{
char *tail;
unsigned long val;
- size_t len;
*res = 0;
- len = strlen(cp);
- if (len == 0)
+ if (!*cp)
return -EINVAL;
val = simple_strtoul(cp, &tail, base);
if (tail == cp)
return -EINVAL;
- if ((*tail == '\0') ||
- ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
+ if ((tail[0] == '\0') || (tail[0] == '\n' && tail[1] == '\0')) {
*res = val;
return 0;
}
{
char *tail;
unsigned long long val;
- size_t len;
*res = 0;
- len = strlen(cp);
- if (len == 0)
+ if (!*cp)
return -EINVAL;
val = simple_strtoull(cp, &tail, base);
if (tail == cp)
return -EINVAL;
- if ((*tail == '\0') ||
- ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
+ if ((tail[0] == '\0') || (tail[0] == '\n' && tail[1] == '\0')) {
*res = val;
return 0;
}
* [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15]
* little endian output byte order is:
* [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15]
+ * - 'V' For a struct va_format which contains a format string * and va_list *,
+ * call vsnprintf(->format, *->va_list).
+ * Implements a "recursive vsnprintf".
+ * Do not use this feature without some mechanism to verify the
+ * correctness of the format string and va_list arguments.
*
* Note: The difference between 'S' and 'F' is that on ia64 and ppc64
* function pointers are really function descriptors, which contain a
char *pointer(const char *fmt, char *buf, char *end, void *ptr,
struct printf_spec spec)
{
- if (!ptr)
+ if (!ptr) {
+ /*
+ * Print (null) with the same width as a pointer so it makes
+ * tabular output look nice.
+ */
+ if (spec.field_width == -1)
+ spec.field_width = 2 * sizeof(void *);
return string(buf, end, "(null)", spec);
+ }
switch (*fmt) {
case 'F':
break;
case 'U':
return uuid_string(buf, end, ptr, spec, fmt);
+ case 'V':
+ return buf + vsnprintf(buf, end - buf,
+ ((struct va_format *)ptr)->fmt,
+ *(((struct va_format *)ptr)->va));
}
spec.flags |= SMALL;
if (spec.field_width == -1) {
- spec.field_width = 2*sizeof(void *);
+ spec.field_width = 2 * sizeof(void *);
spec.flags |= ZEROPAD;
}
spec.base = 16;
* @...: Arguments for the format string
*
* The return value is the number of characters written into @buf not including
- * the trailing '\0'. If @size is <= 0 the function returns 0.
+ * the trailing '\0'. If @size is == 0 the function returns 0.
*/
int scnprintf(char *buf, size_t size, const char *fmt, ...)
i = vsnprintf(buf, size, fmt, args);
va_end(args);
- return (i >= size) ? (size - 1) : i;
+ if (likely(i < size))
+ return i;
+ if (size != 0)
+ return size - 1;
+ return 0;
}
EXPORT_SYMBOL(scnprintf);