mirror of
https://github.com/nim-lang/Nim.git
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708d9311e8
fixes #26088 in https://github.com/nim-lang/Nim/pull/25772, `beginStores` requires `newLen` to be passed for setting up the new length. So `streams.nim` must make the string length exactly newLen.
122 lines
2.7 KiB
Nim
122 lines
2.7 KiB
Nim
discard """
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matrix: "--mm:refc; --mm:orc"
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input: "Arne"
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output: '''
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Hello! What is your name?
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Nice name: Arne
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fs is: nil
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threw exception
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_heh_
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'''
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nimout: '''
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I
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AM
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GROOT
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'''
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"""
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import std/[syncio, streams, assertions]
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block tstreams:
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var outp = newFileStream(stdout)
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var inp = newFileStream(stdin)
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writeLine(outp, "Hello! What is your name?")
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var line = readLine(inp)
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writeLine(outp, "Nice name: " & line)
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block tstreams2:
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var
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fs = newFileStream("amissingfile.txt")
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line = ""
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echo "fs is: ",repr(fs)
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if not isNil(fs):
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while fs.readLine(line):
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echo line
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fs.close()
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block tstreams3:
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try:
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var fs = openFileStream("shouldneverexist.txt")
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except IOError:
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echo "threw exception"
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static:
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var s = newStringStream("I\nAM\nGROOT")
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for line in s.lines:
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echo line
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s.close
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block:
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let fs = newFileStream("amissingfile.txt")
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defer: fs.close()
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doAssert isNil(fs)
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# bug #12410
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var a = newStringStream "hehohihahuhyh"
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a.readDataStrImpl = nil
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var buffer = "_ooo_"
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doAssert a.readDataStr(buffer, 1..3) == 3
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echo buffer
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block:
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var ss = newStringStream("The quick brown fox jumped over the lazy dog.\nThe lazy dog ran")
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doAssert(ss.getPosition == 0)
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doAssert(ss.peekStr(5) == "The q")
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doAssert(ss.getPosition == 0) # haven't moved
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doAssert(ss.readStr(5) == "The q")
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doAssert(ss.getPosition == 5) # did move
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doAssert(ss.peekLine() == "uick brown fox jumped over the lazy dog.")
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doAssert(ss.getPosition == 5) # haven't moved
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var str = newString(100)
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doAssert(ss.peekLine(str))
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doAssert(str == "uick brown fox jumped over the lazy dog.")
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doAssert(ss.getPosition == 5) # haven't moved
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# bug #19707 - Ensure we dont error with writing over literals on arc/orc
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ss.setPosition(0)
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ss.write("hello")
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ss.setPosition(0)
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doAssert(ss.peekStr(5) == "hello")
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# bug #26088 - Overwriting a string stream must not truncate it
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block:
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var short = newStringStream("0123456789ABCDEF")
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short.setPosition(0)
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short.write("XX")
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doAssert short.data == "XX23456789ABCDEF"
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doAssert not short.atEnd
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var long = newStringStream("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ")
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long.setPosition(0)
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long.write("XX")
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doAssert long.data == "XX23456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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doAssert not long.atEnd
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# bug #19716
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static: # Ensure streams it doesnt break with nimscript on arc/orc #19716
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let s = newStringStream("a")
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doAssert s.data == "a"
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static: # issue #24054, readStr
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var s = newStringStream("foo bar baz")
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doAssert s.readStr(3) == "foo"
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template main =
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var strm = newStringStream("abcde")
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var buffer = "12345"
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doAssert strm.readDataStr(buffer, 0..3) == 4
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doAssert buffer == "abcd5"
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strm.close()
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static: main()
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main()
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