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#!/usr/bin/env python3
# Author: cirakg & claude ai
# Summary: Generate test/data/CodeVectors.mc: zxing-cpp reference module rows for the linear barcode encoders.
"""Reference module rows for README 12.4 check 1 (all fake payloads).
For every linear symbology: fixed edge cases plus seeded random payloads,
each with the options the watch uses and zxing-cpp's module row. Where the
watch adds something zxing doesn't (a Code 39 or ITF check character, Codabar
start/stop characters), the reference is made from the completed text.
gen_code_vectors.py [--seed 1212] [--count 25] [--out test/data/CodeVectors.mc]
"""
from __future__ import annotations
import argparse
import random
import string
from pathlib import Path
import barcode_ref as ref
CHECK_ADD, CHECK_FIX, CHECK_OFF = 0, 1, 2
TEXT_ON = 0x10
def options(check: int) -> int:
return TEXT_ON | (check << 2) | 1
def digits(rng: random.Random, n: int) -> str:
return "".join(rng.choice(string.digits) for _ in range(n))
def valid_upce(rng: random.Random) -> str:
"""Six UPC-E digits that are a canonical zero suppression."""
while True:
d = digits(rng, 6)
last = d[5]
if (last == "3" and d[2] in "012") or (last == "4" and d[3] == "0") or (last in "56789" and d[4] == "0"):
continue
return d
def cases(rng: random.Random, count: int) -> list[tuple[int, str, int, str]]:
"""(symbology, payload, options, zxing text) tuples."""
out: list[tuple[int, str, int, str]] = []
fixed = [
(ref.EAN13, "590123412345", options(CHECK_ADD), "590123412345"),
(ref.EAN13, "5901234123457", options(CHECK_ADD), "5901234123457"),
(ref.EAN8, "1234567", options(CHECK_ADD), "1234567"),
(ref.UPCA, "01234567890", options(CHECK_ADD), "01234567890"),
(ref.UPCE, "0425261", options(CHECK_ADD), "0425261"),
(ref.UPCE, "1234565", options(CHECK_ADD), "1234565"),
(ref.CODE128, "1234", options(CHECK_ADD), "1234"),
(ref.CODE128, "123456789", options(CHECK_ADD), "123456789"),
(ref.CODE128, "AB12345678", options(CHECK_ADD), "AB12345678"),
(ref.CODE128, "A1234B12345", options(CHECK_ADD), "A1234B12345"),
(ref.CODE128, " ~", options(CHECK_ADD), " ~"),
(ref.CODE39, "CODE 39", options(CHECK_OFF), "CODE 39"),
(ref.CODE39, "CODE-39", options(CHECK_ADD), "CODE-39" + ref.code39_check("CODE-39")),
(ref.ITF, "1234", options(CHECK_OFF), "1234"),
(ref.ITF, "123", options(CHECK_ADD), "123" + str(ref.gs1_check("123"))),
(ref.CODABAR, "A40156B", options(CHECK_ADD), "A40156B"),
(ref.CODABAR, "31117013206375", options(CHECK_ADD), "A31117013206375A"),
]
out.extend(fixed)
printable = string.ascii_letters + string.digits + " !#$%&()*+,-./:;<=>?@[]^_{|}~"
for _ in range(count):
out.append((ref.EAN13, digits(rng, 12), options(CHECK_ADD), ""))
out.append((ref.EAN8, digits(rng, 7), options(CHECK_ADD), ""))
out.append((ref.UPCA, digits(rng, 11), options(CHECK_ADD), ""))
out.append((ref.UPCE, rng.choice("01") + valid_upce(rng), options(CHECK_ADD), ""))
n = rng.randint(1, 20)
mixed = "".join(rng.choice(string.digits) if rng.random() < 0.5 else rng.choice(printable) for _ in range(n))
out.append((ref.CODE128, mixed, options(CHECK_ADD), mixed))
c39 = "".join(rng.choice(ref.CODE39_ALPHABET) for _ in range(rng.randint(1, 12)))
with_check = rng.random() < 0.5
out.append(
(
ref.CODE39,
c39,
options(CHECK_ADD if with_check else CHECK_OFF),
c39 + ref.code39_check(c39) if with_check else c39,
)
)
itf = digits(rng, 2 * rng.randint(1, 8))
out.append((ref.ITF, itf, options(CHECK_OFF), itf))
inner = "".join(rng.choice("0123456789-$:/.+") for _ in range(rng.randint(1, 12)))
guard = rng.choice("ABCD") + inner + rng.choice("ABCD")
out.append((ref.CODABAR, guard, options(CHECK_ADD), guard))
return out
def render(rows: list[tuple[int, str, int, str]], seed: int) -> str:
lines = []
for symbology, payload, opts, text in rows:
modules = ref.reference_modules(symbology, text or payload)
escaped = payload.replace("\\", "\\\\").replace('"', '\\"')
lines.append(f' [{symbology}, "{escaped}", {opts}, "{modules}"]')
body = ",\n".join(lines)
return (
"// Author: cirakg & claude ai\n"
"// Summary: zxing-cpp reference module rows for the linear barcode encoders (generated; do not edit).\n"
f"//\n// Generated by tools/gen_code_vectors.py, seed {seed}. Rows: [symbology, payload, options,\n"
"// expected modules without quiet zones]. Fake payloads only.\n\n"
"import Toybox.Lang;\n\n(:test)\nmodule CodeVectors {\n const LINEAR = [\n" + body + "\n ];\n}\n"
)
def main(argv: list[str] | None = None) -> int:
parser = argparse.ArgumentParser(description=__doc__.splitlines()[0])
parser.add_argument("--seed", type=int, default=1212)
parser.add_argument("--count", type=int, default=25)
parser.add_argument("--out", type=Path, default=Path("test/data/CodeVectors.mc"))
args = parser.parse_args(argv)
rows = cases(random.Random(args.seed), args.count)
args.out.write_text(render(rows, args.seed), encoding="utf-8")
print(f"wrote {len(rows)} reference rows to {args.out}")
return 0
if __name__ == "__main__":
raise SystemExit(main())
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