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2006-04-21 Yoshinori K. Okuji <okuji@enbug.org>

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* kern/misc.c (grub_lltoa): New function.
        (grub_vsprintf): Added support for the long long suffix,
        i.e. "ll".
This commit is contained in:
okuji 2006-04-21 16:35:23 +00:00
parent ff04ec24e9
commit 970d3b8ab0
2 changed files with 81 additions and 6 deletions
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6
ChangeLog
View file

@ -1,3 +1,9 @@
2006-04-21 Yoshinori K. Okuji <okuji@enbug.org>
* kern/misc.c (grub_lltoa): New function.
(grub_vsprintf): Added support for the long long suffix,
i.e. "ll".
2006-04-20 Hollis Blanchard <hollis@penguinppc.org>
* Makefile.in (LDFLAGS): Add variable.

81
kern/misc.c
View file

@ -499,6 +499,58 @@ grub_itoa (char *str, int c, unsigned n)
return p;
}
/* Convert a long long value to a string. This function avoids 64-bit
modular arithmetic or divisions. */
static char *
grub_lltoa (char *str, int c, unsigned long long n)
{
unsigned base = (c == 'x') ? 16 : 10;
char *p;
if ((long long) n < 0 && c == 'd')
{
n = (unsigned long long) (-((long long) n));
*str++ = '-';
}
p = str;
if (base == 16)
do
{
unsigned d = (unsigned) (n & 0xf);
*p++ = (d > 9) ? d + 'a' - 10 : d + '0';
}
while (n >>= 4);
else
/* BASE == 10 */
do
{
unsigned high, low;
unsigned high_mod, low_mod;
unsigned d;
high = (unsigned) (n >> 32);
low = (unsigned) (n & 0xffffffff);
high_mod = high % 10;
low_mod = low % 10;
/* 6 = (1 << 32) % 10 */
d = (high_mod * 6 + low_mod) % 10;
*p++ = d + '0';
/* (HIGH_MOD << 31) / 5 = (HIGH_MOD << 32) / 10 */
n = (((unsigned long long) (high / 10) << 32)
+ ((high_mod << 31) / 5)
+ low_mod / 10);
}
while (n);
*p = 0;
grub_reverse (str);
return p;
}
static char *
grub_ftoa (char *str, double f, int round)
{
@ -555,7 +607,7 @@ grub_vsprintf (char *str, const char *fmt, va_list args)
write_char (c);
else
{
char tmp[16];
char tmp[32];
char *p;
unsigned int format1 = 0;
unsigned int format2 = 3;
@ -563,6 +615,7 @@ grub_vsprintf (char *str, const char *fmt, va_list args)
int rightfill = 0;
int n;
int longfmt = 0;
int longlongfmt = 0;
if (*fmt && *fmt =='-')
{
@ -606,6 +659,11 @@ grub_vsprintf (char *str, const char *fmt, va_list args)
{
longfmt = 1;
c = *fmt++;
if (c == 'l')
{
longlongfmt = 1;
c = *fmt++;
}
}
switch (c)
@ -613,16 +671,27 @@ grub_vsprintf (char *str, const char *fmt, va_list args)
case 'p':
write_str ("0x");
c = 'x';
longlongfmt = (sizeof (void *) == sizeof (long long));
/* fall through */
case 'x':
case 'u':
case 'd':
if (longfmt)
n = va_arg (args, long);
if (longlongfmt)
{
long long ll;
ll = va_arg (args, long long);
grub_lltoa (tmp, c, ll);
}
else
n = va_arg (args, int);
grub_itoa (tmp, c, n);
if (!rightfill && grub_strlen (tmp) < format1)
{
if (longfmt)
n = va_arg (args, long);
else
n = va_arg (args, int);
grub_itoa (tmp, c, n);
}
if (! rightfill && grub_strlen (tmp) < format1)
write_fill (zerofill, format1 - grub_strlen (tmp));
write_str (tmp);
if (rightfill && grub_strlen (tmp) < format1)