| /* Expression parsing for plural form selection. |
| Copyright (C) 2000, 2001 Free Software Foundation, Inc. |
| Written by Ulrich Drepper <drepper@cygnus.com>, 2000. |
| |
| This program is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Library General Public License as published |
| by the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| This program 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, |
| USA. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <ctype.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "plural-exp.h" |
| |
| #if (defined __GNUC__ && !defined __APPLE_CC__) \ |
| || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L) |
| |
| /* These structs are the constant expression for the germanic plural |
| form determination. It represents the expression "n != 1". */ |
| static const struct expression plvar = |
| { |
| .nargs = 0, |
| .operation = var, |
| }; |
| static const struct expression plone = |
| { |
| .nargs = 0, |
| .operation = num, |
| .val = |
| { |
| .num = 1 |
| } |
| }; |
| struct expression GERMANIC_PLURAL = |
| { |
| .nargs = 2, |
| .operation = not_equal, |
| .val = |
| { |
| .args = |
| { |
| [0] = (struct expression *) &plvar, |
| [1] = (struct expression *) &plone |
| } |
| } |
| }; |
| |
| # define INIT_GERMANIC_PLURAL() |
| |
| #else |
| |
| /* For compilers without support for ISO C 99 struct/union initializers: |
| Initialization at run-time. */ |
| |
| static struct expression plvar; |
| static struct expression plone; |
| struct expression GERMANIC_PLURAL; |
| |
| static void |
| init_germanic_plural () |
| { |
| if (plone.val.num == 0) |
| { |
| plvar.nargs = 0; |
| plvar.operation = var; |
| |
| plone.nargs = 0; |
| plone.operation = num; |
| plone.val.num = 1; |
| |
| GERMANIC_PLURAL.nargs = 2; |
| GERMANIC_PLURAL.operation = not_equal; |
| GERMANIC_PLURAL.val.args[0] = &plvar; |
| GERMANIC_PLURAL.val.args[1] = &plone; |
| } |
| } |
| |
| # define INIT_GERMANIC_PLURAL() init_germanic_plural () |
| |
| #endif |
| |
| void |
| internal_function |
| EXTRACT_PLURAL_EXPRESSION (nullentry, pluralp, npluralsp) |
| const char *nullentry; |
| struct expression **pluralp; |
| unsigned long int *npluralsp; |
| { |
| if (nullentry != NULL) |
| { |
| const char *plural; |
| const char *nplurals; |
| |
| plural = strstr (nullentry, "plural="); |
| nplurals = strstr (nullentry, "nplurals="); |
| if (plural == NULL || nplurals == NULL) |
| goto no_plural; |
| else |
| { |
| char *endp; |
| unsigned long int n; |
| struct parse_args args; |
| |
| /* First get the number. */ |
| nplurals += 9; |
| while (*nplurals != '\0' && isspace ((unsigned char) *nplurals)) |
| ++nplurals; |
| if (!(*nplurals >= '0' && *nplurals <= '9')) |
| goto no_plural; |
| #if defined HAVE_STRTOUL || defined _LIBC |
| n = strtoul (nplurals, &endp, 10); |
| #else |
| for (endp = nplurals, n = 0; *endp >= '0' && *endp <= '9'; endp++) |
| n = n * 10 + (*endp - '0'); |
| #endif |
| if (nplurals == endp) |
| goto no_plural; |
| *npluralsp = n; |
| |
| /* Due to the restrictions bison imposes onto the interface of the |
| scanner function we have to put the input string and the result |
| passed up from the parser into the same structure which address |
| is passed down to the parser. */ |
| plural += 7; |
| args.cp = plural; |
| if (PLURAL_PARSE (&args) != 0) |
| goto no_plural; |
| *pluralp = args.res; |
| } |
| } |
| else |
| { |
| /* By default we are using the Germanic form: singular form only |
| for `one', the plural form otherwise. Yes, this is also what |
| English is using since English is a Germanic language. */ |
| no_plural: |
| INIT_GERMANIC_PLURAL (); |
| *pluralp = &GERMANIC_PLURAL; |
| *npluralsp = 2; |
| } |
| } |