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Update zint
This commit is contained in:
Rodrigo Torres
358
3rdparty/zint-2.6.1/backend/gs1.c
vendored
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358
3rdparty/zint-2.6.1/backend/gs1.c
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/* gs1.c - Verifies GS1 data */
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/*
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libzint - the open source barcode library
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Copyright (C) 2009-2017 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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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef _MSC_VER
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#include <malloc.h>
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#endif
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#include "common.h"
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#include "gs1.h"
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/* This code does some checks on the integrity of GS1 data. It is not intended
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to be bulletproof, nor does it report very accurately what problem was found
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or where, but should prevent some of the more common encoding errors */
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void itostr(char ai_string[], int ai_value) {
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int thou, hund, ten, unit;
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char temp[2];
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strcpy(ai_string, "(");
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thou = ai_value / 1000;
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hund = (ai_value - (1000 * thou)) / 100;
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ten = (ai_value - ((1000 * thou) + (100 * hund))) / 10;
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unit = ai_value - ((1000 * thou) + (100 * hund) + (10 * ten));
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temp[1] = '\0';
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if (ai_value >= 1000) {
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temp[0] = itoc(thou);
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strcat(ai_string, temp);
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}
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if (ai_value >= 100) {
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temp[0] = itoc(hund);
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strcat(ai_string, temp);
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}
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temp[0] = itoc(ten);
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strcat(ai_string, temp);
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temp[0] = itoc(unit);
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strcat(ai_string, temp);
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strcat(ai_string, ")");
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}
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int gs1_verify(struct zint_symbol *symbol, const unsigned char source[], const size_t src_len, char reduced[]) {
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int i, j, last_ai, ai_latch;
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char ai_string[6];
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int bracket_level, max_bracket_level, ai_length, max_ai_length, min_ai_length;
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int ai_value[100], ai_location[100], ai_count, data_location[100], data_length[100];
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int error_latch;
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/* Detect extended ASCII characters */
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for (i = 0; i < src_len; i++) {
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if (source[i] >= 128) {
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strcpy(symbol->errtxt, "250: Extended ASCII characters are not supported by GS1");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (source[i] < 32) {
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strcpy(symbol->errtxt, "251: Control characters are not supported by GS1 ");
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return ZINT_ERROR_INVALID_DATA;
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}
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}
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if (source[0] != '[') {
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strcpy(symbol->errtxt, "252: Data does not start with an AI");
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return ZINT_ERROR_INVALID_DATA;
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}
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/* Check the position of the brackets */
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bracket_level = 0;
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max_bracket_level = 0;
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ai_length = 0;
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max_ai_length = 0;
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min_ai_length = 5;
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j = 0;
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ai_latch = 0;
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for (i = 0; i < src_len; i++) {
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ai_length += j;
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if (((j == 1) && (source[i] != ']')) && ((source[i] < '0') || (source[i] > '9'))) {
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ai_latch = 1;
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}
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if (source[i] == '[') {
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bracket_level++;
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j = 1;
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}
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if (source[i] == ']') {
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bracket_level--;
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if (ai_length < min_ai_length) {
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min_ai_length = ai_length;
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}
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j = 0;
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ai_length = 0;
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}
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if (bracket_level > max_bracket_level) {
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max_bracket_level = bracket_level;
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}
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if (ai_length > max_ai_length) {
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max_ai_length = ai_length;
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}
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}
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min_ai_length--;
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if (bracket_level != 0) {
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/* Not all brackets are closed */
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strcpy(symbol->errtxt, "253: Malformed AI in input data (brackets don\'t match)");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (max_bracket_level > 1) {
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/* Nested brackets */
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strcpy(symbol->errtxt, "254: Found nested brackets in input data");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (max_ai_length > 4) {
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/* AI is too long */
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strcpy(symbol->errtxt, "255: Invalid AI in input data (AI too long)");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (min_ai_length <= 1) {
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/* AI is too short */
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strcpy(symbol->errtxt, "256: Invalid AI in input data (AI too short)");
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return ZINT_ERROR_INVALID_DATA;
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}
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if (ai_latch == 1) {
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/* Non-numeric data in AI */
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strcpy(symbol->errtxt, "257: Invalid AI in input data (non-numeric characters in AI)");
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return ZINT_ERROR_INVALID_DATA;
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}
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ai_count = 0;
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for (i = 1; i < src_len; i++) {
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if (source[i - 1] == '[') {
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ai_location[ai_count] = i;
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j = 0;
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do {
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ai_string[j] = source[i + j];
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j++;
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} while (ai_string[j - 1] != ']');
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ai_string[j - 1] = '\0';
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ai_value[ai_count] = atoi(ai_string);
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ai_count++;
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}
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}
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for (i = 0; i < ai_count; i++) {
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data_location[i] = ai_location[i] + 3;
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if (ai_value[i] >= 100) {
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data_location[i]++;
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}
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if (ai_value[i] >= 1000) {
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data_location[i]++;
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}
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data_length[i] = 0;
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do {
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data_length[i]++;
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} while ((source[data_location[i] + data_length[i] - 1] != '[') && (data_location[i] + data_length[i] <= src_len));
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data_length[i]--;
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}
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for (i = 0; i < ai_count; i++) {
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if (data_length[i] == 0) {
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/* No data for given AI */
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strcpy(symbol->errtxt, "258: Empty data field in input data");
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return ZINT_ERROR_INVALID_DATA;
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}
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}
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error_latch = 0;
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strcpy(ai_string, "");
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for (i = 0; i < ai_count; i++) {
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switch (ai_value[i]) {
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case 0: if (data_length[i] != 18) {
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error_latch = 1;
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}
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break;
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case 1:
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case 2:
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case 3: if (data_length[i] != 14) {
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error_latch = 1;
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}
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break;
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case 4: if (data_length[i] != 16) {
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error_latch = 1;
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}
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break;
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case 11:
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case 12:
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case 13:
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case 14:
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case 15:
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case 16:
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case 17:
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case 18:
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case 19: if (data_length[i] != 6) {
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error_latch = 1;
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}
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break;
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case 20: if (data_length[i] != 2) {
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error_latch = 1;
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}
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break;
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case 23:
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case 24:
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case 25:
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case 39:
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case 40:
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case 41:
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case 42:
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case 70:
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case 80:
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case 81: error_latch = 2;
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break;
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}
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if (
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((ai_value[i] >= 100) && (ai_value[i] <= 179))
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|| ((ai_value[i] >= 1000) && (ai_value[i] <= 1799))
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|| ((ai_value[i] >= 200) && (ai_value[i] <= 229))
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|| ((ai_value[i] >= 2000) && (ai_value[i] <= 2299))
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|| ((ai_value[i] >= 300) && (ai_value[i] <= 309))
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|| ((ai_value[i] >= 3000) && (ai_value[i] <= 3099))
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|| ((ai_value[i] >= 31) && (ai_value[i] <= 36))
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|| ((ai_value[i] >= 310) && (ai_value[i] <= 369))
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) {
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error_latch = 2;
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}
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if ((ai_value[i] >= 3100) && (ai_value[i] <= 3699)) {
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if (data_length[i] != 6) {
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error_latch = 1;
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}
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}
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if (
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((ai_value[i] >= 370) && (ai_value[i] <= 379))
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|| ((ai_value[i] >= 3700) && (ai_value[i] <= 3799))
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) {
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error_latch = 2;
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}
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if ((ai_value[i] >= 410) && (ai_value[i] <= 415)) {
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if (data_length[i] != 13) {
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error_latch = 1;
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}
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}
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if (
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((ai_value[i] >= 4100) && (ai_value[i] <= 4199))
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|| ((ai_value[i] >= 700) && (ai_value[i] <= 703))
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|| ((ai_value[i] >= 800) && (ai_value[i] <= 810))
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|| ((ai_value[i] >= 900) && (ai_value[i] <= 999))
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|| ((ai_value[i] >= 9000) && (ai_value[i] <= 9999))
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) {
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error_latch = 2;
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}
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if ((error_latch < 4) && (error_latch > 0)) {
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/* error has just been detected: capture AI */
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itostr(ai_string, ai_value[i]);
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error_latch += 4;
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}
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}
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if (error_latch == 5) {
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strcpy(symbol->errtxt, "259: Invalid data length for AI ");
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strcat(symbol->errtxt, ai_string);
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return ZINT_ERROR_INVALID_DATA;
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}
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if (error_latch == 6) {
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strcpy(symbol->errtxt, "260: Invalid AI value");
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strcat(symbol->errtxt, ai_string);
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return ZINT_ERROR_INVALID_DATA;
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}
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/* Resolve AI data - put resulting string in 'reduced' */
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j = 0;
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last_ai = 0;
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ai_latch = 1;
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for (i = 0; i < src_len; i++) {
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if ((source[i] != '[') && (source[i] != ']')) {
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reduced[j++] = source[i];
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}
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if (source[i] == '[') {
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/* Start of an AI string */
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if (ai_latch == 0) {
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reduced[j++] = '[';
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}
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ai_string[0] = source[i + 1];
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ai_string[1] = source[i + 2];
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ai_string[2] = '\0';
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last_ai = atoi(ai_string);
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ai_latch = 0;
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/* The following values from "GS-1 General Specification version 8.0 issue 2, May 2008"
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figure 5.4.8.2.1 - 1 "Element Strings with Pre-Defined Length Using Application Identifiers" */
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if (
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((last_ai >= 0) && (last_ai <= 4))
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|| ((last_ai >= 11) && (last_ai <= 20))
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|| (last_ai == 23) /* legacy support - see 5.3.8.2.2 */
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|| ((last_ai >= 31) && (last_ai <= 36))
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|| (last_ai == 41)
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) {
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ai_latch = 1;
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}
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}
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/* The ']' character is simply dropped from the input */
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}
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reduced[j] = '\0';
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/* the character '[' in the reduced string refers to the FNC1 character */
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return 0;
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}
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int ugs1_verify(struct zint_symbol *symbol, const unsigned char source[], const unsigned int src_len, unsigned char reduced[]) {
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/* Only to keep the compiler happy */
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#ifndef _MSC_VER
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char temp[src_len + 5];
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#else
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char* temp = (char*) _alloca(src_len + 5);
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#endif
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int error_number;
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error_number = gs1_verify(symbol, source, src_len, temp);
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if (error_number != 0) {
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return error_number;
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}
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if (strlen(temp) < src_len + 5) {
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ustrcpy(reduced, (unsigned char*) temp);
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return 0;
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}
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strcpy(symbol->errtxt, "261: ugs1_verify overflow");
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return ZINT_ERROR_INVALID_DATA;
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}
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