Object
# File scanf.rb, line 331 def initialize(str) @spec_string = str h = '[A-Fa-f0-9]' @re_string, @handler = case @spec_string # %[[:...:]] when /%\*?(\[\[:[a-z]+:\]\])/ [ "(#{$1}+)", :extract_plain ] # %5[[:...:]] when /%\*?(\d+)(\[\[:[a-z]+:\]\])/ [ "(#{$2}{1,#{$1}})", :extract_plain ] # %[...] when /%\*?\[([^\]]*)\]/ yes = $1 if /^\^/.match(yes) then no = yes[1..-1] else no = '^' + yes end [ "([#{yes}]+)(?=[#{no}]|\\z)", :extract_plain ] # %5[...] when /%\*?(\d+)\[([^\]]*)\]/ yes = $2 w = $1 [ "([#{yes}]{1,#{w}})", :extract_plain ] # %i when /%\*?i/ [ "([-+]?(?:(?:0[0-7]+)|(?:0[Xx]#{h}+)|(?:[1-9]\\d*)))", :extract_integer ] # %5i when /%\*?(\d+)i/ n = $1.to_i s = "(" if n > 1 then s += "[1-9]\\d{1,#{n-1}}|" end if n > 1 then s += "0[0-7]{1,#{n-1}}|" end if n > 2 then s += "[-+]0[0-7]{1,#{n-2}}|" end if n > 2 then s += "[-+][1-9]\\d{1,#{n-2}}|" end if n > 2 then s += "0[Xx]#{h}{1,#{n-2}}|" end if n > 3 then s += "[-+]0[Xx]#{h}{1,#{n-3}}|" end s += "\\d" s += ")" [ s, :extract_integer ] # %d, %u when /%\*?[du]/ [ '([-+]?\d+)', :extract_decimal ] # %5d, %5u when /%\*?(\d+)[du]/ n = $1.to_i s = "(" if n > 1 then s += "[-+]\\d{1,#{n-1}}|" end s += "\\d{1,#{$1}})" [ s, :extract_decimal ] # %x when /%\*?[Xx]/ [ "([-+]?(?:0[Xx])?#{h}+)", :extract_hex ] # %5x when /%\*?(\d+)[Xx]/ n = $1.to_i s = "(" if n > 3 then s += "[-+]0[Xx]#{h}{1,#{n-3}}|" end if n > 2 then s += "0[Xx]#{h}{1,#{n-2}}|" end if n > 1 then s += "[-+]#{h}{1,#{n-1}}|" end s += "#{h}{1,#{n}}" s += ")" [ s, :extract_hex ] # %o when /%\*?o/ [ '([-+]?[0-7]+)', :extract_octal ] # %5o when /%\*?(\d+)o/ [ "([-+][0-7]{1,#{$1.to_i-1}}|[0-7]{1,#{$1}})", :extract_octal ] # %f when /%\*?f/ [ '([-+]?((\d+(?>(?=[^\d.]|$)))|(\d*(\.(\d*([eE][-+]?\d+)?)))))', :extract_float ] # %5f when /%\*?(\d+)f/ [ "(\\S{1,#{$1}})", :extract_float ] # %5s when /%\*?(\d+)s/ [ "(\\S{1,#{$1}})", :extract_plain ] # %s when /%\*?s/ [ '(\S+)', :extract_plain ] # %c when /\s%\*?c/ [ "\\s*(.)", :extract_plain ] # %c when /%\*?c/ [ "(.)", :extract_plain ] # %5c (whitespace issues are handled by the count_*_space? methods) when /%\*?(\d+)c/ [ "(.{1,#{$1}})", :extract_plain ] # %% when /%%/ [ '(\s*%)', :nil_proc ] # literal characters else [ "(#{Regexp.escape(@spec_string)})", :nil_proc ] end @re_string = '\A' + @re_string end
# File scanf.rb, line 327 def count_space? /(?:\A|\S)%\*?\d*c|%\d*\[/.match(@spec_string) end
# File scanf.rb, line 468 def letter @spec_string[/%\*?\d*([a-z\[])/, 1] end
# File scanf.rb, line 455 def match(str) @matched = false s = str.dup s.sub!(/\A\s+/,'') unless count_space? res = to_re.match(s) if res @conversion = send(@handler, res[1]) @matched_string = @conversion.to_s @matched = true end res end
# File scanf.rb, line 477 def mid_match? return false unless @matched cc_no_width = letter == '[' &&! width c_or_cc_width = (letter == 'c' || letter == '[') && width width_left = c_or_cc_width && (matched_string.size < width) return width_left || cc_no_width end