Merge commit '1bfb7f99c215e2c74556bd3281f44962b8faaa96'

deps/ox/src/ox/std/ignore.hpp

@@ -16,7 +16,7 @@
 
 namespace std {
 
-inline constexpr struct {
+inline constexpr struct ignore_t {
 	constexpr void operator=(auto&&) const noexcept {}
 } ignore;
 

deps/ox/src/ox/std/span.hpp

@@ -163,6 +163,24 @@ class Span {
 			return *this;
 		}
 
+		constexpr Span operator++(int) noexcept {
+			++m_items;
+			--m_size;
+			if (!m_size) [[unlikely]] {
+				m_items = nullptr;
+			}
+			return *this;
+		}
+
+		constexpr Span operator++() noexcept {
+			++m_items;
+			--m_size;
+			if (!m_size) [[unlikely]] {
+				m_items = nullptr;
+			}
+			return *this;
+		}
+
 		[[nodiscard]]
 		constexpr auto data() const noexcept {
 			return m_items;

deps/ox/src/ox/std/string.hpp

@@ -139,7 +139,7 @@ class BasicString {
 
 		constexpr BasicString &operator+=(Integer_c auto i) noexcept;
 
-		constexpr BasicString &operator+=(StringView src) noexcept;
+		constexpr BasicString &operator+=(StringViewCR src) noexcept;
 
 		constexpr BasicString &operator+=(BasicString const&src) noexcept;
 
@@ -185,7 +185,7 @@ class BasicString {
 			return {};
 		}
 
-		constexpr Error append(ox::StringView sv) noexcept {
+		constexpr Error append(StringViewCR sv) noexcept {
 			return append(sv.data(), sv.size());
 		}
 
@@ -376,7 +376,7 @@ constexpr BasicString<SmallStringSize_v> &BasicString<SmallStringSize_v>::operat
 }
 
 template<std::size_t SmallStringSize_v>
-constexpr BasicString<SmallStringSize_v> &BasicString<SmallStringSize_v>::operator+=(StringView s) noexcept {
+constexpr BasicString<SmallStringSize_v> &BasicString<SmallStringSize_v>::operator+=(StringViewCR s) noexcept {
 	std::size_t strLen = s.bytes();
 	std::ignore = append(s.data(), strLen);
 	return *this;
@@ -456,7 +456,7 @@ constexpr bool BasicString<SmallStringSize_v>::operator==(const char *other) con
 
 template<std::size_t SmallStringSize_v>
 constexpr bool BasicString<SmallStringSize_v>::operator==(OxString_c auto const&other) const noexcept {
-	return ox::StringView(*this) == ox::StringView(other);
+	return StringView(*this) == StringView(other);
 }
 
 template<std::size_t SmallStringSize_v>
@@ -548,28 +548,28 @@ using StringCR = String const&;
 
 
 [[nodiscard]]
-constexpr ox::String toString(ox::StringViewCR sv) noexcept {
+constexpr String toString(StringViewCR sv) noexcept {
 	return ox::String(sv);
 }
 
 
 template<typename PlatSpec, std::size_t SmallStringSize_v>
 [[nodiscard]]
-constexpr auto sizeOf(const ox::BasicString<SmallStringSize_v>*) noexcept {
+constexpr auto sizeOf(BasicString<SmallStringSize_v> const*) noexcept {
 	VectorMemMap<PlatSpec> v{.smallVecSize = SmallStringSize_v};
 	return sizeOf<PlatSpec>(&v);
 }
 
 template<typename PlatSpec, std::size_t SmallStringSize_v>
 [[nodiscard]]
-constexpr auto alignOf(const ox::BasicString<SmallStringSize_v>&) noexcept {
+constexpr auto alignOf(BasicString<SmallStringSize_v> const&) noexcept {
 	VectorMemMap<PlatSpec> v{.smallVecSize = SmallStringSize_v};
 	return alignOf<PlatSpec>(&v);
 }
 
 template<size_t sz>
-struct MaybeView<ox::BasicString<sz>> {
-	using type = ox::StringView;
+struct MaybeView<BasicString<sz>> {
+	using type = StringView;
 };
 
 }

deps/ox/src/ox/std/strops.hpp

@@ -21,7 +21,7 @@ OX_CLANG_NOWARN_BEGIN(-Wunsafe-buffer-usage)
 namespace ox {
 
 [[nodiscard]]
-constexpr ox::StringView substr(ox::StringView const&str, std::size_t pos) noexcept {
+constexpr StringView substr(StringViewCR str, std::size_t const pos) noexcept {
 	if (str.size() >= pos) {
 		return {&str[pos], str.size() - pos};
 	}
@@ -29,13 +29,23 @@ constexpr ox::StringView substr(ox::StringView const&str, std::size_t pos) noexc
 }
 
 [[nodiscard]]
-constexpr ox::StringView substr(ox::StringView const&str, std::size_t start, std::size_t end) noexcept {
+constexpr StringView substr(StringViewCR str, std::size_t const start, std::size_t const end) noexcept {
 	if (str.size() >= start && end >= start) {
 		return {&str[start], end - start};
 	}
 	return {};
 }
 
+[[nodiscard]]
+constexpr bool beginsWith(StringViewCR base, char const beginning) noexcept {
+	return base.size() && base[0] == beginning;
+}
+
+[[nodiscard]]
+constexpr bool endsWith(StringViewCR base, char const ending) noexcept {
+	return base.size() && base[base.size() - 1] == ending;
+}
+
 [[nodiscard]]
 constexpr bool beginsWith(StringViewCR base, StringViewCR beginning) noexcept {
 	const auto beginningLen = ox::min(beginning.size(), base.size());
@@ -49,7 +59,7 @@ constexpr bool endsWith(StringViewCR base, StringViewCR ending) noexcept {
 }
 
 [[nodiscard]]
-constexpr std::size_t find(StringViewCR str, char search) noexcept {
+constexpr std::size_t find(StringViewCR str, char const search) noexcept {
 	std::size_t i = 0;
 	for (; i < str.size(); ++i) {
 		if (str[i] == search) {
@@ -72,7 +82,7 @@ constexpr std::size_t find(StringViewCR str, StringViewCR search) noexcept {
 
 template<std::size_t smallSz = 0>
 [[nodiscard]]
-constexpr ox::Vector<ox::StringView, smallSz> split(StringViewCR str, char del) noexcept {
+constexpr ox::Vector<ox::StringView, smallSz> split(StringViewCR str, char const del) noexcept {
 	ox::Vector<ox::StringView, smallSz> out;
 	constexpr auto nextSeg = [](StringViewCR current, char del) {
 		return substr(current, find(current, del) + 1);
@@ -105,7 +115,7 @@ constexpr ox::Vector<ox::StringView, smallSz> split(StringViewCR str, StringView
 }
 
 [[nodiscard]]
-constexpr ox::Result<std::size_t> lastIndexOf(ox::StringViewCR str, int character) noexcept {
+constexpr ox::Result<std::size_t> lastIndexOf(ox::StringViewCR str, int const character) noexcept {
 	ox::Result<std::size_t> retval = ox::Error(1, "Character not found");
 	for (auto i = static_cast<int>(str.bytes() - 1); i >= 0; --i) {
 		if (str[static_cast<std::size_t>(i)] == character) {

deps/ox/src/ox/std/vector.hpp

@@ -87,7 +87,9 @@ struct VectorAllocator {
 		constexpr void deallocate(T *items, std::size_t cap) noexcept {
 			// small vector optimization cannot be done it constexpr, but it doesn't really matter in constexpr
 			if (std::is_constant_evaluated()) {
-				Allocator{}.deallocate(items, cap);
+				if (items) {
+					Allocator{}.deallocate(items, cap);
+				}
 			} else {
 				if (items && static_cast<void*>(items) != static_cast<void*>(m_data.data())) {
 					Allocator{}.deallocate(items, cap);

deps/teagba/include/teagba/addresses.hpp

@@ -54,25 +54,41 @@ inline volatile BgCtl &regBgCtl(uintptr_t const bgIdx) noexcept {
 }
 
 // background horizontal scrolling registers
-#define REG_BG0HOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0010))
-#define REG_BG1HOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0014))
-#define REG_BG2HOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0018))
-#define REG_BG3HOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'001c))
+#define REG_BG0HOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0010))
+#define REG_BG1HOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0014))
+#define REG_BG2HOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0018))
+#define REG_BG3HOFS (*reinterpret_cast<volatile int16_t*>(0x0400'001c))
 
 [[nodiscard]]
-volatile uint32_t &regBgHofs(auto const bgIdx) noexcept {
-	return *reinterpret_cast<volatile uint32_t*>(0x0400'0010 + 4 * bgIdx);
+volatile int16_t &regBgHofs(auto const bgIdx) noexcept {
+	return *reinterpret_cast<volatile int16_t*>(0x0400'0010 + 4 * bgIdx);
 }
 
 // background vertical scrolling registers
-#define REG_BG0VOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0012))
-#define REG_BG1VOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'0016))
-#define REG_BG2VOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'001a))
-#define REG_BG3VOFS (*reinterpret_cast<volatile uint32_t*>(0x0400'001e))
+#define REG_BG0VOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0012))
+#define REG_BG1VOFS (*reinterpret_cast<volatile int16_t*>(0x0400'0016))
+#define REG_BG2VOFS (*reinterpret_cast<volatile int16_t*>(0x0400'001a))
+#define REG_BG3VOFS (*reinterpret_cast<volatile int16_t*>(0x0400'001e))
 
 [[nodiscard]]
-volatile uint32_t &regBgVofs(auto const bgIdx) noexcept {
-	return *reinterpret_cast<volatile uint32_t*>(0x0400'0012 + 4 * bgIdx);
+volatile int16_t &regBgVofs(auto const bgIdx) noexcept {
+	return *reinterpret_cast<volatile int16_t*>(0x0400'0012 + 4 * bgIdx);
+}
+
+// background scrolling registers
+
+struct OffsetPair {
+	int16_t x{}, y{};
+};
+
+#define REG_BG0OFS (*reinterpret_cast<volatile OffsetPair*>(0x0400'0010))
+#define REG_BG1OFS (*reinterpret_cast<volatile OffsetPair*>(0x0400'0014))
+#define REG_BG2OFS (*reinterpret_cast<volatile OffsetPair*>(0x0400'0018))
+#define REG_BG3OFS (*reinterpret_cast<volatile OffsetPair*>(0x0400'001c))
+
+[[nodiscard]]
+volatile OffsetPair &regBgOfs(auto const bgIdx) noexcept {
+	return *reinterpret_cast<volatile OffsetPair*>(0x0400'0010 + sizeof(OffsetPair) * bgIdx);
 }
 
 /////////////////////////////////////////////////////////////////

deps/teagba/include/teagba/gfx.hpp

@@ -41,4 +41,8 @@ void addSpriteUpdate(GbaSpriteAttrUpdate const &upd) noexcept;
 
 void applySpriteUpdates() noexcept;
 
+void setBgOffset(uint16_t bg, int16_t x, int16_t y) noexcept;
+
+void scrollBgOffset(uint16_t bg, int16_t x, int16_t y) noexcept;
+
 }

deps/teagba/src/gfx.cpp

@@ -12,7 +12,7 @@ namespace teagba {
 
 static ox::Array<GbaSpriteAttrUpdate, 128> g_spriteBuffer;
 
-GbaSpriteAttrUpdate &spriteAttr(size_t i) noexcept {
+GbaSpriteAttrUpdate &spriteAttr(size_t const i) noexcept {
 	return g_spriteBuffer[i];
 }
 
@@ -29,4 +29,16 @@ void applySpriteUpdates() noexcept {
 	}
 }
 
+void setBgOffset(uint16_t const bg, int16_t const x, int16_t const y) noexcept {
+	auto &o = regBgOfs(bg);
+	o.x = x;
+	o.y = y;
+}
+
+void scrollBgOffset(uint16_t const bg, int16_t const x, int16_t const y) noexcept {
+	auto &o = regBgOfs(bg);
+	o.x = o.x + x;
+	o.y = o.y + y;
+}
+
 }