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// -----------------------------------------------------------------------
// reader
#if 0
rune
bufio·getrune(io·Buffer *buf)
{
ubyte b;
int i;
byte str[UTFmax+1];
rune r;
// NOTE: I'm worried about the sign here...
b = bufio·getbyte(buf);
if (b < RuneSelf) {
buf->runesize = 1;
return b;
}
i = 0;
str[i++] = b;
nextbyte:
b = bufio·getbyte(buf);
if (b < 0) return b;
if (i >= arrlen(str)) return RuneErr;
str[i++] = b;
if (!utf8·fullrune(str, i))
goto nextbyte;
buf->runesize = utf8·bytetorune(&r, str);
if (r == RuneErr && b == 1) {
errorf("illegal UTF-8 sequence");
for (; i >= 0; i--)
errorf("%s%.2x", i > 0 ? " " : "", *(ubyte*)(str+i));
errorf("\n");
buf->runesize = 0;
} else
for (; i > buf->runesize; i--)
bufio·ungetbyte(buf, str[i]);
return r;
}
// TODO: Check that we are given the correct rune!
error
bufio·ungetrune(io·Buffer *buf, rune r)
{
if (buf->state & bufio·rdr) {
errorf("attempted to unget on non-active reader");
return bufio·err;
}
if (buf->pos == buf->buf) {
errorf("attempted to unget past end of buffer");
return bufio·err;
}
buf->pos -= buf->runesize;
return 0;
}
#endif
// -----------------------------------------------------------------------
// writer
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