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module Tomlrb
class StringUtils
SPECIAL_CHARS = {
'\\t' => "\t",
'\\b' => "\b",
'\\f' => "\f",
'\\n' => "\n",
'\\r' => "\r",
'\\"' => '"',
'\\\\' => '\\'
}.freeze
def self.multiline_replacements(str)
strip_spaces(str).gsub(/\\+\s*\n\s*/) {|matched|
if matched.match(/\\+/)[0].length.odd?
matched.gsub(/\\\s*\n\s*/, '')
else
matched
end
}
end
def self.replace_escaped_chars(str)
str.gsub(/\\(u[\da-fA-F]{4}|U[\da-fA-F]{8}|.)/) do |m|
if m.size == 2
SPECIAL_CHARS[m] || (raise Tomlrb::ParseError.new "Escape sequence #{m} is reserved")
else
m[2..-1].to_i(16).chr(Encoding::UTF_8)
end
end
end
def self.strip_spaces(str)
str[0] = '' if str[0] == "\n"
str
end
end
end
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