int vbuf_write(VBUF *bp, const char *buf, int len)
{
int count;
const char *cp;
int n;
#if 0
for (count = 0; count < len; count++)
if (VBUF_PUT(bp, buf[count]) < 0)
break;
return (count);
#else
for (cp = buf, count = len; count > 0; cp += n, count -= n) {
if (bp->cnt <= 0 && bp->put_ready(bp) != 0)
break;
n = (count < bp->cnt ? count : bp->cnt);
memcpy(bp->ptr, cp, n);
bp->ptr += n;
bp->cnt -= n;
}
return (len - count);
#endif
}
VBUF *vbuf_print(VBUF *bp, const char *format, va_list ap)
{
const char *myname = "vbuf_print";
static VSTRING *fmt; /* format specifier */
unsigned char *cp;
int width; /* width and numerical precision */
int prec; /* are signed for overflow defense */
unsigned long_flag; /* long or plain integer */
int ch;
char *s;
size_t size; /* APPLE */
/*
* Assume that format strings are short.
*/
if (fmt == 0)
fmt = vstring_alloc(INT_SPACE);
/*
* Iterate over characters in the format string, picking up arguments
* when format specifiers are found.
*/
for (cp = (unsigned char *) format; *cp; cp++) {
if (*cp != '%') {
VBUF_PUT(bp, *cp); /* ordinary character */
} else if (cp[1] == '%') {
VBUF_PUT(bp, *cp++); /* %% becomes % */
} else {
/*
* Handle format specifiers one at a time, since we can only deal
* with arguments one at a time. Try to determine the end of the
* format specifier. We do not attempt to fully parse format
* strings, since we are ging to let sprintf() do the hard work.
* In regular expression notation, we recognize:
*
* %-?0?([0-9]+|\*)?\.?([0-9]+|\*)?l?[a-zA-Z]
*
* which includes some combinations that do not make sense. Garbage
* in, garbage out.
*/
VSTRING_RESET(fmt); /* clear format string */
VSTRING_ADDCH(fmt, *cp++);
if (*cp == '-') /* left-adjusted field? */
VSTRING_ADDCH(fmt, *cp++);
if (*cp == '+') /* signed field? */
VSTRING_ADDCH(fmt, *cp++);
if (*cp == '0') /* zero-padded field? */
VSTRING_ADDCH(fmt, *cp++);
if (*cp == '*') { /* dynamic field width */
width = va_arg(ap, int);
VSTRING_ADDNUM(fmt, width);
cp++;
} else { /* hard-coded field width */
for (width = 0; ch = *cp, ISDIGIT(ch); cp++) {
width = width * 10 + ch - '0';
VSTRING_ADDCH(fmt, ch);
}
}
if (width < 0) {
msg_warn("%s: bad width %d in %.50s", myname, width, format);
width = 0;
}
if (*cp == '.') /* width/precision separator */
VSTRING_ADDCH(fmt, *cp++);
if (*cp == '*') { /* dynamic precision */
prec = va_arg(ap, int);
VSTRING_ADDNUM(fmt, prec);
cp++;
} else { /* hard-coded precision */
int vbuf_put(VBUF *bp, int ch)
{
return (bp->put_ready(bp) ? VBUF_EOF : VBUF_PUT(bp, ch));
}