On Fri, Mar 27, 2015 at 11:01:27AM +0100, Pavel Hrdina wrote:
> Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
> ---
> tools/virsh.h | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 52 insertions(+)
>
> diff --git a/tools/virsh.h b/tools/virsh.h
> index df2ea7f..fde20ef 100644
> --- a/tools/virsh.h
> +++ b/tools/virsh.h
> @@ -474,4 +474,56 @@ char *_vshStrdup(vshControl *ctl, const char *s, const char *filename,
> # define VSH_EXCLUSIVE_OPTIONS_VAR(VARNAME1, VARNAME2) \
> VSH_EXCLUSIVE_OPTIONS_EXPR(#VARNAME1, VARNAME1, #VARNAME2, VARNAME2)
>
> +/* Macros to help dealing with required options. */
> +
> +/* VSH_REQUIRE_OPTION_EXPR:
> + *
> + * @NAME1: String containing the name of the option.
> + * @EXPR1: Expression to validate the variable (boolean variable).
> + * @NAME2: String containing the name of required option.
> + * @EXPR2: Expression to validate the variable (boolean variable).
> + *
> + * Check if required command options in virsh was set. Use the
> + * provided expression to check the variables.
> + *
> + * This helper does an early return and therefore it has to be called
> + * before anything that would require cleanup.
> + */
> +# define VSH_REQUIRE_OPTION_EXPR(NAME1, EXPR1, NAME2, EXPR2) \
> + if ((EXPR1) && !(EXPR2)) { \
> + vshError(ctl, _("Option --%s is required by option --%s"), \
> + NAME2, NAME1); \
> + return false; \
> + }
It would be better to protect this within a "do { ... } while (0)"
statement.
-Jeff
> +
> +/* VSH_REQUIRE_OPTION:
> + *
> + * @NAME1: String containing the name of the option.
> + * @NAME2: String containing the name of required option.
> + *
> + * Check if required command options in virsh was set. Use the
> + * vshCommandOptBool call to request them.
> + *
> + * This helper does an early return and therefore it has to be called
> + * before anything that would require cleanup.
> + */
> +# define VSH_REQUIRE_OPTION(NAME1, NAME2) \
> + VSH_REQUIRE_OPTION_EXPR(NAME1, vshCommandOptBool(cmd, NAME1), \
> + NAME2, vshCommandOptBool(cmd, NAME2))
> +
> +/* VSH_REQUIRE_OPTION_VAR:
> + *
> + * @VARNAME1: Boolean variable containing the value of the option of same name.
> + * @VARNAME2: Boolean variable containing the value of required option of
> + * same name.
> + *
> + * Check if required command options in virsh was set. Check in variables
> + * that contain the value and have same name as the option.
> + *
> + * This helper does an early return and therefore it has to be called
> + * before anything that would require cleanup.
> + */
> +# define VSH_REQUIRE_OPTION_VAR(VARNAME1, VARNAME2) \
> + VSH_REQUIRE_OPTION_EXPR(#VARNAME1, VARNAME1, #VARNAME2, VARNAME2)
> +
> #endif /* VIRSH_H */
> --
> 2.0.5
>
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