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The Something Awful Forums > Discussion > Serious Hardware/Software Crap > The Cavern of COBOL > C/C++ Programming Questions Not Worth Their Own Thread
 
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illamint
Jun 26, 2005

According to The Oxford English Dictionary, the word "snapshot" was originally a hunting term.
I'm fairly new to C++ and I'm wondering what the regular expression library du jour is. For a project in my CS class, we have to parse fairly large files (right now I'm going line-by-line with the regular expression "^([A-Za-z0-9]+),([A-Za-z0-9]*),([A-Za-z0-9]*),(s?f?|f?s?);$"), and I'm using regex.h which is unfortunately incredibly slow. I see that there's Boost.Regex, but we have to hand in our source code at the end of the project and I'm not sure that it's feasible to merge the Boost shared library stuff into my makefiles just for this. Should I just parse it by hand? Is there a better solution? I'm used to being able to just go to the Java or Python docs and glance at the syntax in the manual but I'm having kindof a hard time doing that with C++.

* # ¿ Mar 6, 2008 18:40
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# ¿ May 4, 2024 01:43
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illamint
Jun 26, 2005

According to The Oxford English Dictionary, the word "snapshot" was originally a hunting term.

Scaevolus posted:

Do all the lines in the file match this? If so, a regex is overkill.

vv also overkill. Writing a DFA for this would be very easy.
Match this? As in, always match? I mean, ideally they would, but we're supposed to catch syntax errors in input. It's funny, actually, this specific part of the project is an interpreter for a specific DFA language, so yeah, I thought about a DFA, but I've always just used regular expressions for things like this due to ease-of-use. I guess I'll just write up a DFA for it, since it doesn't really look like there's a library that I can assume exists on the instructor's computer.

* # ¿ Mar 7, 2008 05:38
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The Something Awful Forums > Discussion > Serious Hardware/Software Crap > The Cavern of COBOL > C/C++ Programming Questions Not Worth Their Own Thread