feat(furvm): add serializer

furvm/src/main.cpp

@@ -4,10 +4,12 @@
 #include "furvm/executor.hpp"
 #include "furvm/function.hpp"
 #include "furvm/instruction.hpp"
+#include "furvm/serializer.hpp"
 #include "furvm/thing.hpp"
 
 #include <array>
 #include <cstddef>
+#include <fstream>
 #include <iostream>
 #include <memory>
 
@@ -16,16 +18,9 @@ static constexpr std::array<furvm::byte, 8> s_bytecode = {
     67,
     furvm::byte(furvm::instruction_t::Clone),
     furvm::byte(furvm::instruction_t::Add),
-    furvm::byte(furvm::instruction_t::Call),
-    1,
-    0,
     furvm::byte(furvm::instruction_t::Return),
 };
 
-void print(furvm::executor& exec) {
-    std::cout << exec.pop_thing()->int32() << '\n';
-}
-
 int main(void) {
     auto context = std::make_shared<furvm::context>();
 
@@ -33,7 +28,8 @@ int main(void) {
 
     auto mainFunction = furvm::function::create(mainModule, 0);
 
-    auto printFunction = furvm::function::create(mainModule, print);
+    std::ofstream file("./test.furm", std::ios::binary);
+    furvm::serializer::serialize_module(file, mainModule);
 
     auto executor = furvm::executor::create(context);
     executor->push_frame(mainFunction);

furvm/src/serializer.cpp

@@ -0,0 +1,101 @@
+#include "furvm/serializer.hpp"
+
+#include "furvm/function.hpp" // IWYU pragma: keep
+
+#include <array>
+#include <cstring>
+#include <istream>
+#include <optional>
+#include <ostream>
+#include <stdexcept>
+
+namespace furvm {
+
+template <typename T>
+static inline void write_raw(std::ostream& os, const T& value) {
+    os.write(reinterpret_cast<const char*>(&value), sizeof(T));
+}
+
+template <typename T>
+static inline void read_raw(std::istream& is, T& value) {
+    is.read(reinterpret_cast<char*>(&value), sizeof(T));
+}
+
+static inline void write_u64(std::ostream& os, std::uint64_t value) {
+    os.put(static_cast<char>((value >> 0ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 8ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 16ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 24ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 32ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 40ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 48ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 56ULL) & 0xFF));
+}
+
+static inline void read_u64(std::istream& is, std::uint64_t& value) {
+    value = (static_cast<std::uint64_t>(is.get()) << 0) | (static_cast<std::uint64_t>(is.get()) << 8) |
+            (static_cast<std::uint64_t>(is.get()) << 16) | (static_cast<std::uint64_t>(is.get()) << 24) |
+            (static_cast<std::uint64_t>(is.get()) << 32) | (static_cast<std::uint64_t>(is.get()) << 40) |
+            (static_cast<std::uint64_t>(is.get()) << 48) | (static_cast<std::uint64_t>(is.get()) << 56);
+}
+
+static inline void write_u32(std::ostream& os, std::uint32_t value) {
+    os.put(static_cast<char>((value >> 0ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 8ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 16ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 24ULL) & 0xFF));
+}
+
+static inline void read_u32(std::istream& is, std::uint32_t& value) {
+    value = static_cast<std::uint32_t>(is.get() << 0) | static_cast<std::uint32_t>(is.get() << 8) |
+            static_cast<std::uint32_t>(is.get() << 16) | static_cast<std::uint32_t>(is.get() << 24);
+}
+
+static inline void write_u16(std::ostream& os, std::uint16_t value) {
+    os.put(static_cast<char>((value >> 0ULL) & 0xFF));
+    os.put(static_cast<char>((value >> 8ULL) & 0xFF));
+}
+
+static inline void read_u16(std::istream& is, std::uint16_t& value) {
+    value = static_cast<std::uint16_t>(is.get() << 0) | static_cast<std::uint16_t>(is.get() << 8);
+}
+
+static inline void write_u8(std::ostream& os, std::uint8_t value) {
+    os.put(static_cast<char>((value >> 0ULL) & 0xFF));
+}
+
+static inline void read_u8(std::istream& is, std::uint8_t& value) {
+    value = static_cast<std::uint8_t>(is.get() << 0);
+}
+
+bool serializer::serialize_module(std::ostream& os, const mod_p& mod) {
+    os.write(reinterpret_cast<const char*>(MODULE_MAGIC), sizeof(MODULE_MAGIC));
+    write_u32(os, VERSION);
+
+    write_u32(os, mod->m_functions.size());
+    for (const auto& func : mod->m_functions) {
+        write_u16(os, func->id());
+        write_u8(os, static_cast<std::uint8_t>(func->type()));
+        switch (func->type()) {
+        case function_t::Normal: {
+            write_u64(os, func->position());
+        } break;
+        case function_t::Native: {
+            // TODO: Replace with a reference to the function's name from constant pool
+            throw std::runtime_error("cannot serialize native functions yet");
+        } break;
+        case function_t::Import: {
+            // TODO: Replace with a reference to the module's and function's name from constant pool
+            throw std::runtime_error("cannot serialize import functions yet");
+        } break;
+        }
+    }
+
+    write_u64(os, mod->m_bytecode.size());
+    os.write(reinterpret_cast<const char*>(mod->m_bytecode.data()),
+        static_cast<std::streamsize>(mod->m_bytecode.size()));
+
+    return false;
+}
+
+} // namespace furvm