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POHow to hide helper functions from public API in c
 

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    <p>I'm working on a project and I need to create an API. I am using sockets to communicate between the server (my application) and the clients (the other applications using my API). </p> <p>This project is in c not C++</p> <p>I come from a linux background and this is my first project using Windows, Visual Studio 2008, and dll libraries. </p> <p>I have communication working between the client and server, but I have some that is duplicated on both projects. I would like to create a library (probably a dll file), that both projects can link to so I don't have to maintain extra code. </p> <p>I also have to create the library that has the API that I need to make available for my clients. Within the API functions that I want public are the calls to these helper functions that are "duplicated code", I don't want to expose these functions to my client, but I do want my server to be able to use those functions. How can I do this?</p> <p>I will try to clarify with an example. This is what I started with.</p> <p>Server Project:</p> <pre><code>int Server_GetPacket(SOCKET sd); int ReceiveAll(SOCKET sd, char *buf, int len); int VerifyLen(char *buf); </code></pre> <p>Client Project:</p> <pre><code>int Client_SendCommand(int command); int Client_GetData(int command, char *buf, int len); int ReceiveAll(SOCKET sd, char *buf, int len); int VerifyLen(char *buf); </code></pre> <p>This is kind of what I would like to end up with:</p> <pre><code>//Server Project: int Server_GetPacket(SOCKET sd); // library with public and private types // private API (not exposed to my client) int ReceiveAll(SOCKET sd, char *buf, int len); int VerifyLen(char *buf); // public API (header file available for client) int Client_SendCommand(int command); int Client_GetData(int command, char *buf, int len); </code></pre> <p>Thanks any help would be appreciated.</p>
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