1 /* $NetBSD: plural-exp.c,v 1.1.1.1 2016/01/14 00:11:28 christos Exp $ */
2
3 /* Expression parsing for plural form selection.
4 Copyright (C) 2000-2001, 2003 Free Software Foundation, Inc.
5 Written by Ulrich Drepper <drepper@cygnus.com>, 2000.
6
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Library General Public License as published
9 by the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
16
17 You should have received a copy of the GNU Library General Public
18 License along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
20 USA. */
21
22 #ifdef HAVE_CONFIG_H
23 # include <config.h>
24 #endif
25
26 #include <ctype.h>
27 #include <stdlib.h>
28 #include <string.h>
29
30 #include "plural-exp.h"
31
32 #if (defined __GNUC__ && !defined __APPLE_CC__) \
33 || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
34
35 /* These structs are the constant expression for the germanic plural
36 form determination. It represents the expression "n != 1". */
37 static const struct expression plvar =
38 {
39 .nargs = 0,
40 .operation = var,
41 };
42 static const struct expression plone =
43 {
44 .nargs = 0,
45 .operation = num,
46 .val =
47 {
48 .num = 1
49 }
50 };
51 struct expression GERMANIC_PLURAL =
52 {
53 .nargs = 2,
54 .operation = not_equal,
55 .val =
56 {
57 .args =
58 {
59 [0] = (struct expression *) &plvar,
60 [1] = (struct expression *) &plone
61 }
62 }
63 };
64
65 # define INIT_GERMANIC_PLURAL()
66
67 #else
68
69 /* For compilers without support for ISO C 99 struct/union initializers:
70 Initialization at run-time. */
71
72 static struct expression plvar;
73 static struct expression plone;
74 struct expression GERMANIC_PLURAL;
75
76 static void
init_germanic_plural()77 init_germanic_plural ()
78 {
79 if (plone.val.num == 0)
80 {
81 plvar.nargs = 0;
82 plvar.operation = var;
83
84 plone.nargs = 0;
85 plone.operation = num;
86 plone.val.num = 1;
87
88 GERMANIC_PLURAL.nargs = 2;
89 GERMANIC_PLURAL.operation = not_equal;
90 GERMANIC_PLURAL.val.args[0] = &plvar;
91 GERMANIC_PLURAL.val.args[1] = &plone;
92 }
93 }
94
95 # define INIT_GERMANIC_PLURAL() init_germanic_plural ()
96
97 #endif
98
99 void
100 internal_function
EXTRACT_PLURAL_EXPRESSION(const char * nullentry,struct expression ** pluralp,unsigned long int * npluralsp)101 EXTRACT_PLURAL_EXPRESSION (const char *nullentry, struct expression **pluralp,
102 unsigned long int *npluralsp)
103 {
104 if (nullentry != NULL)
105 {
106 const char *plural;
107 const char *nplurals;
108
109 plural = strstr (nullentry, "plural=");
110 nplurals = strstr (nullentry, "nplurals=");
111 if (plural == NULL || nplurals == NULL)
112 goto no_plural;
113 else
114 {
115 char *endp;
116 unsigned long int n;
117 struct parse_args args;
118
119 /* First get the number. */
120 nplurals += 9;
121 while (*nplurals != '\0' && isspace ((unsigned char) *nplurals))
122 ++nplurals;
123 if (!(*nplurals >= '0' && *nplurals <= '9'))
124 goto no_plural;
125 #if defined HAVE_STRTOUL || defined _LIBC
126 n = strtoul (nplurals, &endp, 10);
127 #else
128 for (endp = nplurals, n = 0; *endp >= '0' && *endp <= '9'; endp++)
129 n = n * 10 + (*endp - '0');
130 #endif
131 if (nplurals == endp)
132 goto no_plural;
133 *npluralsp = n;
134
135 /* Due to the restrictions bison imposes onto the interface of the
136 scanner function we have to put the input string and the result
137 passed up from the parser into the same structure which address
138 is passed down to the parser. */
139 plural += 7;
140 args.cp = plural;
141 if (PLURAL_PARSE (&args) != 0)
142 goto no_plural;
143 *pluralp = args.res;
144 }
145 }
146 else
147 {
148 /* By default we are using the Germanic form: singular form only
149 for `one', the plural form otherwise. Yes, this is also what
150 English is using since English is a Germanic language. */
151 no_plural:
152 INIT_GERMANIC_PLURAL ();
153 *pluralp = &GERMANIC_PLURAL;
154 *npluralsp = 2;
155 }
156 }
157