u8
acpi_ut_safe_strncat(char *dest,
acpi_size dest_size,
char *source, acpi_size max_transfer_length)
{
acpi_size actual_transfer_length;
actual_transfer_length =
ACPI_MIN(max_transfer_length, ACPI_STRLEN(source));
if ((ACPI_STRLEN(dest) + actual_transfer_length) >= dest_size) {
return (TRUE);
}
ACPI_STRNCAT(dest, source, max_transfer_length);
return (FALSE);
}
BOOLEAN
AcpiUtSafeStrncat (
char *Dest,
ACPI_SIZE DestSize,
char *Source,
ACPI_SIZE MaxTransferLength)
{
ACPI_SIZE ActualTransferLength;
ActualTransferLength = ACPI_MIN (MaxTransferLength, ACPI_STRLEN (Source));
if ((ACPI_STRLEN (Dest) + ActualTransferLength) >= DestSize)
{
return (TRUE);
}
ACPI_STRNCAT (Dest, Source, MaxTransferLength);
return (FALSE);
}
static char *
AcpiGetTagPathname (
ACPI_NAMESPACE_NODE *BufferNode,
ACPI_NAMESPACE_NODE *ResourceNode,
UINT32 BitIndex)
{
ACPI_STATUS Status;
UINT32 ResourceBitIndex;
UINT8 ResourceTableIndex;
ACPI_SIZE RequiredSize;
char *Pathname;
AML_RESOURCE *Aml;
ACPI_PARSE_OBJECT *Op;
char *InternalPath;
char *Tag;
/* Get the Op that contains the actual buffer data */
Op = BufferNode->Op->Common.Value.Arg;
Op = Op->Common.Next;
if (!Op)
{
return (NULL);
}
/* Get the individual resource descriptor and validate it */
Aml = ACPI_CAST_PTR (AML_RESOURCE,
&Op->Named.Data[ResourceNode->Value]);
Status = AcpiUtValidateResource (Aml, &ResourceTableIndex);
if (ACPI_FAILURE (Status))
{
return (NULL);
}
/* Get offset into this descriptor (from offset into entire buffer) */
ResourceBitIndex = BitIndex - ACPI_MUL_8 (ResourceNode->Value);
/* Get the tag associated with this resource descriptor and offset */
Tag = AcpiDmGetResourceTag (ResourceBitIndex, Aml, ResourceTableIndex);
if (!Tag)
{
return (NULL);
}
/*
* Now that we know that we have a reference that can be converted to a
* symbol, change the name of the resource to a unique name.
*/
AcpiDmUpdateResourceName (ResourceNode);
/* Get the full pathname to the parent buffer */
RequiredSize = AcpiNsGetPathnameLength (BufferNode);
if (!RequiredSize)
{
return (NULL);
}
Pathname = ACPI_ALLOCATE_ZEROED (RequiredSize + ACPI_PATH_SEGMENT_LENGTH);
if (!Pathname)
{
return (NULL);
}
Status = AcpiNsBuildExternalPath (BufferNode, RequiredSize, Pathname);
if (ACPI_FAILURE (Status))
{
return (NULL);
}
/*
* Create the full path to the resource and tag by: remove the buffer name,
* append the resource descriptor name, append a dot, append the tag name.
*
* TBD: Always using the full path is a bit brute force, the path can be
* often be optimized with carats (if the original buffer namepath is a
* single nameseg). This doesn't really matter, because these paths do not
* end up in the final compiled AML, it's just an appearance issue for the
* disassembled code.
*/
Pathname[ACPI_STRLEN (Pathname) - ACPI_NAME_SIZE] = 0;
ACPI_STRNCAT (Pathname, ResourceNode->Name.Ascii, ACPI_NAME_SIZE);
ACPI_STRCAT (Pathname, ".");
ACPI_STRNCAT (Pathname, Tag, ACPI_NAME_SIZE);
/* Internalize the namepath to AML format */
AcpiNsInternalizeName (Pathname, &InternalPath);
ACPI_FREE (Pathname);
return (InternalPath);
}
