LCOV - code coverage report
Current view: top level - src - streams.cpp (source / functions) Coverage Total Hit
Test: fuzz_coverage.info Lines: 90.1 % 71 64
Test Date: 2025-04-25 04:10:03 Functions: 81.8 % 11 9
Branches: 67.9 % 106 72

             Branch data     Line data    Source code
       1                 :             : // Copyright (c) 2009-present The Bitcoin Core developers
       2                 :             : // Distributed under the MIT software license, see the accompanying
       3                 :             : // file COPYING or https://opensource.org/license/mit/.
       4                 :             : 
       5                 :             : #include <memusage.h>
       6                 :             : #include <span.h>
       7                 :             : #include <streams.h>
       8                 :             : #include <util/fs_helpers.h>
       9                 :             : 
      10                 :             : #include <array>
      11                 :             : 
      12                 :      147411 : AutoFile::AutoFile(std::FILE* file, std::vector<std::byte> data_xor)
      13         [ +  + ]:      147411 :     : m_file{file}, m_xor{std::move(data_xor)}
      14                 :             : {
      15         [ +  + ]:      147411 :     if (!IsNull()) {
      16         [ +  - ]:      133839 :         auto pos{std::ftell(m_file)};
      17         [ +  + ]:      133839 :         if (pos >= 0) m_position = pos;
      18                 :             :     }
      19                 :      147411 : }
      20                 :             : 
      21                 :    17117961 : std::size_t AutoFile::detail_fread(std::span<std::byte> dst)
      22                 :             : {
      23   [ +  +  +  - ]:    17117961 :     if (!m_file) throw std::ios_base::failure("AutoFile::read: file handle is nullptr");
      24         [ +  - ]:    17117586 :     size_t ret = std::fread(dst.data(), 1, dst.size(), m_file);
      25         [ +  + ]:    17117586 :     if (!m_xor.empty()) {
      26   [ +  +  +  - ]:      442506 :         if (!m_position.has_value()) throw std::ios_base::failure("AutoFile::read: position unknown");
      27         [ -  + ]:      442320 :         util::Xor(dst.subspan(0, ret), m_xor, *m_position);
      28                 :             :     }
      29         [ +  + ]:    17117400 :     if (m_position.has_value()) *m_position += ret;
      30                 :    17117400 :     return ret;
      31                 :             : }
      32                 :             : 
      33                 :         126 : void AutoFile::seek(int64_t offset, int origin)
      34                 :             : {
      35         [ -  + ]:         126 :     if (IsNull()) {
      36         [ #  # ]:           0 :         throw std::ios_base::failure("AutoFile::seek: file handle is nullptr");
      37                 :             :     }
      38         [ -  + ]:         126 :     if (std::fseek(m_file, offset, origin) != 0) {
      39   [ #  #  #  # ]:           0 :         throw std::ios_base::failure(feof() ? "AutoFile::seek: end of file" : "AutoFile::seek: fseek failed");
      40                 :             :     }
      41         [ +  + ]:         126 :     if (origin == SEEK_SET) {
      42                 :          55 :         m_position = offset;
      43   [ +  +  +  - ]:          71 :     } else if (origin == SEEK_CUR && m_position.has_value()) {
      44                 :          37 :         *m_position += offset;
      45                 :             :     } else {
      46                 :          34 :         int64_t r{std::ftell(m_file)};
      47         [ -  + ]:          34 :         if (r < 0) {
      48         [ #  # ]:           0 :             throw std::ios_base::failure("AutoFile::seek: ftell failed");
      49                 :             :         }
      50                 :          34 :         m_position = r;
      51                 :             :     }
      52                 :         126 : }
      53                 :             : 
      54                 :          34 : int64_t AutoFile::tell()
      55                 :             : {
      56   [ -  +  -  - ]:          34 :     if (!m_position.has_value()) throw std::ios_base::failure("AutoFile::tell: position unknown");
      57                 :          34 :     return *m_position;
      58                 :             : }
      59                 :             : 
      60                 :    16857538 : void AutoFile::read(std::span<std::byte> dst)
      61                 :             : {
      62         [ +  + ]:    16857538 :     if (detail_fread(dst) != dst.size()) {
      63   [ +  +  +  - ]:        2397 :         throw std::ios_base::failure(feof() ? "AutoFile::read: end of file" : "AutoFile::read: fread failed");
      64                 :             :     }
      65                 :    16855157 : }
      66                 :             : 
      67                 :         805 : void AutoFile::ignore(size_t nSize)
      68                 :             : {
      69   [ +  +  +  - ]:         805 :     if (!m_file) throw std::ios_base::failure("AutoFile::ignore: file handle is nullptr");
      70                 :             :     unsigned char data[4096];
      71         [ +  + ]:        1477 :     while (nSize > 0) {
      72         [ +  + ]:        1083 :         size_t nNow = std::min<size_t>(nSize, sizeof(data));
      73   [ -  +  +  + ]:        2166 :         if (std::fread(data, 1, nNow, m_file) != nNow) {
      74   [ +  +  +  - ]:         431 :             throw std::ios_base::failure(feof() ? "AutoFile::ignore: end of file" : "AutoFile::ignore: fread failed");
      75                 :             :         }
      76                 :         781 :         nSize -= nNow;
      77         [ +  + ]:         781 :         if (m_position.has_value()) *m_position += nNow;
      78                 :             :     }
      79                 :         394 : }
      80                 :             : 
      81                 :      626697 : void AutoFile::write(std::span<const std::byte> src)
      82                 :             : {
      83   [ +  +  +  - ]:      626697 :     if (!m_file) throw std::ios_base::failure("AutoFile::write: file handle is nullptr");
      84         [ +  + ]:      626051 :     if (m_xor.empty()) {
      85         [ +  + ]:      612848 :         if (std::fwrite(src.data(), 1, src.size(), m_file) != src.size()) {
      86         [ +  - ]:        1511 :             throw std::ios_base::failure("AutoFile::write: write failed");
      87                 :             :         }
      88         [ +  + ]:      611337 :         if (m_position.has_value()) *m_position += src.size();
      89                 :             :     } else {
      90                 :             :         std::array<std::byte, 4096> buf;
      91         [ +  + ]:       26053 :         while (src.size()) {
      92         [ +  - ]:       26162 :             auto buf_now{std::span{buf}.first(std::min<size_t>(src.size(), buf.size()))};
      93                 :       13081 :             std::copy_n(src.begin(), buf_now.size(), buf_now.begin());
      94                 :       13081 :             write_buffer(buf_now);
      95                 :       12850 :             src = src.subspan(buf_now.size());
      96                 :             :         }
      97                 :             :     }
      98                 :      624309 : }
      99                 :             : 
     100                 :      135739 : void AutoFile::write_buffer(std::span<std::byte> src)
     101                 :             : {
     102   [ -  +  -  - ]:      135739 :     if (!m_file) throw std::ios_base::failure("AutoFile::write_buffer: file handle is nullptr");
     103         [ +  - ]:      135739 :     if (m_xor.size()) {
     104   [ +  +  +  - ]:      135739 :         if (!m_position) throw std::ios_base::failure("AutoFile::write_buffer: obfuscation position unknown");
     105                 :      135616 :         util::Xor(src, m_xor, *m_position); // obfuscate in-place
     106                 :             :     }
     107         [ +  + ]:      135616 :     if (std::fwrite(src.data(), 1, src.size(), m_file) != src.size()) {
     108         [ +  - ]:         108 :         throw std::ios_base::failure("AutoFile::write_buffer: write failed");
     109                 :             :     }
     110         [ +  - ]:      135508 :     if (m_position) *m_position += src.size();
     111                 :      135508 : }
     112                 :             : 
     113                 :           0 : bool AutoFile::Commit()
     114                 :             : {
     115                 :           0 :     return ::FileCommit(m_file);
     116                 :             : }
     117                 :             : 
     118                 :           0 : bool AutoFile::Truncate(unsigned size)
     119                 :             : {
     120                 :           0 :     return ::TruncateFile(m_file, size);
     121                 :             : }
     122                 :             : 
     123                 :      165956 : size_t DataStream::GetMemoryUsage() const noexcept
     124                 :             : {
     125         [ +  + ]:      165956 :     return sizeof(*this) + memusage::DynamicUsage(vch);
     126                 :             : }
        

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