| 1 | /* Expression parsing for plural form selection.
|
|---|
| 2 | Copyright (C) 2000, 2001 Free Software Foundation, Inc.
|
|---|
| 3 | Written by Ulrich Drepper <drepper@cygnus.com>, 2000.
|
|---|
| 4 |
|
|---|
| 5 | This program is free software; you can redistribute it and/or modify it
|
|---|
| 6 | under the terms of the GNU Library General Public License as published
|
|---|
| 7 | by the Free Software Foundation; either version 2, or (at your option)
|
|---|
| 8 | any later version.
|
|---|
| 9 |
|
|---|
| 10 | This program 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 | Library General Public License for more details.
|
|---|
| 14 |
|
|---|
| 15 | You should have received a copy of the GNU Library General Public
|
|---|
| 16 | License along with this program; if not, write to the Free Software
|
|---|
| 17 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
|
|---|
| 18 | USA. */
|
|---|
| 19 |
|
|---|
| 20 | #ifdef HAVE_CONFIG_H
|
|---|
| 21 | # include <config.h>
|
|---|
| 22 | #endif
|
|---|
| 23 |
|
|---|
| 24 | #include <ctype.h>
|
|---|
| 25 | #include <stdlib.h>
|
|---|
| 26 | #include <string.h>
|
|---|
| 27 |
|
|---|
| 28 | #include "plural-exp.h"
|
|---|
| 29 |
|
|---|
| 30 | #if (defined __GNUC__ && !defined __APPLE_CC__) \
|
|---|
| 31 | || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L)
|
|---|
| 32 |
|
|---|
| 33 | /* These structs are the constant expression for the germanic plural
|
|---|
| 34 | form determination. It represents the expression "n != 1". */
|
|---|
| 35 | static const struct expression plvar =
|
|---|
| 36 | {
|
|---|
| 37 | .nargs = 0,
|
|---|
| 38 | .operation = var,
|
|---|
| 39 | };
|
|---|
| 40 | static const struct expression plone =
|
|---|
| 41 | {
|
|---|
| 42 | .nargs = 0,
|
|---|
| 43 | .operation = num,
|
|---|
| 44 | .val =
|
|---|
| 45 | {
|
|---|
| 46 | .num = 1
|
|---|
| 47 | }
|
|---|
| 48 | };
|
|---|
| 49 | struct expression GERMANIC_PLURAL =
|
|---|
| 50 | {
|
|---|
| 51 | .nargs = 2,
|
|---|
| 52 | .operation = not_equal,
|
|---|
| 53 | .val =
|
|---|
| 54 | {
|
|---|
| 55 | .args =
|
|---|
| 56 | {
|
|---|
| 57 | [0] = (struct expression *) &plvar,
|
|---|
| 58 | [1] = (struct expression *) &plone
|
|---|
| 59 | }
|
|---|
| 60 | }
|
|---|
| 61 | };
|
|---|
| 62 |
|
|---|
| 63 | # define INIT_GERMANIC_PLURAL()
|
|---|
| 64 |
|
|---|
| 65 | #else
|
|---|
| 66 |
|
|---|
| 67 | /* For compilers without support for ISO C 99 struct/union initializers:
|
|---|
| 68 | Initialization at run-time. */
|
|---|
| 69 |
|
|---|
| 70 | static struct expression plvar;
|
|---|
| 71 | static struct expression plone;
|
|---|
| 72 | struct expression GERMANIC_PLURAL;
|
|---|
| 73 |
|
|---|
| 74 | static void
|
|---|
| 75 | init_germanic_plural ()
|
|---|
| 76 | {
|
|---|
| 77 | if (plone.val.num == 0)
|
|---|
| 78 | {
|
|---|
| 79 | plvar.nargs = 0;
|
|---|
| 80 | plvar.operation = var;
|
|---|
| 81 |
|
|---|
| 82 | plone.nargs = 0;
|
|---|
| 83 | plone.operation = num;
|
|---|
| 84 | plone.val.num = 1;
|
|---|
| 85 |
|
|---|
| 86 | GERMANIC_PLURAL.nargs = 2;
|
|---|
| 87 | GERMANIC_PLURAL.operation = not_equal;
|
|---|
| 88 | GERMANIC_PLURAL.val.args[0] = &plvar;
|
|---|
| 89 | GERMANIC_PLURAL.val.args[1] = &plone;
|
|---|
| 90 | }
|
|---|
| 91 | }
|
|---|
| 92 |
|
|---|
| 93 | # define INIT_GERMANIC_PLURAL() init_germanic_plural ()
|
|---|
| 94 |
|
|---|
| 95 | #endif
|
|---|
| 96 |
|
|---|
| 97 | void
|
|---|
| 98 | internal_function
|
|---|
| 99 | EXTRACT_PLURAL_EXPRESSION (nullentry, pluralp, npluralsp)
|
|---|
| 100 | const char *nullentry;
|
|---|
| 101 | 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 | }
|
|---|
