assimp.assimp/port/dAssimp/assimp/fileIO.d

/*
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Open Asset Import Library (ASSIMP)
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*/

/**
 * The data structures necessary to use Assimip with a custom IO system.
 */
module assimp.fileIO;

import assimp.types;

extern ( C ) {
   // aiFile callbacks
   alias size_t function( aiFile*, char*, size_t, size_t ) aiFileWriteProc;
   alias size_t function(  aiFile*, char*, size_t, size_t ) aiFileReadProc;
   alias size_t function( aiFile* ) aiFileTellProc;
   alias void function( aiFile* ) aiFileFlushProc;
   alias aiReturn function( aiFile*, size_t, aiOrigin ) aiFileSeek;

   // aiFileIO callbacks
   alias aiFile* function( aiFileIO*, char*, char* ) aiFileOpenProc;
   alias void function( aiFileIO*,  aiFile* ) aiFileCloseProc;

   /**
    * Represents user-defined data.
    */
   alias char* aiUserData;

   /**
    * File system callbacks.
    *
    * Provided are functions to open and close files. Supply a custom structure
    * to the import function. If you don't, a default implementation is used.
    * Use custom file systems to enable reading from other sources, such as
    * ZIPs or memory locations.
    */
   struct aiFileIO {
      /**
       * Function used to open a new file
       */
      aiFileOpenProc OpenProc;

      /**
       * Function used to close an existing file
       */
      aiFileCloseProc CloseProc;

      /**
       * User-defined, opaque data.
       */
      aiUserData UserData;
   }

   /**
    * File callbacks.
    *
    * Actually, it's a data structure to wrap a set of <code>fXXXX</code>
    * (e.g <code>fopen()</code>) replacement functions.
    *
    * The default implementation of the functions utilizes the <code>fXXX</code>
    * functions from the CRT. However, you can supply a custom implementation
    * to Assimp by passing a custom <code>aiFileIO</code>. Use this to enable
    * reading from other sources such as ZIP archives or memory locations.
    */
   struct aiFile {
      /**
       * Callback to read from a file.
       */
      aiFileReadProc ReadProc;

      /**
       * Callback to write to a file.
       */
      aiFileWriteProc WriteProc;

      /**
       * Callback to retrieve the current position of the file cursor
       * (<code>ftell()</code>).
       */
      aiFileTellProc TellProc;

      /**
       * Callback to retrieve the size of the file, in bytes.
       */
      aiFileTellProc FileSizeProc;

      /**
       * Callback to set the current position of the file cursor
       * (<code>fseek()</code>).
       */
      aiFileSeek SeekProc;

      /**
       * Callback to flush the file contents.
       */
      aiFileFlushProc FlushProc;

      /**
       * User-defined, opaque data.
       */
      aiUserData UserData;
   }
}