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-*- Autoconf -*-
# C M4 Macros for Bison.
# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software
# Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
## ---------------- ##
## Identification. ##
## ---------------- ##
# b4_comment(TEXT)
# ----------------
m4_define([b4_comment], [/* m4_bpatsubst([$1], [
], [
]) */])
# b4_identification
# -----------------
# Depends on individual skeletons to define b4_pure_flag, b4_push_flag, or
# b4_pull_flag if they use the values of the %define variables api.pure or
# api.push_pull.
m4_define([b4_identification],
[[/* Identify Bison output. */
#define YYBISON 1
/* Bison version. */
#define YYBISON_VERSION "]b4_version["
/* Skeleton name. */
#define YYSKELETON_NAME ]b4_skeleton[]m4_ifdef([b4_pure_flag], [[
/* Pure parsers. */
#define YYPURE ]b4_pure_flag])[]m4_ifdef([b4_push_flag], [[
/* Push parsers. */
#define YYPUSH ]b4_push_flag])[]m4_ifdef([b4_pull_flag], [[
/* Pull parsers. */
#define YYPULL ]b4_pull_flag])[
/* Using locations. */
#define YYLSP_NEEDED ]b4_locations_flag[
]])
## ---------------- ##
## Default values. ##
## ---------------- ##
# If the %union is not named, its name is YYSTYPE.
m4_define_default([b4_union_name], [YYSTYPE])
# If the %name-prefix is not given, it is yy.
m4_define_default([b4_prefix], [yy])
## ------------------------ ##
## Pure/impure interfaces. ##
## ------------------------ ##
# b4_user_args
# ------------
m4_define([b4_user_args],
[m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])])
# b4_parse_param
# --------------
# If defined, b4_parse_param arrives double quoted, but below we prefer
# it to be single quoted.
m4_define([b4_parse_param],
b4_parse_param)
# b4_parse_param_for(DECL, FORMAL, BODY)
# ---------------------------------------
# Iterate over the user parameters, binding the declaration to DECL,
# the formal name to FORMAL, and evaluating the BODY.
m4_define([b4_parse_param_for],
[m4_foreach([$1_$2], m4_defn([b4_parse_param]),
[m4_pushdef([$1], m4_unquote(m4_car($1_$2)))dnl
m4_pushdef([$2], m4_shift($1_$2))dnl
$3[]dnl
m4_popdef([$2])dnl
m4_popdef([$1])dnl
])])
# b4_parse_param_use
# ------------------
# `YYUSE' all the parse-params.
m4_define([b4_parse_param_use],
[b4_parse_param_for([Decl], [Formal], [ YYUSE (Formal);
])dnl
])
## ------------ ##
## Data Types. ##
## ------------ ##
# b4_int_type(MIN, MAX)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
# MIN to MAX (included).
m4_define([b4_int_type],
[m4_if(b4_ints_in($@, [0], [255]), [1], [unsigned char],
b4_ints_in($@, [-128], [127]), [1], [signed char],
b4_ints_in($@, [0], [65535]), [1], [unsigned short int],
b4_ints_in($@, [-32768], [32767]), [1], [short int],
m4_eval([0 <= $1]), [1], [unsigned int],
[int])])
# b4_int_type_for(NAME)
# ---------------------
# Return the smallest int type able to handle numbers ranging from
# `NAME_min' to `NAME_max' (included).
m4_define([b4_int_type_for],
[b4_int_type($1_min, $1_max)])
## ---------##
## Values. ##
## ---------##
# b4_null
---------
# Return a null pointer constant. NULL infringes on the user name
# space in C, so use 0 rather than NULL.
m4_define([b4_null], [0])
## ------------------------- ##
## Assigning token numbers. ##
## ------------------------- ##
# b4_token_define(TOKEN-NAME, TOKEN-NUMBER)
# -----------------------------------------
# Output the definition of this token as #define.
m4_define([b4_token_define],
[#define $1 $2
])
# b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
# -------------------------------------------------------
# Output the definition of the tokens (if there are) as #defines.
m4_define([b4_token_defines],
[m4_if([$#$1], [1], [],
[/* Tokens. */
m4_map([b4_token_define], [$@])])
])
# b4_token_enum(TOKEN-NAME, TOKEN-NUMBER)
# ---------------------------------------
# Output the definition of this token as an enum.
m4_define([b4_token_enum],
[$1 = $2])
# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
# -----------------------------------------------------
# Output the definition of the tokens (if there are) as enums.
m4_define([b4_token_enums],
[m4_if([$#$1], [1], [],
[/* Tokens. */
#ifndef YYTOKENTYPE
# define YYTOKENTYPE
/* Put the tokens into the symbol table, so that GDB and other debuggers
know about them. */
enum yytokentype {
m4_map_sep([ b4_token_enum], [,
],
[$@])
};
#endif
])])
# b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
# -------------------------------------------------------------
# Output the definition of the tokens (if there are any) as enums and, if POSIX
# Yacc is enabled, as #defines.
m4_define([b4_token_enums_defines],
[b4_token_enums($@)b4_yacc_if([b4_token_defines($@)], [])
])
## --------------------------------------------- ##
## Defining C functions in both K&R and ANSI-C. ##
## --------------------------------------------- ##
# b4_modern_c
# -----------
# A predicate useful in #if to determine whether C is ancient or modern.
#
# If __STDC__ is defined, the compiler is modern. IBM xlc 7.0 when run
# as 'cc' doesn't define __STDC__ (or __STDC_VERSION__) for pedantic
# reasons, but it defines __C99__FUNC__ so check that as well.
# Microsoft C normally doesn't define these macros, but it defines _MSC_VER.
# Consider a C++ compiler to be modern if it defines __cplusplus.
#
m4_define([b4_c_modern],
[[(defined __STDC__ || defined __C99__FUNC__ \
|| defined __cplusplus || defined _MSC_VER)]])
# b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
# ----------------------------------------------------------
# Declare the function NAME.
m4_define([b4_c_function_def],
[#if b4_c_modern
b4_c_ansi_function_def($@)
#else
$2
$1 (b4_c_knr_formal_names(m4_shift2($@)))
b4_c_knr_formal_decls(m4_shift2($@))
#endif[]dnl
])
# b4_c_ansi_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
# ---------------------------------------------------------------
# Declare the function NAME in ANSI.
m4_define([b4_c_ansi_function_def],
[$2
$1 (b4_c_ansi_formals(m4_shift2($@)))[]dnl
])
# b4_c_ansi_formals([DECL1, NAME1], ...)
# --------------------------------------
# Output the arguments ANSI-C definition.
m4_define([b4_c_ansi_formals],
[m4_if([$#], [0], [void],
[$#$1], [1], [void],
[m4_map_sep([b4_c_ansi_formal], [, ], [$@])])])
m4_define([b4_c_ansi_formal],
[$1])
# b4_c_knr_formal_names([DECL1, NAME1], ...)
# ------------------------------------------
# Output the argument names.
m4_define([b4_c_knr_formal_names],
[m4_map_sep([b4_c_knr_formal_name], [, ], [$@])])
m4_define([b4_c_knr_formal_name],
[$2])
# b4_c_knr_formal_decls([DECL1, NAME1], ...)
# ------------------------------------------
# Output the K&R argument declarations.
m4_define([b4_c_knr_formal_decls],
[m4_map_sep([b4_c_knr_formal_decl],
[
],
[$@])])
m4_define([b4_c_knr_formal_decl],
[ $1;])
## ------------------------------------------------------------ ##
## Declaring (prototyping) C functions in both K&R and ANSI-C. ##
## ------------------------------------------------------------ ##
# b4_c_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
# -----------------------------------------------------------
# Declare the function NAME.
m4_define([b4_c_function_decl],
[#if defined __STDC__ || defined __cplusplus
b4_c_ansi_function_decl($@)
#else
$2 $1 ();
#endif[]dnl
])
# b4_c_ansi_function_decl(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
# ----------------------------------------------------------------
# Declare the function NAME.
m4_define([b4_c_ansi_function_decl],
[$2 $1 (b4_c_ansi_formals(m4_shift2($@)));[]dnl
])
## --------------------- ##
## Calling C functions. ##
## --------------------- ##
# b4_c_function_call(NAME, RETURN-VALUE, [DECL1, NAME1], ...)
# -----------------------------------------------------------
# Call the function NAME with arguments NAME1, NAME2 etc.
m4_define([b4_c_function_call],
[$1 (b4_c_args(m4_shift2($@)))[]dnl
])
# b4_c_args([DECL1, NAME1], ...)
# ------------------------------
# Output the arguments NAME1, NAME2...
m4_define([b4_c_args],
[m4_map_sep([b4_c_arg], [, ], [$@])])
m4_define([b4_c_arg],
[$2])
## ----------- ##
## Synclines. ##
## ----------- ##
# b4_sync_start(LINE, FILE)
# -----------------------
m4_define([b4_sync_start], [[#]line $1 $2])
## -------------- ##
## User actions. ##
## -------------- ##
# b4_case(LABEL, STATEMENTS)
# --------------------------
m4_define([b4_case],
[ case $1:
$2
break;])
# b4_symbol_actions(FILENAME, LINENO,
# SYMBOL-TAG, SYMBOL-NUM,
# SYMBOL-ACTION, SYMBOL-TYPENAME)
# -------------------------------------------------
m4_define([b4_symbol_actions],
[m4_pushdef([b4_dollar_dollar],
[m4_ifval([$6], [(yyvaluep->$6)], [(*yyvaluep)])])dnl
m4_pushdef([b4_at_dollar], [(*yylocationp)])dnl
case $4: /* $3 */
b4_syncline([$2], [$1])
$5;
b4_syncline([@oline@], [@ofile@])
break;
m4_popdef([b4_at_dollar])dnl
m4_popdef([b4_dollar_dollar])dnl
])
# b4_yydestruct_generate(FUNCTION-DECLARATOR)
# -------------------------------------------
# Generate the "yydestruct" function, which declaration is issued using
# FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
# or "b4_c_function_def" for K&R.
m4_define_default([b4_yydestruct_generate],
[[/*-----------------------------------------------.
| Release the memory associated to this symbol. |
`-----------------------------------------------*/
/*ARGSUSED*/
]$1([yydestruct],
[static void],
[[const char *yymsg], [yymsg]],
[[int yytype], [yytype]],
[[YYSTYPE *yyvaluep], [yyvaluep]][]dnl
b4_locations_if( [, [[YYLTYPE *yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
YYUSE (yyvaluep);
]b4_locations_if([ YYUSE (yylocationp);
])dnl
b4_parse_param_use[]dnl
[
if (!yymsg)
yymsg = "Deleting";
YY_SYMBOL_PRINT (yymsg, yytype, yyvaluep, yylocationp);
switch (yytype)
{
]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
default:
break;
}
}]dnl
])
# b4_yy_symbol_print_generate(FUNCTION-DECLARATOR)
# ------------------------------------------------
# Generate the "yy_symbol_print" function, which declaration is issued using
# FUNCTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
# or "b4_c_function_def" for K&R.
m4_define_default([b4_yy_symbol_print_generate],
[[
/*--------------------------------.
| Print this symbol on YYOUTPUT. |
`--------------------------------*/
/*ARGSUSED*/
]$1([yy_symbol_value_print],
[static void],
[[FILE *yyoutput], [yyoutput]],
[[int yytype], [yytype]],
[[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
if (!yyvaluep)
return;
]b4_locations_if([ YYUSE (yylocationp);
])dnl
b4_parse_param_use[]dnl
[# ifdef YYPRINT
if (yytype < YYNTOKENS)
YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
# else
YYUSE (yyoutput);
# endif
switch (yytype)
{
]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
[ default:
break;
}
}
/*--------------------------------.
| Print this symbol on YYOUTPUT. |
`--------------------------------*/
]$1([yy_symbol_print],
[static void],
[[FILE *yyoutput], [yyoutput]],
[[int yytype], [yytype]],
[[YYSTYPE const * const yyvaluep], [yyvaluep]][]dnl
b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
m4_ifset([b4_parse_param], [, b4_parse_param]))[
{
if (yytype < YYNTOKENS)
YYFPRINTF (yyoutput, "token %s (", yytname[yytype]);
else
YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]);
]b4_locations_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp);
YYFPRINTF (yyoutput, ": ");
])dnl
[ yy_symbol_value_print (yyoutput, yytype, yyvaluep]dnl
b4_locations_if([, yylocationp])[]b4_user_args[);
YYFPRINTF (yyoutput, ")");
}]dnl
])
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