forked from pandas-dev/pandas
-
Notifications
You must be signed in to change notification settings - Fork 3
/
sas_constants.py
147 lines (140 loc) · 4.91 KB
/
sas_constants.py
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
magic = (b"\x00\x00\x00\x00\x00\x00\x00\x00" +
b"\x00\x00\x00\x00\xc2\xea\x81\x60" +
b"\xb3\x14\x11\xcf\xbd\x92\x08\x00" +
b"\x09\xc7\x31\x8c\x18\x1f\x10\x11")
align_1_checker_value = b'3'
align_1_offset = 32
align_1_length = 1
align_1_value = 4
u64_byte_checker_value = b'3'
align_2_offset = 35
align_2_length = 1
align_2_value = 4
endianness_offset = 37
endianness_length = 1
platform_offset = 39
platform_length = 1
encoding_offset = 70
encoding_length = 1
dataset_offset = 92
dataset_length = 64
file_type_offset = 156
file_type_length = 8
date_created_offset = 164
date_created_length = 8
date_modified_offset = 172
date_modified_length = 8
header_size_offset = 196
header_size_length = 4
page_size_offset = 200
page_size_length = 4
page_count_offset = 204
page_count_length = 4
sas_release_offset = 216
sas_release_length = 8
sas_server_type_offset = 224
sas_server_type_length = 16
os_version_number_offset = 240
os_version_number_length = 16
os_maker_offset = 256
os_maker_length = 16
os_name_offset = 272
os_name_length = 16
page_bit_offset_x86 = 16
page_bit_offset_x64 = 32
subheader_pointer_length_x86 = 12
subheader_pointer_length_x64 = 24
page_type_offset = 0
page_type_length = 2
block_count_offset = 2
block_count_length = 2
subheader_count_offset = 4
subheader_count_length = 2
page_meta_type = 0
page_data_type = 256
page_amd_type = 1024
page_metc_type = 16384
page_comp_type = -28672
page_mix_types = [512, 640]
subheader_pointers_offset = 8
truncated_subheader_id = 1
compressed_subheader_id = 4
compressed_subheader_type = 1
text_block_size_length = 2
row_length_offset_multiplier = 5
row_count_offset_multiplier = 6
col_count_p1_multiplier = 9
col_count_p2_multiplier = 10
row_count_on_mix_page_offset_multiplier = 15
column_name_pointer_length = 8
column_name_text_subheader_offset = 0
column_name_text_subheader_length = 2
column_name_offset_offset = 2
column_name_offset_length = 2
column_name_length_offset = 4
column_name_length_length = 2
column_data_offset_offset = 8
column_data_length_offset = 8
column_data_length_length = 4
column_type_offset = 14
column_type_length = 1
column_format_text_subheader_index_offset = 22
column_format_text_subheader_index_length = 2
column_format_offset_offset = 24
column_format_offset_length = 2
column_format_length_offset = 26
column_format_length_length = 2
column_label_text_subheader_index_offset = 28
column_label_text_subheader_index_length = 2
column_label_offset_offset = 30
column_label_offset_length = 2
column_label_length_offset = 32
column_label_length_length = 2
rle_compression = b'SASYZCRL'
rdc_compression = b'SASYZCR2'
compression_literals = [rle_compression, rdc_compression]
# Incomplete list of encodings, using SAS nomenclature:
# http://support.sas.com/documentation/cdl/en/nlsref/61893/HTML/default/viewer.htm#a002607278.htm
encoding_names = {29: "latin1", 20: "utf-8", 33: "cyrillic", 60: "wlatin2",
61: "wcyrillic", 62: "wlatin1", 90: "ebcdic870"}
class index:
rowSizeIndex = 0
columnSizeIndex = 1
subheaderCountsIndex = 2
columnTextIndex = 3
columnNameIndex = 4
columnAttributesIndex = 5
formatAndLabelIndex = 6
columnListIndex = 7
dataSubheaderIndex = 8
subheader_signature_to_index = {
b"\xF7\xF7\xF7\xF7": index.rowSizeIndex,
b"\x00\x00\x00\x00\xF7\xF7\xF7\xF7": index.rowSizeIndex,
b"\xF7\xF7\xF7\xF7\x00\x00\x00\x00": index.rowSizeIndex,
b"\xF7\xF7\xF7\xF7\xFF\xFF\xFB\xFE": index.rowSizeIndex,
b"\xF6\xF6\xF6\xF6": index.columnSizeIndex,
b"\x00\x00\x00\x00\xF6\xF6\xF6\xF6": index.columnSizeIndex,
b"\xF6\xF6\xF6\xF6\x00\x00\x00\x00": index.columnSizeIndex,
b"\xF6\xF6\xF6\xF6\xFF\xFF\xFB\xFE": index.columnSizeIndex,
b"\x00\xFC\xFF\xFF": index.subheaderCountsIndex,
b"\xFF\xFF\xFC\x00": index.subheaderCountsIndex,
b"\x00\xFC\xFF\xFF\xFF\xFF\xFF\xFF": index.subheaderCountsIndex,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFC\x00": index.subheaderCountsIndex,
b"\xFD\xFF\xFF\xFF": index.columnTextIndex,
b"\xFF\xFF\xFF\xFD": index.columnTextIndex,
b"\xFD\xFF\xFF\xFF\xFF\xFF\xFF\xFF": index.columnTextIndex,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFD": index.columnTextIndex,
b"\xFF\xFF\xFF\xFF": index.columnNameIndex,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF": index.columnNameIndex,
b"\xFC\xFF\xFF\xFF": index.columnAttributesIndex,
b"\xFF\xFF\xFF\xFC": index.columnAttributesIndex,
b"\xFC\xFF\xFF\xFF\xFF\xFF\xFF\xFF": index.columnAttributesIndex,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFC": index.columnAttributesIndex,
b"\xFE\xFB\xFF\xFF": index.formatAndLabelIndex,
b"\xFF\xFF\xFB\xFE": index.formatAndLabelIndex,
b"\xFE\xFB\xFF\xFF\xFF\xFF\xFF\xFF": index.formatAndLabelIndex,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFB\xFE": index.formatAndLabelIndex,
b"\xFE\xFF\xFF\xFF": index.columnListIndex,
b"\xFF\xFF\xFF\xFE": index.columnListIndex,
b"\xFE\xFF\xFF\xFF\xFF\xFF\xFF\xFF": index.columnListIndex,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFE": index.columnListIndex}