/*
* Adds to a particular unit-system a mapping from an identifier to a unit.
*
* Arguments:
* systemMap Address of the pointer to the system-map.
* id Pointer to the identifier. May be freed upon return.
* unit Pointer to the unit. May be freed upon return.
* compare Pointer to comparison function for unit-identifiers.
* Returns:
* UT_BAD_ARG "id" is NULL or "unit" is NULL.
* UT_OS Operating-sytem failure. See "errno".
* UT_SUCCESS Success.
*/
static ut_status
mapIdToUnit(
SystemMap** const systemMap,
const char* const id,
const ut_unit* const unit,
int (*compare)(const void*, const void*))
{
ut_status status = UT_SUCCESS;
if (id == NULL) {
status = UT_BAD_ARG;
}
else if (unit == NULL) {
status = UT_BAD_ARG;
}
else {
ut_system* system = ut_get_system(unit);
if (*systemMap == NULL) {
*systemMap = smNew();
if (*systemMap == NULL)
status = UT_OS;
}
if (*systemMap != NULL) {
IdToUnitMap** const idToUnit =
(IdToUnitMap**)smSearch(*systemMap, system);
if (idToUnit == NULL) {
status = UT_OS;
}
else {
if (*idToUnit == NULL) {
*idToUnit = itumNew(compare);
if (*idToUnit == NULL)
status = UT_OS;
}
if (*idToUnit != NULL)
status = itumAdd(*idToUnit, id, unit);
} /* have system-map entry */
} /* have system-map */
} /* valid arguments */
return status;
}
/*
* Adds an entry to the unit-to-identifier map associated with a unit-system.
*
* Arguments:
* sytemMap Address of the pointer to the
* system-to-unit-to-identifier map.
* unit The unit. May be freed upon return.
* id The identifier. May be freed upon return.
* encoding The ostensible encoding of "id".
* Returns:
* UT_BAD_ARG "unit" or "id" is NULL, or "id" is inconsistent with
* "encoding".
* UT_OS Operating-system error. See "errno".
* UT_EXISTS "unit" already maps to a different identifier.
* UT_SUCCESS Success.
*/
static ut_status
mapUnitToId(
SystemMap** const systemMap,
const ut_unit* const unit,
const char* const id,
ut_encoding encoding)
{
ut_status status;
assert(systemMap != NULL);
if (unit == NULL || id == NULL) {
status = UT_BAD_ARG;
}
else {
if (*systemMap == NULL) {
*systemMap = smNew();
if (*systemMap == NULL)
status = UT_OS;
}
if (*systemMap != NULL) {
UnitToIdMap** const unitToIdMap =
(UnitToIdMap**)smSearch(*systemMap, ut_get_system(unit));
if (unitToIdMap == NULL) {
status = UT_OS;
}
else {
if (*unitToIdMap == NULL) {
*unitToIdMap = utimNew();
if (*unitToIdMap == NULL)
status = UT_OS;
}
if (*unitToIdMap != NULL)
status = utimAdd(*unitToIdMap, unit, id, encoding);
}
}
}
return status;
}