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First implimentation of Codablock-F
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689
backend/blockf.c
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backend/blockf.c
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/* blockf.c - Codablock F */
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/*
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libzint - the open source barcode library
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Copyright (C) 2008 Robin Stuart <zint@hotmail.co.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "common.h"
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#define TRUE 1
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#define FALSE 0
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#define SHIFTA 90
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#define LATCHA 91
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#define SHIFTB 92
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#define LATCHB 93
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#define SHIFTC 94
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#define LATCHC 95
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#define AORB 96
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#define ABORC 97
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#define CANDB 98
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#define CANDBB 99
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#define MODEA 98
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#define MODEB 100
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#define MODEC 99
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/* Annex A Table A.1 */
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static char *C128Table[107] = {"212222", "222122", "222221", "121223", "121322", "131222", "122213",
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"122312", "132212", "221213", "221312", "231212", "112232", "122132", "122231", "113222",
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"123122", "123221", "223211", "221132", "221231", "213212", "223112", "312131", "311222",
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"321122", "321221", "312212", "322112", "322211", "212123", "212321", "232121", "111323",
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"131123", "131321", "112313", "132113", "132311", "211313", "231113", "231311", "112133",
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"112331", "132131", "113123", "113321", "133121", "313121", "211331", "231131", "213113",
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"213311", "213131", "311123", "311321", "331121", "312113", "312311", "332111", "314111",
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"221411", "431111", "111224", "111422", "121124", "121421", "141122", "141221", "112214",
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"112412", "122114", "122411", "142112", "142211", "241211", "221114", "413111", "241112",
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"134111", "111242", "121142", "121241", "114212", "124112", "124211", "411212", "421112",
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"421211", "212141", "214121", "412121", "111143", "111341", "131141", "114113", "114311",
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"411113", "411311", "113141", "114131", "311141", "411131", "211412", "211214", "211232",
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"2331112"};
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int parunmodd(unsigned char llyth);
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void grwp(int *indexliste);
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void dxsmooth(int *indexliste);
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int a3_convert(unsigned char source) {
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/* Annex A section 3 */
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if(source < 32) { return source + 64; }
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if((source >= 32) && (source <= 127)) { return source - 32; }
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if((source >= 128) && (source <= 159)) { return (source - 128) + 64; }
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if(source >= 160) { return (source - 128) - 32; }
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}
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int character_subset_select(unsigned char source[], int input_position) {
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/* Section 4.5.2 - Determining the Character Subset Selector in a Row */
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if((source[input_position] >= '0') && (source[input_position + 1] <= '9')) {
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/* Rule 1 */
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return MODEC;
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}
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if((source[input_position] >= 128) && (source[input_position] <= 160)) {
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/* Rule 2 (i) */
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return MODEA;
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}
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if((source[input_position] >= 0) && (source[input_position] <= 31)) {
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/* Rule 3 */
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return MODEA;
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}
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/* Rule 4 */
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return MODEB;
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}
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int data_encode_blockf(unsigned char source[], int subset_selector[], int blockmatrix[][62], int *columns_needed, int *rows_needed, int *final_mode)
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{
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int i, j, input_position, input_length, current_mode, current_row, error_number;
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int column_position, c, done, exit_status;
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error_number = 0;
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exit_status = 0;
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current_row = 0;
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current_mode = MODEA;
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input_length = strlen(source);
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column_position = 0;
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input_position = 0;
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done = 0;
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do {
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done = 0;
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/* 'done' ensures that the instructions are followed in the correct order for each input character */
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if(column_position == 0) {
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/* The Beginning of a row */
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c = (*columns_needed);
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current_mode = character_subset_select(source, input_position);
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subset_selector[current_row] = current_mode;
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}
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if(c <= 2) {
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/* Annex B section 1 rule 1 */
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/* Ensure that there is sufficient encodation capacity to continue (using the rules of Annex B.2). */
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switch(current_mode) {
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case MODEA: /* Table B1 applies */
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if(parunmodd(source[input_position]) == ABORC) {
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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done = 1;
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}
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if((parunmodd(source[input_position]) == SHIFTB) && (c == 1)) {
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/* Needs two symbols */
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blockmatrix[current_row][column_position] = 100; /* Code B */
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column_position++;
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c--;
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done = 1;
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}
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if((source[input_position] >= 244) && (done == 0)) {
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/* Needs three symbols */
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blockmatrix[current_row][column_position] = 100; /* Code B */
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column_position++;
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c--;
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if(c == 1) {
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blockmatrix[current_row][column_position] = 101; /* Code A */
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column_position++;
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c--;
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}
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done == 1;
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}
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if((source[input_position] >= 128) && (done == 0)) {
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/* Needs two symbols */
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if(c == 1) {
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blockmatrix[current_row][column_position] = 100; /* Code B */
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column_position++;
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c--;
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done = 1;
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}
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}
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break;
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case MODEB: /* Table B2 applies */
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if(parunmodd(source[input_position]) == ABORC) {
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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done = 1;
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}
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if((parunmodd(source[input_position]) == SHIFTA) && (c == 1)) {
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/* Needs two symbols */
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blockmatrix[current_row][column_position] = 101; /* Code A */
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column_position++;
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c--;
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done = 1;
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}
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if(((source[input_position] >= 128) && (source[input_position] <= 159)) && (done == 0)) {
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/* Needs three symbols */
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blockmatrix[current_row][column_position] = 101; /* Code A */
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column_position++;
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c--;
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if(c == 1) {
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blockmatrix[current_row][column_position] = 100; /* Code B */
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column_position++;
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c--;
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}
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done == 1;
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}
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if((source[input_position] >= 160) && (done == 0)) {
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/* Needs two symbols */
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if(c == 1) {
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blockmatrix[current_row][column_position] = 101; /* Code A */
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column_position++;
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c--;
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done = 1;
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}
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}
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break;
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case MODEC: /* Table B3 applies */
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if((parunmodd(source[input_position]) != ABORC) && (c == 1)) {
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/* Needs two symbols */
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blockmatrix[current_row][column_position] = 101; /* Code A */
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column_position++;
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c--;
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done = 1;
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}
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if(((parunmodd(source[input_position]) == ABORC) && (parunmodd(source[input_position + 1]) != ABORC))
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&& (c == 1)) {
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/* Needs two symbols */
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blockmatrix[current_row][column_position] = 101; /* Code A */
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column_position++;
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c--;
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done = 1;
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}
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if(source[input_position] >= 128) {
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/* Needs three symbols */
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blockmatrix[current_row][column_position] = 101; /* Code A */
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column_position++;
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c--;
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if(c == 1) {
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blockmatrix[current_row][column_position] = 100; /* Code B */
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column_position++;
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c--;
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}
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}
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break;
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}
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}
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if(done == 0) {
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if(((parunmodd(source[input_position]) == AORB) || (parunmodd(source[input_position]) == SHIFTA)) && (current_mode == MODEA)) {
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/* Annex B section 1 rule 2 */
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/* If in Code Subset A and the next data character can be encoded in Subset A encode the next
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character. */
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if(source[input_position] >= 128) {
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/* Extended ASCII character */
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blockmatrix[current_row][column_position] = 101; /* FNC4 */
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column_position++;
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c--;
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}
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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done = 1;
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}
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}
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if(done == 0) {
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if(((parunmodd(source[input_position]) == AORB) || (parunmodd(source[input_position]) == SHIFTB)) && (current_mode == MODEB)) {
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/* Annex B section 1 rule 3 */
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/* If in Code Subset B and the next data character can be encoded in subset B, encode the next
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character. */
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if(source[input_position] >= 128) {
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/* Extended ASCII character */
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blockmatrix[current_row][column_position] = 100; /* FNC4 */
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column_position++;
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c--;
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}
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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done = 1;
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}
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}
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if(done == 0) {
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if(((parunmodd(source[input_position]) == ABORC) && (parunmodd(source[input_position + 1]) == ABORC)) && (current_mode == MODEC)) {
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/* Annex B section 1 rule 4 */
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/* If in Code Subset C and the next data are 2 digits, encode them. */
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blockmatrix[current_row][column_position] = (ctoi(source[input_position]) * 10) + ctoi(source[input_position + 1]);
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column_position++;
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c--;
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input_position += 2;
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done = 1;
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}
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}
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if(done == 0) {
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if(((current_mode == MODEA) || (current_mode == MODEB)) && (parunmodd(source[input_position]) == ABORC)) {
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/* Count the number of numeric digits */
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/* If 4 or more numeric data characters occur together when in subsets A or B:
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a. If there is an even number of numeric data characters, insert a Code C character before the
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first numeric digit to change to subset C.
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b. If there is an odd number of numeric data characters, insert a Code Set C character immedi-
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ately after the first numeric digit to change to subset C. */
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i = 0;
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do { i++; } while(parunmodd(source[input_position + i]) == ABORC);
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i--;
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if(i >= 4) {
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/* Annex B section 1 rule 5 */
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if((i % 2) == 1) {
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/* Annex B section 1 rule 5a */
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blockmatrix[current_row][column_position] = 99; /* Code C */
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column_position++;
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c--;
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blockmatrix[current_row][column_position] = (ctoi(source[input_position]) * 10) + ctoi(source[input_position + 1]);
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column_position++;
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c--;
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input_position += 2;
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current_mode = MODEC;
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} else {
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/* Annex B section 1 rule 5b */
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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}
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done = 1;
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} else {
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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done = 1;
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}
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}
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}
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if(done == 0) {
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if((current_mode == MODEB) && (parunmodd(source[input_position]) == SHIFTA)) {
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/* Annex B section 1 rule 6 */
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/* When in subset B and an ASCII control character occurs in the data:
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a. If there is a lower case character immediately following the control character, insert a Shift
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character before the control character.
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b. Otherwise, insert a Code A character before the control character to change to subset A. */
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if((source[input_position + 1] >= 96) && (source[input_position + 1] <= 127)) {
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/* Annex B section 1 rule 6a */
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blockmatrix[current_row][column_position] = 98; /* Shift */
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column_position++;
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c--;
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if(source[input_position] >= 128) {
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/* Extended ASCII character */
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blockmatrix[current_row][column_position] = 100; /* FNC4 */
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column_position++;
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c--;
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}
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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} else {
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/* Annex B section 1 rule 6b */
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blockmatrix[current_row][column_position] = 101; /* Code A */
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column_position++;
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c--;
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if(source[input_position] >= 128) {
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/* Extended ASCII character */
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blockmatrix[current_row][column_position] = 100; /* FNC4 */
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column_position++;
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c--;
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}
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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current_mode = MODEA;
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}
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done = 1;
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}
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}
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if(done == 0) {
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if((current_mode == MODEA) && (parunmodd(source[input_position]) == SHIFTB)) {
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/* Annex B section 1 rule 7 */
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/* When in subset A and a lower case character occurs in the data:
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a. If following that character, a control character occurs in the data before the occurrence of
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another lower case character, insert a Shift character before the lower case character.
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b. Otherwise, insert a Code B character before the lower case character to change to subset B. */
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if((parunmodd(source[input_position + 1]) == SHIFTA) &&
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(parunmodd(source[input_position + 2]) == SHIFTB)) {
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/* Annex B section 1 rule 7a */
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blockmatrix[current_row][column_position] = 98; /* Shift */
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column_position++;
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c--;
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if(source[input_position] >= 128) {
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/* Extended ASCII character */
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blockmatrix[current_row][column_position] = 101; /* FNC4 */
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column_position++;
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c--;
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}
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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} else {
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/* Annex B section 1 rule 7b */
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blockmatrix[current_row][column_position] = 100; /* Code B */
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column_position++;
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c--;
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if(source[input_position] >= 128) {
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/* Extended ASCII character */
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blockmatrix[current_row][column_position] = 101; /* FNC4 */
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column_position++;
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c--;
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}
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blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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column_position++;
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c--;
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input_position++;
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current_mode = MODEB;
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}
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done = 1;
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}
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}
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if(done == 0) {
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if((current_mode == MODEC) && ((parunmodd(source[input_position]) != ABORC) ||
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(parunmodd(source[input_position + 1]) != ABORC))) {
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/* Annex B section 1 rule 8 */
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/* When in subset C and a non-numeric character (or a single digit) occurs in the data, insert a Code
|
||||
A or Code B character before that character, following rules 8a and 8b to determine between code
|
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subsets A and B.
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a. If an ASCII control character (eg NUL) occurs in the data before any lower case character, use
|
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Code A.
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||||
b. Otherwise use Code B. */
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||||
if(parunmodd(source[input_position]) == SHIFTA) {
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/* Annex B section 1 rule 8a */
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blockmatrix[current_row][column_position] = 101; /* Code A */
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column_position++;
|
||||
c--;
|
||||
if(source[input_position] >= 128) {
|
||||
/* Extended ASCII character */
|
||||
blockmatrix[current_row][column_position] = 101; /* FNC4 */
|
||||
column_position++;
|
||||
c--;
|
||||
}
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||||
blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
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||||
column_position++;
|
||||
c--;
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||||
input_position++;
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||||
current_mode = MODEA;
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||||
} else {
|
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/* Annex B section 1 rule 8b */
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blockmatrix[current_row][column_position] = 100; /* Code B */
|
||||
column_position++;
|
||||
c--;
|
||||
if(source[input_position] >= 128) {
|
||||
/* Extended ASCII character */
|
||||
blockmatrix[current_row][column_position] = 100; /* FNC4 */
|
||||
column_position++;
|
||||
c--;
|
||||
}
|
||||
blockmatrix[current_row][column_position] = a3_convert(source[input_position]);
|
||||
column_position++;
|
||||
c--;
|
||||
input_position++;
|
||||
current_mode = MODEB;
|
||||
}
|
||||
done = 1;
|
||||
}
|
||||
}
|
||||
|
||||
if(input_position == input_length) {
|
||||
/* End of data - Annex B rule 5a */
|
||||
if (c == 1) {
|
||||
if(current_mode == MODEA) {
|
||||
blockmatrix[current_row][column_position] = 100; /* Code B */
|
||||
current_mode = MODEB;
|
||||
} else {
|
||||
blockmatrix[current_row][column_position] = 101; /* Code A */
|
||||
current_mode = MODEA;
|
||||
}
|
||||
column_position++;
|
||||
c--;
|
||||
}
|
||||
|
||||
if (c == 0) {
|
||||
/* Another row is needed */
|
||||
column_position = 0;
|
||||
c = (*columns_needed);
|
||||
current_row++;
|
||||
subset_selector[current_row] = MODEA;
|
||||
current_mode = MODEA;
|
||||
}
|
||||
|
||||
if (c > 2) {
|
||||
/* Fill up the last row */
|
||||
do {
|
||||
if(current_mode == MODEA) {
|
||||
blockmatrix[current_row][column_position] = 100; /* Code B */
|
||||
current_mode = MODEB;
|
||||
} else {
|
||||
blockmatrix[current_row][column_position] = 101; /* Code A */
|
||||
current_mode = MODEA;
|
||||
}
|
||||
column_position++;
|
||||
c--;
|
||||
} while (c > 2);
|
||||
}
|
||||
|
||||
/* If (c == 2) { do nothing } */
|
||||
|
||||
exit_status = 1;
|
||||
*(final_mode) = current_mode;
|
||||
} else {
|
||||
if(c <= 0) {
|
||||
/* Start new row - Annex B rule 5b */
|
||||
column_position = 0;
|
||||
current_row++;
|
||||
if(current_row > 43) {
|
||||
return ERROR_TOO_LONG;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
} while (exit_status == 0);
|
||||
|
||||
*(rows_needed) = current_row + 1;
|
||||
|
||||
return error_number;
|
||||
}
|
||||
|
||||
int codablock(struct zint_symbol *symbol, unsigned char source[])
|
||||
{
|
||||
int error_number, input_length, i, j, k;
|
||||
int rows_needed, columns_needed;
|
||||
int min_module_height;
|
||||
int last_mode, this_mode, final_mode;
|
||||
float estimate_codelength;
|
||||
int blockmatrix[44][62];
|
||||
char row_pattern[750];
|
||||
int subset_selector[44], row_indicator[44], row_check[44];
|
||||
long int k1_sum, k2_sum;
|
||||
int k1_check, k2_check;
|
||||
|
||||
error_number = 0;
|
||||
input_length = strlen(source);
|
||||
final_mode = MODEA;
|
||||
|
||||
if(input_length > 5450) {
|
||||
strcpy(symbol->errtxt, "Input data too long");
|
||||
return ERROR_TOO_LONG;
|
||||
}
|
||||
|
||||
/* Make a guess at how many characters will be needed to encode the data */
|
||||
estimate_codelength = 0.0;
|
||||
last_mode = AORB; /* Codablock always starts with Code A */
|
||||
for(i = 0; i < input_length; i++) {
|
||||
this_mode = parunmodd(source[i]);
|
||||
if(this_mode != last_mode) {
|
||||
estimate_codelength += 1.0;
|
||||
}
|
||||
if(this_mode != ABORC) {
|
||||
estimate_codelength += 1.0;
|
||||
} else {
|
||||
estimate_codelength += 0.5;
|
||||
}
|
||||
if(source[i] > 127) {
|
||||
estimate_codelength += 1.0;
|
||||
}
|
||||
last_mode = this_mode;
|
||||
}
|
||||
|
||||
/* Decide symbol size based on the above guess */
|
||||
rows_needed = 0.5 + sqrt((estimate_codelength + 2) / 1.45);
|
||||
if(rows_needed < 2) { rows_needed = 2; }
|
||||
if(rows_needed > 44) { rows_needed = 44; }
|
||||
columns_needed = (estimate_codelength + 2) / rows_needed;
|
||||
if(columns_needed < 4) { columns_needed = 4; }
|
||||
if(columns_needed > 62) {
|
||||
strcpy(symbol->errtxt, "Input data too long");
|
||||
return ERROR_TOO_LONG;
|
||||
}
|
||||
|
||||
/* Encode the data */
|
||||
error_number = data_encode_blockf(source, subset_selector, blockmatrix, &columns_needed, &rows_needed, &final_mode);
|
||||
if(error_number > 0) {
|
||||
if(error_number == ERROR_TOO_LONG) {
|
||||
strcpy(symbol->errtxt, "Input data too long");
|
||||
}
|
||||
return error_number;
|
||||
}
|
||||
|
||||
/* Add check digits - Annex F */
|
||||
k1_sum = 0;
|
||||
k2_sum = 0;
|
||||
for(i = 0; i < input_length; i++) {
|
||||
k1_sum += (i + 1) * source[i];
|
||||
k2_sum += i * source[i];
|
||||
}
|
||||
k1_check = k1_sum % 86;
|
||||
k2_check = k2_sum % 86;
|
||||
if((final_mode == MODEA) || (final_mode == MODEB)) {
|
||||
k1_check = k1_check + 64;
|
||||
if(k1_check > 95) { k1_check -= 96; }
|
||||
k2_check = k2_check + 64;
|
||||
if(k2_check > 95) { k2_check -= 96; }
|
||||
}
|
||||
blockmatrix[rows_needed - 1][columns_needed - 2] = k1_check;
|
||||
blockmatrix[rows_needed - 1][columns_needed - 1] = k2_check;
|
||||
|
||||
/* Calculate row height (4.6.1.a) */
|
||||
min_module_height = (0.55 * (columns_needed + 3)) + 3;
|
||||
if(min_module_height < 8) { min_module_height = 8; }
|
||||
|
||||
|
||||
/* Encode the Row Indicator in the First Row of the Symbol - Table D2 */
|
||||
if(subset_selector[0] == 99) {
|
||||
/* Code C */
|
||||
row_indicator[0] = rows_needed - 2;
|
||||
} else {
|
||||
/* Code A or B */
|
||||
row_indicator[0] = rows_needed + 62;
|
||||
|
||||
if(row_indicator[0] > 95) {
|
||||
row_indicator[0] -= 95;
|
||||
}
|
||||
}
|
||||
|
||||
/* Encode the Row Indicator in the Second and Subsequent Rows of the Symbol - Table D3 */
|
||||
for(i = 1; i < rows_needed; i++) {
|
||||
/* Note that the second row is row number 1 because counting starts from 0 */
|
||||
if(subset_selector[i] == 99) {
|
||||
/* Code C */
|
||||
row_indicator[i] = i + 42;
|
||||
} else {
|
||||
/* Code A or B */
|
||||
row_indicator[i] = i + 10;
|
||||
}
|
||||
}
|
||||
|
||||
/* Calculate row check digits - Annex E */
|
||||
for(i = 0; i < rows_needed; i++) {
|
||||
k = 103;
|
||||
k += subset_selector[i];
|
||||
k += 2 * row_indicator[i];
|
||||
for(j = 0; j < columns_needed; j++) {
|
||||
k+= (j + 3) * blockmatrix[i][j];
|
||||
}
|
||||
row_check[i] = k % 103;
|
||||
}
|
||||
|
||||
/* Resolve the data into patterns and place in symbol structure */
|
||||
for(i = 0; i < rows_needed; i++) {
|
||||
int writer, flip_flop;
|
||||
|
||||
strcpy(row_pattern, "");
|
||||
/* Start character */
|
||||
concat(row_pattern, C128Table[103]); /* Always Start A */
|
||||
|
||||
concat(row_pattern, C128Table[subset_selector[i]]);
|
||||
concat(row_pattern, C128Table[row_indicator[i]]);
|
||||
|
||||
/*printf("103 %d %d ", subset_selector[i], row_indicator[i]);*/
|
||||
|
||||
for(j = 0; j < columns_needed; j++) {
|
||||
concat(row_pattern, C128Table[blockmatrix[i][j]]);
|
||||
/*printf("%d ",blockmatrix[i][j]);*/
|
||||
}
|
||||
|
||||
concat(row_pattern, C128Table[row_check[i]]);
|
||||
|
||||
/* Stop character */
|
||||
concat(row_pattern, C128Table[106]);
|
||||
/*printf("%d 106\n", row_check[i]);*/
|
||||
|
||||
/* Write the information into the symbol */
|
||||
writer = 0;
|
||||
flip_flop = 1;
|
||||
for (j = 0; j < strlen(row_pattern); j++) {
|
||||
for(k = 0; k < ctoi(row_pattern[j]); k++) {
|
||||
if(flip_flop == 1) {
|
||||
symbol->encoded_data[i][writer] = '1';
|
||||
writer++;
|
||||
} else {
|
||||
symbol->encoded_data[i][writer] = '0';
|
||||
writer++;
|
||||
}
|
||||
}
|
||||
if(flip_flop == 0) { flip_flop = 1; } else { flip_flop = 0; }
|
||||
}
|
||||
symbol->row_height[i] = min_module_height + 2;
|
||||
}
|
||||
|
||||
symbol->border_width = 2;
|
||||
symbol->output_options = BARCODE_BIND;
|
||||
symbol->rows = rows_needed;
|
||||
symbol->width = (11 * (columns_needed + 5)) + 2;
|
||||
|
||||
return error_number;
|
||||
}
|
||||
Loading…
Reference in a new issue