Class: LineInput
Overview
$Id: lineinput.rb 2226 2006-04-15 03:05:09Z aamine $
Copyright © 2002-2005 Minero Aoki
This program is free software. You can distribute/modify this program under the terms of the GNU LGPL, Lesser General Public License version 2.1.
Instance Method Summary collapse
- #each ⇒ Object
- #eof? ⇒ Boolean
- #getblock(term_re) ⇒ Object
- #getlines_until(re) ⇒ Object (also: #break)
- #getlines_while(re) ⇒ Object (also: #span)
- #gets ⇒ Object
- #gets_if(re) ⇒ Object
- #gets_unless(re) ⇒ Object
-
#initialize(f) ⇒ LineInput
constructor
A new instance of LineInput.
- #inspect ⇒ Object
- #lineno ⇒ Object
- #next? ⇒ Boolean
- #peek ⇒ Object
- #skip_blank_lines ⇒ Object
- #ungets(line) ⇒ Object
- #until_match(re) ⇒ Object
- #until_terminator(re) ⇒ Object
- #while_match(re) ⇒ Object
Constructor Details
#initialize(f) ⇒ LineInput
Returns a new instance of LineInput.
13 14 15 16 17 18 |
# File 'lib/lineinput.rb', line 13 def initialize(f) @input = f @buf = [] @lineno = 0 @eof_p = false end |
Instance Method Details
#each ⇒ Object
91 92 93 94 95 |
# File 'lib/lineinput.rb', line 91 def each while line = gets() yield line end end |
#eof? ⇒ Boolean
24 25 26 |
# File 'lib/lineinput.rb', line 24 def eof? @eof_p end |
#getblock(term_re) ⇒ Object
147 148 149 150 151 152 153 |
# File 'lib/lineinput.rb', line 147 def getblock(term_re) buf = [] until_terminator(term_re) do |line| buf.push line end buf end |
#getlines_until(re) ⇒ Object Also known as: break
129 130 131 132 133 134 135 |
# File 'lib/lineinput.rb', line 129 def getlines_until(re) buf = [] until_match(re) do |line| buf.push line end buf end |
#getlines_while(re) ⇒ Object Also known as: span
108 109 110 111 112 113 114 |
# File 'lib/lineinput.rb', line 108 def getlines_while(re) buf = [] while_match(re) do |line| buf.push line end buf end |
#gets ⇒ Object
32 33 34 35 36 37 38 39 40 41 42 |
# File 'lib/lineinput.rb', line 32 def gets unless @buf.empty? @lineno += 1 return @buf.pop end return nil if @eof_p # to avoid ARGF blocking. line = @input.gets @eof_p = true unless line @lineno += 1 line end |
#gets_if(re) ⇒ Object
73 74 75 76 77 78 79 80 |
# File 'lib/lineinput.rb', line 73 def gets_if(re) line = gets() if not line or not (re =~ line) ungets line return nil end line end |
#gets_unless(re) ⇒ Object
82 83 84 85 86 87 88 89 |
# File 'lib/lineinput.rb', line 82 def gets_unless(re) line = gets() if not line or re =~ line ungets line return nil end line end |
#inspect ⇒ Object
20 21 22 |
# File 'lib/lineinput.rb', line 20 def inspect "\#<#{self.class} file=#{@input.inspect} line=#{lineno()}>" end |
#lineno ⇒ Object
28 29 30 |
# File 'lib/lineinput.rb', line 28 def lineno @lineno end |
#next? ⇒ Boolean
57 58 59 |
# File 'lib/lineinput.rb', line 57 def next? peek() ? true : false end |
#peek ⇒ Object
51 52 53 54 55 |
# File 'lib/lineinput.rb', line 51 def peek line = gets() ungets line if line line end |
#skip_blank_lines ⇒ Object
61 62 63 64 65 66 67 68 69 70 71 |
# File 'lib/lineinput.rb', line 61 def skip_blank_lines n = 0 while line = gets() unless line.strip.empty? ungets line return n end n += 1 end n end |
#ungets(line) ⇒ Object
44 45 46 47 48 49 |
# File 'lib/lineinput.rb', line 44 def ungets(line) return unless line @lineno -= 1 @buf.push line line end |
#until_match(re) ⇒ Object
118 119 120 121 122 123 124 125 126 127 |
# File 'lib/lineinput.rb', line 118 def until_match(re) while line = gets() if re =~ line ungets line return end yield line end nil end |
#until_terminator(re) ⇒ Object
139 140 141 142 143 144 145 |
# File 'lib/lineinput.rb', line 139 def until_terminator(re) while line = gets() return if re =~ line # discard terminal line yield line end nil end |
#while_match(re) ⇒ Object
97 98 99 100 101 102 103 104 105 106 |
# File 'lib/lineinput.rb', line 97 def while_match(re) while line = gets() unless re =~ line ungets line return end yield line end nil end |