C++ PyBytes_AsString函数代码示例

/* Given a string buffer containing Python source code, compile it
   and return a code object as a new reference. */
static PyObject *
compile_source(PyObject *pathname, PyObject *source)
{
    PyObject *code, *fixed_source;

    fixed_source = normalize_line_endings(source);
    if (fixed_source == NULL) {
        return NULL;
    }

    code = Py_CompileStringObject(PyBytes_AsString(fixed_source),
                                  pathname, Py_file_input, NULL, -1);

    Py_DECREF(fixed_source);
    return code;
}

int
PyCode_Addr2Line(PyCodeObject *co, int addrq)
{
    Py_ssize_t size = PyBytes_Size(co->co_lnotab) / 2;
    unsigned char *p = (unsigned char*)PyBytes_AsString(co->co_lnotab);
    int line = co->co_firstlineno;
    int addr = 0;
    while (--size >= 0) {
        addr += *p++;
        if (addr > addrq)
            break;
        line += (signed char)*p;
        p++;
    }
    return line;
}

static int
conv_pyobj_reg(PyObject *pyobj, unsigned long *reg)
{
#ifdef IS_PY3K
    if (PyLong_Check(pyobj)) {
#else
    if (PyLong_Check(pyobj) || PyInt_Check(pyobj)) {
#endif
        *reg = PyLong_AsUnsignedLong(pyobj);
    }
    else if (PyBool_Check(pyobj)) {
        *reg = (pyobj == Py_True) ? 1 : 0;
    }
    else if (PyBytes_Check(pyobj)) {
        *reg = (unsigned long)PyBytes_AsString(pyobj);
    }
    else {
        PyErr_SetString(PyExc_TypeError, "argument should be unsigned long, bool or bytes");
        return 0;
    }

    if (PyErr_Occurred()) {
        return 0;
    }

    return 1;
}

static int
build_regs(PyObject *args[NUM_REGS], regs_t *regs)
{
    unsigned long *regarray[NUM_REGS] = {&regs->rax, &regs->rbx, &regs->rcx, &regs->rdx, &regs->rsi, &regs->rdi};

    memset(regs, 0, sizeof(*regs));

    int i;
    for (i = 0; i < NUM_REGS; i++) {
        if (args[i] == NULL) {
            continue;
        }
        else if (!conv_pyobj_reg(args[i], regarray[i])) {
            return 0;
        }
    }

    return 1;
}

static inline void
pyobj2doc_pair(PyObject *key, PyObject *value, rapidjson::Document& doc)
{
    const char *key_string;
#ifdef PY3
    PyObject *utf8_item;
    utf8_item = PyUnicode_AsUTF8String(key);
    key_string = PyBytes_AsString(utf8_item);
#else
    key_string = PyString_AsString(key);
#endif
    rapidjson::Value s;
    s.SetString(key_string, doc.GetAllocator());
    rapidjson::Value _v;
    pyobj2doc(value, _v, doc);
    doc.AddMember(s, _v, doc.GetAllocator());
}

//-------------------------------------------------------------------------------------
std::string Pickler::pickle(PyObject* pyobj, int8 protocol)
{
	PyObject* pyRet = PyObject_CallFunction(picklerMethod_, 
		const_cast<char*>("(Oi)"), pyobj, protocol);
	
	SCRIPT_ERROR_CHECK();
	
	if(pyRet)
	{
		std::string str;
		str.assign(PyBytes_AsString(pyRet), PyBytes_Size(pyRet));
		S_RELEASE(pyRet);
		return str;
	}
	
	return "";
}

//-------------------------------------------------------------------------------------
void TelnetHandler::processPythonCommand(std::string command)
{
	if(pTelnetServer_->pScript() == NULL || command.size() == 0)
		return;
	
	command += "\n";
	PyObject* pycmd = PyUnicode_DecodeUTF8(command.data(), command.size(), NULL);
	if(pycmd == NULL)
	{
		SCRIPT_ERROR_CHECK();
		return;
	}

	DEBUG_MSG(fmt::format("TelnetHandler::processPythonCommand: size({}), command={}.\n", 
		command.size(), command));

	std::string retbuf = "";
	PyObject* pycmd1 = PyUnicode_AsEncodedString(pycmd, "utf-8", NULL);

	pTelnetServer_->pScript()->run_simpleString(PyBytes_AsString(pycmd1), &retbuf);

	// 把返回值中的'\n'替換成'\r\n'，以解决在vt100终端中显示不正确的问题
	std::string::size_type pos = 0;
	while ((pos = retbuf.find('\n', pos)) != std::string::npos)
	{
		if (retbuf[pos - 1] != '\r')
		{
			retbuf.insert(pos, "\r");
			pos++;
		}
		pos++;
	}

	if(retbuf.size() > 0)
	{
		// 将结果返回给客户端
		Network::Bundle* pBundle = Network::Bundle::createPoolObject();
		(*pBundle) << retbuf;
		pEndPoint_->send(pBundle);
		Network::Bundle::reclaimPoolObject(pBundle);
		sendEnter();
	}

	Py_DECREF(pycmd);
	Py_DECREF(pycmd1);
}

RPM_GNUC_NORETURN
static void die(PyObject *cb)
{
    char *pyfn = NULL;
    PyObject *r;

    if (PyErr_Occurred()) {
	PyErr_Print();
    }
    if ((r = PyObject_Repr(cb)) != NULL) { 
	pyfn = PyBytes_AsString(r);
    }
    fprintf(stderr, _("error: python callback %s failed, aborting!\n"), 
	    	      pyfn ? pyfn : "???");
    rpmdbCheckTerminate(1);
    exit(EXIT_FAILURE);
}

// The Python simpleEnc function.
static PyObject *simpleEnc_encode(PyObject *self, PyObject *args) {

    PyBytesObject *srcObj;
    uint8_t *src;
    int srcSize;
    int pos;
    uint32_t numBytes;
    uint32_t matchPos;

    if (!PyArg_ParseTuple(args, "Oi", &srcObj, &pos))
        return NULL;

    src = (uint8_t *) PyBytes_AsString((PyObject*) srcObj);
    srcSize = PySequence_Length((PyObject*) srcObj);
    numBytes = simpleEnc(src, srcSize, pos, &matchPos);
    return Py_BuildValue("ii", numBytes, matchPos);
}

PyObject *
getitem(_MetadataLocationObject *self, PyObject *pykey)
{
    char *key, *value;

    if (check_MetadataLocationStatus(self))
        return NULL;

    if (!PyUnicode_Check(pykey) && !PyBytes_Check(pykey)) {
        PyErr_SetString(PyExc_TypeError, "Unicode or bytes expected!");
        return NULL;
    }

    if (PyUnicode_Check(pykey)) {
        pykey = PyUnicode_AsUTF8String(pykey);
    }

    key = PyBytes_AsString(pykey);

    value = NULL;

    if (!strcmp(key, "primary")) {
        value = self->ml->pri_xml_href;
    } else if (!strcmp(key, "filelists")) {
        value = self->ml->fil_xml_href;
    } else if (!strcmp(key, "other")) {
        value = self->ml->oth_xml_href;
    } else if (!strcmp(key, "primary_db")) {
        value = self->ml->pri_sqlite_href;
    } else if (!strcmp(key, "filelists_db")) {
        value = self->ml->fil_sqlite_href;
    } else if (!strcmp(key, "other_db")) {
        value = self->ml->oth_sqlite_href;
    } else if (!strcmp(key, "group")) {
        value = self->ml->groupfile_href;
    } else if (!strcmp(key, "group_gz")) {
        value = self->ml->cgroupfile_href;
    } else if (!strcmp(key, "updateinfo")) {
        value = self->ml->updateinfo_href;
    }

    if (value)
        return PyUnicode_FromString(value);
    else
        Py_RETURN_NONE;
}

static PyObject *
read_history_file(PyObject *self, PyObject *args)
{
    PyObject *filename_obj = Py_None, *filename_bytes;
    if (!PyArg_ParseTuple(args, "|O:read_history_file", &filename_obj))
        return NULL;
    if (filename_obj != Py_None) {
        if (!PyUnicode_FSConverter(filename_obj, &filename_bytes))
            return NULL;
        errno = read_history(PyBytes_AsString(filename_bytes));
        Py_DECREF(filename_bytes);
    } else
        errno = read_history(NULL);
    if (errno)
        return PyErr_SetFromErrno(PyExc_IOError);
    Py_RETURN_NONE;
}

char *GetCharFromDict(PyObject * dict, const char *key)
{
	PyObject *o, *o2 = NULL;
	char *ps = NULL, *result = NULL;
	size_t length;

	o = PyDict_GetItemString(dict, key);
	if (o == NULL) {
		PyErr_Format(PyExc_ValueError, "Missing key in dictionary: %s",
			     key);
		return NULL;
	}

	if (PyUnicode_Check(o)) {
		o2 = PyUnicode_AsASCIIString(o);
		if (o2 == NULL) {
			return NULL;
		}
		ps = PyBytes_AsString(o2);
	}
#if PY_MAJOR_VERSION < 3
	else if (PyString_Check(o)) {
		ps = PyString_AsString(o);
	}
#endif


	if (ps == NULL) {
		PyErr_Format(PyExc_ValueError,
			     "Can not get string value for key %s", key);
		goto out;
	}
	length = strlen(ps) + 1;
	result = (char *)malloc(length);
	if (result == NULL) {
		PyErr_Format(PyExc_ValueError, "Failed to allocate memory!");
		goto out;
	}
	memcpy(result, ps, length);

out:
	if (o2 != NULL) {
		Py_DECREF(o2);
	}
	return result;
}

PyObject *
Index__find(Index *self, PyObject *py_path)
{
    char *path;
    size_t idx;
    int err;

    path = PyBytes_AsString(py_path);
    if (!path)
        return NULL;

    err = git_index_find(&idx, self->index, path);
    if (err < 0)
        return Error_set_str(err, path);

    return PyLong_FromSize_t(idx);
}

const gchar *
_py_get_callable_name(PyObject *callable, gchar *buf, gsize buf_len)
{
  PyObject *name = PyObject_GetAttrString(callable, "__name__");

  if (name)
    {
      g_strlcpy(buf, PyBytes_AsString(name), buf_len);
    }
  else
    {
      PyErr_Clear();
      g_strlcpy(buf, "<unknown>", buf_len);
    }
  Py_XDECREF(name);
  return buf;
}

static PyObject *
patches(PyObject *self, PyObject *args)
{
	PyObject *text, *bins, *result;
	struct flist *patch;
	const char *in;
	char *out;
	Py_ssize_t len, outlen, inlen;

	if (!PyArg_ParseTuple(args, "OO:mpatch", &text, &bins))
		return NULL;

	len = PyList_Size(bins);
	if (!len) {
		/* nothing to do */
		Py_INCREF(text);
		return text;
	}

	if (PyObject_AsCharBuffer(text, &in, &inlen))
		return NULL;

	patch = fold(bins, 0, len);
	if (!patch)
		return NULL;

	outlen = calcsize(inlen, patch);
	if (outlen < 0) {
		result = NULL;
		goto cleanup;
	}
	result = PyBytes_FromStringAndSize(NULL, outlen);
	if (!result) {
		result = NULL;
		goto cleanup;
	}
	out = PyBytes_AsString(result);
	if (!apply(out, in, inlen, patch)) {
		Py_DECREF(result);
		result = NULL;
	}
cleanup:
	lfree(patch);
	return result;
}

static PyObject *
trie_has_prefix(trieobject *mp, PyObject *py_prefix)
{
    const char *prefix;
    int has_prefix;
#ifdef IS_PY3K
    PyObject* bytes;
#endif

    /* Make sure prefix is a string. */
#ifdef IS_PY3K
    if(!PyUnicode_Check(py_prefix)) {
#else
    if(!PyString_Check(py_prefix)) {
#endif
        PyErr_SetString(PyExc_TypeError, "prefix must be a string");
        return NULL;
    }
#ifdef IS_PY3K
    bytes = PyUnicode_AsASCIIString(py_prefix);
    if(!bytes) {
        PyErr_SetString(PyExc_TypeError, "prefix must be an ASCII string");
        return NULL;
    }
    prefix = PyBytes_AsString(bytes);
#else
    prefix = PyString_AS_STRING(py_prefix);
#endif
    has_prefix = Trie_has_prefix(mp->trie, prefix);
#ifdef IS_PY3K
    Py_DECREF(bytes);
    return PyLong_FromLong((long)has_prefix);
#else
    return PyInt_FromLong((long)has_prefix);
#endif
}

static PyObject *
trie_has_prefix_onearg(trieobject *mp, PyObject *py_args)
{
    PyObject *py_arg;
    if(!PyArg_ParseTuple(py_args, "O", &py_arg))
        return NULL;
    return trie_has_prefix(mp, py_arg);
}