#!/usr/bin/env python from __future__ import print_function import os, sys, re, string, io # the list only for debugging. The real list, used in the real OpenCV build, is specified in CMakeLists.txt opencv_hdr_list = [ "../../core/include/opencv2/core.hpp", "../../core/include/opencv2/core/mat.hpp", "../../core/include/opencv2/core/ocl.hpp", "../../flann/include/opencv2/flann/miniflann.hpp", "../../ml/include/opencv2/ml.hpp", "../../imgproc/include/opencv2/imgproc.hpp", "../../calib3d/include/opencv2/calib3d.hpp", "../../features2d/include/opencv2/features2d.hpp", "../../video/include/opencv2/video/tracking.hpp", "../../video/include/opencv2/video/background_segm.hpp", "../../objdetect/include/opencv2/objdetect.hpp", "../../imgcodecs/include/opencv2/imgcodecs.hpp", "../../videoio/include/opencv2/videoio.hpp", "../../highgui/include/opencv2/highgui.hpp", ] """ Each declaration is [funcname, return_value_type /* in C, not in Python */, , , original_return_type, docstring], where each element of is 4-element list itself: [argtype, argname, default_value /* or "" if none */, ] where the list of modifiers is yet another nested list of strings (currently recognized are "/O" for output argument, "/S" for static (i.e. class) methods and "/A value" for the plain C arrays with counters) original_return_type is None if the original_return_type is the same as return_value_type """ class CppHeaderParser(object): def __init__(self, generate_umat_decls=False, generate_gpumat_decls=False): self._generate_umat_decls = generate_umat_decls self._generate_gpumat_decls = generate_gpumat_decls self.BLOCK_TYPE = 0 self.BLOCK_NAME = 1 self.PROCESS_FLAG = 2 self.PUBLIC_SECTION = 3 self.CLASS_DECL = 4 self.namespaces = set() def batch_replace(self, s, pairs): for before, after in pairs: s = s.replace(before, after) return s def get_macro_arg(self, arg_str, npos): npos2 = npos3 = arg_str.find("(", npos) if npos2 < 0: print("Error: no arguments for the macro at %s:%d" % (self.hname, self.lineno)) sys.exit(-1) balance = 1 while 1: t, npos3 = self.find_next_token(arg_str, ['(', ')'], npos3+1) if npos3 < 0: print("Error: no matching ')' in the macro call at %s:%d" % (self.hname, self.lineno)) sys.exit(-1) if t == '(': balance += 1 if t == ')': balance -= 1 if balance == 0: break return arg_str[npos2+1:npos3].strip(), npos3 def parse_arg(self, arg_str, argno): """ Parses [arg_name] Returns arg_type, arg_name, modlist, argno, where modlist is the list of wrapper-related modifiers (such as "output argument", "has counter", ...) and argno is the new index of an anonymous argument. That is, if no arg_str is just an argument type without argument name, the argument name is set to "arg" + str(argno), and then argno is incremented. """ modlist = [] # pass 0: extracts the modifiers if "CV_OUT" in arg_str: modlist.append("/O") arg_str = arg_str.replace("CV_OUT", "") if "CV_IN_OUT" in arg_str: modlist.append("/IO") arg_str = arg_str.replace("CV_IN_OUT", "") isarray = False npos = arg_str.find("CV_CARRAY") if npos >= 0: isarray = True macro_arg, npos3 = self.get_macro_arg(arg_str, npos) modlist.append("/A " + macro_arg) arg_str = arg_str[:npos] + arg_str[npos3+1:] npos = arg_str.find("CV_CUSTOM_CARRAY") if npos >= 0: isarray = True macro_arg, npos3 = self.get_macro_arg(arg_str, npos) modlist.append("/CA " + macro_arg) arg_str = arg_str[:npos] + arg_str[npos3+1:] npos = arg_str.find("const") if npos >= 0: modlist.append("/C") npos = arg_str.find("&&") if npos >= 0: arg_str = arg_str.replace("&&", '') modlist.append("/RRef") npos = arg_str.find("&") if npos >= 0: modlist.append("/Ref") arg_str = arg_str.strip() word_start = 0 word_list = [] npos = -1 #print self.lineno, ":\t", arg_str # pass 1: split argument type into tokens while 1: npos += 1 t, npos = self.find_next_token(arg_str, [" ", "&", "*", "<", ">", ","], npos) w = arg_str[word_start:npos].strip() if w == "operator": word_list.append("operator " + arg_str[npos:].strip()) break if w not in ["", "const"]: word_list.append(w) if t not in ["", " ", "&"]: word_list.append(t) if not t: break word_start = npos+1 npos = word_start - 1 arg_type = "" arg_name = "" angle_stack = [] #print self.lineno, ":\t", word_list # pass 2: decrypt the list wi = -1 prev_w = "" for w in word_list: wi += 1 if w == "*": if prev_w == "char" and not isarray: arg_type = arg_type[:-len("char")] + "c_string" else: arg_type += w continue elif w == "<": arg_type += "_" angle_stack.append(0) elif w == "," or w == '>': if not angle_stack: print("Error at %s:%d: argument contains ',' or '>' not within template arguments" % (self.hname, self.lineno)) sys.exit(-1) if w == ",": arg_type += "_and_" elif w == ">": if angle_stack[0] == 0: print("Error at %s:%d: template has no arguments" % (self.hname, self.lineno)) sys.exit(-1) if angle_stack[0] > 1: arg_type += "_end_" angle_stack[-1:] = [] elif angle_stack: arg_type += w angle_stack[-1] += 1 elif arg_type == "struct": arg_type += " " + w elif arg_type and arg_type != "~": arg_name = " ".join(word_list[wi:]) break else: arg_type += w prev_w = w counter_str = "" add_star = False if ("[" in arg_name) and not ("operator" in arg_str): #print arg_str p1 = arg_name.find("[") p2 = arg_name.find("]",p1+1) if p2 < 0: print("Error at %s:%d: no closing ]" % (self.hname, self.lineno)) sys.exit(-1) counter_str = arg_name[p1+1:p2].strip() if counter_str == "": counter_str = "?" if not isarray: modlist.append("/A " + counter_str.strip()) arg_name = arg_name[:p1] add_star = True if not arg_name: if arg_type.startswith("operator"): arg_type, arg_name = "", arg_type else: arg_name = "arg" + str(argno) argno += 1 while arg_type.endswith("_end_"): arg_type = arg_type[:-len("_end_")] if add_star: arg_type += "*" arg_type = self.batch_replace(arg_type, [("std::", ""), ("cv::", ""), ("::", "_")]) return arg_type, arg_name, modlist, argno def parse_enum(self, decl_str): l = decl_str ll = l.split(",") if ll[-1].strip() == "": ll = ll[:-1] prev_val = "" prev_val_delta = -1 decl = [] for pair in ll: pv = pair.split("=") if len(pv) == 1: prev_val_delta += 1 val = "" if prev_val: val = prev_val + "+" val += str(prev_val_delta) else: prev_val_delta = 0 prev_val = val = pv[1].strip() decl.append(["const " + self.get_dotted_name(pv[0].strip()), val, [], [], None, ""]) return decl def parse_class_decl(self, decl_str): """ Parses class/struct declaration start in the form: {class|struct} [CV_EXPORTS] [: public [, ...]] Returns class_name1, """ l = decl_str modlist = [] if "CV_EXPORTS_W_MAP" in l: l = l.replace("CV_EXPORTS_W_MAP", "") modlist.append("/Map") if "CV_EXPORTS_W_SIMPLE" in l: l = l.replace("CV_EXPORTS_W_SIMPLE", "") modlist.append("/Simple") npos = l.find("CV_EXPORTS_AS") if npos < 0: npos = l.find('CV_WRAP_AS') if npos >= 0: macro_arg, npos3 = self.get_macro_arg(l, npos) modlist.append("=" + macro_arg) l = l[:npos] + l[npos3+1:] l = self.batch_replace(l, [("CV_EXPORTS_W", ""), ("CV_EXPORTS", ""), ("public virtual ", " "), ("public ", " "), ("::", ".")]).strip() ll = re.split(r'\s+|\s*[,:]\s*', l) ll = [le for le in ll if le] classname = ll[1] bases = ll[2:] return classname, bases, modlist def parse_func_decl_no_wrap(self, decl_str, static_method=False, docstring=""): decl_str = (decl_str or "").strip() virtual_method = False explicit_method = False if decl_str.startswith("explicit"): decl_str = decl_str[len("explicit"):].lstrip() explicit_method = True if decl_str.startswith("virtual"): decl_str = decl_str[len("virtual"):].lstrip() virtual_method = True if decl_str.startswith("static"): decl_str = decl_str[len("static"):].lstrip() static_method = True fdecl = decl_str.replace("CV_OUT", "").replace("CV_IN_OUT", "") fdecl = fdecl.strip().replace("\t", " ") while " " in fdecl: fdecl = fdecl.replace(" ", " ") fname = fdecl[:fdecl.find("(")].strip() fnpos = fname.rfind(" ") if fnpos < 0: fnpos = 0 fname = fname[fnpos:].strip() rettype = fdecl[:fnpos].strip() if rettype.endswith("operator"): fname = ("operator " + fname).strip() rettype = rettype[:rettype.rfind("operator")].strip() if rettype.endswith("::"): rpos = rettype.rfind(" ") if rpos >= 0: fname = rettype[rpos+1:].strip() + fname rettype = rettype[:rpos].strip() else: fname = rettype + fname rettype = "" apos = fdecl.find("(") if fname.endswith("operator"): fname += " ()" apos = fdecl.find("(", apos+1) fname = "cv." + fname.replace("::", ".") decl = [fname, rettype, [], [], None, docstring] # inline constructor implementation implmatch = re.match(r"(\(.*?\))\s*:\s*(\w+\(.*?\),?\s*)+", fdecl[apos:]) if bool(implmatch): fdecl = fdecl[:apos] + implmatch.group(1) args0str = fdecl[apos+1:fdecl.rfind(")")].strip() if args0str != "" and args0str != "void": args0str = re.sub(r"\([^)]*\)", lambda m: m.group(0).replace(',', "@comma@"), args0str) args0 = args0str.split(",") args = [] narg = "" for arg in args0: narg += arg.strip() balance_paren = narg.count("(") - narg.count(")") balance_angle = narg.count("<") - narg.count(">") if balance_paren == 0 and balance_angle == 0: args.append(narg.strip()) narg = "" for arg in args: dfpos = arg.find("=") defval = "" if dfpos >= 0: defval = arg[dfpos+1:].strip() else: dfpos = arg.find("CV_DEFAULT") if dfpos >= 0: defval, pos3 = self.get_macro_arg(arg, dfpos) else: dfpos = arg.find("CV_WRAP_DEFAULT") if dfpos >= 0: defval, pos3 = self.get_macro_arg(arg, dfpos) if dfpos >= 0: defval = defval.replace("@comma@", ",") arg = arg[:dfpos].strip() pos = len(arg)-1 while pos >= 0 and (arg[pos] in "_[]" or arg[pos].isalpha() or arg[pos].isdigit()): pos -= 1 if pos >= 0: aname = arg[pos+1:].strip() atype = arg[:pos+1].strip() if aname.endswith("&") or aname.endswith("*") or (aname in ["int", "String", "Mat"]): atype = (atype + " " + aname).strip() aname = "" else: atype = arg aname = "" if aname.endswith("]"): bidx = aname.find('[') atype += aname[bidx:] aname = aname[:bidx] decl[3].append([atype, aname, defval, []]) if static_method: decl[2].append("/S") if virtual_method: decl[2].append("/V") if explicit_method: decl[2].append("/E") if bool(re.match(r".*\)\s*(const)?\s*=\s*0", decl_str)): decl[2].append("/A") if bool(re.match(r".*\)\s*const(\s*=\s*0)?", decl_str)): decl[2].append("/C") return decl def parse_func_decl(self, decl_str, mat="Mat", docstring=""): """ Parses the function or method declaration in the form: [([CV_EXPORTS] ) | CVAPI(rettype)] [~] ( [=] [, [=] ...]) [const] {; | } Returns the function declaration entry: [, , , , , ] (see above) """ if self.wrap_mode: if not (("CV_EXPORTS_AS" in decl_str) or ("CV_EXPORTS_W" in decl_str) or ("CV_WRAP" in decl_str)): return [] # ignore old API in the documentation check (for now) if "CVAPI(" in decl_str and self.wrap_mode: return [] top = self.block_stack[-1] func_modlist = [] npos = decl_str.find("CV_EXPORTS_AS") if npos >= 0: arg, npos3 = self.get_macro_arg(decl_str, npos) func_modlist.append("="+arg) decl_str = decl_str[:npos] + decl_str[npos3+1:] npos = decl_str.find("CV_WRAP_AS") if npos >= 0: arg, npos3 = self.get_macro_arg(decl_str, npos) func_modlist.append("="+arg) decl_str = decl_str[:npos] + decl_str[npos3+1:] npos = decl_str.find("CV_WRAP_PHANTOM") if npos >= 0: decl_str, _ = self.get_macro_arg(decl_str, npos) func_modlist.append("/phantom") npos = decl_str.find("CV_WRAP_MAPPABLE") if npos >= 0: mappable, npos3 = self.get_macro_arg(decl_str, npos) func_modlist.append("/mappable="+mappable) classname = top[1] return ['.'.join([classname, classname]), None, func_modlist, [], None, None] virtual_method = False pure_virtual_method = False const_method = False # filter off some common prefixes, which are meaningless for Python wrappers. # note that we do not strip "static" prefix, which does matter; # it means class methods, not instance methods decl_str = self.batch_replace(decl_str, [("static inline", ""), ("inline", ""), ("explicit ", ""), ("CV_EXPORTS_W", ""), ("CV_EXPORTS", ""), ("CV_CDECL", ""), ("CV_WRAP ", " "), ("CV_INLINE", ""), ("CV_DEPRECATED", ""), ("CV_DEPRECATED_EXTERNAL", ""), ("CV_NODISCARD_STD", ""), ("CV_NODISCARD", "")]).strip() if decl_str.strip().startswith('virtual'): virtual_method = True decl_str = decl_str.replace('virtual' , '') end_tokens = decl_str[decl_str.rfind(')'):].split() const_method = 'const' in end_tokens pure_virtual_method = '=' in end_tokens and '0' in end_tokens static_method = False context = top[0] if decl_str.startswith("static") and (context == "class" or context == "struct"): decl_str = decl_str[len("static"):].lstrip() static_method = True args_begin = decl_str.find("(") if decl_str.startswith("CVAPI"): rtype_end = decl_str.find(")", args_begin+1) if rtype_end < 0: print("Error at %d. no terminating ) in CVAPI() macro: %s" % (self.lineno, decl_str)) sys.exit(-1) decl_str = decl_str[args_begin+1:rtype_end] + " " + decl_str[rtype_end+1:] args_begin = decl_str.find("(") if args_begin < 0: print("Error at %d: no args in '%s'" % (self.lineno, decl_str)) sys.exit(-1) decl_start = decl_str[:args_begin].strip() # handle operator () case if decl_start.endswith("operator"): args_begin = decl_str.find("(", args_begin+1) if args_begin < 0: print("Error at %d: no args in '%s'" % (self.lineno, decl_str)) sys.exit(-1) decl_start = decl_str[:args_begin].strip() # TODO: normalize all type of operators if decl_start.endswith("()"): decl_start = decl_start[0:-2].rstrip() + " ()" # constructor/destructor case if bool(re.match(r'^(\w+::)*(?P\w+)::~?(?P=x)$', decl_start)): decl_start = "void " + decl_start rettype, funcname, modlist, argno = self.parse_arg(decl_start, -1) # determine original return type, hack for return types with underscore original_type = None i = decl_start.rfind(funcname) if i > 0: original_type = decl_start[:i].replace("&", "").replace("const", "").strip() if argno >= 0: classname = top[1] if rettype == classname or rettype == "~" + classname: rettype, funcname = "", rettype else: if bool(re.match('\w+\s+\(\*\w+\)\s*\(.*\)', decl_str)): return [] # function typedef elif bool(re.match('\w+\s+\(\w+::\*\w+\)\s*\(.*\)', decl_str)): return [] # class method typedef elif bool(re.match('[A-Z_]+', decl_start)): return [] # it seems to be a macro instantiation elif "__declspec" == decl_start: return [] elif bool(re.match(r'\w+\s+\(\*\w+\)\[\d+\]', decl_str)): return [] # exotic - dynamic 2d array else: #print rettype, funcname, modlist, argno print("Error at %s:%d the function/method name is missing: '%s'" % (self.hname, self.lineno, decl_start)) sys.exit(-1) if self.wrap_mode and (("::" in funcname) or funcname.startswith("~")): # if there is :: in function name (and this is in the header file), # it means, this is inline implementation of a class method. # Thus the function has been already declared within the class and we skip this repeated # declaration. # Also, skip the destructors, as they are always wrapped return [] funcname = self.get_dotted_name(funcname) if not self.wrap_mode: decl = self.parse_func_decl_no_wrap(decl_str, static_method, docstring) decl[0] = funcname return decl arg_start = args_begin+1 npos = arg_start-1 balance = 1 angle_balance = 0 # scan the argument list; handle nested parentheses args_decls = [] args = [] argno = 1 while balance > 0: npos += 1 t, npos = self.find_next_token(decl_str, ["(", ")", ",", "<", ">"], npos) if not t: print("Error: no closing ')' at %d" % (self.lineno,)) sys.exit(-1) if t == "<": angle_balance += 1 if t == ">": angle_balance -= 1 if t == "(": balance += 1 if t == ")": balance -= 1 if (t == "," and balance == 1 and angle_balance == 0) or balance == 0: # process next function argument a = decl_str[arg_start:npos].strip() #print "arg = ", a arg_start = npos+1 if a: eqpos = a.find("=") defval = "" modlist = [] if eqpos >= 0: defval = a[eqpos+1:].strip() else: eqpos = a.find("CV_DEFAULT") if eqpos >= 0: defval, pos3 = self.get_macro_arg(a, eqpos) else: eqpos = a.find("CV_WRAP_DEFAULT") if eqpos >= 0: defval, pos3 = self.get_macro_arg(a, eqpos) if defval == "NULL": defval = "0" if eqpos >= 0: a = a[:eqpos].strip() arg_type, arg_name, modlist, argno = self.parse_arg(a, argno) if self.wrap_mode: # TODO: Vectors should contain UMat, but this is not very easy to support and not very needed vector_mat = "vector_{}".format(mat) vector_mat_template = "vector<{}>".format(mat) if arg_type == "InputArray": arg_type = mat elif arg_type == "InputOutputArray": arg_type = mat modlist.append("/IO") elif arg_type == "OutputArray": arg_type = mat modlist.append("/O") elif arg_type == "InputArrayOfArrays": arg_type = vector_mat elif arg_type == "InputOutputArrayOfArrays": arg_type = vector_mat modlist.append("/IO") elif arg_type == "OutputArrayOfArrays": arg_type = vector_mat modlist.append("/O") defval = self.batch_replace(defval, [("InputArrayOfArrays", vector_mat_template), ("InputOutputArrayOfArrays", vector_mat_template), ("OutputArrayOfArrays", vector_mat_template), ("InputArray", mat), ("InputOutputArray", mat), ("OutputArray", mat), ("noArray", arg_type)]).strip() args.append([arg_type, arg_name, defval, modlist]) npos = arg_start-1 if static_method: func_modlist.append("/S") if const_method: func_modlist.append("/C") if virtual_method: func_modlist.append("/V") if pure_virtual_method: func_modlist.append("/PV") return [funcname, rettype, func_modlist, args, original_type, docstring] def get_dotted_name(self, name): """ adds the dot-separated container class/namespace names to the bare function/class name, e.g. when we have namespace cv { class A { public: f(int); }; } the function will convert "A" to "cv.A" and "f" to "cv.A.f". """ if not self.block_stack: return name if name.startswith("cv."): return name qualified_name = (("." in name) or ("::" in name)) n = "" for b in self.block_stack: block_type, block_name = b[self.BLOCK_TYPE], b[self.BLOCK_NAME] if block_type in ["file", "enum"]: continue if block_type in ["enum struct", "enum class"] and block_name == name: continue if block_type not in ["struct", "class", "namespace", "enum struct", "enum class"]: print("Error at %d: there are non-valid entries in the current block stack %s" % (self.lineno, self.block_stack)) sys.exit(-1) if block_name and (block_type == "namespace" or not qualified_name): n += block_name + "." n += name.replace("::", ".") if n.endswith(".Algorithm"): n = "cv.Algorithm" return n def parse_stmt(self, stmt, end_token, mat="Mat", docstring=""): """ parses the statement (ending with ';' or '}') or a block head (ending with '{') The function calls parse_class_decl or parse_func_decl when necessary. It returns , , , where the first 3 values only make sense for blocks (i.e. code blocks, namespaces, classes, enums and such) """ stack_top = self.block_stack[-1] context = stack_top[self.BLOCK_TYPE] if stmt.startswith('inline namespace'): # emulate anonymous namespace return "namespace", "", True, None stmt_type = "" if end_token == "{": stmt_type = "block" if context == "block": print("Error at %d: should not call parse_stmt inside blocks" % (self.lineno,)) sys.exit(-1) if context == "class" or context == "struct": while 1: colon_pos = stmt.find(":") if colon_pos < 0: break w = stmt[:colon_pos].strip() if w in ["public", "protected", "private"]: if w == "public" or (not self.wrap_mode and w == "protected"): stack_top[self.PUBLIC_SECTION] = True else: stack_top[self.PUBLIC_SECTION] = False stmt = stmt[colon_pos+1:].strip() break # do not process hidden class members and template classes/functions if not stack_top[self.PUBLIC_SECTION] or stmt.startswith("template"): return stmt_type, "", False, None if end_token == "{": if not self.wrap_mode and stmt.startswith("typedef struct"): stmt_type = "struct" try: classname, bases, modlist = self.parse_class_decl(stmt[len("typedef "):]) except: print("Error at %s:%d" % (self.hname, self.lineno)) exit(1) if classname.startswith("_Ipl"): classname = classname[1:] decl = [stmt_type + " " + self.get_dotted_name(classname), "", modlist, [], None, docstring] if bases: decl[1] = ": " + ", ".join([self.get_dotted_name(b).replace(".","::") for b in bases]) return stmt_type, classname, True, decl if stmt.startswith("class") or stmt.startswith("struct"): stmt_type = stmt.split()[0] if stmt.strip() != stmt_type: try: classname, bases, modlist = self.parse_class_decl(stmt) except: print("Error at %s:%d" % (self.hname, self.lineno)) exit(1) decl = [] if ("CV_EXPORTS_W" in stmt) or ("CV_EXPORTS_AS" in stmt) or (not self.wrap_mode):# and ("CV_EXPORTS" in stmt)): decl = [stmt_type + " " + self.get_dotted_name(classname), "", modlist, [], None, docstring] if bases: decl[1] = ": " + ", ".join([self.get_dotted_name(b).replace(".","::") for b in bases]) return stmt_type, classname, True, decl if stmt.startswith("enum") or stmt.startswith("namespace"): # NB: Drop inheritance syntax for enum stmt = stmt.split(':')[0] stmt_list = stmt.rsplit(" ", 1) if len(stmt_list) < 2: stmt_list.append("") return stmt_list[0], stmt_list[1], True, None if stmt.startswith("extern") and "\"C\"" in stmt: return "namespace", "", True, None if end_token == "}" and context.startswith("enum"): decl = self.parse_enum(stmt) name = stack_top[self.BLOCK_NAME] return context, name, False, decl if end_token == ";" and stmt.startswith("typedef"): # TODO: handle typedef's more intelligently return stmt_type, "", False, None paren_pos = stmt.find("(") if paren_pos >= 0: # assume it's function or method declaration, # since we filtered off the other places where '(' can normally occur: # - code blocks # - function pointer typedef's decl = self.parse_func_decl(stmt, mat=mat, docstring=docstring) # we return parse_flag == False to prevent the parser to look inside function/method bodies # (except for tracking the nested blocks) return stmt_type, "", False, decl if (context == "struct" or context == "class") and end_token == ";" and stmt: # looks like it's member declaration; append the members to the class declaration class_decl = stack_top[self.CLASS_DECL] if ("CV_PROP" in stmt): # or (class_decl and ("/Map" in class_decl[2])): var_modlist = [] if "CV_PROP_RW" in stmt: var_modlist.append("/RW") stmt = self.batch_replace(stmt, [("CV_PROP_RW", ""), ("CV_PROP", "")]).strip() var_list = stmt.split(",") var_type, var_name1, modlist, argno = self.parse_arg(var_list[0], -1) var_list = [var_name1] + [i.strip() for i in var_list[1:]] for v in var_list: class_decl[3].append([var_type, v, "", var_modlist]) return stmt_type, "", False, None # something unknown return stmt_type, "", False, None def find_next_token(self, s, tlist, p=0): """ Finds the next token from the 'tlist' in the input 's', starting from position 'p'. Returns the first occurred token and its position, or ("", len(s)) when no token is found """ token = "" tpos = len(s) for t in tlist: pos = s.find(t, p) if pos < 0: continue if pos < tpos: tpos = pos token = t return token, tpos def parse(self, hname, wmode=True): """ The main method. Parses the input file. Returns the list of declarations (that can be print using print_decls) """ self.hname = hname decls = [] f = io.open(hname, 'rt', encoding='utf-8') linelist = list(f.readlines()) f.close() # states: SCAN = 0 # outside of a comment or preprocessor directive COMMENT = 1 # inside a multi-line comment DIRECTIVE = 2 # inside a multi-line preprocessor directive DOCSTRING = 3 # inside a multi-line docstring DIRECTIVE_IF_0 = 4 # inside a '#if 0' directive state = SCAN self.block_stack = [["file", hname, True, True, None]] block_head = "" docstring = "" self.lineno = 0 self.wrap_mode = wmode depth_if_0 = 0 for l0 in linelist: self.lineno += 1 #print(state, self.lineno, l0) l = l0.strip() # G-API specific aliases l = self.batch_replace(l, [ ("GAPI_EXPORTS", "CV_EXPORTS"), ("GAPI_EXPORTS_W", "CV_EXPORTS_W"), ("GAPI_EXPORTS_W_SIMPLE","CV_EXPORTS_W_SIMPLE"), ("GAPI_WRAP", "CV_WRAP"), ("GAPI_PROP", "CV_PROP"), ("GAPI_PROP_RW", "CV_PROP_RW"), ('defined(GAPI_STANDALONE)', '0'), ]) if state == SCAN and l.startswith("#"): state = DIRECTIVE # fall through to the if state == DIRECTIVE check if state == DIRECTIVE: if l.endswith("\\"): continue state = SCAN l = re.sub(r'//(.+)?', '', l).strip() # drop // comment if l in [ '#if 0', '#if defined(__OPENCV_BUILD)', '#ifdef __OPENCV_BUILD', '#if !defined(OPENCV_BINDING_PARSER)', '#ifndef OPENCV_BINDING_PARSER', ]: state = DIRECTIVE_IF_0 depth_if_0 = 1 continue if state == DIRECTIVE_IF_0: if l.startswith('#'): l = l[1:].strip() if l.startswith("if"): depth_if_0 += 1 continue if l.startswith("endif"): depth_if_0 -= 1 if depth_if_0 == 0: state = SCAN else: # print('---- {:30s}:{:5d}: {}'.format(hname[-30:], self.lineno, l)) pass continue if state == COMMENT: pos = l.find("*/") if pos < 0: continue l = l[pos+2:] state = SCAN if state == DOCSTRING: pos = l.find("*/") if pos < 0: docstring += l0 continue docstring += l[:pos] + "\n" l = l[pos+2:] state = SCAN if l.startswith('CV__') or l.startswith('__CV_'): # just ignore these lines #print('IGNORE: ' + l) state = SCAN continue if state != SCAN: print("Error at %d: invalid state = %d" % (self.lineno, state)) sys.exit(-1) while 1: # NB: Avoid parsing '{' for case: # foo(Obj&& = {}); if re.search(r'=\s*\{\s*\}', l): token, pos = ';', len(l) else: token, pos = self.find_next_token(l, [";", "\"", "{", "}", "//", "/*"]) if not token: block_head += " " + l block_head = block_head.strip() if len(block_head) > 0 and block_head[-1] == ')' and block_head.startswith('CV_ENUM_FLAGS('): l = '' token = ';' else: break if token == "//": block_head += " " + l[:pos] l = '' continue if token == "/*": block_head += " " + l[:pos] end_pos = l.find("*/", pos+2) if len(l) > pos + 2 and l[pos+2] == "*": # '/**', it's a docstring if end_pos < 0: state = DOCSTRING docstring = l[pos+3:] + "\n" break else: docstring = l[pos+3:end_pos] elif end_pos < 0: state = COMMENT break l = l[end_pos+2:] continue if token == "\"": pos2 = pos + 1 while 1: t2, pos2 = self.find_next_token(l, ["\\", "\""], pos2) if t2 == "": print("Error at %d: no terminating '\"'" % (self.lineno,)) sys.exit(-1) if t2 == "\"": break pos2 += 2 block_head += " " + l[:pos2+1] l = l[pos2+1:] continue stmt = (block_head + " " + l[:pos]).strip() stmt = " ".join(stmt.split()) # normalize the statement #print(stmt) stack_top = self.block_stack[-1] if stmt.startswith("@"): # Objective C ? break decl = None if stack_top[self.PROCESS_FLAG]: # even if stack_top[PUBLIC_SECTION] is False, we still try to process the statement, # since it can start with "public:" docstring = docstring.strip() stmt_type, name, parse_flag, decl = self.parse_stmt(stmt, token, docstring=docstring) if decl: if stmt_type.startswith("enum"): decls.append([stmt_type + " " + self.get_dotted_name(name), "", [], decl, None, ""]) else: decls.append(decl) if self._generate_gpumat_decls and ("cv.cuda" in decl[0] or decl[0] in [ "cv.imshow", # https://github.com/opencv/opencv/issues/18553 ]): # If function takes as one of arguments Mat or vector - we want to create the # same declaration working with GpuMat args = decl[3] has_mat = len(list(filter(lambda x: x[0] in {"Mat", "vector_Mat"}, args))) > 0 if has_mat: _, _, _, gpumat_decl = self.parse_stmt(stmt, token, mat="cuda::GpuMat", docstring=docstring) if gpumat_decl != decl: decls.append(gpumat_decl) if self._generate_umat_decls: # If function takes as one of arguments Mat or vector - we want to create the # same declaration working with UMat (this is important for T-Api access) args = decl[3] has_mat = len(list(filter(lambda x: x[0] in {"Mat", "vector_Mat"}, args))) > 0 if has_mat: _, _, _, umat_decl = self.parse_stmt(stmt, token, mat="UMat", docstring=docstring) if umat_decl != decl: decls.append(umat_decl) docstring = "" if stmt_type == "namespace": chunks = [block[1] for block in self.block_stack if block[0] == 'namespace'] + [name] self.namespaces.add('.'.join(chunks)) else: stmt_type, name, parse_flag = "block", "", False if token == "{": if stmt_type == "class": public_section = False else: public_section = True self.block_stack.append([stmt_type, name, parse_flag, public_section, decl]) if token == "}": if not self.block_stack: print("Error at %d: the block stack is empty" % (self.lineno,)) self.block_stack[-1:] = [] if pos+1 < len(l) and l[pos+1] == ';': pos += 1 block_head = "" l = l[pos+1:] return decls def print_decls(self, decls): """ Prints the list of declarations, retrieived by the parse() method """ for d in decls: print(d[0], d[1], ";".join(d[2])) # Uncomment below line to see docstrings # print('"""\n' + d[5] + '\n"""') for a in d[3]: print(" ", a[0], a[1], a[2], end="") if a[3]: print("; ".join(a[3])) else: print() if __name__ == '__main__': parser = CppHeaderParser(generate_umat_decls=True, generate_gpumat_decls=True) decls = [] for hname in opencv_hdr_list: decls += parser.parse(hname) #for hname in sys.argv[1:]: #decls += parser.parse(hname, wmode=False) parser.print_decls(decls) print(len(decls)) print("namespaces:", " ".join(sorted(parser.namespaces)))