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import streams
from strutils import repeat
proc readPaddedStr*(s: PStream, length: int, padChar = '\0'): string =
var lastChr = length
result = s.readStr(length)
while lastChr >= 0 and result[lastChr - 1] == padChar: dec(lastChr)
result.setLen(lastChr)
proc writePaddedStr*(s: PStream, str: string, length: int, padChar = '\0') =
if str.len < length:
s.write(str)
s.write(repeat(padChar, length - str.len))
elif str.len > length:
s.write(str.substr(0, length - 1))
else:
s.write(str)
proc readLEStr*(s: PStream): string =
var len = s.readInt16()
result = s.readStr(len)
proc writeLEStr*(s: PStream, str: string) =
s.write(str.len.int16)
s.write(str)
when true:
var testStream = newStringStream()
testStream.writeLEStr("Hello")
doAssert testStream.data == "\5\0Hello"
testStream.setPosition 0
var res = testStream.readLEStr()
doAssert res == "Hello"
testStream.setPosition 0
testStream.writePaddedStr("Sup", 10)
echo(repr(testStream), testStream.data.len)
doAssert testStream.data == "Sup"&repeat('\0', 7)
testStream.setPosition 0
res = testStream.readPaddedStr(10)
doAssert res == "Sup"
testStream.close()
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