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Sync. printf() of libstand(3) with sys/kern/subr_prf.c.

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CVS r1.94	jhb:
Cast the integer read as the first argument for %b to an unsigned integer
so it's value is not sign extended when assigned to the uintmax_t variable
used internally by printf.  For example, if bit 31 is set in the cpuid
feature word, then %b would print out the initial value as a 16 character
hexadecimal value.  Now it only prints out an 8 character value.

CVS r1.109	njl:
Add support for 'h' and 'hh' modifiers for printf(9).

CVS r1.117	phk:
If we ignore an unknown % sequence, we must stop interpreting the remaining
% arguments because the varargs are now out of sync and there is a risk that
we might for instance dereference an integer in a %s argument.

SVN r209836	jkim:
Implement optional 'precision' for numbers.  Previously, it was parsed but
ignored.  Some third-party modules (e.g., APCICA) prefer this format over
zero padding flag '0'.
This commit is contained in:
Jung-uk Kim 2010-07-08 22:21:18 +00:00
parent 4624e08a59
commit 5cd8ebeb32
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=209837
1 changed files with 45 additions and 12 deletions
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57
lib/libstand/printf.c
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@ -159,10 +159,10 @@ kvprintf(char const *fmt, void (*func)(int), void *arg, int radix, va_list ap)
int ch, n;
uintmax_t num;
int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
int jflag, tflag, zflag;
int cflag, hflag, jflag, tflag, zflag;
int dwidth, upper;
char padc;
int retval = 0;
int stop = 0, retval = 0;
num = 0;
if (!func)
@ -179,7 +179,7 @@ kvprintf(char const *fmt, void (*func)(int), void *arg, int radix, va_list ap)
for (;;) {
padc = ' ';
width = 0;
while ((ch = (u_char)*fmt++) != '%') {
while ((ch = (u_char)*fmt++) != '%' || stop) {
if (ch == '\0')
return (retval);
PCHAR(ch);
@ -187,7 +187,7 @@ kvprintf(char const *fmt, void (*func)(int), void *arg, int radix, va_list ap)
percent = fmt - 1;
qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
sign = 0; dot = 0; dwidth = 0; upper = 0;
jflag = 0; tflag = 0; zflag = 0;
cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
reswitch: switch (ch = (u_char)*fmt++) {
case '.':
dot = 1;
@ -234,7 +234,7 @@ reswitch: switch (ch = (u_char)*fmt++) {
width = n;
goto reswitch;
case 'b':
num = va_arg(ap, int);
num = (u_int)va_arg(ap, int);
p = va_arg(ap, char *);
for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;)
PCHAR(*q--);
@ -278,6 +278,13 @@ reswitch: switch (ch = (u_char)*fmt++) {
base = 10;
sign = 1;
goto handle_sign;
case 'h':
if (hflag) {
hflag = 0;
cflag = 1;
} else
hflag = 1;
goto reswitch;
case 'j':
jflag = 1;
goto reswitch;
@ -297,6 +304,10 @@ reswitch: switch (ch = (u_char)*fmt++) {
*(va_arg(ap, long *)) = retval;
else if (zflag)
*(va_arg(ap, size_t *)) = retval;
else if (hflag)
*(va_arg(ap, short *)) = retval;
else if (cflag)
*(va_arg(ap, char *)) = retval;
else
*(va_arg(ap, int *)) = retval;
break;
@ -368,6 +379,10 @@ reswitch: switch (ch = (u_char)*fmt++) {
num = va_arg(ap, u_long);
else if (zflag)
num = va_arg(ap, size_t);
else if (hflag)
num = (u_short)va_arg(ap, int);
else if (cflag)
num = (u_char)va_arg(ap, int);
else
num = va_arg(ap, u_int);
goto number;
@ -382,6 +397,10 @@ reswitch: switch (ch = (u_char)*fmt++) {
num = va_arg(ap, long);
else if (zflag)
num = va_arg(ap, ssize_t);
else if (hflag)
num = (short)va_arg(ap, int);
else if (cflag)
num = (char)va_arg(ap, int);
else
num = va_arg(ap, int);
number:
@ -389,7 +408,8 @@ reswitch: switch (ch = (u_char)*fmt++) {
neg = 1;
num = -(intmax_t)num;
}
p = ksprintn(nbuf, num, base, &tmp, upper);
p = ksprintn(nbuf, num, base, &n, upper);
tmp = 0;
if (sharpflag && num != 0) {
if (base == 8)
tmp++;
@ -399,9 +419,13 @@ reswitch: switch (ch = (u_char)*fmt++) {
if (neg)
tmp++;
if (!ladjust && width && (width -= tmp) > 0)
while (width--)
PCHAR(padc);
if (!ladjust && padc == '0')
dwidth = width - tmp;
width -= tmp + MAX(dwidth, n);
dwidth -= n;
if (!ladjust)
while (width-- > 0)
PCHAR(' ');
if (neg)
PCHAR('-');
if (sharpflag && num != 0) {
@ -412,18 +436,27 @@ reswitch: switch (ch = (u_char)*fmt++) {
PCHAR('x');
}
}
while (dwidth-- > 0)
PCHAR('0');
while (*p)
PCHAR(*p--);
if (ladjust && width && (width -= tmp) > 0)
while (width--)
PCHAR(padc);
if (ladjust)
while (width-- > 0)
PCHAR(' ');
break;
default:
while (percent < fmt)
PCHAR(*percent++);
/*
* Since we ignore an formatting argument it is no
* longer safe to obey the remaining formatting
* arguments as the arguments will no longer match
* the format specs.
*/
stop = 1;
break;
}
}