/* public helper routine: fmt out a null terminated string already in hand */
int
fmtstrcpy(Fmt *f, char *s)
{
int p, i;
if(!s)
return _fmtcpy(f, "<nil>", 5, 5);
/* if precision is specified, make sure we don't wander off the end */
if(f->flags & FmtPrec){
p = f->prec;
for(i = 0; i < p; i++)
if(s[i] == 0)
break;
return _fmtcpy(f, s, utfnlen(s, i), i); /* BUG?: won't print a partial rune at end */
}
return _fmtcpy(f, s, utflen(s), strlen(s));
}
int
errfmt(Fmt *f)
{
char buf[ERRMAX];
rerrstr(buf, sizeof buf);
return _fmtcpy(f, buf, utflen(buf), strlen(buf));
}
/* public helper routine: fmt out a null terminated string already in hand */
int
fmtstrcpy(Fmt *f, char *s)
{
int i, j;
Rune r;
if(!s)
return _fmtcpy(f, "<nil>", 5, 5);
/* if precision is specified, make sure we don't wander off the end */
if(f->flags & FmtPrec){
i = 0;
for(j=0; j<f->prec && s[i]; j++)
i += chartorune(&r, s+i);
return _fmtcpy(f, s, j, i);
}
return _fmtcpy(f, s, utflen(s), strlen(s));
}
/* fmt out one character */
int
_charfmt(Fmt *f)
{
char x[1];
x[0] = va_arg(f->args, int);
f->prec = 1;
return _fmtcpy(f, x, 1, 1);
}
int
_floatfmt(Fmt *fmt, double f)
{
char s[FDIGIT+10];
xdtoa(fmt, s, f);
fmt->flags &= FmtWidth|FmtLeft;
_fmtcpy(fmt, s, strlen(s), strlen(s));
return 0;
}
int
_floatfmt(Fmt *fmt, double f)
{
char s[1+NEXP10+1+FDIGIT+1];
/*
* The max length of a %f string is
* '[+-]'+"max exponent"+'.'+"max precision"+'\0'
* which is 341 currently.
*/
xdtoa(fmt, s, f);
fmt->flags &= FmtWidth|FmtLeft;
_fmtcpy(fmt, s, strlen(s), strlen(s));
return 0;
}
/* public helper routine: fmt out a null terminated rune string already in hand */
int
fmtrunestrcpy(Fmt *f, Rune *s)
{
Rune *e;
int n, p;
if(!s)
return _fmtcpy(f, "<nil>", 5, 5);
/* if precision is specified, make sure we don't wander off the end */
if(f->flags & FmtPrec){
p = f->prec;
for(n = 0; n < p; n++)
if(s[n] == 0)
break;
}else{
for(e = s; *e; e++)
;
n = e - s;
}
return _fmtrcpy(f, s, n);
}