+++ /dev/null
-%{
-/* Expression parsing for plural form selection.
- Copyright (C) 2000-2001, 2003, 2005 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. */
-
-/* For bison < 2.0, the bison generated parser uses alloca. AIX 3 forces us
- to put this declaration at the beginning of the file. The declaration in
- bison's skeleton file comes too late. This must come before <config.h>
- because <config.h> may include arbitrary system headers.
- This can go away once the AM_INTL_SUBDIR macro requires bison >= 2.0. */
-#if defined _AIX && !defined __GNUC__
- #pragma alloca
-#endif
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include "plural-exp.h"
-
-/* The main function generated by the parser is called __gettextparse,
- but we want it to be called PLURAL_PARSE. */
-#ifndef _LIBC
-# define __gettextparse PLURAL_PARSE
-#endif
-
-#define YYLEX_PARAM &((struct parse_args *) arg)->cp
-#define YYPARSE_PARAM arg
-%}
-%pure_parser
-%expect 7
-
-%union {
- unsigned long int num;
- enum operator op;
- struct expression *exp;
-}
-
-%{
-/* Prototypes for local functions. */
-static int yylex (YYSTYPE *lval, const char **pexp);
-static void yyerror (const char *str);
-
-/* Allocation of expressions. */
-
-static struct expression *
-new_exp (int nargs, enum operator op, struct expression * const *args)
-{
- int i;
- struct expression *newp;
-
- /* If any of the argument could not be malloc'ed, just return NULL. */
- for (i = nargs - 1; i >= 0; i--)
- if (args[i] == NULL)
- goto fail;
-
- /* Allocate a new expression. */
- newp = (struct expression *) malloc (sizeof (*newp));
- if (newp != NULL)
- {
- newp->nargs = nargs;
- newp->operation = op;
- for (i = nargs - 1; i >= 0; i--)
- newp->val.args[i] = args[i];
- return newp;
- }
-
- fail:
- for (i = nargs - 1; i >= 0; i--)
- FREE_EXPRESSION (args[i]);
-
- return NULL;
-}
-
-static inline struct expression *
-new_exp_0 (enum operator op)
-{
- return new_exp (0, op, NULL);
-}
-
-static inline struct expression *
-new_exp_1 (enum operator op, struct expression *right)
-{
- struct expression *args[1];
-
- args[0] = right;
- return new_exp (1, op, args);
-}
-
-static struct expression *
-new_exp_2 (enum operator op, struct expression *left, struct expression *right)
-{
- struct expression *args[2];
-
- args[0] = left;
- args[1] = right;
- return new_exp (2, op, args);
-}
-
-static inline struct expression *
-new_exp_3 (enum operator op, struct expression *bexp,
- struct expression *tbranch, struct expression *fbranch)
-{
- struct expression *args[3];
-
- args[0] = bexp;
- args[1] = tbranch;
- args[2] = fbranch;
- return new_exp (3, op, args);
-}
-
-%}
-
-/* This declares that all operators have the same associativity and the
- precedence order as in C. See [Harbison, Steele: C, A Reference Manual].
- There is no unary minus and no bitwise operators.
- Operators with the same syntactic behaviour have been merged into a single
- token, to save space in the array generated by bison. */
-%right '?' /* ? */
-%left '|' /* || */
-%left '&' /* && */
-%left EQUOP2 /* == != */
-%left CMPOP2 /* < > <= >= */
-%left ADDOP2 /* + - */
-%left MULOP2 /* * / % */
-%right '!' /* ! */
-
-%token <op> EQUOP2 CMPOP2 ADDOP2 MULOP2
-%token <num> NUMBER
-%type <exp> exp
-
-%%
-
-start: exp
- {
- if ($1 == NULL)
- YYABORT;
- ((struct parse_args *) arg)->res = $1;
- }
- ;
-
-exp: exp '?' exp ':' exp
- {
- $$ = new_exp_3 (qmop, $1, $3, $5);
- }
- | exp '|' exp
- {
- $$ = new_exp_2 (lor, $1, $3);
- }
- | exp '&' exp
- {
- $$ = new_exp_2 (land, $1, $3);
- }
- | exp EQUOP2 exp
- {
- $$ = new_exp_2 ($2, $1, $3);
- }
- | exp CMPOP2 exp
- {
- $$ = new_exp_2 ($2, $1, $3);
- }
- | exp ADDOP2 exp
- {
- $$ = new_exp_2 ($2, $1, $3);
- }
- | exp MULOP2 exp
- {
- $$ = new_exp_2 ($2, $1, $3);
- }
- | '!' exp
- {
- $$ = new_exp_1 (lnot, $2);
- }
- | 'n'
- {
- $$ = new_exp_0 (var);
- }
- | NUMBER
- {
- if (($$ = new_exp_0 (num)) != NULL)
- $$->val.num = $1;
- }
- | '(' exp ')'
- {
- $$ = $2;
- }
- ;
-
-%%
-
-void
-internal_function
-FREE_EXPRESSION (struct expression *exp)
-{
- if (exp == NULL)
- return;
-
- /* Handle the recursive case. */
- switch (exp->nargs)
- {
- case 3:
- FREE_EXPRESSION (exp->val.args[2]);
- /* FALLTHROUGH */
- case 2:
- FREE_EXPRESSION (exp->val.args[1]);
- /* FALLTHROUGH */
- case 1:
- FREE_EXPRESSION (exp->val.args[0]);
- /* FALLTHROUGH */
- default:
- break;
- }
-
- free (exp);
-}
-
-
-static int
-yylex (YYSTYPE *lval, const char **pexp)
-{
- const char *exp = *pexp;
- int result;
-
- while (1)
- {
- if (exp[0] == '\0')
- {
- *pexp = exp;
- return YYEOF;
- }
-
- if (exp[0] != ' ' && exp[0] != '\t')
- break;
-
- ++exp;
- }
-
- result = *exp++;
- switch (result)
- {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- {
- unsigned long int n = result - '0';
- while (exp[0] >= '0' && exp[0] <= '9')
- {
- n *= 10;
- n += exp[0] - '0';
- ++exp;
- }
- lval->num = n;
- result = NUMBER;
- }
- break;
-
- case '=':
- if (exp[0] == '=')
- {
- ++exp;
- lval->op = equal;
- result = EQUOP2;
- }
- else
- result = YYERRCODE;
- break;
-
- case '!':
- if (exp[0] == '=')
- {
- ++exp;
- lval->op = not_equal;
- result = EQUOP2;
- }
- break;
-
- case '&':
- case '|':
- if (exp[0] == result)
- ++exp;
- else
- result = YYERRCODE;
- break;
-
- case '<':
- if (exp[0] == '=')
- {
- ++exp;
- lval->op = less_or_equal;
- }
- else
- lval->op = less_than;
- result = CMPOP2;
- break;
-
- case '>':
- if (exp[0] == '=')
- {
- ++exp;
- lval->op = greater_or_equal;
- }
- else
- lval->op = greater_than;
- result = CMPOP2;
- break;
-
- case '*':
- lval->op = mult;
- result = MULOP2;
- break;
-
- case '/':
- lval->op = divide;
- result = MULOP2;
- break;
-
- case '%':
- lval->op = module;
- result = MULOP2;
- break;
-
- case '+':
- lval->op = plus;
- result = ADDOP2;
- break;
-
- case '-':
- lval->op = minus;
- result = ADDOP2;
- break;
-
- case 'n':
- case '?':
- case ':':
- case '(':
- case ')':
- /* Nothing, just return the character. */
- break;
-
- case ';':
- case '\n':
- case '\0':
- /* Be safe and let the user call this function again. */
- --exp;
- result = YYEOF;
- break;
-
- default:
- result = YYERRCODE;
-#if YYDEBUG != 0
- --exp;
-#endif
- break;
- }
-
- *pexp = exp;
-
- return result;
-}
-
-
-static void
-yyerror (const char *str)
-{
- /* Do nothing. We don't print error messages here. */
-}
projects / apps / madmutt.git / blobdiff