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fxconv: allow adding symbols and ObjectData to ObjectData

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Lephenixnoir 2021-06-10 00:04:55 +02:00
parent fcc6f33f9b
commit a17eaabbd8
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GPG key ID: 1BBA026E13FC0495
1 changed files with 22 additions and 1 deletions
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23
fxconv/fxconv.py
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@ -14,7 +14,7 @@ __all__ = [
# Color names
"FX_BLACK", "FX_DARK", "FX_LIGHT", "FX_WHITE", "FX_ALPHA",
# Conversion mechanisms
"ObjectData", "u8", "u16", "u32", "ref",
"ObjectData", "u8", "u16", "u32", "ref", "sym",
# Functions
"quantize", "convert", "elf",
# Reusable classes
@ -153,6 +153,7 @@ def u16(x):
return bytes([ (x >> 8) & 255, x & 255 ])
def u32(x):
return bytes([ (x >> 24) & 255, (x >> 16) & 255, (x >> 8) & 255, x & 255 ])
def ref(base, offset=None, padding=None):
if isinstance(base, bytearray):
base = bytes(base)
@ -168,7 +169,11 @@ def ref(base, offset=None, padding=None):
raise FxconvError(f"invalid type {type(base)} for ref()")
def sym(name):
return Sym("_" + name)
Ref = collections.namedtuple("Ref", ["data", "name", "offset"])
Sym = collections.namedtuple("Sym", ["name"])
class ObjectData:
"""
@ -191,6 +196,19 @@ class ObjectData:
elif isinstance(other, Ref) and other.data:
self.elements.append(("", len(self.static_data)))
self.static_data += other.data
elif isinstance(other, ObjectData):
# Shift all offsets into other.static_data by len(self.static_data)
el = other.elements
for i in range(len(el)):
if not isinstance(el[i], bytes):
name, offset = el
if not name:
el[i] = (name, offset + len(self.static_data))
# Extend elements and data
self.elements += el
self.static_data += static_data
elif isinstance(other, Sym):
self.elements.append(other)
return self
def data(self):
@ -201,6 +219,9 @@ class ObjectData:
for el in self.elements:
if isinstance(el, bytes):
assembly += ".byte " + ",".join(hex(x) for x in el) + "\n"
elif isinstance(el, Sym):
assembly += f".global {el.name}\n"
assembly += f"{el.name}:\n"
else:
name, offset = el
name = "_" + name if name != "" else data_symbol