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316 lines
9.0 KiB
C
316 lines
9.0 KiB
C
/* code49.c - Handles Code 49 */
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/*
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libzint - the open source barcode library
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Copyright (C) 2009 Robin Stuart <robin@zint.org.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 "common.h"
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#include "code49.h"
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#define INSET "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%!&*"
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/* "!" represents Shift 1 and "&" represents Shift 2, "*" represents FNC1 */
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int code_49(struct zint_symbol *symbol, unsigned char source[], int length)
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{
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int i, j, rows, M, x_count, y_count, z_count, posn_val, local_value, h;
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char intermediate[170];
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int codewords[170], codeword_count;
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int c_grid[8][8]; /* Refers to table 3 */
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int w_grid[8][4]; /* Refets to table 2 */
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int pad_count = 0;
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char pattern[40];
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int gs1;
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if(length > 81) {
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strcpy(symbol->errtxt, "Input too long");
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return ERROR_TOO_LONG;
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}
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if(symbol->input_mode == GS1_MODE) { gs1 = 1; } else { gs1 = 0; }
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strcpy(intermediate, gs1 ? "*" : ""); /* FNC1 */
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for(i = 0; i < length; i++) {
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if(source[i] > 127) {
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strcpy(symbol->errtxt, "Invalid characters in input data");
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return ERROR_INVALID_DATA1;
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}
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if(gs1 && (source[i] == '['))
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concat(intermediate, "*"); /* FNC1 */
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else
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concat(intermediate, c49_table7[source[i]]);
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}
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codeword_count = 0;
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i = 0;
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h = strlen(intermediate);
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do {
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if((intermediate[i] >= '0') && (intermediate[i] <= '9')) {
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/* Numeric data */
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for(j = 0; (intermediate[i + j] >= '0') && (intermediate[i + j] <= '9'); j++);
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if(j >= 5) {
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/* Use Numeric Encodation Method */
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int block_count, c;
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int block_remain;
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int block_value;
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codewords[codeword_count] = 48; /* Numeric Shift */
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codeword_count++;
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block_count = j / 5;
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block_remain = j % 5;
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for(c = 0; c < block_count; c++) {
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if((c == block_count - 1) && (block_remain == 2)) {
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/* Rule (d) */
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block_value = 100000;
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block_value += ctoi(intermediate[i]) * 1000;
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block_value += ctoi(intermediate[i + 1]) * 100;
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block_value += ctoi(intermediate[i + 2]) * 10;
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block_value += ctoi(intermediate[i + 3]);
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codewords[codeword_count] = block_value / (48 * 48);
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block_value = block_value - (48 * 48) * codewords[codeword_count];
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codeword_count++;
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codewords[codeword_count] = block_value / 48;
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block_value = block_value - 48 * codewords[codeword_count];
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codeword_count++;
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codewords[codeword_count] = block_value;
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codeword_count++;
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i += 4;
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block_value = ctoi(intermediate[i]) * 100;
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block_value += ctoi(intermediate[i + 1]) * 10;
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block_value += ctoi(intermediate[i + 2]);
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codewords[codeword_count] = block_value / 48;
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block_value = block_value - 48 * codewords[codeword_count];
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codeword_count++;
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codewords[codeword_count] = block_value;
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codeword_count++;
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i += 3;
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} else {
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block_value = ctoi(intermediate[i]) * 10000;
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block_value += ctoi(intermediate[i + 1]) * 1000;
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block_value += ctoi(intermediate[i + 2]) * 100;
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block_value += ctoi(intermediate[i + 3]) * 10;
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block_value += ctoi(intermediate[i + 4]);
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codewords[codeword_count] = block_value / (48 * 48);
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block_value = block_value - (48 * 48) * codewords[codeword_count];
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codeword_count++;
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codewords[codeword_count] = block_value / 48;
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block_value = block_value - 48 * codewords[codeword_count];
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codeword_count++;
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codewords[codeword_count] = block_value;
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codeword_count++;
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i += 5;
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}
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}
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switch(block_remain) {
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case 1:
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/* Rule (a) */
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codewords[codeword_count] = posn(INSET, intermediate[i]);
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codeword_count++;
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i++;
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break;
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case 3:
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/* Rule (b) */
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block_value = ctoi(intermediate[i]) * 100;
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block_value += ctoi(intermediate[i + 1]) * 10;
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block_value += ctoi(intermediate[i + 2]);
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codewords[codeword_count] = block_value / 48;
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block_value = block_value - 48 * codewords[codeword_count];
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codeword_count++;
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codewords[codeword_count] = block_value;
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codeword_count++;
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i += 3;
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break;
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case 4:
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/* Rule (c) */
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block_value = 100000;
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block_value += ctoi(intermediate[i]) * 1000;
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block_value += ctoi(intermediate[i + 1]) * 100;
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block_value += ctoi(intermediate[i + 2]) * 10;
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block_value += ctoi(intermediate[i + 3]);
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codewords[codeword_count] = block_value / (48 * 48);
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block_value = block_value - (48 * 48) * codewords[codeword_count];
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codeword_count++;
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codewords[codeword_count] = block_value / 48;
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block_value = block_value - 48 * codewords[codeword_count];
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codeword_count++;
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codewords[codeword_count] = block_value;
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codeword_count++;
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i += 4;
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break;
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}
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if(i < h) {
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/* There is more to add */
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codewords[codeword_count] = 48; /* Numeric Shift */
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codeword_count++;
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}
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} else {
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codewords[codeword_count] = posn(INSET, intermediate[i]);
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codeword_count++;
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i++;
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}
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} else {
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codewords[codeword_count] = posn(INSET, intermediate[i]);
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codeword_count++;
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i++;
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}
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} while(i < h);
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switch(codewords[0]) { /* Set starting mode value */
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case 48: M = 2; break;
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case 43: M = 4; break;
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case 44: M = 5; break;
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default: M = 0; break;
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}
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if(M != 0) {
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for(i = 0; i < codeword_count; i++) {
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codewords[i] = codewords[i + 1];
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}
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codeword_count--;
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}
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if(codeword_count > 49) {
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strcpy(symbol->errtxt, "Input too long");
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return ERROR_TOO_LONG;
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}
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/* Place codewords in code character array (c grid) */
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rows = 0;
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do{
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for(i = 0; i < 7; i++) {
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if(((rows * 7) + i) < codeword_count) {
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c_grid[rows][i] = codewords[(rows * 7) + i];
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} else {
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c_grid[rows][i] = 48; /* Pad */
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pad_count++;
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}
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}
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rows++;
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} while ((rows * 7) < codeword_count);
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if((((rows <= 6) && (pad_count < 5))) || (rows > 6) || (rows == 1)) {
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/* Add a row */
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for(i = 0; i < 7; i++) {
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c_grid[rows][i] = 48; /* Pad */
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}
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rows++;
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}
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/* Add row count and mode character */
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c_grid[rows - 1][6] = (7 * (rows - 2)) + M;
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/* Add row check character */
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for(i = 0; i < rows - 1; i++) {
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int row_sum = 0;
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for(j = 0; j < 7; j++) {
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row_sum += c_grid[i][j];
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}
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c_grid[i][7] = row_sum % 49;
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}
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/* Calculate Symbol Check Characters */
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posn_val = 0;
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x_count = c_grid[rows - 1][6] * 20;
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y_count = c_grid[rows - 1][6] * 16;
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z_count = c_grid[rows - 1][6] * 38;
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for(i = 0; i < rows - 1; i++) {
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for(j = 0; j < 4; j++) {
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local_value = (c_grid[i][2 * j] * 49) + c_grid[i][(2 * j) + 1];
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x_count += c49_x_weight[posn_val] * local_value;
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y_count += c49_y_weight[posn_val] * local_value;
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z_count += c49_z_weight[posn_val] * local_value;
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posn_val++;
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}
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}
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if(rows > 6) {
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/* Add Z Symbol Check */
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c_grid[rows - 1][0] = (z_count % 2401) / 49;
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c_grid[rows - 1][1] = (z_count % 2401) % 49;
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}
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local_value = (c_grid[rows - 1][0] * 49) + c_grid[rows - 1][1];
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x_count += c49_x_weight[posn_val] * local_value;
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y_count += c49_y_weight[posn_val] * local_value;
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posn_val++;
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/* Add Y Symbol Check */
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c_grid[rows - 1][2] = (y_count % 2401) / 49;
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c_grid[rows - 1][3] = (y_count % 2401) % 49;
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local_value = (c_grid[rows - 1][2] * 49) + c_grid[rows - 1][3];
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x_count += c49_x_weight[posn_val] * local_value;
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/* Add X Symbol Check */
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c_grid[rows - 1][4] = (x_count % 2401) / 49;
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c_grid[rows - 1][5] = (x_count % 2401) % 49;
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/* Add last row check character */
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j = 0;
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for(i = 0; i < 7; i++) {
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j += c_grid[rows - 1][i];
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}
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c_grid[rows - 1][7] = j % 49;
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/* Transfer data to symbol character array (w grid) */
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for(i = 0; i < rows; i++) {
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for(j = 0; j < 4; j ++) {
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w_grid[i][j] = (c_grid[i][2 * j] * 49) + c_grid[i][(2 * j) + 1];
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}
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}
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for(i = 0; i < rows; i++) {
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strcpy(pattern, "11"); /* Start character */
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for(j = 0; j < 4; j++) {
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if(i != (rows - 1)) {
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if(c49_table4[i][j] == 'E') {
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/* Even Parity */
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concat(pattern, c49_appxe_even[w_grid[i][j]]);
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} else {
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/* Odd Parity */
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concat(pattern, c49_appxe_odd[w_grid[i][j]]);
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}
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} else {
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/* Last row uses all even parity */
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concat(pattern, c49_appxe_even[w_grid[i][j]]);
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}
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}
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concat(pattern, "4"); /* Stop character */
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/* Expand into symbol */
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symbol->row_height[i] = 10;
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expand(symbol, pattern);
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}
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symbol->whitespace_width = 10;
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symbol->output_options = BARCODE_BIND;
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symbol->border_width = 2;
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return 0;
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}
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