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annotate src/http/v2/ngx_http_v2_huff_encode.c @ 7660:d33e17499088

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Version bump.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 26 May 2020 22:03:00 +0300
parents dcfe355dfda4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
6246
257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
parents:
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1
257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
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2 /*
257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
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3 * Copyright (C) Nginx, Inc.
257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
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4 * Copyright (C) Valentin V. Bartenev
6395
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5 * Copyright (C) 2015 Vlad Krasnov
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257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
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6 */
257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
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7
257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
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diff changeset
8
257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
Valentin Bartenev <vbart@nginx.com>
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9 #include <ngx_config.h>
257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
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10 #include <ngx_core.h>
257b51c37c5a The HTTP/2 implementation (RFC 7240, 7241).
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11 #include <ngx_http.h>
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12
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13
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14 typedef struct {
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15 uint32_t code;
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16 uint32_t len;
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17 } ngx_http_v2_huff_encode_code_t;
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18
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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19
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20 static ngx_http_v2_huff_encode_code_t ngx_http_v2_huff_encode_table[256] =
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21 {
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22 {0x00001ff8, 13}, {0x007fffd8, 23}, {0x0fffffe2, 28}, {0x0fffffe3, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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23 {0x0fffffe4, 28}, {0x0fffffe5, 28}, {0x0fffffe6, 28}, {0x0fffffe7, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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24 {0x0fffffe8, 28}, {0x00ffffea, 24}, {0x3ffffffc, 30}, {0x0fffffe9, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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25 {0x0fffffea, 28}, {0x3ffffffd, 30}, {0x0fffffeb, 28}, {0x0fffffec, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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26 {0x0fffffed, 28}, {0x0fffffee, 28}, {0x0fffffef, 28}, {0x0ffffff0, 28},
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27 {0x0ffffff1, 28}, {0x0ffffff2, 28}, {0x3ffffffe, 30}, {0x0ffffff3, 28},
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28 {0x0ffffff4, 28}, {0x0ffffff5, 28}, {0x0ffffff6, 28}, {0x0ffffff7, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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29 {0x0ffffff8, 28}, {0x0ffffff9, 28}, {0x0ffffffa, 28}, {0x0ffffffb, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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30 {0x00000014, 6}, {0x000003f8, 10}, {0x000003f9, 10}, {0x00000ffa, 12},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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31 {0x00001ff9, 13}, {0x00000015, 6}, {0x000000f8, 8}, {0x000007fa, 11},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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32 {0x000003fa, 10}, {0x000003fb, 10}, {0x000000f9, 8}, {0x000007fb, 11},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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33 {0x000000fa, 8}, {0x00000016, 6}, {0x00000017, 6}, {0x00000018, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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34 {0x00000000, 5}, {0x00000001, 5}, {0x00000002, 5}, {0x00000019, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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35 {0x0000001a, 6}, {0x0000001b, 6}, {0x0000001c, 6}, {0x0000001d, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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36 {0x0000001e, 6}, {0x0000001f, 6}, {0x0000005c, 7}, {0x000000fb, 8},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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37 {0x00007ffc, 15}, {0x00000020, 6}, {0x00000ffb, 12}, {0x000003fc, 10},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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38 {0x00001ffa, 13}, {0x00000021, 6}, {0x0000005d, 7}, {0x0000005e, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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39 {0x0000005f, 7}, {0x00000060, 7}, {0x00000061, 7}, {0x00000062, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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40 {0x00000063, 7}, {0x00000064, 7}, {0x00000065, 7}, {0x00000066, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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41 {0x00000067, 7}, {0x00000068, 7}, {0x00000069, 7}, {0x0000006a, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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42 {0x0000006b, 7}, {0x0000006c, 7}, {0x0000006d, 7}, {0x0000006e, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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43 {0x0000006f, 7}, {0x00000070, 7}, {0x00000071, 7}, {0x00000072, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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44 {0x000000fc, 8}, {0x00000073, 7}, {0x000000fd, 8}, {0x00001ffb, 13},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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45 {0x0007fff0, 19}, {0x00001ffc, 13}, {0x00003ffc, 14}, {0x00000022, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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46 {0x00007ffd, 15}, {0x00000003, 5}, {0x00000023, 6}, {0x00000004, 5},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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47 {0x00000024, 6}, {0x00000005, 5}, {0x00000025, 6}, {0x00000026, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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48 {0x00000027, 6}, {0x00000006, 5}, {0x00000074, 7}, {0x00000075, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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49 {0x00000028, 6}, {0x00000029, 6}, {0x0000002a, 6}, {0x00000007, 5},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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50 {0x0000002b, 6}, {0x00000076, 7}, {0x0000002c, 6}, {0x00000008, 5},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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51 {0x00000009, 5}, {0x0000002d, 6}, {0x00000077, 7}, {0x00000078, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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52 {0x00000079, 7}, {0x0000007a, 7}, {0x0000007b, 7}, {0x00007ffe, 15},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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53 {0x000007fc, 11}, {0x00003ffd, 14}, {0x00001ffd, 13}, {0x0ffffffc, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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54 {0x000fffe6, 20}, {0x003fffd2, 22}, {0x000fffe7, 20}, {0x000fffe8, 20},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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55 {0x003fffd3, 22}, {0x003fffd4, 22}, {0x003fffd5, 22}, {0x007fffd9, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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56 {0x003fffd6, 22}, {0x007fffda, 23}, {0x007fffdb, 23}, {0x007fffdc, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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57 {0x007fffdd, 23}, {0x007fffde, 23}, {0x00ffffeb, 24}, {0x007fffdf, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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58 {0x00ffffec, 24}, {0x00ffffed, 24}, {0x003fffd7, 22}, {0x007fffe0, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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59 {0x00ffffee, 24}, {0x007fffe1, 23}, {0x007fffe2, 23}, {0x007fffe3, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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60 {0x007fffe4, 23}, {0x001fffdc, 21}, {0x003fffd8, 22}, {0x007fffe5, 23},
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61 {0x003fffd9, 22}, {0x007fffe6, 23}, {0x007fffe7, 23}, {0x00ffffef, 24},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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62 {0x003fffda, 22}, {0x001fffdd, 21}, {0x000fffe9, 20}, {0x003fffdb, 22},
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63 {0x003fffdc, 22}, {0x007fffe8, 23}, {0x007fffe9, 23}, {0x001fffde, 21},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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64 {0x007fffea, 23}, {0x003fffdd, 22}, {0x003fffde, 22}, {0x00fffff0, 24},
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65 {0x001fffdf, 21}, {0x003fffdf, 22}, {0x007fffeb, 23}, {0x007fffec, 23},
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66 {0x001fffe0, 21}, {0x001fffe1, 21}, {0x003fffe0, 22}, {0x001fffe2, 21},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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67 {0x007fffed, 23}, {0x003fffe1, 22}, {0x007fffee, 23}, {0x007fffef, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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68 {0x000fffea, 20}, {0x003fffe2, 22}, {0x003fffe3, 22}, {0x003fffe4, 22},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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69 {0x007ffff0, 23}, {0x003fffe5, 22}, {0x003fffe6, 22}, {0x007ffff1, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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70 {0x03ffffe0, 26}, {0x03ffffe1, 26}, {0x000fffeb, 20}, {0x0007fff1, 19},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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71 {0x003fffe7, 22}, {0x007ffff2, 23}, {0x003fffe8, 22}, {0x01ffffec, 25},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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72 {0x03ffffe2, 26}, {0x03ffffe3, 26}, {0x03ffffe4, 26}, {0x07ffffde, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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73 {0x07ffffdf, 27}, {0x03ffffe5, 26}, {0x00fffff1, 24}, {0x01ffffed, 25},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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74 {0x0007fff2, 19}, {0x001fffe3, 21}, {0x03ffffe6, 26}, {0x07ffffe0, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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75 {0x07ffffe1, 27}, {0x03ffffe7, 26}, {0x07ffffe2, 27}, {0x00fffff2, 24},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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76 {0x001fffe4, 21}, {0x001fffe5, 21}, {0x03ffffe8, 26}, {0x03ffffe9, 26},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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77 {0x0ffffffd, 28}, {0x07ffffe3, 27}, {0x07ffffe4, 27}, {0x07ffffe5, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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78 {0x000fffec, 20}, {0x00fffff3, 24}, {0x000fffed, 20}, {0x001fffe6, 21},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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79 {0x003fffe9, 22}, {0x001fffe7, 21}, {0x001fffe8, 21}, {0x007ffff3, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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80 {0x003fffea, 22}, {0x003fffeb, 22}, {0x01ffffee, 25}, {0x01ffffef, 25},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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81 {0x00fffff4, 24}, {0x00fffff5, 24}, {0x03ffffea, 26}, {0x007ffff4, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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82 {0x03ffffeb, 26}, {0x07ffffe6, 27}, {0x03ffffec, 26}, {0x03ffffed, 26},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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83 {0x07ffffe7, 27}, {0x07ffffe8, 27}, {0x07ffffe9, 27}, {0x07ffffea, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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84 {0x07ffffeb, 27}, {0x0ffffffe, 28}, {0x07ffffec, 27}, {0x07ffffed, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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85 {0x07ffffee, 27}, {0x07ffffef, 27}, {0x07fffff0, 27}, {0x03ffffee, 26}
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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86 };
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87
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88
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89 /* same as above, but embeds lowercase transformation */
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90 static ngx_http_v2_huff_encode_code_t ngx_http_v2_huff_encode_table_lc[256] =
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91 {
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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92 {0x00001ff8, 13}, {0x007fffd8, 23}, {0x0fffffe2, 28}, {0x0fffffe3, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
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diff changeset
93 {0x0fffffe4, 28}, {0x0fffffe5, 28}, {0x0fffffe6, 28}, {0x0fffffe7, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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diff changeset
94 {0x0fffffe8, 28}, {0x00ffffea, 24}, {0x3ffffffc, 30}, {0x0fffffe9, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
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diff changeset
95 {0x0fffffea, 28}, {0x3ffffffd, 30}, {0x0fffffeb, 28}, {0x0fffffec, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
96 {0x0fffffed, 28}, {0x0fffffee, 28}, {0x0fffffef, 28}, {0x0ffffff0, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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diff changeset
97 {0x0ffffff1, 28}, {0x0ffffff2, 28}, {0x3ffffffe, 30}, {0x0ffffff3, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
98 {0x0ffffff4, 28}, {0x0ffffff5, 28}, {0x0ffffff6, 28}, {0x0ffffff7, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
99 {0x0ffffff8, 28}, {0x0ffffff9, 28}, {0x0ffffffa, 28}, {0x0ffffffb, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
100 {0x00000014, 6}, {0x000003f8, 10}, {0x000003f9, 10}, {0x00000ffa, 12},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
101 {0x00001ff9, 13}, {0x00000015, 6}, {0x000000f8, 8}, {0x000007fa, 11},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
102 {0x000003fa, 10}, {0x000003fb, 10}, {0x000000f9, 8}, {0x000007fb, 11},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
103 {0x000000fa, 8}, {0x00000016, 6}, {0x00000017, 6}, {0x00000018, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
104 {0x00000000, 5}, {0x00000001, 5}, {0x00000002, 5}, {0x00000019, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
105 {0x0000001a, 6}, {0x0000001b, 6}, {0x0000001c, 6}, {0x0000001d, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
106 {0x0000001e, 6}, {0x0000001f, 6}, {0x0000005c, 7}, {0x000000fb, 8},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
107 {0x00007ffc, 15}, {0x00000020, 6}, {0x00000ffb, 12}, {0x000003fc, 10},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
108 {0x00001ffa, 13}, {0x00000003, 5}, {0x00000023, 6}, {0x00000004, 5},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
109 {0x00000024, 6}, {0x00000005, 5}, {0x00000025, 6}, {0x00000026, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
110 {0x00000027, 6}, {0x00000006, 5}, {0x00000074, 7}, {0x00000075, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
111 {0x00000028, 6}, {0x00000029, 6}, {0x0000002a, 6}, {0x00000007, 5},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
112 {0x0000002b, 6}, {0x00000076, 7}, {0x0000002c, 6}, {0x00000008, 5},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
113 {0x00000009, 5}, {0x0000002d, 6}, {0x00000077, 7}, {0x00000078, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
114 {0x00000079, 7}, {0x0000007a, 7}, {0x0000007b, 7}, {0x00001ffb, 13},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
115 {0x0007fff0, 19}, {0x00001ffc, 13}, {0x00003ffc, 14}, {0x00000022, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
116 {0x00007ffd, 15}, {0x00000003, 5}, {0x00000023, 6}, {0x00000004, 5},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
117 {0x00000024, 6}, {0x00000005, 5}, {0x00000025, 6}, {0x00000026, 6},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
118 {0x00000027, 6}, {0x00000006, 5}, {0x00000074, 7}, {0x00000075, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
119 {0x00000028, 6}, {0x00000029, 6}, {0x0000002a, 6}, {0x00000007, 5},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
120 {0x0000002b, 6}, {0x00000076, 7}, {0x0000002c, 6}, {0x00000008, 5},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
121 {0x00000009, 5}, {0x0000002d, 6}, {0x00000077, 7}, {0x00000078, 7},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
122 {0x00000079, 7}, {0x0000007a, 7}, {0x0000007b, 7}, {0x00007ffe, 15},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
123 {0x000007fc, 11}, {0x00003ffd, 14}, {0x00001ffd, 13}, {0x0ffffffc, 28},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
124 {0x000fffe6, 20}, {0x003fffd2, 22}, {0x000fffe7, 20}, {0x000fffe8, 20},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
125 {0x003fffd3, 22}, {0x003fffd4, 22}, {0x003fffd5, 22}, {0x007fffd9, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
126 {0x003fffd6, 22}, {0x007fffda, 23}, {0x007fffdb, 23}, {0x007fffdc, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
127 {0x007fffdd, 23}, {0x007fffde, 23}, {0x00ffffeb, 24}, {0x007fffdf, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
128 {0x00ffffec, 24}, {0x00ffffed, 24}, {0x003fffd7, 22}, {0x007fffe0, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
129 {0x00ffffee, 24}, {0x007fffe1, 23}, {0x007fffe2, 23}, {0x007fffe3, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
130 {0x007fffe4, 23}, {0x001fffdc, 21}, {0x003fffd8, 22}, {0x007fffe5, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
131 {0x003fffd9, 22}, {0x007fffe6, 23}, {0x007fffe7, 23}, {0x00ffffef, 24},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
132 {0x003fffda, 22}, {0x001fffdd, 21}, {0x000fffe9, 20}, {0x003fffdb, 22},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
133 {0x003fffdc, 22}, {0x007fffe8, 23}, {0x007fffe9, 23}, {0x001fffde, 21},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
134 {0x007fffea, 23}, {0x003fffdd, 22}, {0x003fffde, 22}, {0x00fffff0, 24},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
135 {0x001fffdf, 21}, {0x003fffdf, 22}, {0x007fffeb, 23}, {0x007fffec, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
136 {0x001fffe0, 21}, {0x001fffe1, 21}, {0x003fffe0, 22}, {0x001fffe2, 21},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
137 {0x007fffed, 23}, {0x003fffe1, 22}, {0x007fffee, 23}, {0x007fffef, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
138 {0x000fffea, 20}, {0x003fffe2, 22}, {0x003fffe3, 22}, {0x003fffe4, 22},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
139 {0x007ffff0, 23}, {0x003fffe5, 22}, {0x003fffe6, 22}, {0x007ffff1, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
140 {0x03ffffe0, 26}, {0x03ffffe1, 26}, {0x000fffeb, 20}, {0x0007fff1, 19},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
141 {0x003fffe7, 22}, {0x007ffff2, 23}, {0x003fffe8, 22}, {0x01ffffec, 25},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
142 {0x03ffffe2, 26}, {0x03ffffe3, 26}, {0x03ffffe4, 26}, {0x07ffffde, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
143 {0x07ffffdf, 27}, {0x03ffffe5, 26}, {0x00fffff1, 24}, {0x01ffffed, 25},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
144 {0x0007fff2, 19}, {0x001fffe3, 21}, {0x03ffffe6, 26}, {0x07ffffe0, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
145 {0x07ffffe1, 27}, {0x03ffffe7, 26}, {0x07ffffe2, 27}, {0x00fffff2, 24},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
146 {0x001fffe4, 21}, {0x001fffe5, 21}, {0x03ffffe8, 26}, {0x03ffffe9, 26},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
147 {0x0ffffffd, 28}, {0x07ffffe3, 27}, {0x07ffffe4, 27}, {0x07ffffe5, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
148 {0x000fffec, 20}, {0x00fffff3, 24}, {0x000fffed, 20}, {0x001fffe6, 21},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
149 {0x003fffe9, 22}, {0x001fffe7, 21}, {0x001fffe8, 21}, {0x007ffff3, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
150 {0x003fffea, 22}, {0x003fffeb, 22}, {0x01ffffee, 25}, {0x01ffffef, 25},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
151 {0x00fffff4, 24}, {0x00fffff5, 24}, {0x03ffffea, 26}, {0x007ffff4, 23},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
152 {0x03ffffeb, 26}, {0x07ffffe6, 27}, {0x03ffffec, 26}, {0x03ffffed, 26},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
153 {0x07ffffe7, 27}, {0x07ffffe8, 27}, {0x07ffffe9, 27}, {0x07ffffea, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
154 {0x07ffffeb, 27}, {0x0ffffffe, 28}, {0x07ffffec, 27}, {0x07ffffed, 27},
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
155 {0x07ffffee, 27}, {0x07ffffef, 27}, {0x07fffff0, 27}, {0x03ffffee, 26}
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
156 };
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
157
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
158
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
159 #if (NGX_PTR_SIZE == 8)
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diff changeset
160
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
161 #if (NGX_HAVE_LITTLE_ENDIAN)
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diff changeset
162
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
163 #if (NGX_HAVE_GCC_BSWAP64)
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
164 #define ngx_http_v2_huff_encode_buf(dst, buf) \
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parents: 6246
diff changeset
165 (*(uint64_t *) (dst) = __builtin_bswap64(buf))
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parents: 6246
diff changeset
166 #else
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parents: 6246
diff changeset
167 #define ngx_http_v2_huff_encode_buf(dst, buf) \
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
168 ((dst)[0] = (u_char) ((buf) >> 56), \
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parents: 6246
diff changeset
169 (dst)[1] = (u_char) ((buf) >> 48), \
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
170 (dst)[2] = (u_char) ((buf) >> 40), \
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
171 (dst)[3] = (u_char) ((buf) >> 32), \
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
172 (dst)[4] = (u_char) ((buf) >> 24), \
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
173 (dst)[5] = (u_char) ((buf) >> 16), \
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
174 (dst)[6] = (u_char) ((buf) >> 8), \
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
175 (dst)[7] = (u_char) (buf))
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
176 #endif
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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diff changeset
177
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
178 #else /* !NGX_HAVE_LITTLE_ENDIAN */
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parents: 6246
diff changeset
179 #define ngx_http_v2_huff_encode_buf(dst, buf) \
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diff changeset
180 (*(uint64_t *) (dst) = (buf))
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
181 #endif
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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diff changeset
182
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
183 #else /* NGX_PTR_SIZE == 4 */
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diff changeset
184
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
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diff changeset
185 #define ngx_http_v2_huff_encode_buf(dst, buf) \
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parents: 6246
diff changeset
186 (*(uint32_t *) (dst) = htonl(buf))
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parents: 6246
diff changeset
187
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
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diff changeset
188 #endif
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
189
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
190
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
191 size_t
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
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diff changeset
192 ngx_http_v2_huff_encode(u_char *src, size_t len, u_char *dst, ngx_uint_t lower)
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Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
193 {
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
parents: 6246
diff changeset
194 u_char *end;
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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parents: 6246
diff changeset
195 size_t hlen;
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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diff changeset
196 ngx_uint_t buf, pending, code;
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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diff changeset
197 ngx_http_v2_huff_encode_code_t *table, *next;
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diff changeset
198
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
Valentin Bartenev <vbart@nginx.com>
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diff changeset
199 table = lower ? ngx_http_v2_huff_encode_table_lc
ba3c2ca21aa5 HTTP/2: implemented HPACK Huffman encoding for response headers.
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200 : ngx_http_v2_huff_encode_table;
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201 hlen = 0;
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202 buf = 0;
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203 pending = 0;
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204
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205 end = src + len;
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206
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207 while (src != end) {
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208 next = &table[*src++];
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209
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210 code = next->code;
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211 pending += next->len;
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212
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213 /* accumulate bits */
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214 if (pending < sizeof(buf) * 8) {
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215 buf |= code << (sizeof(buf) * 8 - pending);
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216 continue;
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217 }
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218
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219 if (hlen + sizeof(buf) >= len) {
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220 return 0;
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221 }
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222
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223 pending -= sizeof(buf) * 8;
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224
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225 buf |= code >> pending;
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226
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227 ngx_http_v2_huff_encode_buf(&dst[hlen], buf);
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228
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229 hlen += sizeof(buf);
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230
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231 buf = pending ? code << (sizeof(buf) * 8 - pending) : 0;
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232 }
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233
6396
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234 if (pending == 0) {
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235 return hlen;
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236 }
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237
6395
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238 buf |= (ngx_uint_t) -1 >> pending;
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239
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240 pending = ngx_align(pending, 8);
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241
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242 if (hlen + pending / 8 >= len) {
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243 return 0;
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244 }
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245
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246 buf >>= sizeof(buf) * 8 - pending;
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247
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248 do {
6395
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249 pending -= 8;
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250 dst[hlen++] = (u_char) (buf >> pending);
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251 } while (pending);
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252
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253 return hlen;
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254 }