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[FS] Implement SetSize

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wheremyfoodat 2023-04-11 01:11:20 +03:00
parent 82b986bbc0
commit 075a244dd0
3 changed files with 51 additions and 0 deletions
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20
include/io_file.hpp
View file

@ -18,6 +18,12 @@
#define _CRT_SECURE_NO_WARNINGS
#endif
#ifdef WIN32
#include <io.h> // For _chsize_s
#else
#include <unistd.h> // For ftruncate
#endif
class IOFile {
FILE* handle = nullptr;
static inline std::filesystem::path appData = ""; // Directory for holding app data. AppData on Windows
@ -112,5 +118,19 @@ public:
appData = dir;
}
// Sets the size of the file to "size" and returns whether it succeeded or not
bool setSize(std::uint64_t size) {
if (!isOpen()) return false;
bool success;
#ifdef WIN32
success = _chsize_s(_fileno(handle), size) == 0;
#else
success = ftruncate(fileno(handle), size) == 0;
#endif
fflush(handle);
return success;
}
static std::filesystem::path getAppData() { return IOFile::appData; }
};

1
include/kernel/kernel.hpp
View file

@ -127,6 +127,7 @@ private:
void writeFile(u32 messagePointer, Handle file);
void getFileSize(u32 messagePointer, Handle file);
void openLinkFile(u32 messagePointer, Handle file);
void setFileSize(u32 messagePointer, Handle file);
void setFilePriority(u32 messagePointer, Handle file);
// Directory operations

30
src/core/kernel/file_operations.cpp
View file

@ -5,6 +5,7 @@ namespace FileOps {
Read = 0x080200C2,
Write = 0x08030102,
GetSize = 0x08040000,
SetSize = 0x08050080,
Close = 0x08080000,
SetPriority = 0x080A0040,
OpenLinkFile = 0x080C0000
@ -25,6 +26,7 @@ void Kernel::handleFileOperation(u32 messagePointer, Handle file) {
case FileOps::GetSize: getFileSize(messagePointer, file); break;
case FileOps::OpenLinkFile: openLinkFile(messagePointer, file); break;
case FileOps::Read: readFile(messagePointer, file); break;
case FileOps::SetSize: setFileSize(messagePointer, file); break;
case FileOps::SetPriority: setFilePriority(messagePointer, file); break;
case FileOps::Write: writeFile(messagePointer, file); break;
default: Helpers::panic("Unknown file operation: %08X", cmd);
@ -132,6 +134,34 @@ void Kernel::writeFile(u32 messagePointer, Handle fileHandle) {
}
}
void Kernel::setFileSize(u32 messagePointer, Handle fileHandle) {
logFileIO("Setting size of file %X\n", fileHandle);
const auto p = getObject(fileHandle, KernelObjectType::File);
if (p == nullptr) [[unlikely]] {
Helpers::panic("Called SetFileSize on non-existent file");
}
FileSession* file = p->getData<FileSession>();
if (!file->isOpen) {
Helpers::panic("Tried to get size of closed file");
}
if (file->fd) {
const u64 newSize = mem.read64(messagePointer + 4);
IOFile f(file->fd);
bool success = f.setSize(newSize);
if (success) {
mem.write32(messagePointer + 4, Result::Success);
} else {
Helpers::panic("FileOp::SetFileSize failed");
}
} else {
Helpers::panic("Tried to set file size of file without file descriptor");
}
}
void Kernel::getFileSize(u32 messagePointer, Handle fileHandle) {
logFileIO("Getting size of file %X\n", fileHandle);