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Merge pull request #5225 from FearlessTobi/port-3672

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Port yuzu-emu/yuzu#3672: "file_util: Early-exit in Write/ReadArray if specified lengths are zero"
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Ben 2020-05-11 09:45:39 +02:00 committed by GitHub
commit d11d600b61
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 35 additions and 12 deletions
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30
src/common/file_util.cpp
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@ -992,6 +992,36 @@ bool IOFile::Flush() {
return m_good;
}
std::size_t IOFile::ReadImpl(void* data, std::size_t length, std::size_t data_size) {
if (!IsOpen()) {
m_good = false;
return std::numeric_limits<std::size_t>::max();
}
if (length == 0) {
return 0;
}
DEBUG_ASSERT(data != nullptr);
return std::fread(data, data_size, length, m_file);
}
std::size_t IOFile::WriteImpl(const void* data, std::size_t length, std::size_t data_size) {
if (!IsOpen()) {
m_good = false;
return std::numeric_limits<std::size_t>::max();
}
if (length == 0) {
return 0;
}
DEBUG_ASSERT(data != nullptr);
return std::fwrite(data, data_size, length, m_file);
}
bool IOFile::Resize(u64 size) {
if (!IsOpen() || 0 !=
#ifdef _WIN32

17
src/common/file_util.h
View file

@ -273,12 +273,7 @@ public:
static_assert(std::is_trivially_copyable_v<T>,
"Given array does not consist of trivially copyable objects");
if (!IsOpen()) {
m_good = false;
return std::numeric_limits<std::size_t>::max();
}
std::size_t items_read = std::fread(data, sizeof(T), length, m_file);
std::size_t items_read = ReadImpl(data, length, sizeof(T));
if (items_read != length)
m_good = false;
@ -290,12 +285,7 @@ public:
static_assert(std::is_trivially_copyable_v<T>,
"Given array does not consist of trivially copyable objects");
if (!IsOpen()) {
m_good = false;
return std::numeric_limits<std::size_t>::max();
}
std::size_t items_written = std::fwrite(data, sizeof(T), length, m_file);
std::size_t items_written = WriteImpl(data, length, sizeof(T));
if (items_written != length)
m_good = false;
@ -349,6 +339,9 @@ public:
}
private:
std::size_t ReadImpl(void* data, std::size_t length, std::size_t data_size);
std::size_t WriteImpl(const void* data, std::size_t length, std::size_t data_size);
bool Open();
std::FILE* m_file = nullptr;