-*- Autoconf -*- # C M4 Macros for Bison. # Copyright (C) 2002, 2004-2012 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 . m4_include(b4_pkgdatadir/[c-like.m4]) # b4_tocpp(STRING) # ---------------- # Convert STRING into a valid C macro name. m4_define([b4_tocpp], [m4_toupper(m4_bpatsubst(m4_quote($1), [[^a-zA-Z0-9]+], [_]))]) # b4_cpp_guard(FILE) # ------------------ # A valid C macro name to use as a CPP header guard for FILE. m4_define([b4_cpp_guard], [[YY_]b4_tocpp(m4_defn([b4_prefix])/[$1])[_INCLUDED]]) # b4_cpp_guard_open(FILE) # b4_cpp_guard_close(FILE) # ------------------------ # If FILE does not expand to nothing, open/close CPP inclusion guards for FILE. m4_define([b4_cpp_guard_open], [m4_ifval(m4_quote($1), [#ifndef b4_cpp_guard([$1]) # define b4_cpp_guard([$1])])]) m4_define([b4_cpp_guard_close], [m4_ifval(m4_quote($1), [#endif b4_comment([!b4_cpp_guard([$1])])])]) ## ---------------- ## ## 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])[ ]]) ## ---------------- ## ## Default values. ## ## ---------------- ## # b4_api_prefix, b4_api_PREFIX # ---------------------------- # Corresponds to %define api.prefix b4_percent_define_default([[api.prefix]], [[yy]]) m4_define([b4_api_prefix], [b4_percent_define_get([[api.prefix]])]) m4_define([b4_api_PREFIX], [m4_toupper(b4_api_prefix)]) # b4_prefix # --------- # If the %name-prefix is not given, it is api.prefix. m4_define_default([b4_prefix], [b4_api_prefix]) # If the %union is not named, its name is YYSTYPE. m4_define_default([b4_union_name], [b4_api_PREFIX[]STYPE]) ## ------------------------ ## ## 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)]) # b4_table_value_equals(TABLE, VALUE, LITERAL) # -------------------------------------------- # Without inducing a comparison warning from the compiler, check if the # literal value LITERAL equals VALUE from table TABLE, which must have # TABLE_min and TABLE_max defined. YYID must be defined as an identity # function that suppresses warnings about constant conditions. m4_define([b4_table_value_equals], [m4_if(m4_eval($3 < m4_indir([b4_]$1[_min]) || m4_indir([b4_]$1[_max]) < $3), [1], [[YYID (0)]], [(!!(($2) == ($3)))])]) ## ---------## ## Values. ## ## ---------## # b4_null_define # -------------- # Portability issues: define a YY_NULL appropriate for the current # language (C, C++98, or C++11). m4_define([b4_null_define], [# ifndef YY_NULL # if defined __cplusplus && 201103L <= __cplusplus # define YY_NULL nullptr # else # define YY_NULL 0 # endif # endif[]dnl ]) # b4_null # ------- # Return a null pointer constant. m4_define([b4_null], [YY_NULL]) ## ------------------------- ## ## 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 = $2]) # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) # ----------------------------------------------------- # Output the definition of the tokens (if there are) as enums. m4_define([b4_token_enums], [m4_if([$#$1], [1], [], [[/* Tokens. */ #ifndef ]b4_api_PREFIX[TOKENTYPE # define ]b4_api_PREFIX[TOKENTYPE /* Put the tokens into the symbol table, so that GDB and other debuggers know about them. */ enum ]b4_api_prefix[tokentype { ]m4_map_sep([ b4_token_enum], [, ], [$@])[ }; #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) # ------------------------------------------------- # Issue the code for a symbol action (e.g., %printer). # # Define b4_dollar_dollar([TYPE-NAME]), and b4_at_dollar, which are # invoked where $$ and @$ were specified by the user. m4_define([b4_symbol_actions], [b4_dollar_pushdef([(*yyvaluep)], [$6], [(*yylocationp)])dnl case $4: /* $3 */ b4_syncline([$2], [$1]) $5; b4_syncline([@oline@], [@ofile@]) break; b4_dollar_popdef[]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]))[ { FILE *yyo = yyoutput; YYUSE (yyo); 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 ]) ## -------------- ## ## Declarations. ## ## -------------- ## # b4_declare_yylstype # ------------------- # Declarations that might either go into the header (if --defines) or # in the parser body. Declare YYSTYPE/YYLTYPE, and yylval/yylloc. m4_define([b4_declare_yylstype], [[#if ! defined ]b4_api_PREFIX[STYPE && ! defined ]b4_api_PREFIX[STYPE_IS_DECLARED ]m4_ifdef([b4_stype], [[typedef union ]b4_union_name[ { ]b4_user_stype[ } ]b4_api_PREFIX[STYPE; # define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1]], [m4_if(b4_tag_seen_flag, 0, [[typedef int ]b4_api_PREFIX[STYPE; # define ]b4_api_PREFIX[STYPE_IS_TRIVIAL 1]])])[ # define ]b4_api_prefix[stype ]b4_api_PREFIX[STYPE /* obsolescent; will be withdrawn */ # define ]b4_api_PREFIX[STYPE_IS_DECLARED 1 #endif]b4_locations_if([[ #if ! defined ]b4_api_PREFIX[LTYPE && ! defined ]b4_api_PREFIX[LTYPE_IS_DECLARED typedef struct ]b4_api_PREFIX[LTYPE { int first_line; int first_column; int last_line; int last_column; } ]b4_api_PREFIX[LTYPE; # define ]b4_api_prefix[ltype ]b4_api_PREFIX[LTYPE /* obsolescent; will be withdrawn */ # define ]b4_api_PREFIX[LTYPE_IS_DECLARED 1 # define ]b4_api_PREFIX[LTYPE_IS_TRIVIAL 1 #endif]]) b4_pure_if([], [[extern ]b4_api_PREFIX[STYPE ]b4_prefix[lval; ]b4_locations_if([[extern ]b4_api_PREFIX[LTYPE ]b4_prefix[lloc;]])])[]dnl ]) # b4_YYDEBUG_define # ------------------ m4_define([b4_YYDEBUG_define], [[/* Enabling traces. */ ]m4_if(b4_api_prefix, [yy], [[#ifndef YYDEBUG # define YYDEBUG ]b4_debug_flag[ #endif]], [[#ifndef ]b4_api_PREFIX[DEBUG # if defined YYDEBUG # if YYDEBUG # define ]b4_api_PREFIX[DEBUG 1 # else # define ]b4_api_PREFIX[DEBUG 0 # endif # else /* ! defined YYDEBUG */ # define ]b4_api_PREFIX[DEBUG ]b4_debug_flag[ # endif /* ! defined YYDEBUG */ #endif /* ! defined ]b4_api_PREFIX[DEBUG */]])[]dnl ]) # b4_declare_yydebug # ------------------ m4_define([b4_declare_yydebug], [b4_YYDEBUG_define[ #if ]b4_api_PREFIX[DEBUG extern int ]b4_prefix[debug; #endif][]dnl ]) # b4_yylloc_default_define # ------------------------ # Define YYLLOC_DEFAULT. m4_define([b4_yylloc_default_define], [[/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N]. If N is 0, then set CURRENT to the empty location which ends the previous symbol: RHS[0] (always defined). */ #ifndef YYLLOC_DEFAULT # define YYLLOC_DEFAULT(Current, Rhs, N) \ do \ if (YYID (N)) \ { \ (Current).first_line = YYRHSLOC (Rhs, 1).first_line; \ (Current).first_column = YYRHSLOC (Rhs, 1).first_column; \ (Current).last_line = YYRHSLOC (Rhs, N).last_line; \ (Current).last_column = YYRHSLOC (Rhs, N).last_column; \ } \ else \ { \ (Current).first_line = (Current).last_line = \ YYRHSLOC (Rhs, 0).last_line; \ (Current).first_column = (Current).last_column = \ YYRHSLOC (Rhs, 0).last_column; \ } \ while (YYID (0)) #endif ]]) # b4_yyloc_default_define # ------------------------ # Define yyloc_default, which can be used to initialize location # variables. m4_define([b4_yyloc_default_define], [[static YYLTYPE yyloc_default # if defined ]b4_api_PREFIX[LTYPE_IS_TRIVIAL && ]b4_api_PREFIX[LTYPE_IS_TRIVIAL = { ]m4_join([, ], m4_defn([b4_location_initial_line]), m4_defn([b4_location_initial_column]), m4_defn([b4_location_initial_line]), m4_defn([b4_location_initial_column]))[ } # endif ;]dnl ])