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efi_selftest: support printing leading zeroes

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Allow specifying the precision when printing integers, e.g.

efi_st_printf("%.4u-%.2u-%.2u\n", year, month, day);

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-07-07 23:39:15 +02:00 committed by Alexander Graf
parent 49de24559d
commit 42e2b563f6
1 changed files with 22 additions and 11 deletions
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23
lib/efi_selftest/efi_selftest_console.c
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@ -71,10 +71,11 @@ static void pointer(void *pointer, u16 **buf)
* Print an unsigned 32bit value as decimal number to an u16 string
*
* @value: value to be printed
* @prec: minimum number of digits to display
* @buf: pointer to buffer address
* on return position of terminating zero word
*/
static void uint2dec(u32 value, u16 **buf)
static void uint2dec(u32 value, int prec, u16 **buf)
{
u16 *pos = *buf;
int i;
@ -93,7 +94,7 @@ static void uint2dec(u32 value, u16 **buf)
for (i = 0; i < 10; ++i) {
/* Write current digit */
c = f >> 60;
if (c || pos != *buf)
if (c || pos != *buf || 10 - i <= prec)
*pos++ = c + '0';
/* Eliminate current digit */
f &= 0xfffffffffffffff;
@ -110,10 +111,11 @@ static void uint2dec(u32 value, u16 **buf)
* Print a signed 32bit value as decimal number to an u16 string
*
* @value: value to be printed
* @prec: minimum number of digits to display
* @buf: pointer to buffer address
* on return position of terminating zero word
*/
static void int2dec(s32 value, u16 **buf)
static void int2dec(s32 value, int prec, u16 **buf)
{
u32 u;
u16 *pos = *buf;
@ -124,7 +126,7 @@ static void int2dec(s32 value, u16 **buf)
} else {
u = value;
}
uint2dec(u, &pos);
uint2dec(u, prec, &pos);
*buf = pos;
}
@ -143,6 +145,7 @@ void efi_st_printc(int color, const char *fmt, ...)
u16 *pos = buf;
const char *s;
u16 *u;
int prec;
va_start(args, fmt);
@ -172,12 +175,20 @@ void efi_st_printc(int color, const char *fmt, ...)
break;
case '%':
++c;
/* Parse precision */
if (*c == '.') {
++c;
prec = *c - '0';
++c;
} else {
prec = 0;
}
switch (*c) {
case '\0':
--c;
break;
case 'd':
int2dec(va_arg(args, s32), &pos);
int2dec(va_arg(args, s32), prec, &pos);
break;
case 'p':
++c;
@ -209,7 +220,7 @@ void efi_st_printc(int color, const char *fmt, ...)
*pos++ = *s;
break;
case 'u':
uint2dec(va_arg(args, u32), &pos);
uint2dec(va_arg(args, u32), prec, &pos);
break;
default:
break;