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
|
# by Josh Goebel
module CodeRay module Scanners
class SQL < Scanner
register_for :sql
RESERVED_WORDS = [
'create','table','index','trigger','drop',
'primary','key',
'select','insert','update','vacuum','delete','merge','replace','truncate',
'into','on','from','values',
'after','before',
'and','or',
'count','min','max','group','order','by','avg',
'where','join','inner','outer','unique','union',
'transaction',
'begin','end',
]
PREDEFINED_TYPES = [
'char','varchar','enum','set','binary',
'text','tinytext','mediumtext','longtext',
'blob','tinyblob','mediumblob','longblob',
'timestamp','date','time','datetime','year',
'double','decimal','float',
'int','integer','tinyint','mediumint','bigint',
'bit','bool','boolean'
]
PREDEFINED_CONSTANTS = [
'null', 'true', 'false', 'not'
]
SQL_KIND= CaseIgnoringWordList.new(:ident).
add(RESERVED_WORDS, :reserved).
add(PREDEFINED_TYPES, :pre_type).
add(PREDEFINED_CONSTANTS, :pre_constant)
IDENT_KIND = WordList.new(:ident)
ESCAPE = / [rbfnrtv\n\\\/'"] | x[a-fA-F0-9]{1,2} | [0-7]{1,3} /x
UNICODE_ESCAPE = / u[a-fA-F0-9]{4} | U[a-fA-F0-9]{8} /x
def scan_tokens tokens, options
state = :initial
string_type = nil
until eos?
kind = :error
match = nil
if state == :initial
if scan(/ ^ -- .* $ /x)
kind = :comment
elsif scan(/ \s+ | \\\n /x)
kind = :space
elsif scan(%r! // [^\n\\]* (?: \\. [^\n\\]* )* | /\* (?: .*? \*/ | .* ) !mx)
kind = :comment
elsif match = scan(/ \# \s* if \s* 0 /x)
match << scan_until(/ ^\# (?:elif|else|endif) .*? $ | \z /xm) unless eos?
kind = :comment
elsif scan(/ [-+*\/=<>?:;,!&^|()\[\]{}~%] | \.(?!\d) /x)
kind = :operator
elsif match = scan(/ [A-Za-z_][A-Za-z_0-9]* /x)
kind = SQL_KIND[match.downcase]
kind = IDENT_KIND[match] if kind.nil?
elsif match = scan(/[`"']/)
tokens << [:open, :string]
string_type = matched
state = :string
kind = :delimiter
elsif scan(/0[xX][0-9A-Fa-f]+/)
kind = :hex
elsif scan(/(?:0[0-7]+)(?![89.eEfF])/)
kind = :octal
elsif scan(/(?:\d+)(?![.eEfF])/)
kind = :integer
elsif scan(/\d[fF]?|\d*\.\d+(?:[eE][+-]?\d+)?[fF]?|\d+[eE][+-]?\d+[fF]?/)
kind = :float
else
getch
end
elsif state == :string
if scan(/[^\\"'`]+/)
kind = :content
elsif scan(/["'`]/)
if string_type==matched
tokens << [matched, :delimiter]
tokens << [:close, :string]
state = :initial
string_type=nil
next
else
kind = :content
end
elsif scan(/ \\ (?: #{ESCAPE} | #{UNICODE_ESCAPE} ) /mox)
kind = :content
elsif scan(/ \\ | $ /x)
kind = :error
state = :initial
else
raise "else case \" reached; %p not handled." % peek(1), tokens
end
else
raise 'else-case reached', tokens
end
match ||= matched
# raise [match, kind], tokens if kind == :error
tokens << [match, kind]
end
# RAILS_DEFAULT_LOGGER.info tokens.inspect
tokens
end
end
end end
|
