On Wed, Oct 25, 2017 at 09:13:46PM -0400, John Arbuckle wrote:
> Prior the Mac OS 10.7, the function strnlen() was not available. This patch
> implements strnlen() on Mac OS X versions that are below 10.7.
>
> Signed-off-by: John Arbuckle <programmingkidx@xxxxxxxxx>
Applied, thanks.
> ---
> v4 changes:
> - Added check for definition of MAC_OS_X_VERSION_10_7
> - Renamed strnlen to fdt_strnlen
> - Added macro that defines strnlen as fdt_strnlen
>
> v3 changes:
> - Replaced loop with memchr()
>
> v2 changes:
> - Simplified the code to make it static inline'ed
> - Changed the type of count to size_t
>
> libfdt/libfdt_env.h | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/libfdt/libfdt_env.h b/libfdt/libfdt_env.h
> index 952056c..41fac04 100644
> --- a/libfdt/libfdt_env.h
> +++ b/libfdt/libfdt_env.h
> @@ -109,4 +109,31 @@ static inline fdt64_t cpu_to_fdt64(uint64_t x)
> #undef CPU_TO_FDT16
> #undef EXTRACT_BYTE
>
> +#ifdef __APPLE__
> +#include <AvailabilityMacros.h>
> +
> +/* strnlen() is not available on Mac OS < 10.7 */
> +# if !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED < \
> + MAC_OS_X_VERSION_10_7)
> +
> +#define strnlen fdt_strnlen
> +
> +/*
> + * fdt_strnlen: returns the length of a string or max_count - which ever is
> + * smallest.
> + * Input 1 string: the string whose size is to be determined
> + * Input 2 max_count: the maximum value returned by this function
> + * Output: length of the string or max_count (the smallest of the two)
> + */
> +static inline size_t fdt_strnlen(const char *string, size_t max_count)
> +{
> + const char *p = memchr(string, 0, max_count);
> + return p ? p - string : max_count;
> +}
> +
> +#endif /* !defined(MAC_OS_X_VERSION_10_7) || (MAC_OS_X_VERSION_MAX_ALLOWED <
> + MAC_OS_X_VERSION_10_7) */
> +
> +#endif /* __APPLE__ */
> +
> #endif /* _LIBFDT_ENV_H */
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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