1// Update with any zlib constants that are added or changed in the future.
2// Node v6 didn't export this, so we just hard code the version and rely
3// on all the other hard-coded values from zlib v4736.  When node v6
4// support drops, we can just export the realZlibConstants object.
5const realZlibConstants = require('zlib').constants ||
6  /* istanbul ignore next */ { ZLIB_VERNUM: 4736 }
7
8module.exports = Object.freeze(Object.assign(Object.create(null), {
9  Z_NO_FLUSH: 0,
10  Z_PARTIAL_FLUSH: 1,
11  Z_SYNC_FLUSH: 2,
12  Z_FULL_FLUSH: 3,
13  Z_FINISH: 4,
14  Z_BLOCK: 5,
15  Z_OK: 0,
16  Z_STREAM_END: 1,
17  Z_NEED_DICT: 2,
18  Z_ERRNO: -1,
19  Z_STREAM_ERROR: -2,
20  Z_DATA_ERROR: -3,
21  Z_MEM_ERROR: -4,
22  Z_BUF_ERROR: -5,
23  Z_VERSION_ERROR: -6,
24  Z_NO_COMPRESSION: 0,
25  Z_BEST_SPEED: 1,
26  Z_BEST_COMPRESSION: 9,
27  Z_DEFAULT_COMPRESSION: -1,
28  Z_FILTERED: 1,
29  Z_HUFFMAN_ONLY: 2,
30  Z_RLE: 3,
31  Z_FIXED: 4,
32  Z_DEFAULT_STRATEGY: 0,
33  DEFLATE: 1,
34  INFLATE: 2,
35  GZIP: 3,
36  GUNZIP: 4,
37  DEFLATERAW: 5,
38  INFLATERAW: 6,
39  UNZIP: 7,
40  BROTLI_DECODE: 8,
41  BROTLI_ENCODE: 9,
42  Z_MIN_WINDOWBITS: 8,
43  Z_MAX_WINDOWBITS: 15,
44  Z_DEFAULT_WINDOWBITS: 15,
45  Z_MIN_CHUNK: 64,
46  Z_MAX_CHUNK: Infinity,
47  Z_DEFAULT_CHUNK: 16384,
48  Z_MIN_MEMLEVEL: 1,
49  Z_MAX_MEMLEVEL: 9,
50  Z_DEFAULT_MEMLEVEL: 8,
51  Z_MIN_LEVEL: -1,
52  Z_MAX_LEVEL: 9,
53  Z_DEFAULT_LEVEL: -1,
54  BROTLI_OPERATION_PROCESS: 0,
55  BROTLI_OPERATION_FLUSH: 1,
56  BROTLI_OPERATION_FINISH: 2,
57  BROTLI_OPERATION_EMIT_METADATA: 3,
58  BROTLI_MODE_GENERIC: 0,
59  BROTLI_MODE_TEXT: 1,
60  BROTLI_MODE_FONT: 2,
61  BROTLI_DEFAULT_MODE: 0,
62  BROTLI_MIN_QUALITY: 0,
63  BROTLI_MAX_QUALITY: 11,
64  BROTLI_DEFAULT_QUALITY: 11,
65  BROTLI_MIN_WINDOW_BITS: 10,
66  BROTLI_MAX_WINDOW_BITS: 24,
67  BROTLI_LARGE_MAX_WINDOW_BITS: 30,
68  BROTLI_DEFAULT_WINDOW: 22,
69  BROTLI_MIN_INPUT_BLOCK_BITS: 16,
70  BROTLI_MAX_INPUT_BLOCK_BITS: 24,
71  BROTLI_PARAM_MODE: 0,
72  BROTLI_PARAM_QUALITY: 1,
73  BROTLI_PARAM_LGWIN: 2,
74  BROTLI_PARAM_LGBLOCK: 3,
75  BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING: 4,
76  BROTLI_PARAM_SIZE_HINT: 5,
77  BROTLI_PARAM_LARGE_WINDOW: 6,
78  BROTLI_PARAM_NPOSTFIX: 7,
79  BROTLI_PARAM_NDIRECT: 8,
80  BROTLI_DECODER_RESULT_ERROR: 0,
81  BROTLI_DECODER_RESULT_SUCCESS: 1,
82  BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT: 2,
83  BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT: 3,
84  BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION: 0,
85  BROTLI_DECODER_PARAM_LARGE_WINDOW: 1,
86  BROTLI_DECODER_NO_ERROR: 0,
87  BROTLI_DECODER_SUCCESS: 1,
88  BROTLI_DECODER_NEEDS_MORE_INPUT: 2,
89  BROTLI_DECODER_NEEDS_MORE_OUTPUT: 3,
90  BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE: -1,
91  BROTLI_DECODER_ERROR_FORMAT_RESERVED: -2,
92  BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE: -3,
93  BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET: -4,
94  BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME: -5,
95  BROTLI_DECODER_ERROR_FORMAT_CL_SPACE: -6,
96  BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE: -7,
97  BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT: -8,
98  BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1: -9,
99  BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2: -10,
100  BROTLI_DECODER_ERROR_FORMAT_TRANSFORM: -11,
101  BROTLI_DECODER_ERROR_FORMAT_DICTIONARY: -12,
102  BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS: -13,
103  BROTLI_DECODER_ERROR_FORMAT_PADDING_1: -14,
104  BROTLI_DECODER_ERROR_FORMAT_PADDING_2: -15,
105  BROTLI_DECODER_ERROR_FORMAT_DISTANCE: -16,
106  BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET: -19,
107  BROTLI_DECODER_ERROR_INVALID_ARGUMENTS: -20,
108  BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES: -21,
109  BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS: -22,
110  BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP: -25,
111  BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1: -26,
112  BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2: -27,
113  BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES: -30,
114  BROTLI_DECODER_ERROR_UNREACHABLE: -31,
115}, realZlibConstants))
116