45 lines
1.6 KiB
V
45 lines
1.6 KiB
V
|
module compress
|
||
|
|
|
||
|
|
#flag -I @VEXEROOT/thirdparty/zip
|
||
|
|
#include "miniz.h"
|
||
|
|
|
||
|
|
pub const max_size = u64(1 << 31)
|
||
|
|
|
||
|
|
fn C.tdefl_compress_mem_to_heap(source_buf voidptr, source_buf_len usize, out_len &usize, flags int) voidptr
|
||
|
|
fn C.tinfl_decompress_mem_to_heap(source_buf voidptr, source_buf_len usize, out_len &usize, flags int) voidptr
|
||
|
|
|
||
|
|
// compresses an array of bytes based on providing flags and returns the compressed bytes in a new array
|
||
|
|
// see `gzip.compress([]u8)` and `zlib.compress([]u8)` for default implementations.
|
||
|
|
[manualfree]
|
||
|
|
pub fn compress(data []u8, flags int) ?[]u8 {
|
||
|
|
if u64(data.len) > compress.max_size {
|
||
|
|
return error('data too large ($data.len > $compress.max_size)')
|
||
|
|
}
|
||
|
|
mut out_len := usize(0)
|
||
|
|
|
||
|
|
address := C.tdefl_compress_mem_to_heap(data.data, data.len, &out_len, flags)
|
||
|
|
if address == 0 {
|
||
|
|
return error('compression failed')
|
||
|
|
}
|
||
|
|
if u64(out_len) > compress.max_size {
|
||
|
|
return error('compressed data is too large ($out_len > $compress.max_size)')
|
||
|
|
}
|
||
|
|
return unsafe { address.vbytes(int(out_len)) }
|
||
|
|
}
|
||
|
|
|
||
|
|
// decompresses an array of bytes based on providing flags and returns the decompressed bytes in a new array
|
||
|
|
// see `gzip.decompress([]u8)` and `zlib.decompress([]u8)` for default implementations.
|
||
|
|
[manualfree]
|
||
|
|
pub fn decompress(data []u8, flags int) ?[]u8 {
|
||
|
|
mut out_len := usize(0)
|
||
|
|
|
||
|
|
address := C.tinfl_decompress_mem_to_heap(data.data, data.len, &out_len, flags)
|
||
|
|
if address == 0 {
|
||
|
|
return error('decompression failed')
|
||
|
|
}
|
||
|
|
if u64(out_len) > compress.max_size {
|
||
|
|
return error('decompressed data is too large ($out_len > $compress.max_size)')
|
||
|
|
}
|
||
|
|
return unsafe { address.vbytes(int(out_len)) }
|
||
|
|
}
|