initial checkin of 0.26 src tarball

AUTHORS

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+Brian Aker, brian@tangent.org -- Client Library, Tools
+Mark Atwood, -- Tools, Docs
+Patrick Galbraith, -- C++ Interface
+Tim Bunce, -- Docs
+Trond Norbye, trond.norbye@sun.com -- Binary protocol, Misc
+Yin Chen, -- Ketama Work
+Toru Maesaka, dev@torum.net -- Stats analysis

COPYING

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+Software License Agreement (BSD License)
+
+Copyright (c) 2007, TangentOrg (Brian Aker)
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+    * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+
+    * Neither the name of TangentOrg nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

ChangeLog

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+0.26 Thu Jan 29 13:05:50 PST 2009
+  * Fix for decrement on hash key
+  * Fixed assert that was catching bad memset() call in host_reset()
+  * Fix purge issue for blocked IO which has been stacked.
+
+0.25 Fri Nov 28 09:59:35 PST 2008
+  * Jenkins HASH added.
+  * Update of Murmur hash code
+  * Support explicit weights (Robey Pointer, Evan Weaver)
+  * Bugfix for ketama continuum (Robey Pointer)
+  * New behavior MEMCACHED_BEHAVIOR_HASH_WITH_PREFIX_KEY (Robey Pointer)
+  * Don't ever call stats for weighting servers, because it is unstable.
+
+0.24 Tue Sep 16 02:59:03 PDT 2008 (never released)
+  * Cleanup compile warnings.
+  * Fix issues in partitioning by keys.
+  * Fixed "fail case" to make sure when calling memcached_clone() no
+    memcached_st is over written.
+  * New memcached_server_by_key() method for finding a server from 
+    a key.
+  * memcached_server_free() was added for freeing server structures.
+
+
+0.23 Sun Sep  7 08:13:59 PDT 2008
+  * Added strings.h header for Solaris 9
+  * Solaris 64bit fix.
+  * Support for weighted Ketama from Yin Chen.
+  * Fix for Chinese 
+  * Fix for 0 length key to trigger bad key.
+  * Added behaviors MEMCACHED_BEHAVIOR_SND_TIMEOUT, MEMCACHED_BEHAVIOR_RCV_TIMEOUT
+  * Support for Binary Protocol added
+
+0.22 Mon Jul 14 09:24:11 PDT 2008
+  * Fix where master key was no being checked for "bad key"
+  * Fixed bugs in stats output (thread output was wrong)
+  * Clarified MEMCACHED_BAD_KEY_PROVIDED is return for bad prefix key.
+  * Found a bug in Flags return (Jacek Ostrowski)
+  * Fixed issue with compiling on Visual Studio
+
+0.21 Fri May 23 18:34:09 PDT 2008
+  * Change of char * to const char * for all key based functions.
+  * New  MEMCACHED_CALLBACK_PREFIX_KEY added. You can now create domains for
+    values.
+  * Fixed bug introducd in last version on memcp
+  * Fix for death of file io to call shutdown()
+
+0.20 Mon May  5 08:34:26 PDT 2008
+  * New consistent distribution tests.
+  * Found a memory leak when a server constantly fails.
+  * Fix in watchpoint macro
+  * Changed default timeout to 1 second for poll timeouts
+  * Wheel uses less memory/dynamic allocation for size (no longer limited to
+    512 hosts by default.
+  * memslap memory leak fix
+  * Added Ketama distribution
+  * Fix assert.h compile problem on CentOS
+
+0.19 Wed Apr  9 09:30:53 PDT 2008
+  * Documentation fix in libmemcached.
+  * Fixed bug where sort was always occuring on hosts
+  * Logic fix in branch prediction (thanks Jay!)
+  * Read through cached support.
+  * Fixed for cas by key operation.
+  * Fix for memcached_server_st list structures to have correct count.
+  * Added callback MEMCACHED_CALLBACK_DELETE_TRIGGER
+  * Removed function call in favor of macro (aka cut out some instructions)
+
+
+0.18 Sun Mar 16 21:57:55 PDT 2008
+  * Fix plus tests for non-zero value objects and flags.
+  * MEMCACHED_HASH_MURMUR added for murmur algorithm provided.
+  * MEMCACHED_BEHAVIOR_RETRY_TIMEOUT added to keep connecting from looping
+    on timeout.
+  * gcc branch prediction optimizations
+  * Refactored entire tree to make include files cleaner
+  * Fixed leaked socket.
+
+0.17 Wed Feb 27 03:33:29 PST 2008
+  * MEMCACHED_BEHAVIOR_CONNECT_TIMEOUT added for connect timeout in
+    non-block mode.
+  * Incompatible change in memcached_behavior_set() api. We now use a 
+    uint64_t, instead of a pointer.
+  * Fix for storage of values for zero.
+  * memcached_server_cursor() function added to API for cycling through servers.
+
+0.16 Mon Feb 18 00:30:25 PST 2008
+  * Work on the UDP protocol
+  * Added get_by_key, set_by_key tests for C++ API
+  * Fix for limit_maxbytes to be 64bit in stats
+  * Added Atom Smasher test (scale baby, scale!)
+  * Servers are now sorted, meaning that servers are now ordered so that
+    clients with the same lists, will have same distribution. (Idea from
+    Ross McFarland). MEMCACHED_BEHAVIOR_SORT_HOSTS was added to enable
+    this support.
+  * Added MEMCACHED_BAD_KEY_PROVIDED error for auto, set, and get operations.
+    MEMCACHED_BEHAVIOR_VERIFY_KEY was added to enable this feature.
+  * More error messages on command line tools.
+  * Fixed bugs in memcached_cas() operator.
+  * Fix to loop through interfaces
+
+0.15 Tue Jan 29 14:55:44 PST 2008
+  * More work on the C++ API.
+  * Bug fixes around block corner cases.
+  * Slight performance increase in both read() and write().
+
+0.14 Tue Jan 22 06:21:49 PST 2008
+  * For for bug found by Evan Weaver where increment() was not returning
+    propper error of value was not found.
+  * Fix for bad null pointer on flag by Toru Maesaka.
+  * Refactor of all IO to just pass in the active server
+  * Problem configuring (PKG_CHECK_MODULES) fixed by removal of "rpath" in 
+    support/libmemcached.pc.in (Thanks to Ross McFarland).
+  * Added memcached_callback_get()/set()
+  * First prototype of C++ interface
+  * Updated docs for uint16_t changes in previous release
+
+0.13 Sun Jan 13 06:51:50 PST 2008
+  * MEMCACHED_BEHAVIOR_USER_DATA added to store user pointer.
+  * Fix for failure to connect to invalidate socket.
+  * Patch from Marc Rossi to add --hash option for memcp, memrm, and memcat.
+  * Kevin's patch for fixing EOF issues during a read.
+  * Toru Maesaka patch for stats mismatch
+  * Fix for when CRC return 0
+  * Fixed uint16_t issues around flags. Turns out the documentation on the
+    protocol was wrong.
+  * Lingering socket fixes for FreeBSD.
+  * Patches from Kevin Dalley for FreeBSD 4.0
+  * Added multi delete functions.
+  * All get key returns have C style null termination
+  * If memcached_server_list_append is passed NULLs instead of pointers it
+    returns NULL.  
+  * Added memcached_fetch_execute() method
+  * Found a bug where memcached_fetch() was not null terminating the result
+    value.
+  * memcached_behavior() now has the ability to set "buffering" so that
+    data is not automatically flushed.
+  * Behavior change, buffered commands now return MEMCACHED_BUFFERED
+
+0.12 Tue Dec 11 15:20:55 PST 2007
+  * Updates for consistent hashing
+  * IPV6 support
+  * Static allocation for hostname (performance)
+  * Fixed bug where in non-block mode all data might not have been sent on
+    close().
+  * Refactor of memcached_get() to use common code.
+  * Change in value fetch, MEMCACHED_END is now returned when keys are no
+    longer in the pipe.
+  * Fixed bug where key could be out of range of characters
+  * Added _by_key() methods to allow partitioning of values to particular
+    servers.
+  * MEMCACHED_DEFAILT_TIMEOUT is now set to a non -1 value.
+  * Performance improvements in get operations.
+
+0.11 Mon Nov 26 01:05:52 PST 2007
+  * Added option to memcache_behavior_set() so that poll() can be timed out.
+  * Fixed memory leak in case of using memcached_fetch_result() where no
+    value was returned.
+  * Bug fixed in memcached_connect() which would cause servers that 
+    did not need to be enabled to be enabled (performance issue).
+  * Rewrote bounds checking code for get calls.
+  * "make test" now starts its own memcached servers.
+  * Added Hseih hash (MEMCACHED_HASH_HSIEH), which is showing about 7%
+    performance over standard hash.
+
+0.10 Tue Nov 20 23:22:31 PST 2007
+  * Added append binary test.
+  * Added MEMCACHED_BEHAVIOR_CACHE_LOOKUPS behavior so that you can save on
+    multiple DNS lookups.
+  * Added CAS support, though this is optional and must be enabled during
+    runtime.
+  * Added the utility memerror to create human readable error strings
+    from memcached errors (aka convert ints to strings)
+  * Fixed type in MEMCACHED_HOST_LOOKUP_FAILURE
+  * Fixed bug where hostname might not be null terminated
+  * Moved to using gethostbyname_r() on Linux to solve thread safety issue
+  * Added -rpath support for pkg-config
+  * Documentation fix for hash setting using memcached_behavior_set()
+
+0.9 Thu Nov 15 07:44:00 PST 2007
+  * fix for when no servers are definied.
+  * different buffers are now kept for different connections to
+    speed up async efforts
+  * Modified increment/decrement functions to return uint64_t values
+  * Fixed bug in cases where zero length keys were provided
+  * Thread cleanup issue in memslap
+  * No hostname lookup on reconnect
+  * Fix for flag settings (was doing hex by accident!)
+  * Support for 1.2.4 server additions "prepend" and "append" added.
+  * Added memcached_version()... not sure if I will make this public 
+    or not.
+
+0.8 Mon Nov  5 10:40:41 PST 2007
+  * Adding support for CRC hash method 
+  * Adding support for UNIX sockets
+  * Added additional HASHing methods of FNV1_64,FNV1A_64, FNV1_32, FNV1A_32
+  * Added pkgconfig support (PKG_CHECK_MODULES)
+  * Fixed conflict with defined type in MySQL
+  * Added memcached_result_st structure and functions to manipulate it.
+
+0.7 Tue Oct 30 09:24:05 PDT 2007
+  * Poved to poll() from select()
+  * Fixes in internal string class for allocation of large numbers of
+    strings.
+  * memcached_mget() function now sends keys as it parses them instead of
+    building strings as it goes.
+  * Propper flush now for making sure we get all IO sent even when in
+    non-block mode.
+  * Added --enable-debug rule for configure
+  * All asserts() removed (hey this is going into production!)
+
+
+0.6 Wed Oct 17 08:41:35 PDT 2007
+  * get value returns are now null terminated (request by Cal Heldenbrand) 
+  * Fixed connections for more hosts then two.
+  * Rewrite of the read/write IO systems to handle different sorts of host
+    failures.
+  * Added man pages for all functions and tools
+  * Raised buffer size for readinng/writing to 16K
+  * You can now optionally set the socket size for recv/send via 
+    memached_behavior_set/get.
+
+0.5 Tue Oct  9 00:22:25 PDT 2007
+ * Ruby maintainer mentioned TCP_NODELAY patch he had added. Added this to C
+   library as well. (Eric Hodel drbrain@segment7.net)
+  * Added support script for set_benchmark
+  * Updated memslap to allow testing of TCP_NODELAY
+  * Updated memslap to support --flush (aka dump memcache servers before
+    testing)
+  * Fixed bug in multiple hosts not being activated
+  * Added environmental variable MEMCACHED_SERVERS which can be used to 
+    set the servers list.
+  * fixed memcached_stat method (and now memstat works)
+  * server connect now happens on demand.
+  * Help for all command line applications
+
+0.4 Wed Oct  3 10:28:50 PDT 2007
+  * Added buffered IO to write calls for keys
+  * Added buffered IO for reads
+  * memstat was broken (bad if/else on connect)
+  * New non-blocking IO (not default yet). Mucho faster
+  * Refactor of test system.
+  * memslap crash solved
+
+0.3 Mon Oct  1 06:37:52 PDT 2007
+  * Jeff Fisher <guppy@techmonkeys.org> provided a spec file
+  * Added "make rpm" around dist file
+  * Added support for Solaris
+  * Added support for DTrace
+  * Fixed read to be recv and write to be send
+  * Bug fix where memstat would core if no server was found
+  * Added memslap tool (load generator)
+  * Numerous bug fixes in library
+  * Added calls to library for creating host lists (see
+    text cases to understand how to use this).
+
+0.2 Thu Sep 27 03:46:57 PDT 2007
+  * First public version
+