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/* -*- Mode: C++ -*- */
static size_t CmpDifferentBlockBytes(const Block &a, const Block &b) {
size_t total = 0;
size_t i = 0;
size_t m = min(a.Size(), b.Size());
for (; i < m; i++) {
if (a[i] != b[i]) {
total++;
}
}
total += a.Size() - i;
total += b.Size() - i;
return total;
}
static xoff_t CmpDifferentBytes(const FileSpec &a, const FileSpec &b) {
Block block_a, block_b;
xoff_t total = 0;
typename FileSpec::iterator a_i(a), b_i(b);
for (; !a_i.Done() && !b_i.Done(); a_i.Next(), b_i.Next()) {
a_i.Get(&block_a);
b_i.Get(&block_b);
total += CmpDifferentBlockBytes(block_a, block_b);
}
for (; !a_i.Done(); a_i.Next()) {
total += a_i.BytesOnBlock();
}
for (; !b_i.Done(); b_i.Next()) {
total += b_i.BytesOnBlock();
}
return total;
}
static size_t CmpDifferentBlockBytesAtOffset(const Block &a,
const FileSpec &b_spec,
xoff_t offset) {
Block b;
size_t size = a.Size();
CHECK_LE(offset, b_spec.Size());
if (b_spec.Size() < offset + size) {
size = b_spec.Size() - offset;
}
b_spec.Get(&b, offset, size);
return CmpDifferentBlockBytes(a, b);
}
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