def TypeEntry(type_, params, rets):
p = varuint(len(params))
for param in params:
p += varuint(param)
r = varuint(len(rets))
for ret in rets:
r += varuint(ret)
return varuint(type_) + p + r
def ImportEntry(module, field, kind, *ext):
prefix = varuint(len(module)) + module + varuint(
len(field)) + field + varuint(kind)
payload = ''
if kind == KIND_FUNCTION:
payload = varuint(ext[0])
elif kind == KIND_MEMORY:
min_units = ext[0]
flags = 0
if len(ext) > 1:
flags = 1
max_units = ext[1]
payload = varuint(flags) + varuint(min_units) + varuint(max_units)
else:
payload = varuint(flags) + varuint(min_units)
return prefix + payload
def ElemEntry(idx, expr, indices):
elems = ''
for indice in indices:
elems += chr(indice)
return varuint(idx) + expr + varuint(len(indices)) + elems
def CodeEntry(locals_, body):
l = varuint(len(locals_.keys()))
for k in locals_.keys():
l += varuint(locals_[k])
l += varuint(k)
return varuint(len(l) + len(body) + 1) + l + body + '\x0b'
def GlobalEntry(type_, mutable, expr):
return varuint(type_) + varuint(mutable) + expr
def MemoryEntry(min_units, max_units=0):
flags = 0
if max_units != 0:
flags = 1
return varuint(flags) + varuint(min_units) + varuint(max_units)
return varuint(flags) + varuint(min_units)
def CONST_i64(value):
return varuint(0x42) + varuint(value) + '\x0b'
def CONST_i32(value):
return varuint(0x41) + varuint(value) + '\x0b'
def DataEntry(idx, expr, data):
return varuint(idx) + expr + varuint(len(data)) + data
def ArraySection(_id, args):
data = ''
for e in args:
data += e
return Section(_id, varuint(len(args)) + data)
def Section(_id, payload):
return varuint(_id) + varuint(len(payload)) + payload
def FunctionEntry(type_idx):
return varuint(type_idx)
def UserSection(name, payload):
section_data = varuint(len(name)) + name + payload
return varuint(SECTION_USER) + varuint(len(section_data)) + section_data
def TableEntry(type_, min_units, max_units = 0):
flags = 0
if max_units != 0:
flags = 1
return varuint(type_) + varuint(flags) + varuint(min_units) + varuint(max_units)
return varuint(type_) + varuint(flags) + varuint(min_units)
