1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
# From hankedr@dms.auburn.edu Sun Jan 28 12:25:43 2001
# Received: from mail.actcom.co.il [192.114.47.13]
# by localhost with POP3 (fetchmail-5.5.0)
# for arnold@localhost (single-drop); Sun, 28 Jan 2001 12:25:43 +0200 (IST)
# Received: by actcom.co.il (mbox arobbins)
# (with Cubic Circle's cucipop (v1.31 1998/05/13) Sun Jan 28 12:27:08 2001)
# X-From_: hankedr@dms.auburn.edu Sat Jan 27 15:15:57 2001
# Received: from lmail.actcom.co.il by actcom.co.il with ESMTP
# (8.9.1a/actcom-0.2) id PAA23801 for <arobbins@actcom.co.il>;
# Sat, 27 Jan 2001 15:15:55 +0200 (EET)
# (rfc931-sender: lmail.actcom.co.il [192.114.47.13])
# Received: from billohost.com (www.billohost.com [209.196.35.10])
# by lmail.actcom.co.il (8.9.3/8.9.1) with ESMTP id PAA15998
# for <arobbins@actcom.co.il>; Sat, 27 Jan 2001 15:16:27 +0200
# Received: from yak.dms.auburn.edu (yak.dms.auburn.edu [131.204.53.2])
# by billohost.com (8.9.3/8.9.3) with ESMTP id IAA00467
# for <arnold@skeeve.com>; Sat, 27 Jan 2001 08:15:52 -0500
# Received: (from hankedr@localhost)
# by yak.dms.auburn.edu (8.9.3/8.9.3/Debian/GNU) id HAA24441;
# Sat, 27 Jan 2001 07:15:44 -0600
# Date: Sat, 27 Jan 2001 07:15:44 -0600
# Message-Id: <200101271315.HAA24441@yak.dms.auburn.edu>
# From: Darrel Hankerson <hankedr@dms.auburn.edu>
# To: arnold@skeeve.com
# Subject: [stolfi@ic.unicamp.br: Bug in [...]* matching with acute-u]
# Mime-Version: 1.0 (generated by tm-edit 7.106)
# Content-Type: message/rfc822
# Status: R
#
# From: Jorge Stolfi <stolfi@ic.unicamp.br>
# To: bug-gnu-utils@gnu.org
# Subject: Bug in [...]* matching with acute-u
# MIME-Version: 1.0
# Reply-To: stolfi@ic.unicamp.br
# X-MIME-Autoconverted: from 8bit to quoted-printable by grande.dcc.unicamp.br id GAA10716
# Sender: bug-gnu-utils-admin@gnu.org
# Errors-To: bug-gnu-utils-admin@gnu.org
# X-BeenThere: bug-gnu-utils@gnu.org
# X-Mailman-Version: 2.0
# Precedence: bulk
# List-Help: <mailto:bug-gnu-utils-request@gnu.org?subject=help>
# List-Post: <mailto:bug-gnu-utils@gnu.org>
# List-Subscribe: <http://mail.gnu.org/mailman/listinfo/bug-gnu-utils>,
# <mailto:bug-gnu-utils-request@gnu.org?subject=subscribe>
# List-Id: Bug reports for the GNU utilities <bug-gnu-utils.gnu.org>
# List-Unsubscribe: <http://mail.gnu.org/mailman/listinfo/bug-gnu-utils>,
# <mailto:bug-gnu-utils-request@gnu.org?subject=unsubscribe>
# List-Archive: <http://mail.gnu.org/pipermail/bug-gnu-utils/>
# Date: Sat, 27 Jan 2001 06:46:11 -0200 (EDT)
# Content-Transfer-Encoding: 8bit
# X-MIME-Autoconverted: from quoted-printable to 8bit by manatee.dms.auburn.edu id CAA14936
# Content-Type: text/plain; charset=iso-8859-1
# <mailto:bug-gnu-utils-request@gnu.org?subject=subscribe>
# <mailto:bug-gnu-utils-request@gnu.org?subject=uns
# Content-Length: 3137
#
#
#
# Hi,
#
# I think I have run into a bug in gawk's handling of REs of the
# form [...]* when the bracketed list includes certain 8-bit characters,
# specifically u-acute (octal \372).
#
# The problem occurs in GNU Awk 3.0.4, both under
# Linux 2.2.14-5.0 (intel i686) and SunOS 5.5 (Sun sparc).
#
# Here is a program that illustrates the bug, and its output.
# The first two lines of the output should be equal, shouldn't they?
#
# ----------------------------------------------------------------------
#! /usr/bin/gawk -f
BEGIN {
s = "bananas and ananases in canaan";
t = s; gsub(/[an]*n/, "AN", t); printf "%-8s %s\n", "[an]*n", t;
t = s; gsub(/[anú]*n/, "AN", t); printf "%-8s %s\n", "[anú]*n", t;
print "";
t = s; gsub(/[aú]*n/, "AN", t); printf "%-8s %s\n", "[aú]*n", t;
print "";
t = s; gsub(/[an]n/, "AN", t); printf "%-8s %s\n", "[an]n", t;
t = s; gsub(/[aú]n/, "AN", t); printf "%-8s %s\n", "[aú]n", t;
t = s; gsub(/[anú]n/, "AN", t); printf "%-8s %s\n", "[anú]n", t;
print "";
t = s; gsub(/[an]?n/, "AN", t); printf "%-8s %s\n", "[an]?n", t;
t = s; gsub(/[aú]?n/, "AN", t); printf "%-8s %s\n", "[aú]?n", t;
t = s; gsub(/[anú]?n/, "AN", t); printf "%-8s %s\n", "[anú]?n", t;
print "";
t = s; gsub(/[an]+n/, "AN", t); printf "%-8s %s\n", "[an]+n", t;
t = s; gsub(/[aú]+n/, "AN", t); printf "%-8s %s\n", "[aú]+n", t;
t = s; gsub(/[anú]+n/, "AN", t); printf "%-8s %s\n", "[anú]+n", t;
}
# ----------------------------------------------------------------------
# [an]*n bANas ANd ANases iAN cAN
# [anú]*n bananas and ananases in canaan
#
# [aú]*n bANANas ANd ANANases iAN cANAN
#
# [an]n bANANas ANd ANANases in cANaAN
# [aú]n bANANas ANd ANANases in cANaAN
# [anú]n bANANas ANd ANANases in cANaAN
#
# [an]?n bANANas ANd ANANases iAN cANaAN
# [aú]?n bANANas ANd ANANases iAN cANaAN
# [anú]?n bANANas ANd ANANases iAN cANaAN
#
# [an]+n bANas ANd ANases in cAN
# [aú]+n bANANas ANd ANANases in cANAN
# [anú]+n bananas and ananases in canaan
# ----------------------------------------------------------------------
#
# Apparently the problem is specific to u-acute; I've tried several
# other 8-bit characters and they seem to behave as expected.
#
# By comparing the second and third output lines, it would seem that the
# problem involves backtracking out of a partial match of [...]* in
# order to match the next sub-expression, when the latter begins with
# one of the given characters.
#
#
# All the best,
#
# --stolfi
#
# ------------------------------------------------------------------------
# Jorge Stolfi | http://www.dcc.unicamp.br/~stolfi | stolfi@dcc.unicamp.br
# Institute of Computing (formerly DCC-IMECC) | Wrk +55 (19)3788-5858
# Universidade Estadual de Campinas (UNICAMP) | +55 (19)3788-5840
# Av. Albert Einstein 1251 - Caixa Postal 6176 | Fax +55 (19)3788-5847
# 13083-970 Campinas, SP -- Brazil | Hom +55 (19)3287-4069
# ------------------------------------------------------------------------
#
# _______________________________________________
# Bug-gnu-utils mailing list
# Bug-gnu-utils@gnu.org
# http://mail.gnu.org/mailman/listinfo/bug-gnu-utils
#
#
|
