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tf_snprintf: Add support for '%s'

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Change-Id: Ia3a159444e638f63de7dc5a6a4b76169c757188a
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
This commit is contained in:
Antonio Nino Diaz 2018-08-09 15:30:47 +01:00
parent 781842ea8a
commit 73bc6e77f1
1 changed files with 17 additions and 0 deletions
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17
common/tf_snprintf.c
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@ -8,6 +8,17 @@
#include <platform.h>
#include <stdarg.h>
static void string_print(char **s, size_t n, size_t *chars_printed,
const char *str)
{
while (*str) {
if (*chars_printed < n)
*(*s)++ = *str;
(*chars_printed)++;
str++;
}
}
static void unsigned_dec_print(char **s, size_t n, size_t *chars_printed,
unsigned int unum)
{
@ -32,6 +43,7 @@ static void unsigned_dec_print(char **s, size_t n, size_t *chars_printed,
* The following type specifiers are supported:
*
* %d or %i - signed decimal format
* %s - string format
* %u - unsigned decimal format
*
* The function panics on all other formats specifiers.
@ -45,6 +57,7 @@ int tf_snprintf(char *s, size_t n, const char *fmt, ...)
va_list args;
int num;
unsigned int unum;
char *str;
size_t chars_printed = 0;
if (n == 1) {
@ -79,6 +92,10 @@ int tf_snprintf(char *s, size_t n, const char *fmt, ...)
unsigned_dec_print(&s, n, &chars_printed, unum);
break;
case 's':
str = va_arg(args, char *);
string_print(&s, n, &chars_printed, str);
break;
case 'u':
unum = va_arg(args, unsigned int);
unsigned_dec_print(&s, n, &chars_printed, unum);