Module: Logfmt

Defined in:
lib/logfmt/parser.rb,
lib/logfmt/version.rb

Constant Summary collapse

GARBAGE = 
0
KEY = 
1
EQUAL = 
2
IVALUE = 
3
QVALUE = 
4
VERSION = 
"0.0.6"

Class Method Summary collapse

Class Method Details

.integer?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/logfmt/parser.rb', line 12

def self.integer?(s)
  return s.match(/\A[-+]?[0-9]+\Z/)
end

.numeric?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/logfmt/parser.rb', line 8

def self.numeric?(s)
  return s.match(/\A[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?\Z/)
end

.parse(line) ⇒ Object 



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# File 'lib/logfmt/parser.rb', line 16

def self.parse(line)
  output = {}
  key, value = "", ""
  escaped = false
  state = GARBAGE
  i = 0
  line.each_char do |c|
    i += 1
    if state == GARBAGE
      if c > ' ' && c != '"' && c != '='
        key = c
        state = KEY
      end
      next
    end
    if state == KEY
      if c > ' ' && c != '"' && c != '='
        state = KEY
        key << c
      elsif c == '='
        output[key.strip()] = true
        state = EQUAL
      else
        output[key.strip()] = true
        state = GARBAGE
      end
      if i >= line.length
        output[key.strip()] = true
      end
      next
    end
    if state == EQUAL
      if c > ' ' && c != '"' && c != '='
        value = c
        state = IVALUE
      elsif c == '"'
        value = ""
        escaped = false
        state = QVALUE
      else
        state = GARBAGE
      end
      if i >= line.length
        if integer?(value)
          value = Integer(value)
        elsif numeric?(value)
          value = Float(value)
        end
        output[key.strip()] = value || true
      end
      next
    end
    if state == IVALUE
      if not (c > ' ' && c != '"' && c != '=')
        if integer?(value)
          value = Integer(value)
        elsif numeric?(value)
          value = Float(value)
        end
        output[key.strip()] = value
        state = GARBAGE
      else
        value << c
      end
      if i >= line.length
        if integer?(value)
          value = Integer(value)
        elsif numeric?(value)
          value = Float(value)
        end
        output[key.strip()] = value
      end
      next
    end
    if state == QVALUE
      if c == '\\'
        escaped = true
        value << "\\"
      elsif c == '"'
        if escaped
          escaped = false
          value << c
          next
        end
        output[key.strip()] = value
        state = GARBAGE
      else
        escaped = false
        value << c
      end
      next
    end
  end
  output
end