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FileSystem: Add 64-bit fseek/ftell wrappers

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This commit is contained in:
Connor McLaughlin 2021-04-07 18:30:38 +10:00
parent cbf0a21f05
commit c71f78ffa0
2 changed files with 27 additions and 0 deletions
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25
src/common/file_system.cpp
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@ -500,6 +500,31 @@ std::FILE* OpenCFile(const char* filename, const char* mode)
#endif
}
int FSeek64(std::FILE* fp, s64 offset, int whence)
{
#ifdef _WIN32
return _fseeki64(fp, offset, whence);
#else
// Prevent truncation on platforms which don't have a 64-bit off_t (Android 32-bit).
if constexpr (sizeof(off_t) != sizeof(s64))
{
if (offset < std::numeric_limits<off_t>::min() || offset > std::numeric_limits<off_t>::max())
return -1;
}
return fseeko(fp, static_cast<off_t>(offset), whence);
#endif
}
s64 FTell64(std::FILE* fp)
{
#ifdef _WIN32
return static_cast<s64>(_ftelli64(fp));
#else
return static_cast<s64>(ftello(fp));
#endif
}
std::optional<std::vector<u8>> ReadBinaryFile(const char* filename)
{
ManagedCFilePtr fp = OpenManagedCFile(filename, "rb");

2
src/common/file_system.h
View file

@ -183,6 +183,8 @@ std::unique_ptr<ByteStream> OpenFile(const char* FileName, u32 Flags);
using ManagedCFilePtr = std::unique_ptr<std::FILE, void (*)(std::FILE*)>;
ManagedCFilePtr OpenManagedCFile(const char* filename, const char* mode);
std::FILE* OpenCFile(const char* filename, const char* mode);
int FSeek64(std::FILE* fp, s64 offset, int whence);
s64 FTell64(std::FILE* fp);
std::optional<std::vector<u8>> ReadBinaryFile(const char* filename);
std::optional<std::vector<u8>> ReadBinaryFile(std::FILE* fp);