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eda-orcad
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README.en.md

@file-viewer/eda-orcad

Framework-neutral OrCAD / Allegro binary inspection helpers for Flyfish File Viewer. It provides CFB/OLE2 detection, safe text sampling, hex preview, and string extraction primitives without any UI dependency.

import {
  isOrcadCompoundFile,
  collectOrcadStrings,
  decodeOrcadSample,
} from '@file-viewer/eda-orcad'

const bytes = new Uint8Array(buffer)
const isCfb = isOrcadCompoundFile(bytes)
const strings = collectOrcadStrings([bytes])
const sample = decodeOrcadSample(bytes)

Scope

  • Used by .olb, .dra, .psm, .pad, and related OrCAD / Allegro proprietary binaries for structural indexing and safe fallback preview.
  • No UI framework and no DOM dependency.
  • Full symbol / footprint geometry parsing remains a separate C++ WASM or staged TypeScript porting path based on OpenOrCadParser / OpenAllegroParser style engines.

Why This Package Exists

The public OrCAD / Allegro file format surface is limited. Keeping binary inspection and future WASM parser boundaries in a separate package lets @file-viewer/renderer-eda stay focused on presentation while the engine evolves independently.