/usr/lib/tcltk/rivet2.2/packages/tclrivet/tclrivetparser.tcl is in libapache2-mod-rivet 2.2.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 | # tclrivetparser.tcl -- parse Rivet files in pure Tcl.
# Copyright 2003-2004 The Apache Software Foundation
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# $Id: tclrivetparser.tcl 1337750 2012-05-13 00:26:20Z mxmanghi $
package provide tclrivetparser 0.1
namespace eval tclrivetparser {
set starttag <?
set endtag ?>
set outputcmd {puts -nonewline}
namespace export parserivetdata
}
# tclrivetparser::setoutputcmd --
#
# Set the output command used. In regular Rivet scripts, we use
# puts, but that might not be ideal if you want to parse Rivet
# pages in a Tcl script.
#
# Arguments:
# newcmd - if empty, return the current command, if not, set the
# command.
#
# Side Effects:
# May set the output command used.
#
# Results:
# The current output command.
proc tclrivetparser::setoutputcmd { {newcmd ""} } {
variable outputcmd
if { $outputcmd == "" } {
return $outputcmd
}
set outputcmd $newcmd
}
# tclrivetparser::parse --
#
# Parse a buffer, transforming <? and ?> into the appropriate
# Tcl strings. Note that initial 'puts "' is not performed
# here.
#
# Arguments:
# data - data to scan.
# outbufvar - name of the output buffer.
#
# Side Effects:
# None.
#
# Results:
# Returns the $inside variable - 1 if we are inside a <? ?>
# section, 0 if we outside.
proc tclrivetparser::parse { data outbufvar } {
variable outputcmd
variable starttag
variable endtag
set inside 0
set shorthand 0
upvar $outbufvar outbuf
set i 0
set p 0
set len [expr {[string length $data] + 1}]
set next [string index $data 0]
while {$i < $len} {
incr i
set cur $next
set next [string index $data $i]
if { $inside == 0 } {
# Outside the delimiting tags.
if { $cur == [string index $starttag $p] } {
incr p
if { $p == [string length $starttag] } {
if {$next == "="} {
# puts stderr "shorthand begin detected"
append outbuf "\"\n $outputcmd "
set shorthand 1
incr i
set next [string index $data $i]
} else {
append outbuf "\"\n"
}
set inside 1
set p 0
continue
}
} else {
if { $p > 0 } {
append outbuf [string range $starttag 0 [expr {$p - 1}]]
set p 0
}
switch -exact -- $cur {
"\{" {
append outbuf \ $cur
}
"\}" {
append outbuf \ $cur
}
"\$" {
append outbuf "\\$"
}
"\[" {
append outbuf "\\["
}
"\]" {
append outbuf "\\]"
}
"\"" {
append outbuf "\\\""
}
"\\" {
append outbuf "\\\\"
}
default {
append outbuf $cur
}
}
continue
}
} else {
# Inside the delimiting tags.
if { $cur == [string index $endtag $p] } {
incr p
if { $p == [string length $endtag] } {
if {$shorthand} {
# puts stderr "shorthand end detected"
set shorthand 0
}
append outbuf "\n$outputcmd \""
set inside 0
set p 0
}
} else {
if { $p > 0 } {
append outbuf [string range $endtag 0 $p]
set p 0
}
append outbuf $cur
}
}
}
return $inside
}
# tclrivetparser::parserivetdata --
#
# Parse a rivet script, and add the relavant opening and closing
# bits.
#
# Arguments:
# data - data to parse.
#
# Side Effects:
# None.
#
# Results:
# Returns the parsed script.
proc tclrivetparser::parserivetdata { data } {
variable outputcmd
set outbuf {}
append outbuf "$outputcmd \""
if { [parse $data outbuf] == 0 } {
append outbuf "\"\n"
}
return $outbuf
}
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