41 lines
854 B
Go
41 lines
854 B
Go
package builtins
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import "monkey/object"
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import (
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"fmt"
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"plugin"
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)
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// FFI ...
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func FFI(args ...object.Object) object.Object {
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if len(args) != 2 {
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return newError("wrong number of arguments. got=%d, want=2",
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len(args))
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}
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arg, ok := args[0].(*object.String)
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if !ok {
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return newError("argument #1 to `ffi` expected to be `str` got=%T", args[0].Type())
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}
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name := arg.Value
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arg, ok = args[1].(*object.String)
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if !ok {
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return newError("argument #2 to `ffi` expected to be `str` got=%T", args[0].Type())
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}
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symbol := arg.Value
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p, err := plugin.Open(fmt.Sprintf("%s.so", name))
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if err != nil {
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return newError("error loading plugin: %s", err)
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}
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v, err := p.Lookup(symbol)
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if err != nil {
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return newError("error finding symbol: %s", err)
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}
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return &object.Builtin{Name: symbol, Fn: v.(func(...object.Object) object.Object)}
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}
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