Returns an array of all the CodeLines that exist after the currently scanned block
Private method to cleanup dn from using the path component attribute.
Private method to cleanup attributes, scope, filter, and extensions from using the query component attribute.
Invoked by Kernel#sleep and Mutex#sleep and is expected to provide an implementation of sleeping in a non-blocking way. Implementation might register the current fiber in some list of “which fiber wait until what moment”, call Fiber.yield to pass control, and then in close resume the fibers whose wait period has elapsed.
Returns the discarded bytes when Encoding::InvalidByteSequenceError occurs.
ec = Encoding::Converter.new("EUC-JP", "ISO-8859-1") begin ec.convert("abc\xA1\xFFdef") rescue Encoding::InvalidByteSequenceError p $! #=> #<Encoding::InvalidByteSequenceError: "\xA1" followed by "\xFF" on EUC-JP> puts $!.error_bytes.dump #=> "\xA1" puts $!.readagain_bytes.dump #=> "\xFF" end
Returns a conversion path.
p Encoding::Converter.search_convpath("ISO-8859-1", "EUC-JP")
#=> [[#<Encoding:ISO-8859-1>, #<Encoding:UTF-8>],
# [#<Encoding:UTF-8>, #<Encoding:EUC-JP>]]
p Encoding::Converter.search_convpath("ISO-8859-1", "EUC-JP", universal_newline: true)
or
p Encoding::Converter.search_convpath("ISO-8859-1", "EUC-JP", newline: :universal)
#=> [[#<Encoding:ISO-8859-1>, #<Encoding:UTF-8>],
# [#<Encoding:UTF-8>, #<Encoding:EUC-JP>],
# "universal_newline"]
p Encoding::Converter.search_convpath("ISO-8859-1", "UTF-32BE", universal_newline: true)
or
p Encoding::Converter.search_convpath("ISO-8859-1", "UTF-32BE", newline: :universal)
#=> [[#<Encoding:ISO-8859-1>, #<Encoding:UTF-8>],
# "universal_newline",
# [#<Encoding:UTF-8>, #<Encoding:UTF-32BE>]]
primitive_errinfo returns important information regarding the last error as a 5-element array:
[result, enc1, enc2, error_bytes, readagain_bytes]
result is the last result of primitive_convert.
Other elements are only meaningful when result is :invalid_byte_sequence, :incomplete_input or :undefined_conversion.
enc1 and enc2 indicate a conversion step as a pair of strings. For example, a converter from EUC-JP to ISO-8859-1 converts a string as follows: EUC-JP -> UTF-8 -> ISO-8859-1. So [enc1, enc2] is either [“EUC-JP”, “UTF-8”] or [“UTF-8”, “ISO-8859-1”].
error_bytes and readagain_bytes indicate the byte sequences which caused the error. error_bytes is discarded portion. readagain_bytes is buffered portion which is read again on next conversion.
Example:
# \xff is invalid as EUC-JP. ec = Encoding::Converter.new("EUC-JP", "Shift_JIS") ec.primitive_convert(src="\xff", dst="", nil, 10) p ec.primitive_errinfo #=> [:invalid_byte_sequence, "EUC-JP", "Shift_JIS", "\xFF", ""] # HIRAGANA LETTER A (\xa4\xa2 in EUC-JP) is not representable in ISO-8859-1. # Since this error is occur in UTF-8 to ISO-8859-1 conversion, # error_bytes is HIRAGANA LETTER A in UTF-8 (\xE3\x81\x82). ec = Encoding::Converter.new("EUC-JP", "ISO-8859-1") ec.primitive_convert(src="\xa4\xa2", dst="", nil, 10) p ec.primitive_errinfo #=> [:undefined_conversion, "UTF-8", "ISO-8859-1", "\xE3\x81\x82", ""] # partial character is invalid ec = Encoding::Converter.new("EUC-JP", "ISO-8859-1") ec.primitive_convert(src="\xa4", dst="", nil, 10) p ec.primitive_errinfo #=> [:incomplete_input, "EUC-JP", "UTF-8", "\xA4", ""] # Encoding::Converter::PARTIAL_INPUT prevents invalid errors by # partial characters. ec = Encoding::Converter.new("EUC-JP", "ISO-8859-1") ec.primitive_convert(src="\xa4", dst="", nil, 10, Encoding::Converter::PARTIAL_INPUT) p ec.primitive_errinfo #=> [:source_buffer_empty, nil, nil, nil, nil] # \xd8\x00\x00@ is invalid as UTF-16BE because # no low surrogate after high surrogate (\xd8\x00). # It is detected by 3rd byte (\00) which is part of next character. # So the high surrogate (\xd8\x00) is discarded and # the 3rd byte is read again later. # Since the byte is buffered in ec, it is dropped from src. ec = Encoding::Converter.new("UTF-16BE", "UTF-8") ec.primitive_convert(src="\xd8\x00\x00@", dst="", nil, 10) p ec.primitive_errinfo #=> [:invalid_byte_sequence, "UTF-16BE", "UTF-8", "\xD8\x00", "\x00"] p src #=> "@" # Similar to UTF-16BE, \x00\xd8@\x00 is invalid as UTF-16LE. # The problem is detected by 4th byte. ec = Encoding::Converter.new("UTF-16LE", "UTF-8") ec.primitive_convert(src="\x00\xd8@\x00", dst="", nil, 10) p ec.primitive_errinfo #=> [:invalid_byte_sequence, "UTF-16LE", "UTF-8", "\x00\xD8", "@\x00"] p src #=> ""
Returns an exception object for the last conversion. Returns nil if the last conversion did not produce an error.
“error” means that Encoding::InvalidByteSequenceError and Encoding::UndefinedConversionError for Encoding::Converter#convert and :invalid_byte_sequence, :incomplete_input and :undefined_conversion for Encoding::Converter#primitive_convert.
ec = Encoding::Converter.new("utf-8", "iso-8859-1") p ec.primitive_convert(src="\xf1abcd", dst="") #=> :invalid_byte_sequence p ec.last_error #=> #<Encoding::InvalidByteSequenceError: "\xF1" followed by "a" on UTF-8> p ec.primitive_convert(src, dst, nil, 1) #=> :destination_buffer_full p ec.last_error #=> nil
Reads the file from pathname, then parses it like ::parse, returning the root node of the abstract syntax tree.
SyntaxError is raised if pathname’s contents are not valid Ruby syntax.
RubyVM::AbstractSyntaxTree.parse_file("my-app/app.rb") # => #<RubyVM::AbstractSyntaxTree::Node:SCOPE@1:0-31:3>
See ::parse for explanation of keyword argument meaning and usage.
Synonym for CGI.unescapeHTML(str)
Synonym for CGI.unescapeElement(str)
Parses a C prototype signature
If Hash tymap is provided, the return value and the arguments from the signature are expected to be keys, and the value will be the C type to be looked up.
Example:
require 'fiddle/import' include Fiddle::CParser #=> Object parse_signature('double sum(double, double)') #=> ["sum", Fiddle::TYPE_DOUBLE, [Fiddle::TYPE_DOUBLE, Fiddle::TYPE_DOUBLE]] parse_signature('void update(void (*cb)(int code))') #=> ["update", Fiddle::TYPE_VOID, [Fiddle::TYPE_VOIDP]] parse_signature('char (*getbuffer(void))[80]') #=> ["getbuffer", Fiddle::TYPE_VOIDP, []]
Given a String of C type ty, returns the corresponding Fiddle constant.
ty can also accept an Array of C type Strings, and will be returned in a corresponding Array.
If Hash tymap is provided, ty is expected to be the key, and the value will be the C type to be looked up.
Example:
require 'fiddle/import' include Fiddle::CParser #=> Object parse_ctype('int') #=> Fiddle::TYPE_INT parse_ctype('double diff') #=> Fiddle::TYPE_DOUBLE parse_ctype('unsigned char byte') #=> -Fiddle::TYPE_CHAR parse_ctype('const char* const argv[]') #=> -Fiddle::TYPE_VOIDP
Mixes the bytes from str into the Pseudo Random Number Generator(PRNG) state.
Thus, if the data from str are unpredictable to an adversary, this increases the uncertainty about the state and makes the PRNG output less predictable.
The entropy argument is (the lower bound of) an estimate of how much randomness is contained in str, measured in bytes.
pid = $$ now = Time.now ary = [now.to_i, now.nsec, 1000, pid] OpenSSL::Random.add(ary.join, 0.0) OpenSSL::Random.seed(ary.join)
Generates a String with length number of cryptographically strong pseudo-random bytes.
OpenSSL::Random.random_bytes(12) #=> "..."