func NewField(height int, width int, top int, left int, offscreen int, nbuf int) (*Field, error) {
field := (*Field)(C.new_field(C.int(height), C.int(width), C.int(top), C.int(left), C.int(offscreen), C.int(nbuf)))
if field == nil {
return nil, FormsError{"NewField failed"}
}
return field, nil
}
// Prepare query string. Return a new statement.
func (c *SQLiteConn) Prepare(query string) (driver.Stmt, error) {
pquery := C.CString(query)
defer C.free(unsafe.Pointer(pquery))
var s *C.sqlite3_stmt
var tail *C.char
rv := C.sqlite3_prepare_v2(c.db, pquery, -1, &s, &tail)
if rv != C.SQLITE_OK {
return nil, c.lastError()
}
var t string
if tail != nil && *tail != '\000' {
t = strings.TrimSpace(C.GoString(tail))
}
nv := int(C.sqlite3_bind_parameter_count(s))
var nn []string
for i := 0; i < nv; i++ {
pn := C.GoString(C.sqlite3_bind_parameter_name(s, C.int(i+1)))
if len(pn) > 1 && pn[0] == '$' && 48 <= pn[1] && pn[1] <= 57 {
nn = append(nn, C.GoString(C.sqlite3_bind_parameter_name(s, C.int(i+1))))
}
}
ss := &SQLiteStmt{c: c, s: s, nv: nv, nn: nn, t: t}
runtime.SetFinalizer(ss, (*SQLiteStmt).Close)
return ss, nil
}
func (c *Code) getDecode(errList []byte, cache bool) (node *decodeNode) {
if cache {
node = c.decode.getDecode(errList, 0, byte(c.M))
} else {
node = newDecodeNode(errList, byte(c.M))
}
node.mutex.Lock()
defer node.mutex.Unlock()
if node.galoisTables == nil || node.decodeIndex == nil {
node.galoisTables = make([]byte, c.K*c.M*32)
node.decodeIndex = make([]byte, c.K)
decodeMatrix := make([]byte, c.M*c.K)
srcInErr := make([]byte, c.M)
nErrs := len(errList)
nSrcErrs := 0
for _, err := range errList {
srcInErr[err] = 1
if int(err) < c.K {
nSrcErrs++
}
}
C.gf_gen_decode_matrix((*C.uchar)(&c.EncodeMatrix[0]), (*C.uchar)(&decodeMatrix[0]), (*C.uchar)(&node.decodeIndex[0]), (*C.uchar)(&errList[0]), (*C.uchar)(&srcInErr[0]), C.int(nErrs), C.int(nSrcErrs), C.int(c.K), C.int(c.M))
C.ec_init_tables(C.int(c.K), C.int(nErrs), (*C.uchar)(&decodeMatrix[0]), (*C.uchar)(&node.galoisTables[0]))
}
return node
}
// Sets the debugging hook function.
//
// Argument fn is the hook function. mask specifies on which events the hook
// will be called: it is formed by a bitwise OR of the constants Maskcall,
// Maskret, Maskline, and Maskcount. The count argument is only meaningful
// when the mask includes Maskcount. The hook is called for each event type
// present in mask.
//
// A hook is disabled by setting mask to 0.
func (s *State) Sethook(fn Hook, mask, count int) error {
s.Getglobal(namehooks)
if mask&Maskcall == Maskcall {
s.Pushstring(namecall)
s.Pushlightuserdata(unsafe.Pointer(&fn))
s.Settable(-3)
}
if mask&Maskret == Maskret {
s.Pushstring(nameret)
s.Pushlightuserdata(unsafe.Pointer(&fn))
s.Settable(-3)
}
if mask&Maskline == Maskline {
s.Pushstring(nameline)
s.Pushlightuserdata(unsafe.Pointer(&fn))
s.Settable(-3)
}
if mask&Maskcount == Maskcount {
s.Pushstring(namecount)
s.Pushlightuserdata(unsafe.Pointer(&fn))
s.Settable(-3)
}
s.Pop(1) // pop hook table
C.sethook(s.l, C.int(mask), C.int(count))
return nil
}
//recovers the public key from the signature
//recovery of pubkey means correct signature
func RecoverPubkey(msg []byte, sig []byte) []byte {
if len(sig) != 65 {
log.Panic()
}
var pubkey []byte = make([]byte, 33)
var msg_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&msg[0]))
var sig_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&sig[0]))
var pubkey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&pubkey[0]))
var pubkeylen C.int
ret := C.secp256k1_ecdsa_recover_compact(
msg_ptr, C.int(len(msg)),
sig_ptr,
pubkey_ptr, &pubkeylen,
C.int(1), C.int(sig[64]),
)
if ret == 0 || int(pubkeylen) != 33 {
return nil
}
return pubkey
}
func NewMat(r, c int) Mat {
var m Mat
m.mat = C.NewGOMat(C.int(r), C.int(c))
//m.Row() = r
//m.Colunm() = c
return m
}
func (t *Sound) Play(loops int) {
t.channel = int(C.Mix_PlayChannelTimed(C.int(-1), t.chunk, C.int(loops), C.int(-1)))
if t.channel == -1 {
panic(fmt.Sprintf("Unable to play Sound file (%v): %v", t.name, util.GetMixError()))
}
t.SetVolume(GDefaultVolume)
}
// MONGO_EXPORT int mongo_update( mongo *conn, const char *ns, const bson *cond,
// const bson *op, int flags, mongo_write_concern *custom_write_concern );
func (m *Mongo) Update(ns string, cond, op *Bson, flags int, writeConcern *MongoWriteConcern) int {
if writeConcern == nil {
return int(C.mongo_update(m.conn, C.CString(ns), cond._bson, op._bson, C.int(flags), nil))
}
return int(C.mongo_update(m.conn, C.CString(ns), cond._bson,
op._bson, C.int(flags), writeConcern.writeConcern))
}
func (re *Regexp) find(b []byte, n int, offset int) (match []int) {
if n == 0 {
b = []byte{0}
}
ptr := unsafe.Pointer(&b[0])
matchData := re.matchData
capturesPtr := unsafe.Pointer(&(matchData.indexes[matchData.count][0]))
numCaptures := int32(0)
numCapturesPtr := unsafe.Pointer(&numCaptures)
pos := int(C.SearchOnigRegex((ptr), C.int(n), C.int(offset), C.int(ONIG_OPTION_DEFAULT), re.regex, re.region, re.errorInfo, (*C.char)(nil), (*C.int)(capturesPtr), (*C.int)(numCapturesPtr)))
if pos >= 0 {
if numCaptures <= 0 {
panic("cannot have 0 captures when processing a match")
}
match2 := matchData.indexes[matchData.count][:numCaptures*2]
match = make([]int, len(match2))
for i := range match2 {
match[i] = int(match2[i])
}
numCapturesInPattern := int32(C.onig_number_of_captures(re.regex)) + 1
if numCapturesInPattern != numCaptures {
log.Fatalf("expected %d captures but got %d\n", numCapturesInPattern, numCaptures)
}
}
return
}
func Parse(content, inEncoding, url []byte, options int, outEncoding []byte) (doc *XmlDocument, err error) {
inEncoding = AppendCStringTerminator(inEncoding)
outEncoding = AppendCStringTerminator(outEncoding)
var docPtr *C.xmlDoc
contentLen := len(content)
if contentLen > 0 {
var contentPtr, urlPtr, encodingPtr unsafe.Pointer
contentPtr = unsafe.Pointer(&content[0])
if len(url) > 0 {
url = AppendCStringTerminator(url)
urlPtr = unsafe.Pointer(&url[0])
}
if len(inEncoding) > 0 {
encodingPtr = unsafe.Pointer(&inEncoding[0])
}
docPtr = C.xmlParse(contentPtr, C.int(contentLen), urlPtr, encodingPtr, C.int(options), nil, 0)
if docPtr == nil {
err = ERR_FAILED_TO_PARSE_XML
} else {
doc = NewDocument(unsafe.Pointer(docPtr), contentLen, inEncoding, outEncoding)
}
} else {
doc = CreateEmptyDocument(inEncoding, outEncoding)
}
return
}
// Emit is a wrapper around g_signal_emitv() and emits the signal
// specified by the string s to an Object. Arguments to callback
// functions connected to this signal must be specified in args. Emit()
// returns an interface{} which must be type asserted as the Go
// equivalent type to the return value for native C callback.
//
// Note that this code is unsafe in that the types of values in args are
// not checked against whether they are suitable for the callback.
func (v *Object) Emit(s string, args ...interface{}) (interface{}, error) {
cstr := C.CString(s)
defer C.free(unsafe.Pointer(cstr))
// Create array of this instance and arguments
valv := C.alloc_gvalue_list(C.int(len(args)) + 1)
defer C.free(unsafe.Pointer(valv))
// Add args and valv
val, err := GValue(v)
if err != nil {
return nil, errors.New("Error converting Object to GValue: " + err.Error())
}
C.val_list_insert(valv, C.int(0), val.native())
for i := range args {
val, err := GValue(args[i])
if err != nil {
return nil, fmt.Errorf("Error converting arg %d to GValue: %s", i, err.Error())
}
C.val_list_insert(valv, C.int(i+1), val.native())
}
t := v.TypeFromInstance()
// TODO: use just the signal name
id := C.g_signal_lookup((*C.gchar)(cstr), C.GType(t))
ret, err := ValueAlloc()
if err != nil {
return nil, errors.New("Error creating Value for return value")
}
C.g_signal_emitv(valv, id, C.GQuark(0), ret.native())
return ret.GoValue()
}
// Sets the value of a closure's upvalue. It assigns the value at the top
// of the stack to the upvalue and returns its name. It also pops the value
// from the stack. Parameters funcindex and n are as in the Getupvalue.
//
// Returns an error (and pops nothing) when the index is greater
// than the number of upvalues.
func (this *State) Setupvalue(funcindex, n int) (string, error) {
r := C.lua_setupvalue(this.luastate, C.int(funcindex), C.int(n))
if r == nil {
return "", errors.New("index exceeds number of upvalues")
}
return C.GoString(r), nil
}
func (field *Field) Link(top int, left int) (*Field, error) {
link := (*Field)(C.link_field((*C.FIELD)(field), C.int(top), C.int(left)))
if link == nil {
return nil, FormsError{"Field.Link failed"}
}
return link, nil
}
func (field *Field) DupField(top int, left int) (*Field, error) {
dup := (*Field)(C.dup_field((*C.FIELD)(field), C.int(top), C.int(left)))
if dup == nil {
return nil, FormsError{"Field.Dup failed"}
}
return dup, nil
}
// The C side of things will still need to allocate memory, due to the slices.
// Assumes Configuration is valid.
func (config *Configuration) _CGO() *C.CGO_Configuration {
INFO.Println("Converting Config: ", config)
size := C.size_t(unsafe.Sizeof(C.CGO_Configuration{}))
c := (*C.CGO_Configuration)(C.malloc(size))
// Need to convert each IceServer struct individually.
total := len(config.IceServers)
if total > 0 {
sizeof := unsafe.Sizeof(C.CGO_IceServer{})
cServers := unsafe.Pointer(C.malloc(C.size_t(sizeof * uintptr(total))))
ptr := uintptr(cServers)
for _, server := range config.IceServers {
*(*C.CGO_IceServer)(unsafe.Pointer(ptr)) = server._CGO()
ptr += sizeof
}
c.iceServers = (*C.CGO_IceServer)(cServers)
}
c.numIceServers = C.int(total)
// c.iceServers = (*C.CGO_IceServer)(unsafe.Pointer(&config.IceServers))
c.iceTransportPolicy = C.int(config.IceTransportPolicy)
c.bundlePolicy = C.int(config.BundlePolicy)
// [ED] c.RtcpMuxPolicy = C.int(config.RtcpMuxPolicy)
c.peerIdentity = C.CString(config.PeerIdentity)
// [ED] c.Certificates = config.Certificates
// [ED] c.IceCandidatePoolSize = C.int(config.IceCandidatePoolSize)
return c
}
func (self *Device) BulkRead(ep int, dat []byte) int {
return int(C.usb_bulk_read(self.handle,
C.int(ep),
(*C.char)(unsafe.Pointer(&dat[0])),
C.int(len(dat)),
C.int(self.timeout)))
}
// Full customization of the call. Arguments essentially map to UI_UTIL_read_pw_string
func GetPassWithOptions(prompt string, confirm, max int) (pw string, e error) {
pw = ""
e = nil
if max <= 0 {
e = errors.New("Invalid argument: maximum password length")
return pw, e
}
if len(prompt) <= 0 {
e = errors.New("Invalid argument: prompt")
return pw, e
}
sz := C.int(max)
buf := C.malloc(C.size_t(sz))
bptr := (*C.char)(buf)
p := C.CString(prompt)
rc, err := C.UI_UTIL_read_pw_string(bptr, sz, p, C.int(confirm))
if rc != 0 {
e = err
} else {
pw = C.GoString(bptr)
}
C.free(buf)
return pw, e
}
func sqlOpen(name string, flags int, vfs string) (conn *sqlConnection, rc int) {
conn = new(sqlConnection)
p := C.CString(name)
if len(vfs) > 0 {
q := C.CString(vfs)
rc = int(C.sqlite3_open_v2(p, &conn.handle, C.int(flags), q))
C.free(unsafe.Pointer(q))
} else {
rc = int(C.sqlite3_open_v2(p, &conn.handle, C.int(flags), nil))
}
C.free(unsafe.Pointer(p))
// We could get a handle even if there's an error, see
// http://www.sqlite.org/c3ref/open.html for details.
// Initially we didn't want to return a connection on
// error, but we actually have to since we want to fill
// in a SystemError struct. Sigh.
// if rc != StatusOk && conn.handle != nil {
// _ = conn.sqlClose();
// conn = nil;
// }
return
}
//export get_route_family
func get_route_family(input *C.char) C.int {
rf, err := bgp.GetRouteFamily(C.GoString(input))
if err != nil {
return C.int(-1)
}
return C.int(rf)
}
func SetVideoMode(width int, height int, bpp int, flags int) {
screen := C.SDL_SetVideoMode(C.int(width), C.int(height), C.int(bpp), C.Uint32(flags))
if screen == nil {
panic("unable to set video mode")
}
}
func (t *Sound) FadeIn(duration Double, loops int) {
t.channel = int(C.Mix_FadeInChannelTimed(C.int(-1), t.chunk, C.int(loops), C.int(duration*1000.0), C.int(-1)))
if t.channel == -1 {
panic(fmt.Sprintf("Unable to FadeIn Sound file (%v): %v", t.name, util.GetMixError()))
}
t.SetVolume(GDefaultVolume)
}
func Get_result_info(req_handle int) ([]GCI_COL_INFO, GCI_CUBRID_STMT, int) {
var handle C.int = C.int(req_handle)
var c_col_info *C.T_CCI_COL_INFO
var go_col_info []C.T_CCI_COL_INFO
var cubrid_stmt C.T_CCI_CUBRID_STMT
var col_count C.int
var gci_col_info []GCI_COL_INFO
var gci_cubrid_stmt GCI_CUBRID_STMT
c_col_info = C.cci_get_result_info(handle, &cubrid_stmt, &col_count)
gci_cubrid_stmt = GCI_CUBRID_STMT(cubrid_stmt)
sliceHeader := (*reflect.SliceHeader)((unsafe.Pointer(&go_col_info)))
sliceHeader.Cap = int(col_count)
sliceHeader.Len = int(col_count)
sliceHeader.Data = uintptr(unsafe.Pointer(c_col_info))
gci_col_info = make([]GCI_COL_INFO, int(col_count))
for i := 0; i < int(col_count); i++ {
gci_col_info[i].u_type = GCI_U_TYPE(go_col_info[C.int(i)]._type)
gci_col_info[i].is_non_null = C.GoString(&go_col_info[C.int(i)].is_non_null)
gci_col_info[i].scale = int16(go_col_info[C.int(i)].scale)
gci_col_info[i].precision = int(go_col_info[C.int(i)].precision)
}
return gci_col_info, gci_cubrid_stmt, int(col_count)
}
//generate signature in repeatable way
func SignDeterministic(msg []byte, seckey []byte, nonce_seed []byte) []byte {
nonce := SumSHA256(nonce_seed) //deterministicly generate nonce
var sig []byte = make([]byte, 65)
var recid C.int
var msg_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&msg[0]))
var seckey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&seckey[0]))
var nonce_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&nonce[0]))
var sig_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&sig[0]))
if C.secp256k1_ecdsa_seckey_verify(seckey_ptr) != C.int(1) {
log.Panic("Invalid secret key")
}
ret := C.secp256k1_ecdsa_sign_compact(
msg_ptr, C.int(len(msg)),
sig_ptr,
seckey_ptr,
nonce_ptr,
&recid)
sig[64] = byte(int(recid))
if int(recid) > 4 {
log.Panic()
}
if ret != 1 {
return SignDeterministic(msg, seckey, nonce_seed) //nonce invalid,retry
}
return sig
}
// OpenDead creates a Pcap handle without having it attached to a device
// or to a file. It is typically used when just using the pcap package
// for compiling BPF code.
func OpenDead(linktype layers.LinkType, snaplen int32) (handle *Handle, _ error) {
cptr := C.pcap_open_dead(C.int(linktype), C.int(snaplen))
if cptr == nil {
return nil, errors.New("pcap_open_dead failed")
}
return &Handle{cptr: cptr}, nil
}
func (s *driverStmt) exec(params []driver.Value) *C.PGresult {
stmtName := C.CString(s.name)
defer C.free(unsafe.Pointer(stmtName))
cparams := buildCArgs(params)
defer C.freeCharArray(cparams, C.int(len(params)))
return C.PQexecPrepared(s.db, stmtName, C.int(len(params)), cparams, nil, nil, 0)
}
func (osx *osxSystemObject) CreateWindow(x, y, width, height int) {
globalLock.Lock()
defer globalLock.Unlock()
w := (*unsafe.Pointer)(unsafe.Pointer(&osx.window))
c := (*unsafe.Pointer)(unsafe.Pointer(&osx.context))
C.CreateWindow(w, c, C.int(x), C.int(y), C.int(width), C.int(height))
}
// Data buffer to decode must be of the (M/K)*Size given in the constructor.
// The error list must contain M-K values, corresponding to the shards
// with errors (eg. [0, 2, 4, 6]).
// Cache stores the decode matrices in a trie, enabling a faster decode
// with a memory tradeoff.
// The returned decoded data is the orignal data of length Size
func (c *Code) Decode(encoded []byte, errList []byte, cache bool) (recovered []byte) {
if len(encoded) != c.M*c.ShardLength {
panic("Data to decode is not the proper size")
}
if len(errList) > c.M-c.K {
panic("Too many errors, cannot decode")
}
if len(errList) == 0 {
recovered = append(recovered, encoded[:c.K*c.ShardLength]...)
} else {
node := c.getDecode(errList, cache)
for i := 0; i < c.K; i++ {
recovered = append(recovered, encoded[(int(node.decodeIndex[i])*c.ShardLength):int(node.decodeIndex[i]+1)*c.ShardLength]...)
}
decoded := make([]byte, c.M*c.ShardLength)
C.ec_encode_data(C.int(c.ShardLength), C.int(c.K), C.int(c.M), (*C.uchar)(&node.galoisTables[0]), (*C.uchar)(&recovered[0]), (*C.uchar)(&decoded[0]))
copy(recovered, encoded)
for i, err := range errList {
if int(err) < c.K {
copy(recovered[int(err)*c.ShardLength:int(err+1)*c.ShardLength], decoded[i*c.ShardLength:(i+1)*c.ShardLength])
}
}
}
return recovered
}
func toFeatureNodes(X *mat64.Dense) []*C.struct_feature_node {
featureNodes := []*C.struct_feature_node{}
nRows, nCols := X.Dims()
for i := 0; i < nRows; i++ {
row := []C.struct_feature_node{}
for j := 0; j < nCols; j++ {
val := X.At(i, j)
if val != 0 {
row = append(row, C.struct_feature_node{
index: C.int(j + 1),
value: C.double(val),
})
}
}
row = append(row, C.struct_feature_node{
index: C.int(-1),
value: C.double(0),
})
featureNodes = append(featureNodes, &row[0])
}
return featureNodes
}
// Sets up a video mode with the specified width, height, bits-per-pixel and
// returns a corresponding surface. You don't need to call the Free method
// of the returned surface, as it will be done automatically by sdl.Quit.
func SetVideoMode(w int, h int, bpp int, flags uint32) *Surface {
GlobalMutex.Lock()
var screen = C.SDL_SetVideoMode(C.int(w), C.int(h), C.int(bpp), C.Uint32(flags))
currentVideoSurface = wrap(screen)
GlobalMutex.Unlock()
return currentVideoSurface
}
// Image places the image in s image at (x,y) with dimensions (w,h)
func Image(x, y float64, w, h int, s string) {
f, ferr := os.Open(s)
if ferr != nil {
fakeimage(x, y, w, h, s)
return
}
defer f.Close()
img, _, err := image.Decode(f)
if err != nil {
fakeimage(x, y, w, h, s)
return
}
bounds := img.Bounds()
minx := bounds.Min.X
maxx := bounds.Max.X
miny := bounds.Min.Y
maxy := bounds.Max.Y
data := make([]C.VGubyte, w*h*4)
n := 0
// println("minx", minx, "maxx", maxx, "miny", miny, "maxy", maxy)
for y := miny; y < maxy; y++ {
for x := minx; x < maxx; x++ {
r, g, b, a := img.At(x, (maxy-1)-y).RGBA() // OpenVG has origin at lower left, y increasing up
data[n] = C.VGubyte(r)
n++
data[n] = C.VGubyte(g)
n++
data[n] = C.VGubyte(b)
n++
data[n] = C.VGubyte(a)
n++
}
}
C.makeimage(C.VGfloat(x), C.VGfloat(y), C.int(w), C.int(h), &data[0])
}
