logos-storage/nim-contract-abi
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Use similar terminology when encoding and decoding

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For writing custom decoding functions, `decode` and `read`
now work the same as `encode` and `write for encoding.
This commit is contained in:
Mark Spanbroek 2021-11-30 16:52:23 +01:00
parent 4126edf89f
commit 3015760b3e
1 changed files with 12 additions and 11 deletions
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23
contractabi/decoding.nim
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@ -43,20 +43,21 @@ func read(decoder: var AbiDecoder, amount: int, padding = padLeft): seq[byte] =
if padding == padRight:
decoder.advance(padlen)
func read*(decoder: var AbiDecoder, T: type UInt): T =
func read*(decoder: var AbiDecoder, T: type): T =
decoder.decode(T)
func decode*(decoder: var AbiDecoder, T: type UInt): T =
T.fromBytesBE(decoder.read(sizeof(T)))
func read*(decoder: var AbiDecoder, T: type bool): T =
func decode*(decoder: var AbiDecoder, T: type bool): T =
decoder.read(uint8) != 0
func read*(decoder: var AbiDecoder, T: type enum): T =
func decode*(decoder: var AbiDecoder, T: type enum): T =
T(decoder.read(uint64))
func read*[I: static int](decoder: var AbiDecoder, T: type array[I, byte]): T =
func decode*[I: static int](decoder: var AbiDecoder, T: type array[I,byte]): T =
result[0..<I] = decoder.read(I, padRight)
func read*(decoder: var AbiDecoder, T: type seq[byte]): T
func readOffset(decoder: var AbiDecoder): int =
let offset = decoder.read(uint64)
decoder.currentTuple.start + offset.int
@ -67,7 +68,7 @@ func readTail(decoder: var AbiDecoder, T: type seq[byte]): T =
result = tailDecoder.read(T)
decoder.updateFinish(tailDecoder.index)
func read*(decoder: var AbiDecoder, T: type seq[byte]): T =
func decode*(decoder: var AbiDecoder, T: type seq[byte]): T =
if decoder.currentTuple.dynamic:
decoder.readTail(T)
else:
@ -95,24 +96,24 @@ func finish*(decoder: var AbiDecoder) =
doAssert decoder.index == decoder.bytes.len, "unread trailing bytes found"
doAssert decoder.index mod 32 == 0, "encoding variant broken"
func read*[T](decoder: var AbiDecoder, _: type seq[T]): seq[T] =
func decode*[T](decoder: var AbiDecoder, _: type seq[T]): seq[T] =
let len = decoder.read(uint64)
decoder.startTuple(dynamic=true)
for _ in 0..<len:
result.add(decoder.read(T))
decoder.finishTuple()
func read*[I,T](decoder: var AbiDecoder, _: type array[I,T]): array[I,T] =
func decode*[I,T](decoder: var AbiDecoder, _: type array[I,T]): array[I,T] =
const dynamic = AbiEncoder.isDynamic(T)
decoder.startTuple(dynamic)
for i in 0..<result.len:
result[i] = decoder.read(T)
decoder.finishTuple()
func read*(decoder: var AbiDecoder, T: type string): T =
func decode*(decoder: var AbiDecoder, T: type string): T =
string.fromBytes(decoder.read(seq[byte]))
func decode*(_: type AbiDecoder, bytes: seq[byte], T: type): T =
var decoder = AbiDecoder.init(bytes)
result = decoder.read(T)
result = decoder.decode(T)
decoder.finish()