void speakup_register_var(struct var_t *var)
{
static char nothing[2] = "\0";
int i;
struct st_var_header *p_header;
BUG_ON(!var || var->var_id < 0 || var->var_id >= MAXVARS);
if (var_ptrs[0] == NULL) {
for (i = 0; i < MAXVARS; i++) {
p_header = &var_headers[i];
var_ptrs[p_header->var_id] = p_header;
p_header->data = NULL;
}
}
p_header = var_ptrs[var->var_id];
if (p_header->data != NULL)
return;
p_header->data = var;
switch (p_header->var_type) {
case VAR_STRING:
set_string_var(nothing, p_header, 0);
break;
case VAR_NUM:
case VAR_TIME:
set_num_var(0, p_header, E_DEFAULT);
break;
default:
break;
}
return;
}
/*
* This function is called when a user echos a value to one of the
* variable parameters.
*/
ssize_t spk_var_store(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct st_var_header *param;
int ret;
int len;
char *cp;
struct var_t *var_data;
int value;
unsigned long flags;
param = var_header_by_name(attr->attr.name);
if (param == NULL)
return -EINVAL;
if (param->data == NULL)
return 0;
ret = 0;
cp = xlate((char *) buf);
spk_lock(flags);
switch (param->var_type) {
case VAR_NUM:
case VAR_TIME:
if (*cp == 'd' || *cp == 'r' || *cp == '\0')
len = E_DEFAULT;
else if (*cp == '+' || *cp == '-')
len = E_INC;
else
len = E_SET;
speakup_s2i(cp, &value);
ret = set_num_var(value, param, len);
if (ret == E_RANGE) {
var_data = param->data;
pr_warn("value for %s out of range, expect %d to %d\n",
attr->attr.name,
var_data->u.n.low, var_data->u.n.high);
}
break;
case VAR_STRING:
len = strlen(buf);
if ((len >= 1) && (buf[len - 1] == '\n'))
--len;
if ((len >= 2) && (buf[0] == '"') && (buf[len - 1] == '"')) {
++buf;
len -= 2;
}
cp = (char *) buf;
cp[len] = '\0';
ret = set_string_var(buf, param, len);
if (ret == E_TOOLONG)
pr_warn("value too long for %s\n",
attr->attr.name);
break;
default:
pr_warn("%s unknown type %d\n",
param->name, (int)param->var_type);
break;
}
/*
* If voice was just changed, we might need to reset our default
* pitch and volume.
*/
if (strcmp(attr->attr.name, "voice") == 0) {
if (synth && synth->default_pitch) {
param = var_header_by_name("pitch");
if (param) {
set_num_var(synth->default_pitch[value], param,
E_NEW_DEFAULT);
set_num_var(0, param, E_DEFAULT);
}
}
if (synth && synth->default_vol) {
param = var_header_by_name("vol");
if (param) {
set_num_var(synth->default_vol[value], param,
E_NEW_DEFAULT);
set_num_var(0, param, E_DEFAULT);
}
}
}
spk_unlock(flags);
if (ret == SET_DEFAULT)
pr_info("%s reset to default value\n", attr->attr.name);
return count;
}