c('PL_get_blob')

Documentation
- Reference manual
  - Foreign Language Interface
    - The Foreign Include File
      - BLOBS: Using atoms to store arbitrary binary data
        
        Accessing blobs
        
        PL_is_blob()
        
        PL_unify_blob()
        
        PL_put_blob()
        
        PL_new_blob()
        
        PL_get_blob()
        
        PL_blob_data()
        
        PL_free_blob()
- Packages

, the default implementation assumes that the blob was written by the default “save'' - that is, as an array of bytes

SWI-Stream.h defines a number of PL_qlf_get_*() functions that read data in a machine-independent form, as written by the by the corresponding PL_qlf_put_*() functions.