cpython/Tools/unicode/mkstringprep.py at 2.7 · python-emscripten/cpython · GitHub

Repository navigation

History

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

359

360

361

362

363

364

365

366

367

368

369

370

371

372

373

374

375

376

377

378

379

380

381

382

383

384

385

386

387

388

389

390

391

392

393

394

395

396

397

398

399

400

401

402

403

404

405

406

407

408

409

410

411

412

413

414

415

416

417

418

419

420

421

422

423

424

425

import re, unicodedata, sys

if sys.maxunicode == 65535:

raise RuntimeError("need UCS-4 Python")

def gen_category(cats):

for i in range(0, 0x110000):

if unicodedata.category(unichr(i)) in cats:

yield(i)

def gen_bidirectional(cats):

for i in range(0, 0x110000):

if unicodedata.bidirectional(unichr(i)) in cats:

yield(i)

def compact_set(l):

single = []

tuple = []

prev = None

span = 0

for e in l:

if prev is None:

prev = e

span = 0

continue

if prev+span+1 != e:

if span > 2:

tuple.append((prev,prev+span+1))

else:

for i in range(prev, prev+span+1):

single.append(i)

prev = e

span = 0

else:

span += 1

if span:

tuple.append((prev,prev+span+1))

else:

single.append(prev)

tuple = " + ".join(["range(%d,%d)" % t for t in tuple])

if not single:

return "set(%s)" % tuple

if not tuple:

return "set(%s)" % repr(single)

return "set(%s + %s)" % (repr(single),tuple)

############## Read the tables in the RFC #######################

data = open("rfc3454.txt").readlines()

tables = []

curname = None

for l in data:

l = l.strip()

if not l:

continue

# Skip RFC page breaks

if l.startswith("Hoffman & Blanchet") or\

l.startswith("RFC 3454"):

continue

# Find start/end lines

m = re.match("----- (Start|End) Table ([A-Z](.[0-9])+) -----", l)

if m:

if m.group(1) == "Start":

if curname:

raise RuntimeError("Double Start", (curname, l))

curname = m.group(2)

table = {}

tables.append((curname, table))

continue

else:

if not curname:

raise RuntimeError("End without start", l)

curname = None

continue

if not curname:

continue

# Now we are in a table

fields = l.split(";")

if len(fields) > 1:

# Drop comment field

fields = fields[:-1]

if len(fields) == 1:

fields = fields[0].split("-")

if len(fields) > 1:

# range

try:

start, end = fields

except ValueError:

raise RuntimeError("Unpacking problem", l)

else:

start = end = fields[0]

start = int(start, 16)

end = int(end, 16)

for i in range(start, end+1):

table[i] = i

else:

code, value = fields

value = value.strip()

if value:

value = [int(v, 16) for v in value.split(" ")]

else:

# table B.1

value = None

table[int(code, 16)] = value

########### Generate compact Python versions of the tables #############

print """# This file is generated by mkstringprep.py. DO NOT EDIT.

\"\"\"Library that exposes various tables found in the StringPrep RFC 3454.

There are two kinds of tables: sets, for which a member test is provided,

and mappings, for which a mapping function is provided.

\"\"\"

import unicodedata

"""

print "assert unicodedata.unidata_version == %s" % repr(unicodedata.unidata_version)

# A.1 is the table of unassigned characters

# XXX Plane 15 PUA is listed as unassigned in Python.

name, table = tables[0]

del tables[0]

assert name == "A.1"

table = set(table.keys())

Cn = set(gen_category(["Cn"]))

# FDD0..FDEF are process internal codes

Cn -= set(range(0xFDD0, 0xFDF0))

# not a character

Cn -= set(range(0xFFFE, 0x110000, 0x10000))

Cn -= set(range(0xFFFF, 0x110000, 0x10000))

# assert table == Cn

print """

def in_table_a1(code):

if unicodedata.category(code) != 'Cn': return False

c = ord(code)

if 0xFDD0 <= c < 0xFDF0: return False

return (c & 0xFFFF) not in (0xFFFE, 0xFFFF)

"""

# B.1 cannot easily be derived

name, table = tables[0]

del tables[0]

assert name == "B.1"

table = sorted(table.keys())

print """

b1_set = """ + compact_set(table) + """

def in_table_b1(code):

return ord(code) in b1_set

"""

# B.2 and B.3 is case folding.

# It takes CaseFolding.txt into account, which is

# not available in the Python database. Since

# B.2 is derived from B.3, we process B.3 first.

# B.3 supposedly *is* CaseFolding-3.2.0.txt.

name, table_b2 = tables[0]

del tables[0]

assert name == "B.2"

name, table_b3 = tables[0]

del tables[0]

assert name == "B.3"

# B.3 is mostly Python's .lower, except for a number

# of special cases, e.g. considering canonical forms.

b3_exceptions = {}

for k,v in table_b2.items():

if map(ord, unichr(k).lower()) != v:

b3_exceptions[k] = u"".join(map(unichr,v))

b3 = sorted(b3_exceptions.items())

print """

b3_exceptions = {"""

for i,(k,v) in enumerate(b3):

print "0x%x:%s," % (k, repr(v)),

if i % 4 == 3:

print "}"

print """

def map_table_b3(code):

r = b3_exceptions.get(ord(code))

if r is not None: return r

return code.lower()

"""

def map_table_b3(code):

r = b3_exceptions.get(ord(code))

if r is not None: return r

return code.lower()

# B.2 is case folding for NFKC. This is the same as B.3,

# except where NormalizeWithKC(Fold(a)) !=

# NormalizeWithKC(Fold(NormalizeWithKC(Fold(a))))

def map_table_b2(a):

al = map_table_b3(a)

b = unicodedata.normalize("NFKC", al)

bl = u"".join([map_table_b3(ch) for ch in b])

c = unicodedata.normalize("NFKC", bl)

if b != c:

return c

else:

return al

specials = {}

for k,v in table_b2.items():

if map(ord, map_table_b2(unichr(k))) != v:

specials[k] = v

# B.3 should not add any additional special cases

assert specials == {}

print """

def map_table_b2(a):

al = map_table_b3(a)

b = unicodedata.normalize("NFKC", al)

bl = u"".join([map_table_b3(ch) for ch in b])

c = unicodedata.normalize("NFKC", bl)

if b != c:

return c

else:

return al

"""

# C.1.1 is a table with a single character

name, table = tables[0]

del tables[0]

assert name == "C.1.1"

assert table == {0x20:0x20}

print """

def in_table_c11(code):

return code == u" "

"""

# C.1.2 is the rest of all space characters

name, table = tables[0]

del tables[0]

assert name == "C.1.2"

# table = set(table.keys())

# Zs = set(gen_category(["Zs"])) - set([0x20])

# assert Zs == table

print """

def in_table_c12(code):

return unicodedata.category(code) == "Zs" and code != u" "

def in_table_c11_c12(code):

return unicodedata.category(code) == "Zs"

"""

# C.2.1 ASCII control characters

name, table_c21 = tables[0]

del tables[0]

assert name == "C.2.1"

Cc = set(gen_category(["Cc"]))

Cc_ascii = Cc & set(range(128))

table_c21 = set(table_c21.keys())

assert Cc_ascii == table_c21

print """

def in_table_c21(code):

return ord(code) < 128 and unicodedata.category(code) == "Cc"

"""

# C.2.2 Non-ASCII control characters. It also includes

# a number of characters in category Cf.

name, table_c22 = tables[0]

del tables[0]

assert name == "C.2.2"

Cc_nonascii = Cc - Cc_ascii

table_c22 = set(table_c22.keys())

assert len(Cc_nonascii - table_c22) == 0

specials = list(table_c22 - Cc_nonascii)

specials.sort()

print """c22_specials = """ + compact_set(specials) + """

def in_table_c22(code):

c = ord(code)

if c < 128: return False

if unicodedata.category(code) == "Cc": return True

return c in c22_specials

def in_table_c21_c22(code):

return unicodedata.category(code) == "Cc" or \\

ord(code) in c22_specials

"""

# C.3 Private use

name, table = tables[0]

del tables[0]

assert name == "C.3"

Co = set(gen_category(["Co"]))

assert set(table.keys()) == Co

print """

def in_table_c3(code):

return unicodedata.category(code) == "Co"

"""

# C.4 Non-character code points, xFFFE, xFFFF

# plus process internal codes

name, table = tables[0]

del tables[0]

assert name == "C.4"

nonchar = set(range(0xFDD0,0xFDF0) +

range(0xFFFE,0x110000,0x10000) +

range(0xFFFF,0x110000,0x10000))

table = set(table.keys())

assert table == nonchar

print """

def in_table_c4(code):

c = ord(code)

if c < 0xFDD0: return False

if c < 0xFDF0: return True

return (ord(code) & 0xFFFF) in (0xFFFE, 0xFFFF)

"""

# C.5 Surrogate codes

name, table = tables[0]

del tables[0]

assert name == "C.5"

Cs = set(gen_category(["Cs"]))

assert set(table.keys()) == Cs

print """

def in_table_c5(code):

return unicodedata.category(code) == "Cs"

"""

# C.6 Inappropriate for plain text

name, table = tables[0]

del tables[0]

assert name == "C.6"

table = sorted(table.keys())

print """

c6_set = """ + compact_set(table) + """

def in_table_c6(code):

return ord(code) in c6_set

"""

# C.7 Inappropriate for canonical representation

name, table = tables[0]

del tables[0]

assert name == "C.7"

table = sorted(table.keys())

print """

c7_set = """ + compact_set(table) + """

def in_table_c7(code):

return ord(code) in c7_set

"""

# C.8 Change display properties or are deprecated

name, table = tables[0]

del tables[0]

assert name == "C.8"

table = sorted(table.keys())

print """

c8_set = """ + compact_set(table) + """

def in_table_c8(code):

return ord(code) in c8_set

"""

# C.9 Tagging characters

name, table = tables[0]

del tables[0]

assert name == "C.9"

table = sorted(table.keys())

print """

c9_set = """ + compact_set(table) + """

def in_table_c9(code):

return ord(code) in c9_set

"""

# D.1 Characters with bidirectional property "R" or "AL"

name, table = tables[0]

del tables[0]

assert name == "D.1"

RandAL = set(gen_bidirectional(["R","AL"]))

assert set(table.keys()) == RandAL

print """

def in_table_d1(code):

return unicodedata.bidirectional(code) in ("R","AL")

"""

# D.2 Characters with bidirectional property "L"

name, table = tables[0]

del tables[0]

assert name == "D.2"

L = set(gen_bidirectional(["L"]))

assert set(table.keys()) == L

print """

def in_table_d2(code):

return unicodedata.bidirectional(code) == "L"

"""

cpython/Tools/unicode/mkstringprep.py at 2.7 · python-emscripten/cpython · GitHub

Repository navigation

Expand file tree

Breadcrumbs

mkstringprep.py

Latest commit

History

Breadcrumbs

mkstringprep.py

File metadata and controls