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33 lines
1.2 KiB
Python
33 lines
1.2 KiB
Python
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import gdb
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import re
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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>.+)')
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class JsonValuePrinter:
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"Print a json-value"
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def __init__(self, val):
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self.val = val
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def to_string(self):
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if self.val.type.strip_typedefs().code == gdb.TYPE_CODE_FLT:
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return ("%.6f" % float(self.val)).rstrip("0")
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return self.val
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def json_lookup_function(val):
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if m := ns_pattern.fullmatch(str(val.type.strip_typedefs().name)):
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name = m.group('name')
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if name and name.startswith('basic_json<') and name.endswith('>'):
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m = ns_pattern.fullmatch(str(val['m_type']))
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t = m.group('name')
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if t and t.startswith('detail::value_t::'):
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try:
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union_val = val['m_value'][t.removeprefix('detail::value_t::')]
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if union_val.type.code == gdb.TYPE_CODE_PTR:
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return gdb.default_visualizer(union_val.dereference())
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else:
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return JsonValuePrinter(union_val)
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except Exception:
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return JsonValuePrinter(val['m_type'])
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gdb.pretty_printers.append(json_lookup_function)
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