[PATCH v4] telemetry: remove non-portable array initialization syntax

[Bruce Richardson]

On Tue, Apr 04, 2023 at 11:09:16AM -0700, Tyler Retzlaff wrote:
> Use of ranges in designated initialization are a non-standard gcc
> extension.
> 
> Only initialize '_' and '/' elements of the array and filter tests
> of characters through name with standard C isalnum before checking
> the array.
> 
> Suggested-by: Konstantin Ananyev <konstantin.ananyev at huawei.com>
> Suggested-by: Bruce Richardson <bruce.richardson at intel.com>
> Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>

Acked-by: Bruce Richardson <bruce.richardson at intel.com>

The array should probably be "static", which was a miss in the original
version too.

> ---
>  lib/telemetry/telemetry_data.c | 16 +++++++---------
>  1 file changed, 7 insertions(+), 9 deletions(-)
> 
> diff --git a/lib/telemetry/telemetry_data.c b/lib/telemetry/telemetry_data.c
> index 2bac2de..0dc091a 100644
> --- a/lib/telemetry/telemetry_data.c
> +++ b/lib/telemetry/telemetry_data.c
> @@ -2,6 +2,7 @@
>   * Copyright(c) 2020 Intel Corporation
>   */
>  
> +#include <ctype.h>
>  #include <errno.h>
>  #include <stdlib.h>
>  #include <inttypes.h>
> @@ -152,17 +153,14 @@
>  static bool
>  valid_name(const char *name)
>  {
> -	char allowed[128] = {
> -			['0' ... '9'] = 1,
> -			['A' ... 'Z'] = 1,
> -			['a' ... 'z'] = 1,
> -			['_'] = 1,
> -			['/'] = 1,
> -	};
> -	while (*name != '\0') {
> +	/* non-alpha-numeric characters allowed in names */
> +	const char allowed[128] = { ['_'] = 1, ['/'] = 1 };
> +
> +	for (; *name != '\0'; name++) {
> +		if (isalnum(*name))
> +			continue;
>  		if ((size_t)*name >= RTE_DIM(allowed) || allowed[(int)*name] == 0)
>  			return false;
> -		name++;
>  	}
>  	return true;
>  }
> -- 
> 1.8.3.1
>