Re: [PATCH 1/5] lib: string.c: Added a function strzcpy

[Joe Perches <joe@perches.com>]

On Sun, 2014-10-19 at 00:03 +0200, Rickard Strandqvist wrote:
> Added a function strzcpy which works the same as strncpy,
> but guaranteed to produce the trailing null character.
> 
> There are many places in the code where strncpy used although it
> must be zero terminated, and switching to strlcpy is not an option
> because the string must nonetheless be fyld with zero characters.
[]
> diff --git a/lib/string.c b/lib/string.c
[]
> +char *strzcpy(char *dest, const char *src, size_t count)
> +{
> +	char *tmp = dest;
> +
> +	while (count) {
> +		if ((*tmp = *src) != 0)
> +			src++;
> +		tmp++;
> +		count--;
> +	}
> +
> +	if (dest != tmp)
> +		*--tmp = '\0';
> +
> +	return dest;
> +}

why not

char *strzcpy(char *dest, const char *src, size_t count)
{
	strncpy(dest, src, count)
	if (count)
		dest[count - 1] = 0; /* or '\0' or whatever */

	return dest;
}

maybe use static inline too.