static int mapUTF8(Unicode u, char *buf, int bufSize) {
if (u <= 0x0000007f) {
if (bufSize < 1) {
return 0;
}
buf[0] = (char)u;
return 1;
} else if (u <= 0x000007ff) {
if (bufSize < 2) {
return 0;
}
buf[0] = (char)(0xc0 + (u >> 6));
buf[1] = (char)(0x80 + (u & 0x3f));
return 2;
} else if (u <= 0x0000ffff) {
if (bufSize < 3) {
return 0;
}
buf[0] = (char)(0xe0 + (u >> 12));
buf[1] = (char)(0x80 + ((u >> 6) & 0x3f));
buf[2] = (char)(0x80 + (u & 0x3f));
return 3;
} else if (u <= 0x0010ffff) {
if (bufSize < 4) {
return 0;
}
buf[0] = (char)(0xf0 + (u >> 18));
buf[1] = (char)(0x80 + ((u >> 12) & 0x3f));
buf[2] = (char)(0x80 + ((u >> 6) & 0x3f));
buf[3] = (char)(0x80 + (u & 0x3f));
return 4;
} else {
return 0;
}
}
static int mapUCS2(Unicode u, char *buf, int bufSize) {
if (u <= 0xffff) {
if (bufSize < 2) {
return 0;
}
buf[0] = (char)((u >> 8) & 0xff);
buf[1] = (char)(u & 0xff);
return 2;
} else {
return 0;
}
}