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/*------------------------------------------------------------------------
* Copyright 2007-2010 (c) Jeff Brown <spadix@users.sourceforge.net>
*
* This file is part of the ZBar Bar Code Reader.
*
* The ZBar Bar Code Reader is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* The ZBar Bar Code Reader is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser Public License
* along with the ZBar Bar Code Reader; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* http://sourceforge.net/projects/zbar
*------------------------------------------------------------------------*/
#ifndef _EAN_H_
#define _EAN_H_
/* state of each parallel decode attempt */
typedef struct ean_pass_s {
signed char state; /* module position of w[idx] in symbol */
#define STATE_REV 0x80 /* scan direction reversed */
#define STATE_ADDON 0x40 /* scanning add-on */
#define STATE_IDX 0x3f /* element offset into symbol */
unsigned width; /* width of last character */
unsigned char raw[7]; /* decode in process */
} ean_pass_t;
/* EAN/UPC specific decode state */
typedef struct ean_decoder_s {
ean_pass_t pass[4]; /* state of each parallel decode attempt */
zbar_symbol_type_t left; /* current holding buffer contents */
zbar_symbol_type_t right;
int direction; /* scan direction */
unsigned s4, width; /* character width */
signed char buf[18]; /* holding buffer */
signed char enable;
unsigned ean13_config;
unsigned ean8_config;
unsigned upca_config;
unsigned upce_config;
unsigned isbn10_config;
unsigned isbn13_config;
unsigned ean5_config;
unsigned ean2_config;
} ean_decoder_t;
/* reset EAN/UPC pass specific state */
static inline void ean_new_scan(ean_decoder_t *ean)
{
ean->pass[0].state = ean->pass[1].state = -1;
ean->pass[2].state = ean->pass[3].state = -1;
ean->s4 = 0;
}
/* reset all EAN/UPC state */
static inline void ean_reset(ean_decoder_t *ean)
{
ean_new_scan(ean);
ean->left = ean->right = ZBAR_NONE;
}
static inline unsigned ean_get_config(ean_decoder_t *ean,
zbar_symbol_type_t sym)
{
switch (sym) {
case ZBAR_EAN2:
return (ean->ean2_config);
case ZBAR_EAN5:
return (ean->ean5_config);
case ZBAR_EAN8:
return (ean->ean8_config);
case ZBAR_UPCE:
return (ean->upce_config);
case ZBAR_ISBN10:
return (ean->isbn10_config);
case ZBAR_UPCA:
return (ean->upca_config);
case ZBAR_EAN13:
return (ean->ean13_config);
case ZBAR_ISBN13:
return (ean->isbn13_config);
default:
return (0);
}
}
/* decode EAN/UPC symbols */
zbar_symbol_type_t _zbar_decode_ean(zbar_decoder_t *dcode);
#endif
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