nim-libp2p-experimental/libp2p/utility.nim

57 lines
1.5 KiB
Nim

## Nim-LibP2P
## Copyright (c) 2020 Status Research & Development GmbH
## Licensed under either of
## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
## * MIT license ([LICENSE-MIT](LICENSE-MIT))
## at your option.
## This file may not be copied, modified, or distributed except according to
## those terms.
{.push raises: [Defect].}
import stew/byteutils
const
ShortDumpMax = 12
func shortLog*(item: openArray[byte]): string =
if item.len <= ShortDumpMax:
result = item.toHex()
else:
const
split = ShortDumpMax div 2
dumpLen = (ShortDumpMax * 2) + 3
result = newStringOfCap(dumpLen)
result &= item.toOpenArray(0, split - 1).toHex()
result &= "..."
result &= item.toOpenArray(item.len - split, item.high).toHex()
func shortLog*(item: string): string =
if item.len <= ShortDumpMax:
result = item
else:
const
split = ShortDumpMax div 2
dumpLen = ShortDumpMax + 3
result = newStringOfCap(dumpLen)
result &= item[0..<split]
result &= "..."
result &= item[(item.len - split)..item.high]
when defined(libp2p_agents_metrics):
import strutils
export split
import stew/results
export results
proc safeToLowerAscii*(s: string): Result[string, cstring] =
try:
ok(s.toLowerAscii())
except CatchableError:
err("toLowerAscii failed")
const
KnownLibP2PAgents* {.strdefine.} = ""
KnownLibP2PAgentsSeq* = KnownLibP2PAgents.safeToLowerAscii().tryGet().split(",")