LibCurl seems to escape my POSTFIELDS

I'm using this code to post json to a server: But it seems like CURL somewhere in the way escapes the data, ie transforms it into "{"email":"test@example.se"}" (Makes my quotes escaped). I think curl still posts with the Content-Type "application/x-www-form-urlencoded", even thou I've overwritten it with application/json in my headers. How can I

LibCurl似乎逃脱了我的POSTFIELDS

我使用这段代码发布json到服务器: 但似乎CURL在某种程度上逃避了数据,即将其转换为“{”email “:”test@example.se “}”(使我的引号转义)。 我认为curl仍然使用Content-Type“application / x-www-form-urlencoded”发布,即使你在我的头文件中用application / json覆盖了它。 我怎样才能让curl不这样做? curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); curl_easy_setopt(curl, CURLOPT_POST, 1L); const std::string&a

Why does C++ not have reflection?

This is a somewhat bizarre question. My objectives are to understand the language design decision and to identify the possibilities of reflection in C++. Why C++ language committee did not go towards implementing reflection in the language? Is reflection too difficult in a language that does not run on a virtual machine (like java)? If one were to implement reflection for C++, what will be

为什么C ++没有反射?

这是一个有点奇怪的问题。 我的目标是理解语言设计决策,并确定在C ++中反思的可能性。 为什么C ++语言委员会没有去实施语言反思? 在没有运行在虚拟机上的语言(如java)中,反射太困难了? 如果有人为C ++实现反思,那么挑战是什么? 我想反射的用途是众所周知的:编辑器可以更容易编写,程序代码会更小,可以为单元测试生成模拟等等。 但是,如果您也可以评论反射的用途,那将是非常好的。 在C ++中反射有几个问题

How to perform deep copying of struct with CUDA?

This question already has an answer here: Copying a struct containing pointers to CUDA device 3 answers The short answer is "just don't". There are four reasons why I say that: There is no deep copy functionality in the API The resulting code you will have to writeto set up and copy the structure you have described to the GPU will be ridiculously complex (about 4000 API cal

如何使用CUDA执行struct的深层复制?

这个问题在这里已经有了答案: 将包含指针的结构复制到CUDA设备3个答案 简短的回答是“不要”。 我有四个理由说: API中没有深层复制功能 所得到的代码必须写入,并将所描述的结构复制到GPU中将会非常复杂(至少约4000个API调用,并且可能是您的20个Matrix的100个单元示例的中间内核) 使用三级指针间接寻址的GPU代码将大大增加内存访问延迟,并且会破坏GPU上可用的少量缓存一致性 如果您希望事后将数据复制回主机,

Is there a container facade in Boost?

I'm learning how to use iterator_facade to hide some boilerplate of iterator implementation. In my current use case I'm wrapping another container (from .NET code, actually) so I need the begin(), end(), typedefs, etc. At a minimum I want the resulting type to work with BOOST_FOREACH. Is there a convenient thing in boost to simplify that? 我会从Boost.Range库中的一个boost::iterator_rang

Boost中是否有容器外观?

我正在学习如何使用iterator_facade来隐藏迭代器实现的一些样板。 在我当前的用例中,我包装了另一个容器(实际上来自.NET代码),因此我需要begin(),end(),typedefs等。至少我希望生成的类型能够与BOOST_FOREACH一起使用。 有没有一种方便的方法来简化这一点? 我会从Boost.Range库中的一个boost::iterator_range包装一对来自给定容器的boost::iterator_range 。

OpenGL/PBO pixel drawing example needed

I need to draw pixels very fast on a screen. I found this interesting page Fast pixel drawing library author posted: "Using an OpenGL texture along with a PBO seems to be the best choice. Thanks." I guess OpenGL/PBO is what i need. I was reading about PBO here http://www.opengl.org/registry/specs/ARB/pixel_buffer_object.txt and here http://www.songho.ca/opengl/gl_pbo.html but i

需要OpenGL / PBO像素绘图示例

我需要在屏幕上非常快地绘制像素。 我发现这个有趣的页面快速像素绘图库 作者张贴:“与PBO一起使用OpenGL纹理似乎是最好的选择,谢谢。” 我猜OpenGL / PBO是我需要的。 我在这里阅读关于PBO的http://www.opengl.org/registry/specs/ARB/pixel_buffer_object.txt和这里http://www.songho.ca/opengl/gl_pbo.html,但我不明白。 .. 有人可以提供一个简单的例子,如何在带有PBO扩展的2D纹理上的位图上绘制像素? 这可能

How to make boost::serialization deserialization faster?

I use boost::serialization to save an object that contains this data : struct Container { struct SmallObject { struct CustomData { unsigned first; float second; }; std::vector<CustomData> customData; // <- i can have 1 to 4 of these in the std::vector float data1[3]; float data2[3]; float data3[2];

如何使boost :: serialization反序列化更快?

我使用boost :: serialization来保存包含这些数据的对象: struct Container { struct SmallObject { struct CustomData { unsigned first; float second; }; std::vector<CustomData> customData; // <- i can have 1 to 4 of these in the std::vector float data1[3]; float data2[3]; float data3[2]; float da

How to use Emacs and CEDET with SCons?

如何在不破坏语义和自动完成的情况下集成SCons和emacs + cedet? I don't think there exists SCons integration for cedet. However, it is easy to set up an EDE project manually. An lisp-snippet for a C++-project is given below. (ede-cpp-root-project "myProject" :name "myProject" :file "my_project.txt" :include-path '("myproject/include") :system-inclu

如何在SCons中使用Emacs和CEDET?

如何在不破坏语义和自动完成的情况下集成SCons和emacs + cedet? 我不认为cedet存在SCons集成。 但是,手动设置EDE项目很容易。 下面给出了C ++项目的lisp-snippet。 (ede-cpp-root-project "myProject" :name "myProject" :file "my_project.txt" :include-path '("myproject/include") :system-include-path '("/usr/include/c++/4.5.1" "/

How to use Boost in Visual Studio 2010

有关如何在Visual Studio 2010中的空项目中使用Boost库的一步一步的解释是什么? While Nate's answer is pretty good already, I'm going to expand on it more specifically for Visual Studio 2010 as requested, and include information on compiling in the various optional components which requires external libraries. If you are using headers only libraries, then all you need to do is to unarchive

如何在Visual Studio 2010中使用Boost

有关如何在Visual Studio 2010中的空项目中使用Boost库的一步一步的解释是什么? 虽然Nate的答案已经很不错了,但我会根据要求更加专门针对Visual Studio 2010进行扩展,并在各种可选组件中包含需要外部库的信息。 如果您只使用头文件库,那么您只需要解压缩下载并设置环境变量即可。 下面的指令仅为Visual Studio设置环境变量,而不是整个系统。 注意你只需要做一次。 将最新版本的boost(写入时为1.47.0)解压到您选择的

gstreamer add textoverlay in c++

I am trying to add a textoverlay to an mp4 movie with gstreamer-0.10. Yes I know its old but I only need to do few changes to the mp4. I know how to do it with gst-launch-0.10: gst-launch-0.10 filesrc location=input.mp4 name=src ! decodebin name=demuxer demuxer. ! queue ! textoverlay text="My Text" ! x264enc ! muxer. demuxer. ! queue ! audioconvert ! voaacenc ! muxer. m

gstreamer在c ++中添加textoverlay

我试图用gstreamer-0.10将一个textoverlay添加到mp4电影中。 是的,我知道它的老,但我只需要对mp4做一些改变。 我知道如何用gst-launch-0.10来做到这一点: gst-launch-0.10 filesrc location = input.mp4 name = src! 解码器名称= demuxer demuxer。 ! 队列! textoverlay text =“我的文字”! x264enc! 复用器。 分路器。 ! 队列! audioconvert! voaacenc! 复用器。 mp4mux name = muxer! filesink

Definitive List of Common Reasons for Segmentation Faults

NOTE: We have a lot of segfault questions, with largely the same answers, so I'm trying to collapse them into a canonical question like we have for undefined reference. Although we have a question covering what a segmentation fault is, it covers the what , but doesn't list many reasons. The top answer says "there are many reasons", and only lists one, and most of the other an

细分故障常见原因的确定清单

注意:我们有很多段错误问题,基本上都有相同的答案,所以我试图将它们折叠成像我们未定义的参考那样的规范问题。 虽然我们有一个问题涉及分段错误,但它涵盖了什么 ,但没有列出很多原因。 最上面的答案是“有很多原因”,并且只列出一个,其他大部分答案都没有列出任何原因。 总而言之,我相信我们需要一个关于这个主题的组织良好的社区wiki ,其中列出了所有常见原因(然后列出一些)以获得段错误。 目的是帮助调试,正如