PA_GetBlobVariable

version 2003

PA_GetBlobVariable (aVariable; theBlob) → long

The routine PA_GetBlobVariable puts the content of the variable aVariable in the data pointed to by theBlob and returns its size in bytes.

If aVariable does not have the kind eVK_Blob , the routine returns 0 and theBlob is returned unchanged.

If BLOB size is unknown, call the function a first time with theBlob equal to zero. The returned value will be the size of the needed buffer. Allocate the buffer and call the function again with the correct buffer.

Get a BLOB variable.

   char   *theBlob;
   long   blobSize;
 
   // First call the routine with a nil pointer to get the BLOB size
      blobSize = PA_GetBlobVariable(aVariable, 0L);
   // Then allocate the buffer
      theBlob = malloc(blobSize);
   // If it is ok, get the blob (duplicate it, in fact)
      blobSize = PA_GetBlobVariable(aVariable, theBlob);
   // Work with it
      /* . . . */
   // Cleanup
      free(theBlob);

PA_GetBlobHandleVariable .