Odin/code/demo.odin

// #import "fmt.odin"
#import "utf8.odin"

when ODIN_OS == "window" {
	when ODIN_OS != "window" {
	} else {
		MAX :: 64
	}
	#import "fmt.odin"
} else {

}


main :: proc() {
	when true {
		OffsetType :: type int
	}

	// MAX :: 64
	buf:     [MAX]rune
	backing: [MAX]byte
	offset:  OffsetType


	msg := "Hello"
	count := utf8.rune_count(msg)
	assert(count <= MAX)
	runes := buf[:count]

	offset = 0
	for i := 0; i < count; i++ {
		s := msg[offset:]
		r, len := utf8.decode_rune(s)
		runes[count-i-1] = r
		offset += len as OffsetType
	}

	offset = 0
	for i := 0; i < count; i++ {
		data, len := utf8.encode_rune(runes[i])
		copy(backing[offset:], data[:len])
		offset += len as OffsetType
	}

	reverse := backing[:offset] as string
	fmt.println(reverse) // olleH
}