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1500 :: Regex newb crash. Help needed.

• jgoodgive (orginal) [2015-08-06T10:10:09+02:00] view original

  Hi, Back in nim after a break and trying to use it to create a svg sprite document from a directory full of svgs.

  
    for file in walkDir(currentDir):
      if file.kind == pcFile:
        filename = splitFile(file.path)
        filesize = getFileSize(file.path)
        if filename.ext == ".svg":
          fs = newFileStream(file.path, fmRead)
          readBuffer = fs.readStr(filesize.int)
          echo "processing: " & filename.name
          outText.add(readBuffer.string.replacef(re("(.*?\\s*?)*?preserve\\\">((.*?\\s*?)*)</svg>", {reMultiLine}), "<symbol id=\"" & filename.name & "\" viewBox=\"0 0 96 96\">$2</symbol>"))
          fs.close();
  Run

  The line breaking is when I concat the new text to the outText variable. But only on the second file/loop. No error message but a crash in runtime.

  It doesnt matter if I replace it with something like:

  
          echo readBuffer.string.replacef(re("(.*?\\s*?)*?preserve\\\">((.*?\\s*?)*)</svg>", {reMultiLine}), "foo")
  Run

  So what am I totally not understanding?

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• jgoodgive (orginal) [2015-08-06T10:41:12+02:00] view original

  Seems to crash on the first file as well if I make it longer, regardless of content. Is there a limit on the source string to regex or captures?

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• jgoodgive (orginal) [2015-08-06T11:06:32+02:00] view original

  SOLVED:

  Seems that pcre croaks on the amount of capture groups (even if I add ?: no ignore it). If I changed the code to:

  
        outText.add(readBuffer.string.replacef(re(".*?preserve\\\">(.*?)</svg>", {reMultiLine, reDotAll}), "<symbol id=\"" & filename.name & "\" viewBox=\"0 0 96 96\">$1</symbol>"))
  Run

  Things work just fine.

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• Araq (orginal) [2015-08-06T11:22:40+02:00] view original

  Do you use re or nre? Things shouldn't just crash...

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