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portability: fix pointer arithmetic to conform to C standard.

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Reported by Tys Lefering at
<http://lists.gnu.org/archive/html/bug-bison/2010-03/msg00035.html>.
This fix is already implemented in glr.c and does not apply to
lalr1.java.
* data/lalr1.cc (yy::parser::parse): Increase size of
yyerror_range and adjust subscripting so you don't have to
subtract one from the beginning of the array.
* data/yacc.c (b4_declare_parser_state_variables,
yyparse, yypush_parse): Likewise.
This commit is contained in:
Joel E. Denny
2010-04-03 14:58:22 -04:00
parent 18493762be
commit 48f4100a82
5 changed files with 34 additions and 21 deletions
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12
data/lalr1.cc
View File

@@ -538,7 +538,7 @@ do { \
/// Location of the lookahead.
location_type yylloc;
/// The locations where the error started and ended.
location_type yyerror_range[2];
location_type yyerror_range[3];
/// $$.
semantic_type yyval;
@@ -709,7 +709,7 @@ m4_ifdef([b4_lex_param], [, ]b4_lex_param))[;
b4_error_verbose_if([, yytoken])[));
}
yyerror_range[0] = yylloc;
yyerror_range[1] = yylloc;
if (yyerrstatus_ == 3)
{
/* If just tried and failed to reuse lookahead token after an
@@ -744,7 +744,7 @@ b4_error_verbose_if([, yytoken])[));
if (false)
goto yyerrorlab;
yyerror_range[0] = yylocation_stack_[yylen - 1];
yyerror_range[1] = yylocation_stack_[yylen - 1];
/* Do not reclaim the symbols of the rule which action triggered
this YYERROR. */
yypop_ (yylen);
@@ -776,7 +776,7 @@ b4_error_verbose_if([, yytoken])[));
if (yystate_stack_.height () == 1)
YYABORT;
yyerror_range[0] = yylocation_stack_[0];
yyerror_range[1] = yylocation_stack_[0];
yydestruct_ ("Error: popping",
yystos_[yystate],
&yysemantic_stack_[0], &yylocation_stack_[0]);
@@ -785,10 +785,10 @@ b4_error_verbose_if([, yytoken])[));
YY_STACK_PRINT ();
}
yyerror_range[1] = yylloc;
yyerror_range[2] = yylloc;
// Using YYLLOC is tempting, but would change the location of
// the lookahead. YYLOC is available though.
YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
yysemantic_stack_.push (yylval);
yylocation_stack_.push (yyloc);

12
data/yacc.c
View File

@@ -1072,7 +1072,7 @@ m4_define([b4_declare_parser_state_variables],
YYLTYPE *yylsp;
/* The locations where the error started and ended. */
YYLTYPE yyerror_range[2];
YYLTYPE yyerror_range[3];
]])[
YYSIZE_T yystacksize;
]])
@@ -1533,7 +1533,7 @@ yyerrlab:
#endif
}
]b4_locations_if([[ yyerror_range[0] = yylloc;]])[
]b4_locations_if([[ yyerror_range[1] = yylloc;]])[
if (yyerrstatus == 3)
{
@@ -1570,7 +1570,7 @@ yyerrorlab:
if (/*CONSTCOND*/ 0)
goto yyerrorlab;
]b4_locations_if([[ yyerror_range[0] = yylsp[1-yylen];
]b4_locations_if([[ yyerror_range[1] = yylsp[1-yylen];
]])[ /* Do not reclaim the symbols of the rule which action triggered
this YYERROR. */
YYPOPSTACK (yylen);
@@ -1604,7 +1604,7 @@ yyerrlab1:
if (yyssp == yyss)
YYABORT;
]b4_locations_if([[ yyerror_range[0] = *yylsp;]])[
]b4_locations_if([[ yyerror_range[1] = *yylsp;]])[
yydestruct ("Error: popping",
yystos[yystate], yyvsp]b4_locations_if([, yylsp])[]b4_user_args[);
YYPOPSTACK (1);
@@ -1614,10 +1614,10 @@ yyerrlab1:
*++yyvsp = yylval;
]b4_locations_if([[
yyerror_range[1] = yylloc;
yyerror_range[2] = yylloc;
/* Using YYLLOC is tempting, but would change the location of
the lookahead. YYLOC is available though. */
YYLLOC_DEFAULT (yyloc, (yyerror_range - 1), 2);
YYLLOC_DEFAULT (yyloc, yyerror_range, 2);
*++yylsp = yyloc;]])[
/* Shift the error token. */