Re: [PATCH 3/5] sandbox: parse libftdi options

[Sascha Hauer <s.hauer@pengutronix.de>]

On Tue, Oct 10, 2017 at 03:26:29PM +0300, Antony Pavlov wrote:
> Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
> ---
>  arch/sandbox/Makefile    |  2 +-
>  arch/sandbox/os/common.c | 12 ++++++--
>  arch/sandbox/os/ftdi.c   | 79 +++++++++++++++++++++++++++++++++++++++++++++++-
>  3 files changed, 89 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/sandbox/os/ftdi.c b/arch/sandbox/os/ftdi.c
> index 34e9165787..e3e46ed12d 100644
> --- a/arch/sandbox/os/ftdi.c
> +++ b/arch/sandbox/os/ftdi.c
> @@ -20,6 +20,7 @@
>  #include <unistd.h>
>  #include <ftdi.h>
>  #include <errno.h>
> +#include <string.h>
>  #include <mach/linux.h>
>  
>  #define FTDI_VID		0x0403	/* Vendor Id */
> @@ -38,6 +39,8 @@ struct ft2232_bitbang {
>  
>  static struct ft2232_bitbang ftbb;
>  
> +extern const char *libftdi_options;
> +
>  static inline int ftdi_flush(struct ftdi_context *ftdi)
>  {
>  	uint8_t buf[1];
> @@ -116,6 +119,67 @@ void barebox_libftdi1_gpio_set_value(struct ft2232_bitbang *ftbb,
>  		ftbb->odata &= ~BIT(off);
>  }
>  
> +/* This is a somewhat hacked function similar in some ways to strtok().
> + * It will look for needle with a subsequent '=' in haystack, return a copy of
> + * needle and remove everything from the first occurrence of needle to the next
> + * delimiter from haystack.
> + */
> +static char *extract_param(const char *const *haystack, const char *needle,
> +			const char *delim)
> +{

Parsing comma separated option lists is something we do more than once.
Right now we already have parseopt_b and parseopt_hu. Would be nice to
have this function alongside with the existing functions. Also
parseopt_* look simpler to follow, it may be worth adopting the code for
this function.

Sascha

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