89 lines
3.7 KiB
Awk
89 lines
3.7 KiB
Awk
#From stolfi@ic.unicamp.br Sun Jan 28 19:02:09 2001
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# Sun, 28 Jan 2001 14:45:44 -0200 (EDT)
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#Date: Sun, 28 Jan 2001 14:45:44 -0200 (EDT)
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#Message-Id: <200101281645.f0SGjib16703@coruja.dcc.unicamp.br>
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#From: Jorge Stolfi <stolfi@ic.unicamp.br>
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#To: Michal Jaegermann <michal@ellpspace.math.ualberta.ca>
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#Cc: Aharon Robbins <arnold@skeeve.com>, oliva@ic.unicamp.br,
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# celio@ic.unicamp.br, ducatte@ic.unicamp.br, machado@ic.unicamp.br
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#Subject: Re: a regex.c problem
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#In-Reply-To: <20010128090314.A5820@ellpspace.math.ualberta.ca>
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#References: <200101281207.f0SC7Un08435@skeeve.com>
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# <20010128090314.A5820@ellpspace.math.ualberta.ca>
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#Reply-To: stolfi@ic.unicamp.br
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#Status: RO
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#
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#
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# > [Michal] Are there any other examples of "certain characters"
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# > which would throw this regex engine off?
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#
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#I now tested [anX]*n for X ranging trough all characters from \000 and
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#\377, and got that unexpected result only for the following ones:
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#
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# \370 | =F8 | <20> | Small o, slash
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# \371 | =F9 | <20> | Small u, grave accent
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# \372 | =FA | <20> | Small u, acute accent
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# \373 | =FB | <20> | Small u, circumflex accent
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# \374 | =FC | <20> | Small u, dieresis or umlaut mark
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# \375 | =FD | <20> | Small y, acute accent
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# \376 | =FE | <20> | Small thorn, Icelandic
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# \377 | =FF | <20> | Small y, dieresis or umlaut mark
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#
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#I have also tried those offending REs from inside emacs (20.7.1), with
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#query-replace-regexp, and it seems to be working fine. So presumably
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#the bug lies in gawk itself, or in the RE parsing code, rather than in
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#the matching engine?
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#
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#Could it be an underdimensioned table somewhere?
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#
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#Thanks for the help, and all the best
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#
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#--stolfi
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#
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# ----------------------------------------------------------------------
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#! /usr/bin/gawk -f
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BEGIN {
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for (c = 0; c < 256; c++)
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{ do_test(c); }
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}
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function do_test(char, pat,s,t)
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{
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if (char == 92) { printf "(error for \\%03o)\n", char; return; }
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pat = sprintf("[an\\%03o]*n", char);
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s = "bananas and ananases in canaan";
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t = s; gsub(pat, "AN", t); printf "%-8s %s\n", pat, t;
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# ADR: Added:
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if (s ~ pat) printf "\tmatch\n" ; else printf "\tno-match\n"
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}
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# ----------------------------------------------------------------------
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