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inflate operates on seq

This commit is contained in:
Ryan Oldenburg 2020-11-07 18:45:33 -06:00
parent d43fad4932
commit 10b2289988
1 changed files with 7 additions and 6 deletions
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13
src/zippy/uncompress.nim
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@ -178,8 +178,10 @@ func inflateBlock(b: var BitStream, dst: var seq[uint8], fixedCodes: bool) =
dst.setLen(pos)
func inflate(b: var BitStream, dst: var seq[uint8]) =
var finalBlock: bool
func inflate(src: seq[uint8], dst: var seq[uint8]) =
var
b = initBitStream(src)
finalBlock: bool
while not finalBlock:
let
bfinal = b.readBits(1)
@ -211,10 +213,9 @@ func uncompress*(src: seq[uint8]): seq[uint8] =
src[src.len - 1].uint32
)
var b = initBitStream(src[0 ..< src.len - 4])
let
cmf = b.readBits(8)
flg = b.readBits(8)
cmf = src[0]
flg = src[1]
cm = cmf and 0b00001111
cinfo = cmf shr 4
@ -227,7 +228,7 @@ func uncompress*(src: seq[uint8]): seq[uint8] =
if (flg and 0b00100000) != 0: # FDICT
raise newException(ZippyError, "Preset dictionary is not yet supported")
inflate(b, result)
inflate(src[2 .. ^4], result)
if checksum != adler32(result):
raise newException(ZippyError, "Checksum verification failed")