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bit_length-i.ri
U:RDoc::AnyMethod[iI"bit_length:ETI"Integer#bit_length;TF: publico:RDoc::Markup::Document: @parts[o: RDoc::Markup::Paragraph; [I"6Returns the number of bits of the value of +int+.;To: RDoc::Markup::BlankLine o; ; [ I"@"Number of bits" means the bit position of the highest bit ;TI"*which is different from the sign bit ;TI";(where the least significant bit has bit position 1). ;TI"CIf there is no such bit (zero or minus one), zero is returned.;T@o; ; [I"HI.e. this method returns <i>ceil(log2(int < 0 ? -int : int+1))</i>.;T@o:RDoc::Markup::Verbatim; [I"((-2**1000-1).bit_length #=> 1001 ;TI"((-2**1000).bit_length #=> 1000 ;TI"((-2**1000+1).bit_length #=> 1000 ;TI"&(-2**12-1).bit_length #=> 13 ;TI"&(-2**12).bit_length #=> 12 ;TI"&(-2**12+1).bit_length #=> 12 ;TI"%-0x101.bit_length #=> 9 ;TI"%-0x100.bit_length #=> 8 ;TI"%-0xff.bit_length #=> 8 ;TI"%-2.bit_length #=> 1 ;TI"%-1.bit_length #=> 0 ;TI"%0.bit_length #=> 0 ;TI"%1.bit_length #=> 1 ;TI"%0xff.bit_length #=> 8 ;TI"%0x100.bit_length #=> 9 ;TI"&(2**12-1).bit_length #=> 12 ;TI"&(2**12).bit_length #=> 13 ;TI"&(2**12+1).bit_length #=> 13 ;TI"((2**1000-1).bit_length #=> 1000 ;TI"((2**1000).bit_length #=> 1001 ;TI"((2**1000+1).bit_length #=> 1001 ;T: @format0o; ; [I"IThis method can be used to detect overflow in Array#pack as follows:;T@o; ; [ I"if n.bit_length < 32 ;TI"# [n].pack("l") # no overflow ;TI" else ;TI" raise "overflow" ;TI"end;T; 0: @fileI"numeric.c;T:0@omit_headings_from_table_of_contents_below0I"!int.bit_length -> integer ;T0[ I"();T@9FI" Integer;TcRDoc::NormalClass00