irrlicht/source/lib/json/tools/gdb_pretty_printer/nlohmann-json.py

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2023-11-26 07:31:01 +01:00
import gdb
import re
ns_pattern = re.compile(r'nlohmann(::json_abi(?P<tags>\w*)(_v(?P<v_major>\d+)_(?P<v_minor>\d+)_(?P<v_patch>\d+))?)?::(?P<name>.+)')
class JsonValuePrinter:
"Print a json-value"
def __init__(self, val):
self.val = val
def to_string(self):
if self.val.type.strip_typedefs().code == gdb.TYPE_CODE_FLT:
return ("%.6f" % float(self.val)).rstrip("0")
return self.val
def json_lookup_function(val):
if m := ns_pattern.fullmatch(str(val.type.strip_typedefs().name)):
name = m.group('name')
if name and name.startswith('basic_json<') and name.endswith('>'):
m = ns_pattern.fullmatch(str(val['m_type']))
t = m.group('name')
if t and t.startswith('detail::value_t::'):
try:
union_val = val['m_value'][t.removeprefix('detail::value_t::')]
if union_val.type.code == gdb.TYPE_CODE_PTR:
return gdb.default_visualizer(union_val.dereference())
else:
return JsonValuePrinter(union_val)
except Exception:
return JsonValuePrinter(val['m_type'])
gdb.pretty_printers.append(json_lookup_function)