Make pread and DataView const.

GitOrigin-RevId: 4267ba93a1e83be55361c9f284f717151eb740cd

1 files changed, 9 insertions, 9 deletions

diff --git a/td/telegram/SecureStorage.cpp b/td/telegram/SecureStorage.cpp
index 0f9b4e163..f0b441693 100644
--- a/td/telegram/SecureStorage.cpp
+++ b/td/telegram/SecureStorage.cpp
@@ -51,7 +51,7 @@ AesCbcState calc_aes_cbc_state_sha512(Slice seed) {
 }
 
 template <class F>
-static Status data_view_for_each(DataView &data, F &&f) {
+static Status data_view_for_each(const DataView &data, F &&f) {
   const int64 step = 128 << 10;
   for (int64 i = 0, size = data.size(); i < size; i += step) {
     TRY_RESULT(bytes, data.pread(i, min(step, size - i)));
@@ -60,7 +60,7 @@ static Status data_view_for_each(DataView &data, F &&f) {
   return Status::OK();
 }
 
-Result<ValueHash> calc_value_hash(DataView &data_view) {
+Result<ValueHash> calc_value_hash(const DataView &data_view) {
   Sha256State state;
   sha256_init(&state);
   data_view_for_each(data_view, [&state](BufferSlice bytes) {
@@ -93,7 +93,7 @@ int64 FileDataView::size() const {
   return size_;
 }
 
-Result<BufferSlice> FileDataView::pread(int64 offset, int64 size) {
+Result<BufferSlice> FileDataView::pread(int64 offset, int64 size) const {
   auto slice = BufferSlice(narrow_cast<size_t>(size));
   TRY_RESULT(actual_size, fd_.pread(slice.as_slice(), offset));
   if (static_cast<int64>(actual_size) != size) {
@@ -109,7 +109,7 @@ int64 BufferSliceDataView::size() const {
   return narrow_cast<int64>(buffer_slice_.size());
 }
 
-Result<BufferSlice> BufferSliceDataView::pread(int64 offset, int64 size) {
+Result<BufferSlice> BufferSliceDataView::pread(int64 offset, int64 size) const {
   auto end_offset = size + offset;
   if (this->size() < end_offset) {
     return Status::Error("Not enough data in BufferSlice");
@@ -117,20 +117,20 @@ Result<BufferSlice> BufferSliceDataView::pread(int64 offset, int64 size) {
   return BufferSlice(buffer_slice_.as_slice().substr(narrow_cast<size_t>(offset), narrow_cast<size_t>(size)));
 }
 
-ConcatDataView::ConcatDataView(DataView &left, DataView &right) : left_(left), right_(right) {
+ConcatDataView::ConcatDataView(const DataView &left, const DataView &right) : left_(left), right_(right) {
 }
 
 int64 ConcatDataView::size() const {
   return left_.size() + right_.size();
 }
 
-Result<BufferSlice> ConcatDataView::pread(int64 offset, int64 size) {
+Result<BufferSlice> ConcatDataView::pread(int64 offset, int64 size) const {
   auto end_offset = size + offset;
   if (this->size() < end_offset) {
     return Status::Error("Not enough data in ConcatDataView");
   }
 
-  auto substr = [](DataView &slice, int64 offset, int64 size) -> Result<BufferSlice> {
+  auto substr = [](const DataView &slice, int64 offset, int64 size) -> Result<BufferSlice> {
     auto l = max(int64{0}, offset);
     auto r = min(slice.size(), offset + size);
     if (l >= r) {
@@ -302,7 +302,7 @@ Result<ValueHash> Decryptor::finish() {
   return ValueHash{res};
 }
 
-Encryptor::Encryptor(AesCbcState aes_cbc_state, DataView &data_view)
+Encryptor::Encryptor(AesCbcState aes_cbc_state, const DataView &data_view)
     : aes_cbc_state_(std::move(aes_cbc_state)), data_view_(data_view) {
 }
 
@@ -310,7 +310,7 @@ int64 Encryptor::size() const {
   return data_view_.size();
 }
 
-Result<BufferSlice> Encryptor::pread(int64 offset, int64 size) {
+Result<BufferSlice> Encryptor::pread(int64 offset, int64 size) const {
   if (offset != current_offset_) {
     return Status::Error("Arbitrary offset is not supported");
   }