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ch2-07: 改进例子

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chai2010 2018-01-12 01:25:38 +08:00
parent 23d419d3d2
commit d7850c2d87
4 changed files with 76 additions and 73 deletions
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12
examples/ch2-07/hello-py/Makefile
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@ -2,14 +2,10 @@
# License: https://creativecommons.org/licenses/by-nc-sa/4.0/
default:
go build -buildmode=c-shared -o gopkg.so main.go
python3 -c 'import gopkg; print(gopkg.system("time"))'
python3 -c 'import gopkg; print(gopkg.sum(2, 3))'
go build -o py3-config.out py3-config.go
PKG_CONFIG=./py3-config.out go build -buildmode=c-shared -o gopkg.so main.go
-rm py3-config.out
python3 -c 'import gopkg; print(gopkg.sum(1, 2))'
clean:
-rm *.so
# PKG_CONFIG=python3-config go build -buildmode=c-shared -o say-hello.so main.go
# python3-config --ldflags
# python3-config --include

39
examples/ch2-07/hello-py/gopkg.h
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@ -5,12 +5,9 @@
/* Start of preamble from import "C" comments. */
#line 3 "/Users/chai/go/src/github.com/chai2010/advanced-go-programming-book/examples/ch2-07/hello-py/main.go"
#line 6 "/Users/chai/go/src/github.com/chai2010/advanced-go-programming-book/examples/ch2-07/hello-py/main.go"
// macOS:
// python3-config --cflags
// python3-config --ldflags
// linux
@ -22,30 +19,22 @@
#define Py_LIMITED_API
#include <Python.h>
static PyObject *
spam_system(PyObject *self, PyObject *args) {
const char *command;
if (!PyArg_ParseTuple(args, "s", &command)) {
return NULL;
extern PyObject* PyInit_gopkg();
extern PyObject* Py_gopkg_sum(PyObject *, PyObject *);
static int cgo_PyArg_ParseTuple_ii(PyObject *arg, int *a, int *b) {
return PyArg_ParseTuple(arg, "ii", a, b);
}
int status = system(command);
return PyLong_FromLong(status);
}
extern PyObject *sum(PyObject *self, PyObject *args);
static PyMethodDef modMethods[] = {
{"system", spam_system, METH_VARARGS, "Execute a shell command."},
{"sum", sum, METH_VARARGS, "Execute a shell command."},
{NULL, NULL, 0, NULL}
static PyObject* cgo_PyInit_gopkg(void) {
static PyMethodDef methods[] = {
{"sum", Py_gopkg_sum, METH_VARARGS, "Add two numbers."},
{NULL, NULL, 0, NULL},
};
static PyObject* PyInit_gopkg_(void) {
static struct PyModuleDef module = {
PyModuleDef_HEAD_INIT, "gopkg", NULL, -1, modMethods,
PyModuleDef_HEAD_INIT, "gopkg", NULL, -1, methods,
};
return (void*)PyModule_Create(&module);
return PyModule_Create(&module);
}
#line 1 "cgo-generated-wrapper"
@ -97,10 +86,10 @@ extern "C" {
#endif
extern PyObject* sum(PyObject* p0, PyObject* p1);
extern PyObject* PyInit_gopkg();
extern PyObject* Py_gopkg_sum(PyObject* p0, PyObject* p1);
#ifdef __cplusplus
}
#endif

60
examples/ch2-07/hello-py/main.go
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@ -5,10 +5,7 @@ package main
/*
// macOS:
// python3-config --cflags
// python3-config --ldflags
#cgo darwin CFLAGS: -I/Library/Frameworks/Python.framework/Versions/3.6/include/python3.6m -I/Library/Frameworks/Python.framework/Versions/3.6/include/python3.6m -fno-strict-aliasing -Wsign-compare -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -g
#cgo darwin LDFLAGS: -L/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/config-3.6m-darwin -lpython3.6m -ldl -framework CoreFoundation
#cgo darwin pkg-config: python3
// linux
#cgo linux pkg-config: python3
@ -19,51 +16,38 @@ package main
#define Py_LIMITED_API
#include <Python.h>
static PyObject *
spam_system(PyObject *self, PyObject *args) {
const char *command;
if (!PyArg_ParseTuple(args, "s", &command)) {
return NULL;
extern PyObject* PyInit_gopkg();
extern PyObject* Py_gopkg_sum(PyObject *, PyObject *);
static int cgo_PyArg_ParseTuple_ii(PyObject *arg, int *a, int *b) {
return PyArg_ParseTuple(arg, "ii", a, b);
}
int status = system(command);
return PyLong_FromLong(status);
}
extern PyObject *sum(PyObject *self, PyObject *args);
static PyMethodDef modMethods[] = {
{"system", spam_system, METH_VARARGS, "Execute a shell command."},
{"sum", sum, METH_VARARGS, "Execute a shell command."},
{NULL, NULL, 0, NULL}
static PyObject* cgo_PyInit_gopkg(void) {
static PyMethodDef methods[] = {
{"sum", Py_gopkg_sum, METH_VARARGS, "Add two numbers."},
{NULL, NULL, 0, NULL},
};
static PyObject* PyInit_gopkg_(void) {
static struct PyModuleDef module = {
PyModuleDef_HEAD_INIT, "gopkg", NULL, -1, modMethods,
PyModuleDef_HEAD_INIT, "gopkg", NULL, -1, methods,
};
return (void*)PyModule_Create(&module);
return PyModule_Create(&module);
}
*/
import "C"
import (
"fmt"
)
func main() {}
// export SayHello
func SayHello(name *C.char) {
fmt.Printf("hello %s!\n", C.GoString(name))
}
//export sum
func sum(self, args *C.PyObject) *C.PyObject {
return C.PyLong_FromLongLong(9527) // TODO
}
//export PyInit_gopkg
func PyInit_gopkg() *C.PyObject {
return C.PyInit_gopkg_()
return C.cgo_PyInit_gopkg()
}
//export Py_gopkg_sum
func Py_gopkg_sum(self, args *C.PyObject) *C.PyObject {
var a, b C.int
if C.cgo_PyArg_ParseTuple_ii(args, &a, &b) == 0 {
return nil
}
return C.PyLong_FromLong(C.long(a + b))
}

34
examples/ch2-07/hello-py/py3-config.go Normal file
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@ -0,0 +1,34 @@
// Copyright © 2017 ChaiShushan <chaishushan{AT}gmail.com>.
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
// +build ignore
// +build darwin
// fix python3-config for cgo build
package main
import (
"bytes"
"fmt"
"os"
"os/exec"
)
func main() {
for _, s := range os.Args {
if s == "--cflags" {
out, _ := exec.Command("python3-config", "--cflags").CombinedOutput()
out = bytes.Replace(out, []byte("-arch"), []byte{}, -1)
out = bytes.Replace(out, []byte("i386"), []byte{}, -1)
out = bytes.Replace(out, []byte("x86_64"), []byte{}, -1)
fmt.Print(string(out))
return
}
if s == "--libs" {
out, _ := exec.Command("python3-config", "--ldflags").CombinedOutput()
fmt.Print(string(out))
return
}
}
}