ssize_t spk_var_show()

in speakup/kobjects.c [546:596]

• 49 lines of code
• 10 McCabe index (conditional complexity)

ssize_t spk_var_show(struct kobject *kobj, struct kobj_attribute *attr,
		     char *buf)
{
	int rv = 0;
	struct st_var_header *param;
	struct var_t *var;
	char *cp1;
	char *cp;
	char ch;
	unsigned long flags;

	param = spk_var_header_by_name(attr->attr.name);
	if (!param)
		return -EINVAL;

	spin_lock_irqsave(&speakup_info.spinlock, flags);
	var = (struct var_t *)param->data;
	switch (param->var_type) {
	case VAR_NUM:
	case VAR_TIME:
		if (var)
			rv = sprintf(buf, "%i\n", var->u.n.value);
		else
			rv = sprintf(buf, "0\n");
		break;
	case VAR_STRING:
		if (var) {
			cp1 = buf;
			*cp1++ = '"';
			for (cp = (char *)param->p_val; (ch = *cp); cp++) {
				if (ch >= ' ' && ch < '~')
					*cp1++ = ch;
				else
					cp1 += sprintf(cp1, "\\x%02x", ch);
			}
			*cp1++ = '"';
			*cp1++ = '\n';
			*cp1 = '\0';
			rv = cp1 - buf;
		} else {
			rv = sprintf(buf, "\"\"\n");
		}
		break;
	default:
		rv = sprintf(buf, "Bad parameter  %s, type %i\n",
			     param->name, param->var_type);
		break;
	}
	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
	return rv;
}