ch2-{06|08}: 例子代码

.gitignore

@@ -24,6 +24,8 @@ _obj
 # macOS
 .DS_Store
 
+*.a
+*.lib
 *.so
 *.dll
 *.obj

examples/ch2-06/incorrect-dll-api/Makefile

@@ -0,0 +1,20 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	cd mystring && make
+	go build -o a.out
+	LD_LIBRARY_PATH=$(shell pwd)/mystring ./a.out
+
+macos:
+	cd mystring && make
+	go build -o a.out
+	DYLD_LIBRARY_PATH=$(shell pwd)/mystring ./a.out
+
+windows:
+	# set path
+
+clean:
+	-cd mystring && make clean
+	-rm *.a
+	-rm a.out

examples/ch2-06/incorrect-dll-api/main.go

@@ -0,0 +1,22 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package main
+
+//#cgo CFLAGS: -I./mystring
+//#cgo LDFLAGS: -L${SRCDIR}/mystring -lmystring
+//
+//#include "mystring.h"
+//#include <stdlib.h>
+import "C"
+import (
+	"fmt"
+	"unsafe"
+)
+
+func main() {
+	cs := C.make_string(C.CString("hello"))
+	defer C.free(unsafe.Pointer(cs))
+
+	fmt.Println(C.GoString(cs))
+}

examples/ch2-06/incorrect-dll-api/mystring/Makefile

@@ -0,0 +1,8 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	gcc -shared -o libmystring.so mystring.c
+
+clean:
+	-rm *.so

examples/ch2-06/incorrect-dll-api/mystring/mystring.c

@@ -0,0 +1,26 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+#include "mystring.h"
+
+#include <string.h>
+
+static char buffer[1024];
+
+static char* malloc(int size) {
+	return &buffer[0];
+}
+
+static void free(void* p) {
+	//
+}
+
+char* make_string(const char* s) {
+	char* p = malloc(strlen(s)+1);
+	strcpy(p, s);
+	return p;
+}
+
+void free_string(char* s) {
+	free(s);
+}

examples/ch2-06/incorrect-dll-api/mystring/mystring.h

@@ -0,0 +1,6 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+char* make_string(const char* s);
+
+void free_string(char* s);

examples/ch2-06/make-clib-dll/Makefile

@@ -0,0 +1,20 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	go build -buildmode=c-archive -o number.a
+	gcc -o a.out _test_main.c number.a
+	./a.out
+
+build_on_win64:
+	go build -buildmode=c-archive -o number.a
+	gcc -m64 -shared -o number-win64.dll number-win64.def number.a -Wl,--allow-multiple-definition -static -lstdc++ -lwinmm -lntdll -lWs2_32
+	lib /def:number-win64.def /machine:x64
+
+build_with_vc:
+	cl -o a.out.exe  _test_main.c number-win64.lib
+
+clean:
+	-rm *.a *.lib
+	-rm a.out
+	-rm a.out.exe

examples/ch2-06/make-clib-dll/_test_main.c

@@ -0,0 +1,17 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+#include "number.h"
+
+#include <stdio.h>
+
+int main() {
+	int a = 10;
+	int b = 5;
+	int c = 12;
+
+	int x = number_add_mod(a, b, c);
+	printf("(%d+%d)%%%d = %d\n", a, b, c, x);
+
+	return 0;
+}

examples/ch2-06/make-clib-dll/main.go

@@ -0,0 +1,13 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package main
+
+import "C"
+
+func main() {}
+
+//export number_add_mod
+func number_add_mod(a, b, mod C.int) C.int {
+	return (a + b) % mod
+}

examples/ch2-06/make-clib-dll/number-win64.def

@@ -0,0 +1,4 @@
+LIBRARY number-win64.dll
+
+EXPORTS
+number_add_mod

examples/ch2-06/make-clib-dll/number.h

@@ -0,0 +1,60 @@
+/* Created by "go tool cgo" - DO NOT EDIT. */
+
+/* package github.com/chai2010/advanced-go-programming-book/examples/ch2-06/make-clib-dll */
+
+/* Start of preamble from import "C" comments.  */
+
+
+
+
+/* End of preamble from import "C" comments.  */
+
+
+/* Start of boilerplate cgo prologue.  */
+#line 1 "cgo-gcc-export-header-prolog"
+
+#ifndef GO_CGO_PROLOGUE_H
+#define GO_CGO_PROLOGUE_H
+
+typedef signed char GoInt8;
+typedef unsigned char GoUint8;
+typedef short GoInt16;
+typedef unsigned short GoUint16;
+typedef int GoInt32;
+typedef unsigned int GoUint32;
+typedef long long GoInt64;
+typedef unsigned long long GoUint64;
+typedef GoInt64 GoInt;
+typedef GoUint64 GoUint;
+typedef __SIZE_TYPE__ GoUintptr;
+typedef float GoFloat32;
+typedef double GoFloat64;
+typedef float _Complex GoComplex64;
+typedef double _Complex GoComplex128;
+
+/*
+  static assertion to make sure the file is being used on architecture
+  at least with matching size of GoInt.
+*/
+typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ? 1:-1];
+
+typedef struct { const char *p; GoInt n; } GoString;
+typedef void *GoMap;
+typedef void *GoChan;
+typedef struct { void *t; void *v; } GoInterface;
+typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
+
+#endif
+
+/* End of boilerplate cgo prologue.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern int number_add_mod(int p0, int p1, int p2);
+
+#ifdef __cplusplus
+}
+#endif

examples/ch2-06/make-clib-from-multi-pkg/Makefile

@@ -0,0 +1,12 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	go build -buildmode=c-archive -o main.a
+	gcc -o a.out _test_main.c main.a
+	./a.out
+
+clean:
+	-rm *.a *.lib
+	-rm a.out
+	-rm a.out.exe

examples/ch2-06/make-clib-from-multi-pkg/_test_main.c

@@ -0,0 +1,19 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+#include "main.h"
+#include "./number/number.h"
+
+#include <stdio.h>
+
+int main() {
+	int a = 10;
+	int b = 5;
+	int c = 12;
+
+	int x = number_add_mod(a, b, c);
+	printf("(%d+%d)%%%d = %d\n", a, b, c, x);
+
+	goPrintln("done");
+	return 0;
+}

examples/ch2-06/make-clib-from-multi-pkg/main.go

@@ -0,0 +1,21 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package main
+
+import "C"
+
+import (
+	"fmt"
+
+	_ "github.com/chai2010/advanced-go-programming-book/examples/ch2-06/make-clib-from-multi-pkg/number"
+)
+
+func main() {
+	println("Done")
+}
+
+//export goPrintln
+func goPrintln(s *C.char) {
+	fmt.Println("goPrintln:", C.GoString(s))
+}

examples/ch2-06/make-clib-from-multi-pkg/main.h

@@ -0,0 +1,60 @@
+/* Created by "go tool cgo" - DO NOT EDIT. */
+
+/* package github.com/chai2010/advanced-go-programming-book/examples/ch2-06/make-clib-from-multi-pkg */
+
+/* Start of preamble from import "C" comments.  */
+
+
+
+
+/* End of preamble from import "C" comments.  */
+
+
+/* Start of boilerplate cgo prologue.  */
+#line 1 "cgo-gcc-export-header-prolog"
+
+#ifndef GO_CGO_PROLOGUE_H
+#define GO_CGO_PROLOGUE_H
+
+typedef signed char GoInt8;
+typedef unsigned char GoUint8;
+typedef short GoInt16;
+typedef unsigned short GoUint16;
+typedef int GoInt32;
+typedef unsigned int GoUint32;
+typedef long long GoInt64;
+typedef unsigned long long GoUint64;
+typedef GoInt64 GoInt;
+typedef GoUint64 GoUint;
+typedef __SIZE_TYPE__ GoUintptr;
+typedef float GoFloat32;
+typedef double GoFloat64;
+typedef float _Complex GoComplex64;
+typedef double _Complex GoComplex128;
+
+/*
+  static assertion to make sure the file is being used on architecture
+  at least with matching size of GoInt.
+*/
+typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ? 1:-1];
+
+typedef struct { const char *p; GoInt n; } GoString;
+typedef void *GoMap;
+typedef void *GoChan;
+typedef struct { void *t; void *v; } GoInterface;
+typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
+
+#endif
+
+/* End of boilerplate cgo prologue.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern void goPrintln(char* p0);
+
+#ifdef __cplusplus
+}
+#endif

examples/ch2-06/make-clib-from-multi-pkg/number/number.go

@@ -0,0 +1,11 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package number
+
+import "C"
+
+//export number_add_mod
+func number_add_mod(a, b, mod C.int) C.int {
+	return (a + b) % mod
+}

examples/ch2-06/make-clib-from-multi-pkg/number/number.h

@@ -0,0 +1 @@
+int number_add_mod(int a, int b, int mod);

examples/ch2-06/make-clib-shared/Makefile

@@ -0,0 +1,11 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	go build -buildmode=c-shared -o number.so
+	gcc -o a.out _test_main.c number.so
+	./a.out
+
+clean:
+	-rm *.a
+	-rm a.out

examples/ch2-06/make-clib-shared/_test_main.c

@@ -0,0 +1,17 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+#include "number.h"
+
+#include <stdio.h>
+
+int main() {
+	int a = 10;
+	int b = 5;
+	int c = 12;
+
+	int x = number_add_mod(a, b, c);
+	printf("(%d+%d)%%%d = %d\n", a, b, c, x);
+
+	return 0;
+}

examples/ch2-06/make-clib-shared/main.go

@@ -0,0 +1,13 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package main
+
+import "C"
+
+func main() {}
+
+//export number_add_mod
+func number_add_mod(a, b, mod C.int) C.int {
+	return (a + b) % mod
+}

examples/ch2-06/make-clib-shared/number.h

@@ -0,0 +1,60 @@
+/* Created by "go tool cgo" - DO NOT EDIT. */
+
+/* package github.com/chai2010/advanced-go-programming-book/examples/ch2-06/make-clib-shared */
+
+/* Start of preamble from import "C" comments.  */
+
+
+
+
+/* End of preamble from import "C" comments.  */
+
+
+/* Start of boilerplate cgo prologue.  */
+#line 1 "cgo-gcc-export-header-prolog"
+
+#ifndef GO_CGO_PROLOGUE_H
+#define GO_CGO_PROLOGUE_H
+
+typedef signed char GoInt8;
+typedef unsigned char GoUint8;
+typedef short GoInt16;
+typedef unsigned short GoUint16;
+typedef int GoInt32;
+typedef unsigned int GoUint32;
+typedef long long GoInt64;
+typedef unsigned long long GoUint64;
+typedef GoInt64 GoInt;
+typedef GoUint64 GoUint;
+typedef __SIZE_TYPE__ GoUintptr;
+typedef float GoFloat32;
+typedef double GoFloat64;
+typedef float _Complex GoComplex64;
+typedef double _Complex GoComplex128;
+
+/*
+  static assertion to make sure the file is being used on architecture
+  at least with matching size of GoInt.
+*/
+typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ? 1:-1];
+
+typedef struct { const char *p; GoInt n; } GoString;
+typedef void *GoMap;
+typedef void *GoChan;
+typedef struct { void *t; void *v; } GoInterface;
+typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
+
+#endif
+
+/* End of boilerplate cgo prologue.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern int number_add_mod(int p0, int p1, int p2);
+
+#ifdef __cplusplus
+}
+#endif

examples/ch2-06/make-clib-static/Makefile

@@ -0,0 +1,11 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	go build -buildmode=c-archive -o number.a
+	gcc -o a.out _test_main.c number.a
+	./a.out
+
+clean:
+	-rm *.a
+	-rm a.out

examples/ch2-06/make-clib-static/_test_main.c

@@ -0,0 +1,17 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+#include "number.h"
+
+#include <stdio.h>
+
+int main() {
+	int a = 10;
+	int b = 5;
+	int c = 12;
+
+	int x = number_add_mod(a, b, c);
+	printf("(%d+%d)%%%d = %d\n", a, b, c, x);
+
+	return 0;
+}

examples/ch2-06/make-clib-static/main.go

@@ -0,0 +1,13 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package main
+
+import "C"
+
+func main() {}
+
+//export number_add_mod
+func number_add_mod(a, b, mod C.int) C.int {
+	return (a + b) % mod
+}

examples/ch2-06/make-clib-static/number.h

@@ -0,0 +1,60 @@
+/* Created by "go tool cgo" - DO NOT EDIT. */
+
+/* package github.com/chai2010/advanced-go-programming-book/examples/ch2-06/use-clib-static */
+
+/* Start of preamble from import "C" comments.  */
+
+
+
+
+/* End of preamble from import "C" comments.  */
+
+
+/* Start of boilerplate cgo prologue.  */
+#line 1 "cgo-gcc-export-header-prolog"
+
+#ifndef GO_CGO_PROLOGUE_H
+#define GO_CGO_PROLOGUE_H
+
+typedef signed char GoInt8;
+typedef unsigned char GoUint8;
+typedef short GoInt16;
+typedef unsigned short GoUint16;
+typedef int GoInt32;
+typedef unsigned int GoUint32;
+typedef long long GoInt64;
+typedef unsigned long long GoUint64;
+typedef GoInt64 GoInt;
+typedef GoUint64 GoUint;
+typedef __SIZE_TYPE__ GoUintptr;
+typedef float GoFloat32;
+typedef double GoFloat64;
+typedef float _Complex GoComplex64;
+typedef double _Complex GoComplex128;
+
+/*
+  static assertion to make sure the file is being used on architecture
+  at least with matching size of GoInt.
+*/
+typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ? 1:-1];
+
+typedef struct { const char *p; GoInt n; } GoString;
+typedef void *GoMap;
+typedef void *GoChan;
+typedef struct { void *t; void *v; } GoInterface;
+typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
+
+#endif
+
+/* End of boilerplate cgo prologue.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+extern int number_add_mod(int p0, int p1, int p2);
+
+#ifdef __cplusplus
+}
+#endif

examples/ch2-06/plugin/Makefile

@@ -0,0 +1,8 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	go build -buildmode=plugin plugin.go -o plugin.so
+
+clean:
+	-rm *.so

examples/ch2-06/plugin/main.go

@@ -0,0 +1,23 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package main
+
+import "plugin"
+
+func main() {
+	p, err := plugin.Open("plugin.so")
+	if err != nil {
+		panic(err)
+	}
+	v, err := p.Lookup("V")
+	if err != nil {
+		panic(err)
+	}
+	f, err := p.Lookup("F")
+	if err != nil {
+		panic(err)
+	}
+	*v.(*int) = 7
+	f.(func())() // prints "Hello, number 7"
+}

examples/ch2-06/plugin/plugin.go

@@ -0,0 +1,15 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+// +build ignore
+// +build go1.10
+
+package main
+
+import "fmt"
+
+func main()
+
+var V int
+
+func F() { fmt.Printf("Hello, number %d\n", V) }

examples/ch2-06/use-clib-shared/Makefile

@@ -0,0 +1,20 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	cd number && make
+	go build -o a.out
+	LD_LIBRARY_PATH=$(shell pwd)/number ./a.out
+
+macos:
+	cd number && make
+	go build -o a.out
+	DYLD_LIBRARY_PATH=$(shell pwd)/number ./a.out
+
+windows:
+	# set path
+
+clean:
+	-cd number && make clean
+	-rm *.a
+	-rm a.out

examples/ch2-06/use-clib-shared/main.go

@@ -0,0 +1,15 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package main
+
+//#cgo CFLAGS: -I./number
+//#cgo LDFLAGS: -L${SRCDIR}/number -lnumber
+//
+//#include "number.h"
+import "C"
+import "fmt"
+
+func main() {
+	fmt.Println(C.number_add_mod(10, 5, 12))
+}

examples/ch2-06/use-clib-shared/number/Makefile

@@ -0,0 +1,8 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	gcc -shared -o libnumber.so number.c
+
+clean:
+	-rm *.so

examples/ch2-06/use-clib-shared/number/number.c

@@ -0,0 +1,5 @@
+#include "number.h"
+
+int number_add_mod(int a, int b, int mod) {
+	return (a+b)%mod;
+}

examples/ch2-06/use-clib-shared/number/number.h

@@ -0,0 +1 @@
+int number_add_mod(int a, int b, int mod);

examples/ch2-06/use-clib-static-v1/Makefile

@@ -0,0 +1,11 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	cd number && make
+	go run main.go
+
+clean:
+	-cd number && make clean
+	-rm *.a
+	-rm a.out

examples/ch2-06/use-clib-static-v1/main.go

@@ -0,0 +1,15 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package main
+
+//#cgo CFLAGS: -I./number
+//#cgo LDFLAGS: -L${SRCDIR}/number -lnumber
+//
+//#include "number.h"
+import "C"
+import "fmt"
+
+func main() {
+	fmt.Println(C.number_add_mod(10, 5, 12))
+}

examples/ch2-06/use-clib-static-v1/number/Makefile

@@ -0,0 +1,10 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	gcc -c -o number.o number.c
+	ar rcs libnumber.a number.o
+	-rm *.o
+
+clean:
+	-rm *.a *.o

examples/ch2-06/use-clib-static-v1/number/number.c

@@ -0,0 +1,5 @@
+#include "number.h"
+
+int number_add_mod(int a, int b, int mod) {
+	return (a+b)%mod;
+}

examples/ch2-06/use-clib-static-v1/number/number.h

@@ -0,0 +1 @@
+int number_add_mod(int a, int b, int mod);

examples/ch2-06/use-clib-static-v2/Makefile

@@ -0,0 +1,9 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	go build -o a.out
+	./a.out
+
+clean:
+	-rm a.out

examples/ch2-06/use-clib-static-v2/main.go

@@ -0,0 +1,13 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package main
+
+//#cgo CFLAGS: -I./number
+//#include "number.h"
+import "C"
+import "fmt"
+
+func main() {
+	fmt.Println(C.number_add_mod(10, 5, 12))
+}

examples/ch2-06/use-clib-static-v2/number/Makefile

@@ -0,0 +1,10 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	gcc -c -o number.o number.c
+	ar rcs libnumber.a number.o
+	-rm *.o
+
+clean:
+	-rm *.a *.o

examples/ch2-06/use-clib-static-v2/number/number.c

@@ -0,0 +1,5 @@
+#include "number.h"
+
+int number_add_mod(int a, int b, int mod) {
+	return (a+b)%mod;
+}

examples/ch2-06/use-clib-static-v2/number/number.h

@@ -0,0 +1 @@
+int number_add_mod(int a, int b, int mod);

examples/ch2-06/use-clib-static-v2/z_link_number_c.c

@@ -0,0 +1,4 @@
+// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+#include "./number/number.c"

examples/ch2-08/hello-swig-v1/Makefile

@@ -0,0 +1,8 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+default:
+	go run runme.go
+
+clean:
+	-rm a.out

examples/ch2-08/hello-swig-v1/hello.cc

@@ -0,0 +1,8 @@
+// Copyright © 2016 ChaiShushan (chaishushan{AT}gmail.com).
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+#include <iostream>
+
+void SayHello() {
+	std::cout << "Hello, World!" << std::endl;
+}

examples/ch2-08/hello-swig-v1/hello.swigcxx

@@ -0,0 +1,8 @@
+// Copyright © 2016 ChaiShushan (chaishushan{AT}gmail.com).
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+%module hello
+
+%inline %{
+extern void SayHello();
+%}

examples/ch2-08/hello-swig-v1/hello_test.go

@@ -0,0 +1,12 @@
+// Copyright © 2016 ChaiShushan (chaishushan{AT}gmail.com).
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+package hello
+
+import (
+	"testing"
+)
+
+func TestSayHello(t *testing.T) {
+	SayHello()
+}

examples/ch2-08/hello-swig-v1/runme.go

@@ -0,0 +1,14 @@
+// Copyright © 2016 ChaiShushan (chaishushan{AT}gmail.com).
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+// +build ignore
+
+package main
+
+import (
+	hello "."
+)
+
+func main() {
+	hello.SayHello()
+}

examples/ch2-08/hello-swig-v2/Makefile

@@ -0,0 +1,11 @@
+# Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
+# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+# use go generate
+
+default:
+	swig -go -cgo -intgosize 64 -o swig_wrap.cc hello.i
+	go run runme.go
+
+clean:
+	-rm a.out

examples/ch2-08/hello-swig-v2/hello.cc

@@ -0,0 +1,8 @@
+// Copyright © 2016 ChaiShushan (chaishushan{AT}gmail.com).
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+#include <iostream>
+
+void SayHello() {
+	std::cout << "Hello, World!" << std::endl;
+}

examples/ch2-08/hello-swig-v2/hello.go

@@ -0,0 +1,73 @@
+/* ----------------------------------------------------------------------------
+ * This file was automatically generated by SWIG (http://www.swig.org).
+ * Version 3.0.12
+ *
+ * This file is not intended to be easily readable and contains a number of
+ * coding conventions designed to improve portability and efficiency. Do not make
+ * changes to this file unless you know what you are doing--modify the SWIG
+ * interface file instead.
+ * ----------------------------------------------------------------------------- */
+
+// source: hello.i
+
+package hello
+
+/*
+#define intgo swig_intgo
+typedef void *swig_voidp;
+
+#include <stdint.h>
+
+
+typedef long long intgo;
+typedef unsigned long long uintgo;
+
+
+
+typedef struct { char *p; intgo n; } _gostring_;
+typedef struct { void* array; intgo len; intgo cap; } _goslice_;
+
+
+extern void _wrap_Swig_free_hello_679051ef4cde42b8(uintptr_t arg1);
+extern uintptr_t _wrap_Swig_malloc_hello_679051ef4cde42b8(swig_intgo arg1);
+extern void _wrap_SayHello_hello_679051ef4cde42b8(void);
+#undef intgo
+*/
+import "C"
+
+import "unsafe"
+import _ "runtime/cgo"
+import "sync"
+
+
+type _ unsafe.Pointer
+
+
+
+var Swig_escape_always_false bool
+var Swig_escape_val interface{}
+
+
+type _swig_fnptr *byte
+type _swig_memberptr *byte
+
+
+type _ sync.Mutex
+
+func Swig_free(arg1 uintptr) {
+	_swig_i_0 := arg1
+	C._wrap_Swig_free_hello_679051ef4cde42b8(C.uintptr_t(_swig_i_0))
+}
+
+func Swig_malloc(arg1 int) (_swig_ret uintptr) {
+	var swig_r uintptr
+	_swig_i_0 := arg1
+	swig_r = (uintptr)(C._wrap_Swig_malloc_hello_679051ef4cde42b8(C.swig_intgo(_swig_i_0)))
+	return swig_r
+}
+
+func SayHello() {
+	C._wrap_SayHello_hello_679051ef4cde42b8()
+}
+
+

examples/ch2-08/hello-swig-v2/hello.i

@@ -0,0 +1,9 @@
+// Copyright © 2016 ChaiShushan (chaishushan{AT}gmail.com).
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+%module hello
+
+%inline %{
+extern void SayHello();
+%}
+

examples/ch2-08/hello-swig-v2/runme.go

@@ -0,0 +1,14 @@
+// Copyright © 2016 ChaiShushan (chaishushan{AT}gmail.com).
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+
+// +build ignore
+
+package main
+
+import (
+	hello "."
+)
+
+func main() {
+	hello.SayHello()
+}

examples/ch2-08/hello-swig-v2/swig_wrap.cc

@@ -0,0 +1,257 @@
+/* ----------------------------------------------------------------------------
+ * This file was automatically generated by SWIG (http://www.swig.org).
+ * Version 3.0.12
+ *
+ * This file is not intended to be easily readable and contains a number of
+ * coding conventions designed to improve portability and efficiency. Do not make
+ * changes to this file unless you know what you are doing--modify the SWIG
+ * interface file instead.
+ * ----------------------------------------------------------------------------- */
+
+/* source: hello.i */
+
+#define SWIGMODULE hello
+/* -----------------------------------------------------------------------------
+ *  This section contains generic SWIG labels for method/variable
+ *  declarations/attributes, and other compiler dependent labels.
+ * ----------------------------------------------------------------------------- */
+
+/* template workaround for compilers that cannot correctly implement the C++ standard */
+#ifndef SWIGTEMPLATEDISAMBIGUATOR
+# if defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x560)
+#  define SWIGTEMPLATEDISAMBIGUATOR template
+# elif defined(__HP_aCC)
+/* Needed even with `aCC -AA' when `aCC -V' reports HP ANSI C++ B3910B A.03.55 */
+/* If we find a maximum version that requires this, the test would be __HP_aCC <= 35500 for A.03.55 */
+#  define SWIGTEMPLATEDISAMBIGUATOR template
+# else
+#  define SWIGTEMPLATEDISAMBIGUATOR
+# endif
+#endif
+
+/* inline attribute */
+#ifndef SWIGINLINE
+# if defined(__cplusplus) || (defined(__GNUC__) && !defined(__STRICT_ANSI__))
+#   define SWIGINLINE inline
+# else
+#   define SWIGINLINE
+# endif
+#endif
+
+/* attribute recognised by some compilers to avoid 'unused' warnings */
+#ifndef SWIGUNUSED
+# if defined(__GNUC__)
+#   if !(defined(__cplusplus)) || (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
+#     define SWIGUNUSED __attribute__ ((__unused__))
+#   else
+#     define SWIGUNUSED
+#   endif
+# elif defined(__ICC)
+#   define SWIGUNUSED __attribute__ ((__unused__))
+# else
+#   define SWIGUNUSED
+# endif
+#endif
+
+#ifndef SWIG_MSC_UNSUPPRESS_4505
+# if defined(_MSC_VER)
+#   pragma warning(disable : 4505) /* unreferenced local function has been removed */
+# endif
+#endif
+
+#ifndef SWIGUNUSEDPARM
+# ifdef __cplusplus
+#   define SWIGUNUSEDPARM(p)
+# else
+#   define SWIGUNUSEDPARM(p) p SWIGUNUSED
+# endif
+#endif
+
+/* internal SWIG method */
+#ifndef SWIGINTERN
+# define SWIGINTERN static SWIGUNUSED
+#endif
+
+/* internal inline SWIG method */
+#ifndef SWIGINTERNINLINE
+# define SWIGINTERNINLINE SWIGINTERN SWIGINLINE
+#endif
+
+/* exporting methods */
+#if defined(__GNUC__)
+#  if (__GNUC__ >= 4) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
+#    ifndef GCC_HASCLASSVISIBILITY
+#      define GCC_HASCLASSVISIBILITY
+#    endif
+#  endif
+#endif
+
+#ifndef SWIGEXPORT
+# if defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+#   if defined(STATIC_LINKED)
+#     define SWIGEXPORT
+#   else
+#     define SWIGEXPORT __declspec(dllexport)
+#   endif
+# else
+#   if defined(__GNUC__) && defined(GCC_HASCLASSVISIBILITY)
+#     define SWIGEXPORT __attribute__ ((visibility("default")))
+#   else
+#     define SWIGEXPORT
+#   endif
+# endif
+#endif
+
+/* calling conventions for Windows */
+#ifndef SWIGSTDCALL
+# if defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+#   define SWIGSTDCALL __stdcall
+# else
+#   define SWIGSTDCALL
+# endif
+#endif
+
+/* Deal with Microsoft's attempt at deprecating C standard runtime functions */
+#if !defined(SWIG_NO_CRT_SECURE_NO_DEPRECATE) && defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE)
+# define _CRT_SECURE_NO_DEPRECATE
+#endif
+
+/* Deal with Microsoft's attempt at deprecating methods in the standard C++ library */
+#if !defined(SWIG_NO_SCL_SECURE_NO_DEPRECATE) && defined(_MSC_VER) && !defined(_SCL_SECURE_NO_DEPRECATE)
+# define _SCL_SECURE_NO_DEPRECATE
+#endif
+
+/* Deal with Apple's deprecated 'AssertMacros.h' from Carbon-framework */
+#if defined(__APPLE__) && !defined(__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES)
+# define __ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES 0
+#endif
+
+/* Intel's compiler complains if a variable which was never initialised is
+ * cast to void, which is a common idiom which we use to indicate that we
+ * are aware a variable isn't used.  So we just silence that warning.
+ * See: https://github.com/swig/swig/issues/192 for more discussion.
+ */
+#ifdef __INTEL_COMPILER
+# pragma warning disable 592
+#endif
+
+
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+
+
+typedef long long intgo;
+typedef unsigned long long uintgo;
+
+
+# if !defined(__clang__) && (defined(__i386__) || defined(__x86_64__))
+#   define SWIGSTRUCTPACKED __attribute__((__packed__, __gcc_struct__))
+# else
+#   define SWIGSTRUCTPACKED __attribute__((__packed__))
+# endif
+
+
+
+typedef struct { char *p; intgo n; } _gostring_;
+typedef struct { void* array; intgo len; intgo cap; } _goslice_;
+
+
+
+
+#define swiggo_size_assert_eq(x, y, name) typedef char name[(x-y)*(x-y)*-2+1];
+#define swiggo_size_assert(t, n) swiggo_size_assert_eq(sizeof(t), n, swiggo_sizeof_##t##_is_not_##n)
+
+swiggo_size_assert(char, 1)
+swiggo_size_assert(short, 2)
+swiggo_size_assert(int, 4)
+typedef long long swiggo_long_long;
+swiggo_size_assert(swiggo_long_long, 8)
+swiggo_size_assert(float, 4)
+swiggo_size_assert(double, 8)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+extern void crosscall2(void (*fn)(void *, int), void *, int);
+extern char* _cgo_topofstack(void) __attribute__ ((weak));
+extern void _cgo_allocate(void *, int);
+extern void _cgo_panic(void *, int);
+#ifdef __cplusplus
+}
+#endif
+
+static char *_swig_topofstack() {
+  if (_cgo_topofstack) {
+    return _cgo_topofstack();
+  } else {
+    return 0;
+  }
+}
+
+static void _swig_gopanic(const char *p) {
+  struct {
+    const char *p;
+  } SWIGSTRUCTPACKED a;
+  a.p = p;
+  crosscall2(_cgo_panic, &a, (int) sizeof a);
+}
+
+
+
+
+#define SWIG_contract_assert(expr, msg) \
+  if (!(expr)) { _swig_gopanic(msg); } else
+
+
+static void Swig_free(void* p) {
+  free(p);
+}
+
+static void* Swig_malloc(int c) {
+  return malloc(c);
+}
+
+
+extern void SayHello();
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void _wrap_Swig_free_hello_679051ef4cde42b8(void *_swig_go_0) {
+  void *arg1 = (void *) 0 ;
+  
+  arg1 = *(void **)&_swig_go_0; 
+  
+  Swig_free(arg1);
+  
+}
+
+
+void *_wrap_Swig_malloc_hello_679051ef4cde42b8(intgo _swig_go_0) {
+  int arg1 ;
+  void *result = 0 ;
+  void *_swig_go_result;
+  
+  arg1 = (int)_swig_go_0; 
+  
+  result = (void *)Swig_malloc(arg1);
+  *(void **)&_swig_go_result = (void *)result; 
+  return _swig_go_result;
+}
+
+
+void _wrap_SayHello_hello_679051ef4cde42b8() {
+  SayHello();
+  
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+