mirror of
https://github.com/zint/zint
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6f7cdd660c
for manual Code Set switching via `input_mode` flag `EXTRA_ESCAPE_MODE` (CLI `--extraesc`) (ticket #204) - GUI: disable "Reset" colour if default; add "Unset" to Printing Scale dialog (allows unsetting of X-dim/resolution settings without having to zap) - library: guard against out-of-bounds rows (negative) - test suite: fix some clang-tidy warnings; slight coverage improvements
339 lines
12 KiB
C
339 lines
12 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) 2008-2023 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 using C128Table with extra entry at 106 (Triple Shift) for C16KTable */
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static const char C16KStartStop[8][4] = {
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/* EN 12323 Table 3 and Table 4 - Start patterns and stop patterns */
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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 int 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 int 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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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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strcpy(symbol->errtxt, "420: Input too long");
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return ZINT_ERROR_TOO_LONG;
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}
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if (symbol->option_1 == 1 || symbol->option_1 > 16) {
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strcpy(symbol->errtxt, "424: Minimum number of rows out of range (2 to 16)");
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return ZINT_ERROR_INVALID_OPTION;
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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 = c128_parunmodd(source[indexchaine]);
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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 = c128_parunmodd(source[indexchaine]);
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if ((gs1) && (source[indexchaine] == '[')) {
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mode = C128_ABORC;
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} /* FNC1 */
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}
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indexliste++;
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} while (indexchaine < length);
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c128_dxsmooth(list, &indexliste, NULL /*manual_set*/);
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/* Put set data into set[], resolving odd C blocks */
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c128_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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strcpy(symbol->errtxt, "422: Cannot use both GS1 mode and Reader Initialisation");
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return ZINT_ERROR_INVALID_OPTION;
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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] == '['))) {
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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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strcpy(symbol->errtxt, "421: Input too long");
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return ZINT_ERROR_TOO_LONG;
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}
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} while (read < length);
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pads_needed = 5 - ((bar_characters + 2) % 5);
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if (pads_needed == 5) {
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pads_needed = 0;
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}
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if ((bar_characters + pads_needed) < 8) {
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pads_needed += 8 - (bar_characters + pads_needed);
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}
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rows = (bar_characters + pads_needed + 4) / 5;
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if (symbol->option_1 > rows) {
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extra_pads = (symbol->option_1 - rows) * 5;
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rows = symbol->option_1;
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}
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for (i = 0; i < pads_needed + extra_pads; i++) {
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values[bar_characters++] = 103;
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}
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values[0] = (7 * (rows - 2)) + m; /* see 4.3.4.2 */
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/* Calculate check digits */
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first_sum = 0;
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second_sum = 0;
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for (i = 0; i < bar_characters; i++) {
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first_sum += (i + 2) * values[i];
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second_sum += (i + 1) * values[i];
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}
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first_check = first_sum % 107;
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second_sum += first_check * (bar_characters + 1);
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second_check = second_sum % 107;
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values[bar_characters] = first_check;
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values[bar_characters + 1] = second_check;
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bar_characters += 2;
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if (debug_print) {
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printf("Codewords (%d):", bar_characters);
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for (i = 0; i < bar_characters; i++) {
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if (i % 5 == 0) {
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printf("\n");
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}
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printf(" %3d", values[i]);
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}
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printf("\n");
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}
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#ifdef ZINT_TEST
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if (symbol->debug & ZINT_DEBUG_TEST) {
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debug_test_codeword_dump_int(symbol, values, bar_characters); /* Missing row start/stop */
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}
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#endif
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assert(rows * 5 == bar_characters);
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for (current_row = 0; current_row < rows; current_row++) {
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int writer;
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int flip_flop;
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int len;
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char *d = width_pattern;
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memcpy(d, C16KStartStop[C16KStartValues[current_row]], 4);
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d += 4;
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*d++ = '1';
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for (i = 0; i < 5; i++, d += 6) {
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memcpy(d, C128Table[values[(current_row * 5) + i]], 6);
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}
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memcpy(d, C16KStartStop[C16KStopValues[current_row]], 4);
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d += 4;
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/* Write the information into the symbol */
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writer = 0;
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flip_flop = 1;
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for (mx_reader = 0, len = d - width_pattern; mx_reader < len; mx_reader++) {
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for (looper = 0; looper < ctoi(width_pattern[mx_reader]); looper++) {
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if (flip_flop == 1) {
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set_module(symbol, current_row, writer);
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}
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writer++;
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}
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flip_flop = !flip_flop;
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}
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}
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symbol->rows = rows;
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symbol->width = 70;
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if (symbol->output_options & COMPLIANT_HEIGHT) {
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/* BS EN 12323:2005 Section 4.5 (d) minimum 8X; use 10X as default
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Section 4.5 (b) H = X[r(h + g) + g] = rows * row_height + (rows - 1) * separator as borders not included
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in symbol->height (added on) */
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const int separator = symbol->option_3 >= 1 && symbol->option_3 <= 4 ? symbol->option_3 : 1;
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const float min_row_height = stripf((8.0f * rows + separator * (rows - 1)) / rows);
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const float default_height = 10.0f * rows + separator * (rows - 1);
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error_number = set_height(symbol, min_row_height, default_height, 0.0f, 0 /*no_errtxt*/);
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} else {
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(void) set_height(symbol, 0.0f, 10.0f * rows, 0.0f, 1 /*no_errtxt*/);
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}
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symbol->output_options |= BARCODE_BIND;
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if (symbol->border_width == 0) { /* Allow override if non-zero */
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symbol->border_width = 1; /* BS EN 12323:2005 Section 4.3.7 minimum (note change from previous default 2) */
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}
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return error_number;
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}
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/* vim: set ts=4 sw=4 et : */
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