Re: [FFmpeg-devel] [PATCH 1/3] fftools/cmdutils: Add function to report error before exit

[James Almer <jamrial@gmail.com>]

On 8/27/2022 10:55 AM, Andreas Rheinhardt wrote:
> This is designed to improve and unify error handling for
> allocation failures for the many (often small) allocations that we have
> in the fftools. These typically either don't return an error message
> or an error message that is not really helpful to the user
> and can be replaced by a generic error message without loss of
> information.
> 
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
> ---
>   fftools/cmdutils.c |  6 ++++++
>   fftools/cmdutils.h | 11 +++++++++++
>   2 files changed, 17 insertions(+)
> 
> diff --git a/fftools/cmdutils.c b/fftools/cmdutils.c
> index 18e768b386..b6f5c01ca3 100644
> --- a/fftools/cmdutils.c
> +++ b/fftools/cmdutils.c
> @@ -90,6 +90,12 @@ void register_exit(void (*cb)(int ret))
>       program_exit = cb;
>   }
>   
> +void report_error_then_exit_program(int ret)

Maybe report_and_exit instead. report_error_then_exit_program is IMO too 
long.

> +{
> +    av_log(NULL, AV_LOG_FATAL, "%s\n", av_err2str(ret));
> +    exit_program(AVUNERROR(ret));
> +}
> +
>   void exit_program(int ret)
>   {
>       if (program_exit)
> diff --git a/fftools/cmdutils.h b/fftools/cmdutils.h
> index d87e162ccd..358f0a0ef9 100644
> --- a/fftools/cmdutils.h
> +++ b/fftools/cmdutils.h
> @@ -54,6 +54,17 @@ extern int hide_banner;
>    */
>   void register_exit(void (*cb)(int ret));
>   
> +/**
> + * Reports an error corresponding to the provided
> + * AVERROR code and calls exit_program() with the
> + * corresponding POSIX error code.
> + * @note ret must be an AVERROR-value of a POSIX error code
> + *       (i.e. AVERROR(EFOO) and not AVERROR_FOO).
> + *       library functions can return both, so call this only
> + *       with AVERROR(EFOO) of your own.
> + */
> +void report_error_then_exit_program(int ret) av_noreturn;
> +
>   /**
>    * Wraps exit with a program-specific cleanup routine.
>    */
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