1/* Copyright (C) 1995-2023 Free Software Foundation, Inc.
2 Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1995.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as published by
6 the Free Software Foundation; either version 2.1 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17#ifdef HAVE_CONFIG_H
18# include <config.h>
19#endif
20
21#include <stdlib.h>
22#include <string.h>
23#include <sys/types.h>
24
25#include "loadinfo.h"
26
27/* On some strange systems still no definition of NULL is found. Sigh! */
28#ifndef NULL
29# if defined __STDC__ && __STDC__
30# define NULL ((void *) 0)
31# else
32# define NULL 0
33# endif
34#endif
35
36/* @@ end of prolog @@ */
37
38/* Split a locale name NAME into a leading language part and all the
39 rest. Return a pointer to the first character after the language,
40 i.e. to the first byte of the rest. */
41static char *_nl_find_language (const char *name);
42
43static char *
44_nl_find_language (const char *name)
45{
46 while (name[0] != '\0' && name[0] != '_' && name[0] != '@' && name[0] != '.')
47 ++name;
48
49 return (char *) name;
50}
51
52
53int
54_nl_explode_name (char *name,
55 const char **language, const char **modifier,
56 const char **territory, const char **codeset,
57 const char **normalized_codeset)
58{
59 char *cp;
60 int mask;
61
62 *modifier = NULL;
63 *territory = NULL;
64 *codeset = NULL;
65 *normalized_codeset = NULL;
66
67 /* Now we determine the single parts of the locale name. First
68 look for the language. Termination symbols are `_', '.', and `@'. */
69 mask = 0;
70 *language = cp = name;
71 cp = _nl_find_language (*language);
72
73 if (*language == cp)
74 /* This does not make sense: language has to be specified. Use
75 this entry as it is without exploding. Perhaps it is an alias. */
76 cp = strchr (*language, '\0');
77 else
78 {
79 if (cp[0] == '_')
80 {
81 /* Next is the territory. */
82 cp[0] = '\0';
83 *territory = ++cp;
84
85 while (cp[0] != '\0' && cp[0] != '.' && cp[0] != '@')
86 ++cp;
87
88 mask |= XPG_TERRITORY;
89 }
90
91 if (cp[0] == '.')
92 {
93 /* Next is the codeset. */
94 cp[0] = '\0';
95 *codeset = ++cp;
96
97 while (cp[0] != '\0' && cp[0] != '@')
98 ++cp;
99
100 mask |= XPG_CODESET;
101
102 if (*codeset != cp && (*codeset)[0] != '\0')
103 {
104 *normalized_codeset = _nl_normalize_codeset (*codeset,
105 cp - *codeset);
106 if (*normalized_codeset == NULL)
107 return -1;
108 else if (strcmp (*codeset, *normalized_codeset) == 0)
109 free ((char *) *normalized_codeset);
110 else
111 mask |= XPG_NORM_CODESET;
112 }
113 }
114 }
115
116 if (cp[0] == '@')
117 {
118 /* Next is the modifier. */
119 cp[0] = '\0';
120 *modifier = ++cp;
121
122 if (cp[0] != '\0')
123 mask |= XPG_MODIFIER;
124 }
125
126 if (*territory != NULL && (*territory)[0] == '\0')
127 mask &= ~XPG_TERRITORY;
128
129 if (*codeset != NULL && (*codeset)[0] == '\0')
130 mask &= ~XPG_CODESET;
131
132 return mask;
133}
134