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* data/push.c (yypushparse): Fix memory leak if yymsg is malloced

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in a push parser.  Reindent slightly to match yacc.c better.

2006-10-11  Bob Rossi  <bob@brasko.net>

        * data/push.c (struct yypvars): Remove yymsgbuf, yymsgbuf_ptr, yymsg,
        yymsg_alloc fields.
        (yypvarsinit, yypushparse): Remove init of removed fields.
        (yypushparse): Use yymsgbuf instead of yymsgbuf_ptr.
This commit is contained in:
Paul Eggert
2006-10-11 16:35:34 +00:00
parent c1630a8b80
commit 96a1981a77
2 changed files with 24 additions and 36 deletions
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48
data/push.c
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@@ -1017,14 +1017,6 @@ m4_define([b4_declare_yyparse_variables],
/* Look-ahead token as an internal (translated) token number. */
int yytoken;
#if YYERROR_VERBOSE
/* Buffer for error messages, and its allocated size. */
char yymsgbuf[128];
char *yymsgbuf_ptr;
char *yymsg;
YYSIZE_T yymsg_alloc;
#endif
/* Three stacks and their tools:
`yyss': related to states,
`yyvs': related to semantic values,
@@ -1070,12 +1062,6 @@ yypvarsinit (void)
pv->yyerrstatus = 0;
pv->yytoken = 0;
#if YYERROR_VERBOSE
pv->yymsgbuf_ptr = pv->yymsgbuf;
pv->yymsg = pv->yymsgbuf;
pv->yymsg_alloc = sizeof pv->yymsgbuf;
#endif
pv->yyssa_ptr = pv->yyssa;
pv->yyss = pv->yyssa;
pv->yyvs = pv->yyvsa;
@@ -1153,7 +1139,6 @@ b4_c_function_def([yyparse], [int], b4_parse_param)
#if YYERROR_VERBOSE
/* Buffer for error messages, and its allocated size. */
char yymsgbuf[128];
char *yymsgbuf_ptr = yymsgbuf;
char *yymsg = yymsgbuf;
YYSIZE_T yymsg_alloc = sizeof yymsgbuf;
#endif
@@ -1248,11 +1233,7 @@ m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc;
yyresult = pv->yyresult;
yyerrstatus = pv->yyerrstatus;
yytoken = pv->yytoken;
#if YYERROR_VERBOSE
yymsgbuf_ptr = pv->yymsgbuf_ptr;
yymsg = pv->yymsg;;
yymsg_alloc = pv->yymsg_alloc;
#endif
yyssa_ptr = pv->yyssa_ptr;
yyss = pv->yyss;
yyssp = pv->yyssp;
@@ -1390,14 +1371,9 @@ yybackup:
pv->yystate = yystate;
pv->yyn = yyn;
pv->yyresult = yyresult;
pv->yyerrstatus = yyerrstatus;
pv->yytoken = yytoken;
#if YYERROR_VERBOSE
pv->yymsgbuf_ptr = yymsgbuf_ptr;
pv->yymsg = yymsg;;
pv->yymsg_alloc = yymsg_alloc;
#endif
pv->yyssa_ptr = yyssa_ptr;
pv->yyss = yyss;
pv->yyssp = yyssp;
@@ -1414,11 +1390,10 @@ yybackup:
pv->yylen = yylen;
pv->yyval = yyval;
]b4_locations_if([pv->yyloc = yyloc;])[
return yyresult;
gottoken:
YYDPRINTF((stderr, "Reading a token: "));],[
YYDPRINTF ((stderr, "Reading a token: "));
yychar = YYLEX;])[
goto yypushreturn;
gottoken:])
YYDPRINTF ((stderr, "Reading a token: "));
]b4_push_if([], [yychar = YYLEX;])[
}
if (yychar <= YYEOF)
@@ -1541,14 +1516,14 @@ yyerrlab:
YYSIZE_T yyalloc = 2 * yysize;
if (! (yysize <= yyalloc && yyalloc <= YYSTACK_ALLOC_MAXIMUM))
yyalloc = YYSTACK_ALLOC_MAXIMUM;
if (yymsg != yymsgbuf_ptr)
if (yymsg != yymsgbuf)
YYSTACK_FREE (yymsg);
yymsg = (char *) YYSTACK_ALLOC (yyalloc);
if (yymsg)
yymsg_alloc = yyalloc;
else
{
yymsg = yymsgbuf_ptr;
yymsg = yymsgbuf;
yymsg_alloc = sizeof yymsgbuf;
}
}
@@ -1704,13 +1679,14 @@ yyreturn:
if (yyss != yyssa_ptr)
YYSTACK_FREE (yyss);
#endif
]b4_push_if([yypushreturn:])[
#if YYERROR_VERBOSE
if (yymsg != yymsgbuf_ptr)
if (yymsg != yymsgbuf)
YYSTACK_FREE (yymsg);
#endif
]b4_push_if([pv->yyresult = YYID (yyresult);])[
/* Make sure YYID is used. */
return YYID (yyresult);
/* Make sure YYID is used. */
return YYID (yyresult);
]}
b4_push_if([