LICENSE

Diff: zbar/decoder/ean.h

Revision:

0:56c5742b9e2b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/zbar/decoder/ean.h	Tue Apr 19 02:00:37 2016 +0000
@@ -0,0 +1,85 @@
+/*------------------------------------------------------------------------
+ *  Copyright 2007-2009 (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_ADDON 0x40        /*   scanning add-on */
+#define STATE_IDX   0x1f        /*   element offset into symbol */
+    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;
+    zbar_symbol_type_t addon;
+    unsigned s4;                /* 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;
+} 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 = ean->addon = ZBAR_NONE;
+}
+
+static inline unsigned ean_get_config (ean_decoder_t *ean,
+                                       zbar_symbol_type_t sym)
+{
+    switch(sym & ZBAR_SYMBOL) {
+    case ZBAR_EAN13:  return(ean->ean13_config);
+    case ZBAR_EAN8:   return(ean->ean8_config);
+    case ZBAR_UPCA:   return(ean->upca_config);
+    case ZBAR_UPCE:   return(ean->upce_config);
+    case ZBAR_ISBN10: return(ean->isbn10_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
+