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4a8cac2a5a
PLESSEY: add options NCR weighted mod-10, hide check digit(s) in HRT test suite: now runnable under MSVC 2019, 2017, 2015, MinGW/MSYS win32/README: update with MSVC 2019 and CMake instructions
343 lines
11 KiB
C
343 lines
11 KiB
C
/* plessey.c - Handles Plessey and MSI Plessey */
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/*
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libzint - the open source barcode library
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Copyright (C) 2008 - 2021 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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/* vim: set ts=4 sw=4 et : */
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#include <stdio.h>
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#include "common.h"
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#define SSET "0123456789ABCDEF"
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static const char *PlessTable[16] = {
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"13131313", "31131313", "13311313", "31311313",
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"13133113", "31133113", "13313113", "31313113",
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"13131331", "31131331", "13311331", "31311331",
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"13133131", "31133131", "13313131", "31313131"
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};
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static const char *MSITable[10] = {
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"12121212", "12121221", "12122112", "12122121", "12211212",
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"12211221", "12212112", "12212121", "21121212", "21121221"
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};
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/* Not MSI/Plessey but the older Plessey standard */
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INTERNAL int plessey(struct zint_symbol *symbol, unsigned char source[], int length) {
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int i;
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unsigned char *checkptr;
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static const char grid[9] = {1, 1, 1, 1, 0, 1, 0, 0, 1};
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char dest[554]; /* 8 + 65 * 8 + 8 * 2 + 9 + 1 = 554 */
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int error_number;
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if (length > 65) {
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strcpy(symbol->errtxt, "370: Input too long");
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return ZINT_ERROR_TOO_LONG;
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}
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error_number = is_sane(SSET, source, length);
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if (error_number == ZINT_ERROR_INVALID_DATA) {
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strcpy(symbol->errtxt, "371: Invalid characters in data");
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return error_number;
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}
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checkptr = (unsigned char *) calloc(1, length * 4 + 8);
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/* Start character */
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strcpy(dest, "31311331");
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/* Data area */
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for (i = 0; i < length; i++) {
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unsigned int check = posn(SSET, source[i]);
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lookup(SSET, PlessTable, source[i], dest);
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checkptr[4 * i] = check & 1;
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checkptr[4 * i + 1] = (check >> 1) & 1;
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checkptr[4 * i + 2] = (check >> 2) & 1;
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checkptr[4 * i + 3] = (check >> 3) & 1;
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}
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/* CRC check digit code adapted from code by Leonid A. Broukhis
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used in GNU Barcode */
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for (i = 0; i < (4 * length); i++) {
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if (checkptr[i]) {
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int j;
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for (j = 0; j < 9; j++)
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checkptr[i + j] ^= grid[j];
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}
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}
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for (i = 0; i < 8; i++) {
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switch (checkptr[length * 4 + i]) {
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case 0: strcat(dest, "13");
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break;
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case 1: strcat(dest, "31");
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break;
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}
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}
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/* Stop character */
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strcat(dest, "331311313");
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expand(symbol, dest);
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symbol->text[0] = '\0';
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ustrncat(symbol->text, source, length);
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free(checkptr);
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return error_number;
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}
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/* Modulo 10 check digit - Luhn algorithm
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See https://en.wikipedia.org/wiki/Luhn_algorithm */
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static char msi_check_digit_mod10(const unsigned char source[], const int length) {
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static const int vals[2][10] = {
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{ 0, 2, 4, 6, 8, 1, 3, 5, 7, 9 }, /* Doubled and digits summed */
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{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }, /* Single */
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};
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int i, x = 0, undoubled = 0;
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for (i = length - 1; i >= 0; i--) {
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x += vals[undoubled][ctoi(source[i])];
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if (x > 32767 - 20) {
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x %= 10; /* Prevent overflow */
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}
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undoubled = !undoubled;
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}
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return itoc((10 - x % 10) % 10);
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}
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/* Modulo 11 check digit - IBM weight system wrap = 7, NCR system wrap = 9
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See https://en.wikipedia.org/wiki/MSI_Barcode */
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static char msi_check_digit_mod11(const unsigned char source[], const int length, const int wrap) {
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int i, x = 0, weight = 2;
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for (i = length - 1; i >= 0; i--) {
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x += weight * ctoi(source[i]);
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if (x > 32767 - 200) {
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x %= 11; /* Prevent overflow */
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}
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weight++;
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if (weight > wrap) {
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weight = 2;
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}
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}
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return itoc((11 - x % 11) % 11); /* Will return 'A' for 10 */
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}
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/* Plain MSI Plessey - does not calculate any check character */
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static void msi_plessey(struct zint_symbol *symbol, const unsigned char source[], const int length, char dest[]) {
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int i;
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for (i = 0; i < length; i++) {
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lookup(NEON, MSITable, source[i], dest);
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}
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symbol->text[0] = '\0';
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ustrncat(symbol->text, source, length);
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}
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/* MSI Plessey with Modulo 10 check digit */
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static void msi_plessey_mod10(struct zint_symbol *symbol, const unsigned char source[], const int length,
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const int no_checktext, char dest[]) {
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int i;
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char check_digit;
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/* draw data section */
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for (i = 0; i < length; i++) {
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lookup(NEON, MSITable, source[i], dest);
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}
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/* calculate check digit */
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check_digit = msi_check_digit_mod10(source, length);
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/* draw check digit */
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lookup(NEON, MSITable, check_digit, dest);
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symbol->text[0] = '\0';
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ustrncat(symbol->text, source, length);
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if (!no_checktext) {
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symbol->text[length] = check_digit;
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symbol->text[length + 1] = '\0';
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}
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}
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/* MSI Plessey with two Modulo 10 check digits */
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static void msi_plessey_mod1010(struct zint_symbol *symbol, const unsigned char source[], const int length,
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const int no_checktext, char dest[]) {
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int i;
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unsigned char temp[65 + 2 + 1];
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/* Append check digits */
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temp[0] = '\0';
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ustrncat(temp, source, length);
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temp[length] = msi_check_digit_mod10(source, length);
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temp[length + 1] = msi_check_digit_mod10(temp, length + 1);
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temp[length + 2] = '\0';
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/* draw data section */
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for (i = 0; i < length + 2; i++) {
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lookup(NEON, MSITable, temp[i], dest);
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}
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if (no_checktext) {
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symbol->text[0] = '\0';
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ustrncat(symbol->text, source, length);
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} else {
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ustrcpy(symbol->text, temp);
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}
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}
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/* MSI Plessey with Modulo 11 check digit */
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static void msi_plessey_mod11(struct zint_symbol *symbol, const unsigned char source[], const int length,
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const int no_checktext, const int wrap, char dest[]) {
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/* Uses the IBM weight system if wrap = 7, and the NCR system if wrap = 9 */
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int i;
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char check_digit;
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/* draw data section */
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for (i = 0; i < length; i++) {
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lookup(NEON, MSITable, source[i], dest);
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}
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/* Append check digit */
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check_digit = msi_check_digit_mod11(source, length, wrap);
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if (check_digit == 'A') {
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lookup(NEON, MSITable, '1', dest);
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lookup(NEON, MSITable, '0', dest);
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} else {
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lookup(NEON, MSITable, check_digit, dest);
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}
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symbol->text[0] = '\0';
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ustrncat(symbol->text, source, length);
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if (!no_checktext) {
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if (check_digit == 'A') {
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ustrcat(symbol->text, "10");
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} else {
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symbol->text[length] = check_digit;
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symbol->text[length + 1] = '\0';
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}
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}
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}
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/* MSI Plessey with Modulo 11 check digit and Modulo 10 check digit */
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static void msi_plessey_mod1110(struct zint_symbol *symbol, const unsigned char source[], const int length,
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const int no_checktext, const int wrap, char dest[]) {
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/* Uses the IBM weight system if wrap = 7, and the NCR system if wrap = 9 */
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int i;
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char check_digit;
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unsigned char temp[65 + 3 + 1];
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int temp_len = length;
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temp[0] = '\0';
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ustrncat(temp, source, length);
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/* Append first (mod 11) digit */
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check_digit = msi_check_digit_mod11(source, length, wrap);
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if (check_digit == 'A') {
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temp[temp_len++] = '1';
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temp[temp_len++] = '0';
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} else {
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temp[temp_len++] = check_digit;
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}
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/* Append second (mod 10) check digit */
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temp[temp_len] = msi_check_digit_mod10(temp, temp_len);
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temp[++temp_len] = '\0';
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/* draw data section */
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for (i = 0; i < temp_len; i++) {
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lookup(NEON, MSITable, temp[i], dest);
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}
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if (no_checktext) {
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symbol->text[0] = '\0';
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ustrncat(symbol->text, source, length);
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} else {
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ustrcpy(symbol->text, temp);
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}
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}
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INTERNAL int msi_handle(struct zint_symbol *symbol, unsigned char source[], int length) {
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int error_number;
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char dest[550]; /* 2 + 65 * 8 + 3 * 8 + 3 + 1 = 550 */
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int check_option = symbol->option_2;
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int no_checktext = 0;
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error_number = is_sane(NEON, source, length);
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if (error_number != 0) {
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strcpy(symbol->errtxt, "377: Invalid characters in input data");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (length > 65) {
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strcpy(symbol->errtxt, "372: Input too long");
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return ZINT_ERROR_TOO_LONG;
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}
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if (check_option >= 11 && check_option <= 16) { /* +10 means don't print check digits in HRT */
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check_option -= 10;
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no_checktext = 1;
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}
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if ((check_option < 0) || (check_option > 6)) {
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check_option = 0;
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}
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/* Start character */
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strcpy(dest, "21");
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switch (check_option) {
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case 0: msi_plessey(symbol, source, length, dest);
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break;
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case 1: msi_plessey_mod10(symbol, source, length, no_checktext, dest);
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break;
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case 2: msi_plessey_mod1010(symbol, source, length, no_checktext, dest);
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break;
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case 3: msi_plessey_mod11(symbol, source, length, no_checktext, 7 /*IBM wrap*/, dest);
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break;
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case 4: msi_plessey_mod1110(symbol, source, length, no_checktext, 7 /*IBM wrap*/, dest);
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break;
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case 5: msi_plessey_mod11(symbol, source, length, no_checktext, 9 /*NCR wrap*/, dest);
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break;
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case 6: msi_plessey_mod1110(symbol, source, length, no_checktext, 9 /*NCR wrap*/, dest);
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break;
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}
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/* Stop character */
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strcat(dest, "121");
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expand(symbol, dest);
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return error_number;
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}
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