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Guile Reference Manual

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27.10.1.1 Port basics

There are two main data structures. A port type object (ptob) is of type scm_ptob_descriptor. A port instance is of type scm_port. Given an SCM variable which points to a port, the corresponding C port object can be obtained using the SCM_PTAB_ENTRY macro. The ptob can be obtained by using SCM_PTOBNUM to give an index into the scm_ptobs global array.


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