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Decode HTML entities in a file.
''Copyright (c) 2007-2014, FreeBASIC Extended Library Development Group
''
''All rights reserved.
''
''Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
''
'' * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
'' * 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.
'' * Neither the name of the FreeBASIC Extended Library Development Group 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.
declare function decode_entities(byref text as const string) as string
var ftd = command()
if ftd = "" then
? "Usage: decodehtml file-to-decode"
end 42
end if
var ff = freefile
if open(ftd,for binary, access read, as ff) then
? using "Unable to open & for reading."; ftd
end 42
end if
var lenf = lof(ff)
var encoded = space(lenf)
get #ff, , encoded[0], lenf
close #ff
ff = freefile
if open(ftd,for binary, access write, as ff) then
? using "Unable to open & for writing."; ftd
end 42
end if
? #ff, decode_entities(encoded)
close #ff
function decode_entities(byref text as const string) as string
dim as string temp
dim as integer i = 1, j
do
j = instr(i, text, "&")
if (j) then
temp &= mid(text, i, j - i)
i = j + 1
j = instr(i, text, ";")
if (j) then
select case (mid(text, i, j - i + 1))
case "quot;"
temp &= """"
case "amp;"
temp &= "&"
case "apos;"
temp &= "'"
case "lt;"
temp &= "<"
case "gt;"
temp &= ">"
case else
if text[i - 1] = asc("#") then
dim as integer u
if text[i] = asc("x") then
u = val("&h" & mid(text, i + 2, j - i))
else
u = val(mid(text, i + 1, j - i))
end if
'This code does not decode unicode chars
else
temp &= "&"
j = i - 1
end if
end select
i += j - i + 1
end if
end if
loop while (j)
return temp & mid(text, i)
end function
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