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v/vlib/compress/compress.v

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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
// NB: this is a low level api, a high level implementation like zlib/gzip should be preferred
[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 > $compress.max_size)')
}
return unsafe { address.vbytes(int(out_len)) }
}
// decompresses an array of bytes based on providing flags and returns the decompressed bytes in a new array
// NB: this is a low level api, a high level implementation like zlib/gzip should be preferred
[manualfree]
pub fn decompress(data []u8, flags int) ![]u8 {
mut out_len := usize(0)
address := C.tinfl_decompress_mem_to_heap(data.data, data.len, &out_len, flags)
if address == 0 {
return error('decompression failed')
}
if u64(out_len) > compress.max_size {
return error('decompressed data is too large ($out_len > $compress.max_size)')
}
return unsafe { address.vbytes(int(out_len)) }
}