mirror of https://github.com/vbatts/go-mtree.git
29 lines
743 B
Go
29 lines
743 B
Go
package cvis
|
|
|
|
// #include "vis.h"
|
|
// #include <stdlib.h>
|
|
import "C"
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"unsafe"
|
|
)
|
|
|
|
// Vis is a wrapper around the C implementation
|
|
func Vis(src string, flags int) (string, error) {
|
|
// dst needs to be 4 times the length of str, must check appropriate size
|
|
if uint32(len(src)*4+1) >= math.MaxUint32/4 {
|
|
return "", fmt.Errorf("failed to encode: %q", src)
|
|
}
|
|
dst := string(make([]byte, 4*len(src)+1))
|
|
cDst, cSrc := C.CString(dst), C.CString(src)
|
|
defer C.free(unsafe.Pointer(cDst))
|
|
defer C.free(unsafe.Pointer(cSrc))
|
|
C.strvis(cDst, cSrc, C.int(flags))
|
|
|
|
return C.GoString(cDst), nil
|
|
}
|
|
|
|
// DefaultVisFlags are the common flags used in mtree string encoding
|
|
var DefaultVisFlags = C.VIS_WHITE | C.VIS_OCTAL | C.VIS_GLOB
|