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309 lines
8.4 KiB
C
309 lines
8.4 KiB
C
/* medical.c - Handles 1 track and 2 track pharmacode and Codabar */
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/*
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libzint - the open source barcode library
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Copyright (C) 2008 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 <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "common.h"
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extern int c39(struct zint_symbol *symbol, unsigned char source[], int length);
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/* Codabar table checked against EN 798:1995 */
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#define CALCIUM "0123456789-$:/.+ABCD"
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static char *CodaTable[20] = {"11111221", "11112211", "11121121", "22111111", "11211211", "21111211",
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"12111121", "12112111", "12211111", "21121111", "11122111", "11221111", "21112121", "21211121",
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"21212111", "11212121", "11221211", "12121121", "11121221", "11122211"};
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int pharma_one(struct zint_symbol *symbol, unsigned char source[], int length)
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{
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/* "Pharmacode can represent only a single integer from 3 to 131070. Unlike other
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commonly used one-dimensional barcode schemes, pharmacode does not store the data in a
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form corresponding to the human-readable digits; the number is encoded in binary, rather
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than decimal. Pharmacode is read from right to left: with n as the bar position starting
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at 0 on the right, each narrow bar adds 2n to the value and each wide bar adds 2(2^n).
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The minimum barcode is 2 bars and the maximum 16, so the smallest number that could
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be encoded is 3 (2 narrow bars) and the biggest is 131070 (16 wide bars)."
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- http://en.wikipedia.org/wiki/Pharmacode */
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/* This code uses the One Track Pharamacode calculating algorithm as recommended by
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the specification at http://www.laetus.com/laetus.php?request=file&id=69 */
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unsigned long int tester;
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int counter, error_number, h;
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char inter[18] = { 0 }; /* 131070 -> 17 bits */
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char dest[64]; /* 17 * 2 + 1 */
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error_number = 0;
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if(length > 6) {
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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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error_number = is_sane(NEON, source, length);
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if(error_number == ERROR_INVALID_DATA1) {
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strcpy(symbol->errtxt, "Invalid characters in data");
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return error_number;
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}
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tester = atoi((char*)source);
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if((tester < 3) || (tester > 131070)) {
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strcpy(symbol->errtxt, "Data out of range");
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return ERROR_INVALID_DATA1;
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}
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do
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{
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if(!(tester & 1)) {
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concat(inter, "W");
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tester = (tester - 2) / 2;
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} else {
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concat(inter, "N");
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tester = (tester - 1) / 2;
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}
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}
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while(tester != 0);
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h = strlen(inter) - 1;
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*dest = '\0';
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for(counter = h; counter >= 0; counter--) {
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if(inter[counter] == 'W') {
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concat(dest, "32");
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} else {
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concat(dest, "12");
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}
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}
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expand(symbol, dest);
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return error_number;
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}
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int pharma_two_calc(struct zint_symbol *symbol, unsigned char source[], char dest[])
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{
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/* This code uses the Two Track Pharamacode defined in the document at
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http://www.laetus.com/laetus.php?request=file&id=69 and using a modified
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algorithm from the One Track system. This standard accepts integet values
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from 4 to 64570080. */
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unsigned long int tester;
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int counter, h;
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char inter[17];
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int error_number;
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tester = atoi((char*)source);
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if((tester < 4) || (tester > 64570080))
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{
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strcpy(symbol->errtxt, "Data out of range");
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return ERROR_INVALID_DATA1;
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}
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error_number = 0;
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strcpy(inter, "");
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do
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{
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switch(tester%3) {
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case 0:
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concat(inter, "3");
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tester = (tester - 3) / 3;
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break;
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case 1:
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concat(inter, "1");
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tester = (tester - 1) / 3;
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break;
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case 2:
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concat(inter, "2");
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tester = (tester - 2) / 3;
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break;
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}
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}
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while(tester != 0);
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h = strlen(inter) - 1;
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for(counter = h; counter >= 0; counter--)
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{
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dest[h - counter] = inter[counter];
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}
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dest[h + 1] = '\0';
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return error_number;
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}
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int pharma_two(struct zint_symbol *symbol, unsigned char source[], int length)
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{
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/* Draws the patterns for two track pharmacode */
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char height_pattern[200];
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unsigned int loopey, h;
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int writer;
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int error_number = 0;
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strcpy(height_pattern, "");
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if(length > 8) {
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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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error_number = is_sane(NEON, source, length);
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if(error_number == ERROR_INVALID_DATA1) {
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strcpy(symbol->errtxt, "Invalid characters in data");
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return error_number;
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}
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error_number = pharma_two_calc(symbol, source, height_pattern);
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if(error_number != 0) {
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return error_number;
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}
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writer = 0;
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h = strlen(height_pattern);
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for(loopey = 0; loopey < h; loopey++)
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{
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if((height_pattern[loopey] == '2') || (height_pattern[loopey] == '3'))
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{
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set_module(symbol, 0, writer);
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}
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if((height_pattern[loopey] == '1') || (height_pattern[loopey] == '3'))
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{
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set_module(symbol, 1, writer);
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}
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writer += 2;
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}
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symbol->rows = 2;
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symbol->width = writer - 1;
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return error_number;
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}
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int codabar(struct zint_symbol *symbol, unsigned char source[], int length)
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{ /* The Codabar system consisting of simple substitution */
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int i, error_number;
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char dest[512];
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error_number = 0;
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strcpy(dest, "");
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if(length > 60) { /* No stack smashing please */
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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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to_upper(source);
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error_number = is_sane(CALCIUM, source, length);
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if(error_number == ERROR_INVALID_DATA1) {
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strcpy(symbol->errtxt, "Invalid characters in data");
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return error_number;
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}
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/* Codabar must begin and end with the characters A, B, C or D */
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if((source[0] != 'A') && (source[0] != 'B') && (source[0] != 'C') && (source[0] != 'D'))
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{
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strcpy(symbol->errtxt, "Invalid characters in data");
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return ERROR_INVALID_DATA1;
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}
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if((source[length - 1] != 'A') && (source[length - 1] != 'B') &&
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(source[length - 1] != 'C') && (source[length - 1] != 'D'))
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{
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strcpy(symbol->errtxt, "Invalid characters in data");
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return ERROR_INVALID_DATA1;
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}
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for(i = 0; i < length; i++)
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{
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lookup(CALCIUM, CodaTable, source[i], dest);
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}
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expand(symbol, dest);
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ustrcpy(symbol->text, source);
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return error_number;
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}
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int code32(struct zint_symbol *symbol, unsigned char source[], int length)
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{ /* Italian Pharmacode */
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int i, zeroes, error_number, checksum, checkpart, checkdigit;
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char localstr[10], risultante[7];
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long int pharmacode, remainder, devisor;
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int codeword[6];
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char tabella[34];
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/* Validate the input */
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if(length > 8) {
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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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error_number = is_sane(NEON, source, length);
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if(error_number == ERROR_INVALID_DATA1) {
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strcpy(symbol->errtxt, "Invalid characters in data");
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return error_number;
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}
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/* Add leading zeros as required */
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zeroes = 8 - length;
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memset(localstr, '0', zeroes);
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strcpy(localstr + zeroes, (char*)source);
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/* Calculate the check digit */
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checksum = 0;
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checkpart = 0;
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for(i = 0; i < 4; i++) {
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checkpart = ctoi(localstr[i * 2]);
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checksum += checkpart;
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checkpart = 2 * (ctoi(localstr[(i * 2) + 1]));
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if(checkpart >= 10) {
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checksum += (checkpart - 10) + 1;
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} else {
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checksum += checkpart;
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}
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}
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/* Add check digit to data string */
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checkdigit = checksum % 10;
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localstr[8] = itoc(checkdigit);
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localstr[9] = '\0';
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/* Convert string into an integer value */
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pharmacode = atoi(localstr);
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/* Convert from decimal to base-32 */
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devisor = 33554432;
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for(i = 5; i >= 0; i--) {
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codeword[i] = pharmacode / devisor;
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remainder = pharmacode % devisor;
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pharmacode = remainder;
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devisor /= 32;
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}
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/* Look up values in 'Tabella di conversione' */
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strcpy(tabella, "0123456789BCDFGHJKLMNPQRSTUVWXYZ");
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for(i = 5; i >= 0; i--) {
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risultante[5 - i] = tabella[codeword[i]];
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}
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risultante[6] = '\0';
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/* Plot the barcode using Code 39 */
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error_number = c39(symbol, (unsigned char*)risultante, strlen(risultante));
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if(error_number != 0) { return error_number; }
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/* Override the normal text output with the Pharmacode number */
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ustrcpy(symbol->text, (unsigned char*)"A");
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uconcat(symbol->text, (unsigned char*)localstr);
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return error_number;
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}
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