diff --git a/src/common/graph/stub/Makefile b/src/common/graph/stub/Makefile
new file mode 100644
index 00000000..832adcd5
--- /dev/null
+++ b/src/common/graph/stub/Makefile
@@ -0,0 +1,6 @@
+inc_path := $(shell pwd)/inc/external/
+out_path := $(shell pwd)/out/atc/lib64/stub/
+stub_path := $(shell pwd)/common/graph/stub/
+
+mkdir_stub := $(shell mkdir -p $(out_path))
+graph_local_stub := $(shell $(HI_PYTHON) $(stub_path)/gen_stubapi.py $(inc_path) $(out_path))
diff --git a/src/common/graph/stub/gen_stubapi.py b/src/common/graph/stub/gen_stubapi.py
new file mode 100644
index 00000000..6185c479
--- /dev/null
+++ b/src/common/graph/stub/gen_stubapi.py
@@ -0,0 +1,573 @@
+import os
+import re
+import sys
+import logging
+
+logging.basicConfig(stream=sys.stdout, format='[%(asctime)s] [%(lineno)s] %(levelname)s: %(message)s',
+                    level=logging.INFO)
+
+"""
+    this attr is used for symbol table visible
+"""
+GE_ATTR = 'GE_FUNC_DEV_VISIBILITY GE_FUNC_HOST_VISIBILITY'
+
+"""
+    generate stub func body by return type
+"""
+RETURN_STATEMENTS = {
+    'graphStatus': '    return GRAPH_SUCCESS;',
+    'Status': '    return SUCCESS;',
+    'Graph': '    return Graph();',
+    'Graph&': '    return *this;',
+    'Format': '    return Format();',
+    'Format&': '    return *this;',
+    'Shape': '    return Shape();',
+    'Shape&': '    return *this;',
+    'TensorDesc': '    return TensorDesc();',
+    'TensorDesc&': '    return *this;',
+    'Tensor': '    return Tensor();',
+    'Tensor&': '    return *this;',
+    'Operator': '    return Operator();',
+    'Operator&': '    return *this;',
+    'Ptr': '    return nullptr;',
+    'std::string': '    return "";',
+    'std::string&': '    return "";',
+    'string': ' return "";',
+    'int': '    return 0;',
+    'DataType': '    return DT_FLOAT;',
+    'InferenceContextPtr': '    return nullptr;',
+    'SubgraphBuilder': '    return nullptr;',
+    'OperatorImplPtr': '    return nullptr;',
+    'OutHandler': '    return nullptr;',
+    'std::vector<std::string>': '    return {};',
+    'std::vector<int64_t>': '    return {};',
+    'std::map': '    return {};',
+    'uint32_t': '    return 0;',
+    'int64_t': '    return 0;',
+    'uint64_t': '    return 0;',
+    'size_t': '    return 0;',
+    'float': '    return 0.0f;',
+    'bool': '    return false;',
+}
+
+"""
+    max code len per line in hua_wei software programming specifications
+"""
+max_code_len_per_line = 100
+
+"""
+    white_list_for_debug, include_dir_key_words is to
+    determines which header files to generate cc files from
+    when DEBUG on
+"""
+white_list_for_debug = ["operator.h", "tensor.h",
+                        "graph.h", "operator_factory.h",
+                        "ge_ir_build.h"]
+include_dir_key_words = ["ge", "graph"]
+DEBUG = True
+
+
+def need_generate_func(func_line):
+    """
+    :param func_line:
+    :return:
+    """
+    if func_line.strip().endswith("default") or func_line.strip().endswith("delete") \
+            or func_line.strip().startswith("typedef") or func_line.strip().startswith("using"):
+        return False
+    return True
+
+
+def file_endswith_white_list_suffix(file):
+    """
+    :param file:
+    :return:
+    """
+    if DEBUG:
+        for suffix in white_list_for_debug:
+            if file.endswith(suffix):
+                return True
+        return False
+    else:
+        return True
+
+
+"""
+    belows are patterns used for analyse .h file
+"""
+# pattern function
+pattern_func = re.compile(r"""(^[\s]*)          #leading with space,we will find and delete after
+([a-zA-Z~_]            # void int likely
+.*
+[)]                     #we find )
+(?!.*{)                 # we do not want the case int abc() const { return 1;}
+.*)
+(;.*)                   #we want to find ; and after for we will replace these later
+\n$
+""", re.VERBOSE | re.MULTILINE | re.DOTALL)
+
+# pattern comment
+pattern_comment = re.compile(r'^\s*//')
+pattern_comment_2_start = re.compile(r'^\s*/[*]')
+pattern_comment_2_end = re.compile(r'[*]/\s*$')
+# pattern define
+pattern_define = re.compile(r'^\s*#define')
+pattern_define_return = re.compile(r'\\\s*$')
+# blank line
+pattern_blank_line = re.compile(r'^\s*$')
+# virtual,explicit,friend,static
+pattern_keyword = re.compile(r'(virtual\s+|explicit\s+|friend\s+|static\s+)')
+# lead space
+pattern_leading_space = re.compile(r'(^[\s]*)[a-zA-Z~_]')
+# functions will have patterns such as func ( or func(
+# but operator is an exception; the class name is preceded by an operator, and the above mode does not exist
+# format like :"operator = ()"
+pattern_func_name = re.compile(r'([a-zA-Z0-9~_\-]+\s*|operator?.*)[(]')
+# template
+pattern_template = re.compile(r'^\s*template')
+pattern_template_end = re.compile(r'>\s*$')
+# namespace
+pattern_namespace = re.compile(r'namespace.*{')
+# class : which can handle classA a and {not on the same line, but if found ';' after class,then don't deal with
+pattern_class = re.compile(r'^[\s]*(class|struct)\s+(%s\s+)?([a-zA-Z0-9_\-]+<?)(?!.*;)' % GE_ATTR)
+# {}
+pattern_start = re.compile('{')
+pattern_end = re.compile('}')
+
+line_index = 0
+
+
+class H2CC(object):
+    def __init__(self, input_file, output_file, shared_includes_content):
+        """
+        :param input_file:
+        :param output_file:
+        :param shared_includes_content:
+        """
+        self.input_file = input_file
+        self.output_file = output_file
+        self.shared_includes_content = shared_includes_content
+        self.line_index = 0
+        self.input_fd = open(self.input_file, 'r')
+        self.input_content = self.input_fd.readlines()
+        self.output_fd = open(self.output_file, 'w')
+
+        # The state may be normal_now(in the middle of {}),class_now,namespace_now
+        self.stack = []
+        self.stack_class = []
+        self.stack_template = []
+        # record funcs generated by h2cc func
+        self.func_list_exist = []
+
+    def __del__(self):
+        self.input_fd.close()
+        self.output_fd.close()
+        del self.stack
+        del self.stack_class
+        del self.stack_template
+        del self.func_list_exist
+
+    def just_skip(self):
+        # skip blank line or comment
+        if pattern_blank_line.search(self.input_content[self.line_index]) or pattern_comment.search(
+                self.input_content[self.line_index]):  # /n or comment using //
+            self.line_index += 1
+        if pattern_comment_2_start.search(self.input_content[self.line_index]):  # comment using /*
+            while not pattern_comment_2_end.search(self.input_content[self.line_index]):  # */
+                self.line_index += 1
+            self.line_index += 1
+        # skip define
+        if pattern_define.search(self.input_content[self.line_index]):
+            while pattern_blank_line.search(self.input_content[self.line_index]) or pattern_define_return.search(
+                    self.input_content[self.line_index]):
+                self.line_index += 1
+            self.line_index += 1
+
+    def write_inc_content(self):
+        for shared_include_content in self.shared_includes_content:
+            self.output_fd.write(shared_include_content)
+
+    def h2cc(self):
+        """
+        :return:
+        """
+        logging.info("start generate cc_file[%s] from h_file[%s]", self.output_file, self.input_file)
+        global pattern_comment
+        global pattern_comment_2_start
+        global pattern_comment_2_end
+        global pattern_blank_line
+        global pattern_func
+        global pattern_keyword
+        global pattern_leading_space
+        global pattern_func_name
+        global pattern_template
+        global pattern_template_end
+        global pattern_namespace
+        global pattern_class
+        global pattern_start
+        global pattern_end
+        global line_index
+        # write inc content
+        self.write_inc_content()
+        # core processing cycle, process the input .h file by line
+        while self.line_index < len(self.input_content):
+            # handle comment and blank line
+            self.just_skip()
+
+            # match namespace
+            self.handle_namespace()
+
+            # match template
+            template_string = self.handle_template()
+            # match class
+            line = self.input_content[self.line_index]
+            match_class = pattern_class.search(line)
+            match_start = pattern_start.search(line)
+            handle_class_result = self.handle_class(template_string, line, match_start, match_class)
+            if handle_class_result == "continue":
+                continue
+
+            # match "}"
+            handle_stack_result = self.handle_stack(match_start)
+            if handle_stack_result == "continue":
+                continue
+            # handle func
+            handle_func1_result, line, start_i = self.handle_func1(line)
+            if handle_func1_result == "continue":
+                continue
+
+            # here means func is found
+            # delete key word
+            line = pattern_keyword.sub('', line)
+            logging.info("line[%s]", line)
+
+            # Class member function
+            # if friend we will not add class name
+            friend_match = re.search('friend ', line)
+            if len(self.stack_class) > 0 and not friend_match:
+                line, func_name = self.handle_class_member_func(line, template_string)
+            # Normal functions
+            else:
+                line, func_name = self.handle_normal_func(line, template_string)
+
+            need_generate = need_generate_func(line)
+            # func body
+            line += self.implement_function(line)
+            # comment
+            line = self.gen_comment(start_i) + line
+            # write to out file
+            self.write_func_content(line, func_name, need_generate)
+            # next loop
+            self.line_index += 1
+
+        logging.info('Added %s functions', len(self.func_list_exist))
+        logging.info('Successfully converted,please see ' + self.output_file)
+
+    def handle_func1(self, line):
+        """
+        :param line:
+        :return:
+        """
+        find1 = re.search('[(]', line)
+        if not find1:
+            self.line_index += 1
+            return "continue", line, None
+        find2 = re.search('[)]', line)
+        start_i = self.line_index
+        space_match = pattern_leading_space.search(line)
+        # deal with
+        # int abc(int a,
+        #        int b)
+        if find1 and (not find2):
+            self.line_index += 1
+            line2 = self.input_content[self.line_index]
+            if space_match:
+                line2 = re.sub('^' + space_match.group(1), '', line2)
+            line += line2
+            while self.line_index < len(self.input_content) and (not re.search('[)]', line2)):
+                self.line_index += 1
+                line2 = self.input_content[self.line_index]
+                line2 = re.sub('^' + space_match.group(1), '', line2)
+                line += line2
+
+        match_start = pattern_start.search(self.input_content[self.line_index])
+        match_end = pattern_end.search(self.input_content[self.line_index])
+        if match_start:  # like  ) {  or ) {}    int the last line
+            if not match_end:
+                self.stack.append('normal_now')
+            ii = start_i
+            while ii <= self.line_index:
+                ii += 1
+            self.line_index += 1
+            return "continue", line, start_i
+        logging.info("line[%s]", line)
+        # '  int abc();'->'int abc()'
+        (line, match) = pattern_func.subn(r'\2\n', line)
+        logging.info("line[%s]", line)
+        # deal with case:
+        # 'int \n abc(int a, int b)'
+        if re.search(r'^\s*(inline)?\s*[a-zA-Z0-9_]+\s*$', self.input_content[start_i - 1]):
+            line = self.input_content[start_i - 1] + line
+        line = line.lstrip()
+        if not match:
+            self.line_index += 1
+            return "continue", line, start_i
+        return "pass", line, start_i
+
+    def handle_stack(self, match_start):
+        """
+        :param match_start:
+        :return:
+        """
+        line = self.input_content[self.line_index]
+        match_end = pattern_end.search(line)
+        if match_start:
+            self.stack.append('normal_now')
+        if match_end:
+            top_status = self.stack.pop()
+            if top_status == 'namespace_now':
+                self.output_fd.write(line + '\n')
+            elif top_status == 'class_now':
+                self.stack_class.pop()
+                self.stack_template.pop()
+        if match_start or match_end:
+            self.line_index += 1
+            return "continue"
+
+        if len(self.stack) > 0 and self.stack[-1] == 'normal_now':
+            self.line_index += 1
+            return "continue"
+        return "pass"
+
+    def handle_class(self, template_string, line, match_start, match_class):
+        """
+        :param template_string:
+        :param line:
+        :param match_start:
+        :param match_class:
+        :return:
+        """
+        if match_class:  # we face a class
+            self.stack_template.append(template_string)
+            self.stack.append('class_now')
+            class_name = match_class.group(3)
+
+            # class template specializations: class A<u,Node<u> >
+            if '<' in class_name:
+                k = line.index('<')
+                fit = 1
+                for ii in range(k + 1, len(line)):
+                    if line[ii] == '<':
+                        fit += 1
+                    if line[ii] == '>':
+                        fit -= 1
+                    if fit == 0:
+                        break
+                class_name += line[k + 1:ii + 1]
+            logging.info('class_name[%s]', class_name)
+            self.stack_class.append(class_name)
+            while not match_start:
+                self.line_index += 1
+                line = self.input_content[self.line_index]
+                match_start = pattern_start.search(line)
+            self.line_index += 1
+            return "continue"
+        return "pass"
+
+    def handle_template(self):
+        line = self.input_content[self.line_index]
+        match_template = pattern_template.search(line)
+        template_string = ''
+        if match_template:
+            match_template_end = pattern_template_end.search(line)
+            template_string = line
+            while not match_template_end:
+                self.line_index += 1
+                line = self.input_content[self.line_index]
+                template_string += line
+                match_template_end = pattern_template_end.search(line)
+            self.line_index += 1
+        return template_string
+
+    def handle_namespace(self):
+        line = self.input_content[self.line_index]
+        match_namespace = pattern_namespace.search(line)
+        if match_namespace:  # we face namespace
+            self.output_fd.write(line + '\n')
+            self.stack.append('namespace_now')
+            self.line_index += 1
+
+    def handle_normal_func(self, line, template_string):
+        template_line = ''
+        self.stack_template.append(template_string)
+        if self.stack_template[-1] != '':
+            template_line = re.sub(r'\s*template', 'template', self.stack_template[-1])
+            # change '< class T = a, class U = A(3)>' to '<class T, class U>'
+            template_line = re.sub(r'\s*=.*>(\s*)$', r'>\1', template_line)
+            template_line = re.sub(r'\s*=.*,', ',', template_line)
+            template_line = re.sub(r'\s*=.*', '', template_line)
+        line = re.sub(r'\s*=.*,', ',', line)
+        line = re.sub(r'\s*=.*\)', ')', line)
+        line = template_line + line
+        self.stack_template.pop()
+        func_name = re.search(r'^.*\)', line, re.MULTILINE | re.DOTALL).group()
+        logging.info("line[%s]", line)
+        logging.info("func_name[%s]", func_name)
+        return line, func_name
+
+    def handle_class_member_func(self, line, template_string):
+        template_line = ''
+        x = ''
+        if template_string != '':
+            template_string = re.sub(r'\s*template', 'template', template_string)
+            template_string = re.sub(r'\s*=.*>(\s*)$', r'>\1', template_string)
+            template_string = re.sub(r'\s*=.*,', ',', template_string)
+            template_string = re.sub(r'\s*=.*', '', template_string)
+        if self.stack_template[-1] != '':
+            if not (re.search(r'<\s*>', stack_template[-1])):
+                template_line = re.sub(r'^\s*template', 'template', stack_template[-1])
+                if not (re.search(r'<.*>', self.stack_class[-1])):
+                    # for x we get like template<class T, typename U> -> <T,U>
+                    x = re.sub(r'template\s*<', '<', template_line)  # remove template -> <class T, typename U>
+                    x = re.sub(r'\n', '', x)
+                    x = re.sub(r'\s*=.*,', ',', x)
+                    x = re.sub(r'\s*=.*\>', '>', x)
+                    x = x.rstrip()  # remove \n
+                    x = re.sub(r'(class|typename)\s+|(<class>|<typename>\s*class)', '',
+                               x)  # remove class,typename ->  <T, U>
+                    x = re.sub(r'<\s+', '<', x)
+                    x = re.sub(r'\s+>', '>', x)
+                    x = re.sub(r'\s+,', ',', x)
+                    x = re.sub(r',\s+', ', ', x)
+        line = re.sub(r'\s*=\s+0', '', line)
+        line = re.sub(r'\s*=\s+.*,', ',', line)
+        line = re.sub(r'\s*=\s+.*\)', ')', line)
+        logging.info("x[%s]\nline[%s]", x, line)
+        # if the function is long, void ABC::foo()
+        # breaks into two lines void ABC::\n foo()
+        temp_line = pattern_func_name.sub(self.stack_class[-1] + x + '::' + r'\1(', line, count=1)
+        if len(temp_line) > max_code_len_per_line:
+            line = pattern_func_name.sub(self.stack_class[-1] + x + '::\n' + r'\1(', line, count=1)
+        else:
+            line = temp_line
+        logging.info("line[%s]", line)
+        # add template as the above if there is one
+        template_line = re.sub(r'\s*=.*>(\s*)$', r'>\1', template_line)
+        template_line = re.sub(r'\s*=.*,', ',', template_line)
+        template_line = re.sub(r'\s*=.*', '', template_line)
+        line = template_line + template_string + line
+        func_name = re.search(r'^.*\)', line, re.MULTILINE | re.DOTALL).group()
+        logging.info("line[%s]", line)
+        logging.info("func_name[%s]", func_name)
+        return line, func_name
+
+    def write_func_content(self, content, func_name, need_generate):
+        if not (func_name in self.func_list_exist) and need_generate:
+            self.output_fd.write(content)
+            self.func_list_exist.append(func_name)
+            logging.info('add func:[%s]', func_name)
+
+    def gen_comment(self, start_i):
+        comment_line = ''
+        # Function comments are on top of function declarations, copy them over
+        k = start_i - 1  # one line before this func start
+        if pattern_template.search(self.input_content[k]):
+            k -= 1
+        if pattern_comment_2_end.search(self.input_content[k]):
+            comment_line = self.input_content[k].lstrip()
+            while not pattern_comment_2_start.search(self.input_content[k]):
+                k -= 1
+                comment_line = self.input_content[k].lstrip() + comment_line
+        else:
+            for j in range(k, 0, -1):
+                c_line = self.input_content[j]
+                if pattern_comment.search(c_line):
+                    c_line = re.sub(r'\s*//', '//', c_line)
+                    comment_line = c_line + comment_line
+                else:
+                    break
+        return comment_line
+
+    @staticmethod
+    def implement_function(func):
+        function_def = ''
+        function_def += '{\n'
+
+        all_items = func.split()
+        start = 0
+        return_type = all_items[start]
+        if return_type == "const":
+            start += 1
+            return_type = all_items[start]
+        if return_type.startswith(('std::map', 'std::set', 'std::vector')):
+            return_type = "std::map"
+        if return_type.endswith('*') or (len(all_items) > start + 1 and all_items[start + 1].startswith('*')):
+            return_type = "Ptr"
+        if len(all_items) > start + 1 and all_items[start + 1].startswith('&'):
+            return_type += "&"
+        if RETURN_STATEMENTS.__contains__(return_type):
+            function_def += RETURN_STATEMENTS[return_type]
+        else:
+            logging.warning("Unhandled return type[%s]", return_type)
+
+        function_def += '\n'
+        function_def += '}\n'
+        function_def += '\n'
+        return function_def
+
+
+def collect_header_files(path):
+    """
+    :param path:
+    :return:
+    """
+    header_files = []
+    shared_includes_content = []
+    for root, dirs, files in os.walk(path):
+        files.sort()
+        for file in files:
+            if file.find("git") >= 0:
+                continue
+            if not file.endswith('.h'):
+                continue
+            file_path = os.path.join(root, file)
+            file_path = file_path.replace('\\', '/')
+            header_files.append(file_path)
+            include_str = '#include "{}"\n'.format(file_path[path.rindex('/') + 1:])
+            shared_includes_content.append(include_str)
+    return header_files, shared_includes_content
+
+
+def generate_stub_file(inc_dir, out_cc_dir):
+    """
+    :param inc_dir:
+    :param out_cc_dir:
+    :return:
+    """
+    target_header_files, shared_includes_content = collect_header_files(inc_dir)
+    for header_file in target_header_files:
+        if not file_endswith_white_list_suffix(header_file):
+            continue
+        cc_file = re.sub('.h*$', '.cc', header_file)
+        h_2_cc = H2CC(header_file, out_cc_dir + cc_file[cc_file.rindex('/') + 1:], shared_includes_content)
+        h_2_cc.h2cc()
+
+
+def gen_code(inc_dir, out_cc_dir):
+    """
+    :param inc_dir:
+    :param out_cc_dir:
+    :return:
+    """
+    if not inc_dir.endswith('/'):
+        inc_dir += '/'
+    if not out_cc_dir.endswith('/'):
+        out_cc_dir += '/'
+    for include_dir_key_word in include_dir_key_words:
+        generate_stub_file(inc_dir + include_dir_key_word, out_cc_dir)
+
+
+if __name__ == '__main__':
+    inc_dir = sys.argv[1]
+    out_cc_dir = sys.argv[2]
+    gen_code(inc_dir, out_cc_dir)
diff --git a/src/ge/stub/Makefile b/src/ge/stub/Makefile
new file mode 100644
index 00000000..a0b35b42
--- /dev/null
+++ b/src/ge/stub/Makefile
@@ -0,0 +1,6 @@
+inc_path := $(shell pwd)/inc/external/
+out_path := $(shell pwd)/out/atc/lib64/stub/
+stub_path := $(shell pwd)/framework/domi/stub/
+
+mkdir_stub := $(shell mkdir -p $(out_path))
+local_stub := $(shell $(HI_PYTHON) $(stub_path)/gen_stubapi.py $(inc_path) $(out_path))
diff --git a/src/ge/stub/README b/src/ge/stub/README
new file mode 100644
index 00000000..ca98ce85
--- /dev/null
+++ b/src/ge/stub/README
@@ -0,0 +1,4 @@
+###################################################################################
+the directory (stub) saves the stub file
+gen_stubapi.py is using for retrieving API and generating stub functions
+###################################################################################
diff --git a/src/ge/stub/gen_stubapi.py b/src/ge/stub/gen_stubapi.py
new file mode 100644
index 00000000..6185c479
--- /dev/null
+++ b/src/ge/stub/gen_stubapi.py
@@ -0,0 +1,573 @@
+import os
+import re
+import sys
+import logging
+
+logging.basicConfig(stream=sys.stdout, format='[%(asctime)s] [%(lineno)s] %(levelname)s: %(message)s',
+                    level=logging.INFO)
+
+"""
+    this attr is used for symbol table visible
+"""
+GE_ATTR = 'GE_FUNC_DEV_VISIBILITY GE_FUNC_HOST_VISIBILITY'
+
+"""
+    generate stub func body by return type
+"""
+RETURN_STATEMENTS = {
+    'graphStatus': '    return GRAPH_SUCCESS;',
+    'Status': '    return SUCCESS;',
+    'Graph': '    return Graph();',
+    'Graph&': '    return *this;',
+    'Format': '    return Format();',
+    'Format&': '    return *this;',
+    'Shape': '    return Shape();',
+    'Shape&': '    return *this;',
+    'TensorDesc': '    return TensorDesc();',
+    'TensorDesc&': '    return *this;',
+    'Tensor': '    return Tensor();',
+    'Tensor&': '    return *this;',
+    'Operator': '    return Operator();',
+    'Operator&': '    return *this;',
+    'Ptr': '    return nullptr;',
+    'std::string': '    return "";',
+    'std::string&': '    return "";',
+    'string': ' return "";',
+    'int': '    return 0;',
+    'DataType': '    return DT_FLOAT;',
+    'InferenceContextPtr': '    return nullptr;',
+    'SubgraphBuilder': '    return nullptr;',
+    'OperatorImplPtr': '    return nullptr;',
+    'OutHandler': '    return nullptr;',
+    'std::vector<std::string>': '    return {};',
+    'std::vector<int64_t>': '    return {};',
+    'std::map': '    return {};',
+    'uint32_t': '    return 0;',
+    'int64_t': '    return 0;',
+    'uint64_t': '    return 0;',
+    'size_t': '    return 0;',
+    'float': '    return 0.0f;',
+    'bool': '    return false;',
+}
+
+"""
+    max code len per line in hua_wei software programming specifications
+"""
+max_code_len_per_line = 100
+
+"""
+    white_list_for_debug, include_dir_key_words is to
+    determines which header files to generate cc files from
+    when DEBUG on
+"""
+white_list_for_debug = ["operator.h", "tensor.h",
+                        "graph.h", "operator_factory.h",
+                        "ge_ir_build.h"]
+include_dir_key_words = ["ge", "graph"]
+DEBUG = True
+
+
+def need_generate_func(func_line):
+    """
+    :param func_line:
+    :return:
+    """
+    if func_line.strip().endswith("default") or func_line.strip().endswith("delete") \
+            or func_line.strip().startswith("typedef") or func_line.strip().startswith("using"):
+        return False
+    return True
+
+
+def file_endswith_white_list_suffix(file):
+    """
+    :param file:
+    :return:
+    """
+    if DEBUG:
+        for suffix in white_list_for_debug:
+            if file.endswith(suffix):
+                return True
+        return False
+    else:
+        return True
+
+
+"""
+    belows are patterns used for analyse .h file
+"""
+# pattern function
+pattern_func = re.compile(r"""(^[\s]*)          #leading with space,we will find and delete after
+([a-zA-Z~_]            # void int likely
+.*
+[)]                     #we find )
+(?!.*{)                 # we do not want the case int abc() const { return 1;}
+.*)
+(;.*)                   #we want to find ; and after for we will replace these later
+\n$
+""", re.VERBOSE | re.MULTILINE | re.DOTALL)
+
+# pattern comment
+pattern_comment = re.compile(r'^\s*//')
+pattern_comment_2_start = re.compile(r'^\s*/[*]')
+pattern_comment_2_end = re.compile(r'[*]/\s*$')
+# pattern define
+pattern_define = re.compile(r'^\s*#define')
+pattern_define_return = re.compile(r'\\\s*$')
+# blank line
+pattern_blank_line = re.compile(r'^\s*$')
+# virtual,explicit,friend,static
+pattern_keyword = re.compile(r'(virtual\s+|explicit\s+|friend\s+|static\s+)')
+# lead space
+pattern_leading_space = re.compile(r'(^[\s]*)[a-zA-Z~_]')
+# functions will have patterns such as func ( or func(
+# but operator is an exception; the class name is preceded by an operator, and the above mode does not exist
+# format like :"operator = ()"
+pattern_func_name = re.compile(r'([a-zA-Z0-9~_\-]+\s*|operator?.*)[(]')
+# template
+pattern_template = re.compile(r'^\s*template')
+pattern_template_end = re.compile(r'>\s*$')
+# namespace
+pattern_namespace = re.compile(r'namespace.*{')
+# class : which can handle classA a and {not on the same line, but if found ';' after class,then don't deal with
+pattern_class = re.compile(r'^[\s]*(class|struct)\s+(%s\s+)?([a-zA-Z0-9_\-]+<?)(?!.*;)' % GE_ATTR)
+# {}
+pattern_start = re.compile('{')
+pattern_end = re.compile('}')
+
+line_index = 0
+
+
+class H2CC(object):
+    def __init__(self, input_file, output_file, shared_includes_content):
+        """
+        :param input_file:
+        :param output_file:
+        :param shared_includes_content:
+        """
+        self.input_file = input_file
+        self.output_file = output_file
+        self.shared_includes_content = shared_includes_content
+        self.line_index = 0
+        self.input_fd = open(self.input_file, 'r')
+        self.input_content = self.input_fd.readlines()
+        self.output_fd = open(self.output_file, 'w')
+
+        # The state may be normal_now(in the middle of {}),class_now,namespace_now
+        self.stack = []
+        self.stack_class = []
+        self.stack_template = []
+        # record funcs generated by h2cc func
+        self.func_list_exist = []
+
+    def __del__(self):
+        self.input_fd.close()
+        self.output_fd.close()
+        del self.stack
+        del self.stack_class
+        del self.stack_template
+        del self.func_list_exist
+
+    def just_skip(self):
+        # skip blank line or comment
+        if pattern_blank_line.search(self.input_content[self.line_index]) or pattern_comment.search(
+                self.input_content[self.line_index]):  # /n or comment using //
+            self.line_index += 1
+        if pattern_comment_2_start.search(self.input_content[self.line_index]):  # comment using /*
+            while not pattern_comment_2_end.search(self.input_content[self.line_index]):  # */
+                self.line_index += 1
+            self.line_index += 1
+        # skip define
+        if pattern_define.search(self.input_content[self.line_index]):
+            while pattern_blank_line.search(self.input_content[self.line_index]) or pattern_define_return.search(
+                    self.input_content[self.line_index]):
+                self.line_index += 1
+            self.line_index += 1
+
+    def write_inc_content(self):
+        for shared_include_content in self.shared_includes_content:
+            self.output_fd.write(shared_include_content)
+
+    def h2cc(self):
+        """
+        :return:
+        """
+        logging.info("start generate cc_file[%s] from h_file[%s]", self.output_file, self.input_file)
+        global pattern_comment
+        global pattern_comment_2_start
+        global pattern_comment_2_end
+        global pattern_blank_line
+        global pattern_func
+        global pattern_keyword
+        global pattern_leading_space
+        global pattern_func_name
+        global pattern_template
+        global pattern_template_end
+        global pattern_namespace
+        global pattern_class
+        global pattern_start
+        global pattern_end
+        global line_index
+        # write inc content
+        self.write_inc_content()
+        # core processing cycle, process the input .h file by line
+        while self.line_index < len(self.input_content):
+            # handle comment and blank line
+            self.just_skip()
+
+            # match namespace
+            self.handle_namespace()
+
+            # match template
+            template_string = self.handle_template()
+            # match class
+            line = self.input_content[self.line_index]
+            match_class = pattern_class.search(line)
+            match_start = pattern_start.search(line)
+            handle_class_result = self.handle_class(template_string, line, match_start, match_class)
+            if handle_class_result == "continue":
+                continue
+
+            # match "}"
+            handle_stack_result = self.handle_stack(match_start)
+            if handle_stack_result == "continue":
+                continue
+            # handle func
+            handle_func1_result, line, start_i = self.handle_func1(line)
+            if handle_func1_result == "continue":
+                continue
+
+            # here means func is found
+            # delete key word
+            line = pattern_keyword.sub('', line)
+            logging.info("line[%s]", line)
+
+            # Class member function
+            # if friend we will not add class name
+            friend_match = re.search('friend ', line)
+            if len(self.stack_class) > 0 and not friend_match:
+                line, func_name = self.handle_class_member_func(line, template_string)
+            # Normal functions
+            else:
+                line, func_name = self.handle_normal_func(line, template_string)
+
+            need_generate = need_generate_func(line)
+            # func body
+            line += self.implement_function(line)
+            # comment
+            line = self.gen_comment(start_i) + line
+            # write to out file
+            self.write_func_content(line, func_name, need_generate)
+            # next loop
+            self.line_index += 1
+
+        logging.info('Added %s functions', len(self.func_list_exist))
+        logging.info('Successfully converted,please see ' + self.output_file)
+
+    def handle_func1(self, line):
+        """
+        :param line:
+        :return:
+        """
+        find1 = re.search('[(]', line)
+        if not find1:
+            self.line_index += 1
+            return "continue", line, None
+        find2 = re.search('[)]', line)
+        start_i = self.line_index
+        space_match = pattern_leading_space.search(line)
+        # deal with
+        # int abc(int a,
+        #        int b)
+        if find1 and (not find2):
+            self.line_index += 1
+            line2 = self.input_content[self.line_index]
+            if space_match:
+                line2 = re.sub('^' + space_match.group(1), '', line2)
+            line += line2
+            while self.line_index < len(self.input_content) and (not re.search('[)]', line2)):
+                self.line_index += 1
+                line2 = self.input_content[self.line_index]
+                line2 = re.sub('^' + space_match.group(1), '', line2)
+                line += line2
+
+        match_start = pattern_start.search(self.input_content[self.line_index])
+        match_end = pattern_end.search(self.input_content[self.line_index])
+        if match_start:  # like  ) {  or ) {}    int the last line
+            if not match_end:
+                self.stack.append('normal_now')
+            ii = start_i
+            while ii <= self.line_index:
+                ii += 1
+            self.line_index += 1
+            return "continue", line, start_i
+        logging.info("line[%s]", line)
+        # '  int abc();'->'int abc()'
+        (line, match) = pattern_func.subn(r'\2\n', line)
+        logging.info("line[%s]", line)
+        # deal with case:
+        # 'int \n abc(int a, int b)'
+        if re.search(r'^\s*(inline)?\s*[a-zA-Z0-9_]+\s*$', self.input_content[start_i - 1]):
+            line = self.input_content[start_i - 1] + line
+        line = line.lstrip()
+        if not match:
+            self.line_index += 1
+            return "continue", line, start_i
+        return "pass", line, start_i
+
+    def handle_stack(self, match_start):
+        """
+        :param match_start:
+        :return:
+        """
+        line = self.input_content[self.line_index]
+        match_end = pattern_end.search(line)
+        if match_start:
+            self.stack.append('normal_now')
+        if match_end:
+            top_status = self.stack.pop()
+            if top_status == 'namespace_now':
+                self.output_fd.write(line + '\n')
+            elif top_status == 'class_now':
+                self.stack_class.pop()
+                self.stack_template.pop()
+        if match_start or match_end:
+            self.line_index += 1
+            return "continue"
+
+        if len(self.stack) > 0 and self.stack[-1] == 'normal_now':
+            self.line_index += 1
+            return "continue"
+        return "pass"
+
+    def handle_class(self, template_string, line, match_start, match_class):
+        """
+        :param template_string:
+        :param line:
+        :param match_start:
+        :param match_class:
+        :return:
+        """
+        if match_class:  # we face a class
+            self.stack_template.append(template_string)
+            self.stack.append('class_now')
+            class_name = match_class.group(3)
+
+            # class template specializations: class A<u,Node<u> >
+            if '<' in class_name:
+                k = line.index('<')
+                fit = 1
+                for ii in range(k + 1, len(line)):
+                    if line[ii] == '<':
+                        fit += 1
+                    if line[ii] == '>':
+                        fit -= 1
+                    if fit == 0:
+                        break
+                class_name += line[k + 1:ii + 1]
+            logging.info('class_name[%s]', class_name)
+            self.stack_class.append(class_name)
+            while not match_start:
+                self.line_index += 1
+                line = self.input_content[self.line_index]
+                match_start = pattern_start.search(line)
+            self.line_index += 1
+            return "continue"
+        return "pass"
+
+    def handle_template(self):
+        line = self.input_content[self.line_index]
+        match_template = pattern_template.search(line)
+        template_string = ''
+        if match_template:
+            match_template_end = pattern_template_end.search(line)
+            template_string = line
+            while not match_template_end:
+                self.line_index += 1
+                line = self.input_content[self.line_index]
+                template_string += line
+                match_template_end = pattern_template_end.search(line)
+            self.line_index += 1
+        return template_string
+
+    def handle_namespace(self):
+        line = self.input_content[self.line_index]
+        match_namespace = pattern_namespace.search(line)
+        if match_namespace:  # we face namespace
+            self.output_fd.write(line + '\n')
+            self.stack.append('namespace_now')
+            self.line_index += 1
+
+    def handle_normal_func(self, line, template_string):
+        template_line = ''
+        self.stack_template.append(template_string)
+        if self.stack_template[-1] != '':
+            template_line = re.sub(r'\s*template', 'template', self.stack_template[-1])
+            # change '< class T = a, class U = A(3)>' to '<class T, class U>'
+            template_line = re.sub(r'\s*=.*>(\s*)$', r'>\1', template_line)
+            template_line = re.sub(r'\s*=.*,', ',', template_line)
+            template_line = re.sub(r'\s*=.*', '', template_line)
+        line = re.sub(r'\s*=.*,', ',', line)
+        line = re.sub(r'\s*=.*\)', ')', line)
+        line = template_line + line
+        self.stack_template.pop()
+        func_name = re.search(r'^.*\)', line, re.MULTILINE | re.DOTALL).group()
+        logging.info("line[%s]", line)
+        logging.info("func_name[%s]", func_name)
+        return line, func_name
+
+    def handle_class_member_func(self, line, template_string):
+        template_line = ''
+        x = ''
+        if template_string != '':
+            template_string = re.sub(r'\s*template', 'template', template_string)
+            template_string = re.sub(r'\s*=.*>(\s*)$', r'>\1', template_string)
+            template_string = re.sub(r'\s*=.*,', ',', template_string)
+            template_string = re.sub(r'\s*=.*', '', template_string)
+        if self.stack_template[-1] != '':
+            if not (re.search(r'<\s*>', stack_template[-1])):
+                template_line = re.sub(r'^\s*template', 'template', stack_template[-1])
+                if not (re.search(r'<.*>', self.stack_class[-1])):
+                    # for x we get like template<class T, typename U> -> <T,U>
+                    x = re.sub(r'template\s*<', '<', template_line)  # remove template -> <class T, typename U>
+                    x = re.sub(r'\n', '', x)
+                    x = re.sub(r'\s*=.*,', ',', x)
+                    x = re.sub(r'\s*=.*\>', '>', x)
+                    x = x.rstrip()  # remove \n
+                    x = re.sub(r'(class|typename)\s+|(<class>|<typename>\s*class)', '',
+                               x)  # remove class,typename ->  <T, U>
+                    x = re.sub(r'<\s+', '<', x)
+                    x = re.sub(r'\s+>', '>', x)
+                    x = re.sub(r'\s+,', ',', x)
+                    x = re.sub(r',\s+', ', ', x)
+        line = re.sub(r'\s*=\s+0', '', line)
+        line = re.sub(r'\s*=\s+.*,', ',', line)
+        line = re.sub(r'\s*=\s+.*\)', ')', line)
+        logging.info("x[%s]\nline[%s]", x, line)
+        # if the function is long, void ABC::foo()
+        # breaks into two lines void ABC::\n foo()
+        temp_line = pattern_func_name.sub(self.stack_class[-1] + x + '::' + r'\1(', line, count=1)
+        if len(temp_line) > max_code_len_per_line:
+            line = pattern_func_name.sub(self.stack_class[-1] + x + '::\n' + r'\1(', line, count=1)
+        else:
+            line = temp_line
+        logging.info("line[%s]", line)
+        # add template as the above if there is one
+        template_line = re.sub(r'\s*=.*>(\s*)$', r'>\1', template_line)
+        template_line = re.sub(r'\s*=.*,', ',', template_line)
+        template_line = re.sub(r'\s*=.*', '', template_line)
+        line = template_line + template_string + line
+        func_name = re.search(r'^.*\)', line, re.MULTILINE | re.DOTALL).group()
+        logging.info("line[%s]", line)
+        logging.info("func_name[%s]", func_name)
+        return line, func_name
+
+    def write_func_content(self, content, func_name, need_generate):
+        if not (func_name in self.func_list_exist) and need_generate:
+            self.output_fd.write(content)
+            self.func_list_exist.append(func_name)
+            logging.info('add func:[%s]', func_name)
+
+    def gen_comment(self, start_i):
+        comment_line = ''
+        # Function comments are on top of function declarations, copy them over
+        k = start_i - 1  # one line before this func start
+        if pattern_template.search(self.input_content[k]):
+            k -= 1
+        if pattern_comment_2_end.search(self.input_content[k]):
+            comment_line = self.input_content[k].lstrip()
+            while not pattern_comment_2_start.search(self.input_content[k]):
+                k -= 1
+                comment_line = self.input_content[k].lstrip() + comment_line
+        else:
+            for j in range(k, 0, -1):
+                c_line = self.input_content[j]
+                if pattern_comment.search(c_line):
+                    c_line = re.sub(r'\s*//', '//', c_line)
+                    comment_line = c_line + comment_line
+                else:
+                    break
+        return comment_line
+
+    @staticmethod
+    def implement_function(func):
+        function_def = ''
+        function_def += '{\n'
+
+        all_items = func.split()
+        start = 0
+        return_type = all_items[start]
+        if return_type == "const":
+            start += 1
+            return_type = all_items[start]
+        if return_type.startswith(('std::map', 'std::set', 'std::vector')):
+            return_type = "std::map"
+        if return_type.endswith('*') or (len(all_items) > start + 1 and all_items[start + 1].startswith('*')):
+            return_type = "Ptr"
+        if len(all_items) > start + 1 and all_items[start + 1].startswith('&'):
+            return_type += "&"
+        if RETURN_STATEMENTS.__contains__(return_type):
+            function_def += RETURN_STATEMENTS[return_type]
+        else:
+            logging.warning("Unhandled return type[%s]", return_type)
+
+        function_def += '\n'
+        function_def += '}\n'
+        function_def += '\n'
+        return function_def
+
+
+def collect_header_files(path):
+    """
+    :param path:
+    :return:
+    """
+    header_files = []
+    shared_includes_content = []
+    for root, dirs, files in os.walk(path):
+        files.sort()
+        for file in files:
+            if file.find("git") >= 0:
+                continue
+            if not file.endswith('.h'):
+                continue
+            file_path = os.path.join(root, file)
+            file_path = file_path.replace('\\', '/')
+            header_files.append(file_path)
+            include_str = '#include "{}"\n'.format(file_path[path.rindex('/') + 1:])
+            shared_includes_content.append(include_str)
+    return header_files, shared_includes_content
+
+
+def generate_stub_file(inc_dir, out_cc_dir):
+    """
+    :param inc_dir:
+    :param out_cc_dir:
+    :return:
+    """
+    target_header_files, shared_includes_content = collect_header_files(inc_dir)
+    for header_file in target_header_files:
+        if not file_endswith_white_list_suffix(header_file):
+            continue
+        cc_file = re.sub('.h*$', '.cc', header_file)
+        h_2_cc = H2CC(header_file, out_cc_dir + cc_file[cc_file.rindex('/') + 1:], shared_includes_content)
+        h_2_cc.h2cc()
+
+
+def gen_code(inc_dir, out_cc_dir):
+    """
+    :param inc_dir:
+    :param out_cc_dir:
+    :return:
+    """
+    if not inc_dir.endswith('/'):
+        inc_dir += '/'
+    if not out_cc_dir.endswith('/'):
+        out_cc_dir += '/'
+    for include_dir_key_word in include_dir_key_words:
+        generate_stub_file(inc_dir + include_dir_key_word, out_cc_dir)
+
+
+if __name__ == '__main__':
+    inc_dir = sys.argv[1]
+    out_cc_dir = sys.argv[2]
+    gen_code(inc_dir, out_cc_dir)