acpi_status
acpi_ps_get_next_arg(struct acpi_walk_state *walk_state,
struct acpi_parse_state *parser_state,
u32 arg_type, union acpi_parse_object **return_arg)
{
union acpi_parse_object *arg = NULL;
union acpi_parse_object *prev = NULL;
union acpi_parse_object *field;
u32 subop;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE_PTR("ps_get_next_arg", parser_state);
switch (arg_type) {
case ARGP_BYTEDATA:
case ARGP_WORDDATA:
case ARGP_DWORDDATA:
case ARGP_CHARLIST:
case ARGP_NAME:
case ARGP_NAMESTRING:
/* Constants, strings, and namestrings are all the same size */
arg = acpi_ps_alloc_op(AML_BYTE_OP);
if (!arg) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
acpi_ps_get_next_simple_arg(parser_state, arg_type, arg);
break;
case ARGP_PKGLENGTH:
/* Package length, nothing returned */
parser_state->pkg_end =
acpi_ps_get_next_package_end(parser_state);
break;
case ARGP_FIELDLIST:
if (parser_state->aml < parser_state->pkg_end) {
/* Non-empty list */
while (parser_state->aml < parser_state->pkg_end) {
field = acpi_ps_get_next_field(parser_state);
if (!field) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
if (prev) {
prev->common.next = field;
} else {
arg = field;
}
prev = field;
}
/* Skip to End of byte data */
parser_state->aml = parser_state->pkg_end;
}
break;
case ARGP_BYTELIST:
if (parser_state->aml < parser_state->pkg_end) {
/* Non-empty list */
arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP);
if (!arg) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Fill in bytelist data */
arg->common.value.size = (u32)
ACPI_PTR_DIFF(parser_state->pkg_end,
parser_state->aml);
arg->named.data = parser_state->aml;
/* Skip to End of byte data */
parser_state->aml = parser_state->pkg_end;
}
break;
case ARGP_TARGET:
case ARGP_SUPERNAME:
case ARGP_SIMPLENAME:
subop = acpi_ps_peek_opcode(parser_state);
if (subop == 0 ||
acpi_ps_is_leading_char(subop) ||
acpi_ps_is_prefix_char(subop)) {
/* null_name or name_string */
arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP);
if (!arg) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
status =
acpi_ps_get_next_namepath(walk_state, parser_state,
arg, 0);
} else {
/* Single complex argument, nothing returned */
walk_state->arg_count = 1;
}
break;
case ARGP_DATAOBJ:
case ARGP_TERMARG:
/* Single complex argument, nothing returned */
walk_state->arg_count = 1;
break;
case ARGP_DATAOBJLIST:
case ARGP_TERMLIST:
case ARGP_OBJLIST:
if (parser_state->aml < parser_state->pkg_end) {
/* Non-empty list of variable arguments, nothing returned */
walk_state->arg_count = ACPI_VAR_ARGS;
}
break;
default:
ACPI_REPORT_ERROR(("Invalid arg_type: %X\n", arg_type));
status = AE_AML_OPERAND_TYPE;
break;
}
*return_arg = arg;
return_ACPI_STATUS(status);
}
ACPI_PARSE_OBJECT *
acpi_ps_get_next_arg (
ACPI_PARSE_STATE *parser_state,
u32 arg_type,
u32 *arg_count)
{
ACPI_PARSE_OBJECT *arg = NULL;
ACPI_PARSE_OBJECT *prev = NULL;
ACPI_PARSE_OBJECT *field;
u32 subop;
switch (arg_type)
{
case ARGP_BYTEDATA:
case ARGP_WORDDATA:
case ARGP_DWORDDATA:
case ARGP_CHARLIST:
case ARGP_NAME:
case ARGP_NAMESTRING:
/* constants, strings, and namestrings are all the same size */
arg = acpi_ps_alloc_op (AML_BYTE_OP);
if (arg) {
acpi_ps_get_next_simple_arg (parser_state, arg_type, arg);
}
break;
case ARGP_PKGLENGTH:
/* package length, nothing returned */
parser_state->pkg_end = acpi_ps_get_next_package_end (parser_state);
break;
case ARGP_FIELDLIST:
if (parser_state->aml < parser_state->pkg_end) {
/* non-empty list */
while (parser_state->aml < parser_state->pkg_end) {
field = acpi_ps_get_next_field (parser_state);
if (!field) {
break;
}
if (prev) {
prev->next = field;
}
else {
arg = field;
}
prev = field;
}
/* skip to End of byte data */
parser_state->aml = parser_state->pkg_end;
}
break;
case ARGP_BYTELIST:
if (parser_state->aml < parser_state->pkg_end) {
/* non-empty list */
arg = acpi_ps_alloc_op (AML_BYTELIST_OP);
if (arg) {
/* fill in bytelist data */
arg->value.size = (parser_state->pkg_end - parser_state->aml);
((ACPI_PARSE2_OBJECT *) arg)->data = parser_state->aml;
}
/* skip to End of byte data */
parser_state->aml = parser_state->pkg_end;
}
break;
case ARGP_TARGET:
case ARGP_SUPERNAME:
{
subop = acpi_ps_peek_opcode (parser_state);
if (subop == 0 ||
acpi_ps_is_leading_char (subop) ||
acpi_ps_is_prefix_char (subop))
{
/* Null_name or Name_string */
arg = acpi_ps_alloc_op (AML_NAMEPATH_OP);
if (arg) {
acpi_ps_get_next_namepath (parser_state, arg, arg_count, 0);
}
}
else {
/* single complex argument, nothing returned */
*arg_count = 1;
}
}
break;
case ARGP_DATAOBJ:
case ARGP_TERMARG:
/* single complex argument, nothing returned */
*arg_count = 1;
break;
case ARGP_DATAOBJLIST:
case ARGP_TERMLIST:
case ARGP_OBJLIST:
if (parser_state->aml < parser_state->pkg_end) {
/* non-empty list of variable arguments, nothing returned */
*arg_count = ACPI_VAR_ARGS;
}
break;
}
return (arg);
}