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373 lines
14 KiB
C
373 lines
14 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 - 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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#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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INTERNAL int code_49(struct zint_symbol *symbol, unsigned char source[], int length) {
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int i, j, rows, M, x_count, y_count, z_count, posn_val, local_value;
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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[80];
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int gs1;
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int h, len;
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int separator;
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float min_row_height = 0.0f;
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int error_number = 0;
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if (length > 81) {
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strcpy(symbol->errtxt, "430: Input too long (81 character maximum)");
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return ZINT_ERROR_TOO_LONG;
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}
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if ((symbol->input_mode & 0x07) == GS1_MODE) {
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gs1 = 1;
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strcpy(intermediate, "*"); /* FNC1 */
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} else {
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gs1 = 0;
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}
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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, "431: Invalid character in input data, extended ASCII not allowed");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (gs1 && (source[i] == '['))
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strcat(intermediate, "*"); /* FNC1 */
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else
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strcat(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 = (int) 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]) {
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/* Set starting mode value */
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case 48: M = 2;
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break;
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case 43: M = 4;
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break;
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case 44: M = 5;
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break;
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default: M = 0;
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break;
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}
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if (M != 0) {
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codeword_count--;
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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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}
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if (codeword_count > 49) {
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strcpy(symbol->errtxt, "432: Input too long");
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return ZINT_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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if (symbol->debug & ZINT_DEBUG_PRINT) {
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printf("Codewords:\n");
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for (i = 0; i < rows; i++) {
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for (j = 0; j < 8; j++) {
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printf(" %2d", c_grid[i][j]);
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}
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printf("\n");
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}
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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, (int *)c_grid, rows * 8);
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}
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#endif
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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, "10"); /* 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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bin_append(c49_even_bitpattern[w_grid[i][j]], 16, pattern);
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} else {
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/* Odd Parity */
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bin_append(c49_odd_bitpattern[w_grid[i][j]], 16, pattern);
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}
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} else {
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/* Last row uses all even parity */
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bin_append(c49_even_bitpattern[w_grid[i][j]], 16, pattern);
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}
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}
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strcat(pattern, "1111"); /* Stop character */
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/* Expand into symbol */
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for (j = 0, len = (int) strlen(pattern); j < len; j++) {
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if (pattern[j] == '1') {
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set_module(symbol, i, j);
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}
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}
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}
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symbol->rows = rows;
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symbol->width = (int) strlen(pattern);
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#ifdef COMPLIANT_HEIGHTS
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separator = symbol->option_3 >= 1 && symbol->option_3 <= 4 ? symbol->option_3 : 1;
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/* ANSI/AIM BC6-2000 Section 2.6 minimum 8X; use 10 * rows as default for back-compatibility */
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min_row_height = 8.0f + separator;
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error_number = set_height(symbol, min_row_height, (min_row_height > 10.0f ? min_row_height : 10.0f) * rows, 0.0f,
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0 /*no_errtxt*/);
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#else
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(void)&separator;
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(void) set_height(symbol, min_row_height, 10.0f * rows, 0.0f, 1 /*no_errtxt*/);
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#endif
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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; /* ANSI/AIM BC6-2000 Section 2.1 (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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