Merge remote-tracking branch 'origin/master'

docs(contrib): make CONTRIBUTING.md better

CONTRIBUTING.md

@@ -1 +1 @@
-TBD
+The commits must be as good as CHatingPython's.

furvm/include/furvm/executor.hpp

@@ -4,7 +4,6 @@
 #include "furvm/fwd.hpp"
 
 #include <stack>
-#include <vector>
 
 namespace furvm {
 
@@ -45,8 +44,6 @@ public:
         mod_p       mod;       /**< Shared pointer to a module with the bytecode. */
         std::size_t position;  /**< Cursor to a current instruction in the bytecode. */
         std::size_t stackBase; /**< Snapshot of the stack size before this frame. */
-
-        std::vector<thing_p> variables; /**< Frame variables. */
     };
 public:
     /**
@@ -142,30 +139,6 @@ public:
      * @return The thing.
      */
     thing_p thing() const;
-public:
-    /**
-     * @brief Stores a thing in a variable.
-     *
-     * @param variable Variable to store the thing in.
-     * @param thing Thing to store.
-     */
-    void store_thing(variable_t variable, const thing_p& thing);
-
-    /**
-     * @brief Stores a thing in a variable.
-     *
-     * @param variable Variable to store the thing in.
-     * @param thing Thing to store.
-     */
-    void store_thing(variable_t variable, thing_p&& thing);
-
-    /**
-     * @brief Returns a thing stored in a variable.
-     *
-     * @param variable Variable where the thing is stored.
-     * @return The thing stored in the variable.
-     */
-    thing_p load_thing(variable_t variable) const;
 public:
     /**
      * @brief Executes next instruction.

furvm/include/furvm/fwd.hpp

@@ -132,11 +132,6 @@ using thing_handle = std::uint32_t;
 
 // executor.hpp
 
-/**
- * @brief A variable index type.
- */
-using variable_t = std::uint16_t;
-
 /**
  * @enum executor_flags
  * @brief Flags of an executor.

furvm/include/furvm/instruction.hpp

@@ -65,20 +65,6 @@ enum class instruction_t : byte {
      */
     Mod,
 
-    /**
-     * @brief Pushes a variable onto the stack.
-     *
-     * Fetches a variable denoted by next two bytes in little-endian and pushes it onto the stack.
-     */
-    Load,
-
-    /**
-     * @brief Stores an element from the stack in a variable.
-     *
-     * Pops a thing from the stack and stores it in a variable denoted by next two bytes in little-endian.
-     */
-    Store,
-
     /**
      * @brief Calls a function.
      *

furvm/include/furvm/module.hpp

@@ -9,7 +9,6 @@ namespace furvm {
 
 class mod {
     friend class function;
-    friend class serializer;
 public:
     using bytecode_t = std::vector<byte>; /**< An alias to a vector of bytes. */
 public:

furvm/include/furvm/serializer.hpp

@@ -1,20 +0,0 @@
-#ifndef FURVM_SERIALIZER_HPP
-#define FURVM_SERIALIZER_HPP
-
-#include "furvm/fwd.hpp"
-
-#include <ostream>
-
-namespace furvm {
-
-class serializer {
-public:
-    static constexpr byte          MODULE_MAGIC[4] = { 'F', 'u', 'r', 'M' };
-    static constexpr std::uint32_t VERSION         = 0;
-public:
-    static bool serialize_module(std::ostream& os, const mod_p& mod);
-};
-
-} // namespace furvm
-
-#endif // FURVM_SERIALIZER_HPP

furvm/src/executor.cpp

@@ -3,11 +3,9 @@
 #include "furvm/context.hpp" // IWYU pragma: keep
 #include "furvm/exceptions.hpp"
 #include "furvm/function.hpp" // IWYU pragma: keep
-#include "furvm/fwd.hpp"
 #include "furvm/instruction.hpp"
 #include "furvm/thing.hpp"
 
-#include <cstdint>
 #include <stdexcept>
 
 namespace furvm {
@@ -64,31 +62,6 @@ thing_p executor::thing() const {
     return m_stack.top();
 }
 
-void executor::store_thing(variable_t variable, const thing_p& thing) {
-    auto& frame = m_frames.top();
-    frame.variables.resize(variable + 1);
-    if (frame.variables[variable] != nullptr) {
-        frame.variables[variable]->remove_reference();
-    }
-    frame.variables[variable] = thing;
-    thing->add_reference();
-}
-
-void executor::store_thing(variable_t variable, thing_p&& thing) {
-    auto& frame = m_frames.top();
-    frame.variables.resize(variable + 1);
-    if (frame.variables[variable] != nullptr) {
-        frame.variables[variable]->remove_reference();
-    }
-    thing->add_reference();
-    frame.variables[variable] = std::move(thing);
-}
-
-thing_p executor::load_thing(variable_t variable) const {
-    const auto& frame = m_frames.top();
-    return frame.variables[variable];
-}
-
 void executor::step() {
     if ((m_flags & executor_flags::Suspended) == executor_flags::Suspended) return;
 
@@ -136,16 +109,6 @@ void executor::step() {
         auto lhs = pop_thing();
         push_thing(lhs % rhs);
     } break;
-    case instruction_t::Load: {
-        variable_t variable = static_cast<std::uint16_t>(frame.mod->byte(frame.position)) |
-                              (static_cast<std::uint16_t>(frame.mod->byte(frame.position + 1)) << 8);
-        push_thing(load_thing(variable));
-    } break;
-    case instruction_t::Store: {
-        variable_t variable = static_cast<std::uint16_t>(frame.mod->byte(frame.position)) |
-                              (static_cast<std::uint16_t>(frame.mod->byte(frame.position + 1)) << 8);
-        store_thing(variable, std::move(pop_thing()));
-    } break;
     case instruction_t::Call: {
         function_handle funcId = static_cast<std::uint16_t>(frame.mod->byte(frame.position)) |
                                  (static_cast<std::uint16_t>(frame.mod->byte(frame.position + 1)) << 8);

furvm/src/main.cpp

@@ -4,12 +4,10 @@
 #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>
 
@@ -18,9 +16,16 @@ 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>();
 
@@ -28,8 +33,7 @@ int main(void) {
 
     auto mainFunction = furvm::function::create(mainModule, 0);
 
-    std::ofstream file("./test.furm", std::ios::binary);
-    furvm::serializer::serialize_module(file, mainModule);
+    auto printFunction = furvm::function::create(mainModule, print);
 
     auto executor = furvm::executor::create(context);
     executor->push_frame(mainFunction);

furvm/src/serializer.cpp

@@ -1,101 +0,0 @@
-#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