hlp:桂林国际齿轮泵代码
This commit is contained in:
kite_lucs
@@ -0,0 +1,774 @@
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/*
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* ean.c -- encoding for ean, upc and isbn
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*
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* Copyright (c) 1999 Alessandro Rubini <rubini@gnu.org>
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* Copyright (c) 1999 Prosa Srl. <prosa@prosa.it>
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* Copyright (c) 2001 Boszormenyi Zoltan <zboszor@mail.externet.hu>
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*
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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 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include "barcode.h"
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/*
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* IMPORTANT NOTE: if you are reading this file to learn how to add a
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* new encoding type, this is the wrong place as there are too many
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* special cases. Please refer to code39.c instead. If you want to
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* learn how UPC, EAN, ISBN work, on the other hand, I did my best to
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* commend things and hope you enjoy it.
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*/
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/*
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* These following static arrays are used to describe the barcode.
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*
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* The various forms of UPC and EAN are documented as using three
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* different alphabets to encode the ten digits. However, each digit
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* has exactly one encoding; only, it is sometimes mirrored. Moreover,
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* if you represent the width of each symbol (bar/space) instead of
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* the sequence of 1's and 0's, you find that even-parity and odd-parity
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* encoding are exactly the same. So, here are the digits: */
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static char *digits[] = {
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"3211","2221","2122","1411","1132",
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"1231","1114","1312","1213","3112"};
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/*
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* What EAN encoding does is adding a leading digit (the 13th digit).
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* Such an extra digit is encoded by mirroring three of the six digits that
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* appear in the left half of the UPC code. Here how mirroring works:
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*/
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static char *ean_mirrortab[] = {
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"------","--1-11","--11-1","--111-","-1--11",
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"-11--1","-111--","-1-1-1","-1-11-","-11-1-"
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};
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/*
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* UPC-E (the 6-digit one), instead, encodes the check character as
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* a mirroring of the symbols. This is similar, but the encoding for "0" is
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* different (EAN uses no mirroring for "0" to be compatible with UPC).
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* The same rule is used for UPC-5 (the supplemental digits for ISBN)
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*/
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static char *upc_mirrortab[] = {
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"---111","--1-11","--11-1","--111-","-1--11",
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"-11--1","-111--","-1-1-1","-1-11-","-11-1-"
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};
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/*
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* UPC-E mirroring for encoding "1"
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*/
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static char *upc_mirrortab1[] = {
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"111---","11-1--","11--1-","11---1","1-11--",
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"1--11-","1---11","1-1-1-","1-1--1","1--1-1"
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};
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/* UPC-2 has just two digits to mirror */
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static char *upc_mirrortab2[] = {
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"11","1-","-1","--"
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};
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/*
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* initial, middle, final guard bars (first symbol is a a space).
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* EAN-13 overwrites the first "0" with "9" to make space for the extra digit.
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*/
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static char *guard[] = {"0a1a","1a1a1","a1a"};
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/* initial, final guard bars for UPC-E*/
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static char *guardE[] = {"0a1a","1a1a1a"};
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/* initial and inter-char guard bars for supplementals (first is space) */
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static char *guardS[] = {"9112","11"};
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/*
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* These functions are shortcuts I use in the encoding engine
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*/
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static int ean_make_checksum(char *text, int mode)
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{
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int esum = 0, osum = 0, i;
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int even=1; /* last char is even */
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if (strchr(text, ' '))
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i = strchr(text, ' ') - text; /* end of first part */
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else
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i = strlen(text); /* end of all */
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while (i-- > 0) {
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if (even) esum += text[i]-'0';
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else osum += text[i]-'0';
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even = !even;
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}
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if (!mode) { /* standard upc/ean checksum */
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i = (3*esum + osum) % 10;
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return (10-i) % 10; /* complement to 10 */
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} else { /* add-5 checksum */
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i = (3*esum + 9*osum);
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return i%10;
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}
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}
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/*
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* Check that the text can be encoded. Returns 0 or -1.
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* Accept:
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* 13 or 12 digits: EAN-13 w/ or w/o checksum
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* or
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* 8 or 7 digits: EAN-8 w/ or w/o checksum.
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* For both EAN-13 and EAN-8, accept an addon of 2 or 5 digits,
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* separated by ' '
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*/
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int Barcode_ean_verify(unsigned char *text)
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{
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int i, len0, len, addon;
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unsigned char tmp[24], *spc;
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len = strlen(text);
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spc = strchr(text, ' ');
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if (spc) {
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len0 = spc - text;
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addon = len - len0 - 1;
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if (addon != 2 && addon != 5)
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return -1;
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for (i=len0+1; i<len; i++)
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if (!isdigit(text[i]))
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return -1;
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} else
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len0 = len;
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for (i=0; i<len0; i++)
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if (!isdigit(text[i]))
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return -1;
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switch (len0) {
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case 8:
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strncpy(tmp, text, 7);
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tmp[7] = '\0';
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if (text[7] != (ean_make_checksum(tmp, 0) + '0'))
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return -1;
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case 7:
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break;
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case 13:
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strncpy(tmp, text, 12);
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tmp[12] = '\0';
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if (text[12] != (ean_make_checksum(tmp, 0) + '0'))
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return -1;
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case 12:
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break;
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default:
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return -1;
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}
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return 0;
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}
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/* Expand the middle part of UPC-E to UPC-A */
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static char *upc_e_to_a0(unsigned char *text)
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{
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static char result[16];
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strcpy(result, "00000000000"); /* 11 0's */
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switch(text[5]) { /* last char */
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case '0': case '1': case '2':
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strncpy(result+1, text, 2); result[3]=text[5]; /* Manuf. */
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memcpy(result+8, text+2, 3); /* Product */
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break;
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case '3':
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memcpy(result+1, text, 3); /* Manufacturer */
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memcpy(result+9, text+3, 2); /* Product */
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break;
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case '4':
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memcpy(result+1, text, 4); /* Manufacturer */
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memcpy(result+10, text+4, 1); /* Product */
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break;
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default:
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memcpy(result+1, text, 5); /* Manufacturer */
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memcpy(result+10, text+5, 1); /* Product */
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break;
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}
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return result;
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}
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/* Try to expand an UPC-E barcode to its UPC-A equivalent.
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* Accept 6, 7 or 8-digit sequence (not counting the addon):
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* 6: only the middle part, encoding "0", w/o checksum.
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* 7: the middle part, encoding "0" with a correct checksum
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* or
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* the middle part, encoding "0" or "1" prepended
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* 8: fully qualified UPC-E with checksum.
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*
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* Returns a 11 digit UPC-A (w/o checksum) for valid EPC-E barcode
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* or an empty string for an invalid one.
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*
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* The checksum for UPC-E is calculated using its UPC-A equivalent.
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*/
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static char *upc_e_to_a(unsigned char *text)
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{
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static unsigned char result[16], *spc;
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int len, chk;
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spc = strchr(text, ' ');
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if (spc)
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len = spc - text;
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else
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len = strlen(text);
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switch (len) {
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case 6:
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strcpy(result, upc_e_to_a0(text));
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return result;
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case 7:
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/* the first char is '0' or '1':
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* valid number system for UPC-E and no checksum
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*/
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if (text[0] == '0' || text[0] == '1') {
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strcpy(result, upc_e_to_a0(text+1));
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result[0] = text[0];
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return result;
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}
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/* Find out whether the 7th char is correct checksum */
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strcpy(result, upc_e_to_a0(text));
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chk = ean_make_checksum(result, 0);
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if (chk == (text[len-1] - '0'))
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return result;
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/* Invalid 7 digit representation for UPC-E. */
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return NULL;
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case 8:
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if (text[0] == '0' || text[0] == '1') {
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strcpy(result, upc_e_to_a0(text+1));
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result[0] = text[0];
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chk = ean_make_checksum(result, 0);
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if (chk == (text[len-1] - '0'))
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return result;
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}
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default:
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/* Invalid representation for UPC-E. */
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return NULL;
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}
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}
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/*
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* Accept a 11 or 12 digit UPC-A barcode and
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* shrink it into an 8-digit UPC-E equivalent if possible.
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* Return NULL if impossible, the UPC-E barcode if possible.
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*/
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static unsigned char *upc_a_to_e(unsigned char *text)
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{
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static unsigned char result[16];
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int len, chksum;
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len = strlen(text);
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switch (len) {
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case 12:
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strcpy(result, text);
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result[11] = '\0';
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chksum = ean_make_checksum(result, 0);
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if (text[11] != (chksum - '0'))
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return NULL;
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break;
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case 11:
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chksum = ean_make_checksum(text, 0);
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break;
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default:
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return NULL;
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}
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strcpy(result, "00000000"); /* 8 0's*/
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/* UPC-E can only be used with number system 0 or 1 */
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if (text[0] != '0' && text[0] != '1')
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return NULL;
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result[0] = text[0];
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if ((text[3] == '0' || text[3] == '1' || text[3] == '2')
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&& !strncmp(text+4, "0000", 4)) {
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memcpy(&result[1], text+1, 2);
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memcpy(&result[3], text+8, 3);
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result[6] = text[3];
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} else if (!strncmp(text+4, "00000", 5)) {
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memcpy(&result[1], text+1, 3);
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memcpy(&result[4], text+9, 2);
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result[6] = '3';
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} else if (!strncmp(text+5, "00000", 5)) {
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memcpy(&result[1], text+1, 4);
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result[5] = text[10];
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result[6] = '4';
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} else if ((text[5] != '0') && !strncmp(text+6, "0000", 4)
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&& text[10] >= '5' && text[10] <= '9') {
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memcpy(&result[1], text+1, 5);
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result[6] = text[10];
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} else {
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return NULL;
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}
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result[7] = chksum + '0';
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return result;
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}
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/*
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* UPC-A is the same as EAN, but accept
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* 12 or 11 digits (UPC-A w/ or w/o checksum)
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* or accept UPC-E as:
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* 6 digits (w/o number system and checksum): number system '0' assumed,
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* 7 digits (either w/o number system or checksum),
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* 8 digits (w/ number system and checksum)
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* plus the 2 or 5-digit add-on
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*/
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int Barcode_upc_verify(unsigned char *text)
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{
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int i, len0, len, addon;
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unsigned char tmp[24], *spc;
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len = strlen(text);
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spc = strchr(text, ' ');
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if (spc) {
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len0 = spc - text;
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addon = len - len0 - 1;
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if (addon != 2 && addon != 5)
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return -1;
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for (i=len0+1; i<len; i++)
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if (!isdigit(text[i]))
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return -1;
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} else
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len0 = len;
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for (i=0; i<len0; i++)
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if (!isdigit(text[i]))
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return -1;
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switch (len0) {
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case 6: case 7: case 8:
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strncpy(tmp, text, len0);
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tmp[len0] = '\0';
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if (!upc_e_to_a(tmp))
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return -1;
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break;
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case 12:
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strncpy(tmp, text, 11);
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tmp[11] = '\0';
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if (text[11] != (ean_make_checksum(tmp, 0) + '0'))
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return -1;
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case 11:
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break;
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default:
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return -1;
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}
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return 0;
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}
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/*
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* Isbn is the same as EAN, just shorter. Dashes are accepted, the
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* check character (if specified) is skipped, the extra 5 digits are
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* accepted after a blank.
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*/
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int Barcode_isbn_verify(unsigned char *text)
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{
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int i, ndigit=0;
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for (i=0; text[i]; i++) {
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if (text[i] == '-')
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continue;
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if (isdigit(text[i])) {
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ndigit++;
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if (ndigit == 9) { /* got it all */
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i++; break;
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}
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continue;
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}
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return -1; /* found non-digit */
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}
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if (ndigit!=9) return -1; /* too short */
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/* skip an hyphen, if any */
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if (text[i] == '-')
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i++;
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/* accept one more char if any (the checksum) */
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if (isdigit(text[i]) || toupper(text[i])=='X')
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i++;
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if (text[i] == '\0')
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return 0; /* Ok */
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/* and accept the extra price tag (blank + 5 digits), if any */
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if (strlen(text+i) != 6)
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return -1;
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if (text[i] != ' ')
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return -1;
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i++; /* skip the blank */
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while (text[i]) {
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if (!isdigit(text[i]))
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return -1;
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i++;
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}
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return 0; /* Ok: isbn + 5-digit addon */
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}
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static int width_of_partial(unsigned char *partial)
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{
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int i=0;
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while (*partial) {
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if (isdigit(*partial))
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i += *partial - '0';
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else if (islower(*partial))
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i += *partial - 'a' + 1;
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partial++;
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}
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return i;
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}
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/*
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* The encoding functions fills the "partial" and "textinfo" fields.
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* This one deals with both upc (-A and -E) and ean (13 and 8).
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*/
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int Barcode_ean_encode(struct Barcode_Item *bc)
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{
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static char text[24];
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static char partial[256];
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static char textinfo[256];
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char *mirror, *ptr1, *ptr2, *tptr = textinfo; /* where text is written */
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char *spc;
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enum {UPCA, UPCE, EAN13, EAN8, ISBN} encoding = ISBN;
|
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int i, xpos, checksum, len, len0, addon;
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if (!bc->ascii) {
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bc->error = EINVAL;
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return -1;
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}
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/* Find out whether the barcode has addon and
|
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* the length of the barcode w/o the addon.
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*/
|
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len = strlen(bc->ascii);
|
||||
spc = strchr(bc->ascii, ' ');
|
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if (spc) {
|
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len0 = spc - bc->ascii;
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addon = strlen(spc + 1);
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if (addon != 2 && addon != 5) {
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||||
bc->error = EINVAL; /* impossible, actually */
|
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return -1;
|
||||
}
|
||||
} else {
|
||||
len0 = len;
|
||||
addon = 0;
|
||||
}
|
||||
|
||||
if (!bc->encoding) {
|
||||
/* ISBN already wrote what it is; if unknown, find it out */
|
||||
|
||||
/*
|
||||
* Do not decide only by barcode length, it may be ambiguous.
|
||||
* Anyway, either the user specified the barcode type or
|
||||
* we already found a fitting one.
|
||||
*/
|
||||
switch(bc->flags & BARCODE_ENCODING_MASK) {
|
||||
case BARCODE_EAN:
|
||||
switch (len0) {
|
||||
case 7: case 8:
|
||||
bc->encoding = strdup("EAN-8");
|
||||
encoding = EAN8;
|
||||
break;
|
||||
case 12: case 13:
|
||||
bc->encoding = strdup("EAN-13");
|
||||
encoding = EAN13;
|
||||
break;
|
||||
default:
|
||||
bc->error = -EINVAL;
|
||||
return -1;
|
||||
}
|
||||
break;
|
||||
|
||||
case BARCODE_UPC:
|
||||
switch (len0) {
|
||||
case 6: case 7: case 8:
|
||||
bc->encoding = strdup("UPC-E");
|
||||
encoding = UPCE;
|
||||
break;
|
||||
case 11: case 12:
|
||||
bc->encoding = strdup("UPC-A");
|
||||
encoding = UPCA;
|
||||
break;
|
||||
default:
|
||||
bc->error = -EINVAL;
|
||||
return -1;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
/* else, it's wrong (impossible, as the text is checked) */
|
||||
bc->error = -EINVAL;
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
/* better safe than sorry */
|
||||
if (bc->partial) free(bc->partial); bc->partial = NULL;
|
||||
if (bc->textinfo) free(bc->textinfo); bc->textinfo = NULL;
|
||||
|
||||
if (encoding == UPCA) { /* add the leading 0 (not printed) */
|
||||
text[0] = '0';
|
||||
strcpy(text+1, bc->ascii);
|
||||
} else if (encoding == UPCE) {
|
||||
strcpy(text, upc_a_to_e(upc_e_to_a(bc->ascii)));
|
||||
} else {
|
||||
strcpy(text, bc->ascii);
|
||||
}
|
||||
|
||||
/*
|
||||
* build the checksum and the bars: any encoding is slightly different
|
||||
*/
|
||||
if (encoding == UPCA || encoding == EAN13 || encoding == ISBN) {
|
||||
if (!(encoding == UPCA && len0 == 12) &&
|
||||
!(encoding == EAN13 && len0 == 13)) {
|
||||
checksum = ean_make_checksum(text, 0);
|
||||
text[12] = '0' + checksum; /* add it to the text */
|
||||
text[13] = '\0';
|
||||
}
|
||||
|
||||
strcpy(partial, guard[0]);
|
||||
if (encoding == EAN13 || encoding == ISBN) { /* The first digit */
|
||||
sprintf(tptr,"0:12:%c ",text[0]);
|
||||
tptr += strlen(tptr);
|
||||
partial[0] = '9'; /* extra space for the digit */
|
||||
} else if (encoding == UPCA)
|
||||
partial[0] = '9'; /* UPC has one digit before the symbol, too */
|
||||
xpos = width_of_partial(partial);
|
||||
mirror = ean_mirrortab[text[0]-'0'];
|
||||
|
||||
/* left part */
|
||||
for (i=1;i<7;i++) {
|
||||
ptr1 = partial + strlen(partial); /* target */
|
||||
ptr2 = digits[text[i]-'0']; /* source */
|
||||
strcpy(ptr1, ptr2);
|
||||
if (mirror[i-1] == '1') {
|
||||
/* mirror this */
|
||||
ptr1[0] = ptr2[3];
|
||||
ptr1[1] = ptr2[2];
|
||||
ptr1[2] = ptr2[1];
|
||||
ptr1[3] = ptr2[0];
|
||||
}
|
||||
/*
|
||||
* Write the ascii digit. UPC has a special case
|
||||
* for the first digit, which is out of the bars
|
||||
*/
|
||||
if (encoding == UPCA && i==1) {
|
||||
sprintf(tptr, "0:10:%c ", text[i]);
|
||||
tptr += strlen(tptr);
|
||||
ptr1[1] += 'a'-'1'; /* bars are long */
|
||||
ptr1[3] += 'a'-'1';
|
||||
} else {
|
||||
sprintf(tptr, "%i:12:%c ", xpos, text[i]);
|
||||
tptr += strlen(tptr);
|
||||
}
|
||||
/* count the width of the symbol */
|
||||
xpos += 7; /* width_of_partial(ptr2) */
|
||||
}
|
||||
|
||||
strcat(partial, guard[1]); /* middle */
|
||||
xpos += width_of_partial(guard[1]);
|
||||
|
||||
/* right part */
|
||||
for (i=7;i<13;i++) {
|
||||
ptr1 = partial + strlen(partial); /* target */
|
||||
ptr2 = digits[text[i]-'0']; /* source */
|
||||
strcpy(ptr1, ptr2);
|
||||
/*
|
||||
* Ascii digit. Once again, UPC has a special
|
||||
* case for the last digit
|
||||
*/
|
||||
if (encoding == UPCA && i==12) {
|
||||
sprintf(tptr, "%i:10:%c ", xpos+13, text[i]);
|
||||
tptr += strlen(tptr);
|
||||
ptr1[0] += 'a'-'1'; /* bars are long */
|
||||
ptr1[2] += 'a'-'1';
|
||||
} else {
|
||||
sprintf(tptr, "%i:12:%c ", xpos, text[i]);
|
||||
tptr += strlen(tptr);
|
||||
}
|
||||
xpos += 7; /* width_of_partial(ptr2) */
|
||||
}
|
||||
tptr[-1] = '\0'; /* overwrite last space */
|
||||
strcat(partial, guard[2]); /* end */
|
||||
xpos += width_of_partial(guard[2]);
|
||||
|
||||
} else if (encoding == UPCE) {
|
||||
checksum = text[7] - '0';
|
||||
|
||||
strcpy(partial, guardE[0]);
|
||||
partial[0] = '9'; /* UPC-A has one digit before the symbol, too */
|
||||
xpos = width_of_partial(partial);
|
||||
|
||||
/* UPC-E has the number system written before the bars. */
|
||||
sprintf(tptr, "0:10:%c ", text[0]);
|
||||
tptr += strlen(tptr);
|
||||
|
||||
if (text[0] == '0')
|
||||
mirror = upc_mirrortab[checksum];
|
||||
else
|
||||
mirror = upc_mirrortab1[checksum];
|
||||
|
||||
for (i=0;i<6;i++) {
|
||||
ptr1 = partial + strlen(partial); /* target */
|
||||
ptr2 = digits[text[i+1]-'0']; /* source */
|
||||
strcpy(ptr1, ptr2);
|
||||
if (mirror[i] != '1') { /* negated wrt EAN13 */
|
||||
/* mirror this */
|
||||
ptr1[0] = ptr2[3];
|
||||
ptr1[1] = ptr2[2];
|
||||
ptr1[2] = ptr2[1];
|
||||
ptr1[3] = ptr2[0];
|
||||
}
|
||||
sprintf(tptr, "%i:12:%c ", xpos, text[i+1]);
|
||||
tptr += strlen(tptr);
|
||||
xpos += 7; /* width_of_partial(ptr2) */
|
||||
}
|
||||
|
||||
sprintf(tptr, "%i:10:%c ", xpos+10, text[7]);
|
||||
tptr += strlen(tptr);
|
||||
ptr1[0] += 'a'-'1'; /* bars are long */
|
||||
ptr1[2] += 'a'-'1';
|
||||
|
||||
tptr[-1] = '\0'; /* overwrite last space */
|
||||
strcat(partial, guardE[1]); /* end */
|
||||
|
||||
} else { /* EAN-8 almost identical to EAN-13 but no mirroring */
|
||||
|
||||
if (len0 != 8) {
|
||||
checksum = ean_make_checksum(text, 0);
|
||||
text[7] = '0' + checksum; /* add it to the text */
|
||||
text[8] = '\0';
|
||||
}
|
||||
|
||||
strcpy(partial, guard[0]);
|
||||
xpos = width_of_partial(partial);
|
||||
|
||||
/* left part */
|
||||
for (i=0;i<4;i++) {
|
||||
strcpy(partial + strlen(partial), digits[text[i]-'0']);
|
||||
sprintf(tptr, "%i:12:%c ", xpos, text[i]);
|
||||
tptr += strlen(tptr);
|
||||
xpos += 7; /* width_of_partial(digits[text[i]-'0' */
|
||||
}
|
||||
strcat(partial, guard[1]); /* middle */
|
||||
xpos += width_of_partial(guard[1]);
|
||||
|
||||
/* right part */
|
||||
for (i=4;i<8;i++) {
|
||||
strcpy(partial + strlen(partial), digits[text[i]-'0']);
|
||||
sprintf(tptr, "%i:12:%c ", xpos, text[i]);
|
||||
tptr += strlen(tptr);
|
||||
xpos += 7; /* width_of_partial(digits[text[i]-'0' */
|
||||
}
|
||||
tptr[-1] = '\0'; /* overwrite last space */
|
||||
strcat(partial, guard[2]); /* end */
|
||||
}
|
||||
|
||||
/*
|
||||
* And that's it. Now, in case some add-on is specified it
|
||||
* must be encoded too. Look for it.
|
||||
*/
|
||||
if ( (ptr1 = spc) ) {
|
||||
ptr1++;
|
||||
strcpy(text, ptr1);
|
||||
if (strlen(ptr1)==5) {
|
||||
checksum = ean_make_checksum(text, 1 /* special way */);
|
||||
mirror = upc_mirrortab[checksum]+1; /* only last 5 digits */
|
||||
} else {
|
||||
checksum = atoi(text)%4;
|
||||
mirror = upc_mirrortab2[checksum];
|
||||
}
|
||||
strcat(textinfo, " +"); strcat(partial, "+");
|
||||
tptr = textinfo + strlen(textinfo);
|
||||
for (i=0; i<strlen(text); i++) {
|
||||
if (!i) {
|
||||
strcat(partial, guardS[0]); /* separation and head */
|
||||
xpos += width_of_partial(guardS[0]);
|
||||
} else {
|
||||
strcat(partial, guardS[1]);
|
||||
xpos += width_of_partial(guardS[1]);
|
||||
}
|
||||
ptr1 = partial + strlen(partial); /* target */
|
||||
ptr2 = digits[text[i]-'0']; /* source */
|
||||
strcpy(ptr1, ptr2);
|
||||
if (mirror[i] != '1') { /* negated wrt EAN13 */
|
||||
/* mirror this */
|
||||
ptr1[0] = ptr2[3];
|
||||
ptr1[1] = ptr2[2];
|
||||
ptr1[2] = ptr2[1];
|
||||
ptr1[3] = ptr2[0];
|
||||
}
|
||||
/* and the text */
|
||||
sprintf(tptr, " %i:12:%c", xpos, text[i]);
|
||||
tptr += strlen(tptr);
|
||||
xpos += 7; /* width_of_partial(ptr2) */
|
||||
}
|
||||
}
|
||||
|
||||
/* all done, copy results to the data structure */
|
||||
bc->partial = strdup(partial);
|
||||
if (!bc->partial) {
|
||||
bc->error = errno;
|
||||
return -1;
|
||||
}
|
||||
bc->textinfo = strdup(textinfo);
|
||||
if (!bc->textinfo) {
|
||||
bc->error = errno;
|
||||
free(bc->partial);
|
||||
bc->partial = NULL;
|
||||
return -1;
|
||||
}
|
||||
if (!bc->width)
|
||||
bc->width = width_of_partial(partial);
|
||||
|
||||
return 0; /* success */
|
||||
}
|
||||
|
||||
int Barcode_upc_encode(struct Barcode_Item *bc)
|
||||
{
|
||||
return Barcode_ean_encode(bc); /* UPC is folded into EAN */
|
||||
}
|
||||
|
||||
int Barcode_isbn_encode(struct Barcode_Item *bc)
|
||||
{
|
||||
/* For ISBN we must normalize the string and prefix "978" */
|
||||
unsigned char *text = malloc(24); /* 13 + ' ' + 5 plus some slack */
|
||||
unsigned char *otext;
|
||||
int i, j, retval;
|
||||
|
||||
if (!text) {
|
||||
bc->error = ENOMEM;
|
||||
return -1;
|
||||
}
|
||||
strcpy(text, "978"); j=3;
|
||||
|
||||
otext = bc->ascii;
|
||||
for (i=0; otext[i]; i++) {
|
||||
if (isdigit(otext[i]))
|
||||
text[j++] = otext[i];
|
||||
if (j == 12) /* checksum added later */
|
||||
break;
|
||||
}
|
||||
text[j]='\0';
|
||||
if (strchr(otext, ' '))
|
||||
strcat(text, strchr(otext, ' '));
|
||||
bc->ascii = text;
|
||||
bc->encoding = strdup("ISBN");
|
||||
retval = Barcode_ean_encode(bc);
|
||||
bc->ascii = otext; /* restore ascii for the ps comments */
|
||||
free(text);
|
||||
return retval;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user