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module CodeRay module Scanners
# by Josh Goebel
class SQL < Scanner
register_for :sql
RESERVED_WORDS = %w(
all and as before begin by case collate
constraint create else end engine exists
for foreign from group if inner is join key
like not on or order outer primary references replace
then to trigger union using values when where
left right distinct
)
OBJECTS = %w(
database databases table tables column columns index
)
COMMANDS = %w(
add alter comment create delete drop grant insert into select update set
show
)
PREDEFINED_TYPES = %w(
char varchar enum binary text tinytext mediumtext
longtext blob tinyblob mediumblob longblob timestamp
date time datetime year double decimal float int
integer tinyint mediumint bigint smallint unsigned bit
bool boolean hex bin oct
)
PREDEFINED_FUNCTIONS = %w( sum cast substring abs pi count min max avg now )
DIRECTIVES = %w( auto_increment unique default charset )
PREDEFINED_CONSTANTS = %w( null true false )
IDENT_KIND = CaseIgnoringWordList.new(:ident).
add(RESERVED_WORDS, :reserved).
add(OBJECTS, :type).
add(COMMANDS, :class).
add(PREDEFINED_TYPES, :pre_type).
add(PREDEFINED_CONSTANTS, :pre_constant).
add(PREDEFINED_FUNCTIONS, :predefined).
add(DIRECTIVES, :directive)
ESCAPE = / [rbfntv\n\\\/'"] | x[a-fA-F0-9]{1,2} | [0-7]{1,3} | . /mx
UNICODE_ESCAPE = / u[a-fA-F0-9]{4} | U[a-fA-F0-9]{8} /x
STRING_PREFIXES = /[xnb]|_\w+/i
def scan_tokens tokens, options
state = :initial
string_type = nil
string_content = ''
until eos?
kind = nil
match = nil
if state == :initial
if scan(/ \s+ | \\\n /x)
kind = :space
elsif scan(/^(?:--\s?|#).*/)
kind = :comment
elsif scan(%r( /\* (!)? (?: .*? \*/ | .* ) )mx)
kind = self[1] ? :directive : :comment
elsif scan(/ [-+*\/=<>;,!&^|()\[\]{}~%] | \.(?!\d) /x)
kind = :operator
elsif scan(/(#{STRING_PREFIXES})?([`"'])/o)
prefix = self[1]
string_type = self[2]
tokens << [:open, :string]
tokens << [prefix, :modifier] if prefix
match = string_type
state = :string
kind = :delimiter
elsif match = scan(/ @? [A-Za-z_][A-Za-z_0-9]* /x)
# FIXME: Don't match keywords after "."
kind = match[0] == ?@ ? :variable : IDENT_KIND[match.downcase]
elsif scan(/0[xX][0-9A-Fa-f]+/)
kind = :hex
elsif scan(/0[0-7]+(?![89.eEfF])/)
kind = :oct
elsif scan(/(?>\d+)(?![.eEfF])/)
kind = :integer
elsif scan(/\d[fF]|\d*\.\d+(?:[eE][+-]?\d+)?|\d+[eE][+-]?\d+/)
kind = :float
elsif scan(/\\N/)
kind = :pre_constant
else
getch
kind = :error
end
elsif state == :string
if match = scan(/[^\\"'`]+/)
string_content << match
next
elsif match = scan(/["'`]/)
if string_type == match
if peek(1) == string_type # doubling means escape
string_content << string_type << getch
next
end
unless string_content.empty?
tokens << [string_content, :content]
string_content = ''
end
tokens << [matched, :delimiter]
tokens << [:close, :string]
state = :initial
string_type = nil
next
else
string_content << match
end
next
elsif scan(/ \\ (?: #{ESCAPE} | #{UNICODE_ESCAPE} ) /mox)
unless string_content.empty?
tokens << [string_content, :content]
string_content = ''
end
kind = :char
elsif match = scan(/ \\ . /mox)
string_content << match
next
elsif scan(/ \\ | $ /x)
unless string_content.empty?
tokens << [string_content, :content]
string_content = ''
end
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
unless kind
raise_inspect 'Error token %p in line %d' %
[[match, kind], line], tokens, state
end
raise_inspect 'Empty token', tokens unless match
tokens << [match, kind]
end
tokens
end
end
end end
|
