diff --git a/LICENSE b/LICENSE index cf2954d..3cba0cc 100644 --- a/LICENSE +++ b/LICENSE @@ -1,22 +1,508 @@ -The MIT License (MIT) +Based on FlatDB(MIT) +--------------------------- +Copyright (C) 2018 Coder12a -Copyright (c) 2015 Peer Zeng + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. +[This is the first released version of the Lesser GPL. It also counts + as the successor of the GNU Library Public License, version 2, hence + the version number 2.1.] -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. + Preamble + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +Licenses are intended to guarantee your freedom to share and change +free software--to make sure the software is free for all its users. + + This license, the Lesser General Public License, applies to some +specially designated software packages--typically libraries--of the +Free Software Foundation and other authors who decide to use it. You +can use it too, but we suggest you first think carefully about whether +this license or the ordinary General Public License is the better +strategy to use in any particular case, based on the explanations below. + + When we speak of free software, we are referring to freedom of use, +not price. Our General Public Licenses are designed to make sure that +you have the freedom to distribute copies of free software (and charge +for this service if you wish); that you receive source code or can get +it if you want it; that you can change the software and use pieces of +it in new free programs; and that you are informed that you can do +these things. + + To protect your rights, we need to make restrictions that forbid +distributors to deny you these rights or to ask you to surrender these +rights. These restrictions translate to certain responsibilities for +you if you distribute copies of the library or if you modify it. + + For example, if you distribute copies of the library, whether gratis +or for a fee, you must give the recipients all the rights that we gave +you. You must make sure that they, too, receive or can get the source +code. If you link other code with the library, you must provide +complete object files to the recipients, so that they can relink them +with the library after making changes to the library and recompiling +it. And you must show them these terms so they know their rights. + + We protect your rights with a two-step method: (1) we copyright the +library, and (2) we offer you this license, which gives you legal +permission to copy, distribute and/or modify the library. + + To protect each distributor, we want to make it very clear that +there is no warranty for the free library. Also, if the library is +modified by someone else and passed on, the recipients should know +that what they have is not the original version, so that the original +author's reputation will not be affected by problems that might be +introduced by others. + + Finally, software patents pose a constant threat to the existence of +any free program. We wish to make sure that a company cannot +effectively restrict the users of a free program by obtaining a +restrictive license from a patent holder. Therefore, we insist that +any patent license obtained for a version of the library must be +consistent with the full freedom of use specified in this license. + + Most GNU software, including some libraries, is covered by the +ordinary GNU General Public License. This license, the GNU Lesser +General Public License, applies to certain designated libraries, and +is quite different from the ordinary General Public License. We use +this license for certain libraries in order to permit linking those +libraries into non-free programs. + + When a program is linked with a library, whether statically or using +a shared library, the combination of the two is legally speaking a +combined work, a derivative of the original library. The ordinary +General Public License therefore permits such linking only if the +entire combination fits its criteria of freedom. The Lesser General +Public License permits more lax criteria for linking other code with +the library. + + We call this license the "Lesser" General Public License because it +does Less to protect the user's freedom than the ordinary General +Public License. It also provides other free software developers Less +of an advantage over competing non-free programs. These disadvantages +are the reason we use the ordinary General Public License for many +libraries. However, the Lesser license provides advantages in certain +special circumstances. + + For example, on rare occasions, there may be a special need to +encourage the widest possible use of a certain library, so that it becomes +a de-facto standard. To achieve this, non-free programs must be +allowed to use the library. A more frequent case is that a free +library does the same job as widely used non-free libraries. In this +case, there is little to gain by limiting the free library to free +software only, so we use the Lesser General Public License. + + In other cases, permission to use a particular library in non-free +programs enables a greater number of people to use a large body of +free software. For example, permission to use the GNU C Library in +non-free programs enables many more people to use the whole GNU +operating system, as well as its variant, the GNU/Linux operating +system. + + Although the Lesser General Public License is Less protective of the +users' freedom, it does ensure that the user of a program that is +linked with the Library has the freedom and the wherewithal to run +that program using a modified version of the Library. + + The precise terms and conditions for copying, distribution and +modification follow. Pay close attention to the difference between a +"work based on the library" and a "work that uses the library". The +former contains code derived from the library, whereas the latter must +be combined with the library in order to run. + + GNU LESSER GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License Agreement applies to any software library or other +program which contains a notice placed by the copyright holder or +other authorized party saying it may be distributed under the terms of +this Lesser General Public License (also called "this License"). +Each licensee is addressed as "you". + + A "library" means a collection of software functions and/or data +prepared so as to be conveniently linked with application programs +(which use some of those functions and data) to form executables. + + The "Library", below, refers to any such software library or work +which has been distributed under these terms. A "work based on the +Library" means either the Library or any derivative work under +copyright law: that is to say, a work containing the Library or a +portion of it, either verbatim or with modifications and/or translated +straightforwardly into another language. (Hereinafter, translation is +included without limitation in the term "modification".) + + "Source code" for a work means the preferred form of the work for +making modifications to it. For a library, complete source code means +all the source code for all modules it contains, plus any associated +interface definition files, plus the scripts used to control compilation +and installation of the library. + + Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running a program using the Library is not restricted, and output from +such a program is covered only if its contents constitute a work based +on the Library (independent of the use of the Library in a tool for +writing it). Whether that is true depends on what the Library does +and what the program that uses the Library does. + + 1. You may copy and distribute verbatim copies of the Library's +complete source code as you receive it, in any medium, provided that +you conspicuously and appropriately publish on each copy an +appropriate copyright notice and disclaimer of warranty; keep intact +all the notices that refer to this License and to the absence of any +warranty; and distribute a copy of this License along with the +Library. + + You may charge a fee for the physical act of transferring a copy, +and you may at your option offer warranty protection in exchange for a +fee. + + 2. You may modify your copy or copies of the Library or any portion +of it, thus forming a work based on the Library, and copy and +distribute such modifications or work under the terms of Section 1 +above, provided that you also meet all of these conditions: + + a) The modified work must itself be a software library. + + b) You must cause the files modified to carry prominent notices + stating that you changed the files and the date of any change. + + c) You must cause the whole of the work to be licensed at no + charge to all third parties under the terms of this License. + + d) If a facility in the modified Library refers to a function or a + table of data to be supplied by an application program that uses + the facility, other than as an argument passed when the facility + is invoked, then you must make a good faith effort to ensure that, + in the event an application does not supply such function or + table, the facility still operates, and performs whatever part of + its purpose remains meaningful. + + (For example, a function in a library to compute square roots has + a purpose that is entirely well-defined independent of the + application. Therefore, Subsection 2d requires that any + application-supplied function or table used by this function must + be optional: if the application does not supply it, the square + root function must still compute square roots.) + +These requirements apply to the modified work as a whole. If +identifiable sections of that work are not derived from the Library, +and can be reasonably considered independent and separate works in +themselves, then this License, and its terms, do not apply to those +sections when you distribute them as separate works. But when you +distribute the same sections as part of a whole which is a work based +on the Library, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote +it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Library. + +In addition, mere aggregation of another work not based on the Library +with the Library (or with a work based on the Library) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + + 3. You may opt to apply the terms of the ordinary GNU General Public +License instead of this License to a given copy of the Library. To do +this, you must alter all the notices that refer to this License, so +that they refer to the ordinary GNU General Public License, version 2, +instead of to this License. (If a newer version than version 2 of the +ordinary GNU General Public License has appeared, then you can specify +that version instead if you wish.) Do not make any other change in +these notices. + + Once this change is made in a given copy, it is irreversible for +that copy, so the ordinary GNU General Public License applies to all +subsequent copies and derivative works made from that copy. + + This option is useful when you wish to copy part of the code of +the Library into a program that is not a library. + + 4. You may copy and distribute the Library (or a portion or +derivative of it, under Section 2) in object code or executable form +under the terms of Sections 1 and 2 above provided that you accompany +it with the complete corresponding machine-readable source code, which +must be distributed under the terms of Sections 1 and 2 above on a +medium customarily used for software interchange. + + If distribution of object code is made by offering access to copy +from a designated place, then offering equivalent access to copy the +source code from the same place satisfies the requirement to +distribute the source code, even though third parties are not +compelled to copy the source along with the object code. + + 5. A program that contains no derivative of any portion of the +Library, but is designed to work with the Library by being compiled or +linked with it, is called a "work that uses the Library". Such a +work, in isolation, is not a derivative work of the Library, and +therefore falls outside the scope of this License. + + However, linking a "work that uses the Library" with the Library +creates an executable that is a derivative of the Library (because it +contains portions of the Library), rather than a "work that uses the +library". The executable is therefore covered by this License. +Section 6 states terms for distribution of such executables. + + When a "work that uses the Library" uses material from a header file +that is part of the Library, the object code for the work may be a +derivative work of the Library even though the source code is not. +Whether this is true is especially significant if the work can be +linked without the Library, or if the work is itself a library. The +threshold for this to be true is not precisely defined by law. + + If such an object file uses only numerical parameters, data +structure layouts and accessors, and small macros and small inline +functions (ten lines or less in length), then the use of the object +file is unrestricted, regardless of whether it is legally a derivative +work. (Executables containing this object code plus portions of the +Library will still fall under Section 6.) + + Otherwise, if the work is a derivative of the Library, you may +distribute the object code for the work under the terms of Section 6. +Any executables containing that work also fall under Section 6, +whether or not they are linked directly with the Library itself. + + 6. As an exception to the Sections above, you may also combine or +link a "work that uses the Library" with the Library to produce a +work containing portions of the Library, and distribute that work +under terms of your choice, provided that the terms permit +modification of the work for the customer's own use and reverse +engineering for debugging such modifications. + + You must give prominent notice with each copy of the work that the +Library is used in it and that the Library and its use are covered by +this License. You must supply a copy of this License. If the work +during execution displays copyright notices, you must include the +copyright notice for the Library among them, as well as a reference +directing the user to the copy of this License. Also, you must do one +of these things: + + a) Accompany the work with the complete corresponding + machine-readable source code for the Library including whatever + changes were used in the work (which must be distributed under + Sections 1 and 2 above); and, if the work is an executable linked + with the Library, with the complete machine-readable "work that + uses the Library", as object code and/or source code, so that the + user can modify the Library and then relink to produce a modified + executable containing the modified Library. (It is understood + that the user who changes the contents of definitions files in the + Library will not necessarily be able to recompile the application + to use the modified definitions.) + + b) Use a suitable shared library mechanism for linking with the + Library. A suitable mechanism is one that (1) uses at run time a + copy of the library already present on the user's computer system, + rather than copying library functions into the executable, and (2) + will operate properly with a modified version of the library, if + the user installs one, as long as the modified version is + interface-compatible with the version that the work was made with. + + c) Accompany the work with a written offer, valid for at + least three years, to give the same user the materials + specified in Subsection 6a, above, for a charge no more + than the cost of performing this distribution. + + d) If distribution of the work is made by offering access to copy + from a designated place, offer equivalent access to copy the above + specified materials from the same place. + + e) Verify that the user has already received a copy of these + materials or that you have already sent this user a copy. + + For an executable, the required form of the "work that uses the +Library" must include any data and utility programs needed for +reproducing the executable from it. However, as a special exception, +the materials to be distributed need not include anything that is +normally distributed (in either source or binary form) with the major +components (compiler, kernel, and so on) of the operating system on +which the executable runs, unless that component itself accompanies +the executable. + + It may happen that this requirement contradicts the license +restrictions of other proprietary libraries that do not normally +accompany the operating system. Such a contradiction means you cannot +use both them and the Library together in an executable that you +distribute. + + 7. You may place library facilities that are a work based on the +Library side-by-side in a single library together with other library +facilities not covered by this License, and distribute such a combined +library, provided that the separate distribution of the work based on +the Library and of the other library facilities is otherwise +permitted, and provided that you do these two things: + + a) Accompany the combined library with a copy of the same work + based on the Library, uncombined with any other library + facilities. This must be distributed under the terms of the + Sections above. + + b) Give prominent notice with the combined library of the fact + that part of it is a work based on the Library, and explaining + where to find the accompanying uncombined form of the same work. + + 8. You may not copy, modify, sublicense, link with, or distribute +the Library except as expressly provided under this License. Any +attempt otherwise to copy, modify, sublicense, link with, or +distribute the Library is void, and will automatically terminate your +rights under this License. However, parties who have received copies, +or rights, from you under this License will not have their licenses +terminated so long as such parties remain in full compliance. + + 9. You are not required to accept this License, since you have not +signed it. However, nothing else grants you permission to modify or +distribute the Library or its derivative works. These actions are +prohibited by law if you do not accept this License. Therefore, by +modifying or distributing the Library (or any work based on the +Library), you indicate your acceptance of this License to do so, and +all its terms and conditions for copying, distributing or modifying +the Library or works based on it. + + 10. Each time you redistribute the Library (or any work based on the +Library), the recipient automatically receives a license from the +original licensor to copy, distribute, link with or modify the Library +subject to these terms and conditions. You may not impose any further +restrictions on the recipients' exercise of the rights granted herein. +You are not responsible for enforcing compliance by third parties with +this License. + + 11. If, as a consequence of a court judgment or allegation of patent +infringement or for any other reason (not limited to patent issues), +conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot +distribute so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you +may not distribute the Library at all. For example, if a patent +license would not permit royalty-free redistribution of the Library by +all those who receive copies directly or indirectly through you, then +the only way you could satisfy both it and this License would be to +refrain entirely from distribution of the Library. + +If any portion of this section is held invalid or unenforceable under any +particular circumstance, the balance of the section is intended to apply, +and the section as a whole is intended to apply in other circumstances. + +It is not the purpose of this section to induce you to infringe any +patents or other property right claims or to contest validity of any +such claims; this section has the sole purpose of protecting the +integrity of the free software distribution system which is +implemented by public license practices. Many people have made +generous contributions to the wide range of software distributed +through that system in reliance on consistent application of that +system; it is up to the author/donor to decide if he or she is willing +to distribute software through any other system and a licensee cannot +impose that choice. + +This section is intended to make thoroughly clear what is believed to +be a consequence of the rest of this License. + + 12. If the distribution and/or use of the Library is restricted in +certain countries either by patents or by copyrighted interfaces, the +original copyright holder who places the Library under this License may add +an explicit geographical distribution limitation excluding those countries, +so that distribution is permitted only in or among countries not thus +excluded. In such case, this License incorporates the limitation as if +written in the body of this License. + + 13. The Free Software Foundation may publish revised and/or new +versions of the Lesser General Public License from time to time. +Such new versions will be similar in spirit to the present version, +but may differ in detail to address new problems or concerns. + +Each version is given a distinguishing version number. If the Library +specifies a version number of this License which applies to it and +"any later version", you have the option of following the terms and +conditions either of that version or of any later version published by +the Free Software Foundation. If the Library does not specify a +license version number, you may choose any version ever published by +the Free Software Foundation. + + 14. If you wish to incorporate parts of the Library into other free +programs whose distribution conditions are incompatible with these, +write to the author to ask for permission. For software which is +copyrighted by the Free Software Foundation, write to the Free +Software Foundation; we sometimes make exceptions for this. Our +decision will be guided by the two goals of preserving the free status +of all derivatives of our free software and of promoting the sharing +and reuse of software generally. + + NO WARRANTY + + 15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO +WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. +EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR +OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY +KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE +LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME +THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + + 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN +WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY +AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU +FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR +CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE +LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING +RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A +FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF +SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH +DAMAGES. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Libraries + + If you develop a new library, and you want it to be of the greatest +possible use to the public, we recommend making it free software that +everyone can redistribute and change. You can do so by permitting +redistribution under these terms (or, alternatively, under the terms of the +ordinary General Public License). + + To apply these terms, attach the following notices to the library. It is +safest to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least the +"copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 + USA + +Also add information on how to contact you by electronic and paper mail. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the library, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the + library `Frob' (a library for tweaking knobs) written by James Random + Hacker. + + , 1 April 1990 + Ty Coon, President of Vice + +That's all there is to it! \ No newline at end of file diff --git a/README-zh.md b/README-zh.md deleted file mode 100644 index 60c898f..0000000 --- a/README-zh.md +++ /dev/null @@ -1,163 +0,0 @@ -FlatDB -=========== - -FlatDB是一个Lua扩展库，实现一个无服务器的零配置的NoSQL数据引擎。
-它提供一个由Lua表构成的键值对存储系统。 - -FlatDB的使用情境 -=========== - -当您想使用SQLite存储一些数据，而不必用到SQL查询的时候，可以考虑使用FlatDB代替之。
-如果您的程序使用的语言恰好是Lua，或者嵌入了Lua作为扩展脚本的话，那么就尝试使用FlatDB来存储数据吧。 - -概念 -========== - -| FlatDB | 磁盘 | Lua | -|:--------------:|:------------:|:----------:| -| 数据库 | 目录 | 表 | -| 页（Page） | 文件 | 表 | -| 键值对 | 文件内容 | 键值对 | - -该表反映的是FlatDB、磁盘和Lua三个层面的对应关系。
-FlatDB将一个目录看作数据库，映射到一个Lua表上。 -该Lua表的下级也是一些Lua表，对应FlatDB的页（Page），它将被存储到数据库目录下同名的文件中。 -这些文件的内容正是页（Page）中的键值对，即Lua表序列化后的字符串。 -键值对中的键和值可以是Lua中所有能够被序列化的类型，即除了协程、用户数据、C数据和C函数外的类型。 - -用法 -========== - -将*flatdb.lua*文件复制到你的项目所在或存储Lua扩展库的目录中。
-然后在用到它的Lua文件中写上这句话： -```lua -local flatdb = require 'flatdb' -``` - -1. 将目录作为数据库映射到Lua表中 - - ```lua - local db = flatdb('./db') - ``` - -2. 打开或创建一个页（Page） - - ```lua - if not db.page then - db.page = {} - end - ``` - -3. 往页（Page）中写入键值对数据 - - ```lua - db.page.key = 'value' - -- equivalent to db.page['key'] = 'value' - ``` - -4. 读取页（Page）中的数据 - - ```lua - print(db.page.key) -- prints 'value' - ``` - -5. 将所有页（Page）数据保存在同名的文件中 - - ```lua - db:save() - -- 'page' will be saved to './db/page' - ``` - -更多用法可参考另一个项目[Ledis](https://github.com/uleelx/ledis)（一个使用FlatDB作为存储后端的Redis实现）。 - -范例概览 -========== - -```lua --- 这是一个以FlatDB作为存储引擎的日志系统例子 - -local flatdb = require("flatdb") - -local logger = flatdb("./log") - -local count = 0 - -local function common_log(logger, level, message) - local today = os.date("%Y-%m-%d") - if logger[today] == nil then logger[today] = {} end - if logger[today][level] == nil then logger[today][level] = {} end - table.insert(logger[today][level], { - timestamp = os.time(), - level = level, - message = message - }) - count = (count+1)%10 - if count == 0 then - logger:save() - end -end - -local levels = {"debug", "info", "warn", "error", "fatal"} - -for _, level in ipairs(levels) do - flatdb.hack[level] = function(logger, msg) - common_log(logger, level, msg) - end -end - -flatdb.hack.find = function(logger, level, date) - if logger[date or os.date("%Y-%m-%d")] then - return logger[date or os.date("%Y-%m-%d")][level] - end -end - -for i = 1, 10 do - logger:debug("This is a debug message.") - logger:info("This is an info message.") - logger:warn("This is a warn message.") - logger:error("This is an error message.") - logger:fatal("This is a fatal message.") -end - -local pp = require("pp") -- https://github.com/luapower/pp -pp(logger:find("error")) - -``` - -API -========== - -- **函数** - - - **flatdb(dir) --> db** - - 将一个目录dir映射成数据库对象。若目录不存在，返回nil。否则，返回一个数据库对象db（Lua表）。 - - - **db:save([page])** - - 将指定的页（Page）保存在文件中，若不指定则保存数据库对象中所有的页。参数*page*是指页的名称。 - -- **表** - - - **flatdb** - - 当数据库载入后，flatdb表的键值对有以下关系： - - *flatdb[dir] --> db* - - *flatdb[db] --> dir* - - - **flatdb.hack** - - hack表包含了数据库对象的所有方法。默认情况下，目前数据库对象只有一个db:save([page])方法。 - 该表一般用于扩展数据库对象方法。 - -依赖项 -======= - -- [lua-MessagePack](https://github.com/fperrad/lua-MessagePack) - -许可证 -======= - -FlatDB是在MIT许可证下发布的。 diff --git a/README.md b/README.md index de2dd6f..69529bd 100644 --- a/README.md +++ b/README.md @@ -1,159 +1,4 @@ -FlatDB -=========== - -FlatDB is a lua library that implements a serverless, zero-configuration, NoSQL database engine.
-It provides a key-value storage system using plain Lua tables. - -When To Use FlatDB -=========== - -When you want to use SQLite to store data, just take a glance at FlatDB.
-When Lua acts in your program as the major language or the embedded scripting language, just try using FlatDB. - -Concept -========== - -| FlatDB | Disk | Lua | -|:--------------:|:-------------:|:--------------:| -| Database | Directory | Table | -| Page | File | Table | -| Key-value pair | File content | Key-value pair | - -Keys and values can be all Lua types except coroutines, userdata, cdata and C functions. - -Usage -========== - -Copy *flatdb.lua* file to your project or where your lua libraries stored.
-Then write this in any Lua file where you want to use it: -```lua -local flatdb = require 'flatdb' -``` - -1. Bind a directory as a database - - ```lua - local db = flatdb('./db') - ``` - -2. Open or create a page - - ```lua - if not db.page then - db.page = {} - end - ``` - -3. Store key-value items - - ```lua - db.page.key = 'value' - -- equivalent to db.page['key'] = 'value' - ``` - -4. Retrieve items - - ```lua - print(db.page.key) -- prints 'value' - ``` - -5. Save to file - - ```lua - db:save() - -- 'page' will be saved to './db/page' - ``` - -More usage can be found in the [Ledis](https://github.com/uleelx/ledis)(an alternative of Redis server using FlatDB). - -Quick Look -========== - -```lua --- This is an logging system example using FlatDB - -local flatdb = require("flatdb") - -local logger = flatdb("./log") - -local count = 0 - -local function common_log(logger, level, message) - local today = os.date("%Y-%m-%d") - if logger[today] == nil then logger[today] = {} end - if logger[today][level] == nil then logger[today][level] = {} end - table.insert(logger[today][level], { - timestamp = os.time(), - level = level, - message = message - }) - count = (count+1)%10 - if count == 0 then - logger:save() - end -end - -local levels = {"debug", "info", "warn", "error", "fatal"} - -for _, level in ipairs(levels) do - flatdb.hack[level] = function(logger, msg) - common_log(logger, level, msg) - end -end - -flatdb.hack.find = function(logger, level, date) - if logger[date or os.date("%Y-%m-%d")] then - return logger[date or os.date("%Y-%m-%d")][level] - end -end - -for i = 1, 10 do - logger:debug("This is a debug message.") - logger:info("This is an info message.") - logger:warn("This is a warn message.") - logger:error("This is an error message.") - logger:fatal("This is a fatal message.") -end - -local pp = require("pp") -- https://github.com/luapower/pp -pp(logger:find("error")) - -``` - -API -========== - -- **Functions** - - - **flatdb(dir) --> db** - - Bind a directory as a database, returns nil if 'dir' doesn't exists. Otherwise, it returns a 'db' obeject. - - - **db:save([page])** - - Save all pages or the given page(if specified) contained in db to file. The 'page' argument is a string, the page's name. - -- **Tables** - - - **flatdb** - - When a db is loaded, there is two relations below: - - *flatdb[dir] --> db* - - *flatdb[db] --> dir* - - - **flatdb.hack** - - The 'hack' table contains db's methods. There is only one method 'save(db, page)' in it by default. - It is usually used to extend db methods. - -Dependencies -======= - -- [lua-MessagePack](https://github.com/fperrad/lua-MessagePack) - -License -======= - -FlatDB is distributed under the MIT license. +ColdDB +=========== + +ColdDB is a lua library that implements a serverless, zero-configuration, NoSQL database engine. \ No newline at end of file diff --git a/colddb.lua b/colddb.lua new file mode 100644 index 0000000..e1b1db9 --- /dev/null +++ b/colddb.lua @@ -0,0 +1,629 @@ +colddb = {} + +local ie = ... + +local function createDir(directory) + return minetest.mkdir(directory) +end + +function colddb.file_Exists(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local f = io.open(string.format("%s%s%s.cold",db.directory,t,name),"r") + if f ~= nil then + io.close(f) + return true + else + return false + end + return false +end + +function colddb.get_db(directory) + local directory = string.format("%s/%s",minetest.get_worldpath(),directory) + if not createDir(directory) then + error(string.format("%s is not a directory.",directory)) + end + db = { + global_tag = "", + directory = directory, + tags = {}, + mem_pool = {}, + indexes_pool = {}, + iterate_queue = {}, + indexes = false, + add_to_mem_pool = true, + } + return db +end + +function colddb.add_global_tag(db,tag) + local t = "" + if type(tag) == "table" then + for index in pairs(tag) do + t = string.format("%s%s/",t,index) + end + else + t = string.format("%s/",tag) + end + db.global_tag = string.format("%s%s",db.global_tag,t) + db.directory = string.format("%s/%s",db.directory,t) + if not createDir(db.directory) then + error(string.format("%s is not a directory.",db.directory)) + end +end + +function colddb.add_tag(db,name,tag) + local t = "" + if not db.tags[name] then + db.tags[name] = "" + end + if type(tag) == "table" then + for _index in pairs(tag) do + t = string.format("%s%s/",t,_index) + end + else + t = string.format("%s/",tag) + end + local test_path = string.format("%s%s%s",db.directory,db.tags[name],t) + if not createDir(test_path) then + error(string.format("%s is not a directory.",test_path)) + end + db.tags[name] = string.format("%s%s",db.tags[name],t) +end + +function colddb.get_tag(db,name) + if not name then + return "" + end + local tag = db.tags[name] + if tag then + return tag + end + return "" +end + +function colddb.remove_tag(db,name) + if db.tags[name] then + local delete_path = string.format("%s%s",db.directory,db.tags[name]) + local wc = delete_path:len() + delete_path = delete_path:sub(0,wc-1) + db.tags[name] = nil + local err,msg = os.remove(delete_path) + if err == nil and ie then + assert(ie, "Please add colddb to secure.trusted_mods in the settings") + local cmd = string.format("rmdir %s",delete_path) + ie.os.execute(cmd) + cmd = nil + end + end +end + +function colddb.delete_file(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local text = string.format("%s%s%s.cold",db.directory,t,name) + + local err,msg = os.remove(text) + if err == nil then + print(string.format("error removing db data %s error message: %s",text,msg)) + end +end + +function colddb.load_table(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local f = io.open(string.format("%s%s%s.cold",db.directory,t,name), "r") + if f then + local data = minetest.deserialize(f:read("*a")) + f:close() + return data + end + return nil +end + +function colddb.save_table(db,name, _table,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + return minetest.safe_file_write(string.format("%s%s%s.cold",db.directory,t,name), minetest.serialize(_table)) +end + +function colddb.save_key(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + return minetest.safe_file_write(string.format("%s%s%s.cold",db.directory,t,name), "") +end + +function colddb.load_key(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local f = io.open(string.format("%s%s%s.cold",db.directory,t,name), "r") + if f then + f:close() + return true + end + return false +end + +function colddb.delete_index_table(db,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local p = string.format("%s%sæIndex_table.cold",db.directory,t) + if colddb.file_Exists(db,name,tag_name) then + local err,msg = os.remove(p) + if err == nil then + print(string.format("error removing db data %s error message: %s",p,msg)) + end + return true + end + return false +end + +local function delete_lines_func_begin(args) + local f = io.open(args.copyfile, "w") + local db = args.db + local cs = args.cs + if f then + args.file = f + args.removedlist = {} + return args + end + return false +end + +local function delete_lines_func_i(line,i,args) + local f = args.file + local db = args.db + local cs = args.cs + local om = db.indexes_pool[args.cs] + if om and not om.deleted_items[line] then + f:write(string.format("\n%s",line)) + else + args.count = args.count - 1 + args.removedlist[line] = true + end +end + +local function delete_lines_func_end(args) + local db = args.db + local cs = args.cs + if db.indexes_pool[cs] or db.indexes_pool[cs].file then + db.indexes_pool[cs].file:close() + db.indexes_pool[cs].file = nil + args.file:seek("set") + args.file:write(string.format("%i",args.count)) + args.file:close() + os.remove(args.oldfile) + os.rename(args.copyfile, args.oldfile) + for i,l in pairs(args.removedlist) do + db.indexes_pool[cs].deleted_items[i] = nil + end + db.indexes_pool[cs].deleting = false + end + args = nil +end + +function colddb.delete_lines(db,_lines,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local f = db.indexes_pool[cs] + local k = type(_lines) + if k == "string" then + f.deleted_items[_lines] = true + else + for i,l in pairs(_lines) do + f.deleted_items[i] = true + end + end + if not db.indexes_pool[cs].deleting then + db.indexes_pool[cs].deleting = false + end + if f and f.file and not db.indexes_pool[cs].deleting then + db.indexes_pool[cs].deleting = true + if db.indexes_pool[cs].needs_flushing == true then + f.file:flush() + db.indexes_pool[cs].needs_flushing = false + end + local oldfile = string.format("%s%sæIndex_table.cold",db.directory,t) + local copyfile = string.format("%s%sæIndex_table.cold.replacer",db.directory,t) + local args = {db=db,cs=cs,oldfile=oldfile,copyfile=copyfile,do_not_skip_removed_items=true} + db.indexes_pool[cs] = f + colddb.iterate_index_table(db,delete_lines_func_begin,delete_lines_func_i,delete_lines_func_end,150,args,tag_name) + end +end + +function colddb.create_index_table(db,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local p = string.format("%s%sæIndex_table.cold",db.directory,t) + if not colddb.file_Exists(db,name,tag_name) then + local f = io.open(p, "w") + if f then + f:seek("set") + f:write("0") + f:close() + end + end + local f = io.open(p, "r+") + if f then + f:seek("set") + f:write("0") + db.indexes_pool[string.format("%s%s",t,name)] = {file = f,needs_flushing = false,deleted_items = {},iterating = false,inuse = false} + return true + end + return false +end + +function colddb.open_index_table(db,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local fs = db.indexes_pool[cs] + if not fs then + local p = string.format("%s%sæIndex_table.cold",db.directory,t) + if not colddb.file_Exists(db,name,tag_name) then + local f = io.open(p, "w") + if f then + f:seek("set") + f:write("0") + f:close() + end + end + local f = io.open(p, "r+") + if f then + db.indexes_pool[cs] = {file = f,needs_flushing = false,deleted_items = {},iterating = false,inuse = true} + return f + end + return nil + else + return fs.file + end + return nil +end + +function colddb.append_index_table(db,key,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local f = db.indexes_pool[cs] + local k = type(key) + if f and f.file and k == "string" then + local fl = f.file + if f.needs_flushing == true then + fl:flush() + end + db.indexes_pool[cs].needs_flushing = true + db.indexes_pool[cs].inuse = true + fl:seek("end") + fl:write(string.format("\n%s",key)) + fl:seek("set") + local count = tonumber(fl:read("*l")) + count = count + 1 + fl:seek("set") + fl:write(string.format("%i",count)) + elseif f and f.file then + local fl = f.file + if f.needs_flushing == true then + fl:flush() + end + db.indexes_pool[cs].needs_flushing = true + db.indexes_pool[cs].inuse = true + local c = 0 + for i in pairs(key) do + fl:seek("end") + fl:write(string.format("\n%s",i)) + c = c + 1 + end + fl:seek("set") + local count = tonumber(fl:read("*l")) + count = count + c + fl:seek("set") + fl:write(string.format("%i",count)) + else + return false + end +end + +function colddb.get_count(db,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local f = db.indexes_pool[cs] + if f and f.file then + local fl = f.file + if f.needs_flushing == true then + fl:flush() + f.needs_flushing = true + end + fl:seek("set") + local count = tonumber(fl:read("*l")) + db.indexes_pool[cs].inuse = true + return count + end + return nil +end + +local function iterate(db,func_on_iterate,end_func,cycles_per_tick,count,cs,args) + local f = db.indexes_pool[cs] + f.inuse = true + local fl = f.file + for i=1,cycles_per_tick do + if count < 1 then + break + end + local line = fl:read("*l") + if args.do_not_skip_removed_items or not db.indexes_pool[cs].deleted_items[line] then + func_on_iterate(line,i,args) + end + count = count - 1 + end + db.indexes_pool[cs] = f + if count < 1 then + if end_func then + end_func(args) + end + if db.iterate_queue[cs] and db.iterate_queue[cs][1] then + local copy = db.iterate_queue[cs][1] + if copy.begin_func then + local a = copy.begin_func(copy.args) + if a and type(a) == "table" then + copy.args = a + end + end + minetest.after(0,iterate,copy.db,copy.func_on_iterate,copy.end_func,copy.cycles_per_tick,copy.count,copy.cs,copy.args) + table.remove(db.iterate_queue[cs],1) + return true + else + db.iterate_queue[cs] = nil + end + db.indexes_pool[cs].iterating = false + return true + end + minetest.after(0,iterate,db,func_on_iterate,end_func,cycles_per_tick,count,cs,args) +end + +function colddb.iterate_index_table(db,begin_func,func_on_iterate,end_func,cycles_per_tick,args,tag_name) + local t = "" + local name = "æIndex_table" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local f = db.indexes_pool[cs] + if not f or not f.file then + colddb.open_index_table(db,tag_name) + f = db.indexes_pool[cs] + end + if f and f.file and db.indexes_pool[cs].iterating == false then + -- set inuse and iterating to true + db.indexes_pool[cs].inuse = true + db.indexes_pool[cs].iterating = true + local fl = f.file + if f.needs_flushing == true then + fl:flush() + f.needs_flushing = true + end + -- Get count + fl:seek("set") + local c = tonumber(fl:read("*l")) + if c < 1 then + -- If theres nothing to index then return + return false + end + if not args then + args = {} + end + args.count = c + -- Run the begin function + if begin_func then + local a = begin_func(args) + if a and type(a) == "table" then + args = a + end + end + -- Start iterating the index table + iterate(db,func_on_iterate,end_func,cycles_per_tick,c,cs,args) + elseif f and f.file then + -- If its iterating some other function then add this one to the queue list + fl:seek("set") + local c = tonumber(fl:read("*l")) + if c < 1 then + -- If theres nothing to index then return + return false + end + if not db.iterate_queue[cs] then + db.iterate_queue[cs] = {} + end + local _table = {db=db,begin_func=begin_func,func_on_iterate=func_on_iterate,end_func=end_func,cycles_per_tick=cycles_per_tick,count=c,cs=cs,tag_name=tag_name,args=args} + table.insert(db.iterate_queue[cs],_table) + end +end + +local function check_use(db,name,tag_name,d) + if not d then + d = 0 + end + local delay = 30 + d + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + if not db.mem_pool or not db.mem_pool[cs] then + return false + end + if db.mem_pool[cs].inuse == false then + if db.mem_pool[cs].indexes == true then + local cs2 = string.format("%s%s",t,"æIndex_table") + local fs = db.indexes_pool[cs2] + if fs and fs.file then + if fs.inuse == true or fs.iterating == true then + db.indexes_pool[cs2].inuse = false + minetest.after(delay,check_use,name,tag_name,delay,d) + return false + else + fs.file:close() + db.indexes_pool[cs2] = nil + end + end + end + db.mem_pool[cs] = nil + else + db.mem_pool[cs].inuse = false + minetest.after(delay,check_use,name,tag_name,delay,d) + return false + end +end + +local function load_into_mem(db,name,_table,tag_name) + if db.add_to_mem_pool then + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + if not db.mem_pool[cs] then + db.mem_pool[cs] = {mem = {},inuse = false,check_timer = false,indexes = db.indexes} + end + db.mem_pool[cs].mem = _table + if not db.mem_pool[cs].check_timer then + db.mem_pool[cs].inuse = false + db.mem_pool[cs].indexes = db.indexes + db.mem_pool[cs].check_timer = true + check_use(db,name,tag_name) + end + end +end + +function colddb.set(db,name,_table,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + if db.indexes and not colddb.file_Exists(db,name,tag_name) then + local cs2 = string.format("%s%s",t,"æIndex_table") + local om = db.indexes_pool[cs2] + if not colddb.file_Exists(db,"æIndex_table",tag_name) or not (om and om.file) then + colddb.open_index_table(db,tag_name) + end + minetest.after(0,function(db,name,tag_name)colddb.append_index_table(db,name,tag_name)end,db,name,tag_name) + end + minetest.after(1,function(db,name, _table,tag_name)colddb.save_table(db,name, _table,tag_name)end,db,name, _table,tag_name) + local cs = string.format("%s%s",t,name) + if db.add_to_mem_pool and not (db.mem_pool or db.mem_pool[cs]) then + db.mem_pool[cs] = {mem = {},inuse = false,check_timer = false,indexes = db.indexes} + load_into_mem(db,name,_table,tag_name) + end +end + +function colddb.set_key(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + if db.indexes and not colddb.file_Exists(db,name,tag_name) then + local cs2 = string.format("%s%s",t,"æIndex_table") + local om = db.indexes_pool[cs2] + if not colddb.file_Exists(db,"æIndex_table",tag_name) or not (om and om.file) then + colddb.open_index_table(db,tag_name) + end + minetest.after(0,function(db,name,tag_name)colddb.append_index_table(db,name,tag_name)end,db,name,tag_name) + end + minetest.after(1,function(db,name, tag_name)colddb.save_key(db,name, tag_name)end,db,name, tag_name) + local cs = string.format("%s%s",t,name) + if db.add_to_mem_pool and not (db.mem_pool or db.mem_pool[cs]) then + db.mem_pool[cs] = {mem = {},inuse = false,check_timer = false,indexes = db.indexes} + load_into_mem(db,name,_table,tag_name) + end +end + +function colddb.get(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local pm = db.mem_pool[cs] + if pm then + db.mem_pool[cs].inuse = true + return pm.mem + else + local _table = colddb.load_table(db,name,tag_name) + if _table then + load_into_mem(db,name,_table,tag_name) + return _table + end + end + return nil +end + +function colddb.get_key(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + local pm = db.mem_pool[cs] + if pm then + db.mem_pool[cs].inuse = true + return true + else + local bool = colddb.load_key(db,name,tag_name) + if bool then + load_into_mem(db,name,bool,tag_name) + return bool + end + end + return nil +end + +function colddb.remove(db,name,tag_name) + local t = "" + if tag_name then + t = colddb.get_tag(db,tag_name) + end + local cs = string.format("%s%s",t,name) + if db.mem_pool and db.mem_pool[cs] then + db.mem_pool[cs] = nil + end + if db.indexes and colddb.file_Exists(db,"æIndex_table",tag_name) then + local cs2 = string.format("%s%s",t,"æIndex_table") + local om = db.indexes_pool[cs2] + if not om and not om.file then + colddb.open_index_table(db,tag_name) + end + colddb.delete_lines(db,name,tag_name) + end + minetest.after(0,function(db,name,tag_name)colddb.delete_file(db,name,tag_name)end,db,name,tag_name) +end \ No newline at end of file diff --git a/db/.gitignore b/db/.gitignore deleted file mode 100644 index 5e7d273..0000000 --- a/db/.gitignore +++ /dev/null @@ -1,4 +0,0 @@ -# Ignore everything in this directory -* -# Except this file -!.gitignore diff --git a/depends.txt b/depends.txt new file mode 100644 index 0000000..e69de29 diff --git a/description.txt b/description.txt new file mode 100644 index 0000000..9934151 --- /dev/null +++ b/description.txt @@ -0,0 +1 @@ +pure lua No-sql database mod. \ No newline at end of file diff --git a/flatdb.lua b/flatdb.lua deleted file mode 100644 index 60916f5..0000000 --- a/flatdb.lua +++ /dev/null @@ -1,86 +0,0 @@ -local mp = require("MessagePack") - -local function isFile(path) - local f = io.open(path, "r") - if f then - f:close() - return true - end - return false -end - -local function isDir(path) - path = string.gsub(path.."/", "//", "/") - local ok, err, code = os.rename(path, path) - if ok or code == 13 then - return true - end - return false -end - -local function load_page(path) - local ret - local f = io.open(path, "rb") - if f then - ret = mp.unpack(f:read("*a")) - f:close() - end - return ret -end - -local function store_page(path, page) - if type(page) == "table" then - local f = io.open(path, "wb") - if f then - f:write(mp.pack(page)) - f:close() - return true - end - end - return false -end - -local pool = {} - -local db_funcs = { - save = function(db, p) - if p then - if type(p) == "string" and type(db[p]) == "table" then - return store_page(pool[db].."/"..p, db[p]) - else - return false - end - end - for p, page in pairs(db) do - if not store_page(pool[db].."/"..p, page) then - return false - end - end - return true - end -} - -local mt = { - __index = function(db, k) - if db_funcs[k] then return db_funcs[k] end - if isFile(pool[db].."/"..k) then - db[k] = load_page(pool[db].."/"..k) - end - return rawget(db, k) - end -} - -pool.hack = db_funcs - -return setmetatable(pool, { - __mode = "kv", - __call = function(pool, path) - assert(isDir(path), path.." is not a directory.") - if pool[path] then return pool[path] end - local db = {} - setmetatable(db, mt) - pool[path] = db - pool[db] = path - return db - end -}) diff --git a/init.lua b/init.lua new file mode 100644 index 0000000..bc7e835 --- /dev/null +++ b/init.lua @@ -0,0 +1,8 @@ +modpath = minetest.get_modpath("colddb") + +local ie = minetest.request_insecure_environment() +if ie then + loadfile(modpath .. "/colddb.lua")(ie) +else + dofile(modpath .. "/colddb.lua") +end \ No newline at end of file diff --git a/mod.conf b/mod.conf new file mode 100644 index 0000000..6c7c4a7 --- /dev/null +++ b/mod.conf @@ -0,0 +1 @@ +name = colddb \ No newline at end of file