X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/34f98f46ee16dd3719d19e002dc27b2665a2514f..d88cf117910f0023d3a0f53c2380aec40a748c3d:/data/yacc.c diff --git a/data/yacc.c b/data/yacc.c index 357588ce..53e99f54 100644 --- a/data/yacc.c +++ b/data/yacc.c @@ -1,24 +1,40 @@ -m4_divert(-1) -*- C -*- + -*- C -*- # Yacc compatible skeleton for Bison -# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006 -# Free Software Foundation, Inc. +# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006, +# 2007, 2008, 2009 Free Software Foundation, Inc. -# This program is free software; you can redistribute it and/or modify +# 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 +# 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, write to the Free Software -# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -# 02110-1301 USA +# along with this program. If not, see . + +# Check the value of %define api.push-pull. +b4_percent_define_default([[api.push-pull]], [[pull]]) +b4_percent_define_check_values([[[[api.push-pull]], + [[pull]], [[push]], [[both]]]]) +b4_define_flag_if([pull]) m4_define([b4_pull_flag], [[1]]) +b4_define_flag_if([push]) m4_define([b4_push_flag], [[1]]) +m4_case(b4_percent_define_get([[api.push-pull]]), + [pull], [m4_define([b4_push_flag], [[0]])], + [push], [m4_define([b4_pull_flag], [[0]])]) + +# Handle BISON_USE_PUSH_FOR_PULL for the test suite. So that push parsing +# tests function as written, don't let BISON_USE_PUSH_FOR_PULL modify Bison's +# behavior at all when push parsing is already requested. +b4_define_flag_if([use_push_for_pull]) +b4_use_push_for_pull_if([ + b4_push_if([m4_define([b4_use_push_for_pull_flag], [[0]])], + [m4_define([b4_push_flag], [[1]])])]) m4_include(b4_pkgdatadir/[c.m4]) @@ -35,6 +51,10 @@ m4_define_default([b4_stack_depth_init], [200]) ## Pure/impure interfaces. ## ## ------------------------ ## +b4_percent_define_default([[api.pure]], [[false]]) +b4_define_flag_if([pure]) +m4_define([b4_pure_flag], + [b4_percent_define_flag_if([[api.pure]], [[1]], [[0]])]) # b4_yacc_pure_if(IF-TRUE, IF-FALSE) # ---------------------------------- @@ -63,7 +83,6 @@ b4_locations_if([, [[YYLTYPE *], [&yylloc]]])m4_ifdef([b4_lex_param], [, ])])dnl m4_ifdef([b4_lex_param], b4_lex_param))) - ## ------------ ## ## Data Types. ## ## ------------ ## @@ -126,6 +145,68 @@ m4_define([b4_rhs_location], [(yylsp@{($2) - ($1)@})]) +## ------------------ ## +## Parser variables. ## +## ------------------ ## + +# b4_declare_scanner_communication_variables +# ------------------------------------------ +# Declare the variables that are global, or local to YYPARSE if +# pure-parser. +m4_define([b4_declare_scanner_communication_variables], [[ +/* The lookahead symbol. */ +int yychar; + +/* The semantic value of the lookahead symbol. */ +YYSTYPE yylval;]b4_locations_if([[ + +/* Location data for the lookahead symbol. */ +YYLTYPE yylloc;]])b4_pure_if([], [[ + +/* Number of syntax errors so far. */ +int yynerrs;]])]) + + +# b4_declare_parser_state_variables +# --------------------------------- +# Declare all the variables that are needed to maintain the parser state +# between calls to yypush_parse. +m4_define([b4_declare_parser_state_variables], [b4_pure_if([[ + /* Number of syntax errors so far. */ + int yynerrs; +]])[ + int yystate; + /* Number of tokens to shift before error messages enabled. */ + int yyerrstatus; + + /* The stacks and their tools: + `yyss': related to states. + `yyvs': related to semantic values.]b4_locations_if([[ + `yyls': related to locations.]])[ + + Refer to the stacks thru separate pointers, to allow yyoverflow + to reallocate them elsewhere. */ + + /* The state stack. */ + yytype_int16 yyssa[YYINITDEPTH]; + yytype_int16 *yyss; + yytype_int16 *yyssp; + + /* The semantic value stack. */ + YYSTYPE yyvsa[YYINITDEPTH]; + YYSTYPE *yyvs; + YYSTYPE *yyvsp;]b4_locations_if([[ + + /* The location stack. */ + YYLTYPE yylsa[YYINITDEPTH]; + YYLTYPE *yyls; + YYLTYPE *yylsp; + + /* The locations where the error started and ended. */ + YYLTYPE yyerror_range[2];]])[ + + YYSIZE_T yystacksize;]]) + ## --------------------------------------------------------- ## ## Defining symbol actions, e.g., printers and destructors. ## @@ -133,10 +214,11 @@ m4_define([b4_rhs_location], # We do want M4 expansion after # for CPP macros. m4_changecom() -m4_divert(0)dnl -@output @output_parser_name@ -b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl ' - [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[ +m4_divert_push(0)dnl +@output(b4_parser_file_name@)@ +b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C], + [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, + 2006, 2007, 2008, 2009])[ /* C LALR(1) parser skeleton written by Richard Stallman, by simplifying the original so-called "semantic" parser. */ @@ -149,19 +231,25 @@ b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl ' USER NAME SPACE" below. */ ]b4_identification +b4_percent_code_get([[top]])[]dnl m4_if(b4_prefix, [yy], [], -[/* Substitute the variable and function names. */ -#define yyparse b4_prefix[]parse -#define yylex b4_prefix[]lex -#define yyerror b4_prefix[]error -#define yylval b4_prefix[]lval -#define yychar b4_prefix[]char -#define yydebug b4_prefix[]debug -#define yynerrs b4_prefix[]nerrs -b4_locations_if([#define yylloc b4_prefix[]lloc])])[ +[[/* Substitute the variable and function names. */]b4_pull_if([[ +#define yyparse ]b4_prefix[parse]])b4_push_if([[ +#define yypush_parse ]b4_prefix[push_parse]b4_pull_if([[ +#define yypull_parse ]b4_prefix[pull_parse]])[ +#define yypstate_new ]b4_prefix[pstate_new +#define yypstate_delete ]b4_prefix[pstate_delete +#define yypstate ]b4_prefix[pstate]])[ +#define yylex ]b4_prefix[lex +#define yyerror ]b4_prefix[error +#define yylval ]b4_prefix[lval +#define yychar ]b4_prefix[char +#define yydebug ]b4_prefix[debug +#define yynerrs ]b4_prefix[nerrs +]b4_locations_if([[#define yylloc ]b4_prefix[lloc]])])[ /* Copy the first part of user declarations. */ -]b4_pre_prologue[ +]b4_user_pre_prologue[ /* Enabling traces. */ #ifndef YYDEBUG @@ -181,26 +269,25 @@ b4_locations_if([#define yylloc b4_prefix[]lloc])])[ # define YYTOKEN_TABLE ]b4_token_table[ #endif -]m4_ifdef([b4_start_header], -[[/* Copy the %start-header blocks. */ -]b4_start_header])[]dnl +]b4_percent_code_get([[requires]])[]dnl b4_token_enums_defines(b4_tokens)[ #if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED ]m4_ifdef([b4_stype], -[[typedef union ]b4_union_name -b4_stype -/* Line __line__ of yacc.c. */ -b4_syncline([@oline@], [@ofile@]) - YYSTYPE;], -[typedef int YYSTYPE;])[ +[[typedef union ]b4_union_name[ +{ +]b4_user_stype[ +} YYSTYPE; +# define YYSTYPE_IS_TRIVIAL 1]], +[m4_if(b4_tag_seen_flag, 0, +[[typedef int YYSTYPE; +# define YYSTYPE_IS_TRIVIAL 1]])])[ # define yystype YYSTYPE /* obsolescent; will be withdrawn */ # define YYSTYPE_IS_DECLARED 1 -# define YYSTYPE_IS_TRIVIAL 1 -#endif +#endif]b4_locations_if([[ -]b4_locations_if([#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED +#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED typedef struct YYLTYPE { int first_line; @@ -211,19 +298,36 @@ typedef struct YYLTYPE # define yyltype YYLTYPE /* obsolescent; will be withdrawn */ # define YYLTYPE_IS_DECLARED 1 # define YYLTYPE_IS_TRIVIAL 1 -#endif]) - -m4_ifdef([b4_end_header], -[[/* Copy the %end-header blocks. */ -]b4_end_header])[]dnl +#endif]])b4_push_if([[ + +#ifndef YYPUSH_DECLS +# define YYPUSH_DECLS +struct yypstate; +typedef struct yypstate yypstate; +enum { YYPUSH_MORE = 4 }; + +]b4_pull_if([b4_c_function_decl([[yyparse]], [[int]], b4_parse_param) +])b4_c_function_decl([[yypush_parse]], [[int]], + [[[yypstate *yyps]], [[yyps]]]b4_pure_if([, + [[[int yypushed_char]], [[yypushed_char]]], + [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([, + [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [, + b4_parse_param])) +b4_pull_if([b4_c_function_decl([[yypull_parse]], [[int]], + [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [, + b4_parse_param]))]) +b4_c_function_decl([[yypstate_new]], [[yypstate *]], [[[void]], []]) +b4_c_function_decl([[yypstate_delete]], [[void]], + [[[yypstate *yyps]], [[yyps]]])[ +#endif]]) + +b4_percent_code_get([[provides]])[]dnl [/* Copy the second part of user declarations. */ -]b4_post_prologue - -[/* Line __line__ of yacc.c. */ -]b4_syncline([@oline@], [@ofile@])[ +]b4_user_post_prologue +b4_percent_code_get[]dnl -#ifdef short +[#ifdef short # undef short #endif @@ -291,15 +395,16 @@ typedef short int yytype_int16; #ifndef lint # define YYID(n) (n) #else -]b4_c_function_def([YYID], [static int], [[int i], [i]])[ +]b4_c_function_def([YYID], [static int], [[int yyi], [yyi]])[ { - return i; + return yyi; } #endif #if ! defined yyoverflow || YYERROR_VERBOSE -/* The parser invokes alloca or malloc; define the necessary symbols. */ +]b4_push_if([], +[[/* The parser invokes alloca or malloc; define the necessary symbols. */ # ifdef YYSTACK_USE_ALLOCA # if YYSTACK_USE_ALLOCA @@ -324,7 +429,8 @@ typedef short int yytype_int16; # endif # endif -# ifdef YYSTACK_ALLOC +]])dnl +[# ifdef YYSTACK_ALLOC /* Pacify GCC's `empty if-body' warning. */ # define YYSTACK_FREE(Ptr) do { /* empty */; } while (YYID (0)) # ifndef YYSTACK_ALLOC_MAXIMUM @@ -372,11 +478,10 @@ void free (void *); /* INFRINGES ON USER NAME SPACE */ /* A type that is properly aligned for any stack member. */ union yyalloc { - yytype_int16 yyss; - YYSTYPE yyvs; - ]b4_locations_if([ YYLTYPE yyls; -])dnl -[}; + yytype_int16 yyss_alloc; + YYSTYPE yyvs_alloc;]b4_locations_if([ + YYLTYPE yyls_alloc;])[ +}; /* The size of the maximum gap between one aligned stack and the next. */ # define YYSTACK_GAP_MAXIMUM (sizeof (union yyalloc) - 1) @@ -414,12 +519,12 @@ union yyalloc elements in the stack, and YYPTR gives the new location of the stack. Advance YYPTR to a properly aligned location for the next stack. */ -# define YYSTACK_RELOCATE(Stack) \ +# define YYSTACK_RELOCATE(Stack_alloc, Stack) \ do \ { \ YYSIZE_T yynewbytes; \ - YYCOPY (&yyptr->Stack, Stack, yysize); \ - Stack = &yyptr->Stack; \ + YYCOPY (&yyptr->Stack_alloc, Stack, yysize); \ + Stack = &yyptr->Stack_alloc; \ yynewbytes = yystacksize * sizeof (*Stack) + YYSTACK_GAP_MAXIMUM; \ yyptr += yynewbytes / sizeof (*yyptr); \ } \ @@ -505,8 +610,8 @@ static const ]b4_int_type_for([b4_r2])[ yyr2[] = ]b4_r2[ }; -/* YYDEFACT[STATE-NAME] -- Default rule to reduce with in state - STATE-NUM when YYTABLE doesn't specify something else to do. Zero +/* YYDEFACT[STATE-NAME] -- Default reduction number in state STATE-NUM. + Performed when YYTABLE doesn't specify something else to do. Zero means the default is an error. */ static const ]b4_int_type_for([b4_defact])[ yydefact[] = { @@ -535,14 +640,19 @@ static const ]b4_int_type_for([b4_pgoto])[ yypgoto[] = /* YYTABLE[YYPACT[STATE-NUM]]. What to do in state STATE-NUM. If positive, shift that token. If negative, reduce the rule which - number is the opposite. If zero, do what YYDEFACT says. - If YYTABLE_NINF, syntax error. */ + number is the opposite. If YYTABLE_NINF, syntax error. */ #define YYTABLE_NINF ]b4_table_ninf[ static const ]b4_int_type_for([b4_table])[ yytable[] = { ]b4_table[ }; +#define yypact_value_is_default(yystate) \ + ]b4_table_value_equals([[pact]], [[yystate]], [b4_pact_ninf])[ + +#define yytable_value_is_error(yytable_value) \ + ]b4_table_value_equals([[table]], [[yytable_value]], [b4_table_ninf])[ + static const ]b4_int_type_for([b4_check])[ yycheck[] = { ]b4_check[ @@ -678,12 +788,15 @@ do { \ `------------------------------------------------------------------*/ ]b4_c_function_def([yy_stack_print], [static void], - [[yytype_int16 *bottom], [bottom]], - [[yytype_int16 *top], [top]])[ + [[yytype_int16 *yybottom], [yybottom]], + [[yytype_int16 *yytop], [yytop]])[ { YYFPRINTF (stderr, "Stack now"); - for (; bottom <= top; ++bottom) - YYFPRINTF (stderr, " %d", *bottom); + for (; yybottom <= yytop; yybottom++) + { + int yybot = *yybottom; + YYFPRINTF (stderr, " %d", yybot); + } YYFPRINTF (stderr, "\n"); } @@ -702,7 +815,7 @@ do { \ [[YYSTYPE *yyvsp], [yyvsp]], b4_locations_if([[[YYLTYPE *yylsp], [yylsp]], ])[[int yyrule], [yyrule]]m4_ifset([b4_parse_param], [, - ])b4_parse_param)[ + b4_parse_param]))[ { int yynrhs = yyr2[yyrule]; int yyi; @@ -712,12 +825,12 @@ do { \ /* The symbols being reduced. */ for (yyi = 0; yyi < yynrhs; yyi++) { - fprintf (stderr, " $%d = ", yyi + 1); + YYFPRINTF (stderr, " $%d = ", yyi + 1); yy_symbol_print (stderr, yyrhs[yyprhs[yyrule] + yyi], &]b4_rhs_value(yynrhs, yyi + 1)[ ]b4_locations_if([, &]b4_rhs_location(yynrhs, yyi + 1))[]dnl b4_user_args[); - fprintf (stderr, "\n"); + YYFPRINTF (stderr, "\n"); } } @@ -843,14 +956,14 @@ yytnamerr (char *yyres, const char *yystr) # endif /* Copy into YYRESULT an error message about the unexpected token - YYCHAR while in state YYSTATE. Return the number of bytes copied, + YYTOKEN while in state YYSTATE. Return the number of bytes copied, including the terminating null byte. If YYRESULT is null, do not copy anything; just return the number of bytes that would be copied. As a special case, return 0 if an ordinary "syntax error" message will do. Return YYSIZE_MAXIMUM if overflow occurs during size calculation. */ static YYSIZE_T -yysyntax_error (char *yyresult, int yystate, int yychar) +yysyntax_error (char *yyresult, int yystate, int yytoken) { int yyn = yypact[yystate]; @@ -858,67 +971,62 @@ yysyntax_error (char *yyresult, int yystate, int yychar) return 0; else { - int yytype = YYTRANSLATE (yychar); - YYSIZE_T yysize0 = yytnamerr (0, yytname[yytype]); + YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]); YYSIZE_T yysize = yysize0; YYSIZE_T yysize1; int yysize_overflow = 0; enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 }; + /* Internationalized format string. */ + const char *yyformat = 0; + /* Arguments of yyformat. */ char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM]; - int yyx; - -# if 0 - /* This is so xgettext sees the translatable formats that are - constructed on the fly. */ - YY_("syntax error, unexpected %s"); - YY_("syntax error, unexpected %s, expecting %s"); - YY_("syntax error, unexpected %s, expecting %s or %s"); - YY_("syntax error, unexpected %s, expecting %s or %s or %s"); - YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s"); -# endif - char *yyfmt; - char const *yyf; - static char const yyunexpected[] = "syntax error, unexpected %s"; - static char const yyexpecting[] = ", expecting %s"; - static char const yyor[] = " or %s"; - char yyformat[sizeof yyunexpected - + sizeof yyexpecting - 1 - + ((YYERROR_VERBOSE_ARGS_MAXIMUM - 2) - * (sizeof yyor - 1))]; - char const *yyprefix = yyexpecting; /* Start YYX at -YYN if negative to avoid negative indexes in - YYCHECK. */ + YYCHECK. In other words, skip the first -YYN actions for this + state because they are default actions. */ int yyxbegin = yyn < 0 ? -yyn : 0; /* Stay within bounds of both yycheck and yytname. */ int yychecklim = YYLAST - yyn + 1; int yyxend = yychecklim < YYNTOKENS ? yychecklim : YYNTOKENS; - int yycount = 1; + /* Number of reported tokens (one for the "unexpected", one per + "expected"). */ + int yycount = 0; + int yyx; - yyarg[0] = yytname[yytype]; - yyfmt = yystpcpy (yyformat, yyunexpected); + yyarg[yycount++] = yytname[yytoken]; for (yyx = yyxbegin; yyx < yyxend; ++yyx) - if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR) + if (yycheck[yyx + yyn] == yyx && yyx != YYTERROR + && !yytable_value_is_error (yytable[yyx + yyn])) { if (yycount == YYERROR_VERBOSE_ARGS_MAXIMUM) { yycount = 1; yysize = yysize0; - yyformat[sizeof yyunexpected - 1] = '\0'; break; } yyarg[yycount++] = yytname[yyx]; yysize1 = yysize + yytnamerr (0, yytname[yyx]); yysize_overflow |= (yysize1 < yysize); yysize = yysize1; - yyfmt = yystpcpy (yyfmt, yyprefix); - yyprefix = yyor; } - yyf = YY_(yyformat); - yysize1 = yysize + yystrlen (yyf); + switch (yycount) + { +#define YYCASE_(N, S) \ + case N: \ + yyformat = S; \ + break + YYCASE_(1, YY_("syntax error, unexpected %s")); + YYCASE_(2, YY_("syntax error, unexpected %s, expecting %s")); + YYCASE_(3, YY_("syntax error, unexpected %s, expecting %s or %s")); + YYCASE_(4, YY_("syntax error, unexpected %s, expecting %s or %s or %s")); + YYCASE_(5, YY_("syntax error, unexpected %s, expecting %s or %s or %s or %s")); +#undef YYCASE_ + } + + yysize1 = yysize + yystrlen (yyformat); yysize_overflow |= (yysize1 < yysize); yysize = yysize1; @@ -932,19 +1040,17 @@ yysyntax_error (char *yyresult, int yystate, int yychar) produced a string with the wrong number of "%s"s. */ char *yyp = yyresult; int yyi = 0; - while ((*yyp = *yyf) != '\0') - { - if (*yyp == '%' && yyf[1] == 's' && yyi < yycount) - { - yyp += yytnamerr (yyp, yyarg[yyi++]); - yyf += 2; - } - else - { - yyp++; - yyf++; - } - } + while ((*yyp = *yyformat) != '\0') + if (*yyp == '%' && yyformat[1] == 's' && yyi < yycount) + { + yyp += yytnamerr (yyp, yyarg[yyi++]); + yyformat += 2; + } + else + { + yyp++; + yyformat++; + } } return yysize; } @@ -952,40 +1058,120 @@ yysyntax_error (char *yyresult, int yystate, int yychar) #endif /* YYERROR_VERBOSE */ -]b4_yydestruct_generate([b4_c_function_def])[ - +]b4_yydestruct_generate([b4_c_function_def])b4_push_if([], [[ -/* Prevent warnings from -Wmissing-prototypes. */ +/* Prevent warnings from -Wmissing-prototypes. */ #ifdef YYPARSE_PARAM ]b4_c_function_decl([yyparse], [int], - [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[ + [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[ #else /* ! YYPARSE_PARAM */ ]b4_c_function_decl([yyparse], [int], b4_parse_param)[ -#endif /* ! YYPARSE_PARAM */ +#endif /* ! YYPARSE_PARAM */]])b4_pure_if([], [ +b4_declare_scanner_communication_variables])[]b4_push_if([[ -]m4_divert_push([KILL])# ======================== M4 code. -# b4_declare_parser_variables -# --------------------------- -# Declare the variables that are global, or local to YYPARSE if -# pure-parser. -m4_define([b4_declare_parser_variables], -[/* The lookahead symbol. */ -int yychar; -/* The semantic value of the lookahead symbol. */ -YYSTYPE yylval; +struct yypstate + {]b4_declare_parser_state_variables[ + /* Used to determine if this is the first time this instance has + been used. */ + int yynew; + };]b4_pure_if([], [[ -/* Number of syntax errors so far. */ -int yynerrs;b4_locations_if([ -/* Location data for the lookahead symbol. */ -YYLTYPE yylloc;]) -]) -m4_divert_pop([KILL])dnl# ====================== End of M4 code. +static char yypstate_allocated = 0;]])b4_pull_if([ -b4_pure_if([], - [b4_declare_parser_variables]) +b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[ +{ + return yypull_parse (0]m4_ifset([b4_parse_param], + [[, ]b4_c_args(b4_parse_param)])[); +} + +]b4_c_function_def([[yypull_parse]], [[int]], + [[[yypstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [, + b4_parse_param]))[ +{ + int yystatus; + yypstate *yyps_local;]b4_pure_if([[ + int yychar; + YYSTYPE yylval;]b4_locations_if([[ + YYLTYPE yylloc;]])])[ + if (yyps == 0) + { + yyps_local = yypstate_new (); + if (!yyps_local) + {]b4_pure_if([[ + yyerror (]b4_yyerror_args[YY_("memory exhausted"));]], [[ + if (!yypstate_allocated) + yyerror (]b4_yyerror_args[YY_("memory exhausted"));]])[ + return 2; + } + } + else + yyps_local = yyps; + do { + yychar = YYLEX; + yystatus = + yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[); + } while (yystatus == YYPUSH_MORE); + if (yyps == 0) + yypstate_delete (yyps_local); + return yystatus; +}]])[ + +/* Initialize the parser data structure. */ +]b4_c_function_def([[yypstate_new]], [[yypstate *]])[ +{ + yypstate *yyps;]b4_pure_if([], [[ + if (yypstate_allocated) + return 0;]])[ + yyps = (yypstate *) malloc (sizeof *yyps); + if (!yyps) + return 0; + yyps->yynew = 1;]b4_pure_if([], [[ + yypstate_allocated = 1;]])[ + return yyps; +} + +]b4_c_function_def([[yypstate_delete]], [[void]], + [[[yypstate *yyps]], [[yyps]]])[ +{ +#ifndef yyoverflow + /* If the stack was reallocated but the parse did not complete, then the + stack still needs to be freed. */ + if (!yyps->yynew && yyps->yyss != yyps->yyssa) + YYSTACK_FREE (yyps->yyss); +#endif + free (yyps);]b4_pure_if([], [[ + yypstate_allocated = 0;]])[ +} +]b4_pure_if([[ +#define ]b4_prefix[nerrs yyps->]b4_prefix[nerrs]])[ +#define yystate yyps->yystate +#define yyerrstatus yyps->yyerrstatus +#define yyssa yyps->yyssa +#define yyss yyps->yyss +#define yyssp yyps->yyssp +#define yyvsa yyps->yyvsa +#define yyvs yyps->yyvs +#define yyvsp yyps->yyvsp]b4_locations_if([[ +#define yylsa yyps->yylsa +#define yyls yyps->yyls +#define yylsp yyps->yylsp +#define yyerror_range yyps->yyerror_range]])[ +#define yystacksize yyps->yystacksize + + +/*---------------. +| yypush_parse. | +`---------------*/ + +]b4_c_function_def([[yypush_parse]], [[int]], + [[[yypstate *yyps]], [[yyps]]]b4_pure_if([, + [[[int yypushed_char]], [[yypushed_char]]], + [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([, + [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [, + b4_parse_param]))], [[ /*----------. @@ -993,19 +1179,28 @@ b4_pure_if([], `----------*/ #ifdef YYPARSE_PARAM -b4_c_function_def([yyparse], [int], [[void *YYPARSE_PARAM], [YYPARSE_PARAM]]) +]b4_c_function_def([yyparse], [int], + [[void *YYPARSE_PARAM], [YYPARSE_PARAM]])[ #else /* ! YYPARSE_PARAM */ -b4_c_function_def([yyparse], [int], b4_parse_param) -#endif -{[ - ]b4_pure_if([b4_declare_parser_variables])[ - int yystate; +]b4_c_function_def([yyparse], [int], b4_parse_param)[ +#endif]])[ +{]b4_pure_if([b4_declare_scanner_communication_variables +])b4_push_if([b4_pure_if([], [[ + int yypushed_char = yychar; + YYSTYPE yypushed_val = yylval;]b4_locations_if([[ + YYLTYPE yypushed_loc = yylloc;]]) +])], + [b4_declare_parser_state_variables +])[ int yyn; int yyresult; - /* Number of tokens to shift before error messages enabled. */ - int yyerrstatus; /* Lookahead token as an internal (translated) token number. */ - int yytoken = 0; + int yytoken; + /* The variables used to return semantic value and location from the + action routines. */ + YYSTYPE yyval;]b4_locations_if([[ + YYLTYPE yyloc;]])[ + #if YYERROR_VERBOSE /* Buffer for error messages, and its allocated size. */ char yymsgbuf[128]; @@ -1013,81 +1208,56 @@ b4_c_function_def([yyparse], [int], b4_parse_param) YYSIZE_T yymsg_alloc = sizeof yymsgbuf; #endif - /* Three stacks and their tools: - `yyss': related to states, - `yyvs': related to semantic values, - `yyls': related to locations. - - Refer to the stacks thru separate pointers, to allow yyoverflow - to reallocate them elsewhere. */ - - /* The state stack. */ - yytype_int16 yyssa[YYINITDEPTH]; - yytype_int16 *yyss = yyssa; - yytype_int16 *yyssp; - - /* The semantic value stack. */ - YYSTYPE yyvsa[YYINITDEPTH]; - YYSTYPE *yyvs = yyvsa; - YYSTYPE *yyvsp; - -]b4_locations_if( -[[ /* The location stack. */ - YYLTYPE yylsa[YYINITDEPTH]; - YYLTYPE *yyls = yylsa; - YYLTYPE *yylsp; - /* The locations where the error started and ended. */ - YYLTYPE yyerror_range[2];]])[ - #define YYPOPSTACK(N) (yyvsp -= (N), yyssp -= (N)]b4_locations_if([, yylsp -= (N)])[) - YYSIZE_T yystacksize = YYINITDEPTH; - - /* The variables used to return semantic value and location from the - action routines. */ - YYSTYPE yyval; -]b4_locations_if([ YYLTYPE yyloc;])[ - /* The number of symbols on the RHS of the reduced rule. Keep to zero when no symbol should be popped. */ - int yylen = 0; + int yylen = 0;]b4_push_if([[ + + if (!yyps->yynew) + { + yyn = yypact[yystate]; + goto yyread_pushed_token; + }]])[ + + yytoken = 0; + yyss = yyssa; + yyvs = yyvsa;]b4_locations_if([[ + yyls = yylsa;]])[ + yystacksize = YYINITDEPTH; YYDPRINTF ((stderr, "Starting parse\n")); yystate = 0; yyerrstatus = 0; yynerrs = 0; - yychar = YYEMPTY; /* Cause a token to be read. */ + yychar = YYEMPTY; /* Cause a token to be read. */ /* Initialize stack pointers. Waste one element of value and location stack so that they stay on the same level as the state stack. The wasted elements are never initialized. */ - yyssp = yyss; - yyvsp = yyvs; -]b4_locations_if([[ yylsp = yyls; + yyvsp = yyvs;]b4_locations_if([[ + yylsp = yyls; + #if YYLTYPE_IS_TRIVIAL /* Initialize the default location before parsing starts. */ - yylloc.first_line = yylloc.last_line = 1; - yylloc.first_column = yylloc.last_column = 0; -#endif -]]) -m4_ifdef([b4_initial_action], [ + yylloc.first_line = yylloc.last_line = ]b4_location_initial_line[; + yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[; +#endif]]) +m4_ifdef([b4_initial_action],[ m4_pushdef([b4_at_dollar], [m4_define([b4_at_dollar_used])yylloc])dnl m4_pushdef([b4_dollar_dollar], [m4_define([b4_dollar_dollar_used])yylval])dnl - /* User initialization code. */ -b4_initial_action +/* User initialization code. */ +b4_user_initial_action m4_popdef([b4_dollar_dollar])dnl -m4_popdef([b4_at_dollar])dnl -/* Line __line__ of yacc.c. */ -b4_syncline([@oline@], [@ofile@]) -])dnl +m4_popdef([b4_at_dollar])])dnl m4_ifdef([b4_dollar_dollar_used],[[ yyvsp[0] = yylval; ]])dnl m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; -]])dnl -[ goto yysetstate; +]])[ + goto yysetstate; /*------------------------------------------------------------. | yynewstate -- Push a new state, which is found in yystate. | @@ -1111,8 +1281,8 @@ m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; these so that the &'s don't force the real ones into memory. */ YYSTYPE *yyvs1 = yyvs; - yytype_int16 *yyss1 = yyss; -]b4_locations_if([ YYLTYPE *yyls1 = yyls;])[ + yytype_int16 *yyss1 = yyss;]b4_locations_if([ + YYLTYPE *yyls1 = yyls;])[ /* Each stack pointer address is followed by the size of the data in use in that stack, in bytes. This used to be a @@ -1120,10 +1290,11 @@ m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; be undefined if yyoverflow is a macro. */ yyoverflow (YY_("memory exhausted"), &yyss1, yysize * sizeof (*yyssp), - &yyvs1, yysize * sizeof (*yyvsp), -]b4_locations_if([ &yyls1, yysize * sizeof (*yylsp),])[ + &yyvs1, yysize * sizeof (*yyvsp),]b4_locations_if([ + &yyls1, yysize * sizeof (*yylsp),])[ &yystacksize); -]b4_locations_if([ yyls = yyls1;])[ +]b4_locations_if([ + yyls = yyls1;])[ yyss = yyss1; yyvs = yyvs1; } @@ -1144,9 +1315,9 @@ m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; (union yyalloc *) YYSTACK_ALLOC (YYSTACK_BYTES (yystacksize)); if (! yyptr) goto yyexhaustedlab; - YYSTACK_RELOCATE (yyss); - YYSTACK_RELOCATE (yyvs); -]b4_locations_if([ YYSTACK_RELOCATE (yyls);])[ + YYSTACK_RELOCATE (yyss_alloc, yyss); + YYSTACK_RELOCATE (yyvs_alloc, yyvs);]b4_locations_if([ + YYSTACK_RELOCATE (yyls_alloc, yyls);])[ # undef YYSTACK_RELOCATE if (yyss1 != yyssa) YYSTACK_FREE (yyss1); @@ -1155,8 +1326,8 @@ m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; #endif /* no yyoverflow */ yyssp = yyss + yysize - 1; - yyvsp = yyvs + yysize - 1; -]b4_locations_if([ yylsp = yyls + yysize - 1;])[ + yyvsp = yyvs + yysize - 1;]b4_locations_if([ + yylsp = yyls + yysize - 1;])[ YYDPRINTF ((stderr, "Stack size increased to %lu\n", (unsigned long int) yystacksize)); @@ -1167,6 +1338,9 @@ m4_ifdef([b4_at_dollar_used], [[ yylsp[0] = yylloc; YYDPRINTF ((stderr, "Entering state %d\n", yystate)); + if (yystate == YYFINAL) + YYACCEPT; + goto yybackup; /*-----------. @@ -1179,16 +1353,35 @@ yybackup: /* First try to decide what to do without reference to lookahead token. */ yyn = yypact[yystate]; - if (yyn == YYPACT_NINF) + if (yypact_value_is_default (yyn)) goto yydefault; /* Not known => get a lookahead token if don't already have one. */ /* YYCHAR is either YYEMPTY or YYEOF or a valid lookahead symbol. */ if (yychar == YYEMPTY) - { - YYDPRINTF ((stderr, "Reading a token: ")); - yychar = YYLEX; + {]b4_push_if([[ + if (!yyps->yynew) + {]b4_use_push_for_pull_if([], [[ + YYDPRINTF ((stderr, "Return for a new token:\n"));]])[ + yyresult = YYPUSH_MORE; + goto yypushreturn; + } + yyps->yynew = 0;]b4_pure_if([], [[ + /* Restoring the pushed token is only necessary for the first + yypush_parse invocation since subsequent invocations don't overwrite + it before jumping to yyread_pushed_token. */ + yychar = yypushed_char; + yylval = yypushed_val;]b4_locations_if([[ + yylloc = yypushed_loc;]])])[ +yyread_pushed_token:]])[ + YYDPRINTF ((stderr, "Reading a token: "));]b4_push_if([b4_pure_if([[ + yychar = yypushed_char; + if (yypushed_val) + yylval = *yypushed_val;]b4_locations_if([[ + if (yypushed_loc) + yylloc = *yypushed_loc;]])])], [[ + yychar = YYLEX;]])[ } if (yychar <= YYEOF) @@ -1210,15 +1403,12 @@ yybackup: yyn = yytable[yyn]; if (yyn <= 0) { - if (yyn == 0 || yyn == YYTABLE_NINF) + if (yytable_value_is_error (yyn)) goto yyerrlab; yyn = -yyn; goto yyreduce; } - if (yyn == YYFINAL) - YYACCEPT; - /* Count tokens shifted since error; after three, turn off error status. */ if (yyerrstatus) @@ -1227,9 +1417,8 @@ yybackup: /* Shift the lookahead token. */ YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc); - /* Discard the shifted token unless it is eof. */ - if (yychar != YYEOF) - yychar = YYEMPTY; + /* Discard the shifted token. */ + yychar = YYEMPTY; yystate = yyn; *++yyvsp = yylval; @@ -1270,9 +1459,7 @@ yyreduce: YY_REDUCE_PRINT (yyn); switch (yyn) { - ]b4_actions -/* Line __line__ of yacc.c. */ -b4_syncline([@oline@], [@ofile@])[ + ]b4_user_actions[ default: break; } YY_SYMBOL_PRINT ("-> $$ =", yyr1[yyn], &yyval, &yyloc); @@ -1281,8 +1468,8 @@ b4_syncline([@oline@], [@ofile@])[ yylen = 0; YY_STACK_PRINT (yyss, yyssp); - *++yyvsp = yyval; -]b4_locations_if([ *++yylsp = yyloc;])[ + *++yyvsp = yyval;]b4_locations_if([ + *++yylsp = yyloc;])[ /* Now `shift' the result of the reduction. Determine what state that goes to, based on the state we popped back to and the rule @@ -1311,7 +1498,7 @@ yyerrlab: yyerror (]b4_yyerror_args[YY_("syntax error")); #else { - YYSIZE_T yysize = yysyntax_error (0, yystate, yychar); + YYSIZE_T yysize = yysyntax_error (0, yystate, yytoken); if (yymsg_alloc < yysize && yymsg_alloc < YYSTACK_ALLOC_MAXIMUM) { YYSIZE_T yyalloc = 2 * yysize; @@ -1331,7 +1518,7 @@ yyerrlab: if (0 < yysize && yysize <= yymsg_alloc) { - (void) yysyntax_error (yymsg, yystate, yychar); + (void) yysyntax_error (yymsg, yystate, yytoken); yyerror (]b4_yyerror_args[yymsg); } else @@ -1400,7 +1587,7 @@ yyerrlab1: for (;;) { yyn = yypact[yystate]; - if (yyn != YYPACT_NINF) + if (!yypact_value_is_default (yyn)) { yyn += YYTERROR; if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYTERROR) @@ -1423,9 +1610,6 @@ yyerrlab1: YY_STACK_PRINT (yyss, yyssp); } - if (yyn == YYFINAL) - YYACCEPT; - *++yyvsp = yylval; ]b4_locations_if([[ yyerror_range[1] = yylloc; @@ -1455,7 +1639,7 @@ yyabortlab: yyresult = 1; goto yyreturn; -#ifndef yyoverflow +#if !defined(yyoverflow) || YYERROR_VERBOSE /*-------------------------------------------------. | yyexhaustedlab -- memory exhaustion comes here. | `-------------------------------------------------*/ @@ -1466,7 +1650,7 @@ yyexhaustedlab: #endif yyreturn: - if (yychar != YYEOF && yychar != YYEMPTY) + if (yychar != YYEMPTY) yydestruct ("Cleanup: discarding lookahead", yytoken, &yylval]b4_locations_if([, &yylloc])[]b4_user_args[); /* Do not reclaim the symbols of the rule which action triggered @@ -1482,43 +1666,45 @@ yyreturn: #ifndef yyoverflow if (yyss != yyssa) YYSTACK_FREE (yyss); -#endif +#endif]b4_push_if([[ + yyps->yynew = 1; + +yypushreturn:]])[ #if YYERROR_VERBOSE if (yymsg != yymsgbuf) YYSTACK_FREE (yymsg); #endif /* Make sure YYID is used. */ return YYID (yyresult); -]} +} -b4_epilogue +]b4_epilogue b4_defines_if( -[@output @output_header_name@ -b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl ' - [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006]) +[@output(b4_spec_defines_file@)@ +b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C], + [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, + 2006, 2007, 2008, 2009]) -m4_ifdef([b4_start_header], -[[/* Copy the %start-header blocks. */ -]b4_start_header])[]dnl +b4_percent_code_get([[requires]])[]dnl b4_token_enums_defines(b4_tokens) [#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED ]m4_ifdef([b4_stype], -[[typedef union ]b4_union_name -b4_stype -/* Line __line__ of yacc.c. */ -b4_syncline([@oline@], [@ofile@]) - YYSTYPE;], -[typedef int YYSTYPE;])[ +[[typedef union ]b4_union_name[ +{ +]b4_user_stype[ +} YYSTYPE; +# define YYSTYPE_IS_TRIVIAL 1]], +[m4_if(b4_tag_seen_flag, 0, +[[typedef int YYSTYPE; +# define YYSTYPE_IS_TRIVIAL 1]])])[ # define yystype YYSTYPE /* obsolescent; will be withdrawn */ # define YYSTYPE_IS_DECLARED 1 -# define YYSTYPE_IS_TRIVIAL 1 #endif -]b4_pure_if([], -[extern YYSTYPE b4_prefix[]lval;]) +]b4_pure_if([], [[extern YYSTYPE ]b4_prefix[lval;]]) b4_locations_if( [#if ! defined YYLTYPE && ! defined YYLTYPE_IS_DECLARED @@ -1534,11 +1720,30 @@ typedef struct YYLTYPE # define YYLTYPE_IS_TRIVIAL 1 #endif -]b4_pure_if([], - [extern YYLTYPE b4_prefix[]lloc;]) +]b4_pure_if([], [[extern YYLTYPE ]b4_prefix[lloc;]]) )dnl b4_locations_if - -m4_ifdef([b4_end_header], -[[/* Copy the %end-header blocks. */ -]b4_end_header])[]dnl +b4_push_if([[ +#ifndef YYPUSH_DECLS +# define YYPUSH_DECLS +struct ]b4_prefix[pstate; +typedef struct ]b4_prefix[pstate ]b4_prefix[pstate; +enum { YYPUSH_MORE = 4 }; +]b4_pull_if([b4_c_function_decl([b4_prefix[parse]], [[int]], b4_parse_param) +])b4_c_function_decl([b4_prefix[push_parse]], [[int]], + [[b4_prefix[pstate *yyps]], [[yyps]]]b4_pure_if([, + [[[int yypushed_char]], [[yypushed_char]]], + [[[YYSTYPE const *yypushed_val]], [[yypushed_val]]]b4_locations_if([, + [[[YYLTYPE const *yypushed_loc]], [[yypushed_loc]]]])])m4_ifset([b4_parse_param], [, + b4_parse_param])) +b4_pull_if([b4_c_function_decl([b4_prefix[pull_parse]], [[int]], + [[b4_prefix[pstate *yyps]], [[yyps]]]m4_ifset([b4_parse_param], [, + b4_parse_param]))]) +b4_c_function_decl([b4_prefix[pstate_new]], [b4_prefix[pstate *]], + [[[void]], []]) +b4_c_function_decl([b4_prefix[pstate_delete]], [[void]], + [[b4_prefix[pstate *yyps]], [[yyps]]])[ +#endif +]]) +b4_percent_code_get([[provides]])[]dnl ])dnl b4_defines_if +m4_divert_pop(0)