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yacc.c: fix warnings about integral types

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Reported by Derek Clegg.
http://lists.gnu.org/archive/html/bug-bison/2018-10/msg00018.html

Rather than adding casts, we should be more careful with types.  For
instance yystate should be a yytype_int16.  But currently we can't: it
is also used sometimes for storing other things that state numbers.

* data/yacc.c (yyparse): Add missing casts.
This commit is contained in:
Akim Demaille
2018-10-22 14:30:41 +02:00
parent ae1e65a285
commit 7a45fc35bf
2 changed files with 18 additions and 9 deletions
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10
TODO
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@@ -1,10 +1,20 @@
* Short term * Short term
** yacc.c
Now that ylwrap is fixed, we should include foo.tab.h from foo.tab.c rather
than duplicating it.
** C++ ** C++
Move to int everywhere instead of unsigned? stack_size, etc. The parser Move to int everywhere instead of unsigned? stack_size, etc. The parser
itself uses int (for yylen for instance), yet stack is based on size_t. itself uses int (for yylen for instance), yet stack is based on size_t.
Maybe locations should also move to ints. Maybe locations should also move to ints.
** C
Introduce state_type rather than spreading yytype_int16 everywhere?
** glr.c
yyspaceLeft should probably be a pointer diff.
** Graphviz display code thoughts ** Graphviz display code thoughts
The code for the --graph option is over two files: print_graph, and The code for the --graph option is over two files: print_graph, and
graphviz. This is because Bison used to also produce VCG graphs, but since graphviz. This is because Bison used to also produce VCG graphs, but since

17
data/yacc.c
View File

@@ -788,7 +788,7 @@ yy_lac_stack_realloc (YYSIZE_T *yycapacity, YYSIZE_T yyadd,
yytype_int16 **yytop, yytype_int16 *yytop_empty) yytype_int16 **yytop, yytype_int16 *yytop_empty)
{ {
YYSIZE_T yysize_old = YYSIZE_T yysize_old =
*yytop == yytop_empty ? 0 : *yytop - *yybottom + 1; (YYSIZE_T) (*yytop == yytop_empty ? 0 : *yytop - *yybottom + 1);
YYSIZE_T yysize_new = yysize_old + yyadd; YYSIZE_T yysize_new = yysize_old + yyadd;
if (*yycapacity < yysize_new) if (*yycapacity < yysize_new)
{ {
@@ -954,7 +954,7 @@ yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes,
YYDPRINTF ((stderr, " R%d", yyrule - 1)); YYDPRINTF ((stderr, " R%d", yyrule - 1));
if (yyesp != yyes_prev) if (yyesp != yyes_prev)
{ {
YYSIZE_T yysize = yyesp - *yyes + 1; YYSIZE_T yysize = (YYSIZE_T) (yyesp - *yyes + 1);
if (yylen < yysize) if (yylen < yysize)
{ {
yyesp -= yylen; yyesp -= yylen;
@@ -970,7 +970,7 @@ yy_lac (yytype_int16 *yyesa, yytype_int16 **yyes,
yyesp = yyes_prev -= yylen; yyesp = yyes_prev -= yylen;
} }
{ {
int yystate; yytype_int16 yystate;
{ {
const int yylhs = yyr1[yyrule] - YYNTOKENS; const int yylhs = yyr1[yyrule] - YYNTOKENS;
const int yyi = yypgoto[yylhs] + *yyesp; const int yyi = yypgoto[yylhs] + *yyesp;
@@ -1084,7 +1084,7 @@ yytnamerr (char *yyres, const char *yystr)
if (! yyres) if (! yyres)
return yystrlen (yystr); return yystrlen (yystr);
return yystpcpy (yyres, yystr) - yyres; return (YYSIZE_T) (yystpcpy (yyres, yystr) - yyres);
} }
# endif # endif
@@ -1445,12 +1445,12 @@ b4_locations_if([[ yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yyllo
yyssp++; yyssp++;
yysetstate: yysetstate:
*yyssp = yystate; *yyssp = (yytype_int16) yystate;
if (yyss + yystacksize - 1 <= yyssp) if (yyss + yystacksize - 1 <= yyssp)
{ {
/* Get the current used size of the three stacks, in elements. */ /* Get the current used size of the three stacks, in elements. */
YYSIZE_T yysize = yyssp - yyss + 1; YYSIZE_T yysize = (YYSIZE_T) (yyssp - yyss + 1);
#ifdef yyoverflow #ifdef yyoverflow
{ {
@@ -1470,10 +1470,9 @@ b4_locations_if([[ yylsp[0] = ]b4_push_if([b4_pure_if([*])yypushed_loc], [yyllo
&yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([ &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([
&yyls1, yysize * sizeof (*yylsp),])[ &yyls1, yysize * sizeof (*yylsp),])[
&yystacksize); &yystacksize);
]b4_locations_if([
yyls = yyls1;])[
yyss = yyss1; yyss = yyss1;
yyvs = yyvs1; yyvs = yyvs1;]b4_locations_if([
yyls = yyls1;])[
} }
#else /* no yyoverflow */ #else /* no yyoverflow */
# ifndef YYSTACK_RELOCATE # ifndef YYSTACK_RELOCATE