this is malformed
[^[><]]
its taken as 2 REs
[^[><]
and the literal char
]
has to be specified like this
[^]><[]
On Thu, 21 Jun 2012 02:07:20 +0200 Roland Mainz wrote:
> AFAIK we found a bug in the libast regex engine which manifests itself
> when it should match&&capture text with '[' charcaters.
> The following example (derived from Olga's previous work on a
> quick&&dirty XML document scanner) shows the issue (note the "[TEXT]"
> in variable "xmltext"):
> -- snip --
> xmltext='<h1><div> a text </div>More [TEXT].<!-- a comment
> (<disabled>) --></h1>'
> # parse
> dummy="${xmltext//~(Ex)(?:
> (<!--.+-->)+?| # xml comments
> (<.+>)+?| # xml tags
> ([^[><]]+)+? # xml text
> )/dummy}"
> # debug output
> printf 'dummy=%q\n' "${dummy}"
> print -v .sh.match
> # rebuild the original text, based on our matches
> nameref nodes_all=.sh.match[0] # contains all matches
> nameref nodes_comments=.sh.match[1] # contains only XML comment matches
> nameref nodes_tags=.sh.match[2] # contains only XML tag matches
> nameref nodes_text=.sh.match[3] # contains only XML text matches
> integer i
> for (( i = 0 ; i <= ${#nodes_all[@]} ; i++ )) ; do
> [[ -v nodes_comments[i] ]] && printf '%s' "${nodes_comments[i]}"
> [[ -v nodes_tags[i] ]] && printf '%s' "${nodes_tags[i]}"
> [[ -v nodes_text[i] ]] && printf '%s' "${nodes_text[i]}"
> done
> printf '\n'
> -- snip --
> If I run the example i get the following output. First sign of trouble
> is the '[' character in the "...dummydummy[dummy..." output. It looks
> like the '[' wasn't simple matched by any of the patterns:
> -- snip --
> $ ./arch/sol11.i386\-64/bin/ksh xmlparse.sh
> dummy='dummydummydummydummydummydummydummydummydummydummydummydummydummydummydummydummy[dummydummydummydummydummydummydummydummy'
> (
> (
> [0]='<h1>'
> [1]='<div>'
> [2]=' '
> [3]=a
> [4]=' '
> [5]=t
> [6]=e
> [7]=x
> [8]=t
> [9]=' '
> [10]='</div>'
> [11]=M
> [12]=o
> [13]=r
> [14]=e
> [15]=' '
> [16]=T
> [17]=E
> [18]=X
> [19]=T
> [20]=']'
> [21]=.
> [22]='<!-- a comment (<disabled>) -->'
> [23]='</h1>'
> )
> (
> [22]='<!-- a comment (<disabled>) -->'
> )
> (
> [0]='<h1>'
> [1]='<div>'
> [10]='</div>'
> [23]='</h1>'
> )
> (
> [2]=' '
> [3]=a
> [4]=' '
> [5]=t
> [6]=e
> [7]=x
> [8]=t
> [9]=' '
> [11]=M
> [12]=o
> [13]=r
> [14]=e
> [15]=' '
> [16]=T
> [17]=E
> [18]=X
> [19]=T
> [20]=']'
> [21]=.
> )
> )
> <h1><div> a text </div>More TEXT].<!-- a comment (<disabled>) --></h1>
> -- snip --
> Glenn: What do you think ? It looks like that ([^[><]]+)+? does not
> generate matches for '[', right ?
> ----
> Bye,
> Roland
> --
> __ . . __
> (o.\ \/ /.o) roland.ma...@nrubsig.org
> \__\/\/__/ MPEG specialist, C&&JAVA&&Sun&&Unix programmer
> /O /==\ O\ TEL +49 641 3992797
> (;O/ \/ \O;)
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