr_t& buffer,
+                bool& eos,
+                LLSD& context,
+                LLPumpIO* pump);
+
+private:
+        int mByteCount;
+};
+
+/**
+ * @brief Generate some ascii fuz
+ */
+class LLIOASCIIFuzz : public LLIOPipe
+{
+public:
+        LLIOASCIIFuzz(int byte_count) : mByteCount(byte_count) {}
+          
+protected:
+    virtual EStatus process_impl(
+                const LLChannelDescriptors& channels,
+                buffer_ptr_t& buffer,
+                bool& eos,
+                LLSD& context,
+                LLPumpIO* pump);
+
+private:
+        int mByteCount;
+};
+
+
+/**
+ * @brief Pipe that does nothing except return STATUS_OK
+ */
+class LLIONull : public LLIOPipe
+{
+public:
+        LLIONull() {}
+          
+protected:
+    virtual EStatus process_impl(
+                const LLChannelDescriptors& channels,
+                buffer_ptr_t& buffer,
+                bool& eos,
+                LLSD& context,
+                LLPumpIO* pump);
+};
+
+#endif // LL_LLPIPEUTIL_H