1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
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
|
/* Test collation function using real data.
Copyright (C) 1997-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <ctype.h>
#include <error.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct lines
{
char *key;
char *line;
};
static int xstrcoll (const void *, const void *);
static int
signum (int n)
{
return (0 < n) - (n < 0);
}
int
main (int argc, char *argv[])
{
int result = 0;
size_t nstrings, nstrings_max;
struct lines *strings;
char *line = NULL;
size_t len = 0;
size_t n;
if (argc < 2)
error (1, 0, "usage: %s <random seed>", argv[0]);
setlocale (LC_ALL, "");
nstrings_max = 100;
nstrings = 0;
strings = (struct lines *) malloc (nstrings_max * sizeof (struct lines));
if (strings == NULL)
{
perror (argv[0]);
exit (1);
}
while (1)
{
int l;
if (getline (&line, &len, stdin) < 0)
break;
if (nstrings == nstrings_max)
{
strings = (struct lines *) realloc (strings,
(nstrings_max *= 2)
* sizeof (*strings));
if (strings == NULL)
{
perror (argv[0]);
exit (1);
}
}
strings[nstrings].line = strdup (line);
l = strcspn (line, ":(;");
while (l > 0 && isspace (line[l - 1]))
--l;
strings[nstrings].key = strndup (line, l);
++nstrings;
}
free (line);
/* First shuffle. */
srandom (atoi (argv[1]));
for (n = 0; n < 10 * nstrings; ++n)
{
int r1, r2;
size_t idx1 = random () % nstrings;
size_t idx2 = random () % nstrings;
struct lines tmp = strings[idx1];
strings[idx1] = strings[idx2];
strings[idx2] = tmp;
/* While we are at it a first little test. */
r1 = strcoll (strings[idx1].key, strings[idx2].key);
r2 = strcoll (strings[idx2].key, strings[idx1].key);
if (signum (r1) != - signum (r2))
printf ("`%s' and `%s' collate wrong: %d vs. %d\n",
strings[idx1].key, strings[idx2].key, r1, r2);
}
/* Now sort. */
qsort (strings, nstrings, sizeof (struct lines), xstrcoll);
/* Print the result. */
for (n = 0; n < nstrings; ++n)
{
fputs (strings[n].line, stdout);
free (strings[n].line);
free (strings[n].key);
}
free (strings);
return result;
}
static int
xstrcoll (const void *ptr1, const void *ptr2)
{
const struct lines *l1 = (const struct lines *) ptr1;
const struct lines *l2 = (const struct lines *) ptr2;
return strcoll (l1->key, l2->key);
}
|
