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m4_divert(-1) -*- Autoconf -*- # C M4 Macros for Bison. # Copyright (C) 2002, 2004, 2005 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 2 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, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301 USA ## ---------------- ## ## Identification. ## ## ---------------- ## # b4_copyright(TITLE, YEARS) # -------------------------- m4_define([b4_copyright], [/* A Bison parser, made by GNU Bison b4_version. */ /* $1, Copyright (C) $2 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 2, 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */]) # b4_identification # ----------------- m4_define([b4_identification], [/* Identify Bison output. */ [#]define YYBISON 1 /* Bison version. */ [#]define YYBISON_VERSION "b4_version" /* Skeleton name. */ [#]define YYSKELETON_NAME b4_skeleton /* Pure parsers. */ [#]define YYPURE b4_pure /* Using locations. */ [#]define YYLSP_NEEDED b4_locations_flag ]) ## ---------------- ## ## Default values. ## ## ---------------- ## m4_define_default([b4_epilogue], []) ## ------------------------ ## ## 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_default([b4_parse_param]) m4_define([b4_parse_param], b4_parse_param)) ## ------------ ## ## Data Types. ## ## ------------ ## # b4_ints_in(INT1, INT2, LOW, HIGH) # --------------------------------- # Return 1 iff both INT1 and INT2 are in [LOW, HIGH], 0 otherwise. m4_define([b4_ints_in], [m4_eval([$3 <= $1 && $1 <= $4 && $3 <= $2 && $2 <= $4])]) # b4_int_type(MIN, MAX) # --------------------- # Return the smallest int type able to handle numbers ranging from # MIN to MAX (included). m4_define([b4_int_type], [m4_if(b4_ints_in($@, [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)]) ## ------------------ ## ## Decoding options. ## ## ------------------ ## # b4_location_if(IF-TRUE, IF-FALSE) # --------------------------------- # Expand IF-TRUE, if locations are used, IF-FALSE otherwise. m4_define([b4_location_if], [m4_if(b4_locations_flag, [1], [$1], [$2])]) # b4_pure_if(IF-TRUE, IF-FALSE) # ----------------------------- # Expand IF-TRUE, if %pure-parser, IF-FALSE otherwise. m4_define([b4_pure_if], [m4_if(b4_pure, [1], [$1], [$2])]) ## ------------------------- ## ## 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 $2 ]) # b4_token_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) # ------------------------------------------------------- # Output the definition of the tokens (if there are) as #defines. m4_define([b4_token_defines], [m4_if([$@], [[]], [], [/* 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 = $2]) # b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) # ----------------------------------------------------- # Output the definition of the tokens (if there are) as enums. m4_define([b4_token_enums], [m4_if([$@], [[]], [], [/* 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], [, ], [$@]) }; #endif ])]) # b4_token_enums_defines(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER) # ------------------------------------------------------------- # Output the definition of the tokens (if there are) as enums and #defines. m4_define([b4_token_enums_defines], [b4_token_enums($@)b4_token_defines($@) ]) ## --------------------------------------------- ## ## Defining C functions in both K&R and ANSI-C. ## ## --------------------------------------------- ## # b4_c_function_def(NAME, RETURN-VALUE, [DECL1, NAME1], ...) # ---------------------------------------------------------- # Declare the function NAME. m4_define([b4_c_function_def], [#if defined (__STDC__) || defined (__cplusplus) b4_c_ansi_function_def($@) #else $2 $1 (b4_c_knr_formal_names(m4_shiftn(2, $@))) b4_c_knr_formal_decls(m4_shiftn(2, $@)) #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_shiftn(2, $@)))[]dnl ]) # b4_c_ansi_formals([DECL1, NAME1], ...) # -------------------------------------- # Output the arguments ANSI-C definition. m4_define([b4_c_ansi_formals], [m4_case([$@], [], [void], [[]], [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_shiftn(2, $@)));[]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_shiftn(2, $@)))[]dnl ]) # b4_c_args([DECL1, NAME1], ...) # ------------------------------ # Output the arguments NAME1, NAME2... m4_define([b4_c_args], [m4_map_sep([b4_c_arg], [, ], [$@])]) m4_define([b4_c_arg], [$2]) ## ----------- ## ## Synclines. ## ## ----------- ## # b4_syncline(LINE, FILE) # ----------------------- m4_define([b4_syncline], [m4_if(b4_synclines_flag, 1, [[#]line $1 $2])]) # 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. | `-----------------------------------------------*/ ]$1([yydestruct], [static void], [[const char *yymsg], [yymsg]], [[int yytype], [yytype]], [[YYSTYPE *yyvaluep], [yyvaluep]]b4_location_if([, [[YYLTYPE *yylocationp], [yylocationp]]]))[ { /* Pacify ``unused variable'' warnings. */ (void) yyvaluep; ]b4_location_if([ (void) yylocationp; ])[ 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_yysymprint_generate(FUNCTION-DECLARATOR) # ------------------------------------------- # Generate the "yysymprint" 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_yysymprint_generate], [[/*--------------------------------. | Print this symbol on YYOUTPUT. | `--------------------------------*/ ]$1([yysymprint], [static void], [[FILE *yyoutput], [yyoutput]], [[int yytype], [yytype]], [[YYSTYPE *yyvaluep], [yyvaluep]]b4_location_if([, [[YYLTYPE *yylocationp], [yylocationp]]])) { /* Pacify ``unused variable'' warnings. */ (void) yyvaluep; b4_location_if([ (void) yylocationp; ])dnl [ if (yytype < YYNTOKENS) YYFPRINTF (yyoutput, "token %s (", yytname[yytype]); else YYFPRINTF (yyoutput, "nterm %s (", yytname[yytype]); ]b4_location_if([ YY_LOCATION_PRINT (yyoutput, *yylocationp); YYFPRINTF (yyoutput, ": "); ])dnl [ # ifdef YYPRINT if (yytype < YYNTOKENS) YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep); # endif switch (yytype) { ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl [ default: break; } YYFPRINTF (yyoutput, ")"); } ]])