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fs: add IFile::DryWrite, update results

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This commit is contained in:
Michael Scire 2020-03-26 22:01:14 -07:00
parent f1494e650a
commit 4ee8d7fe75
2 changed files with 23 additions and 2 deletions
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23
libraries/libstratosphere/include/stratosphere/fs/fsa/fs_ifile.hpp
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@ -85,7 +85,7 @@ namespace ams::fs::fsa {
protected: protected:
Result DryRead(size_t *out, s64 offset, size_t size, const fs::ReadOption &option, OpenMode open_mode) { Result DryRead(size_t *out, s64 offset, size_t size, const fs::ReadOption &option, OpenMode open_mode) {
/* Check that we can read. */ /* Check that we can read. */
R_UNLESS((open_mode & OpenMode_Read) != 0, fs::ResultInvalidOperationForOpenMode()); R_UNLESS((open_mode & OpenMode_Read) != 0, fs::ResultReadNotPermitted());
/* Get the file size, and validate our offset. */ /* Get the file size, and validate our offset. */
s64 file_size = 0; s64 file_size = 0;
@ -98,12 +98,31 @@ namespace ams::fs::fsa {
Result DrySetSize(s64 size, fs::OpenMode open_mode) { Result DrySetSize(s64 size, fs::OpenMode open_mode) {
/* Check that we can write. */ /* Check that we can write. */
R_UNLESS((open_mode & OpenMode_Write) != 0, fs::ResultInvalidOperationForOpenMode()); R_UNLESS((open_mode & OpenMode_Write) != 0, fs::ResultWriteNotPermitted());
AMS_ASSERT(size >= 0); AMS_ASSERT(size >= 0);
return ResultSuccess(); return ResultSuccess();
} }
Result DryWrite(bool *out_append, s64 offset, size_t size, const fs::WriteOption &option, fs::OpenMode open_mode) {
/* Check that we can write. */
R_UNLESS((open_mode & OpenMode_Write) != 0, fs::ResultWriteNotPermitted());
/* Get the file size. */
s64 file_size = 0;
R_TRY(this->GetSize(&file_size));
/* Determine if we need to append. */
if (file_size < offset + static_cast<s64>(size)) {
R_UNLESS((open_mode & OpenMode_AllowAppend) != 0, fs::ResultFileExtensionWithoutOpenModeAllowAppend());
*out_append = true;
} else {
*out_append = false;
}
return ResultSuccess();
}
private: private:
virtual Result ReadImpl(size_t *out, s64 offset, void *buffer, size_t size, const fs::ReadOption &option) = 0; virtual Result ReadImpl(size_t *out, s64 offset, void *buffer, size_t size, const fs::ReadOption &option) = 0;
virtual Result GetSizeImpl(s64 *out) = 0; virtual Result GetSizeImpl(s64 *out) = 0;

2
libraries/libvapours/include/vapours/results/fs_results.hpp
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@ -240,6 +240,8 @@ namespace ams::fs {
R_DEFINE_ERROR_RANGE(InvalidOperationForOpenMode, 6200, 6299); R_DEFINE_ERROR_RANGE(InvalidOperationForOpenMode, 6200, 6299);
R_DEFINE_ERROR_RESULT(FileExtensionWithoutOpenModeAllowAppend, 6201); R_DEFINE_ERROR_RESULT(FileExtensionWithoutOpenModeAllowAppend, 6201);
R_DEFINE_ERROR_RESULT(ReadNotPermitted, 6202);
R_DEFINE_ERROR_RESULT(WriteNotPermitted, 6203);
R_DEFINE_ERROR_RANGE(UnsupportedOperation, 6300, 6399); R_DEFINE_ERROR_RANGE(UnsupportedOperation, 6300, 6399);
R_DEFINE_ERROR_RESULT(UnsupportedOperationInSubStorageA, 6302); R_DEFINE_ERROR_RESULT(UnsupportedOperationInSubStorageA, 6302);