1 files changed, 80 insertions, 0 deletions
diff --git a/zbar/decoder/databar.h b/zbar/decoder/databar.h
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+++ b/zbar/decoder/databar.h
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+/*------------------------------------------------------------------------
+ *  Copyright 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 _DATABAR_H_
+#define _DATABAR_H_
+
+#define DATABAR_MAX_SEGMENTS 32
+
+/* active DataBar (partial) segment entry */
+typedef struct databar_segment_s {
+    signed finder  : 5; /* finder pattern */
+    unsigned exp   : 1; /* DataBar expanded finder */
+    unsigned color : 1; /* finder coloring */
+    unsigned side  : 1; /* data character side of finder */
+
+    unsigned partial : 1; /* unpaired partial segment */
+    unsigned count   : 7; /* times encountered */
+    unsigned epoch   : 8; /* age, in characters scanned */
+    unsigned check   : 8; /* bar checksum */
+    signed short data;	  /* decoded character data */
+    unsigned short width; /* measured width of finder (14 modules) */
+} databar_segment_t;
+
+/* DataBar specific decode state */
+typedef struct databar_decoder_s {
+    unsigned config; /* decoder configuration flags */
+    unsigned config_exp;
+
+    unsigned csegs : 8; /* allocated segments */
+    unsigned epoch : 8; /* current scan */
+
+    databar_segment_t *segs; /* active segment list */
+    signed char chars[16];   /* outstanding character indices */
+} databar_decoder_t;
+
+/* reset DataBar segment decode state */
+static inline void databar_new_scan(databar_decoder_t *db)
+{
+    int i;
+    for (i = 0; i < 16; i++)
+	if (db->chars[i] >= 0) {
+	    databar_segment_t *seg = db->segs + db->chars[i];
+	    if (seg->partial)
+		seg->finder = -1;
+	    db->chars[i] = -1;
+	}
+}
+
+/* reset DataBar accumulated segments */
+static inline void databar_reset(databar_decoder_t *db)
+{
+    int i, n = db->csegs;
+    databar_new_scan(db);
+    for (i = 0; i < n; i++)
+	db->segs[i].finder = -1;
+}
+
+/* decode DataBar symbols */
+zbar_symbol_type_t _zbar_decode_databar(zbar_decoder_t *dcode);
+
+#endif