diff options
Diffstat (limited to 'libio/bits')
| -rw-r--r-- | libio/bits/stdio.h | 53 |
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. */ |