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xmlformat is distributed under a BSD-style license. This license | |
applies to the entire xmlformat distribution, with the exception of | |
the REX parser (described below). | |
Copyright (c) 2004, 2005, Kitebird, LLC. All rights reserved. | |
Redistribution and use in source and binary forms, with or without | |
modification, are permitted provided that the following conditions | |
are met: | |
1. Redistributions of source code must retain the above copyright | |
notice, this list of conditions and the following disclaimer. | |
2. Redistributions in binary form must reproduce the above copyright | |
notice, this list of conditions and the following disclaimer in the | |
documentation and/or other materials provided with the distribution. | |
3. Neither the name of Kitebird nor the names of its contributors may | |
be used to endorse or promote products derived from this software | |
without specific prior written permission. | |
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
POSSIBILITY OF SUCH DAMAGE. | |
---------------------------------------------------------------------- | |
The REX parser | |
xmlformat contains code based on the REX parser, which is Copyright (c) 1998, | |
Robert D. Cameron. REX is described in this document: | |
http://www.cs.sfu.ca/~cameron/REX.html | |
The document contains a Perl implementation of REX: | |
--- begin REX code --- | |
# REX/Perl 1.0 | |
# Robert D. Cameron "REX: XML Shallow Parsing with Regular Expressions", | |
# Technical Report TR 1998-17, School of Computing Science, Simon Fraser | |
# University, November, 1998. | |
# Copyright (c) 1998, Robert D. Cameron. | |
# The following code may be freely used and distributed provided that | |
# this copyright and citation notice remains intact and that modifications | |
# or additions are clearly identified. | |
$TextSE = "[^<]+"; | |
$UntilHyphen = "[^-]*-"; | |
$Until2Hyphens = "$UntilHyphen(?:[^-]$UntilHyphen)*-"; | |
$CommentCE = "$Until2Hyphens>?"; | |
$UntilRSBs = "[^\\]]*](?:[^\\]]+])*]+"; | |
$CDATA_CE = "$UntilRSBs(?:[^\\]>]$UntilRSBs)*>"; | |
$S = "[ \\n\\t\\r]+"; | |
$NameStrt = "[A-Za-z_:]|[^\\x00-\\x7F]"; | |
$NameChar = "[A-Za-z0-9_:.-]|[^\\x00-\\x7F]"; | |
$Name = "(?:$NameStrt)(?:$NameChar)*"; | |
$QuoteSE = "\"[^\"]*\"|'[^']*'"; | |
$DT_IdentSE = "$S$Name(?:$S(?:$Name|$QuoteSE))*"; | |
$MarkupDeclCE = "(?:[^\\]\"'><]+|$QuoteSE)*>"; | |
$S1 = "[\\n\\r\\t ]"; | |
$UntilQMs = "[^?]*\\?+"; | |
$PI_Tail = "\\?>|$S1$UntilQMs(?:[^>?]$UntilQMs)*>"; | |
$DT_ItemSE = | |
"<(?:!(?:--$Until2Hyphens>|[^-]$MarkupDeclCE)|\\?$Name(?:$PI_Tail))|%$Name;|$S"; | |
$DocTypeCE = "$DT_IdentSE(?:$S)?(?:\\[(?:$DT_ItemSE)*](?:$S)?)?>?"; | |
$DeclCE = | |
"--(?:$CommentCE)?|\\[CDATA\\[(?:$CDATA_CE)?|DOCTYPE(?:$DocTypeCE)?"; | |
$PI_CE = "$Name(?:$PI_Tail)?"; | |
$EndTagCE = "$Name(?:$S)?>?"; | |
$AttValSE = "\"[^<\"]*\"|'[^<']*'"; | |
$ElemTagCE = "$Name(?:$S$Name(?:$S)?=(?:$S)?(?:$AttValSE))*(?:$S)?/?>?"; | |
$MarkupSPE = | |
"<(?:!(?:$DeclCE)?|\\?(?:$PI_CE)?|/(?:$EndTagCE)?|(?:$ElemTagCE)?)"; | |
$XML_SPE = "$TextSE|$MarkupSPE"; | |
sub ShallowParse { | |
my($XML_document) = @_; | |
return $XML_document =~ /$XML_SPE/g; | |
} | |
--- end REX code --- | |
The Perl and Ruby implementations of xmlformat contain parsers that | |
are based on the preceding code and are essentially the same, with the | |
exception of changes to variable and function names. |
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