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import awkward.forth
import awkward as ak
import numpy as np
form = ak.forms.Form.fromjson("""
{
"class": "ListOffsetArray64",
"offsets": "i64",
"content": {
"class": "RecordArray",
"contents": {
"x": {
"class": "NumpyArray",
"primitive": "float64",
"form_key": "node2"
},
"y": {
"class": "ListOffsetArray64",
"offsets": "i64",
"content": {
"class": "NumpyArray",
"primitive": "int64",
"form_key": "node4"
},
"form_key": "node3"
}
},
"form_key": "node1"
},
"form_key": "node0"
}
""")
class TypedArrayBuilder:
def __init__(self, form):
# pretend we used 'form' to determine how to create 'vm' and 'fsm'
self.form = form
self.vm = awkward.forth.ForthMachine32("""
input data
output part0-node0-offsets int64
output part0-node2-data float64
output part0-node3-offsets int64
output part0-node4-data int64
: node4-int64
{int64} = if
0 data seek
data q-> part0-node4-data
else
halt
then
;
: node3-list
{begin_list} <> if
halt
then
0
begin
pause ( always pause before each list item )
dup {end_list} = if
drop
part0-node3-offsets +<- stack
exit
else
node4-int64
1+
then
again
;
: node2-float64
{float64} = if
0 data seek
data d-> part0-node2-data
else
halt
then
;
: node1-record
node2-float64 pause ( pause after each field item except the last )
node3-list
;
: node0-list
{begin_list} <> if
halt
then
0
begin
pause ( always pause before each list item )
dup {end_list} = if
drop
part0-node0-offsets +<- stack
exit
else
node1-record
1+
then
again
;
0 part0-node0-offsets <- stack
0 part0-node3-offsets <- stack
0
begin
pause ( always pause before each outermost array item )
node0-list
1+
again
""".format(int64=0, float64=1, begin_list=2, end_list=3))
self.data = np.empty(8, np.uint8)
self.vm.run({"data": self.data})
def int64(self, x):
self.data.view(np.int64)[0] = x
self.vm.stack_push(0)
self.vm.resume()
def float64(self, x):
self.data.view(np.float64)[0] = x
self.vm.stack_push(1)
self.vm.resume()
def begin_list(self):
self.vm.stack_push(2)
self.vm.resume()
def end_list(self):
self.vm.stack_push(3)
self.vm.resume()
def snapshot(self):
return ak.from_buffers(self.form, self.vm.stack[0], self.vm.outputs)
def debug_step(self):
print("stack: ", builder.vm.stack)
for k, v in builder.vm.outputs.items():
print(k + ":", np.asarray(v))
print("array:", self.snapshot())
print()
# example = ak.Array([
# [{"x": 1.1, "y": [1]}, {"x": 2.2, "y": [1, 2]}],
# [],
# [{"x": 3.3, "y": [1, 2, 3]}],
# ])
builder = TypedArrayBuilder(form)
builder.debug_step()
builder.begin_list()
builder.debug_step()
builder.float64(1.1)
builder.debug_step()
builder.begin_list()
builder.debug_step()
builder.int64(1)
builder.debug_step()
builder.end_list()
builder.debug_step()
builder.float64(2.2)
builder.debug_step()
builder.begin_list()
builder.debug_step()
builder.int64(1)
builder.debug_step()
builder.int64(2)
builder.debug_step()
builder.end_list()
builder.debug_step()
builder.end_list()
builder.debug_step()
builder.begin_list()
builder.debug_step()
builder.end_list()
builder.debug_step()
builder.begin_list()
builder.debug_step()
builder.float64(3.3)
builder.debug_step()
builder.begin_list()
builder.debug_step()
builder.int64(1)
builder.debug_step()
builder.int64(2)
builder.debug_step()
builder.int64(3)
builder.debug_step()
builder.end_list()
builder.debug_step()
builder.end_list()
builder.debug_step()
assert builder.snapshot().tolist() == [
[{"x": 1.1, "y": [1]}, {"x": 2.2, "y": [1, 2]}],
[],
[{"x": 3.3, "y": [1, 2, 3]}],
]
|
