PyCPlagIdent/detector.py at master · tmars/PyCPlagIdent · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
import time, os
from config_container import Config
from sc.extractor import SCExtractor
from sc.decorator import SCFileDecorator

class PlagiarismDetector(object):
    def __init__(self, fast_analyzer, detailed_analyzer, repo):
        self.__fast_analyzer = fast_analyzer
        self.__fast_min_sim = 0.5

        self.__detailed_analyzer = detailed_analyzer
        self.__detailed_min_sim = 0.8

        self.__logger = None

        self.__repo = repo
        self.__prog_canditates = self.__repo.get_programs()
        self.__func_canditates = self.__repo.get_functions()

    def __extracted_program(self, prog):
        text = SCExtractor.extract_program(prog.source_code)
        return text

    def __extracted_function(self, prog, func):
        text = SCExtractor.extract_function(prog.source_code, func.name)
        return text

    def set_logger(self, logger):
        self.__logger = logger

    def set_minimal_sim_values(self, fast_min_sim, detailed_min_sim):
        self.__fast_min_sim = fast_min_sim
        self.__detailed_min_sim = detailed_min_sim

    def __select_result(self, canditates, target, sim_func, min_sim_value = 0.8):
        result = []

        for obj in canditates:
            sim = sim_func(obj, target)

            self.__logger.info("sim %s([%s], [%s]) = %f" % (type(obj), obj.name, target.name, sim))

            if sim > min_sim_value:
                result.append(obj)

        return result

    #return [(prog, func, fast_similiraty, detailed_similiraty)]
    def find_sim_funcs(self, target):
        canditates = self.__func_canditates

        start = time.time()
        primary = self.__select_result(canditates, target, self.__fast_analyzer.sim_functions, self.__fast_min_sim)
        self.__logger.info("fast analyze from %d functions for %f detaileds" % (len(canditates), time.time() - start))

        start = time.time()
        result = self.__select_result(primary, target, self.__detailed_analyzer.sim_functions, self.__detailed_min_sim)
        self.__logger.info("detailed analyze from %d functions for %f detaileds" % (len(primary), time.time() - start))

        ret = []
        for func in result:
            prog = self.__repo.get_program(func.prog_id)
            fast = self.__fast_analyzer.sim_functions(func, target)
            detailed = self.__detailed_analyzer.sim_functions(func, target)
            ret.append((prog, func, fast, detailed))

        return ret

    #return [(prog, fast_similiraty, detailed_similiraty)]
    def find_sim_progs(self, target):
        canditates = self.__prog_canditates

        start = time.time()
        primary = self.__select_result(canditates, target, self.__fast_analyzer.sim_programs, self.__fast_min_sim)
        self.__logger.info("fast analyze from %d programs for %f detaileds" % (len(canditates), time.time() - start))

        for prog in primary:
            prog.functions = self.__repo.get_functions(prog.id)

        start = time.time()
        result = self.__select_result(primary, target, self.__detailed_analyzer.sim_programs, self.__detailed_min_sim)
        self.__logger.info("detailed analyze from %d programs for %f detaileds" % (len(primary), time.time() - start))

        ret = []
        for prog in result:
            fast = self.__fast_analyzer.sim_programs(prog, target)
            detailed = self.__detailed_analyzer.sim_programs(prog, target)
            ret.append((prog, fast, detailed))

        return ret

    def save_progs(self, progs):
        for prog in progs:
            self.__repo.insert_program(prog)

    def clear(self):
        return self.__repo.clear()

    def info(self):
        return self.__repo.info()

    def extract_programs(self, target, data, out_dir):
        out_dir += "/" + target.name
        if not os.path.exists(out_dir):
            os.makedirs(out_dir)

        filename_src = "%s/src.c" %(out_dir)
        filename_sim = "%s/sim.c" %(out_dir)

        src = SCFileDecorator(filename_src)
        src.write_comment(["generated with %s %s" % (Config.get('package'), Config.get('version'))])
        src.write_comment(["source code of", "target program=%s" % (target.name)])
        src.write(self.__extracted_program(target))
        src.write_comment(["end of source code"])
        del src

        src = SCFileDecorator(filename_sim)
        src.write_comment(["generated with %s %s" % (Config.get('package'), Config.get('version'))])
        src.write_comment(["source code of", "similar programs"])

        for prog,f,s in data:
            src.write_comment([
                "program=%s" % (target.name),
                "f.sim=%f" % (f),
                "s.sim=%f" % (s),
            ])
            src.write(self.__extracted_program(prog))
            src.write_comment(["end of program=%s" % (prog.name)])

        del src

    def extract_functions(self, target_prog, target, data, out_dir):
        out_dir += "/%s/funcs/%s" % (target_prog.name, target.name)
        if not os.path.exists(out_dir):
            os.makedirs(out_dir)

        filename_src = "%s/src.c" % (out_dir)
        filename_sim = "%s/sim.c" % (out_dir)

        src = SCFileDecorator(filename_src)
        src.write_comment(["generated with %s %s" % (Config.get('package'), Config.get('version'))])
        src.write_comment(["source code of", "target function=%s" % (target.name)])
        src.write(self.__extracted_function(target_prog, target))
        src.write_comment(["end of source code"])
        del src

        src = SCFileDecorator(filename_sim)
        src.write_comment(["generated with %s %s" % (Config.get('package'), Config.get('version'))])
        src.write_comment(["source code of", "similar functions"])

        for prog,func,f,s in data:
            src.write_comment([
                "program=%s" % (prog.name),
                "function=%s" % (func.name),
                "f.sim=%f" % (f),
                "s.sim=%f" % (s)
            ])
            src.write(self.__extracted_function(prog, func))
            src.write_comment(["end of function=%s" % (func.name)])

        del src