diff options
Diffstat (limited to 'stdio-common/vfscanf.c')
| -rw-r--r-- | stdio-common/vfscanf.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/stdio-common/vfscanf.c b/stdio-common/vfscanf.c index 106c62b8e0..4780f51021 100644 --- a/stdio-common/vfscanf.c +++ b/stdio-common/vfscanf.c @@ -163,8 +163,7 @@ int __vfscanf (FILE *s, const char *format, va_list argptr) #endif { - va_list arg = (va_list) argptr; - + va_list arg; register const char *f = format; register unsigned char fc; /* Current character of the format. */ register size_t done = 0; /* Assignments done. */ @@ -224,6 +223,12 @@ __vfscanf (FILE *s, const char *format, va_list argptr) } \ while (0) +#ifdef __va_copy + __va_copy (arg, argptr); +#else + arg = (va_list) argptr; +#endif + ARGCHECK (s, format); /* Figure out the decimal point character. */ @@ -245,23 +250,34 @@ __vfscanf (FILE *s, const char *format, va_list argptr) /* Extract the next argument, which is of type TYPE. For a %N$... spec, this is the Nth argument from the beginning; otherwise it is the next argument after the state now in ARG. */ -#if 0 - /* XXX Possible optimization. */ +#ifdef __va_copy # define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ + ({ unsigned int pos = argpos; \ + va_list arg; \ + __va_copy (arg, argptr); \ + while (--pos > 0) \ + (void) va_arg (arg, void *); \ + va_arg (arg, type); \ + })) +#else +# if 0 + /* XXX Possible optimization. */ +# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ ({ va_list arg = (va_list) argptr; \ arg = (va_list) ((char *) arg \ + (argpos - 1) \ * __va_rounded_size (void *)); \ va_arg (arg, type); \ })) -#else -# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ +# else +# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \ ({ unsigned int pos = argpos; \ va_list arg = (va_list) argptr; \ while (--pos > 0) \ (void) va_arg (arg, void *); \ va_arg (arg, type); \ })) +# endif #endif if (!isascii (*f)) |