Method: Fiddle::CParser#parse_ctype

Defined in:
lib/fiddle/cparser.rb

#parse_ctype(ty, tymap = nil) ⇒ Object

Given a String of C type ty, returns the corresponding Fiddle constant.

ty can also accept an Array of C type Strings, and will be returned in a corresponding Array.

If Hash tymap is provided, ty is expected to be the key, and the value will be the C type to be looked up.

Example:

require 'fiddle/import'

include Fiddle::CParser
  #=> Object

parse_ctype('int')
  #=> Fiddle::TYPE_INT

parse_ctype('double diff')
  #=> Fiddle::TYPE_DOUBLE

parse_ctype('unsigned char byte')
  #=> -Fiddle::TYPE_CHAR

parse_ctype('const char* const argv[]')
  #=> -Fiddle::TYPE_VOIDP



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# File 'lib/fiddle/cparser.rb', line 149

def parse_ctype(ty, tymap=nil)
  tymap ||= {}
  if ty.is_a?(Array)
    return [parse_ctype(ty[0], tymap), ty[1]]
  end
  ty = ty.gsub(/\Aconst\s+/, "")
  case ty
  when 'void'
    return TYPE_VOID
  when /\A(?:(?:signed\s+)?long\s+long(?:\s+int\s+)?|int64_t)(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_LONG_LONG)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_LONG_LONG
  when /\A(?:unsigned\s+long\s+long(?:\s+int\s+)?|uint64_t)(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_LONG_LONG)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_ULONG_LONG
  when /\Aunsigned\s+long(?:\s+int\s+)?(?:\s+\w+)?\z/,
       /\Aunsigned\s+int\s+long(?:\s+\w+)?\z/,
       /\Along(?:\s+int)?\s+unsigned(?:\s+\w+)?\z/,
       /\Aint\s+unsigned\s+long(?:\s+\w+)?\z/,
       /\A(?:int\s+)?long\s+unsigned(?:\s+\w+)?\z/
    return TYPE_ULONG
  when /\A(?:signed\s+)?long(?:\s+int\s+)?(?:\s+\w+)?\z/,
       /\A(?:signed\s+)?int\s+long(?:\s+\w+)?\z/,
       /\Along(?:\s+int)?\s+signed(?:\s+\w+)?\z/
    return TYPE_LONG
  when /\Aunsigned\s+short(?:\s+int\s+)?(?:\s+\w+)?\z/,
       /\Aunsigned\s+int\s+short(?:\s+\w+)?\z/,
       /\Ashort(?:\s+int)?\s+unsigned(?:\s+\w+)?\z/,
       /\Aint\s+unsigned\s+short(?:\s+\w+)?\z/,
       /\A(?:int\s+)?short\s+unsigned(?:\s+\w+)?\z/
    return TYPE_USHORT
  when /\A(?:signed\s+)?short(?:\s+int\s+)?(?:\s+\w+)?\z/,
       /\A(?:signed\s+)?int\s+short(?:\s+\w+)?\z/,
       /\Aint\s+(?:signed\s+)?short(?:\s+\w+)?\z/
    return TYPE_SHORT
  when /\A(?:signed\s+)?int(?:\s+\w+)?\z/
    return TYPE_INT
  when /\A(?:unsigned\s+int|uint)(?:\s+\w+)?\z/
    return TYPE_UINT
  when /\A(?:signed\s+)?char(?:\s+\w+)?\z/
    return TYPE_CHAR
  when /\Aunsigned\s+char(?:\s+\w+)?\z/
    return  TYPE_UCHAR
  when /\Aint8_t(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_INT8_T)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_INT8_T
  when /\Auint8_t(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_INT8_T)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_UINT8_T
  when /\Aint16_t(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_INT16_T)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_INT16_T
  when /\Auint16_t(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_INT16_T)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_UINT16_T
  when /\Aint32_t(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_INT32_T)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_INT32_T
  when /\Auint32_t(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_INT32_T)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_UINT32_T
  when /\Aint64_t(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_INT64_T)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_INT64_T
  when /\Auint64_t(?:\s+\w+)?\z/
    unless Fiddle.const_defined?(:TYPE_INT64_T)
      raise(RuntimeError, "unsupported type: #{ty}")
    end
    return TYPE_UINT64_T
  when /\Afloat(?:\s+\w+)?\z/
    return TYPE_FLOAT
  when /\Adouble(?:\s+\w+)?\z/
    return TYPE_DOUBLE
  when /\Asize_t(?:\s+\w+)?\z/
    return TYPE_SIZE_T
  when /\Assize_t(?:\s+\w+)?\z/
    return TYPE_SSIZE_T
  when /\Aptrdiff_t(?:\s+\w+)?\z/
    return TYPE_PTRDIFF_T
  when /\Aintptr_t(?:\s+\w+)?\z/
    return TYPE_INTPTR_T
  when /\Auintptr_t(?:\s+\w+)?\z/
    return TYPE_UINTPTR_T
  when /\Abool(?:\s+\w+)?\z/
    return TYPE_BOOL
  when /\*/, /\[[\s\d]*\]/
    return TYPE_VOIDP
  when "..."
    return TYPE_VARIADIC
  else
    ty = ty.split(' ', 2)[0]
    if( tymap[ty] )
      return parse_ctype(tymap[ty], tymap)
    else
      raise(DLError, "unknown type: #{ty}")
    end
  end
end