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3d2f0e2c7c
* make more standard libraries work with `nimPreviewSlimSystem` * typo * part two * Delete specutils.nim * fixes more tests * more fixes * fixes tests * fixes three more tests * add formatfloat import * fix * last
56 lines
1.3 KiB
Nim
56 lines
1.3 KiB
Nim
discard """
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output: '''
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Created size: 10
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Position after writing: 5
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Position after writing one char: 6
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Peeked data: Hello
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Position after peeking: 0
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Readed data: Hello!
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Position after reading line: 7
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Position after setting position: 6
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Readed line: Hello!
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Position after reading line: 7'''
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"""
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import os, streams, memfiles
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import std/syncio
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const
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fn = "test.mmapstream"
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var
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mms: MemMapFileStream
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if fileExists(fn): removeFile(fn)
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# Create a new memory mapped file, data all zeros
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mms = newMemMapFileStream(fn, mode = fmReadWrite, fileSize = 10)
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mms.close()
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if fileExists(fn): echo "Created size: ", getFileSize(fn)
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# write, flush, peek, read
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mms = newMemMapFileStream(fn, mode = fmReadWrite)
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let s = "Hello"
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mms.write(s)
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mms.flush
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echo "Position after writing: ", mms.getPosition()
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mms.write('!')
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mms.flush
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echo "Position after writing one char: ", mms.getPosition()
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mms.close()
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mms = newMemMapFileStream(fn, mode = fmRead)
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echo "Peeked data: ", mms.peekStr(s.len)
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echo "Position after peeking: ", mms.getPosition()
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echo "Readed data: ", mms.readLine
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echo "Position after reading line: ", mms.getPosition()
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mms.setPosition(mms.getPosition() - 1)
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echo "Position after setting position: ", mms.getPosition()
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mms.setPosition(0)
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echo "Readed line: ", mms.readLine
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echo "Position after reading line: ", mms.getPosition()
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mms.close()
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if fileExists(fn): removeFile(fn)
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