include file not found: stdbool.h

[xlab]

include file not found: stdbool.h

[xlab]

@happierall I added a bugfix into c-for-go, please update. The missing functions like UA_Client_readValueAttribute would appear in the result.

Also I suggest you to avoid lower in camel-case libraries like this one, try generating with my version of manifest, the results will be much more readable:

TRANSLATOR:
  ConstRules:
    defines: expand
    enum: expand

  PtrTips:
    function:
      - {target: ^UA_, tips: [ref,ref,ref]}

  Rules:
    global:
      - {action: accept, from: "^UA_"}
      - {action: replace, from: "(i?)^UA_", to: _}
      - {transform: export}
    function:
      - {action: ignore, from: "EndpointUrl_split"}
    const:
      - {action: ignore, from: "INT64_MIN"}
      - {action: ignore, from: "INT64_MAX"}
      - {action: ignore, from: "UINT64_MIN"}
      - {action: ignore, from: "UINT64_MAX"}
      - {action: ignore, from: "LOGLEVEL"}

    type:
      - {action: replace, from: "_t$"}

    private:
      - {transform: unexport}

    post-global:
      - {action: doc, from: "^UA_u?int[0-9]+_t"} # types like ogg_uint32_t
      - {action: replace, from: _$}
      - {load: snakecase}

[cznic]

The error means that stdbool.h was not found in any of the include directories specified in the yaml configuration file. You have to find where your system has that include file and use that path in the list of include paths. Or maybe try using the host configuration using -ccdefs

[ianberdin]

Solved by add:

typedef int bool;
#define true 1
#define false 0

[ianberdin]

But I have new errors:

open62541.h:1654:5: undefined: __builtin_object_size
open62541.h:1654:5: undefined: __builtin___memset_chk
open62541.h:1654:5: called object is not a function or function pointer (have '')
open62541.h:1654:5: called object is not a function or function pointer (have '')
open62541.h:5162:5: undefined: __builtin_object_size
open62541.h:5162:5: undefined: __builtin___memset_chk
open62541.h:5162:5: called object is not a function or function pointer (have '')
open62541.h:5162:5: called object is not a function or function pointer (have '')
open62541.h:5187:5: undefined: __builtin_object_size
open62541.h:5187:5: undefined: __builtin___memset_chk
too many errors

[xlab]

@happierall seems that the code relies on built-in functions we don't have. You can override or disable any macro or built-in reference (this is documented briefly). For this particular case use the following:

PARSER:
  Defines:
    __builtin___memset_chk: {}
    __builtin_object_size: {}

After that the errors went away. Also, I've fixed an unrelated bug in c-for-go, please update. In your manifest try using expand rather than eval for defines / enums. This will improve the readability of results!

TRANSLATOR:
  ConstRules:
    defines: expand
    enum: expand

Final note. The only problem I got is that the header defines an UInt value using Int64 type, the Go side reports a const overflow. You'd better ignore that single const (use YAML/ RE rules):

	// Uint64Max as defined in ua/open62541.h:664
	Uint64Max = (Int64)(18446744073709551615)

Happy hacking!

[ianberdin]

Thank you. It's work. But now out lib haven't functions like UA_Client_readValueAttribute :(

ua.yml

---
GENERATOR:
  PackageName: ua
  PackageDescription: "Package ua provides Go bindings for open62541"
  PackageLicense: "THE AUTOGENERATED LICENSE. ALL THE RIGHTS ARE RESERVED BY ROBOTS."
  Includes: ["open62541.h"]

PARSER:
  IncludePaths: ["/usr/local/include", "/usr/include"]
  SourcesPaths: ["open62541.h"]
  Defines:
    __builtin___memset_chk: {}
    __builtin_object_size: {}

TRANSLATOR:
  ConstRules:
    defines: expand
    enum: expand

  PtrTips:
    function:
      - {target: ^Ua_, tips: [ref,ref,ref]}

  Rules:
    global:
      - {transform: lower}
      - {action: accept, from: "^UA_"}
      - {action: replace, from: "^Ua_", to: _}
      - {transform: export}

    function:
      - {action: accept, from: "^UA"}
      - {action: replace, from: "^Ua"}
      - {action: ignore, from: "UA_EndpointUrl_split"}

    const:
      - {action: accept, from: "^UA_"}
      - {action: replace, from: "^Ua"}
      - {action: ignore, from: "UA_INT64_MIN"}
      - {action: ignore, from: "UA_INT64_MAX"}
      - {action: ignore, from: "UA_UINT64_MIN"}
      - {action: ignore, from: "UA_UINT64_MAX"}
      - {action: ignore, from: "UA_LOGLEVEL"}

    type:
      - {action: replace, from: "_t$"}
      - {action: replace, from: "^Ua"}

    private:
      - {transform: unexport}

    post-global:
      - {action: doc, from: "^Ua_u?int[0-9]+_t"} # types like ogg_uint32_t
      - {action: replace, from: _$}
      - {load: snakecase}

[ianberdin]

I'm trying write simple code by tutorial

[xlab]

@happierall you're doing everything right there.

1. I know the root of issue with functions like UA_Client_readValueAttribute and will fix them tomorrow (no time today).

Can you help with generating bindings for Golang? #967

Ha ha they won't be able to help.

[ianberdin]

With your config some errors:

1. StatusCodeDescription redeclared

2. Unresolved type 'Size'

3. In function 'ByteCopy', unpackPByteString(src): Cannot use src (type *Byte) as type string

4. In function 'SByteCopy', unpackPSByteString(src): Cannot use src (type *Byte) as type string

5. In function 'ClientWriteAccessLevelAttribute', unpackPByteString(newAccessLevel): Cannot use newAccessLevel (type *Byte) as type string

6. In function 'ClientWriteUserAccessLevelAttribute', unpackPByteString(newUserAccessLevel): Cannot use newUserAccessLevel (type *Byte) as type string

7. In function 'ClientWriteEventNotifierAttribute', unpackPByteString(newEventNotifier): Cannot use newEventNotifier (type *Byte) as type string

8. "ua.go:7766:2: unexpected type: ..." Function 'LogStdout', C.UA_Log_Stdout(clevel, ccategory, cmsg)

9. Undefined symbols for architecture x86_64:

   "_UA_Server_addExternalNamespace", referenced from:
   __cgo_05833af092eb_Cfunc_UA_Server_addExternalNamespace in ua.cgo2.o
   (maybe you meant: __cgo_05833af092eb_Cfunc_UA_Server_addExternalNamespace)
   "_UA_Server_call", referenced from:
   __cgo_05833af092eb_Cfunc_UA_Server_call in ua.cgo2.o
   (maybe you meant: __cgo_05833af092eb_Cfunc_UA_Server_call)
   ld: symbol(s) not found for architecture x86_64
   clang: error: linker command failed with exit code 1 (use -v to see invocation)
   

[xlab]

@happierall
Just ignore stuff that doesn't work, especially variadic methods that aren't supported by CGO. Yout can return later and play with tips to make them work.

Undefined symbols for architecture x86_64:

Your header is newer / older than your installed library. Either use appropriate header or ingnore these functions, most users are probably on the older versions anyways.

[ianberdin]

How about this?

/Users/ruslan/Work/playgroundGo/src/ua/cgo_helpers.go:1117[/var/folders/4b/rk93zltj53bcknc45j9yyfzh0000gp/T/gb443523625/ua/_cgo/cgo_helpers.cgo1.go:1281]: ref7a29fd4.builtin undefined (type *_Ctype_struct_UA_DataType has no field or method builtin)
/Users/ruslan/Work/playgroundGo/src/ua/cgo_helpers.go:1121[/var/folders/4b/rk93zltj53bcknc45j9yyfzh0000gp/T/gb443523625/ua/_cgo/cgo_helpers.cgo1.go:1287]: ref7a29fd4.fixedSize undefined (type *_Ctype_struct_UA_DataType has no field or method fixedSize)
/Users/ruslan/Work/playgroundGo/src/ua/cgo_helpers.go:1125[/var/folders/4b/rk93zltj53bcknc45j9yyfzh0000gp/T/gb443523625/ua/_cgo/cgo_helpers.cgo1.go:1293]: ref7a29fd4.overlayable undefined (type *_Ctype_struct_UA_DataType has no field or method overlayable)
/Users/ruslan/Work/playgroundGo/src/ua/cgo_helpers.go:1162[/var/folders/4b/rk93zltj53bcknc45j9yyfzh0000gp/T/gb443523625/ua/_cgo/cgo_helpers.cgo1.go:1339]: x.ref7a29fd4.builtin undefined (type *_Ctype_struct_UA_DataType has no field or method builtin)

[xlab]

@happierall you're using some outdated sources, I managed to eliminate almost all issues from your previous message by getting the latest sources and putting them together

https://github.com/open62541/open62541/releases/download/0.2-rc2/open62541.c
https://github.com/open62541/open62541/releases/download/0.2-rc2/open62541.h

Also, the header has many structs with bitfields and function pointers, so for this library I'd avoid exploring the inner state too much, simply alias types with raw mem tip, and bind only those that are really in use, see example:

  MemTips:
    - {target: "UA_EndpointDescription", self: bind}
    - {target: "UA_Variant", self: bind}
    - {target: "UA_", self: raw}

Also I created this because UA_NumericRangeDimension struct is embedded:

package ua

/*
#include "open62541.h"

typedef struct {
    UA_UInt32 min;
    UA_UInt32 max;
} UA_NumericRangeDimension;
*/
import "C"

type Size C.size_t

type NumericRangeDimension C.UA_NumericRangeDimension

With all that, it compiles fine, having like ~100% functions API coverage.

[ianberdin]

Try compile this:

package main

import (
	"fmt"
	"ua"
)

func main() {
	client := ua.ClientNew(ua.ClientConfigStandard)
	retval := ua.ClientConnect(client, "opc.tcp://localhost:4840")
	if retval != ua.STATUSCODEGOOD {
		ua.ClientDelete(client)
		fmt.Printf("Can't connect. Statuc code: %d", retval)
	}

	var value ua.Variant

	nodeID := ua.NODEIDNUMERIC(0, ua.NS0IDSERVERSERVERSTATUSCURRENTTIME)

	retval = ua.ClientReadValueAttribute(client, nodeID, &value)

	if retval == ua.STATUSCODEGOOD && ua.VariantHasScalarType(&value, &ua.TYPES[ua.TYPESDATETIME]) == ua.Boolean(1) {
		var rawDate ua.DateTime = (ua.DateTime)(value.Data)

		stringDate := ua.DateTimeToString(rawDate)
		fmt.Println(string(stringDate.Data))

		ua.StringDeleteMembers(&stringDate)
	}

	ua.VariantDeleteMembers(&value)
	ua.ClientDelete(client)
}

[xlab]

1. To get around *Byte problems you have to tip it as plain type, also don't forget about PtrTips of function values that are references, not arrays (and vice versa).

  PtrTips:
    function:
      - {target: ^UA_, tips: [ref,ref,ref,ref,ref]}

  TypeTips:
    type:
      - {target: "UA_Byte", self: plain}
      - {target: "UA_SByte", self: plain}

2. Secondly, in your example UA_Variant_hasScalarType is used, but it isn't present in the current API header, find a replacement

3. You need to write a simple getter to fetch data from stringDate, the field is not exported from C

stringDate := ua.DateTimeToString(rawDate)
fmt.Println(string(stringDate.Data))

4. ua.ClientConnect(client, "opc.tcp://localhost:4840") - you must terminate strings with \x00 otherwise you're passing non-NULL terminated strings into C, that's extremely bad.

---

With all above fixed, the example works OK, as far as I could check.

[ianberdin]

Are you use Mac OS?
May be you upload your full config, libraries, helpers?
What version compiler do you use?

[xlab]

ua.zip

[ianberdin]

It can't connect to server :(

fatal error: unexpected signal during runtime execution
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x0]

runtime stack:
runtime.throw(0x41669ff, 0x2a)
/usr/local/go/src/runtime/panic.go:596 +0x95
runtime.sigpanic()
/usr/local/go/src/runtime/signal_unix.go:274 +0x2db

goroutine 1 [syscall, locked to thread]:
runtime.cgocall(0x410d120, 0xc42004de40, 0xc42004dea0)
/usr/local/go/src/runtime/cgocall.go:131 +0xe2 fp=0xc42004de10 sp=0xc42004ddd0
ua._Cfunc_UA_Client_connect(0x4700000, 0x4163b6b, 0x0)
/var/folders/4b/rk93zltj53bcknc45j9yyfzh0000gp/T/gb887722252/ua/_cgo/_cgo_gotypes.go:6721 +0x4d fp=0xc42004de40 sp=0xc42004de10
ua.ClientConnect.func1(0x4700000, 0x4163b6b, 0x0)
/Users/ruslan/Work/playgroundGo/src/ua/ua.go:6514 +0x6a fp=0xc42004de78 sp=0xc42004de40
ua.ClientConnect(0x4700000, 0x4163b6b, 0x19, 0x0)
/Users/ruslan/Work/playgroundGo/src/ua/ua.go:6514 +0x49 fp=0xc42004deb0 sp=0xc42004de78
main.main()
/Users/ruslan/Work/playgroundGo/src/client/main.go:12 +0x79 fp=0xc42004df88 sp=0xc42004deb0
runtime.main()
/usr/local/go/src/runtime/proc.go:185 +0x20a fp=0xc42004dfe0 sp=0xc42004df88
runtime.goexit()
/usr/local/go/src/runtime/asm_amd64.s:2197 +0x1 fp=0xc42004dfe8 sp=0xc42004dfe0

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
/usr/local/go/src/runtime/asm_amd64.s:2197 +0x1

[xlab]

Show the code please

[ianberdin]

package main

import (
	"fmt"

	"github.com/happierall/l"
	"ua"
)

func main() {
	client := ua.ClientNew(ua.ClientConfigStandard)
	retval := ua.ClientConnect(client, "opc.tcp://localhost:4840\x00")
	if retval != ua.STATUSCODEGOOD {
		ua.ClientDelete(client)
		fmt.Printf("Can't connect. Statuc code: %d", retval)
	}

	var value ua.Variant

	nodeID := ua.NODEIDNUMERIC(0, ua.NS0IDSERVERSERVERSTATUSCURRENTTIME)

	retval = ua.ClientReadValueAttribute(client, nodeID, &value)

	//if retval == ua.STATUSCODEGOOD && ua.VariantHasScalarType(&value, &ua.TYPES[ua.TYPESDATETIME]) == ua.Boolean(1) {
		l.Log(value.Data)

		//stringDate := ua.DateTimeToString(rawDate)
		//fmt.Println(string(stringDate.Data))

		//ua.StringDeleteMembers(&stringDate)
	//}

	ua.VariantDeleteMembers(&value)
	ua.ClientDelete(client)
}

[ianberdin]

server.c

#include <signal.h>
#include "lib/open62541.h"

UA_Boolean running = true;
static void stopHandler(int sig) {
    running = false;
}

int main(void) {
    signal(SIGINT, stopHandler);
    signal(SIGTERM, stopHandler);

    UA_ServerConfig config = UA_ServerConfig_standard;
    UA_ServerNetworkLayer nl;
    nl = UA_ServerNetworkLayerTCP(UA_ConnectionConfig_standard, 4840);
    config.networkLayers = &nl;
    config.networkLayersSize = 1;
    UA_Server *server = UA_Server_new(config);

    UA_Server_run(server, &running);
    UA_Server_delete(server);
    nl.deleteMembers(&nl);
    return 0;
}

[xlab]

@happierall
Your code uses wrong config, instead of using empty ua.ClientConfigStandard you should add this into etc.go:

func GetClientConfigStandard() ClientConfig {
	return (ClientConfig)(C.UA_ClientConfig_standard)
}

which will return a handle to static extern variable set to some initialised config. After that your code works, I was able to connect to the server.

P.S. must exit after if retval != ua.STATUSCODEGOOD

[xlab]

Also use value.Deref() after getting any struct value from C, this will map fields.

value.Deref()
str := ua.DateTimeToString(*(*ua.DateTime)(value.Data))
l.Log(str)

->

2017-02-21 08:05:10 example/main.go:33 -> str=ua.String{
    length: 0x1f,
    data:   &ua._Ctype_UA_Byte(0x30),
}

And final string helper:

func (s String) String() string {
	return string((*[1 << 20]byte)(unsafe.Pointer(s.data))[:s.length])
}

->

2017-02-21 08:07:16 example/main.go:33 -> str.String()=02/21/2017 08:07:16.388.867.000

[ianberdin]

I can't connect)

Can't connect. Statuc code: 2147614720

 func main() {
	config := ua.GetClientConfigStandard()
	client := ua.ClientNew(config)
	retval := ua.ClientConnect(client, "opc.tcp://localhost:4840\x00")
	if retval != ua.STATUSCODEGOOD {
		ua.ClientDelete(client)
		l.Logf("Can't connect. Statuc code: %d", retval)
		return
	}
 }

[xlab]

@happierall please see my code again
ua_new.zip

[ianberdin]

Huh it's work. Thank you!

[ianberdin]

ua.NODEIDSTRING must accept []byte, not *byte

Code

var val ua.Variant
ua.VariantInit(&val)
val.Deref()

nodeID := ua.NODEIDSTRING(0, &([]byte("MyVariable")))

retval = ua.ClientReadValueAttribute(client, nodeID, &val)

example usage in C

UPDATE.
May be string, not []byte

[ianberdin]

Full Code

client.go:

package main

import (
	"fmt"
	"runtime"

	"github.com/happierall/l"
	"ua"
)

func main() {
	l.Default.Production = true

	runtime.LockOSThread()
	defer runtime.UnlockOSThread()

	client := ua.ClientNew(ua.GetClientConfigStandard())
	retval := ua.ClientConnect(client, "opc.tcp://0.0.0.0:4840\x00")
	//retval := ua.ClientConnect(client, "opc.tcp://opcuaserver.com:4841/freeopcua/server\x00")
	if retval != ua.STATUSCODEGOOD {
		ua.ClientDelete(client)
		fmt.Printf("Can't connect. Statuc code: %d", retval)
		return
	}

	var value ua.Variant
	ua.VariantInit(&value)
	value.Deref()

	nodeID := ua.NODEIDNUMERIC(0, ua.NS0IDSERVERSERVERSTATUSCURRENTTIME)

	retval = ua.ClientReadValueAttribute(client, nodeID, &value)
	value.Deref()

	//if retval == ua.STATUSCODEGOOD && ua.VariantHasScalarType(&value, &ua.TYPES[ua.TYPESDATETIME]) == ua.Boolean(1) {
	str := ua.DateTimeToString(*(*ua.DateTime)(value.Data))
	l.Log(str.String())
	ua.StringDeleteMembers(&str)
	//}

	var val ua.Variant
	ua.VariantInit(&val)
	val.Deref()

	nodeID2 := ua.NODEIDSTRING(1, "the.answer\x00")
	retval = ua.ClientReadValueAttribute(client, nodeID2, &val)
	val.Deref()

	if retval == ua.STATUSCODEGOOD {
		l.Log("success", retval)

		resultInt32 := *(*ua.Int32)(value.Data)
		l.Log(int(resultInt32))
	} else {
		l.Log("error", retval)
	}

	ua.VariantDeleteMembers(&value)
	ua.ClientDelete(client)
}

server.c

    #include <signal.h>
    #include "open62541.h"

    UA_Boolean running = true;
    static void stopHandler(int sig) {
        running = false;
    }

    int main(void) {
        signal(SIGINT, stopHandler);
        signal(SIGTERM, stopHandler);

        UA_ServerConfig config = UA_ServerConfig_standard;
        UA_ServerNetworkLayer nl;
        nl = UA_ServerNetworkLayerTCP(UA_ConnectionConfig_standard, 4840);
        config.networkLayers = &nl;
        config.networkLayersSize = 1;
        UA_Server *server = UA_Server_new(config);


        /* add a static variable node to the server */
        UA_VariableAttributes myVar;
        UA_VariableAttributes_init(&myVar);
        myVar.description = UA_LOCALIZEDTEXT("en_US", "the answer");
        myVar.displayName = UA_LOCALIZEDTEXT("en_US", "the answer");
        myVar.accessLevel = UA_ACCESSLEVELMASK_READ | UA_ACCESSLEVELMASK_WRITE;
        UA_Int32 myInteger = 42;
        UA_Variant_setScalarCopy(&myVar.value, &myInteger, &UA_TYPES[UA_TYPES_INT32]);
        const UA_QualifiedName myIntegerName = UA_QUALIFIEDNAME(1, "the answer");
        const UA_NodeId myIntegerNodeId = UA_NODEID_STRING(1, "the.answer");
        UA_NodeId parentNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER);
        UA_NodeId parentReferenceNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES);
        UA_Server_addVariableNode(server, myIntegerNodeId, parentNodeId, parentReferenceNodeId,
            myIntegerName, UA_NODEID_NULL, myVar, NULL, NULL);
        UA_Variant_deleteMembers(&myVar.value);


        UA_Server_run(server, &running);
        UA_Server_delete(server);
        nl.deleteMembers(&nl);
        return 0;
    }

[ianberdin]

If change by hand to string, then request is work.
But

	resultInt32 := *(*ua.Int32)(value.Data)
	l.Log(int(resultInt32))

give not 42

[xlab]

@happierall nice progress!

1. Do not edit generated code by hand, check out the docs on PtrTips https://github.com/xlab/c-for-go/wiki/Translator-config-section and use arr instead of ref tip.

resultInt32 := *(*ua.Int32)(value.Data)
	l.Log(int(resultInt32))

looks like a typo, shouldn't be val.Data? Anyway, organize your code, it's hard to understand when and what you're Deref'ing.

[ianberdin]

It's work. I understand about Ptr, thank you.
You are great man.

[ianberdin]

I'm trying make subscription, but all functions doesn't exists.

1. UA_Client_Subscriptions_new (function)
2. UA_SubscriptionSettings_standard (const or struct)
3. UA_Client_Subscriptions_addMonitoredItem (function)
4. UA_Client_Subscriptions_manuallySendPublishRequest (function)

[xlab]

@happierall always check the the source. In header file you have

#ifdef UA_ENABLE_SUBSCRIPTIONS

which should be enabled in generator yaml manifest, also in your CFLAGS when compiling (use #cgo directives, example)

[ianberdin]

Added FlagGroups, but functions still doesn't exists

GENERATOR:
  PackageName: ua
  PackageDescription: "Package ua provides Go bindings for open62541"
  PackageLicense: "THE AUTOGENERATED LICENSE. ALL THE RIGHTS ARE RESERVED BY ROBOTS."
  Includes: ["open62541.h"]
  FlagGroups:
    - {name: "CFLAGS", flags: [
        "-UA_ENABLE_SUBSCRIPTIONS",
    ]}

[ianberdin]

Ah, I'm understand. Added to Parser.Defines too

[ianberdin]

Hm, but can't build...

could not determine kind of name for C.UA_MonitoredItemHandlingFunction
could not determine kind of name for C.UA_SubscriptionSettings

[xlab]

    - {name: "CFLAGS", flags: [
        "-DUA_ENABLE_SUBSCRIPTIONS",
    ]}

[ianberdin]

Magic, thanks :)