mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2025-07-24 06:39:46 -06:00
Reformat all the things. Have fun with merge conflicts.
This commit is contained in:
Pierre Bourdon
@ -14,14 +14,14 @@
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#include "Common/FileUtil.h"
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// On disk format:
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//header{
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// header{
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// u32 'DCAC';
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// u32 version; // svn_rev
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// u16 sizeof(key_type);
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// u16 sizeof(value_type);
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//}
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//key_value_pair{
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// key_value_pair{
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// u32 value_size;
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// key_type key;
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// value_type[value_size] value;
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@ -31,7 +31,7 @@ template <typename K, typename V>
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class LinearDiskCacheReader
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{
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public:
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virtual void Read(const K& key, const V* value, u32 value_size) = 0;
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virtual void Read(const K& key, const V* value, u32 value_size) = 0;
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};
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// Dead simple unsorted key-value store with append functionality.
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@ -50,151 +50,143 @@ template <typename K, typename V>
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class LinearDiskCache
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{
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public:
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// return number of read entries
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u32 OpenAndRead(const std::string& filename, LinearDiskCacheReader<K, V> &reader)
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{
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using std::ios_base;
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// return number of read entries
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u32 OpenAndRead(const std::string& filename, LinearDiskCacheReader<K, V>& reader)
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{
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using std::ios_base;
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// Since we're reading/writing directly to the storage of K instances,
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// K must be trivially copyable. TODO: Remove #if once GCC 5.0 is a
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// minimum requirement.
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// Since we're reading/writing directly to the storage of K instances,
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// K must be trivially copyable. TODO: Remove #if once GCC 5.0 is a
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// minimum requirement.
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#if defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 5
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static_assert(std::has_trivial_copy_constructor<K>::value, "K must be a trivially copyable type");
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static_assert(std::has_trivial_copy_constructor<K>::value,
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"K must be a trivially copyable type");
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#else
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static_assert(std::is_trivially_copyable<K>::value, "K must be a trivially copyable type");
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static_assert(std::is_trivially_copyable<K>::value, "K must be a trivially copyable type");
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#endif
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// close any currently opened file
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Close();
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m_num_entries = 0;
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// close any currently opened file
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Close();
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m_num_entries = 0;
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// try opening for reading/writing
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OpenFStream(m_file, filename, ios_base::in | ios_base::out | ios_base::binary);
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// try opening for reading/writing
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OpenFStream(m_file, filename, ios_base::in | ios_base::out | ios_base::binary);
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m_file.seekg(0, std::ios::end);
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std::fstream::pos_type end_pos = m_file.tellg();
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m_file.seekg(0, std::ios::beg);
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std::fstream::pos_type start_pos = m_file.tellg();
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std::streamoff file_size = end_pos - start_pos;
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m_file.seekg(0, std::ios::end);
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std::fstream::pos_type end_pos = m_file.tellg();
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m_file.seekg(0, std::ios::beg);
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std::fstream::pos_type start_pos = m_file.tellg();
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std::streamoff file_size = end_pos - start_pos;
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m_header.Init();
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if (m_file.is_open() && ValidateHeader())
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{
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// good header, read some key/value pairs
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K key;
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m_header.Init();
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if (m_file.is_open() && ValidateHeader())
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{
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// good header, read some key/value pairs
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K key;
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V* value = nullptr;
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u32 value_size = 0;
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u32 entry_number = 0;
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V* value = nullptr;
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u32 value_size = 0;
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u32 entry_number = 0;
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std::fstream::pos_type last_pos = m_file.tellg();
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std::fstream::pos_type last_pos = m_file.tellg();
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while (Read(&value_size))
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{
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std::streamoff next_extent = (last_pos - start_pos) + sizeof(value_size) + value_size;
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if (next_extent > file_size)
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break;
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while (Read(&value_size))
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{
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std::streamoff next_extent = (last_pos - start_pos) + sizeof(value_size) + value_size;
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if (next_extent > file_size)
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break;
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delete[] value;
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value = new V[value_size];
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delete[] value;
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value = new V[value_size];
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// read key/value and pass to reader
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if (Read(&key) &&
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Read(value, value_size) &&
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Read(&entry_number) &&
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entry_number == m_num_entries+1)
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{
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reader.Read(key, value, value_size);
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}
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else
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{
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break;
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}
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// read key/value and pass to reader
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if (Read(&key) && Read(value, value_size) && Read(&entry_number) &&
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entry_number == m_num_entries + 1)
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{
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reader.Read(key, value, value_size);
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}
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else
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{
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break;
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}
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m_num_entries++;
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last_pos = m_file.tellg();
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}
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m_file.seekp(last_pos);
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m_file.clear();
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m_num_entries++;
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last_pos = m_file.tellg();
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}
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m_file.seekp(last_pos);
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m_file.clear();
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delete[] value;
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return m_num_entries;
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}
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delete[] value;
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return m_num_entries;
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}
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// failed to open file for reading or bad header
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// close and recreate file
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Close();
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m_file.open(filename, ios_base::out | ios_base::trunc | ios_base::binary);
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WriteHeader();
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return 0;
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}
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// failed to open file for reading or bad header
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// close and recreate file
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Close();
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m_file.open(filename, ios_base::out | ios_base::trunc | ios_base::binary);
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WriteHeader();
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return 0;
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}
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void Sync()
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{
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m_file.flush();
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}
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void Sync() { m_file.flush(); }
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void Close()
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{
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if (m_file.is_open())
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m_file.close();
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// clear any error flags
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m_file.clear();
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}
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void Close()
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{
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if (m_file.is_open())
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m_file.close();
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// clear any error flags
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m_file.clear();
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}
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// Appends a key-value pair to the store.
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void Append(const K& key, const V* value, u32 value_size)
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{
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// TODO: Should do a check that we don't already have "key"? (I think each caller does that already.)
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Write(&value_size);
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Write(&key);
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Write(value, value_size);
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m_num_entries++;
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Write(&m_num_entries);
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}
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// Appends a key-value pair to the store.
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void Append(const K& key, const V* value, u32 value_size)
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{
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// TODO: Should do a check that we don't already have "key"? (I think each caller does that
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// already.)
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Write(&value_size);
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Write(&key);
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Write(value, value_size);
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m_num_entries++;
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Write(&m_num_entries);
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}
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private:
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void WriteHeader()
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{
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Write(&m_header);
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}
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void WriteHeader() { Write(&m_header); }
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bool ValidateHeader()
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{
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char file_header[sizeof(Header)];
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bool ValidateHeader()
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{
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char file_header[sizeof(Header)];
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return (Read(file_header, sizeof(Header)) &&
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!memcmp((const char*)&m_header, file_header, sizeof(Header)));
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}
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return (Read(file_header, sizeof(Header)) &&
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!memcmp((const char*)&m_header, file_header, sizeof(Header)));
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}
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template <typename D>
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bool Write(const D* data, u32 count = 1)
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{
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return m_file.write((const char*)data, count * sizeof(D)).good();
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}
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template <typename D>
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bool Write(const D* data, u32 count = 1)
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{
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return m_file.write((const char*)data, count * sizeof(D)).good();
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}
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template <typename D>
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bool Read(const D* data, u32 count = 1)
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{
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return m_file.read((char*)data, count * sizeof(D)).good();
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}
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template <typename D>
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bool Read(const D* data, u32 count = 1)
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{
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return m_file.read((char*)data, count * sizeof(D)).good();
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}
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struct Header
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{
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void Init()
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{
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// Null-terminator is intentionally not copied.
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std::memcpy(&id, "DCAC", sizeof(u32));
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std::memcpy(ver, scm_rev_git_str.c_str(), std::min(scm_rev_git_str.size(), sizeof(ver)));
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}
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struct Header
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{
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void Init()
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{
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// Null-terminator is intentionally not copied.
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std::memcpy(&id, "DCAC", sizeof(u32));
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std::memcpy(ver, scm_rev_git_str.c_str(), std::min(scm_rev_git_str.size(), sizeof(ver)));
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}
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u32 id;
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const u16 key_t_size = sizeof(K);
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const u16 value_t_size = sizeof(V);
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char ver[40] = {};
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u32 id;
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const u16 key_t_size = sizeof(K);
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const u16 value_t_size = sizeof(V);
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char ver[40] = {};
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} m_header;
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} m_header;
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std::fstream m_file;
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u32 m_num_entries;
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std::fstream m_file;
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u32 m_num_entries;
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};
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