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5.26.8 Low-Level C Interface Words

open-lib ( c-addr1 u1 – u2 ) gforth-0.4 “open-lib”
lib-sym ( c-addr1 u1 u2 – u3 ) gforth-0.4 “lib-sym”
lib-error ( – c-addr u ) gforth-0.7 “lib-error”

Error message for last failed open-lib or lib-sym.

call-c ( ... w – ... ) gforth-0.4 “call-c”

Call the C function pointed to by w. The C function has to access the stack itself. The stack pointers are exported into a ptrpair structure passed to the C function, and returned in that form.