103 def corrupt_table_invalidate(qed, table):  argument
106     table[index] = qed.filesize + random.randint(0, 100 * 1024 * 1024 * 1024 * 1024)
108 def cmd_show(qed, *args):  argument
111         print(qed.header)
113         print(qed.l1_table)
116         print(qed.read_table(offset))
120 def cmd_duplicate(qed, table_level):  argument
123         offset = qed.header['l1_table_offset']
124         table = qed.l1_table
126         _, offset = random_table_item(qed.l1_table)
127         table = qed.read_table(offset)
131     qed.write_table(offset, table)
133 def cmd_invalidate(qed, table_level):  argument
136         offset = qed.header['l1_table_offset']
137         table = qed.l1_table
139         _, offset = random_table_item(qed.l1_table)
140         table = qed.read_table(offset)
143     corrupt_table_invalidate(qed, table)
144     qed.write_table(offset, table)
146 def cmd_need_check(qed, *args):  argument
149         print(bool(qed.header['features'] & QED_F_NEED_CHECK))
153         qed.header['features'] |= QED_F_NEED_CHECK
155         qed.header['features'] &= ~QED_F_NEED_CHECK
158     qed.store_header()
160 def cmd_zero_cluster(qed, pos, *args):  argument
169         l1_index = pos // qed.header['cluster_size'] // len(qed.l1_table)
170         if qed.l1_table[l1_index] == 0:
173         l2_offset = qed.l1_table[l1_index]
174         l2_table = qed.read_table(l2_offset)
176         l2_index = (pos // qed.header['cluster_size']) % len(qed.l1_table)
178         qed.write_table(l2_offset, l2_table)
179         pos += qed.header['cluster_size']
181 def cmd_copy_metadata(qed, outfile):  argument
186     out.seek(qed.filesize - 1)
191     header_size_bytes = qed.header['header_size'] * qed.header['cluster_size']
192     out.write(qed.raw_pread(0, header_size_bytes))
195     out.seek(qed.header['l1_table_offset'])
196     s = ''.join(pack_table_elem(x) for x in qed.l1_table)
200     for l2_offset in qed.l1_table:
203         l2_table = qed.read_table(l2_offset)
227     qed = QED(open(filename, 'r+b'))
229         globals()[cmd](qed, *sys.argv[3:])