author | Mike Kinghan <mikek@symbian.org> |
Thu, 25 Nov 2010 14:28:39 +0000 | |
branch | GCC_SURGE |
changeset 135 | 10852f1a0ae9 |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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#! /usr/bin/env python |
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# 1) Regular Expressions Test |
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# |
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# Read a file of (extended per egrep) regular expressions (one per line), |
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# and apply those to all files whose names are listed on the command line. |
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# Basically, an 'egrep -f' simulator. Test it with 20 "vt100" patterns |
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# against a five /etc/termcap files. Tests using more elaborate patters |
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# would also be interesting. Your code should not break if given hundreds |
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# of regular expressions or binary files to scan. |
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# This implementation: |
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# - combines all patterns into a single one using ( ... | ... | ... ) |
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# - reads patterns from stdin, scans files given as command line arguments |
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# - produces output in the format <file>:<lineno>:<line> |
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# - is only about 2.5 times as slow as egrep (though I couldn't run |
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# Tom's test -- this system, a vanilla SGI, only has /etc/terminfo) |
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import string |
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import sys |
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import re |
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def main(): |
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pats = map(chomp, sys.stdin.readlines()) |
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bigpat = '(' + '|'.join(pats) + ')' |
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prog = re.compile(bigpat) |
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for file in sys.argv[1:]: |
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try: |
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fp = open(file, 'r') |
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except IOError, msg: |
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print "%s: %s" % (file, msg) |
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continue |
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lineno = 0 |
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while 1: |
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line = fp.readline() |
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if not line: |
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break |
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lineno = lineno + 1 |
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if prog.search(line): |
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print "%s:%s:%s" % (file, lineno, line), |
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def chomp(s): |
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return s.rstrip('\n') |
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if __name__ == '__main__': |
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main() |