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string19.rb
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string19.rb
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# -*- encoding: us-ascii -*-
class String
def self.allocate
str = super()
str.__data__ = Rubinius::ByteArray.new(1)
str.num_bytes = 0
str.force_encoding(Encoding::BINARY)
str
end
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=nil)
Rubinius.check_frozen
# TODO
if to.equal? undefined
to = Encoding.default_internal
else
to = Rubinius::Type.coerce_to_encoding to
end
force_encoding to
self
end
def encode(to=undefined, from=undefined, options=nil)
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 prepend(other)
self[0,0] = other
self
end
def delete!(*strings)
raise ArgumentError, "wrong number of arguments" if strings.empty?
strings.each do |string|
if string =~ /.+\-.+/
ranges_found = string.scan(/\w{1}\-\w{1}/)
ranges_found.map{ |range| range.gsub(/-/, '').split('') }.each do |range_array|
raise ArgumentError, "invalid range #{strings} in string transliteration" unless range_array == range_array.sort
end
end
end
self.modify!
table = count_table(*strings).__data__
i, j = 0, -1
while i < @num_bytes
c = @data[i]
unless table[c] == 1
@data[j+=1] = c
end
i += 1
end
if (j += 1) < @num_bytes
self.num_bytes = j
self
else
nil
end
end
def upto(stop, exclusive=false)
return to_enum :upto, stop, exclusive unless block_given?
stop = StringValue(stop)
return self if self > stop
if stop.size == 1 && size == 1
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 squeeze!(*strings)
if strings.first =~ /.+\-.+/
range = strings.first.gsub(/-/, '').split('')
raise ArgumentError, "invalid range #{strings} in string transliteration" unless range == range.sort
end
return if @num_bytes == 0
self.modify!
table = count_table(*strings).__data__
i, j, last = 1, 0, @data[0]
while i < @num_bytes
c = @data[i]
unless c == last and table[c] == 1
@data[j+=1] = last = c
end
i += 1
end
if (j += 1) < @num_bytes
self.num_bytes = j
self
else
nil
end
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
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
return if @num_bytes == 0
self.modify!
if @num_bytes > 1 and
@data[@num_bytes-1] == 10 and @data[@num_bytes-2] == 13
self.num_bytes -= 2
else
self.num_bytes -= 1
end
self
end
# NOTE: TypeError is raised in String#replace and not in String#chomp! when
# self is frozen. This is intended behaviour.
def chomp!(sep=undefined)
Rubinius.check_frozen
# special case for performance. No seperator is by far the most common usage.
if sep.equal?(undefined)
return if @num_bytes == 0
c = @data[@num_bytes-1]
if c == 10 # ?\n
self.num_bytes -= 1 if @num_bytes > 1 && @data[@num_bytes-2] == 13 # ?\r
elsif c != 13 # ?\r
return
end
# don't use modify! because it will dup the data when we don't need to.
@hash_value = nil
self.num_bytes -= 1
return self
end
return if sep.nil? || @num_bytes == 0
sep = StringValue sep
if (sep == $/ && sep == DEFAULT_RECORD_SEPARATOR) || sep == "\n"
c = @data[@num_bytes-1]
if c == 10 # ?\n
self.num_bytes -= 1 if @num_bytes > 1 && @data[@num_bytes-2] == 13 # ?\r
elsif c != 13 # ?\r
return
end
# don't use modify! because it will dup the data when we don't need to.
@hash_value = nil
self.num_bytes -= 1
elsif sep.size == 0
size = @num_bytes
while size > 0 && @data[size-1] == 10 # ?\n
if size > 1 && @data[size-2] == 13 # ?\r
size -= 2
else
size -= 1
end
end
return if size == @num_bytes
# don't use modify! because it will dup the data when we don't need to.
@hash_value = nil
self.num_bytes = size
else
size = sep.size
return if size > @num_bytes || sep.compare_substring(self, -size, size) != 0
# don't use modify! because it will dup the data when we don't need to.
@hash_value = nil
self.num_bytes -= size
end
return self
end
def replace(other)
Rubinius.check_frozen
# If we're replacing with ourselves, then we have nothing to do
return self if equal?(other)
other = StringValue(other)
@shared = true
other.shared!
@data = other.__data__
self.num_bytes = other.num_bytes
@hash_value = nil
force_encoding(other.encoding)
Rubinius::Type.infect(self, other)
end
alias_method :initialize_copy, :replace
# private :initialize_copy
def <<(other)
modify!
if other.kind_of? Integer
if encoding == Encoding::US_ASCII and other >= 128 and other < 256
force_encoding(Encoding::ASCII_8BIT)
end
other = other.chr(encoding)
end
unless other.kind_of? String
other = StringValue(other)
end
unless other.encoding == encoding
enc = Rubinius::Type.compatible_encoding self, other
force_encoding enc
end
Rubinius::Type.infect(self, other)
append(other)
end
alias_method :concat, :<<
def chr
substring 0, 1
end
def lines(sep=$/)
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)
unless block_given? or replacement != undefined
return to_enum(:gsub, pattern, replacement)
end
tainted = false
untrusted = untrusted?
if replacement.equal?(undefined)
use_yield = true
else
tainted = replacement.tainted?
untrusted ||= replacement.untrusted?
hash = Rubinius::Type.check_convert_type(replacement, Hash, :to_hash)
replacement = StringValue(replacement) unless hash
tainted ||= replacement.tainted?
untrusted ||= replacement.untrusted?
use_yield = false
end
pattern = Rubinius::Type.coerce_to_regexp(pattern, true)
orig_len = @num_bytes
orig_data = @data
last_end = 0
offset = nil
ret = byteslice 0, 0 # Empty string and string subclass
last_match = nil
match = pattern.match_from self, last_end
if match
ma_range = match.full
ma_start = ma_range.at(0)
ma_end = ma_range.at(1)
offset = ma_start
end
while match
nd = ma_start - 1
pre_len = nd-last_end+1
if pre_len > 0
ret.append byteslice(last_end, pre_len)
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 = ma_end
if ma_start == ma_end
if char = find_character(offset)
offset += char.bytesize
else
offset += 1
end
else
offset = ma_end
end
last_match = match
match = pattern.match_from self, offset
break unless match
ma_range = match.full
ma_start = ma_range.at(0)
ma_end = ma_range.at(1)
offset = ma_start
end
Regexp.last_match = last_match
str = byteslice last_end, @num_bytes-last_end+1
ret.append str if str
ret.taint if tainted || self.tainted?
ret.untrust if untrusted
return ret
end
def gsub!(pattern, replacement=undefined)
unless block_given? or replacement != undefined
return to_enum(:gsub, pattern, replacement)
end
Rubinius.check_frozen
tainted = false
untrusted = untrusted?
if replacement.equal?(undefined)
use_yield = true
else
tainted = replacement.tainted?
untrusted ||= replacement.untrusted?
hash = Rubinius::Type.check_convert_type(replacement, Hash, :to_hash)
replacement = StringValue(replacement) unless hash
tainted ||= replacement.tainted?
untrusted ||= replacement.untrusted?
use_yield = false
end
pattern = Rubinius::Type.coerce_to_regexp(pattern, true)
orig_len = @num_bytes
orig_data = @data
last_end = 0
offset = nil
ret = byteslice 0, 0 # Empty string and string subclass
last_match = nil
match = pattern.match_from self, last_end
if match
ma_range = match.full
ma_start = ma_range.at(0)
ma_end = ma_range.at(1)
offset = ma_start
else
Regexp.last_match = nil
return nil
end
while match
nd = ma_start - 1
pre_len = nd-last_end+1
if pre_len > 0
ret.append byteslice(last_end, pre_len)
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 = ma_end
if ma_start == ma_end
if char = find_character(offset)
offset += char.bytesize
else
offset += 1
end
else
offset = ma_end
end
last_match = match
match = pattern.match_from self, offset
break unless match
ma_range = match.full
ma_start = ma_range.at(0)
ma_end = ma_range.at(1)
offset = ma_start
end
Regexp.last_match = last_match
str = byteslice last_end, @num_bytes-last_end+1
ret.append str if str
self.taint if tainted
self.untrust if untrusted
replace(ret)
return self
end
def match(pattern, pos=0)
match_data = Rubinius::Type.coerce_to_regexp(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, replacement, three=undefined)
unless three.equal?(undefined)
if index.kind_of? Regexp
subpattern_set index,
Rubinius::Type.coerce_to(replacement, Integer, :to_int),
three
else
start = Rubinius::Type.coerce_to(index, Integer, :to_int)
fin = Rubinius::Type.coerce_to(replacement, Integer, :to_int)
splice! start, fin, three
end
return three
end
case index
when Fixnum
# Handle this first because it's the most common.
# This is duplicated from the else branch, but don't dry it up.
if index < 0
index += @num_bytes
if index < 0 or index >= @num_bytes
raise IndexError, "index #{index} out of string"
end
else
raise IndexError, "index #{index} out of string" if index > @num_bytes
end
if replacement.kind_of?(Fixnum)
modify!
@data[index] = replacement
else
splice! index, 1, replacement
end
when Regexp
subpattern_set index, 0, replacement
when String
unless start = self.index(index)
raise IndexError, "string not matched"
end
splice! start, index.length, replacement
when Range
start = Rubinius::Type.coerce_to(index.first, Integer, :to_int)
length = Rubinius::Type.coerce_to(index.last, Integer, :to_int)
start += @num_bytes if start < 0
return nil if start < 0 || start > @num_bytes
length = @num_bytes if length > @num_bytes
length += @num_bytes if length < 0
length += 1 unless index.exclude_end?
length = length - start
length = 0 if length < 0
splice! start, length, replacement
else
index = Rubinius::Type.coerce_to(index, Integer, :to_int)
raise IndexError, "index #{index} out of string" if @num_bytes <= index
if index < 0
raise IndexError, "index #{index} out of string" if -index > @num_bytes
index += @num_bytes
end
if replacement.kind_of?(Fixnum)
modify!
@data[index] = replacement
else
splice! index, 1, replacement
end
end
return replacement
end
end