[CRIU] [PATCH 1/7] util: Introduce strstartswith helper

[Cyrill Gorcunov]

On Thu, May 08, 2014 at 05:07:23PM +0400, Pavel Emelyanov wrote:
> Signed-off-by: Pavel Emelyanov <xemul at parallels.com>
> ---
>  include/util.h | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/include/util.h b/include/util.h
> index c4b8e69..40dd1dc 100644
> --- a/include/util.h
> +++ b/include/util.h
> @@ -277,4 +277,22 @@ extern int read_fd_link(int lfd, char *buf, size_t size);
>  
>  int vaddr_to_pfn(unsigned long vaddr, u64 *pfn);
>  
> +/*
> + * Check whether @str starts with @sub
> + */
> +static inline bool strstartswith(char *str, char *sub)
> +{
> +	while (1) {
> +		if (*sub == '\0') /* end of sub -- match */
> +			return true;
> +		if (*str == '\0') /* end of str, sub is NOT ended -- miss */
> +			return false;
> +		if (*str != *sub)
> +			return false;
> +
> +		str++;
> +		sub++;
> +	}
> +}

Don't you rather compare two strings? Why not to use strcmp here?