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-rw-r--r--libio/bits/stdio.h53
1 files changed, 23 insertions, 30 deletions
diff --git a/libio/bits/stdio.h b/libio/bits/stdio.h
index a3e3d6fc8d..8a15c6e6a6 100644
--- a/libio/bits/stdio.h
+++ b/libio/bits/stdio.h
@@ -127,48 +127,41 @@ ferror_unlocked (FILE *__stream) __THROW
#if defined __USE_MISC && defined __GNUC__ && defined __OPTIMIZE__
/* Perform some simple optimizations. */
# define fread_unlocked(ptr, size, n, stream) \
- (__extension__ ((((__builtin_constant_p (size) \
- && ((size) == 0 || __builtin_constant_p (n))) \
- || (__builtin_constant_p (n) && (n) == 0)) \
- && (size_t) ((size) * (n)) <= 8) \
+ (__extension__ ((__builtin_constant_p (size) && __builtin_constant_p (n) \
+ && (size_t) ((size) * (n)) <= 8 && (size) != 0) \
? ({ char *__ptr = (char *) (ptr); \
FILE *__stream = (stream); \
- size_t __size = (size); \
- size_t __n = (n); \
- size_t __readres = __n; \
- size_t __cnt = __size * __n + 1; \
- while (--__cnt > 0) \
+ size_t __cnt; \
+ for (__cnt = (size) * (n); __cnt > 0; --__cnt) \
{ \
int __c = _IO_getc_unlocked (__stream); \
if (__c == EOF) \
- { \
- __readres = (__size * __n - __cnt) / __size; \
- break; \
- } \
+ break; \
*__ptr++ = __c; \
} \
- __readres; }) \
- : fread_unlocked (ptr, size, n, stream)))
+ ((size_t) ((size) * (n)) - __cnt) / (size); }) \
+ : (((__builtin_constant_p (size) && (size) == 0) \
+ || (__builtin_constant_p (n) && (n) == 0)) \
+ /* Evaluate all parameters once. */ \
+ ? ((void) (ptr), (void) (stream), (void) (size), \
+ (void) n, 0) \
+ : fread_unlocked (ptr, size, n, stream))))
# define fwrite_unlocked(ptr, size, n, stream) \
- (__extension__ ((((__builtin_constant_p (size) \
- && ((size) == 0 || __builtin_constant_p (n))) \
- || (__builtin_constant_p (n) && (n) == 0)) \
- && (size_t) ((size) * (n)) <= 8) \
+ (__extension__ ((__builtin_constant_p (size) && __builtin_constant_p (n) \
+ && (size_t) ((size) * (n)) <= 8 && (size) != 0) \
? ({ const char *__ptr = (const char *) (ptr); \
FILE *__stream = (stream); \
- size_t __size = (size); \
- size_t __n = (n); \
- size_t __writeres = __n; \
- size_t __cnt = __size * __n + 1; \
- while (--__cnt > 0) \
+ size_t __cnt; \
+ for (__cnt = (size) * (n); __cnt > 0; --__cnt) \
if (_IO_putc_unlocked (*__ptr++, __stream) == EOF) \
- { \
- __writeres = (__size * __n - __cnt) / __size; \
- break; \
- } \
- __writeres; }) \
- : fwrite_unlocked (ptr, size, n, stream)))
+ break; \
+ ((size_t) ((size) * (n)) - __cnt) / (size); }) \
+ : (((__builtin_constant_p (size) && (size) == 0) \
+ || (__builtin_constant_p (n) && (n) == 0)) \
+ /* Evaluate all parameters once. */ \
+ ? ((void) (ptr), (void) (stream), (void) (size), n) \
+ : fwrite_unlocked (ptr, size, n, stream))))
#endif
/* Define helper macro. */