void
acpi_ns_get_internal_name_length (
struct acpi_namestring_info *info)
{
char *next_external_char;
u32 i;
ACPI_FUNCTION_ENTRY ();
next_external_char = info->external_name;
info->num_carats = 0;
info->num_segments = 0;
info->fully_qualified = FALSE;
/*
* For the internal name, the required length is 4 bytes
* per segment, plus 1 each for root_prefix, multi_name_prefix_op,
* segment count, trailing null (which is not really needed,
* but no there's harm in putting it there)
*
* strlen() + 1 covers the first name_seg, which has no
* path separator
*/
if (acpi_ns_valid_root_prefix (next_external_char[0])) {
info->fully_qualified = TRUE;
next_external_char++;
}
else {
/*
* Handle Carat prefixes
*/
while (*next_external_char == '^') {
info->num_carats++;
next_external_char++;
}
}
/*
* Determine the number of ACPI name "segments" by counting
* the number of path separators within the string. Start
* with one segment since the segment count is (# separators)
* + 1, and zero separators is ok.
*/
if (*next_external_char) {
info->num_segments = 1;
for (i = 0; next_external_char[i]; i++) {
if (acpi_ns_valid_path_separator (next_external_char[i])) {
info->num_segments++;
}
}
}
info->length = (ACPI_NAME_SIZE * info->num_segments) +
4 + info->num_carats;
info->next_external_char = next_external_char;
}
acpi_status
acpi_ns_build_internal_name (
acpi_namestring_info *info)
{
u32 num_segments = info->num_segments;
NATIVE_CHAR *internal_name = info->internal_name;
NATIVE_CHAR *external_name = info->next_external_char;
NATIVE_CHAR *result = NULL;
u32 i;
FUNCTION_TRACE ("Ns_build_internal_name");
/* Setup the correct prefixes, counts, and pointers */
if (info->fully_qualified) {
internal_name[0] = '\\';
if (num_segments <= 1) {
result = &internal_name[1];
}
else if (num_segments == 2) {
internal_name[1] = AML_DUAL_NAME_PREFIX;
result = &internal_name[2];
}
else {
internal_name[1] = AML_MULTI_NAME_PREFIX_OP;
internal_name[2] = (char) num_segments;
result = &internal_name[3];
}
}
else {
/*
* Not fully qualified.
* Handle Carats first, then append the name segments
*/
i = 0;
if (info->num_carats) {
for (i = 0; i < info->num_carats; i++) {
internal_name[i] = '^';
}
}
if (num_segments == 1) {
result = &internal_name[i];
}
else if (num_segments == 2) {
internal_name[i] = AML_DUAL_NAME_PREFIX;
result = &internal_name[i+1];
}
else {
internal_name[i] = AML_MULTI_NAME_PREFIX_OP;
internal_name[i+1] = (char) num_segments;
result = &internal_name[i+2];
}
}
/* Build the name (minus path separators) */
for (; num_segments; num_segments--) {
for (i = 0; i < ACPI_NAME_SIZE; i++) {
if (acpi_ns_valid_path_separator (*external_name) ||
(*external_name == 0)) {
/* Pad the segment with underscore(s) if segment is short */
result[i] = '_';
}
else {
/* Convert the character to uppercase and save it */
result[i] = (char) TOUPPER (*external_name);
external_name++;
}
}
/* Now we must have a path separator, or the pathname is bad */
if (!acpi_ns_valid_path_separator (*external_name) &&
(*external_name != 0)) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Move on the next segment */
external_name++;
result += ACPI_NAME_SIZE;
}
/* Terminate the string */
*result = 0;
if (info->fully_qualified) {
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "returning [%p] (abs) \"\\%s\"\n",
internal_name, &internal_name[0]));
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "returning [%p] (rel) \"%s\"\n",
internal_name, &internal_name[2]));
}
return_ACPI_STATUS (AE_OK);
}
