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-rw-r--r--lib/vsprintf.c33
1 files changed, 14 insertions, 19 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 9287e2549936..39c99fea7c03 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -2017,7 +2017,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
s16 field_width;
bool is_sign;
- while (*fmt && *str) {
+ while (*fmt) {
/* skip any white space in format */
/* white space in format matchs any amount of
* white space, including none, in the input.
@@ -2042,6 +2042,8 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
* advance both strings to next white space
*/
if (*fmt == '*') {
+ if (!*str)
+ break;
while (!isspace(*fmt) && *fmt != '%' && *fmt)
fmt++;
while (!isspace(*str) && *str)
@@ -2070,7 +2072,17 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
}
}
- if (!*fmt || !*str)
+ if (!*fmt)
+ break;
+
+ if (*fmt == 'n') {
+ /* return number of characters read so far */
+ *va_arg(args, int *) = str - buf;
+ ++fmt;
+ continue;
+ }
+
+ if (!*str)
break;
base = 10;
@@ -2103,13 +2115,6 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
num++;
}
continue;
- case 'n':
- /* return number of characters read so far */
- {
- int *i = (int *)va_arg(args, int*);
- *i = str - buf;
- }
- continue;
case 'o':
base = 8;
break;
@@ -2210,16 +2215,6 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
str = next;
}
- /*
- * Now we've come all the way through so either the input string or the
- * format ended. In the former case, there can be a %n at the current
- * position in the format that needs to be filled.
- */
- if (*fmt == '%' && *(fmt + 1) == 'n') {
- int *p = (int *)va_arg(args, int *);
- *p = str - buf;
- }
-
return num;
}
EXPORT_SYMBOL(vsscanf);