mirror of
https://github.com/zint/zint
synced 2024-11-16 20:57:25 +13:00
5e2044ff2e
encodation in certain cases (and no pessimizations found so far), props lyngklip (BWIPP); fix extended char latching when exactly 3 extended chars at end; count code set C (not digits) in loop deciding when to shift/latch to extended for better estimate AZTEC: return warning if ECC < 5% (due to bit-stuffing when version given); return error if > 22 layers (Zint 26) for Reader Initialisation symbol requested for better error message AZTEC/HANXIN/QRCODE: consolidate different ECC data size tables into one indexed by ECC DBAR_EXP: check for reduced length <= 77 up front for better error message HANXIN: use `malloc()` rather than `z_alloca()` for large binary array QRCODE: `ecc_level` now 0-based (not 1-based) MICROQR: consolidate different version end routines into one `microqr_end()` and use new `microqr_data` table to simplify code MICROPDF417: use table for max codewords per column library: centralize all error messages using new `errtxt()`, `errtxtf()`, `errtxt_adj()` funcs that protect `symbol->errtxt` from overflow, & try to make error messages more consistent thru-out, adding more feedback info to many, & use positional args "%n$" in prep for l10n (maybe); `is_sane/is_sane_lookup()` -> `not_sane/not_sane_lookup()`, returning 1-based position (zero on failure) instead of bool; `long` ints -> plain `int` (except those dealing with `ftell()`, `fread()` etc) as depend on int being 32-bits already GUI: in "grpDATF.ui" use "PlainText" rather than "RichText" for tracker ratio examples as height of text messing up sometimes manual: clarify Codablock-F length maximum & add examples docs: README: pandoc 3.5, Ubuntu 24.04 CMake: use "-Wpedantic" for Clang only as GNU complains about `errtxtf()` positional args "%n$"
552 lines
19 KiB
C
552 lines
19 KiB
C
/* code16k.c - Handles Code 16k stacked symbology */
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/*
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libzint - the open source barcode library
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Copyright (C) 2008-2024 Robin Stuart <rstuart114@gmail.com>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the project nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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/* SPDX-License-Identifier: BSD-3-Clause */
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/* Updated to comply with BS EN 12323:2005 */
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/* Code 16k can hold up to 77 characters or 154 numbers */
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#include <assert.h>
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#include <stdio.h>
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#include "common.h"
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#include "code128.h"
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/* Note these previously defined in "code128.h" - keeping `C128_` prefix for now */
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#define C128_LATCHA 'A'
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#define C128_LATCHB 'B'
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#define C128_LATCHC 'C'
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#define C128_SHIFTA 'a'
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#define C128_SHIFTB 'b'
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#define C128_ABORC '9'
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#define C128_AORB 'Z'
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/* Note using C128Table with extra entry at 106 (Triple Shift) for C16KTable */
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/* EN 12323 Table 3 and Table 4 - Start patterns and stop patterns */
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static const char C16KStartStop[8][4] = {
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{'3','2','1','1'}, {'2','2','2','1'}, {'2','1','2','2'}, {'1','4','1','1'},
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{'1','1','3','2'}, {'1','2','3','1'}, {'1','1','1','4'}, {'3','1','1','2'}
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};
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/* EN 12323 Table 5 - Start and stop values defining row numbers */
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static const unsigned char C16KStartValues[16] = {
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0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7
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};
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static const unsigned char C16KStopValues[16] = {
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0, 1, 2, 3, 4, 5, 6, 7, 4, 5, 6, 7, 0, 1, 2, 3
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};
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/* Determine appropriate mode for a given character (was `c128_parunmodd()`) */
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static int c16k_parunmodd(const unsigned char llyth, const int check_fnc1) {
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int modd;
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if (llyth <= 31) {
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modd = check_fnc1 && llyth == '\x1D' ? C128_ABORC : C128_SHIFTA;
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} else if ((llyth >= 48) && (llyth <= 57)) {
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modd = C128_ABORC;
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} else if (llyth <= 95) {
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modd = C128_AORB;
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} else if (llyth <= 127) {
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modd = C128_SHIFTB;
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} else if (llyth <= 159) {
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modd = C128_SHIFTA;
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} else if (llyth <= 223) {
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modd = C128_AORB;
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} else {
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modd = C128_SHIFTB;
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}
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return modd;
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}
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/* Bring together same type blocks (was `c128_grwp()`) */
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static void c16k_grwp(int list[2][C128_MAX], int *p_indexliste) {
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if (*p_indexliste > 1) {
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int i = 1;
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while (i < *p_indexliste) {
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if (list[1][i - 1] == list[1][i]) {
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int j;
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/* Bring together */
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list[0][i - 1] = list[0][i - 1] + list[0][i];
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j = i + 1;
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/* Decrease the list */
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while (j < *p_indexliste) {
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list[0][j - 1] = list[0][j];
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list[1][j - 1] = list[1][j];
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j++;
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}
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*p_indexliste = *p_indexliste - 1;
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i--;
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}
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i++;
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}
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}
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}
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/* Implements rules from ISO/IEC 15417:2007 Annex E (was `c128_dxsmooth()`) */
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static void c16k_dxsmooth(int list[2][C128_MAX], int *p_indexliste) {
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int i, j, nextshift = 0 /*Suppresses gcc -Wmaybe-uninitialized false positive*/, nextshift_i = 0;
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const int indexliste = *p_indexliste;
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for (i = 0; i < indexliste; i++) {
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int current = list[1][i]; /* Either C128_ABORC, C128_AORB, C128_SHIFTA or C128_SHIFTB */
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int length = list[0][i];
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if (i == nextshift_i) {
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nextshift = 0;
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/* Set next shift to aid deciding between latching to A or B - taken from Okapi, props Daniel Gredler */
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for (j = i + 1; j < indexliste; j++) {
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if (list[1][j] == C128_SHIFTA || list[1][j] == C128_SHIFTB) {
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nextshift = list[1][j];
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nextshift_i = j;
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break;
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}
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}
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}
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if (i == 0) { /* first block */
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if (current == C128_ABORC) {
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if ((indexliste == 1) && (length == 2)) {
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/* Rule 1a */
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list[1][i] = C128_LATCHC;
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current = C128_LATCHC;
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} else if (length >= 4) {
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/* Rule 1b */
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list[1][i] = C128_LATCHC;
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current = C128_LATCHC;
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} else {
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current = C128_AORB; /* Determine below */
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}
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}
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if (current == C128_AORB) {
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if (nextshift == C128_SHIFTA) {
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/* Rule 1c */
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list[1][i] = C128_LATCHA;
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} else {
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/* Rule 1d */
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list[1][i] = C128_LATCHB;
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}
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} else if (current == C128_SHIFTA) {
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/* Rule 1c */
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list[1][i] = C128_LATCHA;
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} else if (current == C128_SHIFTB) { /* Unless C128_LATCHX set above, can only be C128_SHIFTB */
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/* Rule 1d */
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list[1][i] = C128_LATCHB;
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}
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} else {
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int last = list[1][i - 1];
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if (current == C128_ABORC) {
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if (length >= 4) {
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/* Rule 3 - note Rule 3b (odd C blocks) dealt with later */
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list[1][i] = C128_LATCHC;
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current = C128_LATCHC;
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} else {
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current = C128_AORB; /* Determine below */
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}
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}
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if (current == C128_AORB) {
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if (last == C128_LATCHA || last == C128_SHIFTB) { /* Maintain state */
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list[1][i] = C128_LATCHA;
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} else if (last == C128_LATCHB || last == C128_SHIFTA) { /* Maintain state */
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list[1][i] = C128_LATCHB;
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} else if (nextshift == C128_SHIFTA) {
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list[1][i] = C128_LATCHA;
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} else {
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list[1][i] = C128_LATCHB;
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}
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} else if (current == C128_SHIFTA) {
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if (length > 1) {
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/* Rule 4 */
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list[1][i] = C128_LATCHA;
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} else if (last == C128_LATCHA || last == C128_SHIFTB) { /* Maintain state */
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list[1][i] = C128_LATCHA;
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} else if (last == C128_LATCHC) {
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list[1][i] = C128_LATCHA;
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}
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} else if (current == C128_SHIFTB) { /* Unless C128_LATCHX set above, can only be C128_SHIFTB */
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if (length > 1) {
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/* Rule 5 */
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list[1][i] = C128_LATCHB;
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} else if (last == C128_LATCHB || last == C128_SHIFTA) { /* Maintain state */
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list[1][i] = C128_LATCHB;
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} else if (last == C128_LATCHC) {
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list[1][i] = C128_LATCHB;
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}
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}
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} /* Rule 2 is implemented elsewhere, Rule 6 is implied */
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}
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c16k_grwp(list, p_indexliste);
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}
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/* Put set data into set[]. Resolves odd C blocks (was `c128_put_in_set()`) */
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static void c16k_put_in_set(int list[2][C128_MAX], const int indexliste, char set[C128_MAX],
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const unsigned char *source) {
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int read = 0;
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int i, j;
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int c_count = 0, have_nonc = 0;
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for (i = 0; i < indexliste; i++) {
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for (j = 0; j < list[0][i]; j++) {
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set[read++] = list[1][i];
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}
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}
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/* Watch out for odd-length Mode C blocks */
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for (i = 0; i < read; i++) {
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if (set[i] == 'C') {
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if (source[i] == '\x1D') {
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if (c_count & 1) {
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have_nonc = 1;
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if (i > c_count) {
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set[i - c_count] = 'B';
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} else {
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set[i - 1] = 'B';
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}
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}
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c_count = 0;
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} else {
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c_count++;
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}
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} else {
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have_nonc = 1;
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if (c_count & 1) {
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if (i > c_count) {
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set[i - c_count] = 'B';
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} else {
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set[i - 1] = 'B';
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}
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}
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c_count = 0;
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}
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}
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if (c_count & 1) {
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if (i > c_count && have_nonc) {
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set[i - c_count] = 'B';
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if (c_count < 4) {
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/* Rule 1b */
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for (j = i - c_count + 1; j < i; j++) {
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set[j] = 'B';
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}
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}
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} else {
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set[i - 1] = 'B';
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}
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}
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for (i = 1; i < read - 1; i++) {
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if (set[i] == 'C' && set[i - 1] != 'C' && set[i + 1] != 'C') {
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set[i] = set[i + 1];
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}
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}
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if (read > 1 && set[read - 1] == 'C' && set[read - 2] != 'C') {
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set[read - 1] = set[read - 2];
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}
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}
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/* Code 16k EN 12323:2005 */
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INTERNAL int code16k(struct zint_symbol *symbol, unsigned char source[], int length) {
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char width_pattern[40]; /* 4 (start) + 1 (guard) + 5*6 (chars) + 4 (stop) + 1 */
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int current_row, rows, looper, first_check, second_check;
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int indexchaine;
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int list[2][C128_MAX] = {{0}};
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char set[C128_MAX] = {0}, fset[C128_MAX] = {0}, mode, current_set;
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int pads_needed, indexliste, i, m, read, mx_reader;
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int extra_pads = 0;
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int values[C128_MAX] = {0};
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int bar_characters;
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int error_number = 0, first_sum, second_sum;
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const int gs1 = (symbol->input_mode & 0x07) == GS1_MODE;
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const int debug_print = symbol->debug & ZINT_DEBUG_PRINT;
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if (length > C128_MAX) {
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return errtxtf(ZINT_ERROR_TOO_LONG, symbol, 420, "Input length %d too long (maximum " C128_MAX_S ")", length);
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}
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if (symbol->option_1 == 1 || symbol->option_1 > 16) {
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return errtxtf(ZINT_ERROR_INVALID_OPTION, symbol, 424, "Minimum number of rows '%d' out of range (2 to 16)",
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symbol->option_1);
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}
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/* Detect extended ASCII characters */
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for (i = 0; i < length; i++) {
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fset[i] = source[i] >= 128 ? 'f' : ' ';
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}
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/* Note to be safe not using extended ASCII latch as not mentioned in BS EN 12323:2005 */
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/* Detect mode A, B and C characters */
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indexliste = 0;
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indexchaine = 0;
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mode = c16k_parunmodd(source[indexchaine], gs1 /*check_fnc1*/);
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do {
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list[1][indexliste] = mode;
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while ((list[1][indexliste] == mode) && (indexchaine < length)) {
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list[0][indexliste]++;
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indexchaine++;
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if (indexchaine == length) {
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break;
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}
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mode = c16k_parunmodd(source[indexchaine], gs1 /*check_fnc1*/);
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}
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indexliste++;
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} while (indexchaine < length);
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c16k_dxsmooth(list, &indexliste);
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/* Put set data into set[], resolving odd C blocks */
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c16k_put_in_set(list, indexliste, set, source);
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if (debug_print) {
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printf("Data: %.*s\n", length, source);
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printf(" Set: %.*s\n", length, set);
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printf("FSet: %.*s\n", length, fset);
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}
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/* start with the mode character - Table 2 */
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m = 0;
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switch (set[0]) {
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case 'A': m = 0;
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break;
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case 'B': m = 1;
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break;
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case 'C': m = 2;
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break;
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}
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if (symbol->output_options & READER_INIT) {
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if (gs1) {
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return errtxt(ZINT_ERROR_INVALID_OPTION, symbol, 422,
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"Cannot use both GS1 mode and Reader Initialisation");
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}
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if (m == 2) {
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m = 5;
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} else if ((set[0] == 'B') && (set[1] == 'C') && fset[0] != 'f') {
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m = 6;
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}
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values[1] = 96; /* FNC3 */
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bar_characters = 2;
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} else {
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if (gs1) {
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/* Integrate FNC1 */
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switch (set[0]) {
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case 'B': m = 3;
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break;
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case 'C': m = 4;
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break;
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}
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} else {
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if ((set[0] == 'B') && (set[1] == 'C')) {
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m = fset[0] == 'f' ? 6 : 5;
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} else if ((set[0] == 'B') && (set[1] == 'B') && (set[2] == 'C') && fset[0] != 'f' && fset[1] != 'f') {
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m = 6;
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}
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}
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bar_characters = 1;
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}
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current_set = set[0];
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read = 0;
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/* Encode the data */
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/* TODO: make use of extra (non-CODE128) shifts: 1SB, 2SA/B/C, 3SB/C */
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do {
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if ((read != 0) && (set[read] != current_set)) {
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/* Latch different code set */
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switch (set[read]) {
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case 'A':
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values[bar_characters++] = 101;
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current_set = 'A';
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break;
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case 'B':
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values[bar_characters++] = 100;
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current_set = 'B';
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break;
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case 'C':
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/* If not Mode C/Shift B and not Mode C/Double Shift B */
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if (!(read == 1 && m >= 5) && !(read == 2 && m == 6)) {
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values[bar_characters++] = 99;
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}
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current_set = 'C';
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break;
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}
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}
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if (fset[read] == 'f') {
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/* Shift extended mode */
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switch (current_set) {
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case 'A':
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values[bar_characters++] = 101; /* FNC 4 */
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break;
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case 'B':
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values[bar_characters++] = 100; /* FNC 4 */
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break;
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}
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}
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if ((set[read] == 'a') || (set[read] == 'b')) {
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/* Insert shift character */
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values[bar_characters++] = 98;
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}
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if (!gs1 || source[read] != '\x1D') {
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switch (set[read]) { /* Encode data characters */
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case 'A':
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case 'a': c128_set_a(source[read], values, &bar_characters);
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read++;
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break;
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case 'B':
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case 'b': (void) c128_set_b(source[read], values, &bar_characters);
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read++;
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break;
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case 'C': c128_set_c(source[read], source[read + 1], values, &bar_characters);
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read += 2;
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break;
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}
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} else {
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values[bar_characters++] = 102;
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read++;
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}
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if (bar_characters > 80 - 2) { /* Max rows 16 * 5 - 2 check chars */
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return errtxtf(ZINT_ERROR_TOO_LONG, symbol, 421,
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"Input too long, requires %d symbol characters (maximum 78)", bar_characters);
|
|
}
|
|
} while (read < length);
|
|
|
|
pads_needed = 5 - ((bar_characters + 2) % 5);
|
|
if (pads_needed == 5) {
|
|
pads_needed = 0;
|
|
}
|
|
if ((bar_characters + pads_needed) < 8) {
|
|
pads_needed += 8 - (bar_characters + pads_needed);
|
|
}
|
|
|
|
rows = (bar_characters + pads_needed + 4) / 5;
|
|
if (symbol->option_1 > rows) {
|
|
extra_pads = (symbol->option_1 - rows) * 5;
|
|
rows = symbol->option_1;
|
|
}
|
|
|
|
for (i = 0; i < pads_needed + extra_pads; i++) {
|
|
values[bar_characters++] = 103;
|
|
}
|
|
values[0] = (7 * (rows - 2)) + m; /* see 4.3.4.2 */
|
|
|
|
/* Calculate check digits */
|
|
first_sum = 0;
|
|
second_sum = 0;
|
|
for (i = 0; i < bar_characters; i++) {
|
|
first_sum += (i + 2) * values[i];
|
|
second_sum += (i + 1) * values[i];
|
|
}
|
|
first_check = first_sum % 107;
|
|
second_sum += first_check * (bar_characters + 1);
|
|
second_check = second_sum % 107;
|
|
values[bar_characters] = first_check;
|
|
values[bar_characters + 1] = second_check;
|
|
bar_characters += 2;
|
|
|
|
if (debug_print) {
|
|
printf("Codewords (%d):", bar_characters);
|
|
for (i = 0; i < bar_characters; i++) {
|
|
if (i % 5 == 0) {
|
|
fputc('\n', stdout);
|
|
}
|
|
printf(" %3d", values[i]);
|
|
}
|
|
fputc('\n', stdout);
|
|
}
|
|
#ifdef ZINT_TEST
|
|
if (symbol->debug & ZINT_DEBUG_TEST) {
|
|
debug_test_codeword_dump_int(symbol, values, bar_characters); /* Missing row start/stop */
|
|
}
|
|
#endif
|
|
|
|
assert(rows * 5 == bar_characters);
|
|
|
|
for (current_row = 0; current_row < rows; current_row++) {
|
|
int writer;
|
|
int flip_flop;
|
|
int len;
|
|
char *d = width_pattern;
|
|
|
|
memcpy(d, C16KStartStop[C16KStartValues[current_row]], 4);
|
|
d += 4;
|
|
*d++ = '1';
|
|
for (i = 0; i < 5; i++, d += 6) {
|
|
memcpy(d, C128Table[values[(current_row * 5) + i]], 6);
|
|
}
|
|
memcpy(d, C16KStartStop[C16KStopValues[current_row]], 4);
|
|
d += 4;
|
|
|
|
/* Write the information into the symbol */
|
|
writer = 0;
|
|
flip_flop = 1;
|
|
for (mx_reader = 0, len = d - width_pattern; mx_reader < len; mx_reader++) {
|
|
for (looper = 0; looper < ctoi(width_pattern[mx_reader]); looper++) {
|
|
if (flip_flop == 1) {
|
|
set_module(symbol, current_row, writer);
|
|
}
|
|
writer++;
|
|
}
|
|
flip_flop = !flip_flop;
|
|
}
|
|
}
|
|
|
|
symbol->rows = rows;
|
|
symbol->width = 70;
|
|
|
|
if (symbol->output_options & COMPLIANT_HEIGHT) {
|
|
/* BS EN 12323:2005 Section 4.5 (d) minimum 8X; use 10X as default
|
|
Section 4.5 (b) H = X[r(h + g) + g] = rows * row_height + (rows - 1) * separator as borders not included
|
|
in symbol->height (added on) */
|
|
const int separator = symbol->option_3 >= 1 && symbol->option_3 <= 4 ? symbol->option_3 : 1;
|
|
const float min_row_height = stripf((8.0f * rows + separator * (rows - 1)) / rows);
|
|
const float default_height = 10.0f * rows + separator * (rows - 1);
|
|
error_number = set_height(symbol, min_row_height, default_height, 0.0f, 0 /*no_errtxt*/);
|
|
} else {
|
|
(void) set_height(symbol, 0.0f, 10.0f * rows, 0.0f, 1 /*no_errtxt*/);
|
|
}
|
|
|
|
symbol->output_options |= BARCODE_BIND;
|
|
|
|
if (symbol->border_width == 0) { /* Allow override if non-zero */
|
|
symbol->border_width = 1; /* BS EN 12323:2005 Section 4.3.7 minimum (note change from previous default 2) */
|
|
}
|
|
|
|
return error_number;
|
|
}
|
|
|
|
/* vim: set ts=4 sw=4 et : */
|