Files
addr2line
adler
adler32
ahash
aho_corasick
angle
approx
backtrace
bitflags
blender
bytemuck
byteorder
case
cast_trait
cfg_if
chrono
color
color_quant
const_fn
crc32fast
crossbeam
crossbeam_channel
crossbeam_deque
crossbeam_epoch
crossbeam_queue
crossbeam_skiplist
crossbeam_utils
darling
darling_core
darling_macro
dds
deflate
densevec
derive_builder
derive_builder_core
dot
downcast_rs
dual_quat
either
erased_serde
failure
failure_derive
fixedbitset
float_cmp
fnv
freeimage
freeimage_sys
freetype
freetype_gl_sys
freetype_sys
freetypegl
futures
futures_channel
futures_core
futures_executor
futures_io
futures_macro
futures_sink
futures_task
futures_util
async_await
future
io
lock
sink
stream
task
fxhash
generational_arena
generic_array
getrandom
gif
gimli
glfw
glfw_sys
glin
glin_derive
glsl
half
harfbuzz
harfbuzz_ft_sys
harfbuzz_sys
hashbrown
human_sort
ident_case
image
indexmap
instant
itertools
itoa
jpeg_decoder
lazy_static
libc
libm
lock_api
log
lut_parser
matrixmultiply
memchr
memoffset
meshopt
miniz_oxide
monotonic_clock
mopa
mutiny_derive
na
nalgebra
base
geometry
linalg
ncollide3d
bounding_volume
interpolation
partitioning
pipeline
procedural
query
algorithms
closest_points
contact
distance
nonlinear_time_of_impact
point
proximity
ray
time_of_impact
visitors
shape
transformation
utils
nom
num_complex
num_cpus
num_integer
num_iter
num_rational
num_traits
numext_constructor
numext_fixed_uint
numext_fixed_uint_core
numext_fixed_uint_hack
object
once_cell
parking_lot
parking_lot_core
pathfinding
pennereq
petgraph
pin_project_lite
pin_utils
png
polygon2
ppv_lite86
proc_macro2
proc_macro_crate
proc_macro_hack
proc_macro_nested
quote
rand
rand_chacha
rand_core
rand_distr
raw_window_handle
rawpointer
rayon
rayon_core
rect_packer
regex
regex_syntax
retain_mut
rin
rin_app
rin_blender
rin_core
rin_gl
rin_graphics
rin_gui
rin_material
rin_math
rin_postpo
rin_scene
rin_util
rin_window
rinblender
rinecs
rinecs_derive
rinecs_derive_utils
ringui_derive
rustc_demangle
rusty_pool
ryu
scopeguard
seitan
seitan_derive
semver
semver_parser
serde
serde_derive
serde_json
shaderdata_derive
simba
slab
slice_of_array
slotmap
smallvec
std140_data
streaming_iterator
strsim
syn
synstructure
thiserror
thiserror_impl
thread_local
tiff
time
toml
typenum
unchecked_unwrap
unicode_xid
vec2
vec3
weezl
x11
zlib_sys
  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
119
120
#[cfg(test)]
use crate::huffman_table::MAX_MATCH;
use crate::huffman_table::{MAX_DISTANCE, MIN_MATCH};

#[derive(Copy, Clone, Eq, PartialEq, Debug)]
pub struct StoredLength {
    length: u8,
}

impl StoredLength {
    #[cfg(test)]
    pub fn from_actual_length(length: u16) -> StoredLength {
        assert!(length <= MAX_MATCH && length >= MIN_MATCH);
        StoredLength {
            length: (length - MIN_MATCH) as u8,
        }
    }

    pub fn new(stored_length: u8) -> StoredLength {
        StoredLength {
            length: stored_length,
        }
    }

    pub fn stored_length(&self) -> u8 {
        self.length
    }

    #[cfg(test)]
    pub fn actual_length(&self) -> u16 {
        u16::from(self.length) + MIN_MATCH
    }
}

#[derive(Copy, Clone, Eq, PartialEq, Debug)]
pub enum LZType {
    Literal(u8),
    StoredLengthDistance(StoredLength, u16),
}

#[derive(Copy, Clone, Eq, PartialEq, Debug)]
pub struct LZValue {
    litlen: u8,
    distance: u16,
}

impl LZValue {
    #[inline]
    pub fn literal(value: u8) -> LZValue {
        LZValue {
            litlen: value,
            distance: 0,
        }
    }

    #[inline]
    pub fn length_distance(length: u16, distance: u16) -> LZValue {
        debug_assert!(distance > 0 && distance <= MAX_DISTANCE);
        let stored_length = (length - MIN_MATCH) as u8;
        LZValue {
            litlen: stored_length,
            distance,
        }
    }

    #[inline]
    pub fn value(&self) -> LZType {
        if self.distance != 0 {
            LZType::StoredLengthDistance(StoredLength::new(self.litlen), self.distance)
        } else {
            LZType::Literal(self.litlen)
        }
    }
}

#[cfg(test)]
pub fn lit(l: u8) -> LZValue {
    LZValue::literal(l)
}

#[cfg(test)]
pub fn ld(l: u16, d: u16) -> LZValue {
    LZValue::length_distance(l, d)
}

#[cfg(test)]
mod test {
    use super::*;
    use crate::huffman_table::{MAX_DISTANCE, MAX_MATCH, MIN_DISTANCE, MIN_MATCH};
    #[test]
    fn lzvalue() {
        for i in 0..255 as usize + 1 {
            let v = LZValue::literal(i as u8);
            if let LZType::Literal(n) = v.value() {
                assert_eq!(n as usize, i);
            } else {
                panic!();
            }
        }

        for i in MIN_MATCH..MAX_MATCH + 1 {
            let v = LZValue::length_distance(i, 5);
            if let LZType::StoredLengthDistance(l, _) = v.value() {
                assert_eq!(l.actual_length(), i);
            } else {
                panic!();
            }
        }

        for i in MIN_DISTANCE..MAX_DISTANCE + 1 {
            let v = LZValue::length_distance(5, i);

            if let LZType::StoredLengthDistance(_, d) = v.value() {
                assert_eq!(d, i);
            } else {
                panic!("Failed to get distance {}", i);
            }
        }
    }
}