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x/ffi: wrap c/ffi

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This commit is contained in:
visualfc
2024-10-23 11:44:34 +08:00
parent 92c267758e
commit 363be18599
15 changed files with 435 additions and 224 deletions
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14
c/ffi/_demo/printf/main.go
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@@ -7,14 +7,20 @@ import (
"github.com/goplus/llgo/c/ffi"
)
var (
typeInt32 = &ffi.Type{4, 4, ffi.Sint32, nil}
typePointer = &ffi.Type{unsafe.Sizeof(0), uint16(unsafe.Alignof(0)), ffi.Pointer, nil}
)
func main() {
sig, err := ffi.NewSignatureVar(ffi.TypeInt32, 1, ffi.TypePointer, ffi.TypeInt32)
if err != nil {
panic(err)
var cif ffi.Cif
status := ffi.PrepCifVar(&cif, ffi.DefaultAbi, 1, 2, typeInt32, &[]*ffi.Type{typePointer, typeInt32}[0])
if status != ffi.OK {
panic(status)
}
var ret int32
text := c.Str("hello world: %d\n")
var n int32 = 100
ffi.Call(sig, c.Func(c.Printf), unsafe.Pointer(&ret), unsafe.Pointer(&text), unsafe.Pointer(&n))
ffi.Call(&cif, c.Func(c.Printf), unsafe.Pointer(&ret), &[]unsafe.Pointer{unsafe.Pointer(&text), unsafe.Pointer(&n)}[0])
c.Printf(c.Str("ret: %d\n"), ret)
}