scripted-diff: Rename CBufferedFile to BufferedFile

While touching all constructors in the previous commit, the class name
can be adjusted to comply with the style guide.

-BEGIN VERIFY SCRIPT-
 sed -i 's/CBufferedFile/BufferedFile/g' $( git grep -l CBufferedFile )
-END VERIFY SCRIPT-

src/bench/streams_findbyte.cpp

@@ -16,7 +16,7 @@ static void FindByte(benchmark::Bench& bench)
     data[file_size-1] = 1;
     fwrite(&data, sizeof(uint8_t), file_size, file);
     rewind(file);
-    CBufferedFile bf{file, /*nBufSize=*/file_size + 1, /*nRewindIn=*/file_size, 0};
+    BufferedFile bf{file, /*nBufSize=*/file_size + 1, /*nRewindIn=*/file_size, 0};
 
     bench.run([&] {
         bf.SetPos(0);

src/streams.h

@@ -577,7 +577,7 @@ public:
  *  Will automatically close the file when it goes out of scope if not null.
  *  If you need to close the file early, use file.fclose() instead of fclose(file).
  */
-class CBufferedFile
+class BufferedFile
 {
 private:
     const int nVersion;
@@ -600,7 +600,7 @@ private:
             return false;
         size_t nBytes = fread((void*)&vchBuf[pos], 1, readNow, src);
         if (nBytes == 0) {
-            throw std::ios_base::failure(feof(src) ? "CBufferedFile::Fill: end of file" : "CBufferedFile::Fill: fread failed");
+            throw std::ios_base::failure(feof(src) ? "BufferedFile::Fill: end of file" : "BufferedFile::Fill: fread failed");
         }
         nSrcPos += nBytes;
         return true;
@@ -629,7 +629,7 @@ private:
     }
 
 public:
-    CBufferedFile(FILE* fileIn, uint64_t nBufSize, uint64_t nRewindIn, int nVersionIn)
+    BufferedFile(FILE* fileIn, uint64_t nBufSize, uint64_t nRewindIn, int nVersionIn)
         : nVersion{nVersionIn}, nReadLimit{std::numeric_limits<uint64_t>::max()}, nRewind{nRewindIn}, vchBuf(nBufSize, std::byte{0})
     {
         if (nRewindIn >= nBufSize)
@@ -637,14 +637,14 @@ public:
         src = fileIn;
     }
 
-    ~CBufferedFile()
+    ~BufferedFile()
     {
         fclose();
     }
 
     // Disallow copies
-    CBufferedFile(const CBufferedFile&) = delete;
+    BufferedFile(const BufferedFile&) = delete;
-    CBufferedFile& operator=(const CBufferedFile&) = delete;
+    BufferedFile& operator=(const BufferedFile&) = delete;
 
     int GetVersion() const { return nVersion; }
 
@@ -711,7 +711,7 @@ public:
     }
 
     template<typename T>
-    CBufferedFile& operator>>(T&& obj) {
+    BufferedFile& operator>>(T&& obj) {
         ::Unserialize(*this, obj);
         return (*this);
     }

src/test/fuzz/buffered_file.cpp

@@ -18,7 +18,7 @@ FUZZ_TARGET(buffered_file)
 {
     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
     FuzzedFileProvider fuzzed_file_provider = ConsumeFile(fuzzed_data_provider);
-    std::optional<CBufferedFile> opt_buffered_file;
+    std::optional<BufferedFile> opt_buffered_file;
     FILE* fuzzed_file = fuzzed_file_provider.open();
     try {
         opt_buffered_file.emplace(fuzzed_file, fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096), fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096), fuzzed_data_provider.ConsumeIntegral<int>());

src/test/streams_tests.cpp

@@ -260,7 +260,7 @@ BOOST_AUTO_TEST_CASE(streams_buffered_file)
     // The buffer size (second arg) must be greater than the rewind
     // amount (third arg).
     try {
-        CBufferedFile bfbad{file, 25, 25, 333};
+        BufferedFile bfbad{file, 25, 25, 333};
         BOOST_CHECK(false);
     } catch (const std::exception& e) {
         BOOST_CHECK(strstr(e.what(),
@@ -268,7 +268,7 @@ BOOST_AUTO_TEST_CASE(streams_buffered_file)
     }
 
     // The buffer is 25 bytes, allow rewinding 10 bytes.
-    CBufferedFile bf{file, 25, 10, 333};
+    BufferedFile bf{file, 25, 10, 333};
     BOOST_CHECK(!bf.eof());
 
     // This member has no functional effect.
@@ -356,7 +356,7 @@ BOOST_AUTO_TEST_CASE(streams_buffered_file)
         BOOST_CHECK(false);
     } catch (const std::exception& e) {
         BOOST_CHECK(strstr(e.what(),
-                        "CBufferedFile::Fill: end of file") != nullptr);
+                        "BufferedFile::Fill: end of file") != nullptr);
     }
     // Attempting to read beyond the end sets the EOF indicator.
     BOOST_CHECK(bf.eof());
@@ -391,7 +391,7 @@ BOOST_AUTO_TEST_CASE(streams_buffered_file_skip)
     rewind(file);
 
     // The buffer is 25 bytes, allow rewinding 10 bytes.
-    CBufferedFile bf{file, 25, 10, 333};
+    BufferedFile bf{file, 25, 10, 333};
 
     uint8_t i;
     // This is like bf >> (7-byte-variable), in that it will cause data
@@ -445,7 +445,7 @@ BOOST_AUTO_TEST_CASE(streams_buffered_file_rand)
 
         size_t bufSize = InsecureRandRange(300) + 1;
         size_t rewindSize = InsecureRandRange(bufSize);
-        CBufferedFile bf{file, bufSize, rewindSize, 333};
+        BufferedFile bf{file, bufSize, rewindSize, 333};
         size_t currentPos = 0;
         size_t maxPos = 0;
         for (int step = 0; step < 100; ++step) {

src/validation.cpp

@@ -4519,8 +4519,8 @@ void ChainstateManager::LoadExternalBlockFile(
 
     int nLoaded = 0;
     try {
-        // This takes over fileIn and calls fclose() on it in the CBufferedFile destructor
+        // This takes over fileIn and calls fclose() on it in the BufferedFile destructor
-        CBufferedFile blkdat{fileIn, 2 * MAX_BLOCK_SERIALIZED_SIZE, MAX_BLOCK_SERIALIZED_SIZE + 8, CLIENT_VERSION};
+        BufferedFile blkdat{fileIn, 2 * MAX_BLOCK_SERIALIZED_SIZE, MAX_BLOCK_SERIALIZED_SIZE + 8, CLIENT_VERSION};
         // nRewind indicates where to resume scanning in case something goes wrong,
         // such as a block fails to deserialize.
         uint64_t nRewind = blkdat.GetPos();