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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
package tiff
import (
"bytes"
"encoding/binary"
"encoding/hex"
"flag"
"os"
"path/filepath"
"testing"
)
var dataDir = flag.String("test_data_dir", ".", "Directory where the data files for testing are located")
type input struct {
tgId string
tpe string
nVals string
offset string
val string
}
type output struct {
id uint16
typ DataType
count uint32
val []byte
}
type tagTest struct {
big input // big endian
little input // little endian
out output
}
///////////////////////////////////////////////
//// Big endian Tests /////////////////////////
///////////////////////////////////////////////
var set1 = []tagTest{
//////////// string type //////////////
tagTest{
// {"TgId", "TYPE", "N-VALUES", "OFFSET--", "VAL..."},
input{"0003", "0002", "00000002", "11000000", ""},
input{"0300", "0200", "02000000", "11000000", ""},
output{0x0003, DataType(0x0002), 0x0002, []byte{0x11, 0x00}},
},
tagTest{
input{"0001", "0002", "00000006", "00000012", "111213141516"},
input{"0100", "0200", "06000000", "12000000", "111213141516"},
output{0x0001, DataType(0x0002), 0x0006, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16}},
},
//////////// int (1-byte) type ////////////////
tagTest{
input{"0001", "0001", "00000001", "11000000", ""},
input{"0100", "0100", "01000000", "11000000", ""},
output{0x0001, DataType(0x0001), 0x0001, []byte{0x11}},
},
tagTest{
input{"0001", "0001", "00000005", "00000010", "1112131415"},
input{"0100", "0100", "05000000", "10000000", "1112131415"},
output{0x0001, DataType(0x0001), 0x0005, []byte{0x11, 0x12, 0x13, 0x14, 0x15}},
},
tagTest{
input{"0001", "0006", "00000001", "11000000", ""},
input{"0100", "0600", "01000000", "11000000", ""},
output{0x0001, DataType(0x0006), 0x0001, []byte{0x11}},
},
tagTest{
input{"0001", "0006", "00000005", "00000010", "1112131415"},
input{"0100", "0600", "05000000", "10000000", "1112131415"},
output{0x0001, DataType(0x0006), 0x0005, []byte{0x11, 0x12, 0x13, 0x14, 0x15}},
},
//////////// int (2-byte) types ////////////////
tagTest{
input{"0001", "0003", "00000002", "11111212", ""},
input{"0100", "0300", "02000000", "11111212", ""},
output{0x0001, DataType(0x0003), 0x0002, []byte{0x11, 0x11, 0x12, 0x12}},
},
tagTest{
input{"0001", "0003", "00000003", "00000010", "111213141516"},
input{"0100", "0300", "03000000", "10000000", "111213141516"},
output{0x0001, DataType(0x0003), 0x0003, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16}},
},
tagTest{
input{"0001", "0008", "00000001", "11120000", ""},
input{"0100", "0800", "01000000", "11120000", ""},
output{0x0001, DataType(0x0008), 0x0001, []byte{0x11, 0x12}},
},
tagTest{
input{"0001", "0008", "00000003", "00000100", "111213141516"},
input{"0100", "0800", "03000000", "00100000", "111213141516"},
output{0x0001, DataType(0x0008), 0x0003, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16}},
},
//////////// int (4-byte) types ////////////////
tagTest{
input{"0001", "0004", "00000001", "11121314", ""},
input{"0100", "0400", "01000000", "11121314", ""},
output{0x0001, DataType(0x0004), 0x0001, []byte{0x11, 0x12, 0x13, 0x14}},
},
tagTest{
input{"0001", "0004", "00000002", "00000010", "1112131415161718"},
input{"0100", "0400", "02000000", "10000000", "1112131415161718"},
output{0x0001, DataType(0x0004), 0x0002, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18}},
},
tagTest{
input{"0001", "0009", "00000001", "11121314", ""},
input{"0100", "0900", "01000000", "11121314", ""},
output{0x0001, DataType(0x0009), 0x0001, []byte{0x11, 0x12, 0x13, 0x14}},
},
tagTest{
input{"0001", "0009", "00000002", "00000011", "1112131415161819"},
input{"0100", "0900", "02000000", "11000000", "1112131415161819"},
output{0x0001, DataType(0x0009), 0x0002, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18, 0x19}},
},
//////////// rational types ////////////////////
tagTest{
input{"0001", "0005", "00000001", "00000010", "1112131415161718"},
input{"0100", "0500", "01000000", "10000000", "1112131415161718"},
output{0x0001, DataType(0x0005), 0x0001, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18}},
},
tagTest{
input{"0001", "000A", "00000001", "00000011", "1112131415161819"},
input{"0100", "0A00", "01000000", "11000000", "1112131415161819"},
output{0x0001, DataType(0x000A), 0x0001, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18, 0x19}},
},
//////////// float types ///////////////////////
tagTest{
input{"0001", "0005", "00000001", "00000010", "1112131415161718"},
input{"0100", "0500", "01000000", "10000000", "1112131415161718"},
output{0x0001, DataType(0x0005), 0x0001, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18}},
},
tagTest{
input{"0101", "000A", "00000001", "00000011", "1112131415161819"},
input{"0101", "0A00", "01000000", "11000000", "1112131415161819"},
output{0x0101, DataType(0x000A), 0x0001, []byte{0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18, 0x19}},
},
}
func TestDecodeTag(t *testing.T) {
for i, tst := range set1 {
testSingle(t, binary.BigEndian, tst.big, tst.out, i)
testSingle(t, binary.LittleEndian, tst.little, tst.out, i)
}
}
func testSingle(t *testing.T, order binary.ByteOrder, in input, out output, i int) {
data := buildInput(in, order)
buf := bytes.NewReader(data)
tg, err := DecodeTag(buf, order)
if err != nil {
t.Errorf("(%v) tag %v%+v decode failed: %v", order, i, in, err)
return
}
if tg.Id != out.id {
t.Errorf("(%v) tag %v id decode: expected %v, got %v", order, i, out.id, tg.Id)
}
if tg.Type != out.typ {
t.Errorf("(%v) tag %v type decode: expected %v, got %v", order, i, out.typ, tg.Type)
}
if tg.Count != out.count {
t.Errorf("(%v) tag %v component count decode: expected %v, got %v", order, i, out.count, tg.Count)
}
if !bytes.Equal(tg.Val, out.val) {
t.Errorf("(%v) tag %v value decode: expected %v, got %v", order, i, out.val, tg.Val)
}
}
// buildInputBig creates a byte-slice based on big-endian ordered input
func buildInput(in input, order binary.ByteOrder) []byte {
data := make([]byte, 0)
d, _ := hex.DecodeString(in.tgId)
data = append(data, d...)
d, _ = hex.DecodeString(in.tpe)
data = append(data, d...)
d, _ = hex.DecodeString(in.nVals)
data = append(data, d...)
d, _ = hex.DecodeString(in.offset)
data = append(data, d...)
if in.val != "" {
off := order.Uint32(d)
for i := 0; i < int(off)-12; i++ {
data = append(data, 0xFF)
}
d, _ = hex.DecodeString(in.val)
data = append(data, d...)
}
return data
}
func TestDecode(t *testing.T) {
name := filepath.Join(*dataDir, "sample1.tif")
f, err := os.Open(name)
if err != nil {
t.Fatalf("%v\n", err)
}
tif, err := Decode(f)
if err != nil {
t.Fatal(err)
}
t.Log(tif)
}
func TestDecodeTag_blob(t *testing.T) {
buf := bytes.NewReader(data())
buf.Seek(10, 1)
tg, err := DecodeTag(buf, binary.LittleEndian)
if err != nil {
t.Fatalf("tag decode failed: %v", err)
}
t.Logf("tag: %v+\n", tg)
n, d, err := tg.Rat2(0)
if err != nil {
t.Fatalf("tag decoded wrong type: %v", err)
}
t.Logf("tag rat val: %v/%v\n", n, d)
}
func data() []byte {
s1 := "49492A000800000002001A0105000100"
s1 += "00002600000069870400010000001102"
s1 += "0000000000004800000001000000"
dat, err := hex.DecodeString(s1)
if err != nil {
panic("invalid string fixture")
}
return dat
}
|
