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Merge pull request #702 from lioncash/initialize

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partition_filesystem: Ensure all class members of PartitionFilesystem are initialized
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bunnei 2018-07-19 08:45:54 -07:00 committed by GitHub
commit b0334af05b
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 15 additions and 24 deletions
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29
src/core/file_sys/partition_filesystem.cpp
View file

@ -11,6 +11,11 @@
namespace FileSys { namespace FileSys {
bool PartitionFilesystem::Header::HasValidMagicValue() const {
return magic == Common::MakeMagic('H', 'F', 'S', '0') ||
magic == Common::MakeMagic('P', 'F', 'S', '0');
}
PartitionFilesystem::PartitionFilesystem(std::shared_ptr<VfsFile> file) { PartitionFilesystem::PartitionFilesystem(std::shared_ptr<VfsFile> file) {
// At least be as large as the header // At least be as large as the header
if (file->GetSize() < sizeof(Header)) { if (file->GetSize() < sizeof(Header)) {
@ -20,19 +25,17 @@ PartitionFilesystem::PartitionFilesystem(std::shared_ptr<VfsFile> file) {
// For cartridges, HFSs can get very large, so we need to calculate the size up to // For cartridges, HFSs can get very large, so we need to calculate the size up to
// the actual content itself instead of just blindly reading in the entire file. // the actual content itself instead of just blindly reading in the entire file.
Header pfs_header;
if (sizeof(Header) != file->ReadObject(&pfs_header)) { if (sizeof(Header) != file->ReadObject(&pfs_header)) {
status = Loader::ResultStatus::Error; status = Loader::ResultStatus::Error;
return; return;
} }
if (pfs_header.magic != Common::MakeMagic('H', 'F', 'S', '0') && if (!pfs_header.HasValidMagicValue()) {
pfs_header.magic != Common::MakeMagic('P', 'F', 'S', '0')) {
status = Loader::ResultStatus::ErrorInvalidFormat; status = Loader::ResultStatus::ErrorInvalidFormat;
return; return;
} }
bool is_hfs = pfs_header.magic == Common::MakeMagic('H', 'F', 'S', '0'); is_hfs = pfs_header.magic == Common::MakeMagic('H', 'F', 'S', '0');
size_t entry_size = is_hfs ? sizeof(HFSEntry) : sizeof(PFSEntry); size_t entry_size = is_hfs ? sizeof(HFSEntry) : sizeof(PFSEntry);
size_t metadata_size = size_t metadata_size =
@ -40,27 +43,13 @@ PartitionFilesystem::PartitionFilesystem(std::shared_ptr<VfsFile> file) {
// Actually read in now... // Actually read in now...
std::vector<u8> file_data = file->ReadBytes(metadata_size); std::vector<u8> file_data = file->ReadBytes(metadata_size);
const size_t total_size = file_data.size();
if (file_data.size() != metadata_size) { if (total_size != metadata_size) {
status = Loader::ResultStatus::Error; status = Loader::ResultStatus::Error;
return; return;
} }
size_t total_size = file_data.size();
if (total_size < sizeof(Header)) {
status = Loader::ResultStatus::Error;
return;
}
memcpy(&pfs_header, file_data.data(), sizeof(Header));
if (pfs_header.magic != Common::MakeMagic('H', 'F', 'S', '0') &&
pfs_header.magic != Common::MakeMagic('P', 'F', 'S', '0')) {
status = Loader::ResultStatus::ErrorInvalidFormat;
return;
}
is_hfs = pfs_header.magic == Common::MakeMagic('H', 'F', 'S', '0');
size_t entries_offset = sizeof(Header); size_t entries_offset = sizeof(Header);
size_t strtab_offset = entries_offset + (pfs_header.num_entries * entry_size); size_t strtab_offset = entries_offset + (pfs_header.num_entries * entry_size);
content_offset = strtab_offset + pfs_header.strtab_size; content_offset = strtab_offset + pfs_header.strtab_size;

10
src/core/file_sys/partition_filesystem.h
View file

@ -42,6 +42,8 @@ private:
u32_le num_entries; u32_le num_entries;
u32_le strtab_size; u32_le strtab_size;
INSERT_PADDING_BYTES(0x4); INSERT_PADDING_BYTES(0x4);
bool HasValidMagicValue() const;
}; };
static_assert(sizeof(Header) == 0x10, "PFS/HFS header structure size is wrong"); static_assert(sizeof(Header) == 0x10, "PFS/HFS header structure size is wrong");
@ -73,11 +75,11 @@ private:
#pragma pack(pop) #pragma pack(pop)
Loader::ResultStatus status; Loader::ResultStatus status{};
Header pfs_header; Header pfs_header{};
bool is_hfs; bool is_hfs = false;
size_t content_offset; size_t content_offset = 0;
std::vector<VirtualFile> pfs_files; std::vector<VirtualFile> pfs_files;
std::vector<VirtualDir> pfs_dirs; std::vector<VirtualDir> pfs_dirs;