Embed the SDL2 libraries into vendor:sdl2

vendor/sdl2/sdl_rwops.odin

@@ -0,0 +1,108 @@
+package sdl2
+
+import "core:c"
+
+when ODIN_OS == "windows" do foreign import lib "SDL2.lib"
+when ODIN_OS == "linux"   do foreign import lib "system:SDL2"
+when ODIN_OS == "darwin"  do foreign import lib "system:SDL2"
+when ODIN_OS == "freebsd" do foreign import lib "system:SDL2"
+
+/* RWops Types */
+RWOPS_UNKNOWN   :: 0; /**< Unknown stream type */
+RWOPS_WINFILE   :: 1; /**< Win32 file */
+RWOPS_STDFILE   :: 2; /**< Stdio file */
+RWOPS_JNIFILE   :: 3; /**< Android asset */
+RWOPS_MEMORY    :: 4; /**< Memory stream */
+RWOPS_MEMORY_RO :: 5; /**< Read-Only memory stream */
+RWOPS_VITAFILE  :: 6; /**< Vita file */
+
+
+/**
+ * This is the read/write operation structure -- very basic.
+ */
+RWops :: struct {
+	size:  proc "c" (ctx: ^RWops) -> i64,
+	seek:  proc "c" (ctx: ^RWops, offset: i64, whence: c.int) -> i64,
+	read:  proc "c" (ctx: ^RWops, ptr: rawptr, size: c.size_t, maxnum: c.size_t) -> c.size_t,
+	write: proc "c" (ctx: ^RWops, ptr: rawptr, size: c.size_t, num: c.size_t) -> c.size_t,
+	close: proc "c" (ctx: ^RWops) -> c.int,
+
+	type: u32,
+	hidden: struct #raw_union {
+		androidio: struct {
+			asset: rawptr,
+		},
+		windowsio: struct {
+			append: bool,
+			h: rawptr,
+			buffer: struct {
+				data: rawptr,
+				size: c.size_t,
+				left: c.size_t,
+			},
+		},
+		vitaio: struct {
+			h: c.int,
+			buffer: struct {
+				data: rawptr,
+				size: c.size_t,
+				left: c.size_t,
+			},
+		},
+		stdio: struct {
+			autoclose: bool,
+			fp: rawptr,
+		},
+		mem: struct {
+			base: ^u8,
+			here: ^u8,
+			stop: ^u8,
+		},
+		unknown: struct {
+			data1: rawptr,
+			data2: rawptr,
+		},
+	},
+}
+
+
+SEEK_SET :: 0; /**< Seek from the beginning of data */
+SEEK_CUR :: 1; /**< Seek relative to current read point */
+SEEK_END :: 2; /**< Seek relative to the end of data */
+
+@(default_calling_convention="c", link_prefix="SDL_")
+foreign lib {
+	RWFromFile     :: proc(file: cstring, mode: cstring) -> ^RWops ---
+	RWFromFP       :: proc(fp: rawptr, autoclose: bool) -> ^RWops ---
+	RWFromMem      :: proc(mem: rawptr, size: c.int) -> ^RWops ---
+	RWFromConstMem :: proc(mem: rawptr, size: c.int) -> ^RWops ---
+
+	AllocRW :: proc() -> ^RWops ---
+	FreeRW  :: proc(area: ^RWops) ---
+
+	RWsize  :: proc(ctx: ^RWops) -> i64 ---
+	RWseek  :: proc(ctx: ^RWops, offset: i64, whence: c.int) -> i64 ---
+	RWtell  :: proc(ctx: ^RWops) -> i64 ---
+	RWread  :: proc(ctx: ^RWops, ptr: rawptr, size: c.size_t, maxnum: c.size_t) -> c.size_t ---
+	RWwrite :: proc(ctx: ^RWops, size: c.size_t, num: c.size_t) -> c.size_t ---
+	RWclose :: proc(ctx: ^RWops) -> c.int ---
+
+	LoadFile_RW :: proc(src: ^RWops, datasize: c.size_t, freesrc: bool) -> rawptr ---
+	LoadFile    :: proc(file: rawptr, datasize: c.size_t) -> rawptr ---
+
+	ReadU8   :: proc(src: ^RWops) -> u8 ---
+	ReadLE16 :: proc(src: ^RWops) -> u16 ---
+	ReadBE16 :: proc(src: ^RWops) -> u16 ---
+	ReadLE32 :: proc(src: ^RWops) -> u32 ---
+	ReadBE32 :: proc(src: ^RWops) -> u32 ---
+	ReadLE64 :: proc(src: ^RWops) -> u64 ---
+	ReadBE64 :: proc(src: ^RWops) -> u64 ---
+
+	WriteU8   :: proc(dst: ^RWops, value: ^u8) -> c.size_t ---
+	WriteLE16 :: proc(dst: ^RWops, value: ^u16) -> c.size_t ---
+	WriteBE16 :: proc(dst: ^RWops, value: ^u16) -> c.size_t ---
+	WriteLE32 :: proc(dst: ^RWops, value: ^u32) -> c.size_t ---
+	WriteBE32 :: proc(dst: ^RWops, value: ^u32) -> c.size_t ---
+	WriteLE64 :: proc(dst: ^RWops, value: ^u64) -> c.size_t ---
+	WriteBE64 :: proc(dst: ^RWops, value: ^u64) -> c.size_t ---
+}