40 lines
No EOL
1 KiB
Nim
40 lines
No EOL
1 KiB
Nim
import zlib
|
|
|
|
proc compress*(source: string): string =
|
|
var
|
|
sourcelen = source.len
|
|
destlen = sourcelen + (sourcelen.float * 0.1).int + 16
|
|
result = ""
|
|
result.setLen destLen
|
|
var res = zlib.compress(cstring(result), addr destLen, cstring(source), sourceLen)
|
|
if res != Z_OK:
|
|
echo "Error occurred: ", res
|
|
elif destLen < result.len:
|
|
result.setLen(destLen)
|
|
|
|
proc uncompress*(source: string, destLen: var int): string =
|
|
result = ""
|
|
result.setLen destLen
|
|
var res = zlib.uncompress(cstring(result), addr destLen, cstring(source), source.len)
|
|
if res != Z_OK:
|
|
echo "Error occurred: ", res
|
|
|
|
|
|
when isMainModule:
|
|
import strutils
|
|
var r = compress("Hello")
|
|
echo repr(r)
|
|
var ln = "Hello".len
|
|
var rr = uncompress(r, ln)
|
|
echo repr(rr)
|
|
assert rr == "Hello"
|
|
|
|
proc `*`(a: string; b: int): string {.inline.} = result = repeat(a, b)
|
|
var s = "yo dude sup bruh homie" * 50
|
|
r = compress(s)
|
|
echo s.len, " -> ", r.len
|
|
|
|
ln = s.len
|
|
rr = uncompress(r, ln)
|
|
echo r.len, " -> ", rr.len
|
|
assert rr == s |