diff options
Diffstat (limited to 'string/bits/string2.h')
| -rw-r--r-- | string/bits/string2.h | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/string/bits/string2.h b/string/bits/string2.h index 0d378039fe..8051c48162 100644 --- a/string/bits/string2.h +++ b/string/bits/string2.h @@ -85,11 +85,12 @@ __STRING2_COPY_TYPE (8); # undef __STRING2_COPY_TYPE #endif -/* Dereferencing a pointer arg to run sizeof on it fails for the - void pointer case, so we use this instead. Note that the argument - must not contain any side effects. */ -#define __string2_1bptr_p(x) (((size_t) ((x) + 1) - (size_t) (x)) == 1) - +/* Dereferencing a pointer arg to run sizeof on it fails for the void + pointer case, so we use this instead. + Note that __x is evaluated twice. */ +#define __string2_1bptr_p(__x) \ + (({ const void *__a, *__b; __a = (__x) + 1; __b = (__x); \ + (size_t)__a - (size_t)__b; }) == 1) /* Set N bytes of S to C. */ #ifndef _HAVE_STRING_ARCH_memset @@ -862,12 +863,17 @@ __strsep_g (char **__s, __const char *__reject) # endif #endif +/* We need the memory allocation functions for inline strdup(). + Referring to stdlib.h (even minimally) is not allowed if + __STRICT_ANSI__. */ +#ifndef __STRICT_ANSI__ -#if !defined _HAVE_STRING_ARCH_strdup && !defined __STRICT_ANSI__ - -/* We need the memory allocation functions. Including this header is - not allowed. */ +#if !defined _HAVE_STRING_ARCH_strdup || !defined _HAVE_STRING_ARCH_strndup +# define __need_malloc_and_calloc # include <stdlib.h> +#endif + +#ifndef _HAVE_STRING_ARCH_strdup # define __strdup(s) \ (__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \ @@ -885,12 +891,7 @@ __strsep_g (char **__s, __const char *__reject) # endif #endif - -#if !defined _HAVE_STRING_ARCH_strndup && !defined __STRICT_ANSI__ - -/* We need the memory allocation functions. Including this header is - not allowed. */ -# include <stdlib.h> +#ifndef _HAVE_STRING_ARCH_strndup # define __strndup(s, n) \ (__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \ @@ -916,6 +917,7 @@ __strsep_g (char **__s, __const char *__reject) # endif #endif +#endif /* Strict ANSI */ #undef __STRING_INLINE |