String length: Difference between revisions

module String_length {

A$=format$("J\u0332o\u0332s\u0332e\u0301\u0332")

Print Len(A$) = 9 ' true Utf-16LE

Print Len.Disp(A$) = 4 \\ display length

Buffer Clear Mem as Byte*100

\\ Write at memory at offset 0 or address Mem(0)

Return Mem, 0:=A$

Print Eval$(Mem, 0, 18)

For i=0 to 17 step 2

\\ print hex value and character

Hex Eval(Mem, i as integer), ChrCode$(Eval(Mem, i as integer))

Next i

Document B$=A$

\\ encode to utf-8 with BOM (3 bytes 0xEF,0xBB,0xBF)

Save.Doc B$, "Checklen.doc", 2

Print Filelen("Checklen.doc")=17

\\ So length is 14 bytes + 3 the BOM

Mem=Buffer("Checklen.doc")

Print len(Mem)=17 // len works for buffers too - unit byte

// version 12 can handle strings without suffix $

C=eval$(mem, 3, 14) // from 4th byte get 14 bytes in a string

Print len(C)*2=14 ' bytes // len()) for strings return double type of words (can return 0.5)

C=string$(C as utf8dec) ' decode bytes from utf8 to utf16LE

Print len(C)=9, C=A$, Len.Disp(C)=4

Print C

Report 2, C // proportional print on console - for text center justified rendering (2 - center)

}

String_length