Class: CSV::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/csv/parser.rb

Defined Under Namespace

Classes: InputsScanner, InvalidEncoding, Scanner, UnoptimizedStringIO

Instance Method Summary collapse

Constructor Details

#initialize(input, options) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/csv/parser.rb', line 169

def initialize(input, options)
  @input = input
  @options = options
  @samples = []

  prepare
end

Instance Method Details

#column_separator ⇒ Object 



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# File 'lib/csv/parser.rb', line 177

def column_separator
  @column_separator
end

#field_size_limit ⇒ Object 



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# File 'lib/csv/parser.rb', line 189

def field_size_limit
  @field_size_limit
end

#header_row? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/csv/parser.rb', line 205

def header_row?
  @use_headers and @headers.nil?
end

#headers ⇒ Object 



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# File 'lib/csv/parser.rb', line 201

def headers
  @headers
end

#liberal_parsing? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/csv/parser.rb', line 217

def liberal_parsing?
  @liberal_parsing
end

#line ⇒ Object 



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# File 'lib/csv/parser.rb', line 225

def line
  last_line
end

#lineno ⇒ Object 



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# File 'lib/csv/parser.rb', line 221

def lineno
  @lineno
end

#parse(&block) ⇒ Object 



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# File 'lib/csv/parser.rb', line 229

def parse(&block)
  return to_enum(__method__) unless block_given?

  if @return_headers and @headers
    headers = Row.new(@headers, @raw_headers, true)
    if @unconverted_fields
      headers = add_unconverted_fields(headers, [])
    end
    yield headers
  end

  row = []
  begin
    @scanner = build_scanner
    skip_needless_lines
    start_row
    while true
      @quoted_column_value = false
      @unquoted_column_value = false
      value = parse_column_value
      if value and @field_size_limit and value.size >= @field_size_limit
        raise MalformedCSVError.new("Field size exceeded", @lineno + 1)
      end
      if parse_column_end
        row << value
      elsif parse_row_end
        if row.empty? and value.nil?
          emit_row([], &block) unless @skip_blanks
        else
          row << value
          emit_row(row, &block)
          row = []
        end
        skip_needless_lines
        start_row
      elsif @scanner.eos?
        return if row.empty? and value.nil?
        row << value
        emit_row(row, &block)
        return
      else
        if @quoted_column_value
          message = "Do not allow except col_sep_split_separator " +
            "after quoted fields"
          raise MalformedCSVError.new(message, @lineno + 1)
        elsif @unquoted_column_value and @scanner.scan(@cr_or_lf)
          message = "Unquoted fields do not allow \\r or \\n"
          raise MalformedCSVError.new(message, @lineno + 1)
        elsif @scanner.rest.start_with?(@quote_character)
          message = "Illegal quoting"
          raise MalformedCSVError.new(message, @lineno + 1)
        else
          raise MalformedCSVError.new("TODO: Meaningful message",
                                      @lineno + 1)
        end
      end
    end
  rescue InvalidEncoding
    message = "Invalid byte sequence in #{@encoding}"
    raise MalformedCSVError.new(message, @lineno + 1)
  end
end

#quote_character ⇒ Object 



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# File 'lib/csv/parser.rb', line 185

def quote_character
  @quote_character
end

#return_headers? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/csv/parser.rb', line 209

def return_headers?
  @return_headers
end

#row_separator ⇒ Object 



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# File 'lib/csv/parser.rb', line 181

def row_separator
  @row_separator
end

#skip_blanks? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/csv/parser.rb', line 213

def skip_blanks?
  @skip_blanks
end

#skip_lines ⇒ Object 



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# File 'lib/csv/parser.rb', line 193

def skip_lines
  @skip_lines
end

#unconverted_fields? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/csv/parser.rb', line 197

def unconverted_fields?
  @unconverted_fields
end