1 files changed, 0 insertions, 311 deletions
diff --git a/chromium/net/disk_cache/bitmap.cc b/chromium/net/disk_cache/bitmap.cc
deleted file mode 100644
index 6d469dfe3dc..00000000000
--- a/chromium/net/disk_cache/bitmap.cc
+++ /dev/null
@@ -1,311 +0,0 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "net/disk_cache/bitmap.h"
-
-#include <algorithm>
-
-#include "base/logging.h"
-
-namespace {
-
-// Returns the number of trailing zeros.
-int FindLSBSetNonZero(uint32 word) {
-  // Get the LSB, put it on the exponent of a 32 bit float and remove the
-  // mantisa and the bias. This code requires IEEE 32 bit float compliance.
-  float f = static_cast<float>(word & -static_cast<int>(word));
-
-  // We use a union to go around strict-aliasing complains.
-  union {
-    float ieee_float;
-    uint32 as_uint;
-  } x;
-
-  x.ieee_float = f;
-  return (x.as_uint >> 23) - 0x7f;
-}
-
-// Returns the index of the first bit set to |value| from |word|. This code
-// assumes that we'll be able to find that bit.
-int FindLSBNonEmpty(uint32 word, bool value) {
-  // If we are looking for 0, negate |word| and look for 1.
-  if (!value)
-    word = ~word;
-
-  return FindLSBSetNonZero(word);
-}
-
-}  // namespace
-
-namespace disk_cache {
-
-Bitmap::Bitmap(int num_bits, bool clear_bits)
-    : num_bits_(num_bits),
-      array_size_(RequiredArraySize(num_bits)),
-      alloc_(true) {
-  map_ = new uint32[array_size_];
-
-  // Initialize all of the bits.
-  if (clear_bits)
-    Clear();
-}
-
-Bitmap::Bitmap(uint32* map, int num_bits, int num_words)
-    : map_(map),
-      num_bits_(num_bits),
-      // If size is larger than necessary, trim because array_size_ is used
-      // as a bound by various methods.
-      array_size_(std::min(RequiredArraySize(num_bits), num_words)),
-      alloc_(false) {
-}
-
-Bitmap::~Bitmap() {
-  if (alloc_)
-    delete [] map_;
-}
-
-void Bitmap::Resize(int num_bits, bool clear_bits) {
-  DCHECK(alloc_ || !map_);
-  const int old_maxsize = num_bits_;
-  const int old_array_size = array_size_;
-  array_size_ = RequiredArraySize(num_bits);
-
-  if (array_size_ != old_array_size) {
-    uint32* new_map = new uint32[array_size_];
-    // Always clear the unused bits in the last word.
-    new_map[array_size_ - 1] = 0;
-    memcpy(new_map, map_,
-           sizeof(*map_) * std::min(array_size_, old_array_size));
-    if (alloc_)
-      delete[] map_;  // No need to check for NULL.
-    map_ = new_map;
-    alloc_ = true;
-  }
-
-  num_bits_ = num_bits;
-  if (old_maxsize < num_bits_ && clear_bits) {
-    SetRange(old_maxsize, num_bits_, false);
-  }
-}
-
-void Bitmap::Set(int index, bool value) {
-  DCHECK_LT(index, num_bits_);
-  DCHECK_GE(index, 0);
-  const int i = index & (kIntBits - 1);
-  const int j = index / kIntBits;
-  if (value)
-    map_[j] |= (1 << i);
-  else
-    map_[j] &= ~(1 << i);
-}
-
-bool Bitmap::Get(int index) const {
-  DCHECK_LT(index, num_bits_);
-  DCHECK_GE(index, 0);
-  const int i = index & (kIntBits-1);
-  const int j = index / kIntBits;
-  return ((map_[j] & (1 << i)) != 0);
-}
-
-void Bitmap::Toggle(int index) {
-  DCHECK_LT(index, num_bits_);
-  DCHECK_GE(index, 0);
-  const int i = index & (kIntBits - 1);
-  const int j = index / kIntBits;
-  map_[j] ^= (1 << i);
-}
-
-void Bitmap::SetMapElement(int array_index, uint32 value) {
-  DCHECK_LT(array_index, array_size_);
-  DCHECK_GE(array_index, 0);
-  map_[array_index] = value;
-}
-
-uint32 Bitmap::GetMapElement(int array_index) const {
-  DCHECK_LT(array_index, array_size_);
-  DCHECK_GE(array_index, 0);
-  return map_[array_index];
-}
-
-void Bitmap::SetMap(const uint32* map, int size) {
-  memcpy(map_, map, std::min(size, array_size_) * sizeof(*map_));
-}
-
-void Bitmap::SetRange(int begin, int end, bool value) {
-  DCHECK_LE(begin, end);
-  int start_offset = begin & (kIntBits - 1);
-  if (start_offset) {
-    // Set the bits in the first word.
-    int len = std::min(end - begin, kIntBits - start_offset);
-    SetWordBits(begin, len, value);
-    begin += len;
-  }
-
-  if (begin == end)
-    return;
-
-  // Now set the bits in the last word.
-  int end_offset = end & (kIntBits - 1);
-  end -= end_offset;
-  SetWordBits(end, end_offset, value);
-
-  // Set all the words in the middle.
-  memset(map_ + (begin / kIntBits), (value ? 0xFF : 0x00),
-         ((end / kIntBits) - (begin / kIntBits)) * sizeof(*map_));
-}
-
-// Return true if any bit between begin inclusive and end exclusive
-// is set.  0 <= begin <= end <= bits() is required.
-bool Bitmap::TestRange(int begin, int end, bool value) const {
-  DCHECK_LT(begin, num_bits_);
-  DCHECK_LE(end, num_bits_);
-  DCHECK_LE(begin, end);
-  DCHECK_GE(begin, 0);
-  DCHECK_GE(end, 0);
-
-  // Return false immediately if the range is empty.
-  if (begin >= end || end <= 0)
-    return false;
-
-  // Calculate the indices of the words containing the first and last bits,
-  // along with the positions of the bits within those words.
-  int word = begin / kIntBits;
-  int offset = begin & (kIntBits - 1);
-  int last_word = (end - 1) / kIntBits;
-  int last_offset = (end - 1) & (kIntBits - 1);
-
-  // If we are looking for zeros, negate the data from the map.
-  uint32 this_word = map_[word];
-  if (!value)
-    this_word = ~this_word;
-
-  // If the range spans multiple words, discard the extraneous bits of the
-  // first word by shifting to the right, and then test the remaining bits.
-  if (word < last_word) {
-    if (this_word >> offset)
-      return true;
-    offset = 0;
-
-    word++;
-    // Test each of the "middle" words that lies completely within the range.
-    while (word < last_word) {
-      this_word = map_[word++];
-      if (!value)
-        this_word = ~this_word;
-      if (this_word)
-        return true;
-    }
-  }
-
-  // Test the portion of the last word that lies within the range. (This logic
-  // also handles the case where the entire range lies within a single word.)
-  const uint32 mask = ((2 << (last_offset - offset)) - 1) << offset;
-
-  this_word = map_[last_word];
-  if (!value)
-    this_word = ~this_word;
-
-  return (this_word & mask) != 0;
-}
-
-bool Bitmap::FindNextBit(int* index, int limit, bool value) const {
-  DCHECK_LT(*index, num_bits_);
-  DCHECK_LE(limit, num_bits_);
-  DCHECK_LE(*index, limit);
-  DCHECK_GE(*index, 0);
-  DCHECK_GE(limit, 0);
-
-  const int bit_index = *index;
-  if (bit_index >= limit || limit <= 0)
-    return false;
-
-  // From now on limit != 0, since if it was we would have returned false.
-  int word_index = bit_index >> kLogIntBits;
-  uint32 one_word = map_[word_index];
-
-  // Simple optimization where we can immediately return true if the first
-  // bit is set.  This helps for cases where many bits are set, and doesn't
-  // hurt too much if not.
-  if (Get(bit_index) == value)
-    return true;
-
-  const int first_bit_offset = bit_index & (kIntBits - 1);
-
-  // First word is special - we need to mask off leading bits.
-  uint32 mask = 0xFFFFFFFF << first_bit_offset;
-  if (value) {
-    one_word &= mask;
-  } else {
-    one_word |= ~mask;
-  }
-
-  uint32 empty_value = value ? 0 : 0xFFFFFFFF;
-
-  // Loop through all but the last word.  Note that 'limit' is one
-  // past the last bit we want to check, and we don't want to read
-  // past the end of "words".  E.g. if num_bits_ == 32 only words[0] is
-  // valid, so we want to avoid reading words[1] when limit == 32.
-  const int last_word_index = (limit - 1) >> kLogIntBits;
-  while (word_index < last_word_index) {
-    if (one_word != empty_value) {
-      *index = (word_index << kLogIntBits) + FindLSBNonEmpty(one_word, value);
-      return true;
-    }
-    one_word = map_[++word_index];
-  }
-
-  // Last word is special - we may need to mask off trailing bits.  Note that
-  // 'limit' is one past the last bit we want to check, and if limit is a
-  // multiple of 32 we want to check all bits in this word.
-  const int last_bit_offset = (limit - 1) & (kIntBits - 1);
-  mask = 0xFFFFFFFE << last_bit_offset;
-  if (value) {
-    one_word &= ~mask;
-  } else {
-    one_word |= mask;
-  }
-  if (one_word != empty_value) {
-    *index = (word_index << kLogIntBits) + FindLSBNonEmpty(one_word, value);
-    return true;
-  }
-  return false;
-}
-
-int Bitmap::FindBits(int* index, int limit, bool value) const {
-  DCHECK_LT(*index, num_bits_);
-  DCHECK_LE(limit, num_bits_);
-  DCHECK_LE(*index, limit);
-  DCHECK_GE(*index, 0);
-  DCHECK_GE(limit, 0);
-
-  if (!FindNextBit(index, limit, value))
-    return false;
-
-  // Now see how many bits have the same value.
-  int end = *index;
-  if (!FindNextBit(&end, limit, !value))
-    return limit - *index;
-
-  return end - *index;
-}
-
-void Bitmap::SetWordBits(int start, int len, bool value) {
-  DCHECK_LT(len, kIntBits);
-  DCHECK_GE(len, 0);
-  if (!len)
-    return;
-
-  int word = start / kIntBits;
-  int offset = start % kIntBits;
-
-  uint32 to_add = 0xffffffff << len;
-  to_add = (~to_add) << offset;
-  if (value) {
-    map_[word] |= to_add;
-  } else {
-    map_[word] &= ~to_add;
-  }
-}
-
-}  // namespace disk_cache