X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/fb8135fa993b77b8cfc0ff652b02424aea3c6754..e62f1a899168bdf1658dd6d934dea407491a80ff:/data/c.m4?ds=inline diff --git a/data/c.m4 b/data/c.m4 index 969edf78..79ce9767 100644 --- a/data/c.m4 +++ b/data/c.m4 @@ -1,7 +1,7 @@ -m4_divert(-1) -*- C -*- +m4_divert(-1) -*- Autoconf -*- # C M4 Macros for Bison. -# Copyright (C) 2002 Free Software Foundation, Inc. +# Copyright (C) 2002, 2004 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 @@ -19,17 +19,17 @@ m4_divert(-1) -*- C -*- # 02111-1307 USA -## ----------- ## -## Copuright. ## -## ----------- ## +## ---------------- ## +## Identification. ## +## ---------------- ## # b4_copyright(TITLE, YEARS) # -------------------------- m4_define([b4_copyright], -[/* A Bison parser, made from b4_filename, by GNU bison b4_version. */ +[/* A Bison parser, made by GNU Bison b4_version. */ /* $1, - Copyright $2 Free Software Foundation, Inc. + 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 @@ -44,34 +44,113 @@ m4_define([b4_copyright], 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., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ + Boston, MA 02111-1307, USA. */]) + + +# b4_identification +# ----------------- +m4_define([b4_identification], +[/* Identify Bison output. */ +[#]define YYBISON 1 + +/* 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)) -/* As a special exception, when this file is copied by Bison into a - Bison output file, you may use that output file without restriction. - This special exception was added by the Free Software Foundation - in version 1.24 of Bison. */]) ## ------------ ## ## Data Types. ## ## ------------ ## -# b4_sint_type(MAX) -# ----------------- -# Return the smallest signed int type able to handle the number MAX. -m4_define([b4_sint_type], -[m4_if(m4_eval([$1 <= 127]), [1], [signed char], - m4_eval([$1 <= 32767]), [1], [signed short], - [signed int])]) +# 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_uint_type(MAX) -# ----------------- -# Return the smallest unsigned int type able to handle the number MAX. -m4_define([b4_uint_type], -[m4_if(m4_eval([$1 <= 255]), [1], [unsigned char], - m4_eval([$1 <= 65535]), [1], [unsigned short], - [unsigned int])]) + +# b4_int_type(MIN, MAX) +# --------------------- +# Return the smallest int type able to handle numbers ranging from +# MIN to MAX (included). +m4_define([b4_int_type], +[m4_if(b4_ints_in($@, [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], + [$2])]) @@ -101,7 +180,7 @@ m4_define([b4_token_defines], [m4_if([$@], [[]], [], [/* Tokens. */ #ifndef YYTOKENTYPE -# if defined (__STDC__) || defined (__cplusplus) +# define YYTOKENTYPE /* Put the tokens into the symbol table, so that GDB and other debuggers know about them. */ enum yytokentype { @@ -109,10 +188,234 @@ m4_map_sep([ b4_token_enum], [, ], [$@]) }; -# endif - /* POSIX requires `int' for tokens in interfaces. */ -# define YYTOKENTYPE int -#endif /* !YYTOKENTYPE */ +#endif m4_map([b4_token_define], [$@]) ]) ]) + + + +## --------------------------------------------- ## +## 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([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([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); + fprintf (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, ")"); +} +]])