Class: String

Inherits:

Object

• Object
• String

Defined in:

lib/string_undump.rb

Instance Method Summary

• #undump_badly ⇒ Object
• #undump_roughly ⇒ Object (also: #undump)

Instance Method Details

#undump_badly ⇒ Object

# File 'lib/string_undump.rb', line 4

def undump_badly
  hex = /[0-9a-fA-F]/
  esctable = {
    '\n' => "\n",
    '\r' => "\r",
    '\t' => "\t",
    '\f' => "\f",
    '\v' => "\v",
    '\b' => "\b",
    '\a' => "\a",
    '\e' => "\e",
  }
  e = self.encoding
  s = if self[0] == '"' && self[-1] == '"'
      self[1..-2]
    else
      self.dup
    end
  s.gsub!(/\\\#\$/, '#$')
  s.gsub!(/\\\#@/, '#@')
  s.gsub!(/\\\#{/, '#{')
  s.gsub!(/\\"/, '"')
  s.gsub!(/\\\\/, '\\')
  s.gsub!(/\\[nrtfvbae]/) {|m| esctable[m]}
  s.gsub!(/\\u#{hex}{4}/) {|m| m[2..-1].hex.chr(e)}
  s.gsub!(/\\u{#{hex}+}/) {|m| m[3..-1].hex.chr(e)}
  s.gsub!(/(?:\\x#{hex}{2})+/) {|m|
    m.gsub(/\\x/, '').scan(/../).map(&:hex).pack("C*").force_encoding(e)
  }
  s
end

#undump_roughly ⇒ Object Also known as: undump

# File 'ext/string_undump/string_undump.c', line 166

static VALUE
str_undump_roughly(VALUE str)
{
    const char *s = StringValuePtr(str);
    const char *s_end = RSTRING_END(str);
    rb_encoding *enc = rb_enc_get(str);
    int n;
    unsigned int c;
    VALUE undumped = rb_enc_str_new(s, 0L, enc);

    rb_must_asciicompat(str);

    if (is_wrapped(s, s_end, enc)) {
  /* strip '"' at the begin and the end */
  s++;
  s_end--;
    }

    for (; s < s_end; s += n) {
  c = rb_enc_codepoint_len(s, s_end, &n, enc);
  if (c == '\\') {
      if (s+1 >= s_end) {
    rb_raise(rb_eArgError, "invalid escape");
      }
      n = undump_after_backslash(undumped, s+1, s_end, enc);
  }
  else {
      rb_str_cat(undumped, s, n);
  }
    }

    OBJ_INFECT(undumped, str);
    return undumped;
}