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-rw-r--r--BaseTools/Source/C/BrotliCompress/enc/context.h184
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diff --git a/BaseTools/Source/C/BrotliCompress/enc/context.h b/BaseTools/Source/C/BrotliCompress/enc/context.h
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--- a/BaseTools/Source/C/BrotliCompress/enc/context.h
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@@ -1,184 +0,0 @@
-/* Copyright 2013 Google Inc. All Rights Reserved.
-
- Distributed under MIT license.
- See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
-*/
-
-/* Functions to map previous bytes into a context id. */
-
-#ifndef BROTLI_ENC_CONTEXT_H_
-#define BROTLI_ENC_CONTEXT_H_
-
-#include "../common/types.h"
-#include "../common/port.h"
-
-#if defined(__cplusplus) || defined(c_plusplus)
-extern "C" {
-#endif
-
-/* Second-order context lookup table for UTF8 byte streams.
-
- If p1 and p2 are the previous two bytes, we calculate the context as
-
- context = kUTF8ContextLookup[p1] | kUTF8ContextLookup[p2 + 256].
-
- If the previous two bytes are ASCII characters (i.e. < 128), this will be
- equivalent to
-
- context = 4 * context1(p1) + context2(p2),
-
- where context1 is based on the previous byte in the following way:
-
- 0 : non-ASCII control
- 1 : \t, \n, \r
- 2 : space
- 3 : other punctuation
- 4 : " '
- 5 : %
- 6 : ( < [ {
- 7 : ) > ] }
- 8 : , ; :
- 9 : .
- 10 : =
- 11 : number
- 12 : upper-case vowel
- 13 : upper-case consonant
- 14 : lower-case vowel
- 15 : lower-case consonant
-
- and context2 is based on the second last byte:
-
- 0 : control, space
- 1 : punctuation
- 2 : upper-case letter, number
- 3 : lower-case letter
-
- If the last byte is ASCII, and the second last byte is not (in a valid UTF8
- stream it will be a continuation byte, value between 128 and 191), the
- context is the same as if the second last byte was an ASCII control or space.
-
- If the last byte is a UTF8 lead byte (value >= 192), then the next byte will
- be a continuation byte and the context id is 2 or 3 depending on the LSB of
- the last byte and to a lesser extent on the second last byte if it is ASCII.
-
- If the last byte is a UTF8 continuation byte, the second last byte can be:
- - continuation byte: the next byte is probably ASCII or lead byte (assuming
- 4-byte UTF8 characters are rare) and the context id is 0 or 1.
- - lead byte (192 - 207): next byte is ASCII or lead byte, context is 0 or 1
- - lead byte (208 - 255): next byte is continuation byte, context is 2 or 3
-
- The possible value combinations of the previous two bytes, the range of
- context ids and the type of the next byte is summarized in the table below:
-
- |--------\-----------------------------------------------------------------|
- | \ Last byte |
- | Second \---------------------------------------------------------------|
- | last byte \ ASCII | cont. byte | lead byte |
- | \ (0-127) | (128-191) | (192-) |
- |=============|===================|=====================|==================|
- | ASCII | next: ASCII/lead | not valid | next: cont. |
- | (0-127) | context: 4 - 63 | | context: 2 - 3 |
- |-------------|-------------------|---------------------|------------------|
- | cont. byte | next: ASCII/lead | next: ASCII/lead | next: cont. |
- | (128-191) | context: 4 - 63 | context: 0 - 1 | context: 2 - 3 |
- |-------------|-------------------|---------------------|------------------|
- | lead byte | not valid | next: ASCII/lead | not valid |
- | (192-207) | | context: 0 - 1 | |
- |-------------|-------------------|---------------------|------------------|
- | lead byte | not valid | next: cont. | not valid |
- | (208-) | | context: 2 - 3 | |
- |-------------|-------------------|---------------------|------------------|
-*/
-static const uint8_t kUTF8ContextLookup[512] = {
- /* Last byte. */
- /* */
- /* ASCII range. */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 0, 4, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 8, 12, 16, 12, 12, 20, 12, 16, 24, 28, 12, 12, 32, 12, 36, 12,
- 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 32, 32, 24, 40, 28, 12,
- 12, 48, 52, 52, 52, 48, 52, 52, 52, 48, 52, 52, 52, 52, 52, 48,
- 52, 52, 52, 52, 52, 48, 52, 52, 52, 52, 52, 24, 12, 28, 12, 12,
- 12, 56, 60, 60, 60, 56, 60, 60, 60, 56, 60, 60, 60, 60, 60, 56,
- 60, 60, 60, 60, 60, 56, 60, 60, 60, 60, 60, 24, 12, 28, 12, 0,
- /* UTF8 continuation byte range. */
- 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
- 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
- 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
- 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1,
- /* UTF8 lead byte range. */
- 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
- 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
- 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
- 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3,
- /* Second last byte. */
- /* */
- /* ASCII range. */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1,
- 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1,
- 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 0,
- /* UTF8 continuation byte range. */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /* UTF8 lead byte range. */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-};
-
-/* Context lookup table for small signed integers. */
-static const uint8_t kSigned3BitContextLookup[] = {
- 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7,
-};
-
-typedef enum ContextType {
- CONTEXT_LSB6 = 0,
- CONTEXT_MSB6 = 1,
- CONTEXT_UTF8 = 2,
- CONTEXT_SIGNED = 3
-} ContextType;
-
-static BROTLI_INLINE uint8_t Context(uint8_t p1, uint8_t p2, ContextType mode) {
- switch (mode) {
- case CONTEXT_LSB6:
- return p1 & 0x3f;
- case CONTEXT_MSB6:
- return (uint8_t)(p1 >> 2);
- case CONTEXT_UTF8:
- return kUTF8ContextLookup[p1] | kUTF8ContextLookup[p2 + 256];
- case CONTEXT_SIGNED:
- return (uint8_t)((kSigned3BitContextLookup[p1] << 3) +
- kSigned3BitContextLookup[p2]);
- default:
- return 0;
- }
-}
-
-#if defined(__cplusplus) || defined(c_plusplus)
-} /* extern "C" */
-#endif
-
-#endif /* BROTLI_ENC_CONTEXT_H_ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-19 04:25:28 +0000