from __future__ import annotations
from typing import Final
magic: Final = (
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: Final = b"3"
align_1_offset: Final = 32
align_1_length: Final = 1
align_1_value: Final = 4
u64_byte_checker_value: Final = b"3"
align_2_offset: Final = 35
align_2_length: Final = 1
align_2_value: Final = 4
endianness_offset: Final = 37
endianness_length: Final = 1
platform_offset: Final = 39
platform_length: Final = 1
encoding_offset: Final = 70
encoding_length: Final = 1
dataset_offset: Final = 92
dataset_length: Final = 64
file_type_offset: Final = 156
file_type_length: Final = 8
date_created_offset: Final = 164
date_created_length: Final = 8
date_modified_offset: Final = 172
date_modified_length: Final = 8
header_size_offset: Final = 196
header_size_length: Final = 4
page_size_offset: Final = 200
page_size_length: Final = 4
page_count_offset: Final = 204
page_count_length: Final = 4
sas_release_offset: Final = 216
sas_release_length: Final = 8
sas_server_type_offset: Final = 224
sas_server_type_length: Final = 16
os_version_number_offset: Final = 240
os_version_number_length: Final = 16
os_maker_offset: Final = 256
os_maker_length: Final = 16
os_name_offset: Final = 272
os_name_length: Final = 16
page_bit_offset_x86: Final = 16
page_bit_offset_x64: Final = 32
subheader_pointer_length_x86: Final = 12
subheader_pointer_length_x64: Final = 24
page_type_offset: Final = 0
page_type_length: Final = 2
block_count_offset: Final = 2
block_count_length: Final = 2
subheader_count_offset: Final = 4
subheader_count_length: Final = 2
page_type_mask: Final = 0x0F00
# Keep "page_comp_type" bits
page_type_mask2: Final = 0xF000 | page_type_mask
page_meta_type: Final = 0x0000
page_data_type: Final = 0x0100
page_mix_type: Final = 0x0200
page_amd_type: Final = 0x0400
page_meta2_type: Final = 0x4000
page_comp_type: Final = 0x9000
page_meta_types: Final = [page_meta_type, page_meta2_type]
subheader_pointers_offset: Final = 8
truncated_subheader_id: Final = 1
compressed_subheader_id: Final = 4
compressed_subheader_type: Final = 1
text_block_size_length: Final = 2
row_length_offset_multiplier: Final = 5
row_count_offset_multiplier: Final = 6
col_count_p1_multiplier: Final = 9
col_count_p2_multiplier: Final = 10
row_count_on_mix_page_offset_multiplier: Final = 15
column_name_pointer_length: Final = 8
column_name_text_subheader_offset: Final = 0
column_name_text_subheader_length: Final = 2
column_name_offset_offset: Final = 2
column_name_offset_length: Final = 2
column_name_length_offset: Final = 4
column_name_length_length: Final = 2
column_data_offset_offset: Final = 8
column_data_length_offset: Final = 8
column_data_length_length: Final = 4
column_type_offset: Final = 14
column_type_length: Final = 1
column_format_text_subheader_index_offset: Final = 22
column_format_text_subheader_index_length: Final = 2
column_format_offset_offset: Final = 24
column_format_offset_length: Final = 2
column_format_length_offset: Final = 26
column_format_length_length: Final = 2
column_label_text_subheader_index_offset: Final = 28
column_label_text_subheader_index_length: Final = 2
column_label_offset_offset: Final = 30
column_label_offset_length: Final = 2
column_label_length_offset: Final = 32
column_label_length_length: Final = 2
rle_compression: Final = b"SASYZCRL"
rdc_compression: Final = b"SASYZCR2"
compression_literals: Final = [rle_compression, rdc_compression]
# Incomplete list of encodings, using SAS nomenclature:
# https://support.sas.com/documentation/onlinedoc/dfdmstudio/2.6/dmpdmsug/Content/dfU_Encodings_SAS.html
# corresponding to the Python documentation of standard encodings
# https://docs.python.org/3/library/codecs.html#standard-encodings
encoding_names: Final = {
20: "utf-8",
29: "latin1",
30: "latin2",
31: "latin3",
32: "latin4",
33: "cyrillic",
34: "arabic",
35: "greek",
36: "hebrew",
37: "latin5",
38: "latin6",
39: "cp874",
40: "latin9",
41: "cp437",
42: "cp850",
43: "cp852",
44: "cp857",
45: "cp858",
46: "cp862",
47: "cp864",
48: "cp865",
49: "cp866",
50: "cp869",
51: "cp874",
# 52: "", # not found
# 53: "", # not found
# 54: "", # not found
55: "cp720",
56: "cp737",
57: "cp775",
58: "cp860",
59: "cp863",
60: "cp1250",
61: "cp1251",
62: "cp1252",
63: "cp1253",
64: "cp1254",
65: "cp1255",
66: "cp1256",
67: "cp1257",
68: "cp1258",
118: "cp950",
# 119: "", # not found
123: "big5",
125: "gb2312",
126: "cp936",
134: "euc_jp",
136: "cp932",
138: "shift_jis",
140: "euc-kr",
141: "cp949",
227: "latin8",
# 228: "", # not found
# 229: "" # not found
}
class SASIndex:
row_size_index: Final = 0
column_size_index: Final = 1
subheader_counts_index: Final = 2
column_text_index: Final = 3
column_name_index: Final = 4
column_attributes_index: Final = 5
format_and_label_index: Final = 6
column_list_index: Final = 7
data_subheader_index: Final = 8
subheader_signature_to_index: Final = {
b"\xF7\xF7\xF7\xF7": SASIndex.row_size_index,
b"\x00\x00\x00\x00\xF7\xF7\xF7\xF7": SASIndex.row_size_index,
b"\xF7\xF7\xF7\xF7\x00\x00\x00\x00": SASIndex.row_size_index,
b"\xF7\xF7\xF7\xF7\xFF\xFF\xFB\xFE": SASIndex.row_size_index,
b"\xF6\xF6\xF6\xF6": SASIndex.column_size_index,
b"\x00\x00\x00\x00\xF6\xF6\xF6\xF6": SASIndex.column_size_index,
b"\xF6\xF6\xF6\xF6\x00\x00\x00\x00": SASIndex.column_size_index,
b"\xF6\xF6\xF6\xF6\xFF\xFF\xFB\xFE": SASIndex.column_size_index,
b"\x00\xFC\xFF\xFF": SASIndex.subheader_counts_index,
b"\xFF\xFF\xFC\x00": SASIndex.subheader_counts_index,
b"\x00\xFC\xFF\xFF\xFF\xFF\xFF\xFF": SASIndex.subheader_counts_index,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFC\x00": SASIndex.subheader_counts_index,
b"\xFD\xFF\xFF\xFF": SASIndex.column_text_index,
b"\xFF\xFF\xFF\xFD": SASIndex.column_text_index,
b"\xFD\xFF\xFF\xFF\xFF\xFF\xFF\xFF": SASIndex.column_text_index,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFD": SASIndex.column_text_index,
b"\xFF\xFF\xFF\xFF": SASIndex.column_name_index,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF": SASIndex.column_name_index,
b"\xFC\xFF\xFF\xFF": SASIndex.column_attributes_index,
b"\xFF\xFF\xFF\xFC": SASIndex.column_attributes_index,
b"\xFC\xFF\xFF\xFF\xFF\xFF\xFF\xFF": SASIndex.column_attributes_index,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFC": SASIndex.column_attributes_index,
b"\xFE\xFB\xFF\xFF": SASIndex.format_and_label_index,
b"\xFF\xFF\xFB\xFE": SASIndex.format_and_label_index,
b"\xFE\xFB\xFF\xFF\xFF\xFF\xFF\xFF": SASIndex.format_and_label_index,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFB\xFE": SASIndex.format_and_label_index,
b"\xFE\xFF\xFF\xFF": SASIndex.column_list_index,
b"\xFF\xFF\xFF\xFE": SASIndex.column_list_index,
b"\xFE\xFF\xFF\xFF\xFF\xFF\xFF\xFF": SASIndex.column_list_index,
b"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFE": SASIndex.column_list_index,
}
# List of frequently used SAS date and datetime formats
# http://support.sas.com/documentation/cdl/en/etsug/60372/HTML/default/viewer.htm#etsug_intervals_sect009.htm
# https://github.com/epam/parso/blob/master/src/main/java/com/epam/parso/impl/SasFileConstants.java
sas_date_formats: Final = (
"DATE",
"DAY",
"DDMMYY",
"DOWNAME",
"JULDAY",
"JULIAN",
"MMDDYY",
"MMYY",
"MMYYC",
"MMYYD",
"MMYYP",
"MMYYS",
"MMYYN",
"MONNAME",
"MONTH",
"MONYY",
"QTR",
"QTRR",
"NENGO",
"WEEKDATE",
"WEEKDATX",
"WEEKDAY",
"WEEKV",
"WORDDATE",
"WORDDATX",
"YEAR",
"YYMM",
"YYMMC",
"YYMMD",
"YYMMP",
"YYMMS",
"YYMMN",
"YYMON",
"YYMMDD",
"YYQ",
"YYQC",
"YYQD",
"YYQP",
"YYQS",
"YYQN",
"YYQR",
"YYQRC",
"YYQRD",
"YYQRP",
"YYQRS",
"YYQRN",
"YYMMDDP",
"YYMMDDC",
"E8601DA",
"YYMMDDN",
"MMDDYYC",
"MMDDYYS",
"MMDDYYD",
"YYMMDDS",
"B8601DA",
"DDMMYYN",
"YYMMDDD",
"DDMMYYB",
"DDMMYYP",
"MMDDYYP",
"YYMMDDB",
"MMDDYYN",
"DDMMYYC",
"DDMMYYD",
"DDMMYYS",
"MINGUO",
)
sas_datetime_formats: Final = (
"DATETIME",
"DTWKDATX",
"B8601DN",
"B8601DT",
"B8601DX",
"B8601DZ",
"B8601LX",
"E8601DN",
"E8601DT",
"E8601DX",
"E8601DZ",
"E8601LX",
"DATEAMPM",
"DTDATE",
"DTMONYY",
"DTMONYY",
"DTWKDATX",
"DTYEAR",
"TOD",
"MDYAMPM",
)