Data commit

Task/Use-another-language-to-call-a-function/Python/use-another-language-to-call-a-function-1.py

@@ -0,0 +1,6 @@
+# store this in file rc_embed.py
+# store this in file rc_embed.py
+def query(buffer_length):
+    message = b'Here am I'
+    L = len(message)
+    return message[0:L*(L <= buffer_length)]

Task/Use-another-language-to-call-a-function/Python/use-another-language-to-call-a-function-2.py

@@ -0,0 +1,22 @@
+#if 0
+//I rewrote the driver according to good sense, my style,
+//and discussion --Kernigh 15:45, 12 February 2011 (UTC).
+#endif
+
+#include<stdio.h>
+#include<stdlib.h>
+#include<string.h>
+
+extern int Query(char*,unsigned*);
+
+int main(int argc,char*argv[]) {
+  char Buffer[1024], *pc;
+  unsigned Size = sizeof(Buffer);
+  if (!Query(Buffer,&Size))
+    fputs("Failed to call Query",stdout);
+  else
+    for (pc = Buffer; Size--; ++pc)
+      putchar(*pc);
+  putchar('\n');
+  return EXIT_SUCCESS;
+}

Task/Use-another-language-to-call-a-function/Python/use-another-language-to-call-a-function-3.py

@@ -0,0 +1,60 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<string.h>
+#include<Python.h>
+
+int Query(char*Data,unsigned*Length) {
+  char *module = "rc_embed", *function = "query";
+  PyObject *pName, *pModule, *pFunc, *pResult, *pArgs, *pLength;
+  long result = 0;
+  if (!Py_IsInitialized())
+    Py_Initialize();
+  pName = PyUnicode_FromString(module);
+  pModule = PyImport_Import(pName);
+  Py_DECREF(pName);
+  if (NULL == pModule) {
+    PyErr_Print();
+    fprintf(stderr,"Failed to load \"%s\"\n",module);
+    return 0;
+  }
+  pFunc = PyObject_GetAttrString(pModule,function);
+  if ((NULL == pFunc) || (!PyCallable_Check(pFunc))) {
+    if (PyErr_Occurred())
+      PyErr_Print();
+    fprintf(stderr,"Cannot find function \"%s\"\n",function);
+    if (NULL != pFunc)
+      Py_DECREF(pFunc);
+    Py_DECREF(pModule);
+    return 0;
+  }	
+  pArgs = PyTuple_New(1);
+  pLength = PyLong_FromUnsignedLong((unsigned long)(*Length));
+  if (NULL == pLength) {
+    Py_DECREF(pArgs);
+    Py_DECREF(pFunc);
+    Py_DECREF(pModule);
+    return 0;
+  }
+  PyTuple_SetItem(pArgs,0,pLength);
+  pResult = PyObject_CallObject(pFunc, pArgs);
+  if (NULL == pResult)
+    result = 0;
+  else if (!PyBytes_Check(pResult)) {
+    result = 0;
+    Py_DECREF(pResult);
+  } else {
+    if (! PyBytes_Size(pResult))
+      result = 0;
+    else {
+      *Length = (unsigned)PyBytes_Size(pResult);
+      strncpy(Data,PyBytes_AsString(pResult),*Length);
+      Py_DECREF(pResult);
+      result = 1;
+    }
+  }
+  Py_DECREF(pArgs);
+  Py_DECREF(pFunc);
+  Py_DECREF(pModule);
+  Py_Finalize();
+  return result;
+}

Task/Use-another-language-to-call-a-function/Python/use-another-language-to-call-a-function-4.py

@@ -0,0 +1,12 @@
+$ make main.o
+cc    -c -o main.o main.c
+$ D=$( dirname $( which python3 ) )
+$ gcc $( $D/python3.2-config --cflags ) -c Query.c
+In file included from /usr/include/python3.2mu/Python.h:8:0,
+                 from Q.c:18:
+/usr/include/python3.2mu/pyconfig.h:1173:0: warning: "_POSIX_C_SOURCE" redefined [enabled by default]
+/usr/include/features.h:214:0: note: this is the location of the previous definition
+$ gcc -o main main.o Query.o $( $D/python3.2-config --ldflags )
+$ ./main
+Here am I
+$