1 /* Test collation function using real data.
2 Copyright (C) 1997-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
33 static int xstrcoll (const void *, const void *);
38 return (0 < n) - (n < 0);
42 main (int argc, char *argv[])
45 size_t nstrings, nstrings_max;
46 struct lines *strings;
52 error (1, 0, "usage: %s <random seed>", argv[0]);
54 setlocale (LC_ALL, "");
58 strings = (struct lines *) malloc (nstrings_max * sizeof (struct lines));
68 if (getline (&line, &len, stdin) < 0)
71 if (nstrings == nstrings_max)
73 strings = (struct lines *) realloc (strings,
82 strings[nstrings].line = strdup (line);
83 l = strcspn (line, ":(;");
84 while (l > 0 && isspace (line[l - 1]))
86 strings[nstrings].key = strndup (line, l);
92 srandom (atoi (argv[1]));
93 for (n = 0; n < 10 * nstrings; ++n)
96 size_t idx1 = random () % nstrings;
97 size_t idx2 = random () % nstrings;
98 struct lines tmp = strings[idx1];
99 strings[idx1] = strings[idx2];
102 /* While we are at it a first little test. */
103 r1 = strcoll (strings[idx1].key, strings[idx2].key);
104 r2 = strcoll (strings[idx2].key, strings[idx1].key);
106 if (signum (r1) != - signum (r2))
107 printf ("`%s' and `%s' collate wrong: %d vs. %d\n",
108 strings[idx1].key, strings[idx2].key, r1, r2);
112 qsort (strings, nstrings, sizeof (struct lines), xstrcoll);
114 /* Print the result. */
115 for (n = 0; n < nstrings; ++n)
117 fputs (strings[n].line, stdout);
118 free (strings[n].line);
119 free (strings[n].key);
128 xstrcoll (const void *ptr1, const void *ptr2)
130 const struct lines *l1 = (const struct lines *) ptr1;
131 const struct lines *l2 = (const struct lines *) ptr2;
133 return strcoll (l1->key, l2->key);