90 lines
2.6 KiB
Awk
90 lines
2.6 KiB
Awk
# Date: Thu, 27 Apr 2006 20:59:03 +0100
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# From: Lee Haywood <ljhaywood2@googlemail.com>
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# Subject: gawk multi-byte support bugs, assertion bug and fix.
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# To: bug-gawk@gnu.org
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# Message-id: <60962be00604271259na0d8fdayb9d0c69a853216e8@mail.gmail.com>
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# MIME-version: 1.0
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# Content-type: multipart/alternative;
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# boundary="----=_Part_10136_920879.1146167943492"
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# Status: RO
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#
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# ------=_Part_10136_920879.1146167943492
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# Content-Type: text/plain; charset=ISO-8859-1
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# Content-Transfer-Encoding: quoted-printable
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# Content-Disposition: inline
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#
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#
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# Firstly, I have been getting the following error from version 3.1.5.
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#
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# awk: node.c:515: unref: Assertion `(tmp->flags & 4096) !=3D 0' failed.
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#
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# In mk_number() in node.c the MBS_SUPPORT code is inside the GAWKDEBUG
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# section - moving it outside explicitly clears the string values, which
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# prevents the assertion error from occurring. The corrected version is
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# shown at the end of this message.
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#
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# As an aside, I also noticed that n->wstptr is not cleared by
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# set_field() and set_record() in field.c when the flags are set to
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# exclude WSTRCUR. However, I do not have a test case to show if
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# changing them makes any difference.
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#
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# A second problem also occurs when gawk 3.1.5 is compiled with
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# multi-byte character support (MBS_SUPPORT). The following code should
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# change the index of the substring "bc" from 2 to 3, but it gets
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# reported as 2 in both cases - which is obviously disastrous.
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#
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# awk 'BEGIN {
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# Value =3D "abc"
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#
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# print "Before <" Value "> ",
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# index( Value, "bc" )
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#
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# sub( /bc/, "bbc", Value )
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#
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# print "After <" Value ">",
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# index( Value, "bc" )
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# }'
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#
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# Compiling with MBS_SUPPORT undefined makes these problems go away.
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#
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# /* mk_number --- allocate a node with defined number */
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#
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# NODE *
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# mk_number(AWKNUM x, unsigned int flags)
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# {
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# register NODE *r;
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#
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# getnode(r);
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# r->type =3D Node_val;
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# r->numbr =3D x;
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# r->flags =3D flags;
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# #if defined MBS_SUPPORT
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# r->wstptr =3D NULL;
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# r->wstlen =3D 0;
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# #endif /* MBS_SUPPORT */
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# #ifdef GAWKDEBUG
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# r->stref =3D 1;
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# r->stptr =3D NULL;
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# r->stlen =3D 0;
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# #if defined MBS_SUPPORT
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# r->flags &=3D ~WSTRCUR;
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# #endif /* MBS_SUPPORT */
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# #endif /* GAWKDEBUG */
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# return r;
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# }
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#
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# Thanks.
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#
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# --
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# Lee Haywood.
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BEGIN {
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Value = "abc"
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print "Before <" Value "> ", index( Value, "bc" )
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sub( /bc/, "bbc", Value )
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print "After <" Value ">", index( Value, "bc" )
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}
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