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#! /your/favourite/path/to/ruby
# -*- mode: ruby; coding: utf-8; indent-tabs-mode: nil; ruby-indent-level: 2 -*-
# -*- frozen_string_literal: true; -*-
# -*- warn_indent: true; -*-
#
# Copyright (c) 2017 Urabe, Shyouhei. All rights reserved.
#
# This file is a part of the programming language Ruby. Permission is hereby
# granted, to either redistribute and/or modify this file, provided that the
# conditions mentioned in the file COPYING are met. Consult the file for
# details.
require 'securerandom'
module RubyVM::CEscape
module_function
# generate comment, with escaps.
def commentify str
return "/* #{str.strip.b.gsub '*/', '*\\/'} */"
end
# Mimic gensym of CL.
def gensym prefix = 'gensym_'
return as_tr_cpp "#{prefix}#{SecureRandom.uuid}"
end
# Mimic AS_TR_CPP() of autoconf.
def as_tr_cpp name
q = name.b
q.gsub! %r/[^a-zA-Z0-9_]/m, '_'
q.gsub! %r/_+/, '_'
return q
end
# Section 6.10.4 of ISO/IEC 9899:1999 specifies that the file name used for
# #line directive shall be a "character string literal". So this is needed.
#
# I'm not sure how many chars are allowed here, though. The standard
# specifies 4095 chars at most, after string concatenation (section 5.2.4.1).
# But it is easy to have a path that is longer than that.
#
# Here we ignore the standard. Just create single string literal of any
# needed length.
def rstring2cstr str
# I believe this is the fastest implementation done in pure-ruby.
# Constants cached, gsub skips block evaluation, string literal optimized.
buf = str.b
buf.gsub! %r/./n, RString2CStr
return %'"#{buf}"'
end
RString2CStr = {
"\x00"=> "\\0", "\x01"=> "\\x1", "\x02"=> "\\x2", "\x03"=> "\\x3",
"\x04"=> "\\x4", "\x05"=> "\\x5", "\x06"=> "\\x6", "\a"=> "\\a",
"\b"=> "\\b", "\t"=> "\\t", "\n"=> "\\n", "\v"=> "\\v",
"\f"=> "\\f", "\r"=> "\\r", "\x0E"=> "\\xe", "\x0F"=> "\\xf",
"\x10"=>"\\x10", "\x11"=>"\\x11", "\x12"=>"\\x12", "\x13"=>"\\x13",
"\x14"=>"\\x14", "\x15"=>"\\x15", "\x16"=>"\\x16", "\x17"=>"\\x17",
"\x18"=>"\\x18", "\x19"=>"\\x19", "\x1A"=>"\\x1a", "\e"=>"\\x1b",
"\x1C"=>"\\x1c", "\x1D"=>"\\x1d", "\x1E"=>"\\x1e", "\x1F"=>"\\x1f",
" "=> " ", "!"=> "!", "\""=> "\\\"", "#"=> "#",
"$"=> "$", "%"=> "%", "&"=> "&", "'"=> "\\'",
"("=> "(", ")"=> ")", "*"=> "*", "+"=> "+",
","=> ",", "-"=> "-", "."=> ".", "/"=> "/",
"0"=> "0", "1"=> "1", "2"=> "2", "3"=> "3",
"4"=> "4", "5"=> "5", "6"=> "6", "7"=> "7",
"8"=> "8", "9"=> "9", ":"=> ":", ";"=> ";",
"<"=> "<", "="=> "=", ">"=> ">", "?"=> "?",
"@"=> "@", "A"=> "A", "B"=> "B", "C"=> "C",
"D"=> "D", "E"=> "E", "F"=> "F", "G"=> "G",
"H"=> "H", "I"=> "I", "J"=> "J", "K"=> "K",
"L"=> "L", "M"=> "M", "N"=> "N", "O"=> "O",
"P"=> "P", "Q"=> "Q", "R"=> "R", "S"=> "S",
"T"=> "T", "U"=> "U", "V"=> "V", "W"=> "W",
"X"=> "X", "Y"=> "Y", "Z"=> "Z", "["=> "[",
"\\"=> "\\\\", "]"=> "]", "^"=> "^", "_"=> "_",
"`"=> "`", "a"=> "a", "b"=> "b", "c"=> "c",
"d"=> "d", "e"=> "e", "f"=> "f", "g"=> "g",
"h"=> "h", "i"=> "i", "j"=> "j", "k"=> "k",
"l"=> "l", "m"=> "m", "n"=> "n", "o"=> "o",
"p"=> "p", "q"=> "q", "r"=> "r", "s"=> "s",
"t"=> "t", "u"=> "u", "v"=> "v", "w"=> "w",
"x"=> "x", "y"=> "y", "z"=> "z", "{"=> "{",
"|"=> "|", "}"=> "}", "~"=> "~", "\x7F"=>"\\x7f",
"\x80"=>"\\x80", "\x81"=>"\\x81", "\x82"=>"\\x82", "\x83"=>"\\x83",
"\x84"=>"\\x84", "\x85"=>"\\x85", "\x86"=>"\\x86", "\x87"=>"\\x87",
"\x88"=>"\\x88", "\x89"=>"\\x89", "\x8A"=>"\\x8a", "\x8B"=>"\\x8b",
"\x8C"=>"\\x8c", "\x8D"=>"\\x8d", "\x8E"=>"\\x8e", "\x8F"=>"\\x8f",
"\x90"=>"\\x90", "\x91"=>"\\x91", "\x92"=>"\\x92", "\x93"=>"\\x93",
"\x94"=>"\\x94", "\x95"=>"\\x95", "\x96"=>"\\x96", "\x97"=>"\\x97",
"\x98"=>"\\x98", "\x99"=>"\\x99", "\x9A"=>"\\x9a", "\x9B"=>"\\x9b",
"\x9C"=>"\\x9c", "\x9D"=>"\\x9d", "\x9E"=>"\\x9e", "\x9F"=>"\\x9f",
"\xA0"=>"\\xa0", "\xA1"=>"\\xa1", "\xA2"=>"\\xa2", "\xA3"=>"\\xa3",
"\xA4"=>"\\xa4", "\xA5"=>"\\xa5", "\xA6"=>"\\xa6", "\xA7"=>"\\xa7",
"\xA8"=>"\\xa8", "\xA9"=>"\\xa9", "\xAA"=>"\\xaa", "\xAB"=>"\\xab",
"\xAC"=>"\\xac", "\xAD"=>"\\xad", "\xAE"=>"\\xae", "\xAF"=>"\\xaf",
"\xB0"=>"\\xb0", "\xB1"=>"\\xb1", "\xB2"=>"\\xb2", "\xB3"=>"\\xb3",
"\xB4"=>"\\xb4", "\xB5"=>"\\xb5", "\xB6"=>"\\xb6", "\xB7"=>"\\xb7",
"\xB8"=>"\\xb8", "\xB9"=>"\\xb9", "\xBA"=>"\\xba", "\xBB"=>"\\xbb",
"\xBC"=>"\\xbc", "\xBD"=>"\\xbd", "\xBE"=>"\\xbe", "\xBF"=>"\\xbf",
"\xC0"=>"\\xc0", "\xC1"=>"\\xc1", "\xC2"=>"\\xc2", "\xC3"=>"\\xc3",
"\xC4"=>"\\xc4", "\xC5"=>"\\xc5", "\xC6"=>"\\xc6", "\xC7"=>"\\xc7",
"\xC8"=>"\\xc8", "\xC9"=>"\\xc9", "\xCA"=>"\\xca", "\xCB"=>"\\xcb",
"\xCC"=>"\\xcc", "\xCD"=>"\\xcd", "\xCE"=>"\\xce", "\xCF"=>"\\xcf",
"\xD0"=>"\\xd0", "\xD1"=>"\\xd1", "\xD2"=>"\\xd2", "\xD3"=>"\\xd3",
"\xD4"=>"\\xd4", "\xD5"=>"\\xd5", "\xD6"=>"\\xd6", "\xD7"=>"\\xd7",
"\xD8"=>"\\xd8", "\xD9"=>"\\xd9", "\xDA"=>"\\xda", "\xDB"=>"\\xdb",
"\xDC"=>"\\xdc", "\xDD"=>"\\xdd", "\xDE"=>"\\xde", "\xDF"=>"\\xdf",
"\xE0"=>"\\xe0", "\xE1"=>"\\xe1", "\xE2"=>"\\xe2", "\xE3"=>"\\xe3",
"\xE4"=>"\\xe4", "\xE5"=>"\\xe5", "\xE6"=>"\\xe6", "\xE7"=>"\\xe7",
"\xE8"=>"\\xe8", "\xE9"=>"\\xe9", "\xEA"=>"\\xea", "\xEB"=>"\\xeb",
"\xEC"=>"\\xec", "\xED"=>"\\xed", "\xEE"=>"\\xee", "\xEF"=>"\\xef",
"\xF0"=>"\\xf0", "\xF1"=>"\\xf1", "\xF2"=>"\\xf2", "\xF3"=>"\\xf3",
"\xF4"=>"\\xf4", "\xF5"=>"\\xf5", "\xF6"=>"\\xf6", "\xF7"=>"\\xf7",
"\xF8"=>"\\xf8", "\xF9"=>"\\xf9", "\xFA"=>"\\xfa", "\xFB"=>"\\xfb",
"\xFC"=>"\\xfc", "\xFD"=>"\\xfd", "\xFE"=>"\\xfe", "\xFF"=>"\\xff",
}.freeze
private_constant :RString2CStr
end
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