// MakeOIDBytes makes an OID encapsulating a byte slice. Note that it does not
// duplicate the data, but rather it points to it directly.
func (lib *Lib) MakeOIDBytes(data []byte) (*OID, error) {
oid := lib.NewOID()
s := C.malloc(C.gss_OID_size) // s for struct
if s == nil {
return nil, ErrMallocFailed
}
C.memset(s, 0, C.gss_OID_size)
l := C.size_t(len(data))
e := C.malloc(l) // c for contents
if e == nil {
return nil, ErrMallocFailed
}
C.memmove(e, (unsafe.Pointer)(&data[0]), l)
oid.C_gss_OID = C.gss_OID(s)
oid.alloc = allocMalloc
// because of the alignment issues I can't access o.oid's fields from go,
// so invoking a C function to do the same as:
// oid.C_gss_OID.length = l
// oid.C_gss_OID.elements = c
C.helper_gss_OID_desc_set_elements(oid.C_gss_OID, C.OM_uint32(l), e)
return oid, nil
}
func GoEval2(expr *C.char, result **C.char) int {
var res string
var ret int
src := C.GoString(expr)
world := eval.NewWorld()
world.DefineVar("remote_expr", eval.NewFuncType([]eval.Type{eval.StringType, eval.StringType}, false, []eval.Type{eval.StringType}), &funcV{&w_remote_expr{}})
code, err := world.Compile(fset, src)
if err != nil {
res = err.String()
ret = -1
} else {
value, err := code.Run()
if err != nil {
res = err.String()
ret = -1
} else {
res = value.String()
ret = 0
}
}
p := C.CString(res)
defer C.free(unsafe.Pointer(p))
*result = (*C.char)(C.vimremote_malloc((C.size_t)(len(res) + 1)))
C.memmove(unsafe.Pointer(*result), unsafe.Pointer(p), (C.size_t)(len(res)+1))
return ret
}
func swiftBytesCopy(data []byte) C.SwiftByteArray {
var a C.SwiftByteArray
a.length = C._GoUint64(len(data))
a.data = C.malloc(C.size_t(len(data)))
if a.data == nil {
panic(fmt.Errorf("Unable to allocate %d bytes", a.length))
}
C.memmove(a.data, unsafe.Pointer(&data[0]), C.size_t(len(data)))
return a
}
func memmove(dest, src []byte) int {
n := len(src)
if len(dest) < len(src) {
n = len(dest)
}
if n == 0 {
return 0
}
C.memmove(unsafe.Pointer(&dest[0]), unsafe.Pointer(&src[0]), C.size_t(n))
return n
}
//export GoEval
func GoEval(expr *C.char, result **C.char) int {
var ret int
func() {
defer func() {
if x := recover(); x != nil {
ret = -1
res := fmt.Sprintf("%s", x)
p := C.CString(res)
defer C.free(unsafe.Pointer(p))
*result = (*C.char)(C.vimremote_malloc((C.size_t)(len(res) + 1)))
C.memmove(unsafe.Pointer(*result), unsafe.Pointer(p), (C.size_t)(len(res)+1))
}
}()
ret = GoEval2(expr, result)
}()
return ret
}
// Read pulls bytes out of the shared memory segment.
func (shma *SharedMemMount) Read(p []byte) (int, error) {
var err error
l := uint(len(p))
if l > (shma.length - shma.offset) {
l = shma.length - shma.offset
err = io.EOF
}
if l == 0 {
return 0, err
}
src := unsafe.Pointer(uintptr(shma.ptr) + uintptr(shma.offset))
dest := unsafe.Pointer(&p[0])
C.memmove(dest, src, C.size_t(l))
shma.offset += l
return int(l), err
}
//export go_read_callback
func go_read_callback(result *C.struct_go_read_result, key uint64, buffer_key uint64) {
context, err := Pool.Get(key)
if err != nil {
panic("Unable to find read callback")
}
callback := context.(func(*readResult))
Result := &readResult{
cmd: NewDnetCmd(result.cmd),
addr: NewDnetAddr(result.addr),
ioattr: NewDnetIOAttr(result.io_attribute),
err: nil,
}
if buffer_key != 0 {
buffer_context, err := Pool.Get(buffer_key)
if err != nil {
panic("Unable to find buffer key context")
}
buffer := buffer_context.([]byte)
size := uint64(len(buffer))
if uint64(result.size) < size {
size = uint64(result.size)
}
C.memmove(unsafe.Pointer(&buffer[0]), unsafe.Pointer(result.file), C.size_t(size))
Result.ioattr.Size = size
Result.data = buffer[:size]
} else {
if result.size > 0 && result.file != nil {
Result.data = C.GoBytes(unsafe.Pointer(result.file), C.int(result.size))
} else {
Result.data = make([]byte, 0)
}
Result.ioattr.Size = uint64(len(Result.data))
}
// All data from C++ has been copied here.
callback(Result)
}
func test6506() {
// nothing to run, just make sure this compiles
var x C.size_t
C.calloc(x, x)
C.malloc(x)
C.realloc(nil, x)
C.memcpy(nil, nil, x)
C.memcmp(nil, nil, x)
C.memmove(nil, nil, x)
C.strncpy(nil, nil, x)
C.strncmp(nil, nil, x)
C.strncat(nil, nil, x)
x = C.strxfrm(nil, nil, x)
C.memchr(nil, 0, x)
x = C.strcspn(nil, nil)
x = C.strspn(nil, nil)
C.memset(nil, 0, x)
x = C.strlen(nil)
_ = x
}
// Write places bytes into the shared memory segment.
func (shma *SharedMemMount) Write(p []byte) (int, error) {
if shma.readonly {
// see comment on readonly field above
return 0, errors.New("Read-Only shared mem attachment")
}
var err error
l := uint(len(p))
if l > (shma.length - shma.offset) {
l = shma.length - shma.offset
err = io.ErrShortWrite
}
if l == 0 {
return 0, err
}
dest := unsafe.Pointer(uintptr(shma.ptr) + uintptr(shma.offset))
src := unsafe.Pointer(&p[0])
C.memmove(dest, src, C.size_t(l))
shma.offset += l
return int(l), err
}
// MakeBufferBytes makes a Buffer encapsulating a byte slice.
func (lib *Lib) MakeBufferBytes(data []byte) (*Buffer, error) {
if len(data) == 0 {
return lib.GSS_C_NO_BUFFER, nil
}
// have to allocate the memory in C land and copy
b, err := lib.MakeBuffer(allocMalloc)
if err != nil {
return nil, err
}
l := C.size_t(len(data))
c := C.malloc(l)
if b == nil {
return nil, ErrMallocFailed
}
C.memmove(c, (unsafe.Pointer)(&data[0]), l)
b.C_gss_buffer_t.length = l
b.C_gss_buffer_t.value = c
b.alloc = allocMalloc
return b, nil
}
func (a *arena) Allocate(obj []byte) (C.CK_VOID_PTR, C.CK_ULONG) {
cobj := C.calloc(C.size_t(len(obj)), 1)
*a = append(*a, cobj)
C.memmove(cobj, unsafe.Pointer(&obj[0]), C.size_t(len(obj)))
return C.CK_VOID_PTR(cobj), C.CK_ULONG(len(obj))
}
