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