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Diffstat (limited to 'src/web/server/h2o/libh2o/deps/brotli/enc/transform.h')
-rw-r--r-- | src/web/server/h2o/libh2o/deps/brotli/enc/transform.h | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/src/web/server/h2o/libh2o/deps/brotli/enc/transform.h b/src/web/server/h2o/libh2o/deps/brotli/enc/transform.h deleted file mode 100644 index ffd7f4c04..000000000 --- a/src/web/server/h2o/libh2o/deps/brotli/enc/transform.h +++ /dev/null @@ -1,248 +0,0 @@ -/* Copyright 2010 Google Inc. All Rights Reserved. - - Distributed under MIT license. - See file LICENSE for detail or copy at https://opensource.org/licenses/MIT -*/ - -// Transformations on dictionary words. - -#ifndef BROTLI_ENC_TRANSFORM_H_ -#define BROTLI_ENC_TRANSFORM_H_ - -#include <string> - -#include "./dictionary.h" - -namespace brotli { - -enum WordTransformType { - kIdentity = 0, - kOmitLast1 = 1, - kOmitLast2 = 2, - kOmitLast3 = 3, - kOmitLast4 = 4, - kOmitLast5 = 5, - kOmitLast6 = 6, - kOmitLast7 = 7, - kOmitLast8 = 8, - kOmitLast9 = 9, - kUppercaseFirst = 10, - kUppercaseAll = 11, - kOmitFirst1 = 12, - kOmitFirst2 = 13, - kOmitFirst3 = 14, - kOmitFirst4 = 15, - kOmitFirst5 = 16, - kOmitFirst6 = 17, - kOmitFirst7 = 18, - kOmitFirst8 = 19, - kOmitFirst9 = 20 -}; - -struct Transform { - const char* prefix; - WordTransformType word_transform; - const char* suffix; -}; - -static const Transform kTransforms[] = { - { "", kIdentity, "" }, - { "", kIdentity, " " }, - { " ", kIdentity, " " }, - { "", kOmitFirst1, "" }, - { "", kUppercaseFirst, " " }, - { "", kIdentity, " the " }, - { " ", kIdentity, "" }, - { "s ", kIdentity, " " }, - { "", kIdentity, " of " }, - { "", kUppercaseFirst, "" }, - { "", kIdentity, " and " }, - { "", kOmitFirst2, "" }, - { "", kOmitLast1, "" }, - { ", ", kIdentity, " " }, - { "", kIdentity, ", " }, - { " ", kUppercaseFirst, " " }, - { "", kIdentity, " in " }, - { "", kIdentity, " to " }, - { "e ", kIdentity, " " }, - { "", kIdentity, "\"" }, - { "", kIdentity, "." }, - { "", kIdentity, "\">" }, - { "", kIdentity, "\n" }, - { "", kOmitLast3, "" }, - { "", kIdentity, "]" }, - { "", kIdentity, " for " }, - { "", kOmitFirst3, "" }, - { "", kOmitLast2, "" }, - { "", kIdentity, " a " }, - { "", kIdentity, " that " }, - { " ", kUppercaseFirst, "" }, - { "", kIdentity, ". " }, - { ".", kIdentity, "" }, - { " ", kIdentity, ", " }, - { "", kOmitFirst4, "" }, - { "", kIdentity, " with " }, - { "", kIdentity, "'" }, - { "", kIdentity, " from " }, - { "", kIdentity, " by " }, - { "", kOmitFirst5, "" }, - { "", kOmitFirst6, "" }, - { " the ", kIdentity, "" }, - { "", kOmitLast4, "" }, - { "", kIdentity, ". The " }, - { "", kUppercaseAll, "" }, - { "", kIdentity, " on " }, - { "", kIdentity, " as " }, - { "", kIdentity, " is " }, - { "", kOmitLast7, "" }, - { "", kOmitLast1, "ing " }, - { "", kIdentity, "\n\t" }, - { "", kIdentity, ":" }, - { " ", kIdentity, ". " }, - { "", kIdentity, "ed " }, - { "", kOmitFirst9, "" }, - { "", kOmitFirst7, "" }, - { "", kOmitLast6, "" }, - { "", kIdentity, "(" }, - { "", kUppercaseFirst, ", " }, - { "", kOmitLast8, "" }, - { "", kIdentity, " at " }, - { "", kIdentity, "ly " }, - { " the ", kIdentity, " of " }, - { "", kOmitLast5, "" }, - { "", kOmitLast9, "" }, - { " ", kUppercaseFirst, ", " }, - { "", kUppercaseFirst, "\"" }, - { ".", kIdentity, "(" }, - { "", kUppercaseAll, " " }, - { "", kUppercaseFirst, "\">" }, - { "", kIdentity, "=\"" }, - { " ", kIdentity, "." }, - { ".com/", kIdentity, "" }, - { " the ", kIdentity, " of the " }, - { "", kUppercaseFirst, "'" }, - { "", kIdentity, ". This " }, - { "", kIdentity, "," }, - { ".", kIdentity, " " }, - { "", kUppercaseFirst, "(" }, - { "", kUppercaseFirst, "." }, - { "", kIdentity, " not " }, - { " ", kIdentity, "=\"" }, - { "", kIdentity, "er " }, - { " ", kUppercaseAll, " " }, - { "", kIdentity, "al " }, - { " ", kUppercaseAll, "" }, - { "", kIdentity, "='" }, - { "", kUppercaseAll, "\"" }, - { "", kUppercaseFirst, ". " }, - { " ", kIdentity, "(" }, - { "", kIdentity, "ful " }, - { " ", kUppercaseFirst, ". " }, - { "", kIdentity, "ive " }, - { "", kIdentity, "less " }, - { "", kUppercaseAll, "'" }, - { "", kIdentity, "est " }, - { " ", kUppercaseFirst, "." }, - { "", kUppercaseAll, "\">" }, - { " ", kIdentity, "='" }, - { "", kUppercaseFirst, "," }, - { "", kIdentity, "ize " }, - { "", kUppercaseAll, "." }, - { "\xc2\xa0", kIdentity, "" }, - { " ", kIdentity, "," }, - { "", kUppercaseFirst, "=\"" }, - { "", kUppercaseAll, "=\"" }, - { "", kIdentity, "ous " }, - { "", kUppercaseAll, ", " }, - { "", kUppercaseFirst, "='" }, - { " ", kUppercaseFirst, "," }, - { " ", kUppercaseAll, "=\"" }, - { " ", kUppercaseAll, ", " }, - { "", kUppercaseAll, "," }, - { "", kUppercaseAll, "(" }, - { "", kUppercaseAll, ". " }, - { " ", kUppercaseAll, "." }, - { "", kUppercaseAll, "='" }, - { " ", kUppercaseAll, ". " }, - { " ", kUppercaseFirst, "=\"" }, - { " ", kUppercaseAll, "='" }, - { " ", kUppercaseFirst, "='" }, -}; - -static const size_t kNumTransforms = - sizeof(kTransforms) / sizeof(kTransforms[0]); - -static const size_t kOmitLastNTransforms[10] = { - 0, 12, 27, 23, 42, 63, 56, 48, 59, 64, -}; - -static size_t ToUpperCase(uint8_t *p, size_t len) { - if (len == 1 || p[0] < 0xc0) { - if (p[0] >= 'a' && p[0] <= 'z') { - p[0] ^= 32; - } - return 1; - } - if (p[0] < 0xe0) { - p[1] ^= 32; - return 2; - } - if (len == 2) { - return 2; - } - p[2] ^= 5; - return 3; -} - -inline std::string TransformWord( - WordTransformType transform_type, const uint8_t* word, size_t len) { - if (transform_type <= kOmitLast9) { - if (len <= transform_type) { - return std::string(); - } - return std::string(word, word + len - transform_type); - } - - if (transform_type >= kOmitFirst1) { - const size_t skip = transform_type - (kOmitFirst1 - 1); - if (len <= skip) { - return std::string(); - } - return std::string(word + skip, word + len); - } - - std::string ret = std::string(word, word + len); - uint8_t *uppercase = reinterpret_cast<uint8_t*>(&ret[0]); - if (transform_type == kUppercaseFirst) { - ToUpperCase(uppercase, len); - } else if (transform_type == kUppercaseAll) { - size_t position = 0; - while (position < len) { - size_t step = ToUpperCase(uppercase, len - position); - uppercase += step; - position += step; - } - } - return ret; -} - -inline std::string ApplyTransform( - const Transform& t, const uint8_t* word, size_t len) { - return std::string(t.prefix) + - TransformWord(t.word_transform, word, len) + std::string(t.suffix); -} - -inline std::string GetTransformedDictionaryWord(size_t len_code, - size_t word_id) { - size_t num_words = 1u << kBrotliDictionarySizeBitsByLength[len_code]; - size_t offset = kBrotliDictionaryOffsetsByLength[len_code]; - size_t t = word_id / num_words; - size_t word_idx = word_id % num_words; - offset += len_code * word_idx; - const uint8_t* word = &kBrotliDictionary[offset]; - return ApplyTransform(kTransforms[t], word, len_code); -} - -} // namespace brotli - -#endif // BROTLI_ENC_TRANSFORM_H_ |