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Petru Conduraru
d5076bded3
Setting an IfcInteger/IfcTimeStamp typed attribute (e.g. IfcOwnerHistory.CreationDate) outside the signed 32-bit range corrupted the value instead of raising, since the Python wrapper's set_attribute_value_py() truncated it with a plain static_cast<int> before handing it to the C++ storage. Unix timestamps before 1901-12-13 or after 2038-01-19 silently wrapped around (e.g. 3000000000 became -1294967296) rather than being rejected or stored correctly. Fixes #3058, equivalent to PR #8683 but ported to this branch's rewritten ifcparse (snake_case files, variant_array/instance_data storage, SWIG PyObject-based attribute setter) instead of the old IfcEntityInstanceData sources, which no longer exist here. The scalar slot of the attribute variant (Argument_INT) becomes int64_t. Integer aggregates (Argument_AGGREGATE_OF_INT, e.g. CoordIndex) and instance/reference identifiers stay 32-bit, since neither is the value that overflows here; this narrow scope is kept on its own technical merits (aggregates and identifiers were never the source of the bug, and widening them would be a much larger, riskier change for no benefit) even though aothms said compatibility isn't a concern on this v0.9-track branch. express::Base::set_attribute_value promotes the schema-generated int to int64_t at a single choke point, so the generated setters keep compiling unchanged. The STEP lexer, writer, and SWIG wrapper (set_attribute_value_py, pythonize) are all widened together, since widening only the Python-facing setter would have silently wrapped the value on file write instead of raising. Verified in a build (IFC2X3 and IFC4, BUILD_IFCGEOM off, no kernels): pre-1901, post-2038, both 32-bit boundaries, and a 9e12 value all round trip exactly both in memory and through STEP text serialization (write then reopen). A value outside the 64-bit range now raises a clean exception instead of corrupting data. Ordinary in-range integers and integer aggregates (e.g. IfcTriangulatedFaceSet.CoordIndex) are unaffected. The existing util/test_attribute.py and test_file.py suites pass unchanged; test_entity_instance.py has 5 pre-existing failures unrelated to this change (confirmed identical on an unfixed build of this branch, caused by a missing get_info_2 binding and _patch_swig_comparisons never being implemented here). Generated with the assistance of an AI coding tool.
IfcOpenShell
IfcOpenShell is an open source (LGPL) software library for working with Industry Foundation Classes (IFC). Complete parsing support is provided for IFC2x3 TC1, IFC4 Add2 TC1, IFC4x1, IFC4x2, and IFC4x3 Add2. Extensive geometric support is implemented for the IFC releases IFC2x3 TC1 and IFC4 Add2 TC1. Extending with support for arbitrary IFC schemas is possible at compile-time when using C++ and at run-time when using Python.
In addition to a C++ and Python API, IfcOpenShell comes with an ecosystem of tools, notably including IfcConvert (an application to convert IFC models to other formats), Bonsai (an add-on to Blender providing a graphical IFC authoring platform), and many other libraries, CLI apps, and more. Support is also provided for auxiliary standards such as BCF and IDS.
For more information, see:
Development is sponsored through your generous donations!
Contents
| Name | Description | License | Service |
|---|---|---|---|
| bcf | Library to read and write BCF-XML and query OpenCDE BCF-API modules | LGPL-3.0-or-later |   |
| bonsai | Add-on to Blender providing a graphical native IFC authoring platform | GPL-3.0-or-later |    |
| bsdd | Library to query the bSDD API | LGPL-3.0-or-later |  |
| ifc2ca | Utility to convert IFC structural analysis models to Code_Aster | LGPL-3.0-or-later | |
| ifc4d | Convert to and from IFC and project management software | LGPL-3.0-or-later |  |
| ifc5d | Report and optimise cost information from IFC | LGPL-3.0-or-later |  |
| ifcbimtester | Wrapper for Gherkin based unit testing for IFC models | LGPL-3.0-or-later | |
| ifcblender | Historic Blender IFC import add-on | LGPL-3.0-or-later* | |
| ifccityjson | Convert CityJSON to IFC | LGPL-3.0-or-later |  |
| ifcclash | Clash detection library and CLI app | LGPL-3.0-or-later |  |
| ifcconvert | CLI app to convert IFC to many other formats | LGPL-3.0-or-later* |   |
| ifccsv | Library and CLI app to export and import schedules from IFC | LGPL-3.0-or-later |  |
| ifcdiff | Compare changes between IFC models | LGPL-3.0-or-later |  |
| ifcedit | CLI wrapper for ifcopenshell.api IFC model mutation functions | LGPL-3.0-or-later |  |
| ifcfm | Extract IFC data for FM handover requirements | LGPL-3.0-or-later |  |
| ifcmax | Historic extension for IFC support in 3DS Max | LGPL-3.0-or-later* | |
| ifcmcp | MCP server for querying and editing IFC building models | LGPL-3.0-or-later |  |
| ifcopenshell-python | Python library for IFC manipulation | LGPL-3.0-or-later* |         |
| ifcpatch | Utility to run pre-packaged scripts to manipulate IFCs | LGPL-3.0-or-later |  |
| ifcquery | CLI tool for querying and inspecting IFC building models | LGPL-3.0-or-later |  |
| ifcsverchok | Blender Add-on for visual node programming with IFC | GPL-3.0-or-later |  |
| ifctester | Library, CLI and webapp for IDS model auditing | LGPL-3.0-or-later |  |
The IfcOpenShell C++ codebase is split into multiple interal libraries:
| Name | Description | License |
|---|---|---|
| ifcgeom | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcgeom_schema_agnostic | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcgeomserver | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcjni | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcparse | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| ifcwrap | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| qtviewer | Internal library for IfcOpenShell | LGPL-3.0-or-later* |
| serializers | Internal library for IfcOpenShell | LGPL-3.0-or-later* |