zint/backend/telepen.c

/* telepen.c - Handles Telepen and Telepen numeric */

/*
    libzint - the open source barcode library
    Copyright (C) 2008-2021 Robin Stuart <rstuart114@gmail.com>

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:

    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
    3. Neither the name of the project nor the names of its contributors
       may be used to endorse or promote products derived from this software
       without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    SUCH DAMAGE.
 */
/* vim: set ts=4 sw=4 et : */

/* Telepen Barcode Symbology information and History (BSiH)
   https://telepen.co.uk/wp-content/uploads/2018/10/Barcode-Symbology-information-and-History.pdf */

#define SODIUM  "0123456789X"

#include <stdio.h>
#include "common.h"

static char *TeleTable[] = {
    "31313131", "1131313111", "33313111", "1111313131", "3111313111", "11333131", "13133131", "111111313111",
    "31333111", "1131113131", "33113131", "1111333111", "3111113131", "1113133111", "1311133111", "111111113131",
    "3131113111", "11313331", "333331", "111131113111", "31113331", "1133113111", "1313113111", "1111113331",
    "31131331", "113111113111", "3311113111", "1111131331", "311111113111", "1113111331", "1311111331", "11111111113111",
    "31313311", "1131311131", "33311131", "1111313311", "3111311131", "11333311", "13133311", "111111311131",
    "31331131", "1131113311", "33113311", "1111331131", "3111113311", "1113131131", "1311131131", "111111113311",
    "3131111131", "1131131311", "33131311", "111131111131", "3111131311", "1133111131", "1313111131", "111111131311",
    "3113111311", "113111111131", "3311111131", "111113111311", "311111111131", "111311111311", "131111111311", "11111111111131",
    "3131311111", "11313133", "333133", "111131311111", "31113133", "1133311111", "1313311111", "1111113133",
    "313333", "113111311111", "3311311111", "11113333", "311111311111", "11131333", "13111333", "11111111311111",
    "31311133", "1131331111", "33331111", "1111311133", "3111331111", "11331133", "13131133", "111111331111",
    "3113131111", "1131111133", "33111133", "111113131111", "3111111133", "111311131111", "131111131111", "111111111133",
    "31311313", "113131111111", "3331111111", "1111311313", "311131111111", "11331313", "13131313", "11111131111111",
    "3133111111", "1131111313", "33111313", "111133111111", "3111111313", "111313111111", "131113111111", "111111111313",
    "313111111111", "1131131113", "33131113", "11113111111111", "3111131113", "113311111111", "131311111111", "111111131113",
    "3113111113", "11311111111111", "331111111111", "111113111113", "31111111111111", "111311111113", "131111111113", "1111111111111111",
};

INTERNAL int telepen(struct zint_symbol *symbol, unsigned char source[], int src_len) {
    int i, count, check_digit;
    int error_number;
    char dest[521]; /* 12 (start) + 30 * 16 (max for DELs) + 16 (check digit) + 12 (stop) + 1 = 521 */

    error_number = 0;

    count = 0;

    if (src_len > 30) {
        strcpy(symbol->errtxt, "390: Input too long (30 character maximum)");
        return ZINT_ERROR_TOO_LONG;
    }
    /* Start character */
    strcpy(dest, TeleTable['_']);

    for (i = 0; i < src_len; i++) {
        if (source[i] > 127) {
            /* Cannot encode extended ASCII */
            strcpy(symbol->errtxt, "391: Invalid character in input data, extended ASCII not allowed");
            return ZINT_ERROR_INVALID_DATA;
        }
        strcat(dest, TeleTable[source[i]]);
        count += source[i];
    }

    check_digit = 127 - (count % 127);
    if (check_digit == 127) {
        check_digit = 0;
    }
    strcat(dest, TeleTable[check_digit]);

    if (symbol->debug & ZINT_DEBUG_PRINT) printf("Check digit: %d\n", check_digit);

    /* Stop character */
    strcat(dest, TeleTable['z']);

    expand(symbol, dest);

#ifdef COMPLIANT_HEIGHTS
    /* Default height from various Telepen docs is based on default 26pt at X 0.01125" (average of 0.01" - 0.0125")
       = (26 / 72) / 0.01125 ~ 32; no min height specified */
    (void) set_height(symbol, 0.0f, 32.0f, 0, 1 /*no_errtxt*/);
#else
    (void) set_height(symbol, 0.0f, 50.0f, 0, 1 /*no_errtxt*/);
#endif

    for (i = 0; i < src_len; i++) {
        if (source[i] == '\0') {
            symbol->text[i] = ' ';
        } else {
            symbol->text[i] = source[i];
        }
    }
    symbol->text[src_len] = '\0';
    return error_number;
}

INTERNAL int telepen_num(struct zint_symbol *symbol, unsigned char source[], int src_len) {
    int count, check_digit, glyph;
    int error_number;
    int i;
    char dest[521]; /* 12 (start) + 30 * 16 (max for DELs) + 16 (check digit) + 12 (stop) + 1 = 521 */
    unsigned char temp[64];

    count = 0;

    if (src_len > 60) {
        strcpy(symbol->errtxt, "392: Input too long (60 character maximum)");
        return ZINT_ERROR_TOO_LONG;
    }
    ustrcpy(temp, source);
    to_upper(temp);
    error_number = is_sane(SODIUM, temp, src_len);
    if (error_number == ZINT_ERROR_INVALID_DATA) {
        strcpy(symbol->errtxt, "393: Invalid character in data (digits and \"X\" only)");
        return error_number;
    }

    /* Add a leading zero if required */
    if (src_len & 1) {
        memmove(temp + 1, temp, src_len);
        temp[0] = '0';

        temp[++src_len] = '\0';
    }

    /* Start character */
    strcpy(dest, TeleTable['_']);

    for (i = 0; i < src_len; i += 2) {
        if (temp[i] == 'X') {
            strcpy(symbol->errtxt, "394: Invalid position of X in Telepen data");
            return ZINT_ERROR_INVALID_DATA;
        }

        if (temp[i + 1] == 'X') {
            glyph = ctoi(temp[i]) + 17;
            count += glyph;
        } else {
            glyph = (10 * ctoi(temp[i])) + ctoi(temp[i + 1]);
            glyph += 27;
            count += glyph;
        }
        strcat(dest, TeleTable[glyph]);
    }

    check_digit = 127 - (count % 127);
    if (check_digit == 127) {
        check_digit = 0;
    }
    strcat(dest, TeleTable[check_digit]);

    if (symbol->debug & ZINT_DEBUG_PRINT) printf("Check digit: %d\n", check_digit);

    /* Stop character */
    strcat(dest, TeleTable['z']);

    expand(symbol, dest);

#ifdef COMPLIANT_HEIGHTS
    (void) set_height(symbol, 0.0f, 32.0f, 0, 1 /*no_errtxt*/); /* Same as alphanumeric Telepen */
#else
    (void) set_height(symbol, 0.0f, 50.0f, 0, 1 /*no_errtxt*/);
#endif

    ustrcpy(symbol->text, temp);
    return error_number;
}