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Prefer signed types for indexes in skeletons

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* NEWS: Mention this.
* data/skeletons/c.m4 (b4_int_type):
Prefer char if it will do, and prefer signed types to unsigned if
either will do.
* data/skeletons/glr.c (yy_reduce_print): No need to
convert rule line to unsigned long.
(yyrecoverSyntaxError): Put action into an int to
avoid GCC warning of using a char subscript.
* data/skeletons/lalr1.cc (yy_lac_check_, yysyntax_error_):
Prefer ptrdiff_t to size_t.
* data/skeletons/yacc.c (b4_int_type):
Prefer signed types to unsigned if either will do.
* data/skeletons/yacc.c (b4_declare_parser_state_variables):
(YYSTACK_RELOCATE, YYCOPY, yy_lac_stack_realloc, yy_lac)
(yytnamerr, yysyntax_error, yyparse): Prefer ptrdiff_t to size_t.
(YYPTRDIFF_T, YYPTRDIFF_MAXIMUM): New macros.
(YYSIZE_T): Fix "! defined YYSIZE_T" typo.
(YYSIZE_MAXIMUM): Take the minimum of PTRDIFF_MAX and SIZE_MAX.
(YYSIZEOF): New macro.
(YYSTACK_GAP_MAXIMUM, YYSTACK_BYTES, YYSTACK_RELOCATE)
(yy_lac_stack_realloc, yyparse): Use it.
(YYCOPY, yy_lac_stack_realloc): Cast to YYSIZE_T to pacify GCC.
(yy_reduce_print): Use int instead of unsigned long when int
will do.
(yy_lac_stack_realloc): Prefer long to unsigned long when
either will do.
* tests/regression.at: Adjust to these changes.
This commit is contained in:
Paul Eggert
2019-10-01 01:28:45 -07:00
committed by Akim Demaille
parent 2ca6b71967
commit 4d9ff272cf
6 changed files with 112 additions and 82 deletions
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14
data/skeletons/c.m4
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@@ -167,16 +167,16 @@ b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal);
# b4_int_type(MIN, MAX)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
# MIN to MAX (included).
# Return a narrow int type able to handle integers ranging from MIN
# to MAX (included) in portable C code. Assume MIN and MAX fall in
# 'int' range.
m4_define([b4_int_type],
[m4_if(b4_ints_in($@, [0], [255]), [1], [unsigned char],
b4_ints_in($@, [-128], [127]), [1], [signed char],
[m4_if(b4_ints_in($@, [0], [127]), [1], [char],
b4_ints_in($@, [-127], [127]), [1], [signed char],
b4_ints_in($@, [0], [255]), [1], [unsigned char],
b4_ints_in($@, [-32767], [32767]), [1], [short],
b4_ints_in($@, [0], [65535]), [1], [unsigned short],
b4_ints_in($@, [-32768], [32767]), [1], [short],
m4_eval([0 <= $1]), [1], [unsigned],
[int])])