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Obey POSIX on printf("%.s", (char*)NULL).

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* libc/stdio/vfprintf.c (_VFPRINTF_R): Take precision into account
for %s on NULL.  Skip NULL check when optimizing for size.
This commit is contained in:
Eric Blake
2007-09-17 20:14:29 +00:00
parent 8e34786463
commit ba21046d03
2 changed files with 18 additions and 5 deletions
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6
newlib/ChangeLog
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@@ -1,3 +1,9 @@
2007-09-17 Eric Blake <ebb9@byu.net>
Obey POSIX on printf("%.s", (char*)NULL).
* libc/stdio/vfprintf.c (_VFPRINTF_R): Take precision into account
for %s on NULL. Skip NULL check when optimizing for size.
2007-09-07 Jeff Johnston <jjohnstn@redhat.com>
* libc/include/sys/_types.h: Protect all types with flag

11
newlib/libc/stdio/vfprintf.c
View File

@@ -1029,10 +1029,17 @@ reswitch: switch (ch) {
case 'S':
#endif
sign = '\0';
if ((cp = GET_ARG (N, ap, char_ptr_t)) == NULL) {
cp = GET_ARG (N, ap, char_ptr_t);
#ifndef __OPTIMIZE_SIZE__
/* Behavior is undefined if the user passed a
NULL string when precision is not 0.
However, if we are not optimizing for size,
we might as well mirror glibc behavior. */
if (cp == NULL) {
cp = "(null)";
size = 6;
size = ((unsigned) prec > 6U) ? 6 : prec;
}
#endif /* __OPTIMIZE_SIZE__ */
#ifdef _MB_CAPABLE
else if (ch == 'S' || (flags & LONGINT)) {
mbstate_t ps;