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
|
from ply import lex
from ply import yacc
def scanacfile(acfile):
tokens = (
"FUNC",
"FUNCOPT", #func options
"FUNCEND",
"VAR",
"ECHO",
"TEXT",
"IF",
"ELSE",
"THEN",
"IFEND",
"CASE",
"CASEEND",
)
states = (
("func", "exclusive"),
("funcopt", "exclusive"),
)
def t_ANY_contline(t):
r"\\\n"
t.lexer.lineno += 1
pass
def t_ANY_space(t):
r"[ \t]"
pass
def t_ANY_newline(t):
r"\n"
t.lexer.lineno += 1
pass
def t_INITIAL_func_FUNC(t):
r'[a-zA-Z_][a-zA-Z0-9_]*\('
t.lexer.push_state('func')
t.value = t.value[:-1] #return name of func
return t
def t_func_funcopt(t):
r'\['
t.lexer.code_start = t.lexer.lexpos # Record the starting position
t.lexer.level = 1 # Initial level
t.lexer.push_state('funcopt') # Enter 'ccode' state
# Rules for the ccode state
def t_funcopt_newcom(t):
r'\['
t.lexer.level +=1
def t_funcopt_endcom(t):
r'\]'
t.lexer.level -=1
# If closing command, return the code fragment
if t.lexer.level == 0:
t.value = t.lexer.lexdata[t.lexer.code_start-1:t.lexer.lexpos]
t.type = "FUNCOPT"
t.lexer.lineno += t.value.count('\n')
t.lexer.pop_state()
return t
def t_funcopt_opt(t):
r"[^\\\[\]]+"
def t_func_FUNCOPT(t):
r"[^\\\(\)\[\],]+"
t.lexer.lineno += t.value.count('\n')
return t
def t_func_comma(t):
r"[ \t]*,[ \t]*"
pass
def t_func_FUNCEND(t):
r"\)"
t.lexer.pop_state()
return t
def t_comment(t):
r"(dnl|\#).*\n"
t.lexer.lineno += t.value.count('\n')
pass
def t_ECHO(t):
r"echo.*\n"
t.lexer.lineno += t.value.count('\n')
return t
def t_VAR(t):
r"[a-zA-Z_][a-zA-Z0-9_]*=([^\\\n]|\\\n)*\n"
return t
def t_IF(t):
r"if"
return t
def t_THEN(t):
r"then"
return t
def t_ELSE(t):
r"else"
return t
def t_IFEND(t):
r"fi"
return t
def t_CASE(t):
r"case.*in"
return t
def t_CASEEND(t):
r"esac"
return t
def t_literal(t):
r"\\[^\n]"
t.type = "TEXT"
t.value = t.value[-1] #return litral char
return t
def t_TEXT(t):
r"[^ \t\n\(\)]+"
return t
def t_ANY_error(t):
print("Illegal character '%s'" % t.value[0])
t.lexer.skip(1)
lexer = lex.lex()
lexer.input(acfile)
for tok in lexer:
print(tok)
file="configure.in"
with open(file, encoding="utf-8", errors="replace") as inputfile:
scanacfile(inputfile.read())
|