/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
#include "./transform.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
/* RFC 7932 transforms string data */
static const char kPrefixSuffix[217] =
"\1 \2, \10 of the \4 of \2s \1.\5 and \4 "
/* 0x _0 _2 __5 _E _3 _6 _8 _E */
"in \1\"\4 to \2\">\1\n\2. \1]\5 for \3 a \6 "
/* 2x _3_ _5 _A_ _D_ _F _2 _4 _A _E */
"that \1\'\6 with \6 from \4 by \1(\6. T"
/* 4x _5_ _7 _E _5 _A _C */
"he \4 on \4 as \4 is \4ing \2\n\t\1:\3ed "
/* 6x _3 _8 _D _2 _7_ _ _A _C */
"\2=\"\4 at \3ly \1,\2=\'\5.com/\7. This \5"
/* 8x _0 _ _3 _8 _C _E _ _1 _7 _F */
" not \3er \3al \4ful \4ive \5less \4es"
/* Ax _5 _9 _D _2 _7 _D */
"t \4ize \2\xc2\xa0\4ous \5 the \2e \0";
/* Cx _2 _7___ ___ _A _F _5 _8 */
static const uint16_t kPrefixSuffixMap[50] = {
0x00, 0x02, 0x05, 0x0E, 0x13, 0x16, 0x18, 0x1E, 0x23, 0x25,
0x2A, 0x2D, 0x2F, 0x32, 0x34, 0x3A, 0x3E, 0x45, 0x47, 0x4E,
0x55, 0x5A, 0x5C, 0x63, 0x68, 0x6D, 0x72, 0x77, 0x7A, 0x7C,
0x80, 0x83, 0x88, 0x8C, 0x8E, 0x91, 0x97, 0x9F, 0xA5, 0xA9,
0xAD, 0xB2, 0xB7, 0xBD, 0xC2, 0xC7, 0xCA, 0xCF, 0xD5, 0xD8
};
/* RFC 7932 transforms */
static const uint8_t kTransformsData[] = {
49, BROTLI_TRANSFORM_IDENTITY, 49,
49, BROTLI_TRANSFORM_IDENTITY, 0,
0, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_OMIT_FIRST_1, 49,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 0,
49, BROTLI_TRANSFORM_IDENTITY, 47,
0, BROTLI_TRANSFORM_IDENTITY, 49,
4, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_IDENTITY, 3,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 49,
49, BROTLI_TRANSFORM_IDENTITY, 6,
49, BROTLI_TRANSFORM_OMIT_FIRST_2, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_1, 49,
1, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_IDENTITY, 1,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 0,
49, BROTLI_TRANSFORM_IDENTITY, 7,
49, BROTLI_TRANSFORM_IDENTITY, 9,
48, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_IDENTITY, 8,
49, BROTLI_TRANSFORM_IDENTITY, 5,
49, BROTLI_TRANSFORM_IDENTITY, 10,
49, BROTLI_TRANSFORM_IDENTITY, 11,
49, BROTLI_TRANSFORM_OMIT_LAST_3, 49,
49, BROTLI_TRANSFORM_IDENTITY, 13,
49, BROTLI_TRANSFORM_IDENTITY, 14,
49, BROTLI_TRANSFORM_OMIT_FIRST_3, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_2, 49,
49, BROTLI_TRANSFORM_IDENTITY, 15,
49, BROTLI_TRANSFORM_IDENTITY, 16,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 49,
49, BROTLI_TRANSFORM_IDENTITY, 12,
5, BROTLI_TRANSFORM_IDENTITY, 49,
0, BROTLI_TRANSFORM_IDENTITY, 1,
49, BROTLI_TRANSFORM_OMIT_FIRST_4, 49,
49, BROTLI_TRANSFORM_IDENTITY, 18,
49, BROTLI_TRANSFORM_IDENTITY, 17,
49, BROTLI_TRANSFORM_IDENTITY, 19,
49, BROTLI_TRANSFORM_IDENTITY, 20,
49, BROTLI_TRANSFORM_OMIT_FIRST_5, 49,
49, BROTLI_TRANSFORM_OMIT_FIRST_6, 49,
47, BROTLI_TRANSFORM_IDENTITY, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_4, 49,
49, BROTLI_TRANSFORM_IDENTITY, 22,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 49,
49, BROTLI_TRANSFORM_IDENTITY, 23,
49, BROTLI_TRANSFORM_IDENTITY, 24,
49, BROTLI_TRANSFORM_IDENTITY, 25,
49, BROTLI_TRANSFORM_OMIT_LAST_7, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_1, 26,
49, BROTLI_TRANSFORM_IDENTITY, 27,
49, BROTLI_TRANSFORM_IDENTITY, 28,
0, BROTLI_TRANSFORM_IDENTITY, 12,
49, BROTLI_TRANSFORM_IDENTITY, 29,
49, BROTLI_TRANSFORM_OMIT_FIRST_9, 49,
49, BROTLI_TRANSFORM_OMIT_FIRST_7, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_6, 49,
49, BROTLI_TRANSFORM_IDENTITY, 21,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 1,
49, BROTLI_TRANSFORM_OMIT_LAST_8, 49,
49, BROTLI_TRANSFORM_IDENTITY, 31,
49, BROTLI_TRANSFORM_IDENTITY, 32,
47, BROTLI_TRANSFORM_IDENTITY, 3,
49, BROTLI_TRANSFORM_OMIT_LAST_5, 49,
49, BROTLI_TRANSFORM_OMIT_LAST_9, 49,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 1,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 8,
5, BROTLI_TRANSFORM_IDENTITY, 21,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 0,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 10,
49, BROTLI_TRANSFORM_IDENTITY, 30,
0, BROTLI_TRANSFORM_IDENTITY, 5,
35, BROTLI_TRANSFORM_IDENTITY, 49,
47, BROTLI_TRANSFORM_IDENTITY, 2,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 17,
49, BROTLI_TRANSFORM_IDENTITY, 36,
49, BROTLI_TRANSFORM_IDENTITY, 33,
5, BROTLI_TRANSFORM_IDENTITY, 0,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 21,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 5,
49, BROTLI_TRANSFORM_IDENTITY, 37,
0, BROTLI_TRANSFORM_IDENTITY, 30,
49, BROTLI_TRANSFORM_IDENTITY, 38,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 0,
49, BROTLI_TRANSFORM_IDENTITY, 39,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 49,
49, BROTLI_TRANSFORM_IDENTITY, 34,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 8,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 12,
0, BROTLI_TRANSFORM_IDENTITY, 21,
49, BROTLI_TRANSFORM_IDENTITY, 40,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 12,
49, BROTLI_TRANSFORM_IDENTITY, 41,
49, BROTLI_TRANSFORM_IDENTITY, 42,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 17,
49, BROTLI_TRANSFORM_IDENTITY, 43,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 5,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 10,
0, BROTLI_TRANSFORM_IDENTITY, 34,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 33,
49, BROTLI_TRANSFORM_IDENTITY, 44,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 5,
45, BROTLI_TRANSFORM_IDENTITY, 49,
0, BROTLI_TRANSFORM_IDENTITY, 33,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 30,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 30,
49, BROTLI_TRANSFORM_IDENTITY, 46,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 1,
49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 34,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 33,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 30,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 1,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 33,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 21,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 12,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 5,
49, BROTLI_TRANSFORM_UPPERCASE_ALL, 34,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 12,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 30,
0, BROTLI_TRANSFORM_UPPERCASE_ALL, 34,
0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 34,
};
static BrotliTransforms kBrotliTransforms = {
sizeof(kPrefixSuffix),
(const uint8_t*)kPrefixSuffix,
kPrefixSuffixMap,
sizeof(kTransformsData) / (3 * sizeof(kTransformsData[0])),
kTransformsData,
{0, 12, 27, 23, 42, 63, 56, 48, 59, 64}
};
const BrotliTransforms* BrotliGetTransforms(void) {
return &kBrotliTransforms;
}
static int ToUpperCase(uint8_t* p) {
if (p[0] < 0xC0) {
if (p[0] >= 'a' && p[0] <= 'z') {
p[0] ^= 32;
}
return 1;
}
/* An overly simplified uppercasing model for UTF-8. */
if (p[0] < 0xE0) {
p[1] ^= 32;
return 2;
}
/* An arbitrary transform for three byte characters. */
p[2] ^= 5;
return 3;
}
int BrotliTransformDictionaryWord(uint8_t* dst, const uint8_t* word, int len,
const BrotliTransforms* transforms, int transform_idx) {
int idx = 0;
const uint8_t* prefix = BROTLI_TRANSFORM_PREFIX(transforms, transform_idx);
uint8_t type = BROTLI_TRANSFORM_TYPE(transforms, transform_idx);
const uint8_t* suffix = BROTLI_TRANSFORM_SUFFIX(transforms, transform_idx);
{
int prefix_len = *prefix++;
while (prefix_len--) { dst[idx++] = *prefix++; }
}
{
const int t = type;
int i = 0;
if (t <= BROTLI_TRANSFORM_OMIT_LAST_9) {
len -= t;
} else if (t >= BROTLI_TRANSFORM_OMIT_FIRST_1
&& t <= BROTLI_TRANSFORM_OMIT_FIRST_9) {
int skip = t - (BROTLI_TRANSFORM_OMIT_FIRST_1 - 1);
word += skip;
len -= skip;
}
while (i < len) { dst[idx++] = word[i++]; }
if (t == BROTLI_TRANSFORM_UPPERCASE_FIRST) {
ToUpperCase(&dst[idx - len]);
} else if (t == BROTLI_TRANSFORM_UPPERCASE_ALL) {
uint8_t* uppercase = &dst[idx - len];
while (len > 0) {
int step = ToUpperCase(uppercase);
uppercase += step;
len -= step;
}
}
}
{
int suffix_len = *suffix++;
while (suffix_len--) { dst[idx++] = *suffix++; }
return idx;
}
}
#if defined(__cplusplus) || defined(c_plusplus)
} /* extern "C" */
#endif