go-mtree/unvis.go

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package mtree
// #include "vis.h"
// #include <stdlib.h>
import "C"
import (
"fmt"
"unsafe"
)
// Unvis is a wrapper for the C implementation of unvis, which decodes a string
// that potentially has characters that are encoded with Vis
func Unvis(src string) (string, error) {
cDst, cSrc := C.CString(string(make([]byte, len(src)+1))), C.CString(src)
defer C.free(unsafe.Pointer(cDst))
defer C.free(unsafe.Pointer(cSrc))
ret := C.strunvis(cDst, cSrc)
if ret == -1 {
return "", fmt.Errorf("failed to decode: %q", src)
}
return C.GoString(cDst), nil
}