// 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
}
// NewNode returns new Node with a given Logger.
func NewNodeConfig(logfile string, level string, cfg *NodeConfig) (node *Node, err error) {
clevel := C.CString(level)
defer C.free(unsafe.Pointer(clevel))
clogfile := C.CString(logfile)
defer C.free(unsafe.Pointer(clogfile))
var dcfg C.struct_dnet_config
C.memset(unsafe.Pointer(&dcfg), 0, C.sizeof_struct_dnet_config)
dcfg.io_thread_num = C.int(cfg.IOThreadNum)
dcfg.nonblocking_io_thread_num = C.int(cfg.NonBlockingIOThreadNum)
dcfg.net_thread_num = C.int(cfg.NetThreadNum)
dcfg.wait_timeout = C.long(cfg.WaitTimeout)
dcfg.check_timeout = C.long(cfg.CheckTimeout)
dcfg.flags = C.int(cfg.Flags)
dcfg.stall_count = C.long(cfg.StallCount)
cnode := C.new_node_config(clogfile, clevel, &dcfg)
if cnode == nil {
err = fmt.Errorf("could not create node, please check stderr output")
return
}
node = &Node{cnode}
return
}
func newGeohash(geohash string) *C.CCGeohashStruct {
cgeohash := C.CString(geohash)
cg := &C.CCGeohashStruct{}
C.memset(unsafe.Pointer(&(cg.hash[0])), '0', MaxGeohashLength) // move this on C side
C.strncpy(&(cg.hash[0]), cgeohash, C.size_t(len(geohash)))
C.init_from_hash(cg)
return cg
}
// getPPD gets the filename of the PPD for a printer by calling
// C.cupsGetPPD3. If the PPD hasn't changed since the time indicated
// by modtime, then the returned filename is a nil pointer.
//
// Note that modtime is a pointer whose value is changed by this
// function.
//
// The caller is responsible to C.free the returned *C.char filename
// if the returned filename is not nil.
func (cc *cupsCore) getPPD(printername *C.char, modtime *C.time_t) (*C.char, error) {
bufsize := C.size_t(filePathMaxLength)
buffer := (*C.char)(C.malloc(bufsize))
if buffer == nil {
return nil, errors.New("Failed to malloc; out of memory?")
}
C.memset(unsafe.Pointer(buffer), 0, bufsize)
var http *C.http_t
if !cc.hostIsLocal {
// Don't need a connection or corresponding semaphore if the PPD
// is on the local filesystem.
// Still need OS thread lock; see else.
var err error
http, err = cc.connect()
if err != nil {
return nil, err
}
defer cc.disconnect(http)
} else {
// Lock the OS thread so that thread-local storage is available to
// cupsLastError() and cupsLastErrorString().
runtime.LockOSThread()
defer runtime.UnlockOSThread()
}
httpStatus := C.cupsGetPPD3(http, printername, modtime, buffer, bufsize)
switch httpStatus {
case C.HTTP_STATUS_NOT_MODIFIED:
// Cache hit.
if len(C.GoString(buffer)) > 0 {
os.Remove(C.GoString(buffer))
}
C.free(unsafe.Pointer(buffer))
return nil, nil
case C.HTTP_STATUS_OK:
// Cache miss.
return buffer, nil
default:
if len(C.GoString(buffer)) > 0 {
os.Remove(C.GoString(buffer))
}
C.free(unsafe.Pointer(buffer))
cupsLastError := C.cupsLastError()
if cupsLastError != C.IPP_STATUS_OK {
return nil, fmt.Errorf("Failed to call cupsGetPPD3(): %d %s",
int(cupsLastError), C.GoString(C.cupsLastErrorString()))
}
return nil, fmt.Errorf("Failed to call cupsGetPPD3(); HTTP status: %d", int(httpStatus))
}
}
func strError(code C.int) string {
size := C.size_t(256)
buf := (*C.char)(C.malloc(size))
defer C.free(unsafe.Pointer(buf))
C.memset(unsafe.Pointer(buf), 0, size)
if C.av_strerror(code, buf, size-1) == 0 {
return C.GoString(buf)
}
return "Unknown error"
}
//export uimalloc
func uimalloc(n C.size_t) unsafe.Pointer {
if n > C.size_t(len(uimallocBytes)) {
// TODO round n up to a multiple of a power of 2?
// for instance 0x1234 bytes -> 0x1800 bytes
uimallocBytes = make([]byte, n)
}
p := C.malloc(n)
if p == nil {
panic("out of memory in uimalloc()")
}
C.memset(p, 0, n)
return p
}
// MakeBuffer returns a Buffer with an empty malloc-ed gss_buffer_desc in it.
// The return value must be .Release()-ed
func (lib *Lib) MakeBuffer(alloc int) (*Buffer, error) {
s := C.malloc(C.gss_buffer_size)
if s == nil {
return nil, ErrMallocFailed
}
C.memset(s, 0, C.gss_buffer_size)
b := &Buffer{
Lib: lib,
C_gss_buffer_t: C.gss_buffer_t(s),
alloc: alloc,
}
return b, nil
}
func CreateTun(name string) (*Tun, error) {
f, err := os.OpenFile(TUN_DEV, os.O_RDWR, 0)
if err != nil {
return nil, err
}
cbuf := (*C.char)(C.malloc(C.IFNAMSIZ))
defer C.free(unsafe.Pointer(cbuf))
C.memset(unsafe.Pointer(cbuf), 0, C.IFNAMSIZ)
c_name := C.CString(name)
defer C.free(unsafe.Pointer(c_name))
C.strncpy(cbuf, c_name, C.IFNAMSIZ-1)
if C.create_tun(C.int(f.Fd()), cbuf) < 0 {
return nil, fmt.Errorf("create tun fail")
}
return &Tun{C.GoString(cbuf), f}, nil
}
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
}
// Encode writes the image to the given io.Writer, encoding
// it according to the info parameter. Please, see the
// Info type for the available encoding options.
func (im *Image) Encode(w io.Writer, info *Info) error {
var ex C.ExceptionInfo
C.GetExceptionInfo(&ex)
defer C.DestroyExceptionInfo(&ex)
if info == nil {
info = NewInfo()
}
/* ImageToBlob copies the format from the image into
the image info. Overwrite if required and then restore
*/
im.mu.Lock()
var format *C.char
copied := false
if info.info.magick[0] != 0 {
copied = true
if im.image.magick[0] != 0 {
format = C.strdup(&im.image.magick[0])
}
C.strncpy(&im.image.magick[0], &info.info.magick[0], C.MaxTextExtent)
}
var s C.size_t
mem := imageToBlob(info, im, &s, &ex)
if copied {
/* Restore image format */
if format != nil {
C.strncpy(&im.image.magick[0], format, C.MaxTextExtent)
C.free(unsafe.Pointer(format))
} else {
C.memset(unsafe.Pointer(&im.image.magick[0]), 0, C.MaxTextExtent)
}
}
im.mu.Unlock()
if mem == nil {
return exError(&ex, "encoding")
}
b := goBytes(mem, int(s))
w.Write(b)
C.free(mem)
return nil
}
