Hello i have the following piece of code that i want to transform in nim:
int utf8str_codepoint_len( char const* s, int utf8len ) {
int codepointLen = 0;
unsigned char m4 = 128 + 64 + 32 + 16;
unsigned char m3 = 128 + 64 + 32;
unsigned char m2 = 128 + 64;
for ( int i = 0; i < utf8len; ++ i, ++ codepointLen ) {
char c = s[i];
if ( ( c & m4 ) == m4 ) {
i += 3;
} else if ( ( c & m3 ) == m3 ) {
i += 2;
} else if ( ( c & m2 ) == m2 ) {
i += 1;
}
}
return ( codepointLen );
}
Run
I have this for the moment but it's doesn't compile:
proc utf8str_codepoint_len*(s: cstring; utf8len: cint): cint =
var codepointLen: cint = 0
var m4: cuchar = 128 + 64 + 32 + 16
var m3: cuchar = 128 + 64 + 32
var m2: cuchar = 128 + 64
var i: cint = 0
while i < utf8len:
var c: char = s[i]
if (c and m4) == m4:
inc(i, 3)
elif (c and m3) == m3:
inc(i, 2)
elif (c and m2) == m2:
inc(i, 1)
inc(i)
inc(codepointLen)
return codepointLen
Run
Should i keep it in c and import it nim ?
