On Fri, Mar 11, 2011 at 5:13 PM, Jason Gerecke <[email protected]> wrote:
> Have it return true/false to indicate conversion success/failure.
> Note that in its current state the function cannot tell if there
> was a conversion failure...
>
> Signed-off-by: Jason Gerecke <[email protected]>
> ---
> tools/xsetwacom.c | 47 +++++++++++++++++++++++++++++++++++++++--------
> 1 files changed, 39 insertions(+), 8 deletions(-)
>
> diff --git a/tools/xsetwacom.c b/tools/xsetwacom.c
> index 3435389..4497e72 100644
> --- a/tools/xsetwacom.c
> +++ b/tools/xsetwacom.c
> @@ -1425,18 +1425,29 @@ error:
> return;
> }
>
> -static int convert_value_from_user(param_t *param, char *value)
> -{
> - int val;
>
> +/**
> + * Performs intelligent string->int conversion. In addition to converting
> strings
> + * of digits into their corresponding integer values, it converts special
> string
> + * constants such as "off" (0) and "on" (1).
> + *
> + * The caller is expected to allocate and free memory for return_value.
> + *
> + * @param param the property paramaters
> + * @param value the string to be converted
> + * @param[out] return_value the integer representation of the 'value'
> parameter
> + * @return TRUE if the conversion succeeded, FALSE otherwise
> + */
> +static Bool convert_value_from_user(param_t *param, char *value, int
> *return_value)
> +{
> if ((param->prop_flags & PROP_FLAG_BOOLEAN) && strcmp(value, "off") ==
> 0)
> - val = 0;
> + *return_value = 0;
> else if ((param->prop_flags & PROP_FLAG_BOOLEAN) && strcmp(value,
> "on") == 0)
> - val = 1;
> + *return_value = 1;
> else
> - val = atoi(value);
> + *return_value = atoi(value);
>
> - return val;
> + return True;
> }
>
> static void set(Display *dpy, int argc, char **argv)
> @@ -1512,7 +1523,27 @@ static void set(Display *dpy, int argc, char **argv)
>
> for (i = 0; i < nvals; i++)
> {
> - val = convert_value_from_user(param, values[i]);
> + Bool success;
> + int val;
> + int *retval;
> +
> + retval = calloc(1, sizeof(int));
> + if (!retval)
> + {
> + fprintf(stderr, "calloc failed\n");
> + exit(EXIT_FAILURE);
> + }
Why the trouble of alloc'ing an int? Just pass in &retval.
Chris
> +
> + success = convert_value_from_user(param, values[i], retval);
> + val = *retval;
> + free(retval);
> +
> + if (!success)
> + {
> + fprintf(stderr, "'%s' is not a valid value for the
> '%s' property.\n",
> + values[i], param->name);
> + goto out;
> + }
>
> switch(param->prop_format)
> {
> --
> 1.7.1
>
>
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