-
Notifications
You must be signed in to change notification settings - Fork 125
/
dmtxsymbol.c
207 lines (179 loc) · 7.7 KB
/
dmtxsymbol.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
/**
* libdmtx - Data Matrix Encoding/Decoding Library
* Copyright 2008, 2009 Mike Laughton. All rights reserved.
* Copyright 2012-2016 Vadim A. Misbakh-Soloviov. All rights reserved.
* Copyright 2016 Tim Zaman. All rights reserved.
*
* See LICENSE file in the main project directory for full
* terms of use and distribution.
*
* Contact:
* Vadim A. Misbakh-Soloviov <dmtx@mva.name>
* Mike Laughton <mike@dragonflylogic.com>
*
* \file dmtxsymbol.c
* \brief Data Matrix symbol attributes
*/
/**
* \brief Retrieve symbol index from rows and columns
* \param rows
* \param cols
* \return sizeIdx value
*/
extern int
getSizeIdxFromSymbolDimension(int rows, int cols)
{
int symbolRows, symbolCols, i;
for (i=0; i<30; i++){
symbolRows = dmtxGetSymbolAttribute(DmtxSymAttribSymbolRows, i);
symbolCols = dmtxGetSymbolAttribute(DmtxSymAttribSymbolCols, i);
if (rows==symbolRows && cols==symbolCols){
return i;
}
}
return -1;
}
/**
* \brief Retrieve property based on symbol size
* \param attribute
* \param sizeIdx
* \return Attribute value
*/
extern int
dmtxGetSymbolAttribute(int attribute, int sizeIdx)
{
static const int symbolRows[] = { 10, 12, 14, 16, 18, 20, 22, 24, 26,
32, 36, 40, 44, 48, 52,
64, 72, 80, 88, 96, 104,
120, 132, 144,
8, 8, 12, 12, 16, 16 };
static const int symbolCols[] = { 10, 12, 14, 16, 18, 20, 22, 24, 26,
32, 36, 40, 44, 48, 52,
64, 72, 80, 88, 96, 104,
120, 132, 144,
18, 32, 26, 36, 36, 48 };
static const int dataRegionRows[] = { 8, 10, 12, 14, 16, 18, 20, 22, 24,
14, 16, 18, 20, 22, 24,
14, 16, 18, 20, 22, 24,
18, 20, 22,
6, 6, 10, 10, 14, 14 };
static const int dataRegionCols[] = { 8, 10, 12, 14, 16, 18, 20, 22, 24,
14, 16, 18, 20, 22, 24,
14, 16, 18, 20, 22, 24,
18, 20, 22,
16, 14, 24, 16, 16, 22 };
static const int horizDataRegions[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2,
4, 4, 4, 4, 4, 4,
6, 6, 6,
1, 2, 1, 2, 2, 2 };
static const int interleavedBlocks[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 2,
2, 4, 4, 4, 4, 6,
6, 8, 10,
1, 1, 1, 1, 1, 1 };
static const int symbolDataWords[] = { 3, 5, 8, 12, 18, 22, 30, 36, 44,
62, 86, 114, 144, 174, 204,
280, 368, 456, 576, 696, 816,
1050, 1304, 1558,
5, 10, 16, 22, 32, 49 };
static const int blockErrorWords[] = { 5, 7, 10, 12, 14, 18, 20, 24, 28,
36, 42, 48, 56, 68, 42,
56, 36, 48, 56, 68, 56,
68, 62, 62,
7, 11, 14, 18, 24, 28 };
static const int blockMaxCorrectable[] = { 2, 3, 5, 6, 7, 9, 10, 12, 14,
18, 21, 24, 28, 34, 21,
28, 18, 24, 28, 34, 28,
34, 31, 31,
3, 5, 7, 9, 12, 14 };
if(sizeIdx < 0 || sizeIdx >= DmtxSymbolSquareCount + DmtxSymbolRectCount)
return DmtxUndefined;
switch(attribute) {
case DmtxSymAttribSymbolRows:
return symbolRows[sizeIdx];
case DmtxSymAttribSymbolCols:
return symbolCols[sizeIdx];
case DmtxSymAttribDataRegionRows:
return dataRegionRows[sizeIdx];
case DmtxSymAttribDataRegionCols:
return dataRegionCols[sizeIdx];
case DmtxSymAttribHorizDataRegions:
return horizDataRegions[sizeIdx];
case DmtxSymAttribVertDataRegions:
return (sizeIdx < DmtxSymbolSquareCount) ? horizDataRegions[sizeIdx] : 1;
case DmtxSymAttribMappingMatrixRows:
return dataRegionRows[sizeIdx] *
dmtxGetSymbolAttribute(DmtxSymAttribVertDataRegions, sizeIdx);
case DmtxSymAttribMappingMatrixCols:
return dataRegionCols[sizeIdx] * horizDataRegions[sizeIdx];
case DmtxSymAttribInterleavedBlocks:
return interleavedBlocks[sizeIdx];
case DmtxSymAttribBlockErrorWords:
return blockErrorWords[sizeIdx];
case DmtxSymAttribBlockMaxCorrectable:
return blockMaxCorrectable[sizeIdx];
case DmtxSymAttribSymbolDataWords:
return symbolDataWords[sizeIdx];
case DmtxSymAttribSymbolErrorWords:
return blockErrorWords[sizeIdx] * interleavedBlocks[sizeIdx];
case DmtxSymAttribSymbolMaxCorrectable:
return blockMaxCorrectable[sizeIdx] * interleavedBlocks[sizeIdx];
}
return DmtxUndefined;
}
/**
* \brief Retrieve data size for a specific symbol size and block number
* \param sizeIdx
* \param blockIdx
* \return Attribute value
*/
extern int
dmtxGetBlockDataSize(int sizeIdx, int blockIdx)
{
int symbolDataWords;
int interleavedBlocks;
int count;
symbolDataWords = dmtxGetSymbolAttribute(DmtxSymAttribSymbolDataWords, sizeIdx);
interleavedBlocks = dmtxGetSymbolAttribute(DmtxSymAttribInterleavedBlocks, sizeIdx);
if(symbolDataWords < 1 || interleavedBlocks < 1)
return DmtxUndefined;
count = (int)(symbolDataWords/interleavedBlocks);
return (sizeIdx == DmtxSymbol144x144 && blockIdx < 8) ? count + 1 : count;
}
/**
* \brief Determine symbol size based on data size and requested properties
* \param dataWords
* \param sizeIdxRequest
* \return Symbol size index (or DmtxUndefined if none)
*/
static int
FindSymbolSize(int dataWords, int sizeIdxRequest)
{
int sizeIdx;
int idxBeg, idxEnd;
if(dataWords <= 0)
return DmtxUndefined;
if(sizeIdxRequest == DmtxSymbolSquareAuto || sizeIdxRequest == DmtxSymbolRectAuto) {
if(sizeIdxRequest == DmtxSymbolSquareAuto) {
idxBeg = 0;
idxEnd = DmtxSymbolSquareCount;
}
else {
idxBeg = DmtxSymbolSquareCount;
idxEnd = DmtxSymbolSquareCount + DmtxSymbolRectCount;
}
for(sizeIdx = idxBeg; sizeIdx < idxEnd; sizeIdx++) {
if(dmtxGetSymbolAttribute(DmtxSymAttribSymbolDataWords, sizeIdx) >= dataWords)
break;
}
if(sizeIdx == idxEnd)
return DmtxUndefined;
}
else {
sizeIdx = sizeIdxRequest;
}
if(dataWords > dmtxGetSymbolAttribute(DmtxSymAttribSymbolDataWords, sizeIdx))
return DmtxUndefined;
return sizeIdx;
}