X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdeModulePkg%2FLibrary%2FBrotliCustomDecompressLib%2Fdec%2Fbit_reader.h;fp=MdeModulePkg%2FLibrary%2FBrotliCustomDecompressLib%2Fdec%2Fbit_reader.h;h=0000000000000000000000000000000000000000;hp=bf2b938dec8b48b5ca7ec3d397ece0f018545c59;hb=58802e02c41bd715a5d3586f4bf2a4b1c46e9274;hpb=8c654bb3ec0b5232dec2b2b07234c5479eb14d62

diff --git a/MdeModulePkg/Library/BrotliCustomDecompressLib/dec/bit_reader.h b/MdeModulePkg/Library/BrotliCustomDecompressLib/dec/bit_reader.h
deleted file mode 100644
index bf2b938dec..0000000000
--- a/MdeModulePkg/Library/BrotliCustomDecompressLib/dec/bit_reader.h
+++ /dev/null
@@ -1,309 +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
-*/
-
-/* Bit reading helpers */
-
-#ifndef BROTLI_DEC_BIT_READER_H_
-#define BROTLI_DEC_BIT_READER_H_
-
-//#include <string.h>  /* memcpy */
-
-#include "../common/platform.h"
-#include <brotli/types.h>
-
-#if defined(__cplusplus) || defined(c_plusplus)
-extern "C" {
-#endif
-
-#define BROTLI_SHORT_FILL_BIT_WINDOW_READ (sizeof(brotli_reg_t) >> 1)
-
-static const uint32_t kBitMask[33] = {  0x00000000,
-    0x00000001, 0x00000003, 0x00000007, 0x0000000F,
-    0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF,
-    0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF,
-    0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF,
-    0x0001FFFF, 0x0003FFFF, 0x0007FFFF, 0x000FFFFF,
-    0x001FFFFF, 0x003FFFFF, 0x007FFFFF, 0x00FFFFFF,
-    0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF,
-    0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF
-};
-
-static BROTLI_INLINE uint32_t BitMask(uint32_t n) {
-  if (BROTLI_IS_CONSTANT(n) || BROTLI_HAS_UBFX) {
-    /* Masking with this expression turns to a single
-       "Unsigned Bit Field Extract" UBFX instruction on ARM. */
-    return ~((0xFFFFFFFFu) << n);
-  } else {
-    return kBitMask[n];
-  }
-}
-
-typedef struct {
-  brotli_reg_t val_;       /* pre-fetched bits */
-  uint32_t bit_pos_;       /* current bit-reading position in val_ */
-  const uint8_t* next_in;  /* the byte we're reading from */
-  size_t avail_in;
-} BrotliBitReader;
-
-typedef struct {
-  brotli_reg_t val_;
-  uint32_t bit_pos_;
-  const uint8_t* next_in;
-  size_t avail_in;
-} BrotliBitReaderState;
-
-/* Initializes the BrotliBitReader fields. */
-BROTLI_INTERNAL void BrotliInitBitReader(BrotliBitReader* const br);
-
-/* Ensures that accumulator is not empty.
-   May consume up to sizeof(brotli_reg_t) - 1 bytes of input.
-   Returns BROTLI_FALSE if data is required but there is no input available.
-   For BROTLI_ALIGNED_READ this function also prepares bit reader for aligned
-   reading. */
-BROTLI_INTERNAL BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br);
-
-static BROTLI_INLINE void BrotliBitReaderSaveState(
-    BrotliBitReader* const from, BrotliBitReaderState* to) {
-  to->val_ = from->val_;
-  to->bit_pos_ = from->bit_pos_;
-  to->next_in = from->next_in;
-  to->avail_in = from->avail_in;
-}
-
-static BROTLI_INLINE void BrotliBitReaderRestoreState(
-    BrotliBitReader* const to, BrotliBitReaderState* from) {
-  to->val_ = from->val_;
-  to->bit_pos_ = from->bit_pos_;
-  to->next_in = from->next_in;
-  to->avail_in = from->avail_in;
-}
-
-static BROTLI_INLINE uint32_t BrotliGetAvailableBits(
-    const BrotliBitReader* br) {
-  return (BROTLI_64_BITS ? 64 : 32) - br->bit_pos_;
-}
-
-/* Returns amount of unread bytes the bit reader still has buffered from the
-   BrotliInput, including whole bytes in br->val_. */
-static BROTLI_INLINE size_t BrotliGetRemainingBytes(BrotliBitReader* br) {
-  return br->avail_in + (BrotliGetAvailableBits(br) >> 3);
-}
-
-/* Checks if there is at least |num| bytes left in the input ring-buffer
-   (excluding the bits remaining in br->val_). */
-static BROTLI_INLINE BROTLI_BOOL BrotliCheckInputAmount(
-    BrotliBitReader* const br, size_t num) {
-  return TO_BROTLI_BOOL(br->avail_in >= num);
-}
-
-/* Guarantees that there are at least |n_bits| + 1 bits in accumulator.
-   Precondition: accumulator contains at least 1 bit.
-   |n_bits| should be in the range [1..24] for regular build. For portable
-   non-64-bit little-endian build only 16 bits are safe to request. */
-static BROTLI_INLINE void BrotliFillBitWindow(
-    BrotliBitReader* const br, uint32_t n_bits) {
-#if (BROTLI_64_BITS)
-  if (!BROTLI_ALIGNED_READ && BROTLI_IS_CONSTANT(n_bits) && (n_bits <= 8)) {
-    if (br->bit_pos_ >= 56) {
-      br->val_ >>= 56;
-      br->bit_pos_ ^= 56;  /* here same as -= 56 because of the if condition */
-      br->val_ |= BROTLI_UNALIGNED_LOAD64LE(br->next_in) << 8;
-      br->avail_in -= 7;
-      br->next_in += 7;
-    }
-  } else if (
-      !BROTLI_ALIGNED_READ && BROTLI_IS_CONSTANT(n_bits) && (n_bits <= 16)) {
-    if (br->bit_pos_ >= 48) {
-      br->val_ >>= 48;
-      br->bit_pos_ ^= 48;  /* here same as -= 48 because of the if condition */
-      br->val_ |= BROTLI_UNALIGNED_LOAD64LE(br->next_in) << 16;
-      br->avail_in -= 6;
-      br->next_in += 6;
-    }
-  } else {
-    if (br->bit_pos_ >= 32) {
-      br->val_ >>= 32;
-      br->bit_pos_ ^= 32;  /* here same as -= 32 because of the if condition */
-      br->val_ |= ((uint64_t)BROTLI_UNALIGNED_LOAD32LE(br->next_in)) << 32;
-      br->avail_in -= BROTLI_SHORT_FILL_BIT_WINDOW_READ;
-      br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ;
-    }
-  }
-#else
-  if (!BROTLI_ALIGNED_READ && BROTLI_IS_CONSTANT(n_bits) && (n_bits <= 8)) {
-    if (br->bit_pos_ >= 24) {
-      br->val_ >>= 24;
-      br->bit_pos_ ^= 24;  /* here same as -= 24 because of the if condition */
-      br->val_ |= BROTLI_UNALIGNED_LOAD32LE(br->next_in) << 8;
-      br->avail_in -= 3;
-      br->next_in += 3;
-    }
-  } else {
-    if (br->bit_pos_ >= 16) {
-      br->val_ >>= 16;
-      br->bit_pos_ ^= 16;  /* here same as -= 16 because of the if condition */
-      br->val_ |= ((uint32_t)BROTLI_UNALIGNED_LOAD16LE(br->next_in)) << 16;
-      br->avail_in -= BROTLI_SHORT_FILL_BIT_WINDOW_READ;
-      br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ;
-    }
-  }
-#endif
-}
-
-/* Mostly like BrotliFillBitWindow, but guarantees only 16 bits and reads no
-   more than BROTLI_SHORT_FILL_BIT_WINDOW_READ bytes of input. */
-static BROTLI_INLINE void BrotliFillBitWindow16(BrotliBitReader* const br) {
-  BrotliFillBitWindow(br, 17);
-}
-
-/* Tries to pull one byte of input to accumulator.
-   Returns BROTLI_FALSE if there is no input available. */
-static BROTLI_INLINE BROTLI_BOOL BrotliPullByte(BrotliBitReader* const br) {
-  if (br->avail_in == 0) {
-    return BROTLI_FALSE;
-  }
-  br->val_ >>= 8;
-#if (BROTLI_64_BITS)
-  br->val_ |= ((uint64_t)*br->next_in) << 56;
-#else
-  br->val_ |= ((uint32_t)*br->next_in) << 24;
-#endif
-  br->bit_pos_ -= 8;
-  --br->avail_in;
-  ++br->next_in;
-  return BROTLI_TRUE;
-}
-
-/* Returns currently available bits.
-   The number of valid bits could be calculated by BrotliGetAvailableBits. */
-static BROTLI_INLINE brotli_reg_t BrotliGetBitsUnmasked(
-    BrotliBitReader* const br) {
-  return br->val_ >> br->bit_pos_;
-}
-
-/* Like BrotliGetBits, but does not mask the result.
-   The result contains at least 16 valid bits. */
-static BROTLI_INLINE uint32_t BrotliGet16BitsUnmasked(
-    BrotliBitReader* const br) {
-  BrotliFillBitWindow(br, 16);
-  return (uint32_t)BrotliGetBitsUnmasked(br);
-}
-
-/* Returns the specified number of bits from |br| without advancing bit
-   position. */
-static BROTLI_INLINE uint32_t BrotliGetBits(
-    BrotliBitReader* const br, uint32_t n_bits) {
-  BrotliFillBitWindow(br, n_bits);
-  return (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
-}
-
-/* Tries to peek the specified amount of bits. Returns BROTLI_FALSE, if there
-   is not enough input. */
-static BROTLI_INLINE BROTLI_BOOL BrotliSafeGetBits(
-    BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
-  while (BrotliGetAvailableBits(br) < n_bits) {
-    if (!BrotliPullByte(br)) {
-      return BROTLI_FALSE;
-    }
-  }
-  *val = (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
-  return BROTLI_TRUE;
-}
-
-/* Advances the bit pos by |n_bits|. */
-static BROTLI_INLINE void BrotliDropBits(
-    BrotliBitReader* const br, uint32_t n_bits) {
-  br->bit_pos_ += n_bits;
-}
-
-static BROTLI_INLINE void BrotliBitReaderUnload(BrotliBitReader* br) {
-  uint32_t unused_bytes = BrotliGetAvailableBits(br) >> 3;
-  uint32_t unused_bits = unused_bytes << 3;
-  br->avail_in += unused_bytes;
-  br->next_in -= unused_bytes;
-  if (unused_bits == sizeof(br->val_) << 3) {
-    br->val_ = 0;
-  } else {
-    br->val_ <<= unused_bits;
-  }
-  br->bit_pos_ += unused_bits;
-}
-
-/* Reads the specified number of bits from |br| and advances the bit pos.
-   Precondition: accumulator MUST contain at least |n_bits|. */
-static BROTLI_INLINE void BrotliTakeBits(
-  BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
-  *val = (uint32_t)BrotliGetBitsUnmasked(br) & BitMask(n_bits);
-  BROTLI_LOG(("[BrotliReadBits]  %d %d %d val: %6x\n",
-      (int)br->avail_in, (int)br->bit_pos_, (int)n_bits, (int)*val));
-  BrotliDropBits(br, n_bits);
-}
-
-/* Reads the specified number of bits from |br| and advances the bit pos.
-   Assumes that there is enough input to perform BrotliFillBitWindow. */
-static BROTLI_INLINE uint32_t BrotliReadBits(
-    BrotliBitReader* const br, uint32_t n_bits) {
-  if (BROTLI_64_BITS || (n_bits <= 16)) {
-    uint32_t val;
-    BrotliFillBitWindow(br, n_bits);
-    BrotliTakeBits(br, n_bits, &val);
-    return val;
-  } else {
-    uint32_t low_val;
-    uint32_t high_val;
-    BrotliFillBitWindow(br, 16);
-    BrotliTakeBits(br, 16, &low_val);
-    BrotliFillBitWindow(br, 8);
-    BrotliTakeBits(br, n_bits - 16, &high_val);
-    return low_val | (high_val << 16);
-  }
-}
-
-/* Tries to read the specified amount of bits. Returns BROTLI_FALSE, if there
-   is not enough input. |n_bits| MUST be positive. */
-static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits(
-    BrotliBitReader* const br, uint32_t n_bits, uint32_t* val) {
-  while (BrotliGetAvailableBits(br) < n_bits) {
-    if (!BrotliPullByte(br)) {
-      return BROTLI_FALSE;
-    }
-  }
-  BrotliTakeBits(br, n_bits, val);
-  return BROTLI_TRUE;
-}
-
-/* Advances the bit reader position to the next byte boundary and verifies
-   that any skipped bits are set to zero. */
-static BROTLI_INLINE BROTLI_BOOL BrotliJumpToByteBoundary(BrotliBitReader* br) {
-  uint32_t pad_bits_count = BrotliGetAvailableBits(br) & 0x7;
-  uint32_t pad_bits = 0;
-  if (pad_bits_count != 0) {
-    BrotliTakeBits(br, pad_bits_count, &pad_bits);
-  }
-  return TO_BROTLI_BOOL(pad_bits == 0);
-}
-
-/* Copies remaining input bytes stored in the bit reader to the output. Value
-   |num| may not be larger than BrotliGetRemainingBytes. The bit reader must be
-   warmed up again after this. */
-static BROTLI_INLINE void BrotliCopyBytes(uint8_t* dest,
-                                          BrotliBitReader* br, size_t num) {
-  while (BrotliGetAvailableBits(br) >= 8 && num > 0) {
-    *dest = (uint8_t)BrotliGetBitsUnmasked(br);
-    BrotliDropBits(br, 8);
-    ++dest;
-    --num;
-  }
-  memcpy(dest, br->next_in, num);
-  br->avail_in -= num;
-  br->next_in += num;
-}
-
-#if defined(__cplusplus) || defined(c_plusplus)
-}  /* extern "C" */
-#endif
-
-#endif  /* BROTLI_DEC_BIT_READER_H_ */