cnc_wams/wasm-port/docs/source-reuse-map.md

# Source Reuse Map

## Purpose

This map records which LinuxCNC source files are currently vendored into the
standalone WASM port, why they are present, which standalone boundary they
touch, and how the port verifies that they still come directly from upstream
LinuxCNC.

The authoritative extraction list is `tools/source-manifest.txt`. The upstream
baseline is recorded in `tools/upstream-baseline.txt` and
`docs/scope-and-baseline.md`.

## Validation Contract

Current validation is intentionally mechanical:

- `tools/verify_upstream_baseline.sh` checks that `../linuxcnc` is at the
  recorded upstream commit.
- `tools/verify_vendor_sync.sh` checks that every manifest file exists in
  `vendor/linuxcnc/`, that no extra vendored file exists, and that each
  vendored file is byte-identical to the matching upstream file.
- `tools/build_native_probes.sh` builds source-level native compile probes for
  every `.c` and `.cc` file in the manifest.
- `tests/native/verify_native_probes.sh` checks that every manifest `.c` and
  `.cc` file has a matching source probe in `build/native/source-probes.tsv`.
- `tools/verify_no_standalone_cnc_semantics.sh` rejects standalone
  `Interp::convert_g()` definitions outside `vendor/linuxcnc/`.

## Reuse Matrix

| Capability | LinuxCNC source files | Port classification | Standalone boundary | Current validation |
| --- | --- | --- | --- | --- |
| INI parsing | `src/emc/ini/inifile.cc`, `inifile.h`, `inifile.hh` | Copy unchanged | Native file IO remains LinuxCNC-style in the vendored parser; browser OPFS integration remains outside this layer; `runtime/sdk/src/linuxcnc-ini.js` only wraps the exported WASM C ABI | Vendor byte sync, `linuxcnc_ini_probe`, `linuxcnc_inifile_source_probe`, `tests/wasm/node/verify_ini_wasm.sh`, `tests/browser/verify_ini_panel_browser.sh` |
| RTAPI compatibility headers | `src/rtapi/rtapi_*.h` in the manifest | Copy unchanged plus standalone shim include path | `runtime/core/shims/rtapi.h` supplies the minimal standalone RTAPI surface needed by vendored code | Vendor byte sync, compile coverage through dependent source probes |
| Canon/NML-facing interpreter types | `src/emc/nml_intf/canon*.hh`, `emctool.h`, `interp_return.hh`, `motion_types.h`, `emcpose.*`, `emcpos.h`, `debugflags.h`, `src/emc/linuxcnc.h` | Copy unchanged plus narrow standalone status shim | NML transport is not ported; `runtime/core/shims/nml_intf/emc.hh` exposes only the `emcStatus` machine-units status edge currently needed by vendored interpreter conversion and initialization code | Vendor byte sync, dependent source probes, `linuxcnc_emc_status_probe`, `linuxcnc_tp_api_probe`, interpreter harnesses |
| Motion state headers | `src/emc/motion/state_tag.h`, `emcmotcfg.h`, `simple_tp.h`, `motion.h`, `mot_priv.h`, `axis.h` | Copy unchanged | Realtime motion process is not ported; standalone probes seed the small motion status/config state required by TP calls | Vendor byte sync, `linuxcnc_tp_api_probe` |
| Identity/trivial kinematics | `src/emc/kinematics/kinematics.h`, `cubic.h`, `kins_util.c`, `trivkins.c` | Copy unchanged | HAL component lifecycle and RTAPI module metadata are replaced by standalone shims; forward/inverse mapping behavior remains LinuxCNC source | Vendor byte sync, per-file source probes, `linuxcnc_kinematics_probe` |
| Switchable 5-axis bridge kinematics | `src/emc/kinematics/5axiskins.c`, `switchkins.c`, `switchkins.h`, `userkfuncs.c`, plus `src/rtapi/rtapi_ctype.h` | Copy unchanged | HAL pin allocation, HAL component lifecycle, and RTAPI module metadata are standalone runtime edges; switchable 5-axis forward/inverse behavior remains LinuxCNC source | Vendor byte sync, per-file source probes, `linuxcnc_5axis_kinematics_probe` |
| TRT table-rotary kinematics | `src/emc/kinematics/trtfuncs.c`, `xyzac-trt-kins.c`, `xyzbc-trt-kins.c` | Copy unchanged | HAL pin allocation and switchkins lifecycle stay runtime boundaries; XYZAC/XYZBC TRT forward/inverse behavior remains LinuxCNC source | Vendor byte sync, per-file source probes, `linuxcnc_xyzac_trt_kinematics_probe`, `linuxcnc_xyzbc_trt_kinematics_probe` |
| Additional non-switchable kinematics | `src/emc/kinematics/corexykins.c`, `rotatekins.c`, `rosekins.c`, `maxkins.c`, `lineardeltakins.c`, `lineardeltakins-common.h`, `rotarydeltakins.c`, `rotarydeltakins-common.h`, `scorbot-kins.c`, `tripodkins.c`, `scarakins.c`, `pumakins.c`, `pumakins.h`, `genhexkins.c`, `genhexkins.h`, `genserfuncs.c`, `genserkins.c`, `genserkins.h`, `ugenserkins.c`, `pentakins.c`, `pentakins.h`, `cubic.c` | Copy unchanged | HAL pin allocation, HAL parameter allocation, HAL component lifecycle, RTAPI module metadata, Go math C/C++ linkage, switchkins iterative-forward warmup, and userspace test-program process entry remain standalone runtime edges; forward/inverse behavior remains LinuxCNC source where the module exposes it | Vendor byte sync, per-file source probes, `linuxcnc_corexy_kinematics_probe`, `linuxcnc_rotate_kinematics_probe`, `linuxcnc_rose_kinematics_probe`, `linuxcnc_max_kinematics_probe`, `linuxcnc_lineardelta_kinematics_probe`, `linuxcnc_rotarydelta_kinematics_probe`, `linuxcnc_scorbot_kinematics_probe`, `linuxcnc_tripod_kinematics_probe`, `linuxcnc_scara_kinematics_probe`, `linuxcnc_puma_kinematics_probe`, `linuxcnc_genser_kinematics_probe`, `linuxcnc_genhex_kinematics_probe`, `linuxcnc_pentakins_kinematics_probe` |
| Trajectory planner | `src/emc/tp/tp.c`, `tc.c`, `tcq.c`, `spherical_arc.c`, `blendmath.c`, `sp_scurve.c`, `ruckig_wrapper.c`, plus matching `*.h` files | Copy unchanged | Native realtime scheduling and motion process state are replaced by standalone probe setup | Vendor byte sync, per-file source probes, `linuxcnc_tp_api_probe` |
| Ruckig C planner support | Selected `src/emc/tp/cruckig/*.c` and `*.h` files in the manifest | Copy unchanged | Used as LinuxCNC planner support code through vendored TP sources | Vendor byte sync, per-file source probes |
| Posemath | `src/libnml/posemath/posemath.cc`, `_posemath.c`, `gomath.c`, `sincos.c`, and matching headers | Copy unchanged | `gomath.c` is compiled as C; `rtapi.h` shim is C/C++ compatible for this boundary | Vendor byte sync, per-file source probes, TP probe |
| RS274 interpreter state and parser | `src/emc/rs274ngc/modal_state.*`, `interp_internal.*`, `interp_read.cc`, `interp_check.cc`, `interp_execute.cc`, `interp_find.cc`, `interp_array.cc`, `interp_queue.*`, `rs274ngc*`, `units.h` | Copy unchanged | Python/remap/runtime edges are isolated in standalone wrappers and shims; parser and execution logic remain LinuxCNC source | Vendor byte sync, per-file source probes, interpreter harness fixtures |
| RS274 conversion semantics | `src/emc/rs274ngc/interp_convert.cc`, `interp_arc.cc`, `interp_inverse.cc`, `interp_cycles.cc`, `interp_g7x.cc`, `interp_o_word.cc`, `interp_write.cc` | Copy unchanged | Canonical calls are captured by standalone event sink functions; conversion behavior stays in vendored LinuxCNC files; feed-rate state is read back through the canonical runtime boundary during length-unit conversion | Vendor byte sync, per-file source probes, canonical fixture suite, no standalone `Interp::convert_g()` guard |
| Named parameters and tool slot status | `src/emc/rs274ngc/interp_namedparams.cc`, related interpreter headers | Copy unchanged | `_ini[...]` and `_hal[...]` resolve through standalone INI/HAL adapters while lookup order stays LinuxCNC-derived; current/selected tool slot reads for vendored `Interp::synch()` come from the standalone tool adapter | Vendor byte sync, source probe, `linuxcnc_namedparam_harness`, `linuxcnc_interp_init_harness` |
| Dynamic interpreter base | `src/emc/rs274ngc/interp_base.*` | Copy unchanged | `interp_base.cc` source probe uses standalone `EMC2_HOME` compile-time path boundary for LinuxCNC dynamic interpreter lookup | Vendor byte sync, `linuxcnc_interp_base_source_probe` |

## Dependency Matrix

| Dependency | LinuxCNC files that expose it | Standalone treatment |
| --- | --- | --- |
| Native file IO | `inifile.cc`, `rs274ngc_pre.cc`, parameter file paths | Allowed in native probes; browser OPFS remains a host-side adapter under `runtime/opfs/` |
| RTAPI | `rtapi_*.h`, TP, posemath, motion headers | Minimal standalone shim in `runtime/core/shims/rtapi.h` |
| NML transport | `emc.hh`, motion/NML type headers | Transport is not ported; only the status/type edges needed by vendored compute code are exposed through standalone shims and probes |
| HAL runtime | named parameter lookup, kinematics component lifecycle, and runtime status edges | Standalone HAL adapter under `runtime/core/linuxcnc_wrap/` |
| Python/remap | `rs274ngc_pre.cc`, `interp_o_word.cc`, remap hooks | Stubbed at runtime boundary; no Python CNC semantics are reimplemented |
| Canonical machine actions | `interp_convert.cc`, `interp_execute.cc`, `interp_queue.cc` | Captured by standalone canonical event sink functions for regression fixtures |
| Realtime scheduling | TP and motion headers | Not ported; native TP probes seed deterministic status/config state |
| GUI | None used as implementation | Native LinuxCNC GUI remains reference-only |

## Known Gaps

- Additional non-trivial kinematics implementation files are now extracted at
  source-probe level. Serial `genserkins`, hexapod `genhexkins`, and pentapod
  `pentakins` have native runtime baselines; full runtime machine baselines for
  userspace genser flows are not yet established.
- Cutter compensation positive motion and negative interpreter paths are
  fixture-covered through vendored `interp_convert.cc` and `interp_queue.cc`.
- Browser/WASM C ABI and JS SDK layers are not yet built for the full
  interpreter/planner core. The INI parser has a minimal JS SDK wrapper and
  Node/browser WASM smoke harnesses.
- OPFS persistence is connected to the INI panel through the host-side
  `runtime/opfs/file-service.js` adapter; tool table, parameter file, G-code
  program loading, and broader browser-level OPFS validation remain future
  work.
- Native LinuxCNC GUI code remains out of scope for implementation.