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string19.rb
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string19.rb
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# -*- encoding: us-ascii -*-
class String
def self.try_convert(obj)
Rubinius::Type.try_convert obj, String, :to_str
end
def codepoints
return to_enum :codepoints unless block_given?
chars { |c| yield c.ord }
self
end
alias_method :each_codepoint, :codepoints
def encode!(to=undefined, from=undefined, options=undefined)
Rubinius.check_frozen
case to
when Encoding
to_enc = to
when Hash
options = to
to_enc = Encoding.default_internal
when undefined
to_enc = Encoding.default_internal
return self unless to_enc
else
opts = Rubinius::Type::check_convert_type to, Hash, :to_hash
if opts
options = opts
to_enc = Encoding.default_internal
else
to_enc = Rubinius::Type.try_convert_to_encoding to
end
end
case from
when undefined
from_enc = encoding
when Encoding
from_enc = from
when Hash
options = from
from_enc = encoding
else
opts = Rubinius::Type::check_convert_type from, Hash, :to_hash
if opts
options = opts
from_enc = encoding
else
from_enc = Rubinius::Type.coerce_to_encoding from
end
end
if from_enc.equal? undefined or to_enc.equal? undefined
raise Encoding::ConverterNotFoundError, "undefined code converter (#{from} to #{to})"
end
case options
when undefined
options = 0
when Hash
# do nothing
else
options = Rubinius::Type.coerce_to options, Hash, :to_hash
end
if ascii_only? and to_enc.ascii_compatible?
force_encoding to_enc
elsif to_enc and from_enc != to_enc
ec = Encoding::Converter.new from_enc, to_enc, options
dest = ""
status = ec.primitive_convert self, dest, nil, nil, ec.options
raise ec.last_error unless status == :finished
replace dest
end
# TODO: replace this hack with transcoders
if options.kind_of? Hash
case xml = options[:xml]
when :text
gsub!(/[&><]/, '&' => '&', '>' => '>', '<' => '<')
when :attr
gsub!(/[&><"]/, '&' => '&', '>' => '>', '<' => '<', '"' => '"')
insert(0, '"')
insert(-1, '"')
when nil
# nothing
else
raise ArgumentError, "unexpected value for xml option: #{xml.inspect}"
end
end
self
end
def encode(to=undefined, from=undefined, options=undefined)
dup.encode! to, from, options
end
def force_encoding(enc)
@ascii_only = @valid_encoding = nil
@encoding = Rubinius::Type.coerce_to_encoding enc
self
end
def inspect
result_encoding = Encoding.default_internal || Encoding.default_external
unless result_encoding.ascii_compatible?
result_encoding = Encoding::US_ASCII
end
enc = encoding
ascii = enc.ascii_compatible?
enc_name = enc.name
unicode = enc_name.start_with?("UTF-") && enc_name[4] != ?7
if unicode
if enc.equal? Encoding::UTF_16
a = getbyte 0
b = getbyte 1
if a == 0xfe and b == 0xff
enc = Encoding::UTF_16BE
elsif a == 0xff and b == 0xfe
enc = Encoding::UTF_16LE
else
unicode = false
end
elsif enc.equal? Encoding::UTF_32
a = getbyte 0
b = getbyte 1
c = getbyte 2
d = getbyte 3
if a == 0 and b == 0 and c == 0xfe and d == 0xfe
enc = Encoding::UTF_32BE
elsif a == 0xff and b == 0xfe and c == 0 and d == 0
enc = Encoding::UTF_32LE
else
unicode = false
end
end
end
array = []
index = 0
total = bytesize
while index < total
char = chr_at index
if char
bs = char.bytesize
if (ascii or unicode) and bs == 1
escaped = nil
byte = getbyte(index)
if byte >= 7 and byte <= 92
case byte
when 7 # \a
escaped = '\a'
when 8 # \b
escaped = '\b'
when 9 # \t
escaped = '\t'
when 10 # \n
escaped = '\n'
when 11 # \v
escaped = '\v'
when 12 # \f
escaped = '\f'
when 13 # \r
escaped = '\r'
when 27 # \e
escaped = '\e'
when 34 # \"
escaped = '\"'
when 35 # #
case getbyte(index += 1)
when 36 # $
escaped = '\#$'
when 64 # @
escaped = '\#@'
when 123 # {
escaped = '\#{'
else
index -= 1
end
when 92 # \\
escaped = '\\\\'
end
if escaped
array << escaped
index += 1
next
end
end
end
if char.printable?
array << char
else
code = char.ord
escaped = code.to_s(16).upcase
if unicode
if code < 0x10000
pad = "0" * (4 - escaped.bytesize)
array << "\\u#{pad}#{escaped}"
else
array << "\\u{#{escaped}}"
end
else
if code < 0x100
pad = "0" * (2 - escaped.bytesize)
array << "\\x#{pad}#{escaped}"
else
array << "\\x{#{escaped}}"
end
end
end
index += bs
else
array << "\\x#{getbyte(index).to_s(16)}"
index += 1
end
end
size = array.inject(0) { |s, chr| s += chr.bytesize }
result = String.pattern size + 2, ?".ord
m = Rubinius::Mirror.reflect result
index = 1
array.each do |chr|
m.copy_from chr, 0, chr.bytesize, index
index += chr.bytesize
end
Rubinius::Type.infect result, self
result.force_encoding result_encoding
end
def prepend(other)
self[0, 0] = other
self
end
def upto(stop, exclusive=false)
return to_enum :upto, stop, exclusive unless block_given?
stop = StringValue(stop)
if stop.size == 1 && size == 1
return self if self > stop
after_stop = stop.getbyte(0) + (exclusive ? 0 : 1)
current = getbyte(0)
until current == after_stop
yield current.chr
current += 1
end
else
unless stop.size < size
after_stop = exclusive ? stop : stop.succ
current = self
until current == after_stop
yield current
current = StringValue(current.succ)
break if current.size > stop.size || current.size == 0
end
end
end
self
end
def reverse!
Rubinius.check_frozen
return self if @num_bytes <= 1
self.modify!
@data.reverse(0, @num_bytes)
self
end
def sub!(pattern, replacement=undefined)
# Copied mostly from sub to keep Regexp.last_match= working right.
if replacement.equal?(undefined) and !block_given?
raise ArgumentError, "wrong number of arguments (1 for 2)"
end
unless pattern
raise ArgumentError, "wrong number of arguments (0 for 2)"
end
Rubinius.check_frozen
if match = Rubinius::Type.coerce_to_regexp(pattern, true).match_from(self, 0)
out = match.pre_match
Regexp.last_match = match
if replacement.equal?(undefined)
replacement = yield(match[0].dup).to_s
out.taint if replacement.tainted?
out.append(replacement).append(match.post_match)
else
out.taint if replacement.tainted?
replacement = StringValue(replacement).to_sub_replacement(out, match)
out.append(match.post_match)
end
# We have to reset it again to match the specs
Regexp.last_match = match
out.taint if self.tainted?
else
out = self
Regexp.last_match = nil
return nil
end
replace(out)
return self
end
def slice!(one, two=undefined)
Rubinius.check_frozen
# This is un-DRY, but it's a simple manual argument splitting. Keeps
# the code fast and clean since the sequence are pretty short.
#
if two.equal?(undefined)
result = slice(one)
if one.kind_of? Regexp
lm = Regexp.last_match
self[one] = '' if result
Regexp.last_match = lm
else
self[one] = '' if result
end
else
result = slice(one, two)
if one.kind_of? Regexp
lm = Regexp.last_match
self[one, two] = '' if result
Regexp.last_match = lm
else
self[one, two] = '' if result
end
end
result
end
# TODO: make encoding aware.
def succ!
self.modify!
return self if @num_bytes == 0
carry = nil
last_alnum = 0
start = @num_bytes - 1
ctype = Rubinius::CType
while start >= 0
s = @data[start]
if ctype.isalnum(s)
carry = 0
if (48 <= s && s < 57) ||
(97 <= s && s < 122) ||
(65 <= s && s < 90)
@data[start] += 1
elsif s == 57
@data[start] = 48
carry = 49
elsif s == 122
@data[start] = carry = 97
elsif s == 90
@data[start] = carry = 65
end
break if carry == 0
last_alnum = start
end
start -= 1
end
if carry.nil?
start = length - 1
carry = 1
while start >= 0
if @data[start] >= 255
@data[start] = 0
else
@data[start] += 1
break
end
start -= 1
end
end
if start < 0
m = Rubinius::Mirror.reflect self
m.splice last_alnum, 1, carry.chr + @data[last_alnum].chr
end
return self
end
alias_method :next, :succ
alias_method :next!, :succ!
def to_c
Complexifier.new(self).convert
end
def to_r
Rationalizer.new(self).convert
end
def unpack(directives)
Rubinius.primitive :string_unpack19
unless directives.kind_of? String
return unpack(StringValue(directives))
end
raise ArgumentError, "invalid directives string: #{directives}"
end
def rstrip!
Rubinius.check_frozen
return if @num_bytes == 0
stop = @num_bytes - 1
ctype = Rubinius::CType
while stop >= 0 && (@data[stop] == 0 || ctype.isspace(@data[stop]))
stop -= 1
end
return if (stop += 1) == @num_bytes
modify!
self.num_bytes = stop
self
end
def lstrip!
Rubinius.check_frozen
return if @num_bytes == 0
start = 0
ctype = Rubinius::CType
while start < @num_bytes && ctype.isspace(@data[start])
start += 1
end
return if start == 0
modify!
self.num_bytes -= start
@data.move_bytes start, @num_bytes, 0
self
end
def chop!
Rubinius.check_frozen
m = Rubinius::Mirror.reflect self
bytes = m.previous_byte_index @num_bytes
return unless bytes
chr = chr_at bytes
if chr.ord == 10 and chr.ascii?
if i = m.previous_byte_index(bytes)
chr = chr_at i
bytes = i if chr.ord == 13 and chr.ascii?
end
end
self.num_bytes = bytes
# We do not need to dup the data, so don't use #modify!
@hash_value = nil
self
end
def chomp!(sep=undefined)
Rubinius.check_frozen
if sep.equal? undefined
sep = $/
elsif sep
sep = StringValue(sep)
end
return if sep.nil?
m = Rubinius::Mirror.reflect self
if sep == DEFAULT_RECORD_SEPARATOR
return unless bytes = m.previous_byte_index(@num_bytes)
chr = chr_at bytes
return unless chr.ascii?
code = chr.ord
case chr.ord
when 13
# do nothing
when 10
if j = m.previous_byte_index(bytes)
chr = chr_at j
if chr.ord == 13 and chr.ascii?
bytes = j
end
end
else
return
end
elsif sep.size == 0
return if @num_bytes == 0
bytes = @num_bytes
while i = m.previous_byte_index(bytes)
chr = chr_at i
break unless chr.ord == 10 and chr.ascii?
bytes = i
if j = m.previous_byte_index(i)
chr = chr_at j
if chr.ord == 13 and chr.ascii?
bytes = j
end
end
end
return if bytes == @num_bytes
else
size = sep.size
return if size > @num_bytes
# TODO: Move #compare_substring to mirror.
return unless sep.compare_substring(self, -size, size) == 0
bytes = @num_bytes - size
end
# We do not need to dup the data, so don't use #modify!
@hash_value = nil
self.num_bytes = bytes
self
end
def clear
Rubinius.check_frozen
self.num_bytes = 0
self
end
def replace(other)
Rubinius.check_frozen
# If we're replacing with ourselves, then we have nothing to do
return self if equal?(other)
other = StringValue(other)
@shared = true
other.shared!
@data = other.__data__
self.num_bytes = other.num_bytes
@hash_value = nil
force_encoding(other.encoding)
Rubinius::Type.infect(self, other)
end
def initialize_copy(other)
end
def <<(other)
modify!
unless other.kind_of? String
if other.kind_of? Integer
if encoding == Encoding::US_ASCII and other >= 128 and other < 256
force_encoding(Encoding::ASCII_8BIT)
end
other = other.chr(encoding)
else
other = StringValue(other)
end
end
Rubinius::Type.infect(self, other)
append(other)
end
alias_method :concat, :<<
def chr
substring 0, 1
end
def lines(sep=$/)
return to_enum(:lines, sep) unless block_given?
# weird edge case.
if sep.nil?
yield self
return self
end
sep = StringValue(sep)
pos = 0
size = @num_bytes
orig_data = @data
# If the separator is empty, we're actually in paragraph mode. This
# is used so infrequently, we'll handle it completely separately from
# normal line breaking.
if sep.empty?
sep = "\n\n"
pat_size = 2
while pos < size
nxt = find_string(sep, pos)
break unless nxt
while @data[nxt] == 10 and nxt < @num_bytes
nxt += 1
end
match_size = nxt - pos
# string ends with \n's
break if pos == @num_bytes
str = byteslice pos, match_size
yield str unless str.empty?
# detect mutation within the block
if !@data.equal?(orig_data) or @num_bytes != size
raise RuntimeError, "string modified while iterating"
end
pos = nxt
end
# No more separates, but we need to grab the last part still.
fin = byteslice pos, @num_bytes - pos
yield fin if fin and !fin.empty?
else
# This is the normal case.
pat_size = sep.size
unmodified_self = clone
while pos < size
nxt = unmodified_self.find_string(sep, pos)
break unless nxt
match_size = nxt - pos
str = unmodified_self.byteslice pos, match_size + pat_size
yield str unless str.empty?
pos = nxt + pat_size
end
# No more separates, but we need to grab the last part still.
fin = unmodified_self.byteslice pos, @num_bytes - pos
yield fin unless fin.empty?
end
self
end
alias_method :each_line, :lines
def gsub(pattern, replacement=undefined)
# Because of the behavior of $~, this is duplicated from gsub! because
# if we call gsub! from gsub, the last_match can't be updated properly.
if undefined.equal? replacement
unless block_given?
return to_enum(:gsub, pattern, replacement)
end
use_yield = true
tainted = false
else
tainted = replacement.tainted?
untrusted = replacement.untrusted?
unless replacement.kind_of?(String)
hash = Rubinius::Type.check_convert_type(replacement, Hash, :to_hash)
replacement = StringValue(replacement) unless hash
tainted ||= replacement.tainted?
untrusted ||= replacement.untrusted?
end
use_yield = false
end
pattern = Rubinius::Type.coerce_to_regexp(pattern, true) unless pattern.kind_of? Regexp
match = pattern.search_region(self, 0, @num_bytes, true)
unless match
Regexp.last_match = nil
end
orig_len = @num_bytes
orig_data = @data
last_end = 0
offset = nil
last_match = nil
ret = byteslice(0, 0) # Empty string and string subclass
offset = match.full.at(0) if match
while match
if str = match.pre_match_from(last_end)
ret.append str
end
if use_yield || hash
Regexp.last_match = match
if use_yield
val = yield match.to_s
else
val = hash[match.to_s]
end
untrusted = true if val.untrusted?
val = val.to_s unless val.kind_of?(String)
tainted ||= val.tainted?
ret.append val
if !@data.equal?(orig_data) or @num_bytes != orig_len
raise RuntimeError, "string modified"
end
else
replacement.to_sub_replacement(ret, match)
end
tainted ||= val.tainted?
last_end = match.full.at(1)
if match.collapsing?
if char = find_character(offset)
offset += char.bytesize
else
offset += 1
end
else
offset = match.full.at(1)
end
last_match = match
match = pattern.match_from self, offset
break unless match
offset = match.full.at(0)
end
Regexp.last_match = last_match
str = byteslice(last_end, @num_bytes-last_end+1)
if str
ret.append str
end
ret.taint if tainted
ret.untrust if untrusted
ret
end
def gsub!(pattern, replacement=undefined)
# Because of the behavior of $~, this is duplicated from gsub! because
# if we call gsub! from gsub, the last_match can't be updated properly.
if undefined.equal? replacement
unless block_given?
return to_enum(:gsub, pattern, replacement)
end
Rubinius.check_frozen
use_yield = true
tainted = false
else
Rubinius.check_frozen
tainted = replacement.tainted?
untrusted = replacement.untrusted?
unless replacement.kind_of?(String)
hash = Rubinius::Type.check_convert_type(replacement, Hash, :to_hash)
replacement = StringValue(replacement) unless hash
tainted ||= replacement.tainted?
untrusted ||= replacement.untrusted?
end
use_yield = false
end
pattern = Rubinius::Type.coerce_to_regexp(pattern, true) unless pattern.kind_of? Regexp
match = pattern.search_region(self, 0, @num_bytes, true)
unless match
Regexp.last_match = nil
return nil
end
orig_len = @num_bytes
orig_data = @data
last_end = 0
offset = nil
last_match = nil
ret = byteslice(0, 0) # Empty string and string subclass
offset = match.full.at(0)
while match
if str = match.pre_match_from(last_end)
ret.append str
end
if use_yield || hash
Regexp.last_match = match
if use_yield
val = yield match.to_s
else
val = hash[match.to_s]
end
untrusted = true if val.untrusted?
val = val.to_s unless val.kind_of?(String)
tainted ||= val.tainted?
ret.append val
if !@data.equal?(orig_data) or @num_bytes != orig_len
raise RuntimeError, "string modified"
end
else
replacement.to_sub_replacement(ret, match)
end
tainted ||= val.tainted?
last_end = match.full.at(1)
if match.collapsing?
if char = find_character(offset)
offset += char.bytesize
else
offset += 1
end
else
offset = match.full.at(1)
end
last_match = match
match = pattern.match_from self, offset
break unless match
offset = match.full.at(0)
end
Regexp.last_match = last_match
str = byteslice(last_end, @num_bytes-last_end+1)
if str
ret.append str
end
ret.taint if tainted
ret.untrust if untrusted
replace(ret)
self
end
def match(pattern, pos=0)
pattern = Rubinius::Type.coerce_to_regexp(pattern) unless pattern.kind_of? Regexp
m = Rubinius::Mirror.reflect self
pos = m.character_to_byte_index pos
match_data = pattern.search_region(self, pos, @num_bytes, true)
Regexp.last_match = match_data
if match_data && block_given?
yield match_data
else
match_data
end
end
def []=(index, count_or_replacement, replacement=undefined)
if replacement.equal? undefined
replacement = count_or_replacement
count = nil
else
count = count_or_replacement
end
m = Rubinius::Mirror.reflect self
case index
when Fixnum
index += size if index < 0
if index < 0 or index > size
raise IndexError, "index #{index} out of string"
end
unless bi = m.byte_index(index)
raise IndexError, "unable to find character at: #{index}"
end
if count
count = Rubinius::Type.coerce_to count, Fixnum, :to_int
if count < 0
raise IndexError, "count is negative"
end
total = index + count
if total >= size
bs = bytesize - bi
else
bs = m.byte_index(total) - bi
end
else
bs = index == size ? 0 : m.byte_index(index + 1) - bi
end
replacement = StringValue replacement
enc = Rubinius::Type.compatible_encoding self, replacement
m.splice bi, bs, replacement
when String
unless start = m.byte_index(index)
raise IndexError, "string not matched"
end
replacement = StringValue replacement
enc = Rubinius::Type.compatible_encoding self, replacement
m.splice start, index.bytesize, replacement
when Range
start = Rubinius::Type.coerce_to index.first, Fixnum, :to_int
start += size if start < 0
if start < 0 or start > size
raise RangeError, "#{index.first} is out of range"
end
unless bi = m.byte_index(start)
raise IndexError, "unable to find character at: #{start}"
end
stop = Rubinius::Type.coerce_to index.last, Fixnum, :to_int
stop += size if stop < 0
stop -= 1 if index.exclude_end?