Ryan Malloy
3bf4f6bed2
Ports the read path of FreeRouting's io/specctra/parser package to a Java-free Python implementation: - tokenizer: S-expression lexer mirroring SpecctraFileDescription.flex (comments, quoted strings, the string_quote IGNORE_QUOTE directive, case-insensitive keywords, and hash-prefixed names) - sexp: nested S-expression tree builder - shapes: rect/circle/polygon/path plus area-with-holes scopes - model: typed dataclasses for layers, padstacks, images, placements, nets, net classes, rules, keepouts - reader: recursive-descent scope readers producing a DsnBoard, one _read_* function per FreeRouting read_scope method 46 pytest cases cover the tokenizer, tree, shapes, and end-to-end parsing against hand-crafted fixtures modeled on FreeRouting's own test DSN files. Parses 90 of 91 upstream fixtures (the one failure is a binary OLE file, not text DSN).
1.1 KiB
1.1 KiB
DSN test fixtures
Hand-crafted minimal Specctra DSN files, written to exercise the parser. They
are modeled on the real fixtures shipped in the upstream FreeRouting repo
(fixtures/empty_board.dsn and fixtures/SMD-routing-issue-demo.dsn) so the
grammar and formatting match what kicad-cli pcb export specctra-dsn and
FreeRouting itself produce, but they were typed fresh here (no upstream file is
copied into this tree).
empty_board.dsn— the smallest valid board: parser, resolution, unit, and a structure with two signal layers and apcbboundary path. Modeled on FreeRoutingfixtures/empty_board.dsn.smd_demo.dsn— a fuller board exercising every scope the parser handles: quoted board/padstack/image names,via, defaultrule(width + clearance with a(type smd_smd)pair), akeepout, padstacks (rect and circle pads), images with pins, placement withfront/rotation, nets withComp-Pinreferences, and aclasswithcircuit/use_viaand arule. Modeled on FreeRoutingfixtures/SMD-routing-issue-demo.dsn.