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#![allow(non_upper_case_globals)]
#![allow(non_camel_case_types)]
#![allow(non_snake_case)]
#![allow(dead_code)]
#![allow(bad_style)]
#[repr(C)]
pub struct libdeflate_compressor { _unused : [ u8 ; 0 ] , }
#[repr(C)]
pub struct libdeflate_decompressor { _unused : [ u8 ; 0 ] , }
pub const libdeflate_result_LIBDEFLATE_SUCCESS: libdeflate_result = 0;
pub const libdeflate_result_LIBDEFLATE_BAD_DATA: libdeflate_result = 1;
pub const libdeflate_result_LIBDEFLATE_SHORT_OUTPUT: libdeflate_result = 2;
pub const libdeflate_result_LIBDEFLATE_INSUFFICIENT_SPACE: libdeflate_result = 3;
pub type libdeflate_result = u32 ;
extern "C" {
pub fn libdeflate_alloc_decompressor() -> *mut libdeflate_decompressor;
pub fn libdeflate_free_decompressor(decompressor: *mut libdeflate_decompressor);
pub fn libdeflate_gzip_decompress(decompressor: *mut libdeflate_decompressor,
in_: *const ::std::os::raw::c_void,
in_nbytes: usize ,
out: *mut ::std::os::raw::c_void,
out_nbytes_avail: usize,
actual_out_nbytes_ret: *mut usize) -> libdeflate_result;
pub fn libdeflate_zlib_decompress(decompressor: *mut libdeflate_decompressor,
in_: *const ::std::os::raw::c_void,
in_nbytes: usize,
out: *mut ::std::os::raw::c_void,
out_nbytes_avail: usize,
actual_out_nbytes_ret: *mut usize) -> libdeflate_result;
pub fn libdeflate_deflate_decompress(decompressor: *mut libdeflate_decompressor,
in_: *const ::std::os::raw::c_void,
in_nbytes: usize,
out: *mut ::std::os::raw::c_void,
out_nbytes_avail: usize,
actual_out_nbytes_ret: *mut usize) -> libdeflate_result;
pub fn libdeflate_alloc_compressor(compression_level: ::std::os::raw::c_int) -> *mut libdeflate_compressor;
pub fn libdeflate_deflate_compress_bound(compressor: *mut libdeflate_compressor,
in_nbytes: usize) -> usize;
pub fn libdeflate_deflate_compress(compressor: *mut libdeflate_compressor,
in_: *const ::std::os::raw::c_void,
in_nbytes: usize,
out: *mut ::std::os::raw::c_void,
out_nbytes_avail: usize) -> usize;
pub fn libdeflate_zlib_compress_bound(compressor: *mut libdeflate_compressor,
in_nbytes: usize) -> usize;
pub fn libdeflate_zlib_compress(compressor: *mut libdeflate_compressor,
in_: *const ::std::os::raw::c_void,
in_nbytes: usize,
out: *mut ::std::os::raw::c_void,
out_nbytes_avail: usize) -> usize;
pub fn libdeflate_gzip_compress_bound(compressor: *mut libdeflate_compressor,
in_nbytes: usize) -> usize;
pub fn libdeflate_gzip_compress(compressor: *mut libdeflate_compressor,
in_: *const ::std::os::raw::c_void,
in_nbytes: usize,
out: *mut ::std::os::raw::c_void,
out_nbytes_avail: usize ) -> usize;
pub fn libdeflate_free_compressor (compressor : * mut libdeflate_compressor);
pub fn libdeflate_crc32(crc32: u32,
buffer: *const ::std::os::raw::c_void,
len: usize) -> u32;
pub fn libdeflate_adler32(adler32: u32,
buffer: *const ::std::os::raw::c_void,
len: usize) -> u32;
pub fn libdeflate_set_memory_allocator(malloc_func: unsafe extern "C" fn(size: usize) -> *mut ::std::os::raw::c_void,
free_func: unsafe extern "C" fn(ptr: *mut ::std::os::raw::c_void));
}
#[cfg(test)]
mod tests {
use super::*;
const MIN_COMP_LVL: i32 = 1;
const MAX_COMP_LVL: i32 = 12;
#[test]
fn can_make_decompressor_at_each_compression_lvl() {
unsafe {
for lvl in MIN_COMP_LVL..MAX_COMP_LVL+1 {
let ptr = libdeflate_alloc_compressor(lvl);
assert!(!ptr.is_null());
libdeflate_free_compressor(ptr);
}
}
}
#[test]
fn making_compressor_with_negative_compression_lvl_fails() {
unsafe {
let ptr = libdeflate_alloc_compressor(-1);
assert!(ptr.is_null());
}
}
#[test]
fn making_compressor_with_too_large_compression_lvl_fails() {
unsafe {
let ptr = libdeflate_alloc_compressor(MAX_COMP_LVL+1);
assert!(ptr.is_null());
}
}
#[test]
fn can_use_compressor_to_compress_trivially_compressable_data() {
unsafe {
let in_data: [u8; 1<<16] = [0; 1<<16];
let mut out_data: [u8; 1<<16] = [0; 1<<16];
let compressor = libdeflate_alloc_compressor(MAX_COMP_LVL);
let sz = libdeflate_deflate_compress(compressor,
in_data.as_ptr() as *const core::ffi::c_void,
in_data.len(),
out_data.as_mut_ptr() as *mut core::ffi::c_void,
out_data.len());
assert_ne!(sz, 0);
assert!(sz < 100);
}
}
#[test]
fn can_call_crc32() {
let init = 0;
let buf: [u8; 4] = [0x31, 0x33, 0x33, 0x37];
unsafe {
let ret = libdeflate_crc32(init,
buf.as_ptr() as *const core::ffi::c_void,
buf.len());
assert_ne!(ret, init);
}
}
#[test]
fn can_call_adler32() {
let init = 0;
let buf: [u8; 4] = [0x31, 0x33, 0x33, 0x37];
unsafe {
let ret = libdeflate_adler32(init,
buf.as_ptr() as *const core::ffi::c_void,
buf.len());
assert_ne!(ret, init);
}
}
}