postnet.ps.src

% Barcode Writer in Pure PostScript
% https://bwipp.terryburton.co.uk
%
% Copyright (c) 2004-2024 Terry Burton
%
% $Id$
%
% Permission is hereby granted, free of charge, to any
% person obtaining a copy of this software and associated
% documentation files (the "Software"), to deal in the
% Software without restriction, including without
% limitation the rights to use, copy, modify, merge,
% publish, distribute, sublicense, and/or sell copies of
% the Software, and to permit persons to whom the Software
% is furnished to do so, subject to the following
% conditions:
%
% The above copyright notice and this permission notice
% shall be included in all copies or substantial portions
% of the Software.
%
% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
% KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
% THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
% PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
% THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
% DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
% CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
% CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
% IN THE SOFTWARE.

% --BEGIN ENCODER postnet--
% --REQUIRES preamble loadctx unloadctx raiseerror processoptions renlinear--
% --DESC: USPS POSTNET
% --EXAM: 01234
% --EXOP: includetext includecheckintext
% --RNDR: renlinear
/setpacking where {pop currentpacking true setpacking} if
10 dict
dup /loadctx dup /uk.co.terryburton.bwipp findresource put
dup /unloadctx dup /uk.co.terryburton.bwipp findresource put
dup /raiseerror dup /uk.co.terryburton.bwipp findresource put
dup /processoptions dup /uk.co.terryburton.bwipp findresource put
dup /renlinear dup /uk.co.terryburton.bwipp findresource put
begin
/postnet {

    20 dict begin

    /ctx null def
    /dontdraw false def
    /includetext false def          % Enable/disable text
    /validatecheck false def
    /includecheckintext false def
    /textfont /Courier def
    /textsize 10.0 def
    /textyoffset -7.0 def
    /height 0.125 def

    //processoptions exec /options exch def
    /barcode exch def

    /postnet //loadctx exec

    /barlen barcode length validatecheck {1 sub} if def

    % Validate the input
    barlen 5 ne barlen 9 ne and barlen 11 ne and {
        /bwipp.postnetBadLength (USPS POSTNET must be 5, 9 or 11 digits excluding check digit) //raiseerror exec
    } if
    barcode {
        dup 48 lt exch 57 gt or {
            /bwipp.postnetBadCharacter (USPS POSTNET must contain only digits) //raiseerror exec
        } if
    } forall

{
    % Create a string of the available characters
    /barchars (0123456789) def

    % Create an array containing the character mappings
    /encs
    [ (55222) (22255) (22525) (22552) (25225)
      (25252) (25522) (52225) (52252) (52522)
      (5) (5)
    ] def
} ctxdef

    /checksum 0 def
    0 1 barlen 1 sub {
        /i exch def
        /checksum checksum barcode i get 48 sub add def
    } for
    /checksum 10 checksum 10 mod sub 10 mod def
    validatecheck {
        barcode barlen get barchars checksum get ne {
            /bwipp.postnetBadCheckDigit (Incorrect USPS POSTNET check digit provided) //raiseerror exec
        } if
        /barcode barcode 0 barlen getinterval def
    } if

    /bhs barlen 5 mul 7 add array def
    /txt barlen 1 add array def

    % Put start character
    /enc encs 10 get def
    /heights enc length array def
    0 1 enc length 1 sub {
        /j exch def
        heights j enc j 1 getinterval cvi height mul 5 div put
    } for
    bhs 0 heights putinterval   % Put encoded digit into sbs

    0 1 barlen 1 sub {
        /i exch def
        /enc encs barcode i get 48 sub get def
        /heights enc length array def
        0 1 enc length 1 sub {
            /j exch def
            heights j enc j 1 getinterval cvi height mul 5 div put
        } for
        bhs i 5 mul 1 add heights putinterval   % Put encoded digit into sbs
        txt i [barcode i 1 getinterval i 5 mul 1 add 3.312 mul textyoffset textfont textsize] put
    } for

    % Put the checksum character
    /enc encs checksum get def
    /heights enc length array def
    0 1 enc length 1 sub {
        /j exch def
        heights j enc j 1 getinterval cvi height mul 5 div put
    } for
    bhs barlen 5 mul 1 add heights putinterval

    includecheckintext {
        txt barlen [barchars checksum 1 getinterval barlen 5 mul 1 add 3.312 mul textyoffset textfont textsize] put
    } {
        txt barlen [( ) barlen 5 mul 1 add 72 mul 25 div textyoffset textfont textsize] put
    } ifelse

    % Put end character
    /enc encs 11 get def
    /heights enc length array def
    0 1 enc length 1 sub {
        /j exch def
        heights j enc j 1 getinterval cvi height mul 5 div put
    } for
    bhs barlen 5 mul 6 add heights putinterval

    % Return the arguments
    <<
    /ren /renlinear
    /bhs bhs
    /bbs [bhs length {0} repeat]
    /sbs [bhs length 1 sub {1.44 1.872} repeat 1.44]
    includetext {
        /txt txt
    } if
    /opt options
    >>

    dontdraw not //renlinear if

    //unloadctx exec

    end

}
[/barcode] {null def} forall
bind def
/postnet dup load /uk.co.terryburton.bwipp defineresource pop
end
/setpacking where {pop setpacking} if
% --END ENCODER postnet--