vendor/regex-0.2.5/scripts/regex-match-tests.py

   1 #!/usr/bin/env python2
   2
   3 # Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   4 # file at the top-level directory of this distribution and at
   5 # http://rust-lang.org/COPYRIGHT.
   6 #
   7 # Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   8 # http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   9 # <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
  10 # option. This file may not be copied, modified, or distributed
  11 # except according to those terms.
  12
  13 from __future__ import absolute_import, division, print_function
  14 import argparse
  15 import datetime
  16 import os.path as path
  17
  18
  19 def print_tests(tests):
  20     print('\n'.join([test_tostr(t) for t in tests]))
  21
  22
  23 def read_tests(f):
  24     basename, _ = path.splitext(path.basename(f))
  25     tests = []
  26     for lineno, line in enumerate(open(f), 1):
  27         fields = filter(None, map(str.strip, line.split('\t')))
  28         if not (4 <= len(fields) <= 5) \
  29            or 'E' not in fields[0] or fields[0][0] == '#':
  30             continue
  31
  32         opts, pat, text, sgroups = fields[0:4]
  33         groups = []  # groups as integer ranges
  34         if sgroups == 'NOMATCH':
  35             groups = [None]
  36         elif ',' in sgroups:
  37             noparen = map(lambda s: s.strip('()'), sgroups.split(')('))
  38             for g in noparen:
  39                 s, e = map(str.strip, g.split(','))
  40                 if s == '?' and e == '?':
  41                     groups.append(None)
  42                 else:
  43                     groups.append((int(s), int(e)))
  44         else:
  45             # This skips tests that should result in an error.
  46             # There aren't many, so I think we can just capture those
  47             # manually. Possibly fix this in future.
  48             continue
  49
  50         if pat == 'SAME':
  51             pat = tests[-1][1]
  52         if '$' in opts:
  53             pat = pat.decode('string_escape')
  54             text = text.decode('string_escape')
  55         if 'i' in opts:
  56             pat = '(?i)%s' % pat
  57
  58         name = '%s_%d' % (basename, lineno)
  59         tests.append((name, pat, text, groups))
  60     return tests
  61
  62
  63 def test_tostr(t):
  64     lineno, pat, text, groups = t
  65     options = map(group_tostr, groups)
  66     return 'mat!(match_%s, r"%s", r"%s", %s);' \
  67            % (lineno, pat, '' if text == "NULL" else text, ', '.join(options))
  68
  69
  70 def group_tostr(g):
  71     if g is None:
  72         return 'None'
  73     else:
  74         return 'Some((%d, %d))' % (g[0], g[1])
  75
  76
  77 if __name__ == '__main__':
  78     parser = argparse.ArgumentParser(
  79         description='Generate match tests from an AT&T POSIX test file.')
  80     aa = parser.add_argument
  81     aa('files', nargs='+',
  82        help='A list of dat AT&T POSIX test files. See src/testdata')
  83     args = parser.parse_args()
  84
  85     tests = []
  86     for f in args.files:
  87         tests += read_tests(f)
  88
  89     tpl = '''// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
  90 // file at the top-level directory of this distribution and at
  91 // http://rust-lang.org/COPYRIGHT.
  92 //
  93 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
  94 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
  95 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
  96 // option. This file may not be copied, modified, or distributed
  97 // except according to those terms.
  98
  99 // DO NOT EDIT. Automatically generated by 'scripts/regex-match-tests.py'
 100 // on {date}.
 101 '''
 102     print(tpl.format(date=str(datetime.datetime.now())))
 103
 104     for f in args.files:
 105         print('// Tests from %s' % path.basename(f))
 106         print_tests(read_tests(f))
 107         print('')