brotli 5.0.0

A brotli compressor and decompressor that with an interface avoiding the rust stdlib. This makes it suitable for embedded devices and kernels. It is designed with a pluggable allocator so that the standard lib's allocator may be employed. The default build also includes a stdlib allocator and stream interface. Disable this with --features=no-stdlib. All included code is safe.
Documentation 
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
121
122
123
124
125
126
127
128
129
130

pub use brotli_decompressor::ffi::interface::c_void;
use brotli_decompressor::ffi::{slice_from_raw_parts_or_nil, slice_from_raw_parts_or_nil_mut};
use concat::BroCatli;
pub use concat::BroCatliResult;
use core;
pub type BroccoliResult = BroCatliResult;
// a tool to concatenate brotli files together

#[repr(C)]
pub struct BroccoliState {
    more_data: *mut c_void,
    current_data: [u8; 120],
}

impl Clone for BroccoliState {
    fn clone(&self) -> BroccoliState {
        let mut cd = [0u8; 120];
        cd.clone_from_slice(&self.current_data[..]);
        BroccoliState {
            more_data: self.more_data,
            current_data: cd,
        }
    }
}

impl Copy for BroccoliState {}

impl Default for BroccoliState {
    fn default() -> BroccoliState {
        BroCatli::new().into()
    }
}
impl From<BroCatli> for BroccoliState {
    fn from(data: BroCatli) -> BroccoliState {
        let mut buffer = [0u8; 120];
        data.serialize_to_buffer(&mut buffer[..]).unwrap();
        BroccoliState {
            more_data: core::ptr::null_mut(),
            current_data: buffer,
        }
    }
}
impl From<BroccoliState> for BroCatli {
    fn from(val: BroccoliState) -> Self {
        BroCatli::deserialize_from_buffer(&val.current_data[..]).unwrap()
    }
}

#[no_mangle]
pub extern "C" fn BroccoliCreateInstance() -> BroccoliState {
    BroCatli::new().into()
}
#[no_mangle]
pub extern "C" fn BroccoliCreateInstanceWithWindowSize(window_size: u8) -> BroccoliState {
    BroCatli::new_with_window_size(window_size).into()
}
#[no_mangle]
pub extern "C" fn BroccoliDestroyInstance(_state: BroccoliState) {}

#[no_mangle]
pub unsafe extern "C" fn BroccoliNewBrotliFile(state: *mut BroccoliState) {
    let mut bro_catli: BroCatli = (*state).into();
    bro_catli.new_brotli_file();
    *state = BroccoliState::from(bro_catli);
}

#[no_mangle]
pub unsafe extern "C" fn BroccoliConcatStream(
    state: *mut BroccoliState,
    available_in: *mut usize,
    input_buf_ptr: *mut *const u8,
    available_out: *mut usize,
    output_buf_ptr: *mut *mut u8,
) -> BroccoliResult {
    let input_buf = slice_from_raw_parts_or_nil(*input_buf_ptr, *available_in);
    let output_buf = slice_from_raw_parts_or_nil_mut(*output_buf_ptr, *available_out);
    let mut input_offset = 0usize;
    let mut output_offset = 0usize;
    let mut bro_catli: BroCatli = (*state).into();
    let ret = bro_catli.stream(input_buf, &mut input_offset, output_buf, &mut output_offset);
    *input_buf_ptr = (*input_buf_ptr).add(input_offset);
    *output_buf_ptr = (*output_buf_ptr).add(output_offset);
    *available_in -= input_offset;
    *available_out -= output_offset;
    *state = BroccoliState::from(bro_catli);
    ret
}

#[no_mangle]
pub unsafe extern "C" fn BroccoliConcatStreaming(
    state: *mut BroccoliState,
    available_in: *mut usize,
    mut input_buf: *const u8,
    available_out: *mut usize,
    mut output_buf: *mut u8,
) -> BroccoliResult {
    BroccoliConcatStream(
        state,
        available_in,
        &mut input_buf,
        available_out,
        &mut output_buf,
    )
}

#[no_mangle]
pub unsafe extern "C" fn BroccoliConcatFinish(
    state: *mut BroccoliState,
    available_out: *mut usize,
    output_buf_ptr: *mut *mut u8,
) -> BroCatliResult {
    let output_buf = slice_from_raw_parts_or_nil_mut(*output_buf_ptr, *available_out);
    let mut output_offset = 0usize;
    let mut bro_catli: BroCatli = (*state).into();
    let ret = bro_catli.finish(output_buf, &mut output_offset);
    *output_buf_ptr = (*output_buf_ptr).add(output_offset);
    *available_out -= output_offset;
    *state = BroccoliState::from(bro_catli);
    ret
}

// exactly the same as BrotliConcatFinish but without the indirect
#[no_mangle]
pub unsafe extern "C" fn BroccoliConcatFinished(
    state: *mut BroccoliState,
    available_out: *mut usize,
    mut output_buf: *mut u8,
) -> BroCatliResult {
    BroccoliConcatFinish(state, available_out, &mut output_buf)
}