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375 lines
10 KiB
C
375 lines
10 KiB
C
/* common.c - Contains functions needed for a number of barcodes */
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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 <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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int ustrlen(unsigned char data[]) {
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/* Local replacement for strlen() with unsigned char strings */
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int i;
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for (i=0;data[i];i++);
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return i;
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}
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void ustrcpy(unsigned char target[], unsigned char source[]) {
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/* Local replacement for strcpy() with unsigned char strings */
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int i, len;
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len = ustrlen(source);
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for(i = 0; i < len; i++) {
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target[i] = source[i];
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}
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target[i] = '\0';
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}
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void concat(char dest[], char source[])
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{ /* Concatinates dest[] with the contents of source[], copying /0 as well */
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unsigned int i, j, n;
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j = strlen(dest);
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n = strlen(source);
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for(i = 0; i <= n; i++) {
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dest[i + j] = source[i]; }
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}
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void uconcat(unsigned char dest[], unsigned char source[])
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{ /* Concatinates dest[] with the contents of source[], copying /0 as well */
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unsigned int i, j;
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j = ustrlen(dest);
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for(i = 0; i <= ustrlen(source); i++) {
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dest[i + j] = source[i]; }
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}
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int ctoi(char source)
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{ /* Converts a character 0-9 to its equivalent integer value */
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if((source >= '0') && (source <= '9'))
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return (source - '0');
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return(source - 'A' + 10);
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}
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char itoc(int source)
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{ /* Converts an integer value to its hexadecimal character */
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if ((source >= 0) && (source <= 9)) {
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return ('0' + source); }
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else {
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return ('A' + (source - 10)); }
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}
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void to_upper(unsigned char source[])
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{ /* Converts lower case characters to upper case in a string source[] */
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unsigned int i, src_len = ustrlen(source);
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for (i = 0; i < src_len; i++) {
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if ((source[i] >= 'a') && (source[i] <= 'z')) {
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source [i] = (source[i] - 'a') + 'A'; }
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}
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}
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int is_sane(char test_string[], unsigned char source[], int length)
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{ /* Verifies that a string only uses valid characters */
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unsigned int i, j, latch;
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unsigned int lt = strlen(test_string);
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for(i = 0; i < length; i++) {
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latch = FALSE;
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for(j = 0; j < lt; j++) {
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if (source[i] == test_string[j]) {
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latch = TRUE;
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break;
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}
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}
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if (!(latch)) {
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return ERROR_INVALID_DATA1;
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}
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}
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return 0;
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}
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int posn(char set_string[], char data)
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{ /* Returns the position of data in set_string */
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unsigned int i, n = strlen(set_string);
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for(i = 0; i < n; i++) {
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if (data == set_string[i]) { return i; } }
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return 0;
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}
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void lookup(char set_string[], char *table[], char data, char dest[])
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{ /* Replaces huge switch statements for looking up in tables */
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unsigned int i, n = strlen(set_string);
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for(i = 0; i < n; i++) {
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if (data == set_string[i]) { concat(dest, table[i]); } }
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}
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int module_is_set(struct zint_symbol *symbol, int y_coord, int x_coord)
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{
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return (symbol->encoded_data[y_coord][x_coord / 7] >> (x_coord % 7)) & 1;
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#if 0
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switch(x_sub) {
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case 0: if((symbol->encoded_data[y_coord][x_char] & 0x01) != 0) { result = 1; } break;
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case 1: if((symbol->encoded_data[y_coord][x_char] & 0x02) != 0) { result = 1; } break;
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case 2: if((symbol->encoded_data[y_coord][x_char] & 0x04) != 0) { result = 1; } break;
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case 3: if((symbol->encoded_data[y_coord][x_char] & 0x08) != 0) { result = 1; } break;
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case 4: if((symbol->encoded_data[y_coord][x_char] & 0x10) != 0) { result = 1; } break;
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case 5: if((symbol->encoded_data[y_coord][x_char] & 0x20) != 0) { result = 1; } break;
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case 6: if((symbol->encoded_data[y_coord][x_char] & 0x40) != 0) { result = 1; } break;
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}
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return result;
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#endif
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}
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void set_module(struct zint_symbol *symbol, int y_coord, int x_coord)
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{
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symbol->encoded_data[y_coord][x_coord / 7] |= 1 << (x_coord % 7);
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#if 0
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int x_char, x_sub;
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x_char = x_coord / 7;
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x_sub = x_coord % 7;
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switch(x_sub) {
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case 0: symbol->encoded_data[y_coord][x_char] += 0x01; break;
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case 1: symbol->encoded_data[y_coord][x_char] += 0x02; break;
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case 2: symbol->encoded_data[y_coord][x_char] += 0x04; break;
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case 3: symbol->encoded_data[y_coord][x_char] += 0x08; break;
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case 4: symbol->encoded_data[y_coord][x_char] += 0x10; break;
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case 5: symbol->encoded_data[y_coord][x_char] += 0x20; break;
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case 6: symbol->encoded_data[y_coord][x_char] += 0x40; break;
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} /* The last binary digit is reserved for colour barcodes */
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#endif
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}
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void unset_module(struct zint_symbol *symbol, int y_coord, int x_coord)
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{
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symbol->encoded_data[y_coord][x_coord / 7] &= ~(1 << (x_coord % 7));
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#if 0
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int x_char, x_sub;
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x_char = x_coord / 7;
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x_sub = x_coord % 7;
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switch(x_sub) {
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case 0: symbol->encoded_data[y_coord][x_char] -= 0x01; break;
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case 1: symbol->encoded_data[y_coord][x_char] -= 0x02; break;
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case 2: symbol->encoded_data[y_coord][x_char] -= 0x04; break;
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case 3: symbol->encoded_data[y_coord][x_char] -= 0x08; break;
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case 4: symbol->encoded_data[y_coord][x_char] -= 0x10; break;
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case 5: symbol->encoded_data[y_coord][x_char] -= 0x20; break;
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case 6: symbol->encoded_data[y_coord][x_char] -= 0x40; break;
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} /* The last binary digit is reserved for colour barcodes */
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#endif
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}
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void expand(struct zint_symbol *symbol, char data[])
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{ /* Expands from a width pattern to a bit pattern */
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unsigned int reader, n = strlen(data);
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int writer, i;
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char latch;
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writer = 0;
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latch = '1';
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for(reader = 0; reader < n; reader++) {
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for(i = 0; i < ctoi(data[reader]); i++) {
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if(latch == '1') { set_module(symbol, symbol->rows, writer); }
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writer++;
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}
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latch = (latch == '1' ? '0' : '1');
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}
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if(symbol->symbology != BARCODE_PHARMA) {
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if(writer > symbol->width) {
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symbol->width = writer;
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}
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} else {
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/* Pharmacode One ends with a space - adjust for this */
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if(writer > symbol->width + 2) {
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symbol->width = writer - 2;
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}
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}
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symbol->rows = symbol->rows + 1;
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}
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int is_stackable(int symbology) {
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/* Indicates which symbologies can have row binding */
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if(symbology < BARCODE_PDF417) { return 1; }
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if(symbology == BARCODE_CODE128B) { return 1; }
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if(symbology == BARCODE_ISBNX) { return 1; }
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if(symbology == BARCODE_EAN14) { return 1; }
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if(symbology == BARCODE_NVE18) { return 1; }
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if(symbology == BARCODE_KOREAPOST) { return 1; }
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if(symbology == BARCODE_PLESSEY) { return 1; }
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if(symbology == BARCODE_TELEPEN_NUM) { return 1; }
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if(symbology == BARCODE_ITF14) { return 1; }
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if(symbology == BARCODE_CODE32) { return 1; }
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return 0;
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}
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int is_extendable(int symbology) {
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/* Indicates which symbols can have addon */
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if(symbology == BARCODE_EANX) { return 1; }
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if(symbology == BARCODE_UPCA) { return 1; }
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if(symbology == BARCODE_UPCE) { return 1; }
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if(symbology == BARCODE_ISBNX) { return 1; }
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if(symbology == BARCODE_UPCA_CC) { return 1; }
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if(symbology == BARCODE_UPCE_CC) { return 1; }
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if(symbology == BARCODE_EANX_CC) { return 1; }
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return 0;
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}
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int roundup(float input)
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{
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float remainder;
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int integer_part;
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integer_part = (int)input;
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remainder = input - integer_part;
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if(remainder > 0.1) {
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integer_part++;
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}
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return integer_part;
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}
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int istwodigits(unsigned char source[], int position)
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{
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if((source[position] >= '0') && (source[position] <= '9')) {
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if((source[position + 1] >= '0') && (source[position + 1] <= '9')) {
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return 1;
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}
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}
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return 0;
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}
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float froundup(float input)
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{
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float fraction, output = 0.0;
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fraction = input - (int)input;
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if(fraction > 0.01) { output = (input - fraction) + 1.0; } else { output = input; }
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return output;
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}
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int latin1_process(struct zint_symbol *symbol, unsigned char source[], unsigned char preprocessed[], int *length)
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{
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int j, i, next;
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/* Convert Unicode to Latin-1 for those symbologies which only support Latin-1 */
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j = 0;
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i = 0;
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do {
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next = -1;
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if(source[i] < 128) {
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preprocessed[j] = source[i];
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j++;
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next = i + 1;
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} else {
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if(source[i] == 0xC2) {
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preprocessed[j] = source[i + 1];
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j++;
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next = i + 2;
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}
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if(source[i] == 0xC3) {
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preprocessed[j] = source[i + 1] + 64;
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j++;
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next = i + 2;
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}
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}
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if(next == -1) {
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strcpy(symbol->errtxt, "error: Invalid character in input string (only Latin-1 characters supported)");
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return ERROR_INVALID_DATA1;
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}
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i = next;
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} while(i < *length);
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preprocessed[j] = '\0';
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*length = j;
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return 0;
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}
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int utf8toutf16(struct zint_symbol *symbol, unsigned char source[], int vals[], int *length)
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{
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int bpos, jpos, error_number;
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int next;
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bpos = 0;
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jpos = 0;
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error_number = 0;
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next = 0;
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do {
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if(source[bpos] <= 0x7f) {
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/* 1 byte mode (7-bit ASCII) */
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vals[jpos] = source[bpos];
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next = bpos + 1;
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jpos++;
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} else {
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if((source[bpos] >= 0x80) && (source[bpos] <= 0xbf)) {
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strcpy(symbol->errtxt, "Corrupt Unicode data");
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return ERROR_INVALID_DATA1;
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}
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if((source[bpos] >= 0xc0) && (source[bpos] <= 0xc1)) {
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strcpy(symbol->errtxt, "Overlong encoding not supported");
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return ERROR_INVALID_DATA1;
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}
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if((source[bpos] >= 0xc2) && (source[bpos] <= 0xdf)) {
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/* 2 byte mode */
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vals[jpos] = ((source[bpos] & 0x1f) << 6) + (source[bpos + 1] & 0x3f);
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next = bpos + 2;
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jpos++;
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} else
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if((source[bpos] >= 0xe0) && (source[bpos] <= 0xef)) {
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/* 3 byte mode */
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vals[jpos] = ((source[bpos] & 0x0f) << 12) + ((source[bpos + 1] & 0x3f) << 6) + (source[bpos + 2] & 0x3f);
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next = bpos + 3;
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jpos ++;
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} else
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if(source[bpos] >= 0xf0) {
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strcpy(symbol->errtxt, "Unicode sequences of more than 3 bytes not supported");
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return ERROR_INVALID_DATA1;
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}
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}
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bpos = next;
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} while(bpos < *length);
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*length = jpos;
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return error_number;
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}
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