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#!/usr/bin/env python3
# documentation precedes the symbol table; the boot header must skip those bytes.
import pathlib
import re
source = pathlib.Path('src/core/genome.h').read_text()
org = int(re.search(r'#define GORG (\d+)', source)[1])
length = int(re.search(r'#define GLEN (\d+)', source)[1])
words = [int(word.strip()) for word in re.search(r'genome\[\]\s*=\s*\{([\s\S]*?)\};', source)[1].split(',') if word.strip()]
assert len(words) == length and words[6] == org + length
cursor = words[5] - org
assert 7 <= cursor < length
records = {}
while words[cursor]:
kind, value, signature = words[cursor:cursor + 3]
assert kind in (1, 2, 3, 4, 6, 8), (cursor, kind)
cursor += 3
name = ''
while words[cursor]:
assert 0 < words[cursor] < 128, (cursor, words[cursor])
name += chr(words[cursor])
cursor += 1
cursor += 1
records[name] = (kind, value, signature)
assert cursor == length - 1
assert len(records) > 1000 and records['start'][0] == 1
assert records['reserve_code'][0] == 1 and records['build_image_grow'][0] == 1
assert any(name.startswith('doc ') for name in records), 'the fixture contains documentation bytes'
for name, (kind, value, _) in records.items():
if kind == 8:
assert org <= value < org + length and words[value - org] >= 0, name
print('ok documented genome starts its symbol table at the header address')
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