1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118
use std::rc::Rc; use std::vec::Vec; use super::*; use super::ElementContent::*; extern crate byteorder; mod test; pub fn generate(x: &Element) -> Vec<u8> { let mut r = vec!(); let id = match x.content { Unknown(id_, _) => id_, _ => super::database::class_to_id(x.class), }; let mut data : Vec<u8> = match x.content { Binary(ref x) => (**x).clone(), Unsigned(x) => generate_big_endian_number(x), Signed(x) => generate_big_endian_number_s(x), Float(x) => { use self::byteorder::WriteBytesExt; use self::byteorder::BigEndian; let mut vv = vec![]; vv.write_f32::<BigEndian>(x as f32); vv } Text(ref x) => (**x).clone().into_bytes(), Master(ref x) => { let mut vv = vec![]; for i in x { vv.append( &mut generate(&*i) ); } vv } MatroskaDate(x) => generate_big_endian_number_s(x), Unknown(_, ref x) => (**x).clone(), }; r.append( &mut generate_ebml_number(id, Mode::Identifier) ); r.append( &mut generate_ebml_number(data.len() as u64, Mode::Unsigned) ); r.append( &mut data ); r } enum Mode { Unsigned, Identifier, } fn generate_ebml_number(x : u64, inputmode : Mode) -> Vec<u8> { match inputmode { Mode::Identifier => generate_big_endian_number(x), Mode::Unsigned => { let mut r = vec!(); if x == 0xFFFFFFFFFFFFFFFF { return vec!(0xFF); } let (numbytes, bit) = match x { v if v < 0x100 - 0x81 => (1, 0x80), v if v < 0x10000 - 0xC001 => (2, 0x40), v if v < 0x1000000 - 0xE00001 => (3, 0x20), v if v < 0x100000000 - 0xF0000001 => (4, 0x10), v if v < 0x10000000000 - 0xF800000001 => (5, 0x08), v if v < 0x1000000000000 - 0xFC0000000001 => (6, 0x04), v if v < 0x100000000000000 - 0xFE000000000001 => (7, 0x02), _ => (8, 0x01), }; r.push( bit | ((x >> (numbytes-1)) as u8) ); for i in 1..numbytes { r.push ( ((x >> ((numbytes-i-1)*8)) & 0xFF) as u8 ); } r }, } } fn generate_big_endian_number( x : u64) -> Vec<u8> { let mut r = vec!(); let numbytes = match x { v if v < 0x100 => 1, v if v < 0x10000 => 2, v if v < 0x1000000 => 3, v if v < 0x100000000 => 4, v if v < 0x10000000000 => 5, v if v < 0x1000000000000 => 6, v if v < 0x100000000000000 => 7, _ => 8, }; for i in 0..numbytes { r.push ( ((x >> ((numbytes-i-1)*8)) & 0xFF) as u8 ); } r } fn generate_big_endian_number_s( x : i64) -> Vec<u8> { let mut r = vec!(); let numbytes = match x { v if -0x80 <= v && v < 0x80 => 1, v if -0x8000 <= v && v < 0x8000 => 2, v if -0x800000 <= v && v < 0x800000 => 3, v if -0x80000000 <= v && v < 0x80000000 => 4, v if -0x8000000000 <= v && v < 0x8000000000 => 5, v if -0x800000000000 <= v && v < 0x800000000000 => 6, v if -0x80000000000000 <= v && v < 0x80000000000000 => 7, _ => 8, }; for i in 0..numbytes { r.push ( ((x >> ((numbytes-i-1)*8)) & 0xFF) as u8 ); } r }