Add initial project files (excluding ignored content)

external/safetyhook/src/utility.cpp

@@ -0,0 +1,43 @@
+#include "safetyhook/os.hpp"
+
+#include "safetyhook/utility.hpp"
+
+namespace safetyhook {
+bool is_executable(uint8_t* address) {
+    return vm_is_executable(address);
+}
+
+UnprotectMemory::~UnprotectMemory() {
+    if (m_address != nullptr) {
+        vm_protect(m_address, m_size, m_original_protection);
+    }
+}
+
+UnprotectMemory::UnprotectMemory(UnprotectMemory&& other) noexcept {
+    *this = std::move(other);
+}
+
+UnprotectMemory& UnprotectMemory::operator=(UnprotectMemory&& other) noexcept {
+    if (this != &other) {
+        m_address = other.m_address;
+        m_size = other.m_size;
+        m_original_protection = other.m_original_protection;
+        other.m_address = nullptr;
+        other.m_size = 0;
+        other.m_original_protection = 0;
+    }
+
+    return *this;
+}
+
+std::optional<UnprotectMemory> unprotect(uint8_t* address, size_t size) {
+    auto old_protection = vm_protect(address, size, VM_ACCESS_RWX);
+
+    if (!old_protection) {
+        return std::nullopt;
+    }
+
+    return UnprotectMemory{address, size, old_protection.value()};
+}
+
+} // namespace safetyhook