Emulator: Prefer string_view over const char*

src/cpu.cpp

@@ -13,25 +13,23 @@
 
 CPU::CPU(uint32_t frequency)
 	: ProcessingUnit(frequency)
-{
-	// CGB registers
 	// https://gbdev.io/pandocs/Power_Up_Sequence.html#cpu-registers
-	m_a = 0x11;
-	m_b = 0x0;
-	m_c = 0x0;
-	m_d = 0xff;
-	m_e = 0x56;
-	m_h = 0x0;
-	m_l = 0x0d;
-	m_pc = 0x100;
-	m_sp = 0xffe;
-
+    // CGB registers
+	, m_a(0x11)
+	, m_b(0x0)
+	, m_c(0x0)
+	, m_d(0xff)
+	, m_e(0x56)
+	, m_h(0x0)
+	, m_l(0x0d)
+	, m_pc(0x100)
+	, m_sp(0xffe)
 	// Flags
-	m_zf = 0x1;
-	m_nf = 0x0;
-	m_hf = 0x0;
-	m_cf = 0x0;
-
+	, m_zf(0x1)
+	, m_nf(0x0)
+	, m_hf(0x0)
+	, m_cf(0x0)
+{
 	m_shared_registers.emplace("a", &m_a);
 	m_shared_registers.emplace("b", &m_b);
 	m_shared_registers.emplace("c", &m_c);

src/emu.cpp

@@ -1,13 +1,16 @@
 #include <cstdint> // uint32_t
+#include <string_view>
 
 #include "cpu.h"
 #include "emu.h"
+#include "ruc/file.h"
 #include "ruc/format/print.h"
 
-void Emu::init(uint32_t frequency)
+void Emu::init(uint32_t frequency, std::string_view bootrom)
 {
 	m_frequency = frequency;
 	m_timestep = 1.0 / m_frequency * 1000000;
+	m_bootrom = ruc::File(bootrom.data()).data();
 }
 
 void Emu::update()
@@ -26,23 +29,23 @@ void Emu::update()
 	}
 }
 
-void Emu::addProcessingUnit(const char* name, ProcessingUnit* processing_unit)
+void Emu::addProcessingUnit(std::string_view name, ProcessingUnit* processing_unit)
 {
 	m_processing_units.emplace(name, processing_unit);
 }
 
-void Emu::addMemorySpace(const char* name, uint32_t size)
+void Emu::addMemorySpace(std::string_view name, uint32_t size)
 {
 	std::vector<uint32_t> memory(size);
 	m_memory_spaces.emplace(name, memory);
 }
 
-void Emu::writeMemory(const char* memory_space, uint32_t location, uint32_t value)
+void Emu::writeMemory(std::string_view memory_space, uint32_t location, uint32_t value)
 {
 	m_memory_spaces[memory_space][location] = value;
 }
 
-uint32_t Emu::readMemory(const char* memory_space, uint32_t location)
+uint32_t Emu::readMemory(std::string_view memory_space, uint32_t location)
 {
 	return m_memory_spaces[memory_space][location];
 }

src/emu.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <cstdint> // uint32_t
+#include <string_view>
 #include <unordered_map>
 #include <vector>
 
@@ -12,19 +13,19 @@ class Emu final : public ruc::Singleton<Emu> {
 public:
 	Emu(s) {}
 
-	void init(uint32_t frequency);
+	void init(uint32_t frequency, std::string_view bootrom);
 
 	void update();
 
-	void addProcessingUnit(const char* name, ProcessingUnit* processing_unit);
-	void addMemorySpace(const char* name, uint32_t size);
+	void addProcessingUnit(std::string_view name, ProcessingUnit* processing_unit);
+	void addMemorySpace(std::string_view name, uint32_t size);
 
-	void writeMemory(const char* memory_space, uint32_t location, uint32_t value);
-	uint32_t readMemory(const char* memory_space, uint32_t location);
+	void writeMemory(std::string_view memory_space, uint32_t location, uint32_t value);
+	uint32_t readMemory(std::string_view memory_space, uint32_t location);
 
 	// -------------------------------------
 
-	ProcessingUnit* processingUnit(const char* name) const { return m_processing_units.at(name); }
+	ProcessingUnit* processingUnit(std::string_view name) const { return m_processing_units.at(name); }
 
 private:
 	uint32_t m_frequency { 0 };
@@ -35,6 +36,8 @@ private:
 
 	ruc::Timer m_timer;
 
-	std::unordered_map<const char*, ProcessingUnit*> m_processing_units;
-	std::unordered_map<const char*, std::vector<uint32_t>> m_memory_spaces;
+	std::unordered_map<std::string_view, ProcessingUnit*> m_processing_units;
+	std::unordered_map<std::string_view, std::vector<uint32_t>> m_memory_spaces;
+
+	std::string_view m_bootrom;
 };

src/main.cpp

@@ -15,7 +15,7 @@ int main(int argc, char* argv[])
 
 	print("{}ms\n", t.elapsedNanoseconds() / 1000000.0);
 
-	Emu::the().init(8000000);
+	Emu::the().init(8000000, "gbc_bios.bin");
 
 	CPU cpu(8000000);
 	PPU ppu(4000000);

src/processing-unit.h

@@ -8,6 +8,7 @@
 #pragma once
 
 #include <cstdint> // uint32_t
+#include <string_view>
 #include <unordered_map>
 
 class ProcessingUnit {
@@ -20,9 +21,9 @@ public:
 	// -------------------------------------
 
 	uint32_t frequency() const { return m_frequency; };
-	uint32_t* sharedRegister(const char* shared_register) const { return m_shared_registers.at(shared_register); }
+	uint32_t* sharedRegister(std::string_view shared_register) const { return m_shared_registers.at(shared_register); }
 
 protected:
 	uint32_t m_frequency { 0 };
-	std::unordered_map<const char*, uint32_t*> m_shared_registers;
+	std::unordered_map<std::string_view, uint32_t*> m_shared_registers;
 };